检索结果-南通市图书馆

Ethical and legal implications of gene editing in plant breeding:a systematic literature review

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Journal of Zhejiang University-Science B(Biomedicine & Biotechnology) 2023年第12期24卷 1093-1105页

作者： Siti Hafsyah idris Nurzatil Sharleeza MAT JALALUDDIN Lee Wei CHANG Faculty of Law Universiti Teknologi MARAJalan Sarjana 1/2Shah Alam 40450SelangorMalaysia Centre for Research in Biotechnology for Agriculture(CEBAR) Level 3Research Management and Innovation ComplexUniversiti MalayaKualaLumpur50603Malaysia Centre for Civilisational Dialogue Level 1High Impact Research BuildingUniversiti MalayaKuala Lumpur 50603Malaysia

Biotechnology policies and regulations must be revised and updated to reflect the most recent ad.ances in plantbreeding technology. New Plant Breeding Techniques(NPBT) such as gene editing have been applied to address the myriad of challenges in plant breeding, while the use of NPBT as emerging biotechnological tools raises legal and ethical concerns. This study aims to highlight how gene editing is operationalized in the existing literature and examine the critical issues of ethical and legal issues of gene editing for plant breeding. We carried out a systematic literature review(SLR) to provide the current states of ethical and legal discourses surrounding this topic. We also identified critical research priority areas and policy gaps that must be addressed when designing the future governance of gene editing in plant breeding.

关键词： Systematic literature review Gene editing Plant breeding Ethical and legal issues Consequentialism Virtue ethics principles

Identification of functional tumor necrosis factor-alpha promoter variants associated with Helicobacter pylori infection in the Sudanese population: Computational approach

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

World Journal of Gastroenterology 2022年第2期28卷 242-262页

作者： Abeer Babiker idris Alaa B idris Manal A Gumaa Mohammed Babiker idris Amanda Elgoraish Mohamed Mansour Dalia Allam Bashir MO Arbab Nazar Beirag El-Amin M Ibrahim Mohamed A Hassan Department of Agricultural Science and Technology Institute of Natural and Applied SciencesErciyes UniversityKayseri 38039Turkey Department of Medical Microbiology Faculty of Medical Laboratory SciencesUniversity of KhartoumKhartoum 11111Sudan Department of Neurosurgery Ribat University HospitalKhartoum 11111Sudan BioMérieux Clinical and Application advisor Al-Jeel Medical Co.Riyadh 11422Saudi Arabia Department of Epidemiology Tropical Medicine Research InstituteKhartoum 11111Sudan Department of Gastroenterology Ibn Sina Specialized HospitalKhartoum 11111Sudan Department of Gastroenterology Modern Medical CentreKhartoum 11111Sudan Biosciences College of HealthMedicine and Life SciencesBrunel UniversityLondon UB83PHUxbridgeUnited Kingdom Department of Translation Bioinformatics Detavax BiotechKayseri 38350Turkey

BACKGROUND Helicobacter pylori(***)is a ubiquitous bacterium that affects nearly half of the world’s population with a high morbidity and mortality *** within the tumor necrosis factor-alpha(TNF-A)promoter region are considered a possible genetic basis for this *** To functionally characterize the genetic variations in the TNF-A 5’-region(-584 to+107)of Sudanese patients infected with *** using in silico *** An observational study was carried out in major public and private hospitals in Khartoum state.A total of 122 gastric biopsies were taken from patients who had been referred for *** DNA was *** of the TNF-A-1030 polymorphism was performed using PCR with confronting two-pair primer to investigate its association with the susceptibility to *** infection in the Sudanese ***,Sanger sequencing was applied to detect single nucleotide polymorphisms in the 5’-region(-584 to+107)of TNF-A in ***-infected *** analyses were used to predict whether these mutations would alter transcription factor binding sites or composite regulatory elements in this region.A comparative profiling analysis was conducted in 11 species using the ECR browser and multiple-sequence local alignment and visualization search engine to investigate the possible ***,a multivariate logistic regression model was constructed to estimate odds ratios and their 95%confidence intervals for the association between TNF-A-1030,sociodemographic characteristics and *** *** were statistically significant if PA,-76)was located at the in silico-predicted promoter region(-146 to+10),and it was predicted to alter transcription factor b

