Xem 1-20 trên 34 kết quả Calcium ions
  • Tuyển tập báo cáo các nghiên cứu khoa học quốc tế ngành y học dành cho các bạn tham khảo đề tài: Transient effect of weak electromagnetic fields on calcium ion concentration in Arabidopsis thaliana

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  • Kênh Sodium. Kênh Calcium Kênh Potassium. Kênh Chloride. .Biểu diễn kênh ion Kênh ion được biểu diễn ở 2 dạng: 1. dạng 2D. 2. dạng 3D. .Kênh Sodium: tiểu đơn vị α dạng 2D. .Mô hình 3 D của 2 trong

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  • NOVARTIS viên nén sủi bọt : ống 20 viên. THÀNH PHẦN cho 1 viên Calcium gluconolactate 2,94 g Calcium carbonate 0,30 g tương ứng : Ca : 12,5 mmol hoặc 500 mg (Sodium : 12,5 mmol hoặc) (275 mg) (Sucrose) (868 mg) DƯỢC LỰC Calcium-Sandoz forte chứa các muối canxi có thể ion hóa và dễ tan.

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  • The extreme thermal stabilization achieved by the introduction of a disul-fide bond (G8C⁄N60C) into the cysteine-free wild-type-like mutant (pWT) of the neutral protease fromBacillus stearothermophilus[Mansfeld J, Vri-end G, Dijkstra BW, Veltman OR, Van den Burg B, Venema G, Ulbrich-Hofmann R & Eijsink VG (1997)J Biol Chem 272, 11152–11156] was attributed to the fixation of the loop region 56–69.

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  • Vật mô phỏng lượng tử” kĩ thuật số đầu tiên xây dựng trên các ion bị bẫy vừa được các nhà vật lí ở Áo chế tạo. Hệ trên, do Ben Lanyon cùng đồng nghiệp tại trường Đại học Innsbruck phát triển, gồm một số ion calcium bị bẫy thao tác bằng chuỗi xung laser. Đội nghiên cứu đó sử dụng hệ trờn để mô phỏng sự diễn tiến theo thời gian của một số hệ nhiều hạt.

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  • Tổng quan về ăn mòn bê tông cốt thép dưới tác dụng của ion clorua Phản ứng của quá trình ăn mòn xảy ra như sau: Anode: FeFe2 + + 2e Cathode: O2 + 2H2O + 4e24 OH- -Cấu trúc bê tông cốt thép bị ăn mòn rất nhanh chóng dưới tác dụng của ion clorua trong biển môi trường -Tỷ lệ agressivity mạnh mẽ của ion clorua là chính lý do gây ra sự ăn mòn, đặc biệt là trong Khí hậu nhiệt đới của Việt Nam.

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  • Introduction: Ethylene glycol is being widely used as solvents, lubricants and surfactants in industries; for daily necessities, it is being used as a component of cold-reserving materials and of nonfreezing coolants of automobiles. There were cases of accidental and suicidal ingestion of such fluids [1–3]. As toxic actions of ethylene glycol, suppression of central nervous system activities similar to that of alcohol and metabolic acidosis caused by glycolic acid produced from ethylene glycol can be mentioned.

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  • Quantitative  distribution  of  main  ions  and  other  chemical  components  of  groundwater  are characterized by theirs statistical parameters. They depend closely on probability distribution of  the  data.

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  • Calculate the Nernst equilibrium potential for sodium, potassium, and calcium ions given their intracellular and extracellular concentrations. 3. Describe how changing the concentrations of sodium, potassium, and calcium ions inside and outside the cell affect the resting membrane potential in cardiac cells. 4. Explain why the resting potential is near the equilibrium potential for potassium and the peak of an action potential approaches the equilibrium potential for sodium. 5.

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  • This study has investigated in a comparative fashion the effect of cation, polysaccharide, and Polyelectrolyte on the flocculation dynamics and final properties of both synthetic and activated sludge. The results from experiments indicate that cation, polysaccharide, and Polyelectrolyte could influence sludge floc characteristics as they relate to sludge conditioning. The relationship between polysaccharide and cation concentration was examined at laboratory scale during flocculation with both synthetic and activated...

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  • Ionic methods of separation have been used since the industrial revolution in Europe to reduce hardness of water. In the mid-nineteenth century, British researchers treated various clays with ammonium sulfate or carbonate in solution to release calcium. In the early twentieth century, zeolite columns were used to remove interfering calcium and magnesium ions from solutions to permit determination of sulfate. Ionic separation procedures were used in the Manhattan project to purify and concentrate radioactive materials needed to make atom bombs.

