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超声波与EDTA联用对污染土中Pb的去除效果及其作用机理

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环境工程学报 2015年第7期9卷 3492-3496页

作者：张春雷费小通程成 osei Anokye Obed 河海大学环境学院南京210098

以人工配置的Pb污染土为对象,进行了超声波与EDTA单独及联合作用对污染土中Pb的去除实验,利用改进BCR法测定了不同作用下土中Pb的4种形态。结果表明,超声波单独作用时对土中Pb的去除率很低,EDTA单独作用时去除率可以达到55%~90%。二者... 详细信息

以人工配置的Pb污染土为对象,进行了超声波与EDTA单独及联合作用对污染土中Pb的去除实验,利用改进BCR法测定了不同作用下土中Pb的4种形态。结果表明,超声波单独作用时对土中Pb的去除率很低,EDTA单独作用时去除率可以达到55%~90%。二者联合作用下,可以明显缩短EDTA单独去除反应的时间、节省EDTA用量并增强去除效果。超声波与EDTA联用增强Pb去除的机理,可以被认为是超声波促进了土中残渣态的Pb向弱酸提取态（F1）和可还原态（F2）转化,而EDTA能够去除的Pb形态主要是F1和F2。对于实验土中Pb的去除来说,EDTA清洗起主导作用,超声波起加速和加强作用。

关键词：超声波 EDTA Pb 污染土去除重金属形态

Facile synthesis of porous Pd nanoflowers with excellent catalytic activity towards CO oxidation

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Chinese Journal of Chemical Engineering 2015年第11期23卷 1907-1915页

作者： Tareque Odoom-Wubah Mingming Du Williams Brown osei Daohua Sun Jiale Huang Qingbiao Li Department of Chemical and Biochemical Engineering College of Chemistry and Chemical Engineering Xiamen University Xiamen 361005 China Environmental Sdence Research Center College of the Environment & Ecology Xiamen University Xiamen 361005 China College of Chemistry & Life Sdence Quanzhou Normal University Quanzhou 362000 China

Microorganism-mediated, hexadecyltrimethylammonium chloride （CTAC）-directed （MCD） method was employed in this work to synthesize Pd nanoflowers （PdNFs）. Proper Pichia postoris cells （PPCs） dosage, ascorbic acid （AA）, Pd（N03）2 and CrAC concentrations were essential for the growth of the PdNFs. The size of the as- synthesized PdNFs could be tuned by adjusting the amount of Pal（N03）2 solution and dosage of PPCs used. Characterization techniques such as X-ray diffraction, transmission electron microscopy, and X-ray photoelectron spectroscopy were used to verify the nature of the PdNFs. Finally the PdNF/PPC nanocomposites were immobilized onto TiO2 supports to obtain bio-PdNF/Ti02 catalysts which showed excellent catalytic activity for CO oxidation, obtaining 100%; conversion at 100 ℃ and remaining stable over a period of 52 h of reaction time. @ 2015 The Chemical Industry and Engineering Sodety of China, and Chemical Industry Press. All rights reserved.

关键词： Pd nanoflowersMicroorganismCO oxidationCTAC

Distribution and Forage Potential of Some Insect Taxa Sampled with Sweep Nets in the Flood Plains of a Coastal Ramsar Site in Ghana

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Open Journal of Ecology 2014年第3期4卷 135-144页

作者： Francis Gbogbo Daniel osei Yeboah Maxwell K. Billah Department of Animal Biology and Conservation Science University of Ghana Legon

Wetland insect communities are an important food source for waterbirds. Yet studies on insect communities in West African coastal wetlands—a major foraging area for wintering waterbirds of the East Atlantic and Mediterranean flyways—are generally limited. This study investigated the forage potential, micro-spatial and temporal distribution of insects swept from air and low vegetation in Sakumo II—a coastal Ramsar site in Ghana. Insects of the families Thripidae, Coccinellidae, Tetrigidae and Acrididae dominated the wetland. Based on prey yield and abundance, Acrididae, Coccinellidae and Tetrigidae appeared to be most promising source of food for waterbirds. Despite the high abundance of Thripidae, their low per capita biomass rendered them a less promising food source particularly to large sized waterbird species. Spatial and temporal abundance and distributions of insects along both the latitudinal and longitudinal axes of the lagoon were non-significant. In recognition of the diversity and abundance of insects on the wetland, there is the need to investigate the disparity in the utilisation of the various taxa by waterbird species.

