ipl-logo

Selenium Research Paper

909 Words4 Pages

NEED FOR THE PROJECT Selenium (Se) is a chemical element with atomic number 34. It is a nonmetal with properties that are intermediate between the elements above and below in the periodic table. It is an important microelement, exists in small quantity in microorganisms, plants, animals and humans. It is an essential trace nutrient important to humans and most other animals and act as anti-aging, repairing cells, improving human immunity and preventing carcinogenesis but toxicity occurs when taken in large quantity. It is also a basic component of various enzymes such as glutathione peroxidase (GSH-Px) and thioredoxin reductase (TR), which involve in the antioxidant protection of cells (Rotruck et al., 1973; Birringer et al., 2002). Deficiency …show more content…

However, toxicity of Se came into limelight after the tragedy of Kesterson wild-life Refuge and Reservoir in San Joaquin Valley in California in 1980, which gave this element a worldwide concern (Winkel et al., 2012). Information of Se in plants is important because plants are the main dietary source for human beings and animals. Selenium resembles to sulfur in chemical properties, both have similar transporting and assimilating pathway taken up inside the plants. (Dumont et al., 2006). Certain species of plants require high levels of selenium to flourish and are considered indicators of high selenium content of the soil. The main Se indicator plants are prince's plume (Stanleya sp.), woody asters (Xylorhiza sp.), Astragalus species (including some locoweeds), and false goldenweed (Oonopsis sp.) (Gregory and Vadim, 2004). Inside the plants, Se is transported through sulfate transporters which are present in the plasma membrane of root cells. Through sulfur metabolic pathway it is assimilated to organic Se and volatilized as DMSe (Dimethylselenide) and DMDSe (Dimethyldiselenide) into atmosphere. ( Meetu and Shikha,

Show More
Related

  • Pt1420 Unit 4 Research Paper

    78 Words  | 1 Pages

    Write 9-4x^2-x+2x^4 in standard form You first look at all the the numbers in the polynomial and see which coefficient has the highest number exponent. (the degree) which is 2x^4. Then you keeping descending down so -4x^2 would be next. Then you look at the numbers and variables in the problem, all you have left is 9 and -x you always put the variable first so it would be -x, then 9. So your answer would be

    Read More

  • Unit 10 P1 Research Paper

    650 Words  | 3 Pages

    P1 Explain the issues organisations must consider when planning computer systems maintenance The issues that organisations must consider when planning a computer system are as follow; Employee and Employer Responsibilities - It is the Cortex’s’ responsibility to make sure the employee is allowed to have scheduled breaks when they require them. As part of their contract they also have to provide the employee with the correct ergonomic equipment so they can do their job and work efficiently, this means that the employee is more effective and reliable when working from their desk as they have the correct equipment. Employees also have a responsibility this is making sure they use the business network entirely for work related purposes and not for downloading anything that infringes the contractual agreement they have in place this is known as the Acceptable Usage Policy. Cortex is also protected by the Computer Misuse Act.

    Read More

  • Unit 4 M2 Research Paper

    960 Words  | 4 Pages

    M2 - Explain the fundamental principles which have been applied to the designs I have created an interactive HCI which has a lot of colours, I have made sure the colours used don’t clash and that they are easy on the eye for everyone, so the black writing on the blue background can be read easily without any Struggle. The buttons down the left hand side of the page are perceived as being together because they are all the same size, they all rectangle shaped and the text is all the same size apart from the language changer as the text is too big for the box size.

    Read More

  • Unit 2 Mineral Research

    945 Words  | 4 Pages

    Minerals 1. The minerals under the DRI for my age group would be calcium, potassium, sodium, copper ,iron, magnesium, phosphorous, selenium, and zinc. The mineral that comes below the DRI would be be potassium. However, it is not more than 80% below the DRI. However I did have a low potassium intake.

    Read More

  • Zinc Research Paper

    217 Words  | 1 Pages

    This element is a transition metal in group 12. Zinc is a family of cadmium (Cd), mercury (Hg), and copernicium (Cn), even though they are found in same row and they have things in common they also have different properties. Zinc’s mass is 65. some of the colors are bluish-silver, white, and bluish-green Zinc has many use. Zinc is used for metal coating rust protection, nickel , steel iron and many other things.

    Read More

  • Nt1310 Unit 1 Exercise 2

    402 Words  | 2 Pages

    Vitamin B12 (Cobalmin) is a water soluble vitamin and plays a key role in the normal functioning of the brain and nervous system, and in the formation of red blood cells. Vitamin B12 deficiency can occur if the body does not absorb enough vitamin B12 from the gastrointestinal tract or when there is not enough dietary intake of the vitamin. One common cause of deficiency is as a result of pernicious anaemia which is an autoimmune disorder that results in inflammation and damage to the stomach lining, and loss of parietal cells. The parietal cells produce intrinsic factor, a protein needed for absorption of Vitamin B12 in the gut.

