AS Chemistry 1
... We can picture the hydrogen atom — the simplest of all atoms with one electron and one proton in the nucleus — by considering a pea placed in the centre of a football pitch, to represent the nucleus with its proton. On this scale the electron will revolve in a circular orbit round the goalposts. Bet ...
... We can picture the hydrogen atom — the simplest of all atoms with one electron and one proton in the nucleus — by considering a pea placed in the centre of a football pitch, to represent the nucleus with its proton. On this scale the electron will revolve in a circular orbit round the goalposts. Bet ...
Isolation and Characterization of Protease Inhibitors from Animal
... inhibitors with notable sequence resemblance to known serine proteases have been separated (Yanes et al. 2005). The majority of these H. medicinalis serine proteases are found in different leech trypsin inhibitor families. However, other inhibitors are similar to other families. For instance, the 3, ...
... inhibitors with notable sequence resemblance to known serine proteases have been separated (Yanes et al. 2005). The majority of these H. medicinalis serine proteases are found in different leech trypsin inhibitor families. However, other inhibitors are similar to other families. For instance, the 3, ...
Cliffs Notes
... Technical Editor: Christopher Bushee Production Proofreader: Joel K. Draper Hungry Minds Indianapolis Production Services ...
... Technical Editor: Christopher Bushee Production Proofreader: Joel K. Draper Hungry Minds Indianapolis Production Services ...
1.09 MB / 64 pages
... Whether you can predict that a substance will be soluble in water by looking at its line formula depends to some extent on how the formula is actually written. For example, the line formula C2H6O, does not tell you how the atoms are connected, so the best you can do is predict that the molecule will ...
... Whether you can predict that a substance will be soluble in water by looking at its line formula depends to some extent on how the formula is actually written. For example, the line formula C2H6O, does not tell you how the atoms are connected, so the best you can do is predict that the molecule will ...
Part 1-ICHO-21-25
... numeric results in the original solutions showed to be obviously not correct. Although the numbers of significant figures in the results of several solutions do not obey the criteria generally accepted, they were left without change. ...
... numeric results in the original solutions showed to be obviously not correct. Although the numbers of significant figures in the results of several solutions do not obey the criteria generally accepted, they were left without change. ...
44. Find рН of formic acid solution with mass percent ω=5
... 15. Calculate mass percent of calcium carbonate in solution if molar concentration of the equivalent is 0,05 mol/L. 16. Calculate masses of water and iodine needed to prepare 500 g of 10% solution. 17. Determine mass of sodium tetraborate needed to prepare 500 ml of solution with molar concentratio ...
... 15. Calculate mass percent of calcium carbonate in solution if molar concentration of the equivalent is 0,05 mol/L. 16. Calculate masses of water and iodine needed to prepare 500 g of 10% solution. 17. Determine mass of sodium tetraborate needed to prepare 500 ml of solution with molar concentratio ...
Malonate decarboxylase of Pseudomonas putida is composed of
... volume of the gradient being 500 ml. The 2-ml fractions were taken at a £ow rate of 30 ml h31 . To the combined active fractions (40 ml), ammonium sulfate was added to achieve 50% saturation. The resulting precipitate was dissolved in the bu¡er A (6 ml) and put on a column (2.5U120 cm) of Sephadex G ...
... volume of the gradient being 500 ml. The 2-ml fractions were taken at a £ow rate of 30 ml h31 . To the combined active fractions (40 ml), ammonium sulfate was added to achieve 50% saturation. The resulting precipitate was dissolved in the bu¡er A (6 ml) and put on a column (2.5U120 cm) of Sephadex G ...
Synthesis of novel dendrimers having aspartate grafts and their
... 3.3. Characterization of Methotrexate–dendrimer solubility profiles Methotrexate is one of the prototype folate antagonist cytotoxic drugs used in non-malignancy and non-malignant diseases. The molecule is made up of a heterocyclic portion (a 2,4-diaminosubstituted pterine ring) linked to an aminoben ...
... 3.3. Characterization of Methotrexate–dendrimer solubility profiles Methotrexate is one of the prototype folate antagonist cytotoxic drugs used in non-malignancy and non-malignant diseases. The molecule is made up of a heterocyclic portion (a 2,4-diaminosubstituted pterine ring) linked to an aminoben ...
Peer-reviewed Article PDF
... of 437 amino acid residues are organized into two main subunits, each consisting of 20 alpha-helices. These alpha helices compose approximately 75% of citrate synthase’s tertiary structure. Between these two subunits, a single cleft exists containing the active site. Two binding sites can be found t ...
