2016 Chemistry Examination Paper
... Dihydromatricaria acid (DHMA), a colourless liquid excreted by soldier beetles, has several potential medical applications. The structural formula of DHMA is shown below: O HO ...
... Dihydromatricaria acid (DHMA), a colourless liquid excreted by soldier beetles, has several potential medical applications. The structural formula of DHMA is shown below: O HO ...
2014_S4_CHM_NORMAL (ALL)
... 53. Element X (atomic number 11) reacts with element Y (atomic number 16) to form an ionic compound. Each atom of X loses one electron and each atom of Y accepts two electrons to form a compound with formula X2Y. 54. Consider the following information: ...
... 53. Element X (atomic number 11) reacts with element Y (atomic number 16) to form an ionic compound. Each atom of X loses one electron and each atom of Y accepts two electrons to form a compound with formula X2Y. 54. Consider the following information: ...
CHAPTER 21 NONMETALLIC ELEMENTS AND THEIR COMPOUNDS
... hygroscopic). Thus, most of the white solid is NaHCO3 plus some Na2CO3. ...
... hygroscopic). Thus, most of the white solid is NaHCO3 plus some Na2CO3. ...
Reduces cholesterol induced atherosclerotic lesions in aorta artery
... Vinegar has been proved to have some medical uses and some potential protective effects on atherosclerosis. In this study, effects of vinegar on various risk factors of atherosclerosis and development of atherosclerosis in hypercholesterolemic rabbit have investigated. Rabbits were assigned to four ...
... Vinegar has been proved to have some medical uses and some potential protective effects on atherosclerosis. In this study, effects of vinegar on various risk factors of atherosclerosis and development of atherosclerosis in hypercholesterolemic rabbit have investigated. Rabbits were assigned to four ...
Ch21 Conversion of Amino Acids to Specialized Products
... to alterations in the cellular heme pool caused by fluctuating demands for heme proteins. In contrast, heme synthesis in erythroid cells is relatively constant, and is matched to the rate of globin synthesis. The initial reaction and the last three steps in the formation of porphyrins occur in m ...
... to alterations in the cellular heme pool caused by fluctuating demands for heme proteins. In contrast, heme synthesis in erythroid cells is relatively constant, and is matched to the rate of globin synthesis. The initial reaction and the last three steps in the formation of porphyrins occur in m ...
Ch. 24
... • With the exception of hydrogen, the nonmetals are concentrated in the upper right-hand corner of the periodic table • Compounds formed by a combination of metals with nonmetals tend to be ionic, having a metallic cation and a nonmetallic anion. Copyright McGraw-Hill 2009 ...
... • With the exception of hydrogen, the nonmetals are concentrated in the upper right-hand corner of the periodic table • Compounds formed by a combination of metals with nonmetals tend to be ionic, having a metallic cation and a nonmetallic anion. Copyright McGraw-Hill 2009 ...
Porphyrin Metabolism & Porphyrias
... Cytochrome P450s (CYPs) are actually a superfamily of related, heme-containing monooxygenase enzymes that participate in abroad variety of reactions. This system performs different functions in two separate locations in cells. ...
... Cytochrome P450s (CYPs) are actually a superfamily of related, heme-containing monooxygenase enzymes that participate in abroad variety of reactions. This system performs different functions in two separate locations in cells. ...
Experimental skills and abilities
... The reaction between the solutions. The reaction in Procedure 2 occurred faster because, in solutions, the particles are able to move relative to one another. This allows them to collide more frequently with one another, causing the reaction to occur ...
... The reaction between the solutions. The reaction in Procedure 2 occurred faster because, in solutions, the particles are able to move relative to one another. This allows them to collide more frequently with one another, causing the reaction to occur ...
Unit 4 Notes - heckgrammar.co.uk
... called acetyl coA. The CO2 diffuses through the mitochondrial and cell membranes by lipid diffusion, out into the tissue fluid and into the blood, where it is carried to the lungs for removal. The hydrogen is taken up by NAD again. 8. The acetyl CoA then enters the Krebs Cycle, named after Sir Hans ...
... called acetyl coA. The CO2 diffuses through the mitochondrial and cell membranes by lipid diffusion, out into the tissue fluid and into the blood, where it is carried to the lungs for removal. The hydrogen is taken up by NAD again. 8. The acetyl CoA then enters the Krebs Cycle, named after Sir Hans ...
