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混合稀土对AlMg5Si1铝合金铸态组织与性能的影响

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铸造 2016年第3期65卷 253-257页

作者：王洪飞孔维兵胡心平 HU henry 齐鲁工业大学山东济南250353 University of Windsor Ontario Windsor N9B3P4Canada

通过SEM、EDS和XRD研究了不同质量分数的混合稀土对Al Mg5Si1合金组织与性能的影响。结果表明,稀土可以有效地细化合金晶粒组织,并且提高合金的强韧性。稀土含量为0.7%时合金的抗拉强度最高为194.8 Mpa,伸长率为3.3%,比未加稀土的合金... 详细信息

通过SEM、EDS和XRD研究了不同质量分数的混合稀土对Al Mg5Si1合金组织与性能的影响。结果表明,稀土可以有效地细化合金晶粒组织,并且提高合金的强韧性。稀土含量为0.7%时合金的抗拉强度最高为194.8 Mpa,伸长率为3.3%,比未加稀土的合金抗拉强度和伸长率分别提高了33.0%和153.8%。试验分析还表明,在RE含量低于0.7%时,RE晶粒细化对合金的强韧化的作用能足以抵消针状的不规则多边形Mg2Si对基体的割裂作用。

关键词：混合稀土 Al Mg5Si1 微观组织晶粒细化强韧性

Exploring a natural MDR reversal agent: potential of medicinal food supplement Nerium oleander leaf distillate

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Asian pacific Journal of Tropical Biomedicine 2013年第8期3卷 644-649页

作者： Meltem Demirel Kars Ufuk Gündüz Kamilüney AhmetLevent Ba Seluk University Saraynü Vocational High School42430 KonyaTurkey Seluk University Advanced Technology Research and Application Center42075 KonyaTurkey Middle East Technical University Department of Biological Sciences06531 AnkaraTurkey Selcuk University Faculty of Veterinary MedicineDepartment of Toxicology and Pharmacology42075KonyaTurkey Selcuk University Faculty of Veterinary MedicineDepartment of Toxicology and Pharmacology42075KonyaTurkeyy

Objective:To investigate the molecular effects ofNerium oleanderleaf distillate on paclitaxel and vincristine resistant(MCF-7/pac and MCF-7/Vinc)cells and sensitive(MCF-7/S)cell ***:Nerium oleander(***)leaf extract was obtained by hydrodistillation *** toxicological effects ***,previously suggested as medicinal food supplement,on drug resistant cells were evaluated by XTT *** modulation potential of the plant material was evaluated by flow cytometry and fluorescent *** and vincristine were applied to the sublines in combination with ***:Fractional inhibitory indices show *** did not increase the antiproliferative effects of anticancer *** in to MCF-7/pac and MCF-7/Vinc did not inhibit p-gp activity and MDR1 gene expression ***:As a result it may be suggested that *** has some medicinal effects as food supplement it may not be suitable as an MDR modulator for drug resistant breast cancer cells.

关键词： Nerium oleander MCF-7 FRSA activity MDR reversal Medicinal food supplement

Is hepatic steatosis associated with left ventricular mass index increase in the general population?

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World Journal of Hepatology 2017年第19期9卷 857-866页

作者： Katharina piontek Carsten O Schmidt Sebastian E Baumeister Markus M Lerch Julia Mayerle Marcus Dorr Stephan B Felix henry Volzke Institute for Medical psychology University Medicine Greifswald Institute for Community Medicine University Medicine Greifswald Department of Medicine A University Medicine Greifswald Department of Cardiology University Medicine Greifswald German Centre for Cardiovascular Research Partner site Greifswald

AIM To investigate the association between hepatic steatosis and change in left ventricular mass index(LVMI) over five years, and examine whether systolic and diastolic blood pressures are mediators of the association between hepatic steatosis and LVMI using a general population *** We analyzed data from the Study of Health in pomerania. The study population comprised 1298individuals aged 45 to 81 years. Hepatic steatosis was defined as the presence of a hyperechogenic pattern of the liver together with elevated serum alanine transferase levels. Left ventricular mass was determined echocardiographically and indexed to height2.7. path analyses were conducted to differentiate direct and indirect paths from hepatic steatosis to LVMI encompassing systolic and diastolic blood pressure as potential mediating *** Hepatic steatosis was a significant predictor for all measured echocardiographic characteristics at baseline. path analyses revealed that the association of hepatic steatosis with LVMI change after five years was negligibly small(β =-0.12, s.e. = 0.21, p = 0.55). Systolic blood pressure at baseline was inversely associated with LVMI change(β =-0.09, s.e. = 0.03, p pressure at baseline and LVMI change was evident(β = 0.03, s.e. = 0.05, p = 0.56). The effect of the indirect path from hepatic steatosis to LVMI via systolic baseline blood pressure was small(β =-0.20, s.e. = 0.10, p = 0.07). No indirect effect was observed for the path via diastolic baseline blood pressure(β = 0.03, s.e. = 0.06, p = 0.60). Similar associations were observed in the subgroup of individuals not receiving beta-blockers, calcium channel blockers, or drugs acting on the reninangiotensin *** Baseline associations between hepatic steatosis and LVMI do not extend to associations with LVMI change after five years. More studies are needed to study the longitudinal effects of hepatic steatosis on LVMI.

