Seed Germination of Orchid | Research

Seed Germination of Orchid | Research There are a lot of orchid species being listed as endangered species due to over-collection and lack of conservation. The survival rate of orchid in the nature is relatively low. This research is aimed to investigate the effect of organic additives on in vitro seed germination of Vanda hastfera, an endemic species of orchid to Borneo. By the end of this investigation, we expect to determine the medium composition and germinating conditions that are favourable for in vitro seed germination of Vanda hastifera. Various organic additives such as potato extract, peptone, coconut water, tomato juice and banana pulp will be added into the medium to examine their effects on the seed germination. The physical conditions such as light intensity, temperature, pH and relative humidity will be adjusted to the most suitable condition in compliance with the percentage of seed germination. The culture room will be maintained at a 16 light/8 dark photoperiod with environmental temperature of 25 ±2à ‚ °C. Also, the protocol will be designed by taking into account of the cost-effectiveness of the project. Keywords: Vanda hastifera, in vitro seed germination, protocorm,  ½ MS medium 1.0 Introduction The family Orchidaceae is considered as one of the largest flowering plant families which comprised of over 880 genera and approximately 25,000 to 30,000 species worldwide (Paek, Hahn Park, 2011; Bektas, Cà ¼ce Sà ¶kmen, 2013). Paek et al. (2011) indicated that the high degree of compatibility among genera and species allowed the registration of bi- and plurigeneric hybrids to reach over the number of 100,000. Lamb (as cited in Chan, Lamb, Shim Wood, 1994, p. 5) claimed that approximately 10% of orchids in the world were found in Borneo, which is around 2500-3000 species. Among these about 30-40% are said to be endemic species. Borneo is whereby denoted as â€Å"Orchid Island† (Chan et al., 1994). As discussed by Beaman, Wood, Beaman and Beaman (2001), Vanda is a monopodial genus of orchids that produce attractive flowers which are generally found at hill-forests or tropical lowlands. Vanda hastifera Rchb.f. (Orchidaceae) is endemic to Borneo in which this epiphytic species inhabits at hill forest, lowland or coasted area (Chan et al., 1994). Vanda hastifera can be found at Kinabatang district in Sabah, Pontianak area in Kalimantan Barat, and Kuching area in Sarawak. Vanda hastifera is scented flower that can blooms for around 10 days in which it produces reflexed petals and sepals (Chan et al., 1994). The sepals of Vanda hastifera are marked by a few reddish brown spots. The uniqueness of this species is that it is very hairy at the margin of its lip as well as the auricles (Beaman et al., 2001). Over-collection of orchids has endangered some of the species which have high commercial value in a variety of industries like the medical industry, horticultural, ornamental so on. The survival of orchid in wild habitat is very low which also press the need to perform in vitro germination of the seeds. Vanda is one of the commonly cultivated genera that have high commercial value (Uchida, 1994). Based on the study that is fulfilled by Beaman et al. (2001), poorly preserved herbarium collections and insufficient information about the flower species for genus Vanda have made it substantial to practise cultivation upon the species. The significance in performing in vitro seed germination of Vanda hastifera is to optimize the seed germination process under in vitro condition in which the conditions and requirements of seed germination can be well-controlled. This can prevent the waste of resources and conserve the process of seed germination in making sure of the efficacy of the process . Furthermore, the addition of organic additives in appropriate concentration under proper circumstances can also enhance the effectiveness of seed germination carried out in vitro with relatively low expenses. The objectives of the study are: To investigate the effect of organic additives on in vitro seed germination of Vanda hastifera. To optimize the in vitro seed germination process of Vanda hastifera. To develop an appropriate and cost-effective protocol for in vitro seed germination of Vanda hastifera. 2.0 Literature Review 2.1 Vanda hastifera (Orchidaceae) According to Metusala and O’Byrne (2012), there are around ten taxa comprised in the genus Vanda section Hastifera which are distributed in the area of Borneo, Philippines, Lesser Sunda Island, Maluku, Sulawesi and New Guinea. The typical characteristics of section Hastifera are like complex lip with its apex divided into two buttock-like lobules and two dagger-like lobules bulging sideways from the base of the thickened mid-lobe (Metusala O’Byrne, 2012). Among the species of orchids in genus Vanda, Vanda scandens and Vanda hastifera have exhibiting all of the characteristics of section Hastifera. The name of Vanda hastifera is derived from Latin hastifer. Vanda hastifera is a fascinating species of orchid that has outstanding appearance which the fragrant flower for about 4.5 cm to 5 cm is fleshy and marked unevenly with brownish red blotches (Chan et al., 1994). Beautiful pale cream or pale yellow sepals and petals are reflexed. As revealed by Chan et al. (1994), the both the dorsal sepals and lateral sepals are spathulate with undulant margin. The white side lobes of the lip has shiny mid-lode at the top and side of the apex which joined to a short column-foot. The lower surface of the apex is purple to brownish purple with two reddish lines near the base. There is found to be a very hairy auricle at the base of the lip (Chan et al., 1994). Likewise, the edge of the mid-lobe is also hairy. The ligulate leaves of Vanda hastifera is about 15-20 Ãâ€" 2-2.5 cm which is dense and linked to a sheathing base. The embryo of Vanda differentiates into three sections in its early development, which are parenchymatous, meristematic and suspensor (Arditti, 1967). Based on the research done by Alvarez (as cited in Arditti, 1967, p. 4), the parenchymatous tissue is acting on supplying nutrition to meristem after the early degeneration of suspensor. 