关键词： 5’-region Promoter TNF-A Helicobacter pylori In silico analysis Sudan

Effect of Primary and Eutectic Mg_2Si Crystal Modifications on the Mechanical Properties and Sliding Wear Behaviour of an Al–20Mg_2Si–2Cu–xBi Composite

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Journal of Materials Science & Technology 2016年第11期32卷 1083-1097页

作者： Saeed Farahany Hamidreza Ghandvar Nur Azmah Nordin Ali Ourdjini Mohd Hasbullah idris Department of Materials and Mechanical Engineering Buein Zahra Technical University Department of Materials Manufacturing and Industrial Engineering Faculty of Mechanical Engineering Universiti Teknologi Malaysia (UTM) Department of Mechanical Engineering Faculty of Engineering University of Ottawa

This work investigated the microstructure evolution, tensile, impact, hardness, and sliding wear properties of an Al–20Mg2Si–2Cu in situ composite treated with different Bi contents. The desired modification of primary Mg2 Si particles was achieved with the addition of 0.4 wt% Bi. Increasing Bi beyond 0.4 wt%resulted in a loss of modification, possibly due to the formation of Al8 MgB iS i4 compound before the precipitation of the primary Mg2 Si. additionally, the structure of the pseudo-eutectic Mg2 Si was transformed from plate to fibrous, which was consistent with decrease of growth temperature extracted from the cooling curve thermal analysis. addition of Bi had.an effect on the morphology of Al5 Fe Si（β）, Al2Cu（θ） and Al5Cu2Mg8Si6（Q） intermetallic compounds. The tensile strength, elongation percentage, impact toughness, and hardness increased by 6%, 13%, 75%, and 23%, respectively, due to modification of both the primary and eutectic Mg2 Si crystals. The tensile and impact fracture surfaces showed fewer decohered particles in the Bi-treated composite. The enhancement in wear resistance of the Bi-treated composite could be attributed to solid lubricant function of insoluble soft Bi phase and modification effects on Mg2 Si particles.

关键词： Al–Mg2Si Composite Modification Bismuth Mechanical properties Wear

Effect of Al powder and silica sol on the structure and mechanical properties of Al_2O_3-ZrO_2 foams

在线全文

学校读者我要写书评

暂无评论

Acta Metallurgica Sinica(English Letters) 2010年第4期23卷 241-247页

作者： H.Sharifi M.Divandari A.Khavandi M.H.idris School of Materials and Metallurgical Engineering Iran University of Science and Technology Department of Material Engineering Faculty of Mechanical EngineeringUniversti Teknologi Malaysia

Polymeric sponge replication method is one of the common ways for ceramic foam production. The existence of central triangular voids in the struts results in a decrease of mechanical properties limiting their applications. To remove this defect, some additives consisting of Al powder particles and silica sol are added to ceramic slurries consisting of Al2O3 and ZrO2 （partially stabilized zirconia）. With increasing temperature for pyrolyzing and sintering of raw materials, first the Al powder and then the glass phase which consisted of melted Al2O3, ZrO2 and SiO2 was soaked into hollow struts. SEM investigations showed that the center of foam struts were free of hollows. XRD considerations depicted that a ZrO2 phase with tetragonal crystallographic structure is present in the produced foam which could be the reason of improved toughness and mechanical properties. Compressive strength of foams increased significantly due to the decrease of closed porosity. The Weibull statistical study showed remarkable increasing of the Weibull module and its value for foams with 10, 20 and 30 ppi was 5.91, 6.06 and 6.53 respectively.

关键词： Ceramic foam Processing Strut structure Al2O3-ZrO2 Weibull modulus

Causal Relationship between CO2 Emissions and Economic Factors:Evidence from Different Income Group of Economies

在线全文

学校读者我要写书评

暂无评论

Causal Relationship between CO2 Emissions and Economic Facto...