关键词： Insecta Waterbirds Distribution Forage Biomass

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工作生活冲突对加纳公务员福利的影响研究

工作生活冲突对加纳公务员福利的影响研究

作者： JOHNNY osei GYASI（箭尼）哈尔滨工业大学

学位级别：硕士

当今社会,人们逐渐意识到人才是组织中最重要的资产,因此雇佣和留住优秀人才成为了组织工作的主旋律。然而,个人追求和职业生涯之间的矛盾往往会导致组织内部严重的员工离职率。个人和职业之间的冲突以及冲突所带来的压力会对组织承诺... 详细信息

当今社会,人们逐渐意识到人才是组织中最重要的资产,因此雇佣和留住优秀人才成为了组织工作的主旋律。然而,个人追求和职业生涯之间的矛盾往往会导致组织内部严重的员工离职率。个人和职业之间的冲突以及冲突所带来的压力会对组织承诺、工作满意度和员工离职率等造成严重影响。在加纳的各种组织中都可以观察到个人追求和职业生涯存在冲突的现象。本研究主要针对加纳的公务员,由于他们在守时、诚信、工作效率和遵守工作规定等方面表现的差强人意,所以他们经常被冠以冷漠或者低效率的名头。2015年,共有297名人员通过自愿或非自愿的方式退出行政服务机构,包括调入其他公共服务机构、休假、旷工、辞职,被解雇或死亡等方式。一些行政机构在各年度工作报告中进一步指出,低水平的人员配置和人员能力不足是导致行政机构无法有效运行的主要原因。本研究探讨了导致工作和生活冲突的主要因素、冲突的发生对员工福利的影响以及加纳公务员为确保工作生活的平衡而采取的应对策略。本研究主要分为五个部分。第一章围绕研究背景展开,包括文献综述、研究目的和意义、研究问题和假设、研究范围以及研究局限性。第二章主要为相关理论,包括定义关键词、工作与生活平衡的两个主要观点、解决个人和组织关系冲突的措施。第三章主要讨论了数据收集的方法、数据框架的确定和数据收集的程序。其中,重点讨论了数据分析过程与研究问题的契合性。第四章论述了研究现状和研究结果分析,并围绕本研究中的主题和子题对目标和假设进行概述。最后,第五章主要为研究成果、结论、建议和局限性。本研究的主要目的在于让人们更加注重平衡工作和生活,也为处在工作生活冲突中的加纳公务员提供解决对策。对相关问题的研究有助于公共意识的树立,并帮助决策者找到解决冲突的长远办法。也就是说,通过本研究中提供的解决对策能够更好的管理工作和生活中的冲突,从而提升加纳公务员的个人发展空间,提高生活满意度。本研究为加纳公务员体系中的决策者留住优秀的员工提供了方法,也为相关问题的进一步研究提供了基础。本研究采用横向定量研究方法来分析所获的一手和二手数据。通过设计结构化调查问卷以获取调查对象的意见等定量数据。抽样过程中采用了概率抽样和非概率抽样相结合的方法调查问卷中的主要调查对象加纳公务员。由于时间和资源有限,在抽样的第一阶段,采用便利抽样方法从24个公共部门中仅随机抽取了3个。定额抽样保证了所选样本的代表性。利用便利抽样对贸易、卫生和金融这三个部门的300名受访者进行了结构化问卷调查。由于受访者在办公环境中繁忙的职业性质和角色,所以选取便利抽样方法对符合标准并愿意配合的受访者进行了调查。调查问卷分为四个部分。第一部分主要用来收集调查对象的基本信息和专业背景。第二部分则侧重于获取导致工作和生活产生冲突的诱因。这些诱因对身体健康/福利、生活和家庭满意度、工作满意度的影响将放在调查问卷的第三部分进行介绍。而问卷的最后一部分则询问了调查对象采用何种个人干预的措施和组织支持系统以确保生活和工作的平衡。通过SPSS Statistics version23对收集的数据进行了修正、总结和分析,在分析图表中以频率和百分比的形式对结果进行描述和推论。这项研究的结果是从随机选取的三个公共部门中的279名调查对象的回答中得出的。通常通过获取工作对他们身心健康的影响程度来衡量冲突的影响。并进一步利用生活满意度、家庭满意度以及工作满意度等来测量加纳公务员的心理健康状况。使用推断统计工具,如独立t检验和单向方差分析来检验所述假设的统计显着性。独立t检验可以帮助确定是否所有的公务员不管职级如何都遭受过来自工作和生活不平衡的压力。通过对正太假设的评估发现,由于方差和样本数量不匹配,发现这些假设不成立。因此,对均值的可靠性检验取决于是否采用Welch和Brown Forsythe统计来检验假设的因变量。进行第二次独立样本的t检验的目的在于确定是否工作生活冲突对加纳公务员队伍中所有的公务员有相似的影响。在对这一假设进行测试时,比较了冲突对工作满意度、家庭生活满意度和身体健康所产生的影响,并且将这些结果在加纳部门级和普通员工之间进行了比较。在测试假设三时重复了第三项测试,该假设旨在确定是否所有公务员都根据他们的工作经历采取了相似的个人应对措施,以确保工作生活的平衡。运用单因素方差分析来检验假设四,检验在三个样本部门中是否把组织支持作为一种应对策略。这有助于确定在不同的行政机构在应对公务员工作和生活冲突的不利影响时的响应速度及响应程度。分析结果显示,在家庭和工作生活中表现出不兼容的角色容易导致家庭和工作之间的冲突。加纳公务员在工作和生活上的冲突主要源于完成工作所需的资源/后勤资源的不足、工作承诺不足、工作地距离住所较远、执行特定职责的能力不足、同事之间缺乏相互扶持和较长的工作时间等。这项研究进一步显示工作与家庭冲突的发生率随着职位