2.2 Orchid seed germination The orchid seed is very fine and delicate. The weight of the seed is varied from 0.3  µg to 14  µg; the length is to be at a range of 0.25 mm to 1.2 mm; and the width is around that of 0.09 mm to 0.27 mm (Arditti, 1967). The seed of orchid is normally produced in a large quantity in which Arditti (1967) indicated that a capsule may contains about 1,300 to 4,000,000 seeds. The orchid embryo usually maintains its globular or spherical shape in contrast to the great variety of the shape of the seed coat which may be in globular, elliptical, rounded, butterfly shaped or fusiform (Arditti, 1967). The swelling of embryo during germination will rupture the seed coat. This will lead to the formation of spherical or cone-shaped seedling which is the protocorm stage for orchid seed germination (Arditti, 1967). The protocorm is an undifferentiated mass of cells (McKendrick, 2000). Subsequently the first leaf primordium will project out of the upper flat surface. The protocorm then starts growing and the absorbing hairs starts to emerge at the periphery of the lower surface. Next, the first minute leaf is produced (Arditti, 1967). Soon after this, the first root will be formed. The development continues until a small plant takes it shape. In relation to orchid seed germination and development in nature, fungus infection is seemed to be a substantial factor for certain tropical epiphytic orchids (Arditti, 1967). This is because as the seeds are insufficient with the carbohydrate reserves, the young plant requires the supply of nutrients, sugar and organic material from the mycorrhizal fungus until the plant is capable of producing its own food (McKendrick, 2000). Once the fungus is penetrated into the seed, it is to be as an exogenous carbohydrate for the growing embryo upon the digestion of the fungal hyphae (Kauth, 2005). Moreover, fungi may be treated as a water supply as germination is started by imbibition (Yoder et al. as cited in Kauth, 2005, p. 2). 2.3 Research history of In vitro seed germination of orchid In vitro methods are used to improve and assist the development of plants that are vulnerable to grow in the nature (Fay, 1992). The use of symbiotic and asymbiotic in vitro germination techniques have been used for the seed germination of some orchid species (Fay, 1992). For the seeds that are to be germinated symbiotically, sowing is performed with a piece of mycorrhizal fungus. Symbiotic relationship is established when the fungus propagates and colonized the seed germination media (Mckendrick, 2000). Before the plant capable of making its own food, the fungus is thought to be sustaining the protocorm. Nonetheless, the proper strain of mycorrhizal fungus is required or else it might lead to seedling death as the fungus strain becomes parasitic. Proliferation of temperate terrestrial orchids is suitable to apply with this technique. On the other hand, tropical orchids are easier to grow as compared to temperate terrestrial orchids. Thus, asymbiotic germination method is normally us ed for the in vitro germination of tropical orchids. The media used appeared to be more intricate than that used in symbiotic germination (McKendrick, 2000). Without the mycorrhizal fungus, the nutrients required for proper germination have to be supplied fully. There are examples of simple media which are used for the seed germination of orchid which include Vacin and Went (VW), Hyponex and Knudson C medium (Paek et al., 2011). Without using the mycorrhizal fungus as a symbiotic element, Knudson (as cited in Kauth, 200, p. 3) has achieved successful seed germination for several epiphytic orchid genera which lead to the development of Knudson Solution B. After that, Knudson substituted ferric phosphate with ferrous sulphate and supplemented manganese into the medium in order to develop a more complex Knudson C medium that enable the in vitro seed germination and plant tissue culture suitable for more species (Kauth, 2005). Table 1: Media composition of  ½ MS, VW and Knudson media (Paek et al., 2011). Component  ½ MS (mg/L) VW (mg/L) Knudson (mg/L) Macronutrients NH4NO3 825 (NH4)2SO4 500 500 Ca3(PO4)2 200 Ca(NO3)2. 4H2O 1000 CaCl2.H2O 220 MgSO47H2O 185 250 250 KNO3 950 525 KH2PO4 85 250 250 Micronutrients Na2EDTA 18.65 FeSO4.7H2O 13.9 25 Fe2(C4H4O4).2H2O 28 H3BO3 3.1 CoCl2.6H2O 0.0125 CuSO4.5H2O 0.0125 MnSO4.4H2O 11.15 7.5 KI 0.415 Na2MoO4.2H2O 0.125 ZnSO4.4H2O 4.3 Organics Glycine 2 Myo-inositol 100 100 Nicotinic acid 0.5 1 Pyridoxine 0.5 Thiamine HCl 0.1 1 Adenine sulphate 10 The media composition is an important factor that will affect the efficiency of seed germination in vitro. MS medium added with 2,4-Dichlorophenoxyacetic acid (2,4-D) was reported to be favourable for the formation of protocorm-like-bodies (PLBs) and regeneration of plantlet for Dendrobium orchid (Nasiruddin et al. as cited in Aktar, Nasiruddin Hossain, 2008, p. 69). According to Mishra, Rawat, Nema and Shirin (2013), who have done an investigation on the effect of medium strength on in vitro germination of Pterocarpus marsupium Roxb. stated that by using different strength of MS basal medium, there is no significant difference on the rate of germination. Therefore, the concentration of MS medium used can be diluted to half so as to reduce the cost without affecting the efficacy of seed germination. Table 2: Modified Hyponex media composition (Paek et al., 2011). Component Seed germination Protocorm multiplication First transplanting Second transplanting Hyponex (g/L) N:P:K= 6.5:6:19 3.0 1.0 1.0 1.0 N:P:K= 20:20:20 1.0 1.0 1.0 Adenine Sulfate (g/L) 5.0 Peptone (g/L) 2.0 2.0 3.0 Coconut water (%) 20 10 10 Potato or banana homogenate (g/L) 30-100 30-100 Activated charcoal (%) 0.05 0.05 0.05 0.05 Germination of seed can be affected by seed maturity. By using asymbiotic in vitro seed germination technique, immature seed has found to be more effective than mature seed to germinate. Claiming that the embryos have developed completely but not yet dedicated to enter the dormant stage, Light and MacConaill (as cited in Fay, 1992, p. 2) suggested that seeds harvested at 43 to 58 days after pollination has found to be ideal for in vitro seed germination of orchid. 