关键词： Hepatic steatosis Left ventricular mass index Blood pressure General population Study of Health in pomerania

An Introduction to the Theory of Field Extensions

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Advances in pure Mathematics 2023年第2期13卷 103-132页

作者： Saviour Chibeti Iness Kyapwanyama henry M. phiri Jeromy Kalunga Economics Department University of Lusaka Lusaka Zambia Department of Mathematics Copperbelt University Kitwe Zambia

This paper unfolds and reviews the theory of abstract algebra, field extensions and discusses various kinds of field extensions. Field extensions are said to be algebraic or transcendental. We pay much attention to algebraic extensions. Finally, we construct finite extensions of Q and finite extensions of the function field over finite field Fp using the notion of field completion, analogous to field extensions. With the study of field extensions, considering any polynomial with coefficients in the field, we can find the roots of the polynomial, and with the notion of algebraically closed fields, we have one field, F, where we can find the roots of any polynomial with coefficients in F.

关键词： Fields Extension Fields Algebraic and Transcendental Extension Algebraic Closure Algebraically Closed Field Absolute Value Completion p-Adic Field and Field of Formal Laurent Series

Evaluation of high yielding soybean germplasm under water limitation

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Journal of Integrative plant Biology 2016年第5期58卷 475-491页

作者： Silvas J.prince Mackensie Murphy Raymond N.Mutava Zhengzhi Zhang Na Nguyen Yoon Ha Kim Safiullah M.pathan Grover J.Shannon Babu Valliyodan henry T.Nguyen National Center for Soybean Biotechnology and Division of plant Sciences University of Missouri

Limited information is available for soybean root traits and their plasticity under drought stress. To date, no studies have focused on examining diverse soybean germ- plasm for regulation of shoot and root response under water limited conditions across varying soil types. In this study, 17 genetically diverse soybean germplasm lines were selected to study root response to water limited conditions in clay （trial 1） and sandy soil （trial 2） in two target environments. physiological data on shoot traits was measured at multiple crop stages ranging from early vegetative to pod filling. The phenotypic root traits, and biomass accumulation data are collected at pod filling stage. In trial 1, the number of lateral roots and forks were positively correlated with plot yield under water limitation and in trial 2, lateral root thickness was positively correlated with the hill plot yield. plant Introduction （pI） 578477A and 088444 were found to have higher later root number and forks in clay soil with higher yield under water limitation, in sandy soil, p1458o2o was found to have a thicker lateral root system and higher yield under water limitation. The genotypes identified in this study could be used to enhance drought tolerance of elite soybean cultivars through improved root traits specific to target environments.

关键词： Fibrous root root angle root plasticity root systemarchitecture (RSA) root thickness spectral indices soybean spectralindices total root length water limitation

prognostic Factors for the Occurrence of Blood Exposure Accidents among Health personnel at the Kaolack Regional Hospital (Senegal)

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Modern plastic Surgery 2023年第3期13卷 195-207页

作者： Boubacar Gueye Fatoumata Ly ndéye Marième Diagne Martial Coly Bop Alioune Badara Tall Abdoul Aziz ndiaye Ousseynou Ka Health and Sustainable Development Department Alouine Diop University Bambeye Senegal Ministry of Health and Social Action Dakar Senegal principal Hospital of Dakar Dakar Senegal

