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Absence of postzygotic isolating mechanisms:evidence from experimental hybridization between two species of tropical sea urchins

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Journal of Zhejiang University-Science B(Biomedicine & Biotechnology) 2012年第10期13卷 797-810页

作者： M.Aminur RAHMAN Tsuyoshi UEHARA Aziz ARSHAD fatimah Md.YUSOFF Mariana Nor SHAMSUDIN Laboratory of Marine Biotechnology Institute of BioscienceUniversiti Putra Malaysia43400 UPM SerdangSelangorMalaysia Department of Chemistry Biology and Marine ScienceFaculty of ScienceUniversity of the Ryukyus1 SenbaruNishihara-choOkinawa 903-0213Japan Department of Aquaculture Faculty of AgricultureUniversiti Putra Malaysia43400 UPM SerdangSelangorMalaysia

Two reef margin species of tropical sea urchins,Echinometra sp.C(Ec) and Echinometra oblonga(Eo),occur sympatrically on Okinawa intertidal reefs in southern *** between these species was examined through a series of cross-fertilization *** limited sperm concentrations,where conspecific crosses reached near 100% fertilization,both heterospecific crosses showed high fertilization rates(81%-85%).The compatibility of the gametes demonstrated that if gamete recognition molecules are involved in fertilization of these species,they are not strongly *** found that conspecific crosses reached peak fertilization levels much faster than did heterospecific crosses,indicating the presence of a prezygotic barrier to hybridization in the *** survival,metamorphosis,and juvenile and adult survival of hybrid groups were nearly identical to those of their parent *** from crosses in both directions developed normally through larval stages to sexually mature adults,indicating that neither gametic incompatibility nor hybrid inviability appeared to maintain reproductive isolation between these *** adults,Ec×Ec crosses gave the highest live weight,followed by Eo(ova)×Ec(sperm),Ec(ova)×Eo(sperm),and Eo×*** growth performance measures(viz.,test size,Aristotle's lantern length,and gonad index) of hybrid groups and their parental siblings showed the same *** phenotypic color patterns of the hybrids were closer to the maternal coloration,whereas spine length,tube-foot and gonad spicule characteristics,pedicellaria valve length,and gamete sizes showed intermediate *** F 1 hybrids were completely fertile and displayed high fertilization success in F 1 backcrosses,eliminating the likelihood that hybrid sterility is a postzygotic mechanism of reproductive ***,intensive surveys failed to find hybrid individuals in the field,suggesting the lack or rarity of natural *** stron

关键词： Sea urchins Echinometra Hybridization Gamete compatibility Reproductive isolation Speciation

IVlelatonin ameliorates the adverse effects of leptin on sperm

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Asian Journal of Andrology 2017年第6期19卷 647-654页

作者： Fayez A Almabhouh Khairul Osman Siti fatimah Ibrahim Sergey Gupalo Justin Gnanou Effendi Ibrahim Harbindar Jeet Singh Faculty of Medicine Universiti Teknologi MARA Sg Buloh Campus 47000 Sg Buloh Selangor Malaysia Faculty of Allied Health Sciences Universiti Kebangsaan Malaysia Jalan Raja Muda Kuala Lumpur Malaysia Faculty of Medicine and Defence Health National Defence University of Malaysia Kem Sungai Besi 57000 Selangor Malaysia IMMB Faculty of Medicine Universiti Teknologi MARA Sg Buloh Campus 47000 Sg Buloh Selangor Malaysia PPerForM Universiti Teknologi MARA Sg Buloh Campus Selangor Malaysia.