Skeletal muscle substrate metabolism
... in muscle cells is poorly understood. In resting muscle there is some indication that the glucose ± fatty acid cycle (Randle cycle) is operative, however under conditions of exercise the mechanism of regulation is currently debated.15 A possible regulation could also occur through malonyl-CoA. The i ...
... in muscle cells is poorly understood. In resting muscle there is some indication that the glucose ± fatty acid cycle (Randle cycle) is operative, however under conditions of exercise the mechanism of regulation is currently debated.15 A possible regulation could also occur through malonyl-CoA. The i ...
ISOAMYLASE FROM PSEUDOMONAS AMYLODERAMOSA
... the accession number ATCC 21262. P. amyloderamosa SB-15 is a Gram-negative, nonsporulating, rod-shaped bacterium, which grows under aerobic conditions. The growth is optimal at 25-30oC and pH 6.5-7.5. P. amyloderamosa is a naturally-occurring soil microorganism, which secrets isoamylase into its ext ...
... the accession number ATCC 21262. P. amyloderamosa SB-15 is a Gram-negative, nonsporulating, rod-shaped bacterium, which grows under aerobic conditions. The growth is optimal at 25-30oC and pH 6.5-7.5. P. amyloderamosa is a naturally-occurring soil microorganism, which secrets isoamylase into its ext ...
A-level Human Biology Question Paper Unit 01 - The Body
... Alpha-1-antitrypsin is a protein that reduces the activity of enzymes that can damage lung tissue. Cigarette smoke contains hydrogen peroxide. Hydrogen peroxide reduces the activity of alpha-1-antitrypsin. Scientists investigated the effect of different concentrations of hydrogen peroxide on the act ...
... Alpha-1-antitrypsin is a protein that reduces the activity of enzymes that can damage lung tissue. Cigarette smoke contains hydrogen peroxide. Hydrogen peroxide reduces the activity of alpha-1-antitrypsin. Scientists investigated the effect of different concentrations of hydrogen peroxide on the act ...
View
... Ammonia is produced by all tissues during the metabolism of a variety of compounds, and it is disposed of primarily by formation of urea in the liver. However, the level of ammonia in the blood must be kept very low, because even slightly elevated concentrations (hyperammonemia) are toxic to the cen ...
... Ammonia is produced by all tissues during the metabolism of a variety of compounds, and it is disposed of primarily by formation of urea in the liver. However, the level of ammonia in the blood must be kept very low, because even slightly elevated concentrations (hyperammonemia) are toxic to the cen ...
Pathophysiology of Skeletal Muscle
... hours. Therefore, exercise is one of the most effective ways to prevent metabolic syndrome and type II diabetes mellitus. Malignant hyperthermia. In genetically predisposed individuals carrying, e. g., allelic variants of Ca2+ release channel, volatile anesthetic agents and succinylcholine may cause ...
... hours. Therefore, exercise is one of the most effective ways to prevent metabolic syndrome and type II diabetes mellitus. Malignant hyperthermia. In genetically predisposed individuals carrying, e. g., allelic variants of Ca2+ release channel, volatile anesthetic agents and succinylcholine may cause ...
Hydrogen Bonding - Chemwiki
... Note: If you are interested in the bonding in hydrated positive ions, you could follow this link to co-ordinate (dative covalent) bonding. The diagram shows the potential hydrogen bonds formed to a chloride ion, Cl-. Although the lone pairs in the chloride ion are at the 3-level and wouldn't normal ...
... Note: If you are interested in the bonding in hydrated positive ions, you could follow this link to co-ordinate (dative covalent) bonding. The diagram shows the potential hydrogen bonds formed to a chloride ion, Cl-. Although the lone pairs in the chloride ion are at the 3-level and wouldn't normal ...
Respiratory question - Sinoe Medical Association
... E. the exchange of chloride ion for hydrogen ion that occurs in the lungs ...
... E. the exchange of chloride ion for hydrogen ion that occurs in the lungs ...
Chemistry JAMB Past Questions
... deposited on the cathode of CuSO4 cells. The weight of AgNO3 cell during the same period would be [Cu = 63, Ag –108] A. 0.54 g B. 1.08 g C. 1.62 g D. 2.16 g 3.24 g In the reaction Fe + Cu2+ Fe2+ + Cu, iron displaces copper ions to form copper. This is due to the fact that ...