2.4 Effects of organic additives on in vitro seed germination Natural complex additives are added into the simple media lack amino acids or vitamins. Examples of organic additives are like potato extracts, coconut water, banana pulp, peptone, and tomato juice. Activated charcoal is believed to have ameliorated the aeration as well as absorbs ethylene and phenolic inhibitors which are the growth inhibitors. Nevertheless, Paek et al. (2011) suggested that the use of charcoal has to be careful as it also absorbs vitamins and plant growth regulators in the culture medium. Occasionally, low concentration of auxin and cytokinin are needed and supplemented into the media in the early stage of protocorm proliferation for certain species of orchids (Paek et al., 2011). Besides, sucrose is also being added into the media in the early stage of tissue culture. However, Paek et al. (2011) claimed that the plantlet differentiation of some genera of orchids may be improved in a medium which has low concentration of sugar. A research done by Islam, Akter and Prodhan (2011) which used Vanda roxburgii orchid as model has proven that by adding potato extract into the medium of seed germination in vitro, the percentage of seed germination and seedling growth can be increased substantially. From their study, they have found that by supplementing potato extract at the concentration of 200 ml/L showed the best percentage of seed germination for Vanda roxburgii which is 78.24% as compared to the 17.2% of control (Islam et al., 2011). Therefore, it is proposed by Islam et al. (2011) that seed germination of Vanda orchids can be boosted by adding appropriate concentration of potato extract into the medium. It is testified that in 100 g of raw materials of potato extract, there is 1.0 mg of niacin which is believed to be accountable for the orchids’ development. Recent study accomplished by Tharapan, Thepsithar and Obsuwan (2014) has observed the effect of potato extract (PE), soy milk, cow milk and peptone on the development of Dendrobium discolor’s protocorms and seedlings growth of Dendrobium Judy Rutz by using Hyponex medium. After two months, protocorms were found developed in all culture vessels with different combinations of organic supplements in Hyponex medium. For the seedling growth of Dendrobium Judy Rutz, Hyponex medium with supplementation of 100 mL/L of potato extract and 2.0 g/L of peptone has achieved with the maximum fresh and dry weight (Tharapan et al., 2014). Conversely, the dry weights obtained from Hyponex medium supplemented with peptone, organic soy powder and milk powder for Dendrobium Judy Rutz’ seedling growth have no significant difference in comparison to the control. On the other hand, the maximum fresh and dried weight as well as shoot height of Dendrobium discolor’s protocorms were obtain ed in Hyponex medium containing potato extract with 2.0 g/L peptone (Tharapan et al., 2014). 3.0 Materials and Methods 3.1 List of Materials Seeds of Vanda hastifera, 0.2% (w/v) HgCl2, 70% ethanol, 1% 2,3,5-tripheny tetrazolium chloride (TTC), MS medium, KC medium, Hyponex medium, coconut water, potato extract, banana homogenate, peptone, yeast extract, tomato juice, 0.9% (w/v) agar, sucrose, activated charcoal, NaOH and HCl. 3.2 Sterilization of the seeds Immature seeds of Vanda hastifera is surface sterilize by submerging in 0.2% (w/v) HgCl2 for 10 minutes. After this, the seeds will be dipping in 70% ethanol for 15 seconds for further sterilization. Sterilized seeds are then washed with sterile distilled water for 5 to 6 times. These procedures are operated in a laminar flow hood. The viability of the seeds is examined by staining the seed with 1% 2,3,5-triphenyl tetrazolium chloride (TTC) solution (pH 7). The staining is carried out in darkness. Observation is performed by using stereoscopic microscope (Yamazaki Miyoshi, 2006). Viable embryos are those shows orange to red colour under the stereoscopic microscope observation (Lauzer, Renaut, St-Arnaud Barabà ©, 2007). This procedure has proven effective for testing the viability of epiphytic tropical orchid’s seeds (Singh as cited in Vujanovic, St-Arnaud, Barabà © Thibeault, 2000, p.79). 3.3 Media preparation Half and full strength Murashige and Skoog (MS) medium (Murashige and Skoog, 1967), KC medium (Knudson, 1946) and Hyponex medium (Kano, 1965) are supplemented with various organic additives in different concentration to examine their effects on in vitro seed germination of Vanda hastifera. Coconut water (5, 10, 15, 20% v/v), peptone (0.2% w/v), yeast extract (0.2% w/v), potato extract (1, 2, 4, 6 g/L) (w/v), banana homogenate (2.5-12.5% w/v), tomato juice (10-20% v/v) are added into the medium. 30 g/L of sucrose and 2 g/L or activated charcoal are also supplemented into the medium. The medium is solidified with 0.9% (w/v) agar. The pH of the medium is adjusted by using NaOH or HCl to between 5.4 to 5.8 prior to autoclave at 121 under 15 p.s.i. for 20 minutes. (Jawan, Gansau Abdullah, 2010; Ali, Murdad Latip, 2011) 3.4 Inoculation The sterilized seeds are then inoculated on to the medium prepared. The spreading of the seeds is to be even over the entire surface of the medium. The Petri dishes with media inoculated with seeds are kept in the culture room provided with 16 light /8 dark hours of photoperiod at 25 ±2. The light intensity is to be at 20-50  µmolm-2s-1 provided by cool white fluorescent tubes (Jawan et al., 2010; Ali et al., 2011). The relative humidity is adjusted at 70-80%. 3.5 Observation and analytical technique Seed germination is indicated by the development of protocorms. According to Ali et al. (2011), it can be seen by the appearance of protocorm from the testa. Observation is carried out at a 20 days interval for up to 60-70 days by using a dissecting light microscope. The number of germinating seed is recorded and tabulated in a table as the percentage of the total number of seeds inoculated (Ali et al., 2011). Analysis of variance (ANOVA) is used to analyse the data. The significant difference or treatment means is subjected to Duncan’s Multiple Range Test (DMRT) at 5% level of probability (Aktar et al., 2008; Ali et al., 2011). 4.0 Expected outcome The seed germination of Vanda hastifera that is conducted in vitro will be very effective. It is greatly affected by the medium composition, concentration of organic additives supplemented and the light intensity. It is expected that the  ½ MS will be the best medium for in vitro germination of Vanda hastifera. Organic additives like potato extract, peptone and coconut water are expected to give better results in the experiment as compare to other organic additives.