... of 437 amino acid residues are organized into two main subunits, each consisting of 20 alpha-helices. These alpha helices compose approximately 75% of citrate synthase’s tertiary structure. Between these two subunits, a single cleft exists containing the active site. Two binding sites can be found t ...
Novel Methods and Materials in Development of Liquid Carrier
... Back in 1999, my alternative civilian service approaching its end, I was looking for a job. For some innate reason I was focusing pharmaceutical industry only. I have to admit that at that time I already had a very ambitious wish to continue my education carrier within the frame of PhD studies in th ...
... Back in 1999, my alternative civilian service approaching its end, I was looking for a job. For some innate reason I was focusing pharmaceutical industry only. I have to admit that at that time I already had a very ambitious wish to continue my education carrier within the frame of PhD studies in th ...
Entropy and Free Energy
... • For a given substance, the standard entropy is greater in the liquid phase than in the solid phase. [Compare the standard entropies of Na(s) and Na(l).] This results from there being greater molecular motion in a liquid, resulting in many possible arrangements of atoms in the liquid phase; wherea ...
... • For a given substance, the standard entropy is greater in the liquid phase than in the solid phase. [Compare the standard entropies of Na(s) and Na(l).] This results from there being greater molecular motion in a liquid, resulting in many possible arrangements of atoms in the liquid phase; wherea ...
Chapter 6 Quantities in Chemical Reactions
... approximately 16 u. The ratio of the mass of an oxygen atom to the mass of a hydrogen atom is therefore approximately 16:1. If we have 2 atoms of each element, the ratio of their masses is approximately 32:2, which reduces to 16:1—the same ratio. If we have 12 atoms of each element, the ratio of the ...
... approximately 16 u. The ratio of the mass of an oxygen atom to the mass of a hydrogen atom is therefore approximately 16:1. If we have 2 atoms of each element, the ratio of their masses is approximately 32:2, which reduces to 16:1—the same ratio. If we have 12 atoms of each element, the ratio of the ...
Grade XII Unit 1 - Ethiopian Ministry of Education
... throughout. i.e., it has no visible boundaries because the components are mixed as individual atoms, ions and molecules. For example, when a spoonful of sugar dissolves in water you obtain a homogeneous mixture. A heterogeneous mixture has one or more visible boundaries between the components. Thus, ...
... throughout. i.e., it has no visible boundaries because the components are mixed as individual atoms, ions and molecules. For example, when a spoonful of sugar dissolves in water you obtain a homogeneous mixture. A heterogeneous mixture has one or more visible boundaries between the components. Thus, ...
as a PDF - CiteSeerX
... Analysis of the Time Course of Pepsinogen Activation—Pepsinogen was activated at various concentrations at pH 2.0, and the activation process was analyzed by SDS-disc gel electrophoresis (Fig. 1). In all cases, pepsinogen disappeared rapidly after acidification. The resulting protein species were de ...
... Analysis of the Time Course of Pepsinogen Activation—Pepsinogen was activated at various concentrations at pH 2.0, and the activation process was analyzed by SDS-disc gel electrophoresis (Fig. 1). In all cases, pepsinogen disappeared rapidly after acidification. The resulting protein species were de ...
Westwood High School Lesson Plans
... o Place each can of soda into a large beaker/containers so students can see whether the can floats or sinks o Why is one can floating and the other sinking? One can is floating and the other is not because while they both have the same volume, one can weighs more than the other due to the sugar co ...
... o Place each can of soda into a large beaker/containers so students can see whether the can floats or sinks o Why is one can floating and the other sinking? One can is floating and the other is not because while they both have the same volume, one can weighs more than the other due to the sugar co ...
2nd Semester Practice Chemistry Final 2009
... a. less effective in solids than in liquids. c. equally effective in gases and in liquids. b. more effective in gases than in solids. d. more effective in liquids than in gases. 44. Which term best describes the process by which particles escape from the surface of a nonboiling liquid and enter the ...
... a. less effective in solids than in liquids. c. equally effective in gases and in liquids. b. more effective in gases than in solids. d. more effective in liquids than in gases. 44. Which term best describes the process by which particles escape from the surface of a nonboiling liquid and enter the ...
engineering chemistry
... 'atomos', meaning 'unable to be cut'. The original meaning of atom was the smallest, indivisible form of a chemical particle. Now we know how to divide atoms into sub-atomic particles, the definition of an atom includes the concept that the particle must retain its chemical properties. ATOM An Atom ...
... 'atomos', meaning 'unable to be cut'. The original meaning of atom was the smallest, indivisible form of a chemical particle. Now we know how to divide atoms into sub-atomic particles, the definition of an atom includes the concept that the particle must retain its chemical properties. ATOM An Atom ...