    Read More

  • Gallium Research Paper

    147 Words  | 1 Pages

    Gallium is a silvery-blue color and soft metal. Solid Gallium is brittle and a worse electrical conductor than lead. It is near the non-metals on the periodic table. In its solid state, Gallium fractures conchoidally, meaning the fractured surfaces are curved like a shell. It has an atomic mass of 69.723.

    Read More

  • Secondary Active Transport

    848 Words  | 4 Pages

    Endodermal cells surrounding the xylem actively transport salts into the lumen using a H(+)-ATPase carrier protein (Lee et al., 2004). This lowers the lumens water potential and water now moves in down this gradient by the process of osmosis. This creates a force that helps to move water up the plant which is known as root pressure (Toole, G. and Toole, S., 2008) [3]. However the inward movement of water, as stated above, is an example of secondary active transport as the water is moving down a gradient that was set up by the original active transport of the salt that moved up

    Read More

  • Advantages And Disadvantage Of Heavy Metals

    1197 Words  | 5 Pages

    Heavy metals had taken a great attention in scientific studies throughout the past years. In this generation, the amount of toxic materials found in land and water as well as in air has increased drastically. Constant development on modern technology depends on usage of heavy metals. Incorporated with this, heavy metals have major disadvantages of being toxic and having a long half-life. ( Godt, Scheidig, and Grosse-Siestrup et al, 2006; Gunduz and Akman, 2012; WHO, 1995; WHO, 2004) Cadmium, chromium and lead, among other heavy metals are known to be dangerous pollutants in our environment.

    Read More

  • Avocados Case Study

    432 Words  | 2 Pages

    2. Improve the resistance framework. Glutathione, which may be a solid antioxidant, removes dangerous

    Read More

  • Susan Sullivan Vitamin A Summary

    521 Words  | 3 Pages

    The article, "Vitamin A", is written by Susan Sullivan, who is the associate director of the University of Maine. Vitamin A is a major nutrient associated with healthy skin and eyes, growth, and immune system function. It is essential for reproduction and the growth of children. Ms. Sullivan writes about the different forms, symptoms of deficiency, toxicity, and the history of vitamin A. The article main purpose is to provide information on the importance of vitamin A to your body if you follow the United States National Academy of Medicine's recommendation of dietary allowance.

    Read More

  • To What Extent Does Glucose 6-Phosphate Dehydrogenrase

    218 Words  | 1 Pages

    Glucose 6-phosphate dehydrogenase is the first enzyme in the pentose phosphate pathway. The pentose phosphate pathway is the major pathway cells use to generate NADPH, an important co-enzyme involved in oxidation/reduction reactions. One consequence of glucose 6-phosphate dehydrogenase deficiency is the premature death of red blood cells. This is because the lack of the enzyme leads to insufficient production of NADPH, which is needed to reduce glutathione, an antioxidant that helps protect red blood cells from oxidative stress by eliminating reactive oxygen species. Without glucose 6-phosphate dehydrogenase, reactive oxygen species accumulate which leads to the formation of aggregates of cross-linked hemoglobin and premature death in red

    Read More

  • Hypothyroid Food Research Paper

    568 Words  | 3 Pages

    Various seleno-enzymes are generated in our body after selenium intake. These seleno-enzymes have high antioxidant property; thereby protecting body cell damage. They also assist in converting T4 to T3

    Read More

  • Hexavalent Chromium Research Paper

    318 Words  | 2 Pages

    Chromium is a transitional element, with three stable forms. It is a neutrally charged stable form, but naturally occurs in the environment. Trivalent chromium is a +3 charge stable form of chromium that can be naturally oxidized from its neutrally charged version, occurring in the environment (Mertz et al., 1974; Barrett et al., 1985; Alexander et al., 1990). Hexavalent chromium is a +6 charge stable form of chromium which is the product of industry, and it is very toxic to living things. Hexavalent chromium may be reduced naturally in the environment to the less harmful trivalent chromium.

    Read More

  • Clotting Cascade Case Study

    1075 Words  | 5 Pages

    This vitamin was designated "K" stemming from the German word for coagulation, or blood clotting. Although some Vitamin K is produced by intestinal bacteria, the majority is obtained from dietary sources. The human body requires this vitamin to produce functional blood clotting proteins, in particular Factor II (prothrombin), as well as Factors VII, IX, and X. Each of these proteins is a serine protease, an enzyme that cleaves certain peptide bonds in its target protein(s). As it turns out, these particular clotting factors must bind calcium in order to become fully activated. The ability to bind calcium, in turn, requires that these proteins undergo a modification at certain glutamate residues known as gamma carboxylation.

    Read More

More about Selenium Research Paper

Open Document