Caregivers are highly exposed to blood exposure accidents (BEA). The objective of our study is to determine the frequency of BEA and to identify the predictive factors for the occurrence of BEAs among caregivers at the Kaolack Regional Hospital (KRH). It is a descriptive and analytical cross-sectional study of KRH’s caregivers. The data were collected during the period from 16 to 26 April 2018. The multivariate analysis was carried out using the binary logistic regression model with a dependent variable (occurrence of blood exposure accidents) and 5 explanatory variables (sex, age, service of belonging, professional category and seniority in the profession). A total of 115 caregivers were surveyed out of 144. It is noted that 68 caregivers (59.1%) have had at least one BEA in the previous 12 months. The age of caregivers significantly reduces the risk of developing a BEA (p = 0.004, CI [0.04 - 0.21]);belonging to the age group [20 - 40 years] increases the risk of a BEA by 6.66. Sex significantly influences the occurrence of BEA with a (p = 0.013, CI [1.47 - 19.4]);men are 5 times more likely to develop BEA. The risk of a BEA occurring varies according to the professional category. Senior health technicians have a significantly 50 times lower risk of occurrence of a BEA (p = 0.007, CI [0.00 - 0.24)]. Nurses and midwives have a 5.8 lower risk of developing BEAs (p = 0.031, CI [0.03 - 0.75]). The risk of occurrence of BEAs varies according to the service of belonging;Medicine service caregivers have a significantly 50-fold lower risk of developing BEAs (p = 0.004, CI [0.00 - 0.17]). The identified risk factors will be used to better guide our BEAs prevention interventions.

关键词： Blood Exposure Accidents prognostic Factors of Occurrence Senegal

Computational Study on Furnace process in a Multi-burner Boiler of pulverized Coal Fired Tangentially at Four Corners

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Journal of Central South University 2000年第3期12卷 152-155页

作者： Zhou, p Mei, C Cong, GC Cent S Univ Technol Dept Appl Phys & Heat Engn Changsha 410083 Peoples R China

Aiming at the optimization of the operation condition, a general numerical method for calculating pulverized coal combustion in a full scale furnace fired tangentially at four corners is adopted. “ k ε ” turbulence model is used for the gas phases and a stochastic approach based on the Lagrangian technique is used for particle phases. Two competing reactions model for the coal devolatilization and pDF (the probability density function) method for the combustion of the gas phases are employed. In the numerical simulations, assuming the air distribution of second port level is of pagoda, waist drum and uniform type. The results show that pagoda type air distribution is advantageous to ignition and smooth combustion of pulverized coal, and suitable to inferior coal combustion in practice. In the present furnace, the igniting distance at 1st and 3rd corner is longer than that at 2nd and 4th corner. The results from numerical calculations are in good agreement with those of observed in practice.

关键词： power station boiler combustion of pulverized coal numerical simulation

Anatomy and physiology of peripheral auditory system and commen causes of hearing loss

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Journal of Otology 2009年第1期4卷 -页

作者： ZHANG Qing1,DUAN Mao-li1-4 1 Department of Otorhinolarygology,The 2nd Affiliated Hospital of Xi’an Jiaotong University,School of Medicine,Xi’an Jiaotong University,Xi’an,p.R.China 2 Department of clinical neuroscience,3,Department of Otolaryngology,Karolinska Hospital,171 76 Stockholm,Sweden 4 Department of Otolaryngology,Affiliated Hospital of Anhui Medical University,China Department of Otorhinolarygology The 2nd Affiliated Hospital of Xi’ an Jiaotong UniversitySchool of Medicine Xi’ an Jiaotong University Xi’ an P.R.China Department of clinical neuroscience Karolinska Hospital 171 76 Stockholm Sweden Department of Otolaryngology Karolinska Hospital 171 76 Stockholm Sweden Department of Otolaryngology Affiliated Hospital of Anhui Medical University China

For Otolaryngologist,it is the most important to know the principle of anatomy,physiology and common *** but more concise summary has been sum up in the following review in order to help young ENT doctor to understand... 详细信息

关键词： inner hair cell outer hair cell spiral ganglion neuron ototoxicity

污泥用于林地15年后养分和重金属在土壤中分布的研究

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西北农业大学学报 1992年第3期20卷 20-27页

作者：薛栋森 Rob Harrison Chuck henry 西北农业大学农化系陕西杨陵712100 华盛顿大学

对极粗质地的森林土壤一次施用500t/hm^2干污泥15年后的土壤剖面样品,分析了pH值、ECE、全N、p、K、S、Ca、Mg、Cd、Cu、Ni、pb和Zn等,并同对照土进行比较。表层(0～17cm)中全N、p、S、CEC、Cd、Cu、Ni、pb和Zn的含量明显高于对照区;由... 详细信息

对极粗质地的森林土壤一次施用500t/hm^2干污泥15年后的土壤剖面样品,分析了pH值、ECE、全N、p、K、S、Ca、Mg、Cd、Cu、Ni、pb和Zn等,并同对照土进行比较。表层(0～17cm)中全N、p、S、CEC、Cd、Cu、Ni、pb和Zn的含量明显高于对照区;由于这种风化不完全的土壤含K、Mg、Ca较丰富,处理区与对照区差异不大;土壤pH值处理区要低;Mg移到较深层次;Ni和Zn稍有移动;pb、Cd、Cu、移至17～27cm,但未再向下层移动。

关键词：森林土壤改良污泥重金属