... deposited on the cathode of CuSO4 cells. The weight of AgNO3 cell during the same period would be [Cu = 63, Ag –108] A. 0.54 g B. 1.08 g C. 1.62 g D. 2.16 g 3.24 g In the reaction Fe + Cu2+ Fe2+ + Cu, iron displaces copper ions to form copper. This is due to the fact that ...
Nitric oxide cell signaling: S-nitrosation of Ras superfamily GTPases
... many cell types including endothelial and vascular smooth muscle cells, by cytokine stimulation [33,34]. 3. In vivo nitrosative cell signaling One of the best characterized targets of NO is the heme of guanylate cyclase. Nitrosation of guanylate cyclase leads to activation of the second messenger, c ...
... many cell types including endothelial and vascular smooth muscle cells, by cytokine stimulation [33,34]. 3. In vivo nitrosative cell signaling One of the best characterized targets of NO is the heme of guanylate cyclase. Nitrosation of guanylate cyclase leads to activation of the second messenger, c ...
Porphyrins (Structure of Porphyrins)
... porphyrins can be ordered around the tetrapyrrol nucleus in four different ways designated by Roman numerals I & IV. Only type III Porphyrins which contains asymmetric substitution on ring D are physiologically important in humans. ...
... porphyrins can be ordered around the tetrapyrrol nucleus in four different ways designated by Roman numerals I & IV. Only type III Porphyrins which contains asymmetric substitution on ring D are physiologically important in humans. ...
Chapter 6 - Sites @ Suffolk University
... This simple and useful concept of gram molecular mass is often abbreviated to the term "mole," which conjures up images of furry animals in the minds of the uninitiated. Most often, for instance, chemists will say that water has 18 grams per mole. There is a technical problem with the use of this te ...
... This simple and useful concept of gram molecular mass is often abbreviated to the term "mole," which conjures up images of furry animals in the minds of the uninitiated. Most often, for instance, chemists will say that water has 18 grams per mole. There is a technical problem with the use of this te ...
High Temperature Corrosion of Stainless Steels in Low Oxygen
... providing knowledge about the corrosion attack/mechanism. In order to better understand the complex corrosion reactions that occurred in the field exposures, laboratory exposures were performed in more simplified and well-controlled environments. Since H2 and H2O can be found in many energy systems, ...
... providing knowledge about the corrosion attack/mechanism. In order to better understand the complex corrosion reactions that occurred in the field exposures, laboratory exposures were performed in more simplified and well-controlled environments. Since H2 and H2O can be found in many energy systems, ...
Involvement of Endogenous Retroviruses in Prion Diseases
... ERV expression has been reported and has emerged as a possible etiological factor in complex diseases [36–38]. In the mouse, a number of ERVs are still active, and those with infectious counterparts, such as MuLV and MMTV, have been notably studied for decades. Several lines of evidence show that, i ...
... ERV expression has been reported and has emerged as a possible etiological factor in complex diseases [36–38]. In the mouse, a number of ERVs are still active, and those with infectious counterparts, such as MuLV and MMTV, have been notably studied for decades. Several lines of evidence show that, i ...
Structure, catalytic activity and evolutionary relationships of 1
... the first time in ripening tomato in 1979. This enzyme is responsible for the conversion of S-adenosyl-L-methionine to 1-aminocyclopropane-1-carboxylic acid, which is the key step of ethylene synthesis in higher plants. The role of this enzyme (especially in the fruit ripening) was demonstrated in 1 ...
... the first time in ripening tomato in 1979. This enzyme is responsible for the conversion of S-adenosyl-L-methionine to 1-aminocyclopropane-1-carboxylic acid, which is the key step of ethylene synthesis in higher plants. The role of this enzyme (especially in the fruit ripening) was demonstrated in 1 ...
C:\SUBJECTS\SUBJECTS\Chemistry
... yeast and in the absence of air X is converted to compound Y in the absence of air, X is converted to compound Y and colourless gas. Compound Y reacts with sodium metal to produce a gas Z which gives a ‘pop’ sound with a glowing splint. Y also reacts with ethanoic acid to give a sweet smelling ...
... yeast and in the absence of air X is converted to compound Y in the absence of air, X is converted to compound Y and colourless gas. Compound Y reacts with sodium metal to produce a gas Z which gives a ‘pop’ sound with a glowing splint. Y also reacts with ethanoic acid to give a sweet smelling ...