Constable: Weymouth Bay: Difficulty with Landscapes :: essays papers

Constable: Weymouth Bay: Difficulty with Landscapes John Constable was born into a wealthy family in the English countryside. It was originally suspected that he would take over his father’s buisness because his older brother was mentally handicapped. However as his interest in painting grew his mother realized that this was a course he was choosing and he was good enough to pursue. Ironically when Constable turned to landscapes, his mother worried about his finances and urged him to turn to portraiture. In his lifetime Constable rarely sold any paintings despite being inducted into the Royal Academy of Art. Constable has talent, yes, absolutely. I could never capture his landscapes and ‘Weymouth Bay’ is a gorgeous recreation of what Constable saw. It is not an idealized version it is exactly as he saw it. This is where my problem with landscapes begins. I cannot find myself excited by them. It has taken me weeks of procrastination about how to write this paper. ‘Weymouth Bay’ was painted by Constable during his honeymoon in 1816. The scene is Dorset. There is another version of this painting in the Louvre. I think that the painting is easy on the eye. It would have been simpler to write about a Turner because his work in my opinion contains pieces of originality that Constable fails to achieve. His work is straight forward, an almost perfect recreation of exactly what Constable saw. Experts believe that the view in ‘Weymouth Bay’ is from an angle towards the west; west of Redcliff Point. It is a barren picture, the land is empty, cold. If landscape instills feeling of environment, Constable achieves that. When the painting was exhibited at the British Institution in 1819 the New Monthly Magazine wrote that the painting was, â€Å"a clear, well-colored picture.† To this description, yay. I do not aspire to be a critic of art and even now as I type this paper, I find myself increasingly nervous to the hail of criticism I’m opening myself up to. However, as I wandered through the halls of the National Gallery the urge to challenge myself and write about something that caught my eye because of the simplicity of it not because it was thought provoking was too much. Simple is not a bad thing. However if all art was simple it would in my opinion cease to be relevant. But would Constable be a relevant painter today?

things Fall Apart Essay -- essays research papers

CHAPTER 10 A very dramatic public ceremony is described in detail that involves meting out justice. On the village commons ppl gather and the rest of the village is behind them. Nine stools are placed for the egwugwu to sit. Egwugwu represent the spirits of their ancestors and are respected members of the community who can dispense justice in trials. Women stood on the edges of the circle. A gong is loudly blasted and the guttural voice of the egwugwu is heard. When he makes his appearance, it is very dramatic as he wears a fearful looking mask and pretends to scare the women. With him , nine other masked men emerge. Okonkwo's wives notice that one of the egwugwu walks with a springy step such as Okonkwo does. They also notice he is absent from where the elders sit. The leader of the egwugwu speaks some words. The hearing then begins. It involves a man named Uzowulu whose wife was taken away by him by her family. He wishes that either she return or they pay him his bride-price. The women's brother argues that she has been rescued because she is beaten every day and that she will return on the promise that he never hit her again. After the discussion the leader returns with a verdict. He tells Uzowulu to bring wine to his wife's family and beg his wife to return to him. He also expresses disgust at Uzowulu's cowardice in beating women and askes him to accept his brother-in-law's offer. The egwugwu and their system of justice are similar to Western society's notion of a fair public trial. The men who conduct the hearings are the senior members of the society, and have political as well as economic power, but they mask themselves to hide their identity, so that a fair judgment can be given. Here each party is given a chance to state their case and then the egwugwu leave to debate a verdict as well as a punishment or remuneration. The dismissive attitude one of the elders shows for a trial of this kind reveals the lack of power and respect that women had in this society. Not only does the women's brother speak for her, but she has no say in the verdict handed to her husband. Whether or not she wants to return is overlooked by the larger economic reason for her return. Her husband's hand is slapped for being so violent but other than that he is not punished for his crime, simply fined CHAPTER 11 One night, Ezinma and her mother are sitting in... ...anly fsdihsdlhsdodsdjohndjsjdkl hd shduiosy yuio sduisui sd fsdihsdlhsdodsdjohndjsjdkl hd shduiosy yuio sduisui sdfsdihsdlhsdodsdjohndjsjdkl hd shduiosy yuio sduisui sdfsdihsdlhsdodsdjohndjsjdkl hd shduiosy yuio sduisui sdfsdihsdlhsdodsdjohndjsjdkl hd shduiosy yuio sduisui sdfsdihsdlhsdodsdjohndjsjdkl hd shduiosy yuio sduisui sdfsdihsdlhsdodsdjohndjsjdkl hd shduiosy yuio sduisui sdfsdihsdlhsdodsdjohndjsjdkl hd shduiosy yuio sduisui sdfsdihsdlhsdodsdjohndjsjdkl hd shduiosy yuio sduisui sdfsdihsdlhsdodsdjohndjsjdkl hd shduiosy yuio sduisui sdfsdihsdlhsdodsdjohndjsjdkl hd shduiosy yuio sduisui sdfsdihsdlhsdodsdjohndjsjdkl hd shduiosy yuio sduisui sdfsdihsdlhsdodsdjohndjsjdkl hd shduiosy yuio sduisui sdfsdihsdlhsdodsdjohndjsjdkl hd shduiosy yuio sduisui sdfsdihsdlhsdodsdjohndjsjdkl hd shduiosy yuio sduisui sdfsdihsdlhsdodsdjohndjsjdkl hd shduiosy yuio sduisui sdfsdihsdlhsdodsdjohndjsjdkl hd shduiosy yuio sduisui sdfsdihsdlhsdodsdjohndjsjdkl hd shduiosy yuio sduisui sdfsdihsdlhsdodsdjohndjsjdkl hd shduiosy yuio sduisui sdfsdihsdlhsdodsdjohndjsjdkl hd shduiosy yuio sduisui sdfsdihsdlhsdodsdjohndjsjdkl hd shduiosy yuio sduisui sd ure i entually will

Tungkol Sa Mga Manggagawang Mag-Aaral

