The following equations have to be applied in order to calculate the number average molecular weight ( Mn )‚ the weight average molecular weight ( Mw ) and the polydispersity index ( PDI ) : _ Mn = ΣNiMi / ΣNi _ Mw = ΣWiMi/ ΣWi = ΣNiMi2 / ΣNiMi _ _ PDI = Mw / Mn The molecular weight of polystyrene repeat unit (CH – CH2 )n is M = 104 C6H5 Using the input data of the 4 monodisperse fractions‚ we create the following table: Sample Wt/m Ni Mi NiMi
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which could resist disasters such as flood and typhoons. With‚ the status of our school and our place here in Camarines Sur‚ we do not have the appropriate place and weather to conduct a similar research. With regards with the National Institute of Molecular Biology and Biotechnology (BIOTECH)‚ the institutions presented an overview of their researchers but not in a detailed way due to time constraints. Included of their researchers were the Virgin Coconut Oil‚ Organic Fertilizers‚ researches on bacteria
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antifreeze solution. 3. Using the formula molar mass = grams/moles calculate the molecular mass of antifreeze in the 10% solution. 4. Using the equation ΔT = Kf m¸calculate the molality of the 20% antifreeze solution. 5. Use the formula molality = moles solute/kg solvent to find the number of moles in 20% antifreeze solution. 6. Using the formula molar mass = grams/moles calculate the molecular mass of antifreeze in the 20% solution. 7. Average the molar masses you calculated
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incubated for 48 h and subjected to agarose gel electrophoresis. DNA ladder characteristic of apoptosis were observed in both cell lines (Fig. 5). No DNA fragmentation occurred in the untreated cells. 3.9. Caspase-3 expression in apoptotic cells The molecular effectors that activate a series of protease that leads to programmed cell death by intrinsic and extrinsic pathways are known as caspases. Caspase-3 dependent apoptotic cell death was induced by Pierisin-6 in human cancer cell lines were . The HeLa
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Agriculture Farming methods were primitive and ineffective in the early part of the Middle Ages. At planting time‚ peasants tossed out seeds and plowed fields. Only few plants grew and yields were low. However‚ people gradually adopted new methods and technology. A new farming method was developed. Improvements in agriculture began in 8th and 9th century CE and became widespread in the year 1000. One advancement was the three-field system‚ a method of crop rotation. On the manor‚ there
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Chemical Bonding and Molecular Structure MCQs: Test - 2 Sr. No. Questions Answers 1. The state of hybridization of the central atom and the number of lone pairs over the central atom in POCl3 are [WB JEE 2012] (A) sp‚ 0 (B) sp2‚ 0 (C) sp3‚ 0 (D) dsp2‚ 1 Answer: (C) 2. NiCl2{P(C2H5)2(C6H5)}2 exhibits temperature dependent magnetic behaviour (paramagnetic/diamagnetic). The coordination geometries of Ni2+ in the paramagnetic and diamagnetic states are respectively
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[LIVMFAP] - [GAD] [2-8]. The heme is used to oxidize drugs by adding a hydroxyl group to these substances‚ often as a way to rid the body of potentially harmful toxins in order to make them more water-soluble. They do this by inserting one atom of molecular dioxygen into an organic substrate (RH) while the second oxygen atom is reduced to water (RH+02 + 2e- → ROH + H20). CYP catalysis substrate binding to the heme site requires a two-electron transfer with NADH-cytochrome P450 oxidoreductase (CPR) to
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nucleic acids and proteins. Electrophoresis can take a mixture of macromolecules of different molecular weights‚ shapes‚ and various electrical charges to determine all the various compounds in the mixture and allowing for further purification that can aid in details of individual elements of the mixture being studied. Agarose gel electrophoresis is a very important technique used in the field of molecular science. The field of forensics utilizes agarose gel electrophoresis by allowing investigators
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MWCO membrane. A possible reason to why none of the of these solutes were able to pass through was because the solutes could have been too big to be transported. According to your results‚ which solute had the highest molecular weight? The solute that had the highest molecular weight was Albumin. Which solute displayed the highest rate of diffusion through the 200 MWCO membrane? The solute that displayed the highest rate of diffusion through the 200 MWCO
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thousands of birds‚ have grown in popularity because they make raising large numbers of livestock easier and more efficient. (“Factory Farms‚ Adverse Effects of.”) The availability of feed and the discovery of antibiotics have both helped factory farming grow as an industry. (“Factory Farms‚ Adverse Effects of.”) Feed has become easier and cheaper to purchase because of the use of synthetic fertilizer and the large numbers of it that are being produced (“Air Quality”). With these advantages though
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