作者： idris Ali 山东大学

学位级别：硕士

研究背景:近几十年来,全球经济经历了显著的经济增长;尽管这种增长在世界各地并不均衡。一些国家正在实现经济高速增长;一些国家经济增长缓慢,甚至出现经济增长乏力的现象。主要经济驱动力;国内生产总值(GDP)、外国直接投资(FDI)、出口... 详细信息

研究背景:近几十年来,全球经济经历了显著的经济增长;尽管这种增长在世界各地并不均衡。一些国家正在实现经济高速增长;一些国家经济增长缓慢,甚至出现经济增长乏力的现象。主要经济驱动力;国内生产总值(GDP)、外国直接投资(FDI)、出口、进口和人口在过去几十年,特别是自1950年代以来以更快的速度增长。毫无疑问,经济发展通过创造新的就业机会、提供多样化和大量的商品和服务、更好的保健、先进的技术经验、更好的教育、更好的交通特权,为人民带来许多福祉,减轻贫困等等,这肯定会提高世界各地人民的生活水平。相比之下,经济发展的阴暗面虽少,但却十分显著;例如,排放过量的二氧化碳,这是全球气温上升、空气污染和环境恶化的根本原因,总之,过量的二氧化碳排放是对人类、植物和地球的一个有影响力的威胁。鉴于以上事实,本研究旨在探讨二氧化碳(C02)排放与主要经济驱动力之间的因果关系;人均国内生产总值,FDI,国际贸易-出口和进口,和人口(POP)为98(98)国家一起和收入组四个亚组的国家,即低收入国家,较低的中等收入国家,中上收入国家,和高收入国家。研究差距:尽管在这一领域有大量针对个别国家和国家集团的研究工作和文献,但出于一些正当的理由,仍有足够的空间在这一重要研究领域开展工作。首先,上述领域的研究成果不确定,而且差异很大。第二,现有的研究大多是针对个别国家进行的,少数研究是针对少数国家集团进行的,这些国家集团大多是区域性国家集团。比如对金砖国家、中东和北非地区国家、七国集团国家、南亚和东南亚国家(SESA)等进行研究。我们发现只有两项研究工作与目前基于有限样本国家不同收入群体的研究密切相关。因此,本研究的目的是分析因果关系的国家的综合样本,参照低收入国家,中低收入国家,中上收入国家和高收入国家。第三,据我们所知,只有Begum等人(2015)在对单个国家马来西亚进行的一项研究中将人口作为二氧化碳排放的驱动因素。我们没有发现任何其他研究将人口作为二氧化碳排放的驱动因素;因此,我们将人口作为二氧化碳排放的驱动因素纳入本研究,并调查它们之间的因果关系。希望,目前的研究将填补已确定的研究空白,并为该领域现有的研究文献提供新的知识。研究方法与计量模型:本研究考察了 C02排放与主要经济变量之间的因果关系;GDP,FDI,出口,进口和人口。本研究还比较分析了不同经济收入群体之间的因果关系,即高收入国家、中上收入国家、中低收入国家和低收入国家。研究涵盖了来自不同收入群体的98个抽样国家;其中包括13个低收入经济体,20个中低收入经济体,26个中上收入经济体和39个高收入经济体。本研究基于世界银行(WB)、忧情科学家联盟(Union of Concerned Scientists)、数据中的世界(Our World in data)等网站收集的2000-2018年二手数据。本研究采用面板向量自回归(PVAR)计量模型来诊断二氧化碳排放与关键经济变量之间的因果关系。然而,许多学者像Acheampong(2018);Koengkan,Losekann,&Fuinhas(2018);Lin&Xu(20180;Wang,Wang,Du等人,(2019);Ahmed和Khder(2014)出于同样的目的,采用VAR模型分析了 C02排放与主要经济变量之间的因果关系。数据分析开始使用描述性统计,分别显示各自变量的均值、最大值、最小值、标准差、偏度、峰度值,并使用Eviews 10进行面板单位根检验、面板协整检验、最优滞后选择和PVAR。数据分析和结果:论文首先概述了长期趋势分析的主要变量选择的研究,显示了深刻的趋势和显著的变化发生在长期;大部分变量,二氧化碳排放,GDP,FDI,出口,进口和人口经历上升趋势。在某些情况下,变量有轻微和剧烈的波动,例如近年来外国直接投资和国际贸易经验的波动趋势;最可能的原因是经济冲击、工农业生产冲击、区域和全球金融危机。相比之下,一些变量,如GDP,二氧化碳排放和人口,经历了长期平稳上升的趋势。其次,通过描述性统计分析,发现中低收入国家的平均二氧化碳排放量最高;在研究期间,高收入国家的二氧化碳排放量位居第二。根据2000年至2018年的数据,低收入国家的平均二氧化碳排放量最低,而中低收入国家的年均二氧化碳排放量第三高。根据这些结果,可以得出一个结论,一个国家的收入越高,其二氧化碳排放量越高。研究还发现,GDP、FDI、进出口与C02排放呈正相关关系,即GDP越高,FDI、进出口与C02排放越高,反之亦然。VAR模型下的实证估计首先采用若干替代的面板单位根检验来检验潜在变量的平稳性。根据面板数据的特点,在建立面板VAR模型之前,采用单位根检验来检验数据是平稳的还是非平稳的。面板VAR模型估计的可靠性取决于变量的平稳性。因此,本研究采用Augment