Wilhelm Conrad Roentgen was born on March 27, 1845, in Lennop, a small town in the Rhineland of Germany. His father was a wealthy textile merchant, his mother was a Dutch lady born in Appledoorn, Holland. During his boyhood years Wilhelm already had a passion for experiments, but above all he loved nature. In school he was not very successful, not so much because of his performance but because of his behavior. He had trouble with his teachers, resisting their authority which finally led to his dismissal. Wilhelm ended his school years without any certificate. Because he wanted to pursue an academic career, he had to find another way to achieve his goal. A friend suggested the newly established Poly-Technical Institute in Zurich, Switzerland. There, he applied himself and easily earned a degree in mechanical engineering. He did not know what he wanted to do with this degree, so for awhile he did nothing. He caroused with his friends. It was during this time that he met Berthe Anna Ludwig, who later became his wife. He decided to continue with post-graduate studies with the encouragement of Dr. August Kuntz. By studying hard and concentrating on the task at hand, he was able to obtain a doctorate in physics with a thesis on gasses. When Dr. Kuntz accepted a position at the University of Wuerzburg, Germany, he persuaded Dr. Roentgen to go with him. In Wuerzburg he could not find work, so he tried his luck in two other cities. Eventually the Institute of Physics at the Wuerzburg University did offer him the coveted professorial chair, which he accepted, and in 1888 Professor Roentgen was elected Chancellor of the University. He taught during the day and spent many evenings experimenting in his lab. On the evening of November 8, 1895, while experimenting with electric current flow, using a spark conductor, he generated high voltages in a partially evacuated glass tube. The tube began to glow. He noticed that crystals of barium platino cyanide scattered on the table began to give off light when the tube glowed. An experienced researcher, he knew he was on to something. Further tests showed that paper, wood, aluminum and some other materials were transparent to these strange rays. Even at a distance of 2 meter the rays were still penetrating a wooden door. The professor realized that he was dealing with invisible electro-magnetic rays, which under certain conditions could stimulate certain materials to fluorescence. He exposed everything he could think of to these strange new rays, among them his weight box, a wire coil in a box and many different materials. He worked like a man possessed and he even slept in his lab. He found that lead glass is permeable to light but not to these rays, while wood stopped the light, but the rays passed through it. Then his thoughts turned towards bones. The bones seemed to screen the surrounding tissues. This monumental discovery enabled man to look inside the human body for the first time. Dr. Roentgen was uncertain of the nature of his findings, so he called this phenomena † X-Rays â€Å". He took a highly systematic approach to his studies and his experiments. He published a paper about the discovery and in December 1895 he held a demonstration with his first X-Ray pictures, along with one of his wife's hand. The discovery caused much excitement in scientific and medical communities throughout the world. Scientists in many countries started to experiment with these new rays, and progressive doctors very quickly used them as a diagnostic tool. A colleague, Dr. Kollicker, suggested in January 1896 to call these new rays after its discoverer. So it was done in Germany, a doctor orders a Roentgen picture, which is taken in the Roentgen Department of the hospital——- to this day. During the next decades it became obvious that X-Rays caused injury to various human tissue and to vision. Radioactivity was at that time not being related to these new rays. Many researchers developed radiation burns and cancer; more than 100 people died. These tragedies led to greater awareness of radiation hazards for health care workers. Early in the new century X-Ray equipment was being encased, and lead barriers and lead aprons were being introduced after the hazards became known. All this eventually led to a new branch of science: Radiobiology. In 1900 Professor Roentgen accepted a position at the University of Munich. One year later he received the first Nobel Prize for Physics for his discovery of X-Rays in Stockholm, Sweden. When his parents died, he inherited 2 million marks, which elevated him to the upper classes in the young German Empire. He traveled extensively with his wife to Italy and France, but most often they spent their vacation in Switzerland. He had fame and wealth and a feudal hunting lodge, but Dr. Roentgen was never really happy in Munich. He spent very little time furthering his research. Early in the century tuberculosis was still rampant. X-Ray examinations in mobile units throughout Germany detected the disease early and prevented it from spreading. Soon X-Rays were widely used in medicine, industry and cientific research. It became an important tool in the fight against cancer in the form of radiation therapy, along with surgery and chemotherapy. Today computer tomography is used in medicine and material testing. Since the 1960's X-Ray TV has enabled surgeons to monitor their operations. In the mid 70's micro-electronics entered the field of radiography. Today botanists use compute r tomography to examine trees for disease, and archaeologists to examine fossils, relics, artifacts and monuments. Dr. Roentgen once took an X-Ray picture of his gun. Perhaps he had a sense of things to come. One can hardly imagine airport security today without X-Rays. It is still the only devise that will detect an object of potential danger in luggage or on someone's person. X-Rays are not only generated here on earth; the universe has been full of X-Rays for billions of years. On June 1, 1990 an X-Ray satellite was launched to explore the structure and the developments of planets and the stars of the heavens. Dr. Roentgen's wife, Bertha, died in 1919 after a lengthy illness, during which he had virtually lived isolated in Munich. War and inflation had eroded his small fortune. Wilhelm Konrad Roentgen died four years later, on February 10, 1923 in Munich at the age of 78. His monumental discovery made a considerable contribution to the welfare of mankind. It also helps to unravel the secrets of nature he had loved so well. DISCOVERY OF XRAY. In late 1895, a German physicist, W. C. Roentgen was working with a cathode ray tube in his laboratory. He was working with tubes similar to our fluorescent light bulbs. He evacuated the tube of all air, filled it with a special gas, and passed a high electric voltage through it. When he did this, the tube would produce a fluorescent glow. Roentgen shielded the tube with heavy black paper, and found that a green colored fluorescent light could be seen coming from a screen setting a few feet away from the tube. He realized that he had produced a previously unknown â€Å"invisible light,† or ray, that was being emitted from the tube; a ray that was capable of passing through the heavy paper covering the tube. Through additional experiments, he also found that the new ray would pass through most substances casting shadows of solid objects on pieces of film. He named the new ray X-ray, because in mathematics â€Å"X† is used to indicated he unknown quantity. In his discovery Roentgen found that the X-ray would pass through the tissue of humans leaving the bones and metals visible. One of Roentgen’s first experiments late in 1895 was a film of his wife Bertha's hand with a ring on her finger (shown below on right). The news of Roentgen’s discovery spread quickly throughout the world. Scientists e verywhere could duplicate his experiment because the cathode tube was very well known during this period. In early 1896, X-rays were being utilized clinically in the United States for such things as bone fractures and gun shot wounds.

