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The recurrent true umbilical cord knots: a case report
F Keypour,I Naghi
Tehran University Medical Journal , 2012,
Abstract: Background: True umbilical cord knot is one of the abnormalities of the umbilical cord. Active fetal movements create cord knotting. True umbilical cord knots are rare but may be associated with fetal distress and stillbirth. True umbilical cord knots are capable of impeding blood flow to the fetus.Case presentation: A 26-year old primigravid woman was first treated for genital herpes simplex virus (HSV type 2) at 36 weeks of gestational age. She received oral acyclovir (400 mg three times daily for 10 days). At the gestational age of 38 weeks and 5 days, fetal activity decreased and NST was nonreactive. She was delivered by cesarean section and a true umbilical cord knot was found. Four years later, in her second pregnancy, another true knot was seen.Conclusion: Excessively long umbilical cords are more likely to be associated with true knots. Genetics has an important role in determining cord length and occurrence of true knots.
A Study on the Effects of Solar Tracking Systems on the Performance of Photovoltaic Power Plants  [PDF]
Shahriar Bazyari, Reza Keypour, Shahrokh Farhangi, Amir Ghaedi, Khashayar Bazyari
Journal of Power and Energy Engineering (JPEE) , 2014, DOI: 10.4236/jpee.2014.24096
Abstract:

The use of renewable energy resources to produce the electricity is a rising trend in various countries worldwide. This is especially because these energies do not produce the greenhouse gases; therefore, don’t become a destructive factor on the ozone layer and the environment. Besides, the fossil energies are always exposed to price changes and will eventually end, while the renewable energies don’t pose such problems and are freely acquired from the nature. Some of the most important of these reproducible energy resources are the energies of the wind and the solar energy. The generation capability of a photovoltaic power plant is largely dependent on the intensity of the sun radiation. On the other hand, the changing of position causes the sun to have a variable shining intensity in different seasons and different times of the year; therefore, some of the solar power plants possess solar tacking systems. This paper studies the different types of photovoltaic systems including fixed panel, photovoltaic farms equipped to the single axis and double axis tracking systems and their effects on the performance of the solar power plants. In order to determine the position of the sun in the sky, the zenith and azimuth angles of it are used to extract the relations between the different parameters of the sun radiation. The resulted parameters are used in the modeling of the single axis and double axis systems. In the paper it is utilized from the sun parameters in Qeshm Island of Iran in the summer of 2011.

Synthesis of Two Potentially Heptadentate (N4O3) Schiff-base Ligands Derived from Condensation of Tris(3-aminopropyl)-amine and Salicylaldehyde or 4-Hydroxysalicylaldehyde. Nickel(II) and Copper(II) Complexes of the Former Ligand
Hassan Keypour,Sadegh Salehzadeh,R. V. Parish
Molecules , 2002, DOI: 10.3390/70200140
Abstract: Two potentially heptadentate (N4O3) tripodal Schiff-base ligands: tris(3-(salicylideneimino)propyl)amine (H3L1) and tris(3-(4’-hydroxysalicylideneimino)-propyl)amine (H3L2) have been prepared and characterized by various spectroscopic methods (IR, FAB-MS, NMR). They are derived from the condensation reactions of tris(3-aminopropyl)amine (tpt), with 3 equivalents of either salicylaldehyde or the ringsubstituted salicylaldehyde, 4-hydroxysalicylaldehyde. The nickel(II) and copper(II) complexes of H3L1 were obtained from the its reactions Ni(II) and Cu(II) salts in absolute methanol. These complexes were studied by IR and FAB-Mass spectrometry.
Synthesis and Crystal Structure Determination of a Nickel(II) Complex of an Acyclic Pentadentate (N5) Mono Schiff Base Ligand
Hassan Keypour,Sadegh Salehzadeh,R. G. Pritchard,R. V. Parish
Molecules , 2001, DOI: 10.3390/61100909
Abstract: The asymmetrical tripodal tetraamine ligand N[(CH2)3NH2]2[(CH2)2NH2] (ppe) was condensed with 2-acetylpyridine in the presence of nickel(II) ion. In ethanolwater solution the reaction stops after the first stage of condensation, and a new nickel(II) complex of an acyclic pentadentate (N5) mono Schiff base ligand was obtained. X-ray structure analysis of the resulting complex, [Ni(ppe-py)(H2O)](ClO4)2, indicates that condensation with 2-acetylpyridine is at the propylene chain of ppe. The geometry around the nickel ion is distorted octahedral in which the sixth co-ordination group is a solvent molecule.
含吡啶的大环席夫碱锰(ⅱ)配合物:合成、表征及抗菌性质
Keypour Hassan?,Liyaghati-Delshad Mozhdeh?,Rezaeivala Majid?,Khavasi Hamid Reza?
无机化学学报 , 2014,
Abstract: 在mn(ⅱ)模板作用下,2,6-diacetylpyridine(dap)及合适链状胺化合物通过[1+1]环缩合反应,合成了3个大环席夫碱配合物,并进行了红外、元素分析、质谱及电导率等表征及研究。测得了配合物[mnl1(ch3cn)](clo4)2的晶体结构,中心离子呈现出稍微扭曲的五角锥配位构型。研究了配合物对s.aureus(atcc6633),b.cereus(atcc7064),c.xerosis(atcc373)(gram-positivebacterialstrains),e.coli(ptcc10009),k.pneuomoniae(mtcc109),andp.vulgaris(lio)(gram-negativebacterialstrains)的抗菌活性。结果显示[mnl3](clo4)2抗菌活性明显优于[mnl1(ch3cn)](clo4)2and[mnl2](clo4)2.在25℃条件下0.1mol·l-1kcl溶液中,通过电位计量法测定了化合物的质子化常数。
Kroniek
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Nieuwe West-Indische Gids , 1949,
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Kroniek
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Nieuwe West-Indische Gids , 1949,
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Kroniek
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Nieuwe West-Indische Gids , 1947,
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Kroniek
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Nieuwe West-Indische Gids , 1949,
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Kroniek
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Nieuwe West-Indische Gids , 1949,
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