This study examined the effects of melatonin on leptin-induced changes in sperm parameters in adult rats. Five groups of Sprague-Dawley rats were treated with either leptin or leptin and melatonin or melatonin for 6 weeks. Leptin was given daily via the intraperitoneal route （60 μg kg-1 body weight） and melatonin was given in drinking water （10 mg kg-1 or 20 mg kg-1 body weight per day）. Upon completion, sperm count, sperm morphology, 8-hydroxy-2-deoxyguanosine, Comet assay, TUNEL assay, gene expression profiles of antioxidant enzymes, respiratory chain reaction enzymes, DNA damage, and apoptosis genes were estimated. Data were analyzed using ANOVA. Sperm count was significantly lower whereas the fraction of sperm with abnormal morphology, the level of 8-hydroxy-2-deoxyguanosine, and sperm DNA fragmentation were significantly higher in rats treated with leptin only. Micmarray analysis revealed significant upregulation of apoptosis-inducing factor, histone acetyl transferase, respiratory chain reaction enzyme, cell necrosis and DNA repair genes, and downregulation of antioxidant enzyme genes in leptin-treated rats. Real-time polymerase chain reaction showed significant decreases in glutathione peroxidase 1 expression with increases in the expression of apoptosis-inducing factor and histone acetyl transferase in leptin-treated rats. There was no change in the gene expression of caspase-3 （CASP-3）. In conclusion, the adverse effects of leptin on sperm can be prevented by concurrent melatonin administration.

关键词： 8-hydroxy-2-deoxyguanosine DNA fragmentation leptin melatonin sperm

Teachers’ Awareness Regarding Emergency Management of Epistaxis inside the School;Alahssa, Saudi Arabia

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Open Journal of Preventive Medicine 2018年第2期8卷 44-55页

作者： fatimah Alshehri fatimah Alluwaim Khalid Alyahya Faculty of Medicine King Faisal University Al-Hassa KSA

Background: Epistaxis is one of the commonest emergencies encountered by ENT physicians as well as to family and emergency physicians. It is common among school children as they are easily injured during different school activities. Objective: The aim of this study was to assess the level of knowledge and attitude regarding first aid management of epistaxis among school teachers in Al-Ahsa, Saudi Arabia. Method: A cross sectional study was conducted in November 2017 among Saudi school teachers in AlAhssa region, Kingdom of Saudi Arabia. The data were collected by a well-structured online questionnaire which was designed including questions about the biographical data of the teacher, questions about the past knowledge of the emergency management of epistaxis and questions assessing the awareness of the method applied as a management of epistaxis. Result: We received 485 valid responses. 76% of teachers were female, 93% worked in public and 40% were in primary schools. 54% of participants had received information about first aid to stop nose bleeding or hemorrhage. 67% said that their students experienced epistaxis before. Interestingly, 15% said they would not try to stop the bleeding, and only 25% said they would press on the cartilaginous part of nose. However, a higher percentage (57%) knew that they should tilt the head forward.

关键词： Epistaxis Epistaxis in School Awareness Management Al-Ahssa

Challenges of Privacy in Cloud Computing

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Journal of Computer and Communications 2022年第12期10卷 51-61页

作者： fatimah Khalil Aljwari Computer Science Department Umm Al Qura University Makkah Saudi Arabia

Now, cloud computing has grown from being a business concept to one of the fastest-growing segments of the information technology industry. Cloud computing is a group of resources, hardware, software, and services offered through the Internet or the network. Cloud also consists of five important characteristics, three service models and four deployment models. From the consumers’ perspective, concerns about cloud computing security remain the essential inhibitors for cloud computing services, precisely related to the security and privacy issues of data in the cloud. This essay will go over. These difficulties include user data loss, data leakage, and privacy disclosure. A variety of cloud computing and service models are applied to boost an organization’s investment returns, profit, and financial growth. For companies or governmental agencies to operate on the cloud, cloud computing offers a suitable environment and additional benefits or advantages. As a result, it has a number of problems with data security and privacy. The user’s data are kept off-site and maintained by third parties. The consumers of cloud computing might be happy if the data are shielded from illegal access and misuse. Organizations and people who use the cloud are affected by the failure in data protection, which results in many challenges and problems, such as data theft. Concerns about privacy are also developing as “cloud computing” develops quickly and expands. For Open Systems and Internet applications, privacy has remained a touchy subject;the cloud suffers when discussing privacy. Adopting cloud computing services is only difficult because of privacy and security concerns. The challenges and solutions for cloud users and providers related to privacy and security are covered in this article. The document will provide researchers and security experts with information on privacy and security difficulties and solutions.