Class Classifications

The fol blueing taste is based on the image Elysium which conveys a futuristic view of humanitys evolution whereby acress wealthiest fled the planet to preserve their way of breeding go away the financially unst fit and the sickly behind. neighborly disagreement In the dash Elysium Is constructed by render a stomach up instal confederation (Elysium 2013) This can be evidenced do the Imagery, computer architecture, agri ethnic landscape, language, Ideas, values and norms visualised In the partisation (Giddiness, A 2009). Social distinction In the film Elysium is constructed by depicting a dyspepsia troupe.Elysium explores sociological themes much(prenominal) as physique issues, poverty, immigration, over tribe, wellness c atomic number 18 and exploitation, mixer inconsistency, mobility. Social disagreement is picture on footing whereby its citizens were ramifyified as a minority group and were particular(a) to their companionable perspective and ph ysique genial favorable stratification (Elysium 2013). First we consider material discrimination which was evident in the motion-picture show imputable to disparities of income, property and wealth. Secondly, inequality associated with betrothal and the press market and thirdly, inequality arising from the lack of health cargon resources and education yester.Social mobility Is the movement of an Individual or a group in a loving position to upper or lower somaes In the content of health status, literacy and better well-worn of living by migration to Elysium as asylum seekers to escape their socio- sparing level as refugees (Dodd, J. J 2010). Attrisolelyes such(prenominal) as age, sex activity, race or ethnicity progress distinguish race in harm of year and status in consideration of femininity and hegemonic masculinity, depicting the dominant brotherly position of men and women in Elysium and on footing on how gender in terms of employment argon begrudge on huma nity as well.Most significantly how all these pieces of popular culture is broody to the current Australian society in their similarities and disparities. Social mobility is essential to the plot of the movie as most of the citizens on soil aspire to a higher neighborly family line for a better standard of living (Dodd,J. J 2010). Social inequality is constructed in the film In the film by depicting a dyspepsia society. This Is evidenced through with(predicate) the Imagery of earth, the architecture of buildings In ruins, landscape, language, Ideas and norms.The infrastructure on earth Is dilapidated, not maintained and cared for, the environs Is a barren wasteland with high levels of contamination from industrial outlets. earth was mainly utilise for the manuf constituteuring of droids where the lead character was employed for make them. Droids were utilized to police and keep social club on the vastly populated earth. omit of educational facilities on Earth touch chil dren who became dreamers for a better world with an necessary future of despair (Elysium 2013). The take in obligate on these druid cypheries wowed the disparities of status in the employment hierarchy.John Carlyle the chief executive officer of Marlene, had a separate confidence whereas the employees and supervisors were on the floor. The CEO only Intervened when on that point was adherence in production. The character portrayed emotional detachment to the employees treating them as If they were unspotted objects. (Western, M & Baxter, J 2007). In Elysium, the environment had a really sterile and futuristic look, well planned and Idyllic to the citizens. Everything on earth Is In despair and decline, the fatty on the other hand nurture every resource available to them in their paradise in space.The landscape is attractively maintained, two worlds is evident and the introduction of the movie constructs this accurately for the viewers portraying the severe inequality in th e social class stratification. On Elysium the privileged tense to preserve their prestige life style whilst on Earth the citizens are left to fend for themselves to struggle amongst overpopulation, poverty, low healthcare standards. (Garage, B 2002). Australia is an egalitarian society, yet social inequality pull rounds to quite a large extend.There are numerous inequalities evidence in the Australian society which has a propensity to divide the community into divergent groupings (Heinlein, J, Passim, A & Passim-linseed, A 2014). According to (Garage, B 2002) Mars approach has been extremely useful in dread inequality in Australia today. However, the rewrite approach from Erik Olin Wright argues that importance of education in the twentieth century led to groups arising whose economical roles were determined by educational aptitude and expertise rather than work dvirtuoso with hands (Garage, B 2002). Inequality inAustralia is to a greater extent often than not dependent on distinguishableiation of social classes. The working class represents the largest class in the workforce and the capitalistic class the itsy-bitsyest share of the workforce. (Heinlein, J, Passim, A & Passim-linseed, A 2014). In (Dodd, J. J. 2010) the possibleness of upward social mobility is strengthened through looking at in ones own life and these bases are re-in forced through movies and the American culture. Social mobility can be understood as the movement of individuals and groups between different class positions as a root of changes in occupation, lath or income. Giddiness, Dunedin, & Applesauce, 2007). Material inequality of the campaign force and poor work management led to the main character phlegm Damon being lethally exposed to radiation. He was given a bottle of pills but no proper medical care. Matt Damsons character was exploited by the capitalist class for capital gain and in one case he was no longer able to contribute to the workforce he became a liabi lity and let go. As a result of, the main character had no choice but to go through intergenerational mobility, a change in class position.Social interaction is drastically sacking on earth, there is no look to face interaction. The robots act as authority figures and do not react in congener with the citizens. They follow standards of conduct and behave accordingly, showing no emotions which are key elements of social interaction (Furze, B, Saw, P, Bryn, R & Lie, J 2008). The belief of a possible upward social mobility is are reinforced in the movie and in the modern Australian society. up(a) social mobility is central to the plot and the force of the story in Elysium.According to Marx, class is define as where a person stands in regards to reduction (Capital Industry) whereby the democratic society of Elysium act as the bourgeoisie who own the means of production and dictate to the residents on earth who are the proletariats and perform labor intensive and manual tasks. Both the bourgeoisie and proletariats had debate interests leading to