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Journal of Forestry Research 2021年第4期32卷 1361-1372页

作者： p.addo-fordjour E.K.Boakye Z.B.Rahmad Department of Theoretical and Applied Biology College of ScienceKwame Nkrumah University of Science and TechnologyKumasiGhana School of Biological Sciences Universiti Sains Malaysia11800 USM Pulau PinangMalaysia

We determined the response of tree community structure to logging disturbance and topography,and the patterns of tree-habitat associations in Tano Offin Forest Reserve,*** sampled trees in 27 20 m× 20 m plots randomly and equally distributed in three topographic habitats(slope,valley,and hilltop) in each of two forests:logged and *** topographic features,altitude and degree of slope,were measured and related with species ***,there were significant effects of logging and topographic habitat and their interaction on species diversity and composition,with the unlogged forest and valley habitat supporting higher *** diversity varied among the topographic habitats in the logged but not in the unlogged *** were topographic effects on abundance of individual species but not on tree community abundance and basal *** and its interaction with topographic habitat showed significant effects on tree abundance and basal *** species were associated with specific topographic habitats or a combination in the logged and unlogged ***,the patterns of habitat associations of the species differed between the logged and unlogged forests.

关键词： Altitude Community structure Disturbance Habitat heterogeneity Slope Topographic position

Impacts of forest management on liana diversity and community structure in a tropical forest in Ghana:implications for conservation

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Journal of Forestry Research 2016年第1期27卷 147-153页

作者： p.addo-fordjour Z.B.Rahmad A.M.S Shahrul M.Ashyraf School of Biological Sciences Universiti Sains Malaysia Department of Theoretical and Applied Biology College of Science Kwame Nkrumah University of Science and Technology (KNUST) The Centre for Marine and Coastal Studies (CEMACS) Universiti Sains Malaysia

We studied the impacts of liana cutting as a forest management tool on liana diversity （species richness, Shannon diversity index） and community structure （diam- eter distribution, basal area, species dominance） in the Asenanyo Forest Reserve, Ghana. Two types of silvicul- turally treated forests were studied： Logging treated （LT） and Tropical Shelterwood System （TSS） treated forests. An untreated primary forest was included as a control, result- ing in three forest management systems. Lianas with diameter 〉2 cm were identified in ten 40 × 40 m2 plots within each management system. Liana cutting signifi- cantly reduced liana species richness, Shannon diversity index, and basal area in the LT forest after two decades. However, liana species richness and basal area werecomparable in the TSS treated and untreated forests, indi- cating significant recovery in the former after over six decades. Sφrensen similarity index of liana species com- position between the untreated forest and each of the treated forests was moderate. Our findings suggest that liana cutting most likely influenced the dominance of some liana species. In view of the adverse impact of blanket liana cutting on liana diversity, selective liana cutting is rec- ommended as a means of controlling liana numbers while maintaining liana diversity.

关键词： Forest management system Liana diversity Liana basal area Silviculture Tropical forest biodiversity

Effects of human disturbance on liana community diversity and structure in a tropical rainforest, Malaysia: implication for conservation

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Journal of plant Ecology 2012年第4期5卷 391-399页

作者： patrick addo-fordjour Zakaria B.Rahmad A.M.S.Shahrul School of Biological Sciences Universiti Sains MalaysiaPenangMalaysia

Aim Due to the important role of lianas in the functioning of forest ecosystem,knowledge of the factors that affect them are important in the management of ***,there are conflicting reports on the response of liana communities to disturbance,calling for more research in the *** present study was carried out to investigate the response of liana diversity and structure to human disturbance within two major forests in the penang National park,*** study also looked at the implication of the findings for *** A total of 15 40×40-m^(2)(or 40-m×40-m)plots each were randomly located across a range of habitats in a primary forest and disturbed secondary *** with diameter at breast height≥10 cm were examined for lianas with diameter≥2 *** lianas and trees were enumerated and compared between the two *** and structural variables of lianas were compared between the two forests using the t-test *** abundance was also compared between the two forests with t-test,while linear regression analysis was run to determine the effects of tree abundance on liana *** Findings A total of 46 liana species belonging to 27 genera and 15 families were identified in the *** disturbance significantly reduced liana species richness and species diversity in the secondary *** abundance remained the same in both forests whereas liana basal area was;7 times higher in the primary *** and hook climbers were significantly more abundant in the primary and secondary forest,*** diameter lianas were more abundant in the primary forest compared with the secondary *** diameter distribution of most families in the primary forest followed the inverted J-shaped curve whereas only a few of the families in the secondary forest did *** abundance was significantly higher in the primary *** abundance of lianas significantly depended on tree abundance in all the f