关键词：工作生活冲突工作生活平衡工作满意度

Sugar and Spice, and Everything Nice： Do Female Stereotypes Supersede In-group Favoritism Among Men When Evaluating Female Criminal Suspects in News Stories？

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Journalism and Mass Communication 2017年第4期7卷 165-186页

作者： osei Appiah Lanier Holt Tiffany White Katie Dale The Ohio State University Columbus Ohio U.S. University of Georgia Athens Georgia U.S. Florida State University Tallahassee Florida U.S.

Some scholars argue that stereotypes of women as docile and non-violent result in women receiving leniency from the public compared to men who commit identical crimes. However, others assert that women who commit violent crimes violate traditional gender roles, which can lead the public to evaluate them more harshly than their male counterparts. More than 900 adults read news stories about either a woman abusing a man or a man abusing a woman before evaluating the criminal suspect. Female participants showed in-group favoritism towards criminal suspects that matched their gender. Conversely, male participants did not show a preference for their in-group. Overall, both male and female participants were more likely to believe the crime was justified, have more sympathy for the criminal suspect, assign less jail time, and have a more positive attitude towards the suspect when the criminal suspect was female vis-a-vis male. These findings were more pronounced when there was a non-fatal crime compared to a crime involving a fatality. Chivalry hypothesis and social identity theory are discussed.

关键词： race gender crime chivalry social identity theory news domestic abuse

Characterization of African Eggplant for Morphological Characteristics

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Journal of Agricultural Science and Technology 2010年第3期4卷 33-37页

作者： M. K. osei B. Banful C. K. osei M. O. Oluoch CSIR-Crops Research Institute P.O. BOX 3785 Kumasi Ghana Faculty of Agriculture Kumasi Kwame Nkrumah University of Science and Technology Ghana A VRDC-The World Vegetable Center Regional Center for Africa P.O. BOX 10 Duluti Arusha-Tanzania

Systematic characterization of available crop varieties using morphological traits is needed to fuel breeders＇ efforts in African eggplant. Twenty-eight accessions of African eggplant from three species of Solanum aethiopicum （16）, Solanum macrocarpon （9） and Solanum anguivi （3） were characterized using standard morphological descriptors. The experiment was laid out in Randomized Complete Block Design （RCBD） with three replications. The results indicated distinct and wide variations between the three Solanum species studied. There were however a lot of similarities between the S. aethiopicum and S. anguivi lines. This suggests the two materials being closer to each other than they are to the S. macrocarpon.

