disorders of hemoglobin synthesis
Chapter 099. Disorders of Hemoglobin (Part 1) pptx
... Chapter 099. Disorders of Hemoglobin (Part 1) Harrison's Internal Medicine > Chapter 99. Disorders of Hemoglobin Disorders of Hemoglobin: Introduction Hemoglobin is critical ... stigmata. Hemoglobin Structure Different hemoglobins are produced during embryonic, fetal, and adult life (Fig. 99-1). Each consists of a tetramer of globin polypeptide chains: a pair of α- like ... alter clinical behavior. Function of Hemoglobin To support oxygen transport, hemoglobin must bind O 2 efficiently at the partial pressure of oxygen (P O2 ) of the alveolus, retain it, and release...
Ngày tải lên: 07/07/2014, 04:20
Chapter 099. Disorders of Hemoglobin (Part 2) pdf
... the ability of hemoglobin to deliver more oxygen to tissues at low pH. It arises from the stabilizing action of protons on deoxyhemoglobin, which binds protons more readily than oxyhemoglobin ... Hb Gower II (α 2 ε 2 ). At 10–11 weeks, fetal hemoglobin (HbF; α 2 γ 2 ) becomes predominant. The switch to nearly exclusive synthesis of adult hemoglobin (HbA; α 2 β 2 ) occurs at about 38 ... partially after birth. Genetics and Biosynthesis of Human Hemoglobin Normal red blood cell (RBC) differentiation requires the coordinated expression of the globin genes with the genes responsible...
Ngày tải lên: 07/07/2014, 04:20
Chapter 099. Disorders of Hemoglobin (Part 3) pptx
... biosynthesis) and of structural hemoglobinopathies (e.g., an abnormal amino acid sequence). Hereditary persistence of fetal hemoglobin (HPFH) is characterized by synthesis of high levels of fetal hemoglobin ... life. Acquired hemoglobinopathies include modifications of the hemoglobin molecule by toxins (e.g., acquired methemoglobinemia) and abnormal hemoglobin synthesis (e.g., high levels of HbF production ... Hereditary persistence of fetal hemoglobin persistence of high levels of HbF into adult life V. Acquired hemoglobinopathies A. Methemoglobin due to toxic exposures B. Sulfhemoglobin due to...
Ngày tải lên: 07/07/2014, 04:20
Chapter 099. Disorders of Hemoglobin (Part 4) pptx
... of the complete blood cell count (e.g., profound microcytosis with minimal anemia in thalassemia trait). Detection and Characterization of Hemoglobinopathies—General Methods Of the ... mutant hemoglobins can usually be characterized by more specialized techniques such as isoelectric focusing and/or high-pressure liquid chromatography (HPLC). Quantitation of the hemoglobin profile ... The number of severe cases of thalassemia in the United States is about 1000. Sickle cell disease is the most common structural hemoglobinopathy occurring in heterozygous form in ~8% of American...
Ngày tải lên: 07/07/2014, 04:20
Chapter 099. Disorders of Hemoglobin (Part 5) pps
... C:50% Pathophysiology of sickle cell crisis. Several sickle syndromes occur as the result of inheritance of HbS from one parent and another hemoglobinopathy, such as β thalassemia ... Chapter 099. Disorders of Hemoglobin (Part 5) Sickle Cell Syndromes The sickle cell syndromes are caused by a ... reticulocytes) that are abnormally adherent to the endothelium of small venules. These abnormalities provoke unpredictable episodes of microvascular vasoocclusion and premature RBC destruction...
Ngày tải lên: 07/07/2014, 04:20
The Art of 21 Synthesis Organic
... synthesis (Scheme 16). This accomplishment dem- onstrates the importance of convergency in the total synthesis of complex molecules and is one of the first examples of stereoselective total synthesis ... AIBN I Pd 0 Synthesis of N-heterocycles via lactam-derived ketene aminal phosphates. Asymmetric synthesis of cyclic amino acids c) Novel stereocontrolled synthesis of the nonacene ring system of brevetoxin ... The rather straightforward synthesis of equilenin is representative of the total syntheses of pre-World War II eraÐwith the exception of Robinsons unique tropinone synthesis. In contemplating...
Ngày tải lên: 29/04/2013, 10:27
Comparison of Two Synthesis Routes to Obtain Gold Nanoparticlesin Polyimide
Ngày tải lên: 18/09/2013, 21:27
Tài liệu Diseases and Disorders of Finfish in Cage Culture doc
... months of culture; production of 600–800 g per fish or 1.2–1.4 g per fish Stocking density is 44 fish m −3 of size 80–100 g; feeding with trash fish at 3–5% of body weight twice daily; 6–7 months of culture; ... degrada- tion of water quality in cage sites and the implementation of proper management of the aquatic environment are necessary if the industry is to expand. Rosenthal (1994) indicated the importance of ... Quezon City, Philippines. P.T.K. Woo, Axelrod Institute of Ichthyology and Department of Zoology, College of Biological Science, University of Guelph, Guelph, Ontario N1G 2W1, Canada. vii 7 Z:\Customer\CABI\A4337...
Ngày tải lên: 14/02/2014, 17:20
Tài liệu Báo cáo khoa học: Interruption of triacylglycerol synthesis in the endoplasmic reticulum is the initiating event for saturated fatty acid-induced lipotoxicity in liver cells pdf
... triacylglycerol synthesis in the endoplasmic retic- ulum, apparently because of the formation of a pool of oversaturated inter- mediates, represents the key initiating event in the mechanism of saturated fatty ... 5B). The ER is the site of synthesis of all secretory pro- teins and resident proteins of the membrane system, and any perturbation that compromises the protein- folding capacity of the organelle can ... TAG synthesis. It is suggested that the creation of a pool of oversaturated lipid intermediates makes these molecules inaccessible to the enzymes of TAG synthe- sis, whereas a certain degree of...
Ngày tải lên: 14/02/2014, 22:20
Tài liệu Báo cáo khoa học: Interferon-a induces sensitization of cells to inhibition of protein synthesis by tumour necrosis factor-related apoptosis-inducing ligand ppt
... regulates the extent of formation of the eIF4F initiation complex and hence the rate of 5Â-cap-dependent protein synthesis [46]. Exposure to IFNs often alters the sensitivity of cells to agents ... sensitivity of cells to inhibition of protein synthesis by TRAIL We have previously shown that protein synthesis is rapidly downregulated following exposure of cells to TRAIL and other inducers of apoptosis ... Division of Basic Medical Sciences, St George’s, University of London, UK Members of the tumour necrosis factor-a (TNFa) fam- ily are well known as inhibitors of cell growth and inducers of apoptosis...
Ngày tải lên: 19/02/2014, 06:20
Tài liệu Báo cáo khoa học: "An Empirical Study of Information Synthesis Tasks" doc
... conclusions of this work. 2 Creation of an Information Synthesis testbed We refer to Information Synthesis as the process of generating a topic-oriented report from a non- trivial amount of relevant, ... study of the “In- formation Synthesis task, defined as the process of (given a complex information need) extracting, or- ganizing and inter-relating the pieces of information contained in a set of ... summaries consist of a) picking the first n sentences out of a set of selected documents (with different val- ues for n and different sets of documents) and b) taking the full content of a few doc- uments....
Ngày tải lên: 20/02/2014, 15:20
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