关键词： climbing mechanism conservation liana diversity and structure human disturbance

Intercontinental comparison of liana community assemblages in tropical forests of Ghana and Malaysia

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Journal of plant Ecology 2017年第6期10卷 883-894页

作者： patrick addo-fordjour Zakaria B.Rahmad Robyn J.Burnham School of Biological Sciences Universiti Sains Malaysia11800 Pulau Pinang PenangMalaysia Department of Theoretical and Applied Biology College of ScienceKwame Nkrumah University of Science and Technology(KNUST)KumasiGhana Department of Ecology and Evolutionary Biology University of MichiganAnn ArborMI 48109-1079USA

Aims Liana research has increased in the past two decades,yet there is still inadequate comparison of liana communities at a cross-con-tinental *** compared liana assemblages in tropical forest ecosystems of Ghana and Malaysia,thereby determining patterns and mechanisms that are common or unique to the *** Liana diversity,community structure and taxonomic composition were determined in 60 plots of 40×40 m2 in three forest types(primary,disturbed secondary,selectively logged)in each biogeo-graphic *** traits,climbing mechanisms and dispersal modes were determined for all species and individuals via direct field observation and with published *** were analyzed at biogeographic(using combined forest data)and forest-type *** Findings Both observed and rarefied-extrapolated species richness of lianas were significantly higher in Ghanaian forests compared to Malaysian *** most cases,species diversity indices(Shannon diversity index,Margalef,Fisher’s alpha)showed significantly higher liana diversity at Ghanaian forests at biogeographic and forest-type ***,Ghanaian forests harbored significantly higher values of liana abundance and basal area than Malaysian forests at both biogeographic and forest-type *** taxonomic composition of lianas differed considerably between the two biogeographic areas at all levels,although similarity in composition increased at generic and family *** above-ground biomass of lianas was simi-lar between the two biogeographic regions,variations occurred at forest-type level between the two *** two biogeographic areas showed some similarities in assemblages of liana climbing *** more species of lianas were adapted for animal dispersal than other dispersal modes in both countries,the majority of liana individuals in Ghana were wind dispersed whereas the majority of liana individuals in Malaysia were animal *** speculate that the differ

关键词： biogeographic region climbing mechanisms dispersal modes intercontinental patterns liana diversity liana community structure

The Determinants of the Inflows of Foreign Direct Investment in Ghana

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The Determinants of the Inflows of Foreign Direct Investment...

作者： Christian Owusu-fordjour 山东大学

学位级别：硕士

本研究的核心目标是观察外国直接投资(FDI)在加纳的最重要决定因素。本研究利用1980-2017年间加纳的FDI、人均GDp、贸易开放度、宏观经济稳定度、政府消费支出、汇率、自然资源禀赋和利率的时间序列年数据。然而,发现一个国家的贸易开... 详细信息

本研究的核心目标是观察外国直接投资(FDI)在加纳的最重要决定因素。本研究利用1980-2017年间加纳的FDI、人均GDp、贸易开放度、宏观经济稳定度、政府消费支出、汇率、自然资源禀赋和利率的时间序列年数据。然而,发现一个国家的贸易开放度和市场规模、自然资源、基础设施、政府支出和消费的程度和水平、经济增长和利率制度是加纳FDI流入的主要决定因素。综上所述,外国直接投资(FDI)在加纳的大部分被转移到矿业和石油天然气行业,损害了加纳经济增长的主要驱动力,因此,FDI对加纳经济增长和发展的作用变得不那么有效。加纳吸引外国直接投资(FDI)取决于上述主要因素。因此,研究表明,加纳政府必须创造和创造一个有利于外国直接投资的社会经济和政治氛围。再次,政府必须通过多种技术渠道向世界展示国家的投资潜力,因此,加纳投资促进中心(GIpC)和自由区委员会(FZB)是政府在吸引外国直接投资方面值得称赞的创新。

关键词：外国直接投资外国直接投资的主要决定因素经济增长国内生产总值增长加纳

Optimal control application to an Ebola model

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Asian pacific Journal of Tropical Biomedicine 2016年第4期6卷 283-289页

作者： Ebenezer Bonyah Kingsley Badu Samuel Kwesi Asiedu-addo Department of Mathematics and Statistics Kumasi Polytechnic Noguchi Memorial Institute for Medical Research College of Health ScienceUniversity of Ghana Faculty of Health Sciences Garden City University College Department of Mathematics Education University of Education