关键词： Landraces traits variation African eggplant morphological characterization

Unveiling silent stories of women with stillbirth at Shai Osudoku District Hospital

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Gynecology and Obstetrics Clinical Medicine 2024年第3期4卷 153-159页

作者： Ophelia Nkansah Evans Appiah osei Doris Richardson Awube Menlah Ghana College of Nurses and Midwives AccraGhana Purdue University West LafayetteIndianaUSA Department of Nursing Valley View UniversityOyibiGhana

Background Stillbirth remains a prevalent issue worldwide,particularly affecting low-income and middle-income countries,where it brings immense sorrow and suffering to families,especially ***,support for women coping with this loss is inadequate,particularly in regions like Africa,where literature on women's experiences of stillbirth is *** This qualitative study employed a narrative design guided by William Worden's Four Task Theory to explore the experiences of 15women who had experienced stillbirth,selected through purposive *** interviews were conducted face to face with participants,and thematic analysis was used to analyse the *** The study identified three overarching themes and nine subthemes,revealing participants'perspectives on factors contributing to stillbirth,the experiences of women dealing with this loss and their accounts of the care provided by healthcare professionals focusing on communication,response and logistical *** Mothers revealed a multitude of challenges following the loss,underscoring the imperative of providing them with essential support to navigate these *** research should delve into coping strategies and interventions aimed at enhancing the coping mechanisms of these mothers.

关键词： income mother birth

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基于小波变换的遥感纹理信息提取

吉林大学学报（地球科学版） 2004年第3期34卷 481-483页

作者：邢立新孟治国 M.osei Edward 吉林大学地球探测科学与技术学院吉林长春130026

遥感纹理信息是地物空间特征的综合反映,综合纹理信息是进行专题信息提取获取的重要依据。遥感数据具有复杂性、统计性和随机性,同时,遥感图像中地学信息,如地质构造、蚀变信息及岩性分界等高频信息具有一定的方向性;小波变换具有"变焦... 详细信息

遥感纹理信息是地物空间特征的综合反映,综合纹理信息是进行专题信息提取获取的重要依据。遥感数据具有复杂性、统计性和随机性,同时,遥感图像中地学信息,如地质构造、蚀变信息及岩性分界等高频信息具有一定的方向性;小波变换具有"变焦性"、对称性、正则性等特点,可以较为快速地检测到奇变信号。利用小波变换可以快速、有效地提取遥感纹理高频奇变信息。

关键词：小波变换纹理信息信息提取

Risk stratification prior to major hepatectomy

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Hepatobiliary Surgery and Nutrition 2024年第5期13卷 898-900页

作者： Daniel C.osei-Bordom Robert P.Sutcliffe Liver Unit Queen Elizabeth HospitalBirminghamUK

Post-hepatectomy liver failure(PHLF)is an uncommon but potentially life-threatening complication after major hepatic *** mild cases of PHLF are self-limiting,clinically significant PHLF[International Study Group of Liver Surgery(ISGLS)grades B or C]may be associated with multi-organ failure and sepsis and carries a high *** is no proven treatment for PHLF,and its management is essentially supportive,including timely diagnosis and treatment of septic or vascular complications and organ support for associated renal,respiratory or cardiovascular *** the absence of any evidence-based interventions that may improve PHLF outcomes,liver surgeons have focussed on preoperative risk assessment and development of risk mitigation *** dominant risk factors for PHLF are extent of resection and background liver function,which have been incorporated into several risk scores(1,2).Patients who undergo resection or four or more segments(i.e.,right hemihepatectomy or extended left/right hemihepatectomy)or those with underlying liver disease(e.g.,fibrosis,cirrhosis or chemotherapy-associated liver disease)are at particular risk of PHLF.

关键词： Prediction models liver resections post-hepatectomy liver failure(PHLF)