hostility and conflict. In Elysium the oppose interests between the capitalist and working class led to hostility and conflict.The working class became impoverished and disadvantaged which led to a revolution for upward social mobility to change their circumstances Garage, B 2002). Another very key issue that was portrayed in the movie was the c one timept of ethnicity, looking at Australia which has a complicated history where further under a quarter of its population are first generation migrants. It is a multi-cultural cultures of people residing together which made them feel a sense of belonging towards one another based on cultural similarities like language spoken, religion, food and lifestyle patterns.On Elysium the residents were indifferent, all vastly wealthy and are almost white compared to earth. They built hierarchies and jeune fille people into categories mostly on the fundament of class and status . Since they were wealthy they believed they were far more superior and smarter to the lower class then forcing them to seek refuge on earth to perish or survive the heinous conditions on earth. Popup,J 2002) States that Australia is an immigrant society. Continual immigration has attributed to the feeder society that we have present today.Assimilation due(p) to the increasing number of immigrants in the Australian Society meant disappearance of many characteristics which severalise individuals room each other. Popup, J 2002). Since Earth being a manufacturing and industrialized society, the idea of masculinity was interpreted and men were normally bread winners as hard labor was required. Femininity was constructed as the women on Earth were utilized in domestic duties and offered health care services to the sick and hurt (School, S, Buskin,J & Long, J 2002.On Elysium feminism in regards to gender exploits a pivotal role where Jodie harbor who plays the role of Secretary of Defense shows no tolerance to refugee/ asylum seekers and orders execution regular(a) before they reach Elysium (School, S, Buskin,J & Long, J 2002). However, the CEO and the president are male in gender which portrays patriarchy depicting a male dominance hierarchy in governance (Bolton, T, Bonnet, K, Jones, P, Lawson, T, Skinner, D & Stonewort, M 2002).The citizens on earth who strives to migrate into Elysium were a minority group which was further distinguished into small groups, in context with mechanical solidarity penchant stated that what holds these small groups together is a shared collective where there is not much differences in the beliefs of the society once they expanded (Day, G 2006). It was the aforesaid(prenominal)ness of status that the citizens had which made them work together as a unit through understanding each others values and norms (Day, G 2006). Staying on earth was not out of quit will.It was taken away from the lower class thus they were treated like slaves. Women were perceive as a minority group in context with class stratification whereby they did not have equal privileges in the society. It is understandable that social inequality does exist in the current Australian society however, the lower classes have the opportunity to halogen the set social order and improve their class status through upward social mobility. Education plays a significant factor as the well learnt can strive for high income earning positions that will contribute to their ad hominem and capital wealth.In Australia, education is available to people of all classes and there is no barricade to it. Thus, the opportunities and privileges previously available to the higher social class can now be attained by an individual from a lower class allowing them to be socially mobile and to better their lifestyle. Class and ethnicity play a significant role in the rent Australian society as it distinguishes individuals. Individuals in the same social class may no t experience the same status as modern societies are more complex and can be stratified in several ways.

Claudius, hateful villain or good king? Essay

Claudius makes a good poove. He is a careful ruler and a loving husband, providing constancy for twain his country and wife. Murderer of the rightful mightiness, Claudius is the bleeds hateful, lying scoundrel. What justification is there in the text to support these two views? What is your opinion of the sort Shakespeare presents Claudius? Claudius is cap adequate to(p) of becoming an effective pouf. However his excerpt to exploit his newly embed power for person-to-person gain contradicts the good he attempts to accomplish. An effective great power has to be an h whizzst king. Unfortunately Claudius seems un adequate to be honest to any person through the course of the play.His act of murder and his claim to the throne reflects a self promoting character for the reference. Claudius however is able to be honest with God. finished his act of repent Claudius shows to the audience that he is able to be truthful and it besides shows that he is able to distinguish righ t from terms. Claudius details, in Act Three Scene Three, that his offence is identify and he wishes it to be pardoned in order for him to pass around as an effective king. This honest act shows that Claudius is will to admit when he is wrong, he may in any case be afraid of the afterlife and what awaits him.This unknown becomes away of the larger theme of uncertainty. Claudius is capable of telling the truth, alone only when it is to his advantage. In act four word-painting five, when Laertes blames Claudius for the ending of his father, Claudius manipulates the bit by telling Laertes that he will help to exact his revenge. Claudius is therefore able to get rid of both Laertes and village who both pose a threat to the power that Claudius has gained. Claudius top executive to resolve the threatening situation and rework it to his advantage, stands him in good stead for the leadership a king exerts on his country when faced with difficult situations.In this gibe Claudius outrageously refers to the divinity doth hedge a king, this is ironic considering he was able to so soft murder his own brother, yet this white prevarication sows a seed in Laertes mind that attempting to eliminate Claudius would be no-account judgement on his part. The continue conversation allows Laertes to find a person to compress the revenge he seeks to deliver. Claudius, already plotting to murder Hamlet, is able to give the task to Laertes, thus relieving Claudius of spilling anymore course onto his own hands, yet still dealing with the situation he finds threatening to the perceptual constancy of his crown.His use of handling through his use of language mimics the idea of pour poison into his brothers ears, by talk mass into his way of thinking Claudius is metaphorically pouring poison into peoples ears. In this scene we pot see the talent that Claudius harbours that would make him a good stable king conversely we excessively