Ebola virus is a severe,frequently fatal illness,with a case fatality rate up to 90%.The outbreak of the disease has been acknowledged by World Health Organization as public Health Emergency of International *** threat of Ebola in West Africa is still a major setback to the socioeconomic *** control theory is applied to a system of ordinary differential equations which is modeling Ebola infection through three different routes including contact between humans and a dead *** an attempt to reduce infection in susceptible population,a preventive control is put in the form of education and campaign and two treatment controls are applied to infected and late-stage infected(super) human *** pontryagins maximum principle is employed to characterize optimality control,which is then solved *** is observed that time optimal control is existed in the *** activation of each control showed a positive reduction of *** overall effect of activation of all the controls simultaneously reduced the effort required for the reduction of the infection *** obtained results present a good framework for planning and designing cost-effective strategies for good interventions in dealing with Ebola *** is established that in order to reduce Ebola threat all the three controls must be taken into consideration concurrently.

关键词： Ebola Optimal control pontryagins maximum principle Case finding Case holding

Study on Adsorption of Cu2+,pb2+and Zn2+by Natural Bentonite

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Study on Adsorption of Cu2+,Pb2+and Zn2+by Natural Bentonite

作者： Olivia addo-Bankas 西南科技大学

学位级别：硕士

The adsorption properties of clay minerals have been studied extensively in recent years,from the studies,montmorillonites have been considered as effective in the removal of metal ions from aqueous *** this thesis,the use of natural bentonite for the adsorption of copper（Cu2+）,lead（pb2+）and zinc（Zn2+）ions from aqueous solution was *** of the bentonite clay interactions responsible for adsorption was studied using x-ray diffraction（XRD）,surface area and pore size（BET）,infrared spectroscopy（FT-IR）,SEM（Scanning electron microscope）,and x-ray fluorescence（XRF）.In this study,nitrate salts of copper,lead and zinc were used to prepare adsorbate solutions of Cu2+,pb2+ and Zn2+.Batch adsorption experiment was used to determine the removal efficiencies of mixture of the target metals by bentonite clay with respect to operating conditions such as pH,metal concentration,and contact *** studies was conducted at different metal concentrations,with pH,contact time,rotary speed and temperature constant at 4,60 min,150 RMp and 25 □.The results of the equilibrium studies indicated a high efficiency of bentonite in the removal of pb2+,Cu2+and Zn2+ions,with the highest removal for Cu2+ pb2+and Zn2+being 98.59%,97.76%and 96.15%at optimum initial concentrations of 10 mg/L,15 mg/L and 10 mg/L *** to correlation coefficient,the obtained adsorption process could be better described with Langmuir isotherm *** maximum adsorption capacity of clay for Cu2+,Zn2+and pb2+ions fitted with Langmuir isotherm was found to be 2.4,2.9 and 2.8 mg/g *** time studies were conducted using 60 mins to 300 *** results for 60 mins showed the highest%removal for all three metals with Cu2+recording 98.59%adsorption removal efficiency,pb2+having 96.81%and Zn2+with 96.15%.The results in the paper proposed the potential role of natural bentonite clay obtained from Santai,China in wastewater treatment processes as an affordable,

关键词： Waste Water Treatment Bentonite Heavy Hetals Adsorption

Unlocking hypoglycemia–associated brain microvascular dysfunction:critical insights from proteomic analysis

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Neural Regeneration Research 2025年第6期20卷 1707-1708页

作者： Siva S.V.p.Sakamuri Anil Sakamuri Department of Chemistry Auburn University at MontgomeryMontgomeryALUSA Vascular Biology Center and Department of Medicine Medical College of Georgia at Augusta UniversityAugustaGAUSA

Hypoglycemia-a critical complication linked to worsened brain function in diabetic subjects:Hypoglycemia is characterized by a decline in circulatory glucose levels below sta nda rd physiological *** hypoglycemia,classified as level 1 hypoglycemia,is defined by blood glucose levels below 70 mg/dL and can be effectively addressed through carbohydrate *** hypoglycemia,denoted by blood glucose levels less than 54 mg/dL,poses a life-threatening risk if left *** with type 1 and type 2 diabetes undergoing insulin treatment are particularly susceptible to hypoglycemia due to impaired counterregulatory mechanisms.

