VOL 20 NO 157 REGD NO DA 1589 | Dhaka‚ Saturday‚ June 22 2013 Top of Form Bottom of Form http://www.fe-bd.com/index.php?ref=MjBfMDZfMjJfMTNfMV8yN18xNzM5MDE= Commodity exchange and volatile kitchen market Published : Saturday‚ 22 June 2013 Changing economic environment‚ increasing commodity uses through value addition at different stages‚ raising the number of market participants‚ evolving demand and supply positions of agricultural commodities and growing international
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The Compound Light Microscope Commonly binocular (two eyepieces)‚ the compound light microscope‚ combines the power of lenses and light to enlarge the subject being viewed. Typically‚ the eyepiece itself allows for 10X or 15X magnification and when combined with the three or four objective lenses‚ which can be rotated into the field of view‚ produce higher magnification to a maximum of around 1000X generally. The compound light microscope is popular among botanists for studying plant cells‚ in
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Compound Light Microscope The familiar compound light microscope is a series of lenses (hence "compound") that focus visible light in such a way as to produce a magnified image. A single lens‚ often called a magnifying glass‚ cannot generally magnify images as much as a series of lenses although Antony van Leeuwenhoek‚ the first microbiologist‚ used a simple‚ albeit exquisitely crafted‚ lens to discover single-celled "animalcules‚" as he called them. Advantages: Basic compound light microscopes
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WHAT IS PHARMACOGNOSY? Pharmacognosy is the study of drugs of natural origin. The term comes from two Greek words: "pharmakon" meaning drug or medicine‚ and "gnosis" meaning knowledge. The American Society of Pharmacognosy defines pharmacognosy as "the study of the physical‚ chemical‚ biochemical and biological properties of drugs‚ drug substances or potential drugs or drug substances of natural origin as well as the search for new drugs from natural sources". Plant preparations are said
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Compound 50‚ like its known analogue 3‚ involves an α‚β-unsaturated ketone‚ an acid-sensitive reactant‚ which prevents its direct synthesis in presence of protic solvents by refluxing. Despite of this characteristic‚ 50 was formed smoothly in 5 minutes by grinding chemistry‚ solely as E-isomer‚ without any evidence of decomposition after 1H and 13C MNR analysis. This synthetic approach provides easy access to such α‚β-unsaturated N-acylhydrazones‚ which are building blocks in the synthesis of nitrogen-containing
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13. ORGANIC CHEMISTRY IV) ALKYNES SYNOPSIS Alkynes are commonly known as acetylenes. Acetylene is the simplest and important member of the alkyne series. • Alkynes contain – C ≡ C – • General molecular formula of alkynes is CnH2n–2 • Triple bonded carbons are ‘sp’ hybridized and greater s – character is associated with it. • Alkynes will exhibit chain‚ position and functional isomerism. • Their functional isomers are alkadienes and cyclo alkenes. • The minimum number of carbons required to exhibit
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together Wavelength: the distance between similar points along a wave Compound light microscope: is an optical instrument comprised of more than one lens and uses light to illuminate the object under study Electron microscope: can provide magnifications in the vicinity of 1 to 2 million power Cell: is a fundamental anatomic until in which all life is contained 2. List and describe the features of four different types of compound light microscopes. Bright field Microscope: Field is bright wit
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People like to eat organic food‚ they think organic food is good for their health. And they think organic food is better for environment and kind of animals. So‚ nowadays people are trying to buy an organic food‚ it make organic food increasing price. On the other hand‚ many experts say that the organic foods are better than other. 1. What Qualifies as Organic? For the last time the organic product very important for people who like to eat organic food but now all organic foods are grown and
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Covalent Compound: Cocaine Cocaine‚ also known as coke‚ is a covalent compound‚ which are molecules that consist of groups of atoms held together by covalent or coordinate bonds. In the United States cocaine is an illegal drug because of the harm it does to a human’s body. It has been used for many years for many different reasons by many different people. Cocaine and it’s leaves‚ which are found on the plant of the Erythroxylen coca (cocaine.org)‚ originated by the South American Indians who have
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1Organic Architecture View Full Essay Worldwide notoriety is a comment that would suggest Frank Lloyd Wright and the architecture that he left behind. This legendary American architect started a style of organic structures that remains a roadmap for the people of his genera today. His greatness not only remains by the buildings that he left behind‚ but through his school that he along with his wife started and his philosophy about designing. As a young child‚ Wright developed these characteristics
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