关键词：二氧化碳排放 GDP FDI 出口进口人口与VAR模型

Effect of thermomechanical treatment on microstructure and hardness behavior of AZ63 magnesium alloy

同方学位论文库评论

在线全文

同方学位论文库

学校读者我要写书评

暂无评论

Acta Metallurgica Sinica(English Letters) 2009年第6期22卷 401-407页

作者： H. Jafari M.H. idris A. Ourdjini G. Payganeh Department of Materials Engineering Faculty of Mechanical EngineeringUniversiti Teknologi Malaysia Department of Materials Engineering Faculty of Mechanical EngineeringShahid Rajaee Teacher Training University Department of Materials Engineering Faculty of Mechanical Engineering Shahid Rajaee Teacher Training University

Due to their high specific strength and low density, magnesium alloys are widely used in many weight-saving applications. This research is aimed at investigating the microstructure and hardness of commercial AZ63 alloy specimens subjected to two different thermomechanical treatments （TMTs）. For the first TMT, after solution treated at the temperature of 380 ℃ for 20 h, AZ63 alloy specimens were 5% cold worked by rolling process followed by ageing at the temperatures of 150 ℃and 250 ℃ for 3, 9 and 25 h. In the second TMT, the specimens were solution treated at the temperature of 380 ℃ for 20 h, underwent 2% cold worked and quenched in water of 0 ℃. Half of the specimens were then 2% cold worked whilst the rest were rolled to 8% cold worked. All the specimens were then aged at the temperatures of 150 ℃ and 250 ℃ for 3, 9 and 25 h. Optical microscope was used to analyze the microstructures of the specimens. Hardness test was too conducted to measure the effect of the treatments on the specimens. Results show that two-step aging enhances the hardness of the specimens due to the distribution of fine β-phase （MglTA112） in the alloy matrix. The results also reveal that, the best hardness from the first TMT was produced by specimen that was pre-aged at 150 ℃ whereas, in the second TMT, aging at 250 ℃ exhibited the best hardness values.

关键词： Thermomechanical treatment Magnesium alloys Cold work Aging AZ63

The Operation Performance Study of Distance Relay During Single Phase Reclosure

在线全文

学校读者我要写书评

暂无评论

The Operation Performance Study of Distance Relay During Sin...

作者： idris Khan 华北电力大学

学位级别：硕士

Electrical power is most important in day-to-day life. An electrical power system consists of generators, transformers, transmission and distribution lines etc. The electrical power is generated at generating stations or power stations. This generated power is stepped up and is transmitted through transmission lines. This transmitted power is stepped down at substations and is distributed to the consumers through feeders. During the transmission, faults can occur, which causes damage to the power system devices. The system also loses its stability when fault occurs. If a fault occurs in an element of a power system, an automatic protective device is needed to isolate the faulty element as quickly as possible to keep the healthy section of the system in normal condition.A protective system includes circuit breakers and protective relays to isolate the faulty section of the system from the healthy sections. These protective elements should be able to analyze the type of fault that occurred during abnormal conditions. In this, we have analyzed different types of faults over a transmission line placed between two buses.The simulation studies is carried out using PSCad/EMTDC software, and the results obtained is verified theoretically. Distance relays are used to detect and protect from faults in transmission lines. A distance relay measures the impedance to the fault using the measured local voltage and current.Modelling of distance relays offer an economical and feasible alternative to investigate the performance of relays and protection systems. In this thesis MHO Characteristics and Frequency Dependent (Phase) model type transmission line are modelled and simulated using PSCad/EMTDC software. To study the performance of the relay characteristics, single line to ground fault with and without fault resistances are considered. A Fast Fourier Transform block and sequence components blocks in PSCad/EMTDC have been used to extract the fundamental components. Th