关键词： impaired intake critical

Seroconversion of HBsAG coincides with hepatitis A superinfection: A case report

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World Journal of Clinical Cases 2020年第9期8卷 1651-1655页

作者： Claudia Beisel Marylyn M addo Julian Schulze zur Wiesch Department of Internal Medicine Division of Infectious DiseaseUniversity Medical Center Hamburg-EppendorfHamburg 20251Germany German Center for Infection Research Hamburg 20251Germany

BACKGROUND Hepatitis B virus(HBV)is a hepatotropic virus that can cause acute and chronic liver *** to the world health organization 257 million people are infected with chronic HBV infection ***-infection with other hepadnaviruses,including hepatitis A virus(HAV),hepatitis C virus,hepatitis D virus,and hepatitis E virus is associated with increased risk of acute liver failure in patients with chronic *** SUMMARY Here,we report a case of a 47-year old male patient with HBV-related compensated Child A cirrhosis,who presented with general fatigue,malaise and laboratory signs of acute *** the patient was regularly seen at a specialized university liver unit,the HAV vaccination status was *** HAV super-infection was diagnosed by positive serological and polymerase chain reaction *** acute HAV super-infection,spontaneous HBsAg elimination and development of an anti-HBs titer were *** This case illustrates the importance of carefully checking the vaccination *** our patient,unspecific immunological responses to HAV led to functional cure of HBV.

关键词： Chronic hepatitis B infection Liver cirrhosis Acute hepatitis A infection HBsAg clearance Functional cure Case report

Leveraging patient Loyalty for the Sustainability of Health Institutions in West Africa:The Role of Medical and Nonmedical Services

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Leveraging Patient Loyalty for the Sustainability of Health ...

作者： ASABEA addo ANTOINETTE 江苏大学

学位级别：硕士

近十年来,服务业竞争的加剧和环境的不利因素使得服务质量成为服务提供者和研究者关注的焦点。这方面的一个关键领域是如何确保顾客持续的惠顾（忠诚度）。在医疗领域,患者满意度被认为是卫生保健的首选结果之一,因为它直接关系到卫生... 详细信息

近十年来,服务业竞争的加剧和环境的不利因素使得服务质量成为服务提供者和研究者关注的焦点。这方面的一个关键领域是如何确保顾客持续的惠顾（忠诚度）。在医疗领域,患者满意度被认为是卫生保健的首选结果之一,因为它直接关系到卫生服务的再使用和卫生机构的成功。在许多研究中引用的解释变量中,关键是围绕服务提供的指标。然而,这一领域的研究还处于起步阶段,针对发展中国家的研究较少。事实上,发达国家和发展中国家的动态是不同的。因此,本文在一些选定的西非国家考察了医疗人员提供的服务质量和卫生设施的非医疗方面及其对患者满意度和忠诚度的影响。在方法上,本文采用了计量经济学模型和结构方程模型的原理进行分析。在结构方程模型中,本研究的实证结果显示,医务人员（医生、药师、实验室技术人员）的服务质量通过患者满意度的中介作用对患者忠诚度有正向影响。在计量经济学模型中,从DOLS和FMOLS估计推断,在FMOLS模型中,人力资源充足性、卫生设施基础设施、设备和资源增加1%,以及遵守卫生协议,分别导致患者忠诚度增加1.75%、3.03%、3.26%和1.16%。同样,DOLS模型表明,人力资源充足性、卫生设施基础设施、设备和资源以及卫生协议的遵守程度每增加1%,患者的忠诚度就分别增加1.54%、4.12%、3.47%和1.58%。因此,研究结果表明,卫生设施和基础设施、设备和资源、人力资源充足程度以及遵守卫生协议对任何卫生机构提供的服务质量都有积极和重大的影响。总之,应更加重视医务人员的服务和服务质量指标,以确保为患者提供优质服务和这些发展中国家卫生设施的可持续性。论文建议卫生机构定期对其工作人员进行在职培训,使他们了解当前的做法,以确保病人的满意度和忠诚度,并将行为良好的工作人员的激励方案制度化。同样,应遵循例行检查和维修计划,防止对医疗设备和资源造成损害。最后,卫生设施应遵守标准的卫生议定书,以确保提供高质量的保健。本论文的研究结果可能引起机构管理、决策者以及消费者满意度和忠诚度领域的研究人员的兴趣,特别是在卫生部门的相关人员。本研究将提供非传统的成本效益的方法,影响患者的满意度和忠诚度。

关键词：医疗服务西非卫生机构患者忠诚度