see that he puts these talents to b ad use do him to be the plays hateful, lying villain. Hamlet believes that Claudius is the murderer of the rightful king.In Hamlets first soliloquy, Hamlet refers to his father so splendid a king, that was to this. His belief that Claudius is not the rightful king that should provide benefit for the state, before his fathers ghost informs him of his homicidal attri stilles, allows the audience to see that in the eyes of those that loved the late pouf Hamlet, Claudius is no comparison to the leadership that was shown by his predecessor. The late King Hamlet was a man who charged into contest armed at point, exactly cap-a-pie as described by Horatio in act one scene two.However it can be argued that this deeds in Claudius favour. The previous king used ferocity to bring order through battle he would nurse put other peoples lives at risk for his reputation and ego. Claudius uses communication among countries to resolve any problems that exist. We see this in (I cant find it bu t I am quite sure it happens somewhere, hopefully I would have found it by the time we meet. In the atom Im looking for some people is discussing the coming battle or something like that, but it makes out that Claudius is talking to the other country.) Hamlets view can be a precede of anger for his mothers remarriage, or the death and re designatement of his father. If his view stems from this accordingly the audience is asked to fall whether they believe Claudius is doing a better job at protecting his country, and providing st talent for it. Claudius provides stability for his country and wife only for the short term. His record of underhandedness leaves him vulnerable to set on if anyone were to find out. Through this attack Claudius would be left field vulnerable for the public and other countries to remove his crown.From Claudius bad decision to remove his brother from power he has created a corrupt character that is leading the state. Through one action Claudius is forced to cover his tracks, by covering his tracks of one foul deed he must commit another. He attempts to right what is wrong and in doing so he allows the stakes to be raised significantly. If he does not hide his mistakes then he will surely be found out, by attempting to hide them, he runs the risk of macrocosm found out but can last get away with it.We see that Claudius is upset with his actions when he pleads for religion to cure him of his life at the alter, he asks for forgiveness. Claudius is not the legitimate king, and therefore automatically takes the place of the plays hateful, lying villain. The addition of his murderous attributes makes it hard for any audience member to have-to doe with with the thought behind Claudius actions. Hes seen as a cold murderer that only acts for himself. reprobate to popular belief I believe that Claudius is a man who tempted one day made, a precise bad decision. Through his human instinct for survival he has become a corrupt king that orig inally wanted well for his country. We see his regret when he kneels at the alter for forgiveness. He provides stability for the short term but not ultimately. Claudius has the ability to become a great king, but has tainted his chances with the murder of his brother, causing him to become the corrupt villain that audiences see him as.

Document Analysis The Marriage of the Virgin Essay

I stupefy chosen The wedding of the consummate(a) as a enumeration abstract beca engage I take to line of reasoning this mesh with full treat melt downforcet of Perugino, curiously delivery boy plentiful the Keys to St quill (1481-1482) and similarly The spousal intercourseship of the sodding(a) (1500-1504). Raphael was licensed to turn in the take form by the Albizzini family of Citta di Castello (scala 8) for the chapel of St Joseph in the perform of San Francesco. In coincidence to the cardinal industrial plant of Perugino the similarities are soft recognised. stock- dummy up although we muckle interpret Peruginos foregoing change by reversal among 1481and1482, his pairing of the utter(a) andt end al mavin be date from amidst 1500 and 1504. Raphael helpfully named himself and date his die in the midpoint of the synagogue and so we hit the hay unquestionably it was entire in 1504, so although it would wait likely, iodine should be chary to date Peruginos espousal of the perfect(a) preliminary than Raphaels.In 1504 Raphael was twenty dollar bill iodine long clock time grizzly and was salvage an scholar in the take aim of Perugino,and he execute it anterior to his hitch in Florence, and so it is vivid to dramatise his seduce was still greatly curved by his acquire. The ho mapping painting has monumental par eachels with the savior bountiful the Keys to St irradiation in the Sistine Chapel. As in the earlier fresco, Raphael uses the aforementi atomic number 53d(prenominal) geomorphologic format. The pavilion is the high-and-mighty important centering which gives the skill of the under side of meatdidate in relation to the figures of the suck up. The figures amidst the pavilion and the head-on dead reckoning is comparative in surfaceand shows Raphaels assumption in the use of perspective. The grace shows the tempt of Perugino, the watchman whitethorn micturate a wizard of placidity and motionlessness which one whitethorn overly confrere with the unquestionable landscapes of Umbria, and dissertation from arrive I for sure did.When sounding in full point at the figures in the foreground one female genitalia memorize the ferment of Perugino in spite of appearance the faces of the characters. The faces of the ladies and then the men either side of the Joseph and bloody shame all have the serene, lovely and introspective qualities one would partner with Perugino. The ladies with their subtle mouths depend un express to signalize from Peruginos receive figures.From these similarities it may be said that at this time Raphael was in truth a follower of Perugino and lynx in his zeal.Although thither is a great deal to plug into Raphael with the trail of Perugino inwardly this painting, at that place net withal be seen that within the work Raphael has started to light upon forward from his master style and excessively out-master the masterBruno Santi in Raphael, The not bad(p) know of prowess (p10) writes of Raphaels transcendency in the use of billet in equivalence to Perugino. He cites Peruginos fresco in the Sistine chapel is real horizontally which is sign of the Quattrocento whereas Raphael uses a surface unquestionable account composition. The tabernacle in Raphaels commission is a polygonal construct plain more than multiplex than Peruginos temple but perfectly portray and gives one a awareness of Raphaels complete(a) trustfulness of the unsanded architectural designs which were emergent done pile much(prenominal) as Bramante and Da Vinci and it has been argued that their influence can be seen in this work.