关键词： Distance relay modeling using PSCad Distance relay operation during single phase reclosing in two cases Distance relay operation when P.T is on the bus side of the open phase Distance relay operation when P.T is on the open side of transmission line

Improved process monitoring using the CUSUM and EWMA-based multiscale PCA fault detection framework

同方学位论文库评论

在线全文

同方学位论文库

学校读者我要写书评

暂无评论

Chinese Journal of Chemical Engineering 2021年第1期34卷 253-265页

作者： Muhammad Nawaz Abdulhalim Shah Maulud Haslinda Zabiri Syed Ali Ammar Taqvi Alamin idris Department of Chemical Engineering Universiti Teknologi PETRONAS32610 Bandar Seri IskandarPerakMalaysia Centre of Contaminant Control&Utilization(CenCoU) Universiti Teknologi PETRONAS32610 Bandar Seri IskandarPerakMalaysia Department of Chemical Engineering NED University of Engineering&TechnologyKarachi 75270Pakistan Department of Chemical and Engineering Sciences Karlstad UniversityKarlstadSweden

Process monitoring techniques are of paramount importance in the chemical industry to improve both the product quality and plant *** or incipient irregularities may lead to severe degradation in complex chemical processes,and the conventional process monitoring techniques cannot detect these *** this study to improve the performance of monitoring,an online multiscale fault detection approach is proposed by integrating multiscale principal component analysis(MSPCA) with cumulative sum(CUSUM) and exponentially weighted moving average(EWMA) control *** new Hotelling's T~2 and square prediction error(SPE) based fault detection indices are proposed to detect the incipient irregularities in the process *** performance of the proposed fault detection methods was tested for simulated data obtained from the CSTR system and compared to that of conventional PCA and MSPCA based *** results demonstrate that the proposed EWMA based MSPCA fault detection method was successful in detecting the ***,a comparative study shows that the SPEEWMA monitoring index exhibits a better performance with lower values of missed detections ranging from 0% to 0.80% and false alarms ranging from 0% to 21.20%.

关键词： Chemical process system CSTR Fault detection Multiscale Principal component analysis Process monitoring

Influence of Gating System,Sand Grain Size,and Mould Coating on Microstructure and Mechanical Properties of Thin-Wall Ductile Iron

在线全文

学校读者我要写书评

暂无评论

Journal of Iron and Steel Research International 2010年第12期17卷 38-45页

作者： Hassan Jafari Mohd Hasbullah idris Ali Ourdjini Majid Karimian Gholamhassan Payganeh Department of Materials Engineering Universiti Teknologi Malaysia Department of Materials Engineering Shahid Rajaee Teacher Training University

Two gating systems namely stepped and tapered runners were used to cast strip samples with different thicknesses by CO2/silicate process using sand grain sizes of AFS 151 and 171. To assess the effect of mould coating on the properties of thin wall ductile iron, half of the moulds were coated whilst the rest were not coated. Molten metal with the carbon equivalent of 4.29% was prepared and poured at 1 450 ℃. Microstructure of the specimens was analyzed by optical and scanning electron microscopes. Count, area fraction, roundness and diameter of the graphite nodules of the samples were measured by image analyzer. Brinell hardness and tensile tests of all the samples were also conducted. The results show that by using stepped runner gating system with uncoated and coarse sand mould, roundness and count of the graphite nodules decrease whereas diameter and area fraction increase. Although fine sand and coated mould cause longer distance of molten metal travel, hardness and strength of the samples decrease.

关键词： thin-wail ductile iron gating system sand grain size mould coating mechanical property mierostructure