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  • Clinical Manifestations Intestinal Disorders Food Poisoning C. perfringens, primarily type A, is the second or third most common cause of food poisoning in the United States (Chap. 122). The responsible toxin is thought to be a cytotoxin produced by 75% of strains isolated from cases of foodborne disease. The cytotoxin binds to a receptor on the small-bowel brush border and induces a calcium ion–dependent alteration in permeability. The associated loss of ions alters intracellular metabolism, resulting in cell death.

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  • Harrison's Hypocalcemia Internal Medicine Chapter 47. Hypercalcemia and HYPERCALCEMIA AND HYPOCALCEMIA: INTRODUCTION The calcium ion plays a critical role in normal cellular function and signaling, regulating diverse physiologic processes such as neuromuscular signaling, cardiac contractility, hormone secretion, and blood coagulation. Thus, extracellular calcium concentrations are maintained within an exquisitely narrow range through a series of feedback mechanisms that involve parathyroid hormone (PTH) and the active vitamin D metabolite 1,25-dihydroxyvitmin D [1,25(OH)2D].

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  • The calcium ion plays a critical role in normal cellular function and signaling, regulating diverse physiologic processes such as neuromuscular signaling, cardiac contractility, hormone secretion, and blood coagulation. Thus, extracellular calcium concentrations are maintained within an exquisitely narrow range through a series of feedback mechanisms that involve parathyroid hormone (PTH) and the active vitamin D metabolite 1,25-dihydroxyvitmin D [1,25(OH)2D]. These feedback mechanisms are orchestrated by integrating signals between the parathyroid glands, kidney, intestine, and bone (Fig.

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  • The structure of the Mg 2+ -dependent enzyme human phosphoserine phosphatase (HPSP) was exploited to examine the structural and functional role of the divalent cation in the active site of phosphatases. Most interesting is the biochemical observation that a Ca 2+ ion inhibits the activity of HPSP, even in the presence of added Mg 2+ .The sixfold coordinated Mg 2+ ion present in the active site of HPSP under normal physiological conditions, was replaced by a Ca 2+ ion by using a crystallization conditionwith high concentration of CaCl2(0.7M). ...

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  • The effect of gadolinium ions on the sarcoplasmic reticulum (SR) calcium release channel⁄ryanodine receptor (RyR1) was studied using heavy SR (HSR) vesicles and RyR1 isolated from rabbit fast twitch muscle. In the [ 3 H]ryanodine binding assay, 5lmGd 3+ increased the Kd of the [ 3 H]ry-anodine binding of the vesicles from 33.8 nmto 45.6 nmwhileBmax, refer-ring to the binding capacity, was not affected significantly. In the presence of 18 nm[ 3 H]ryanodine and 100lmfree Ca 2+ ,Gd 3+ inhibited the binding of the radiolabeled ryanodine with an apparentKd value of 14.

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  • DƯỢC LỰC Calcium-Sandoz forte chứa các muối canxi có thể ion hóa và dễ tan. Thuốc chứa hàm lượng canxi cao do đó được sử dụng như một liệu pháp bổ sung canxi mạnh dạng uống, điều trị các tình trạng thiếu canxi cấp tính hoặc mạn tính cũng như các rối loạn chuyển hóa xương ở mọi độ tuổi. DƯỢC ĐỘNG HỌC

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  • Calcium is an extraordinarily versatile signaling ion, encoding cellular responses to a wide variety of external stimuli. In neurons, mitochondria can accumulate enormous amounts of calcium, with the consequence that mitochondrial calcium uptake, sequestration and release play pivotal roles in orchestrating calcium-dependent responses as diverse as gene transcrip-tion and cell death.

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  • Clostridium histolyticum collagenase is responsible for extensive tissue destruction in gas gangrene, and its activity is enhanced by calcium ions. The collagen-binding domain is the minimal segment of the enzyme required for binding to insoluble collagen fibrils and for subsequent colla-genolysis.

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  • The two main mammalian calpains, 1 and 2, are heterodimers of a large 80 kDa and a small 28 kDa subunit that together bind multiple calcium ions during enzyme activation. The main contact between the two subunits of these intracellular cysteine proteases is through a pairing of the fifth EF-hand of their C-terminal penta-EF-hand (PEF) domains.

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