Silver essays

Silver essays Of the many elements discovered in the past years, Silver is a species that catches my eye. Silver has been known since ancient times. I love silver because its the only thing I wear when it comes to jewelry, but my love for this element had grown since Ive learned how much more we use silver in our every day lives. A few things that interest me about this element are silver itself, the uses of silver, the compounds that it forms and the uses of those compounds. The first major source of silver was discovered in 4000 B.C. in what we today call Turkey. Pure silver is nearly white. The texture of this element is soft, lustrous, ductile and malleable. Silver is an excellent conductor of heat and electricity. Many of its properties resemble those of gold, copper, lead and zinc. Silver has names in different cultures. The French call it Argent. The German name for it is Silber. The Italian name for silver is Argento and the Spanish name for silver is Plata. Elements usually have symbols that correspond with the name of the element. For example, the symbol for Magnesium is Mg. The symbol for Oxygen is O. Because silver comes from the Latin word Argentum, the symbol for silver is Ag. Silver has an atomic number of 47 with a mass of 107.868. According to the periodic table, silver occurs in group11 and in period 5. This section of the periodic tale is called the Transition Metals. This element usually occurs in the metallic state. The crystal str ucture of silver is face-centered cubic. The density of this element is 10.5 g/cm3 and the atomic volume is 10.3 cm3/mol. Silver melts at 961.93oC and boils at 2212oC. Silver has a hardness of 3.25 mohs. In the nucleus, there are sixty-one neutrons, forty-seven protons and forty-seven electrons. The electronic configuration of silver is [Kr] 4d105s1. The structure of the atom contains 5 shells around the nucleus. There are two electrons in the first shell, eight e ...

Listening Comprehension Strategies

Listening Comprehension Strategies Listening comprehension, also known as oral comprehension, can present a struggle for learning disabled children. Many disabilities can make it difficult for them to attend to information delivered orally, including difficulties in processing sounds and prioritizing sensory input. Even children with mild deficits may simply find auditory learning difficult since some students are visual or even kinesthetic learners. What Disabilities Affect Listening Comprehension? Auditory processing disorder, ADHD or a language-processing deficit can have serious impacts on listening comprehension. These children can hear, but imagine a world in which every noise you heard was at the same volume- its just impossible to sort out the important sounds from the unimportant ones. A ticking clock may be as loud and attention-grabbing as the lesson being taught by the teacher.    Reinforcing Listening Comprehension at Home and School For a child with these kinds of needs, listening comprehension work cant only happen in school. After all, parents will have the same struggles at home. Here are some general strategies for children with auditory processing delays. Reduce distraction. To help regulate volume and keep a child on task, its essential to eliminate extraneous noises and motion. A quiet room can help. Failing that, noise-canceling headphones can do wonders for easily distracted learners.Let the child see you when you speak. A child with difficulty interpreting sounds or making them on her own should see the shape of your mouth as you speak. Let him put his hand on his throat when saying words that present difficulty, and have him look in a mirror while speaking.Take movement breaks. Some children will need a refresher in the struggle to listen. Let them get up, move around, and then return to the task. They may need this support more often than you think!Read aloud, at least 10 minutes a day. You are the best example: Spend time reading aloud one-on-one to kids with auditory deficits. Its important to cater to the childs interests.Help her with the process of listening. Have the child repeat what youve said, summarize what shes read, or explain to you how she will complete a task. This builds the foundation of comprehension. When teaching a lesson, present information in short and simple sentences.Always check to ensure that the child understands by repeating or rephrasing your instructions or directions. Use voice intonation to keep his attention.Whenever possible, use visual aids and or charts. For visual learners, this can make all the difference.Help children with organization by presenting the sequence of the lesson before you teach it. e Reference them as youre giving instructions.Teach strategies to these students that include rehearsing mentally, focusing on keywords and using mnemonics. Making connections when presenting new material can help them overcome the sensory deficit.For students for whom distractibility is not the main issue, group learning situations may help. Peers will often help or direct a child with deficits and lend additional support that will preserve a childs self-esteem.   Remember, just because youve said it aloud doesnt mean the child understands. Part of our job as parents and as teachers is to ensure that comprehension is happening. Consistency is the most effective strategy to support children with challenges in listening comprehension.

