Title: Investigation of Induction Time of lac operon in E. Coli with IPTG‚ and Comparision of the Amount Beta-galactosidase produced with Lactose‚ IPTG and Antibiotic. Abstract: Introduction: An operon is a group of genes that are arranged side by side with a regulatory gene. It also includes a promoter gene‚ operator gene‚ structural genes. Regulatory genes control transcription with positive or negative signal. (Jacob‚ and Monod‚ 1961) A positive signal‚ inducer‚ would stimulate
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Beta blockers (β-blockers or BBs) were invented and designed by Sir James Black‚ who was a Nobel Prize winning scientist. Black designed beta blockers to counteract stimulated adrenergic effects. He demonstrated that‚ by blocking the cardiac beta-receptors‚ these agents could cause inhibitory effects on the sinus node (chronotropic effect)‚ atrioventricular node (dromotropic effect)‚ and on myocardial contractility (inotropic effect).1 It is important to note that not all beta receptors (β-receptors)
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located in Mexico‚ the Mexico stock market index‚ and the world market index‚ together with the standard deviations (SD) of returns and the expected returns ( R ). The risk-free rate is 5%. 1. Compute the domestic country beta of Telmex as well as its world beta. What do these betas measure? 2. Suppose the Mexican stock market is segmented from the rest of the world. Using the CAPM paradigm‚ estimate the equity cost of capital of Telmex. 3. Suppose now that Telmex has made its shares tradable internationally
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Calculating Beta for Compuware Corporation Financial websites tend to calculate beta on securities differently for publicly traded companies. Beta is merely an estimable measure of an assets’ risk in relation to the market. Because each website has their own underlying assumptions‚ they compute beta to have different values. In some cases‚ the variance in beta is as large as 0.50. To find out what underlying assumptions websites used to compute their betas‚ we performed a series of regression
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Beta adrenergic receptor antagonists (Beta Blockers) For several years‚ CHF treatment involved drugs with sympathomimetic properties. This was based on the belief that heart failure is fundamentally a disorder of reduced stroke volume and cardiac output. Long-term use of sympathomimetics was expected to improve clinical outcomes based on relief obtained from short term use of dopamine and dobutamine. Under this model‚ the use of beta adrenergic receptor antagonists was believed to be counterintuitive;
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Beta-Galactosidase and Western Blot 0 1. EMG 9 and EMG 26 contain strain _lac-_(I- Z+ Y+) and strain _lac -_ (I+ Z- Y-)respectively.Three genes huddled together on the chromosome are required for two strains of _E.coli_ to utilize lactose.Consisting of three genes‚ namely‚ _lacZ_‚ _lacY_ and _lacA_‚ the _lac_ operon orderly handles these genes to code specific enzymes necessary for the metabolism of lactose. The genes _lacZ_‚ _lacY_ and _lacI_ would code for beta-galactosidase‚ galactosidase permease
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digestive enzyme found in the intestines of mammals. Beta-galactosidase is an enzyme that initiates the breakdown of the substrate lactose. Lactose is a disaccharide sugar found in milk. It is composed of two rings. The rings contain 5 carbon atoms and an oxygen atom. Attached to the carbon atoms are a hydrogen atom and an OH group or another carbon. The rings are bound together by an oxygen bridge. This bridge can be broken when the enzyme Beta-galactosidase binds to lactose and a water molecule
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problem we are studying was to determine the cellular damage of various concentrations of propanol‚ ethanol‚ methanol‚ NaCL‚ and sodium dodecyl sulfate henceforth known as SDS on Beta vulgaris to ultimately distinguish the ability of each solution to permeate the membrane of the Beta vulgaris. • Beta vulgaris contains a beta cyanin which is a water-soluble red-pigment‚ which remains in a healthy vacuole surrounded by the tonoplast membrane. When we damage the tonoplast membrane and thus disrupt the
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A) Long-acting beta agonist: Beta-agonists (Beta2-agonists) are the medications that affect smooth muscles surrounding airways.1 In an irritated state of lung‚ muscles around the airways are constricted; these kinds of drugs can influence these muscles and make them relaxed‚ which brings about widening of airway and leads to comfortable breath (“easier breathing”1).1 They are categorized into two subtypes according to their duration time of action‚ including long-acting and short-acting. They can
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htm Exploring Stability of Systematic Risk: Sectoral Portfolio Analysis Ibrahim A.Onour Arab Planning Institute‚ Kuwait E-mail: onour@api.org.kw or ibonour@hotmail.com Abstracts Results in this paper support evidence of time-varying systematic risk (beta coefficients) for five sectors‚ their securities are traded in Kuwait Stock Market. The paper indicates banks‚ and real estate sectors exhibit relatively wider range of systematic risk variation compared to the other sectors. As higher volatility in
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