what is alpha and beta forms?
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α (Alpha) – the name given to the configuration of a cyclic sugar where the oxygen on the anomeric carbon is on the opposite face of the ring relative to the substituent on the other carbon flanking the ring oxygen. Contrasted with beta (β) which is where the two substituents are on the same faces of the ring.
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Alpha radiation is the name for the emission of an alpha particle in fact an helium nuclei, beta radiation is the emission of electrons or positrons , and gamma radiation is the term used for the emission of energetic photons. ... At that time, nuclei, electrons and photons were unknown.
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Chorionic Gonadotropin alpha/beta (HCG): Products HCG is a heterodimer consisting of an alpha chain and a beta chain. The alpha chain is common to several other hormones, including lutenizing hormone (LH), follicle stimulating hormone (FSH), and thyroid stimulating hormone (TSH), while the beta chain is unique to HCG.
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beta-D-glucose. The alpha and beta isomers differ by the position of an hydroxy group on carbon number 1. ... Optical isomers occur only if the four groups of atoms attached to the central carbon are different. Consider the molecule C, shown on the right.
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Alpha, beta-unsaturated (α,β-unsaturated): A molecule having a pi bond between the alpha and beta carbons adjacent to a carbonyl group. Generic α,β-unsaturated molecule. Methyl vinyl ketone. An α,β-unsaturated ketone.
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Beta Particles As with alpha particles, beta radiation comes from the nucleus of an unstable atom. Betas are electrons, and their mass is much smaller than that of alpha particles -- about 1/8,000th as much.
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Alpha and Beta If the -OH group attached to it is below the ring, the molecule is alpha glucose. If the -OH group is above the ring, the molecule is beta glucose. Since the linear and cyclic forms of glucose inter-convert with each other, alpha glucose can turn into beta glucose and vice versa.
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The most common types of secondary structures are the α helix and the β pleated sheet. Both structures are held in shape by hydrogen bonds, which form between the carbonyl O of one amino acid and the amino H of another. Images showing hydrogen bonding patterns in beta pleated sheets and alpha helices.
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Alpha (α) Taxonomy: This is the very initial phase of taxonomic activity which involves identification, naming, and characterization of biological species. ... The Beta level is the second stage of the activity and involves the morphology and arrangement of these species into further biological categories of same species.
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The alpha helix is formed when the polypeptide chains twist into a spiral. This allows all amino acids in the chain to form hydrogen bonds with each other. ... It allows for more hydrogen bonding by stretching out the polypeptide chain. An example of the beta pleated sheet structure is feathers.
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Difference between Alpha and Beta Testing. Alpha Testing is a type of software testing performed to identify bugs before releasing the product to real users or to the public. Alpha Testing is one of the user acceptance testing. Beta Testing is performed by real users of the software application in a real environment.
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The alpha particle is a helium nucleus; it consists of two protons and two neutrons. It contains no electrons to balance the two positively charged protons. ... Beta particles are emitted by neutron rich unstable nuclei. Beta particles are high energy electrons.
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The alpha particle is a helium nucleus; it consists of two protons and two neutrons. ... Gamma rays are emitted by most radioactive sources along with alpha or beta particles. After alpha or beta emission the remaining nucleus may still be in an excited energy state.
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We now know that beta-particles are electrons and alpha-particles are atomic nuclei of the element helium. Beta-particles are negatively charged while alpha-particles have a positive charge of twice the magnitude. Alpha-particles are more ionising than beta-particles.
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Secondary structure The most common types of secondary structures are the α helix and the β pleated sheet. Both structures are held in shape by hydrogen bonds, which form between the carbonyl O of one amino acid and the amino H of another.
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Alpha particles are positively charged, beta particles are negatively charged, and gamma radiation is electrically neutral . This means that alpha and beta radiation can be deflected by electric fields , but gamma radiation cannot. Remember that opposite charges attract.
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The two most common secondary structural elements are alpha helices and beta sheets, though beta turns and omega loops occur as well. Secondary structure elements typically spontaneously form as an intermediate before the protein folds into its three dimensional tertiary structure.