Mitochondrial DNA (mtDNA) characteristics and uses Assignment

Mitochondrial DNA (mtDNA) characteristics and uses - Assignment Example DNA sequence determination of the mDNA has been from many organisms including the extinct ones, and the comparison of the sequences outlines the mainstay of phylogenetics. The researchers have therefore been able to elucidate various evolutionary relationships within species. Additionally, the analysis of the relatedness of the populations among organisms has been ascertained and has become vital in the field of anthropology. The human mitochondrion DNA as an example, is commonly present per every cell except in sex cells as elucidated by Brown, George & Wilson, 1979, and is closely related to that of metazoans. The circular double-strand molecule of mDNA has about 15000 to 17000 base pairs and the nucleotide content differentiates the two strands. In animals, the transcribed strand produces molecules of polycistronic RNA. In replication process, the mDNA is replicated by the gamma complex of the enzyme DNA polymerase that is composed of 140 kDa of the catalytic section of the enzyme encoded by the gene POLG and two accessory subunits of 55 kDa encoded by POLG2 gene. During the process of embryogenesis, the mDNA replication is down because it is regulated from the oocyte that is fertilized through the embryo that is pre-implanted. At the stage of blastocyst, Anderson et al, 1981, further exemplifies that onset of the replication of the mDNA is specific to the trophectoderm cells. In contrast, the replication of mDNA is restricted by the inner cell mass cell until they receive signals making them differentiate to specific cell types. In the susceptibility concept, the mDNA does not necessarily accumulate many oxidative base damages than the nuclear DNA. As a result, some other types of the oxidative DNA damage are more efficiently repaired in the mitochondria than in the nucleus. The presence of proteins in the organelle further offers protection just as in the nuclear chromatin. The integrity of

Public Law (Human Rights) Essay Example | Topics and Well Written Essays - 1500 words

Public Law (Human Rights) - Essay Example They are appointed is for six term of office of six years through the term is renewable. The power of the ECJ defined in Article 243. The Member States mainly, but not exclusively, in exercising its jurisdiction under Articles 173, 177 and 228(6).2 The sovereignty of Parliament is the dominant characteristic of our political institutions. Sir. A. V. Dicey expressed it as cornerstone of the constitution and he has introduced of this doctrine of PS. These are: This rule means that the Parliament can make or unmake any law. Parliament may grant independence to dependent states whether dominions or colonies. For example: The Nigeria Independence Act 1960 and The Zimbabwe Independence Act 1979. 2. No Parliament may be bound by its predecessor or bind by its successor: The doctrine of repeal is the idea that supports this theory. Now any Act of Parliament can expressly or impliedly repeal any law. So, this power of Parliament support Dicey's this theory as Parliament is not being bound any Parliament before it. However, by Acts of Union, the law making power of UK and Scotland was merged that was maintained for more than 300 years. Acts of Union and the Grand of independence oppose this theory. This doctrine states that an Act will be accepted by Courts provided it was made by proper procedure. So, no one can question about its validity. But it is seen that citizens' i.e. ... electorates and neighbouring countries can question it. Before 1688 settlement judges proclaim an Act invalid because of its conflicts with a law of higher statues. In Pickin v British Railway Board, Lord Read said that although, previous laws contrary to the law of God or the nature or natural justice can be said to be invalid, The comments of Lord Denning in McCarthy's v Smith, and Lord Diplock in Garland v British Rail Engineering Ltd provides an analogy for arguing that the HRA could be repealed if Parliament wished. It cannot be an entrenched bill of Rights, but where a Sex Discrimination Act 1975 appeared inconsistent with Article 141(then Article119) EC (equal pay). However, HL was able to construe the provision in a manner consistent with Article.3 The influence between of the European court in the development of Community law, and the influence of domestic courts in the development of English law, on the other hand. Lord Diplock's dictum in the GCHQ is testament to the influence of the courts in the development of administrative law. His Lordship stated "English law relating to judicial control of administrative action has been developed upon a case-to-case basis which has virtually transformed it over the last three decades." In Les Verts the Court referred to the Treaty as the ""basic constitutional charter" of the Community and came to the conclusion that, although the Parliament was not mentioned as a possible defendant in Article 173, binding measures adopted by it were subject to judicial review. The Court stated that by Articles 173, 184 and 177 the Treaty intended to establish a complete system of legal remedies. Les Verts is a prime example of dynamic interpretation, an approach typical of the interpretation. The current British position is