Stoichiometric Calculations
... This approach only works when comparing two gases in a formula. It cannot be used to compare a gas to a liquid or solid. [ * at STP conditions: 1 x 22.4 L + 3 x 22.4 L → 1 x 22.4 L + 2 x 22.4 L ...
... This approach only works when comparing two gases in a formula. It cannot be used to compare a gas to a liquid or solid. [ * at STP conditions: 1 x 22.4 L + 3 x 22.4 L → 1 x 22.4 L + 2 x 22.4 L ...
chapter 15: answers to selected problems
... 15.6 We obtain 92 molecules of ATP when we break down one molecule of myristic acid. In Sample Problem 15.5, we found that breaking down myristic acid requires 6 beta oxidation cycles and produces 7 molecules of acetyl-CoA: 6 cycles of beta oxidation produce 6 NADH + 6 FADH2 7 citric acid cycles pro ...
... 15.6 We obtain 92 molecules of ATP when we break down one molecule of myristic acid. In Sample Problem 15.5, we found that breaking down myristic acid requires 6 beta oxidation cycles and produces 7 molecules of acetyl-CoA: 6 cycles of beta oxidation produce 6 NADH + 6 FADH2 7 citric acid cycles pro ...
PDF Full-text
... the microelectrode when the adsorbent consisted of PS microbeads with a SPG-modified surface. A different protein immobilization method involves using a protein implanted with a ligand that acts as a tag [9]. The tag consisted of a continuous sequence of seven to eight histidine residues and could b ...
... the microelectrode when the adsorbent consisted of PS microbeads with a SPG-modified surface. A different protein immobilization method involves using a protein implanted with a ligand that acts as a tag [9]. The tag consisted of a continuous sequence of seven to eight histidine residues and could b ...
PFK - ePrints USM
... (ultrafiltration) chromatography, affinity chromatography and anion exchange chromatography. The purification of ATP-PFK from L.antarcticum yielded 2.85 mg of purified PFK enzyme at a purification fold of about 1.3 with specific activity of 5.92 mU/mg and recovery of 7 %. The ATP-PFK activity of L.a ...
... (ultrafiltration) chromatography, affinity chromatography and anion exchange chromatography. The purification of ATP-PFK from L.antarcticum yielded 2.85 mg of purified PFK enzyme at a purification fold of about 1.3 with specific activity of 5.92 mU/mg and recovery of 7 %. The ATP-PFK activity of L.a ...
IIT-JEE (Advanced) - Brilliant Public School Sitamarhi
... Silver salt method : (for organic acids) Basicity of an acid : No. of replacable H+ atoms in an acid (H contained to more electronegative atom is acidic) Procedure : Some known amount of silver salt (w1 gm) is heated to obtain w2 gm of while shining residue of silver. Then if the basicity of acid is ...
... Silver salt method : (for organic acids) Basicity of an acid : No. of replacable H+ atoms in an acid (H contained to more electronegative atom is acidic) Procedure : Some known amount of silver salt (w1 gm) is heated to obtain w2 gm of while shining residue of silver. Then if the basicity of acid is ...
Calculations with Chemical Formulas and Equations
... • By definition, this is the mass of 1 mol of a substance (i.e., g/mol) – The molar mass of an element is the mass number for the element that we find on the periodic table – The formula weight (in amu’s) will be the same number as the molar mass (in g/mol) Stoichiometry ...
... • By definition, this is the mass of 1 mol of a substance (i.e., g/mol) – The molar mass of an element is the mass number for the element that we find on the periodic table – The formula weight (in amu’s) will be the same number as the molar mass (in g/mol) Stoichiometry ...
Chapter 3 Stoichiometry: Calculations with Chemical
... • By definition, this is the mass of 1 mol of a substance (i.e., g/mol) – The molar mass of an element is the mass number for the element that we find on the periodic table – The formula weight (in amu’s) will be the same number as the molar mass (in g/mol) Stoichiometry ...
... • By definition, this is the mass of 1 mol of a substance (i.e., g/mol) – The molar mass of an element is the mass number for the element that we find on the periodic table – The formula weight (in amu’s) will be the same number as the molar mass (in g/mol) Stoichiometry ...
Size-exclusion chromatography
Size-exclusion chromatography (SEC) is a chromatographic method in which molecules in solution are separated by their size, and in some cases molecular weight. It is usually applied to large molecules or macromolecular complexes such as proteins and industrial polymers. Typically, when an aqueous solution is used to transport the sample through the column, the technique is known as gel-filtration chromatography, versus the name gel permeation chromatography, which is used when an organic solvent is used as a mobile phase. SEC is a widely used polymer characterization method because of its ability to provide good molar mass distribution (Mw) results for polymers.