solution has more hydroxide ions (OH-)? a. Basic 12. What does it mean if a solution is neutral? a. The concentration of hydronium equals the concentration of hydroxide ions. 13. Explain the pH scale and how it is used to indicate acidic‚ alkaline‚ and neutral solutions. 14. What does it mean in terms of strength when the pH of an acid changes from 5 to 4? Part II: For the following questions‚ provide your response in short-answer format (2–3 detailed sentences each). Use this Phase’s
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MALE REPRODUCTION MALE REPRODUCTIVE PHYSIOLOGY Testis - 2 compartments: interstitial tissue containing the Leydig cells that synthesize and secrete testosterone and the seminiferous tubules that produce spermatozoa and contain Sertoli cells Leydig cells and testosterone synthesis - Leydig cells mainly produce testosterone - T is a prohormone for synthesis of estradiol (vs. aromatase) and DHT (via. 5-alpha-reductase) - many effects of T are mediated via estradiol (esp in
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solution to determine whether it is acidicor alkaline. The indicator will change colour depending on whether an acid or an alkali is added. The colour in red cabbage (it is a pigment called an anthocyanin) makes a very good indicator. Acids and alkalis Acids have a sour taste‚ like vinegar (which contains ethanoic acid) and lemons (which contain citric acid). Alkalis are substances that react with acids and neutralise them. Soap and washing powder are alkaline. Acids and alkalis are found in a surprising
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Ferrous sulfate and sodium thiosulfate Bacterium (acid envi.) + Sodium thiosulfate à H2S gas H2S + Ferric ions à Ferrous sulfide (black precipitate) Phenol red (ph indicator) Alkaline slant/Alkaline butt (K/K) NO FERMENTATION NOT MEMBERS OF ENTEROBACTERIACEAE Stab and Streak GLUCOSE FERMENTATION ONLY Alkaline slant/ Acid butt (K/A) 18-24 hrs incubation Acid slant/ Acid butt (A/A) 8-12 hrs incubation Acid slant/ Acid butt(A/A) 18-24 hrs incubation LACTOSE (SUCROSE) FERMENTATION
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to DNA analyzis‚ to question human or animal. 2)Human origin – ABA Card – hema trace‚ to look for 2 lines for human‚ 1 for animal * Examination for semen. 1) chemical test- acid phosphatase and P30 found in very high levels of semen 2) microscopic exam – take small portion of the item if acid phosphatase found in the area and use under microscope and stain the slide * Examination for saliva: never able to 100% confirm so we check for a part – amalyaze 1) chemical test- amylase‚ phadebas
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Muscle adaptations to the increase in energy demands at the start of exercise Introduction The transition from rest to exercise is associated with a huge upsurge in energy expenditure‚ due primarily to skeletal muscle contractions (Connett & Sahlin‚ 1996). Contractions require energy in the form of adenosine tri-phosphate (ATP). ATP stores in muscle are around 8mmol/l and are exhausted within 2s of exercise (Connett & Sahlin‚ 1996). To continue exercise and maintain ATP homeostasis‚ ATP
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Acid Rain Acid rain is polluted rain. The pollutants go up to the atmosphere and when it rains it brings the pollution down with it. Sulfur dioxide and nitrogen oxide are the gases that form the acid rain. When these gases mix with moisture it can make rain‚ snow‚ hail‚ or even fog. The scientific term for acid rain is acid deposition which means when the acid is taken from the air and is deposited on the earth. Major industries‚ coal burning factories‚ power plants and automoble engines
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or alkaline the pH level is. For instance when the rate starts of low on pH 4 (0.2) and starts to gradually increase. However it only increases until pH 5 (0.29)‚ from that point‚ the rate decreases at pH 6 (0.116). Therefore the rate for pH 6 is an anomaly‚ as it does not follow the trend of the graph‚ by continuing to gradually increase‚ instead it decreases. According to my prediction‚ this rate is theoretically supposed to increase until pH 7‚ and then decrease again as it gets alkaline‚ however
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IUBMB Life‚ 53: 85–98‚ 2002 Copyright c 2002 IUBMB 1521-6543/02 $12.00 + .00 DOI: 10.1080/10399710290038972 Review Article Structural Basis of Perturbed pKa Values of Catalytic Groups in Enzyme Active Sites Thomas K. Harris1 and George J. Turner2 Department of Biochemistry and Molecular Biology‚ University of Miami School of Medicine‚ Miami‚ Florida 2 Department of Physiology and Biophysics and the Neurosciences Program‚ University of Miami School of Medicine‚ Miami‚ Florida 1 Summary
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the process whereby a substance is broken down by reacting it with water. Esters are hydrolysed by acid hydrolysis or alkaline hydrolysis. Acid hydrolysis involves boiling the ester with dilute aqueous acid (H2SO4 or HCl) while the latter involves boiling the ester with an aqueous alkali (KOH or NaOH). The products of acid hydrolysis are an alcohol and carboxylic acid. Alkaline hydrolysis yields a salt (called the salt of the acid) and the alcohol that formed the ester. Both types of hydrolysis
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