Incorporating Farmers Knowledge in International Rice Research Essay

Incorporating Farmers' Knowledge in International Rice Research The longevity of many cultures can be attributed to their adherence to tradition, specifically subsistence practices. More likely than not, trying to push modern technology into these cultures will only result in disaster. Such is the case with the Green Revolution and the rice situation Stephen Lansing covered in The Balinese. It simply does not seem logical to disrupt traditional practices that have supported a culture for so long. There is a reason certain practices have been around for so long and that is because they work the best for certain people in certain locations. Sam Fujisaka supports this notion which is the basis for his article "Incorporating Farmers' Knowledge in International Rice Research." Fujiska's article describes his research done examining traditional farming techniques of the Claveria people of the Southern Philippines, so that their methods of rice farming may be used to improve research of agriculture. This article sets a good example for researchers of more developed countries who study such indigenous cultures. Rather than trying to see which modern technology from the "outside world" will best help these cultures, Fujisaka attempts to learn from these cultures' traditional methods to help improve the farming industry. Fujisaka's study of rice farming in the Philippines is much like Lansing's study in Bali, in that both cultures rely heavily on rice farming and both cultures suffered much the same from the effects of the Green Revolution. Thus, finding what improvements need to be made and how, is an important task that could help many people. Fujisaka began exploring these improvements by interviewing local Clave... ...ys best for everyone. This is a point that is necessary for people (specifically anthropologists) to bring into the light when dealing with other cultures. Understanding as much as possible about a culture is essential before attempting to get involved with their lives and, as Fujisaka shows, before getting their lives involved in others. He concludes "that the knowledge of farmers can be used first to identify and prioritise research issues" (139), and considering the respect for these cultures with which he conducted his research, Fujisaka's study can be considered more sound than most. References Fujisaka, Sam. "Incorporating Farmers' Knowledge in International Rice Research." The Cultural Dimension of Development: IndigenousKnowledge Systems. Ed. Warren, D. Michael et al. 1995 124-139. Lansing, J. Stephen. The Balinese Fort Worth: Harcourt, 1995.

Police Legitimacy Notes Essay

Effectiveness of the police ultimately depends on their legitimacy. – 1st b/c the moral paradox underlying the police use of nonnegotiable coercive force can be resolved only if police actions are qualitatively distinct from other actors’ use of force. – 2nd b/c people tend to obey authority out of respect for its legitimacy more than out of fear of its power. Greater police legitimacy decreases the need for nonnegotiable coercive intervention; it also builds active community support for police efforts. -â€Å"Perceptions of legitimacy carry more weight w/ the public than effectiveness of enforcement. †-Tyler, Tom; 88) – Tyler and Huo (2001): perceived legitimacy of the police and perceived fairness/favorability of outcomes carry equal weight in citizens’ acceptance of officers’ decisions. The amazing transformation of LAPD: 76% of Latinos and 68% of blacks now give LAPD positive grades (LA Times, 2009 poll) Weber- Tragedy of Power â⠂¬â€œ At some point, force is inevitably necessary to preserve peace and social order. GRAHAM v. CONNOR * The police use of force is a perennial reminder of the fundamental imperfection of the tragedy of power. * When all else fails, people call the cops (Egon Bittner) ; this is b/c the police role is ultimately define by their monopoly on the right to use nonnegotiable coercive force. We rely on the police precisely because of this monopoly; yet at the same time, we are repulsed by its underlying harsh reality. †¦Leads Us To Mary-Douglas â€Å"Purity and Danger† * We value dirty work as necessary but are repelled by those who do it so there is a moral ambiguity of force, which means that force is sometime necessary, but the decision to use it and judging the extent of its use are inherently unclear.

Solute Definition and Examples in Chemistry

A solute is defined as the substance that is dissolved in a solution. For solutions of fluids, the solvent is present in greater amount than the solute. Concentration is a measurement of the amount of solute present in a chemical solution, with respect to the amount of solvent. Examples of Solutes Usually, a solute is a solid that is dissolved into a liquid. An everyday example of a solute is  salt in water. Salt is the solute that dissolves in water, the solvent, to form a saline solution. On the other hand, water vapor is considered a solute in air because nitrogen and oxygen are present in much larger concentration levels in the gas. Different Types of Solutes When two liquids are mixed to form a solution, the solute is the species present in the smaller ratio. For example, in a 1 M sulfuric acid solution, sulfuric acid is the solute while water is the solvent. The terms solute and solvent can also be applied to alloys and solid solutions. Carbon may be considered a solute in steel, for example.