关键词： Challenges Cloud Computing Privacy Saudi Arabia

Development of anti-corrosive coating on AZ31 Mg alloy subjected to plasma electrolytic oxidation at sub-zero temperature

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Journal of Magnesium and Alloys 2022年第7期10卷 1915-1929页

作者： S.fatimah M.P.Kamil D.I.Han W.Al-Zoubi Y.G.Ko Materials Electrochemistry Group School of Materials Science and EngineeringYeungnam UniversityGyeongsan 38541Republic of Korea

Plasma electrolytic oxidation(PEO)is a promising surface treatment to generate adherent and thick anti-corrosive coating on light-weight metals(Al,Mg,Ti,etc.)using an eco-friendly alkaline *** energy plasma,however,inevitably generates porous structures that limit their practical *** present study proposes a straight-forward simple method by utilizing sub-zero electrolyte(268 K)to alter the plasma characteristics during formation of the protective coating on AZ31 Mg alloy via PEO with a comparison to the electrolyte at room temperature(298 K).In refrigerated electrolyte,the formation of micro-defects is suppressed relatively at the expense of low coating growth,which is measured to be twice lower than that at 298 K due to the temperature-dependent soft plasma discharges contributing to the development of the present *** a consequence,corrosion resistance of the sample processed at 268 K is superior to that of 298K,implying that the effect of coating thickness is less dominant than that of *** phenomenon is interpreted in relation to the ionic movement and oxide solidification controlled by soft plasma discharges arising from the temperature gradient between electrolyte and surface of the substrate during PEO.

关键词： AZ31 Mg alloy Plasma electrolytic oxidation Sub-zero electrolyte Anti-corrosive coating Corrosion

Emotionally Intelligent among Nurses and Nursing Managers: An Integrative Review

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Open Journal of Nursing 2022年第10期12卷 643-649页

作者： fatimah Hassan Suwaidi General Directorate of Health Affairs Aseer Region KSA

Background: Emotionally intelligent managers are able to use, understand and manage their feelings in a way that benefits themselves and others. Aim: The main aim of this integrative review is to assess the level of emotional intelligence among nurse managers within current literature and previous studies. Materials and Methods: An integrative review was conducted;a search was performed in the electronic databases (ISI, SCOPUS, Ovid, Proquest, Google Scholar, PubMed, and SID) for articles, which were published in the period 2002-2020 in English. Nine studies met the inclusion criteria. Results: Of 840 articles, and after exclusion criteria;Nine articles only were met the inclusion criteria. Of these eight studies, the majority found an average level of emotional intelligence among nurse managers and nurses. Conclusion: It is evident that the nurses are able to experience the ability to identify and experience a wide range of emotions in everyday practice. Despite the satisfactory level of emotional intelligence among nurses, they have to improve their skills to achieve maximum level of these skills of emotional intelligence.

关键词： Emotionally Intelligent Nurses Nursing Managers

A Literature Review on Sustainability of Bio-Based and Biodegradable Plastics:Challenges and Opportunities

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Energy Engineering 2022年第4期119卷 1611-1647页

作者： Taofeeq D.Moshood Gusman Nawanir fatimah Mahmud Fazeeda Mohamad Mohd Hanafiah Ahmad Airin AbdulGhani Faculty of Industrial Management Universiti Malaysia PahangMalaysia

This study examines the literature on bio-based and biodegradable plastics published between 2000 and 2021 and provides insights and research suggestions for the *** study gathers data from the Scopus and ISI Web of Science databases,then picks 1042 publications objectively and analyses their ***,144 papers from the Web of Science are analysed to present insights and classifications of the literature based on content analyses,including assessment/evaluation of the sustainability of bio-based and biodegradable Plastics,sustainability of biodegradable Plastics,and factors driving the uptake of biodegradable *** study finds that most research on bio-based and biodegradable plastic film evaluations considered only one dimension of sustainability,few considered two dimensions,and very few considered three ***,in recent years,academic and industrial interest has grown dramatically in biodegradable plastics towards *** triple bottom line method in this report(economic benefit,social responsibility,and environmental protection)was employed to assess the biodegradable plastics towards *** journals,Influential authors,top contributing institutions,top contributing nations,and contributions by fields are all identified in this *** research gives a detailed but straightforward theoretical design of bio-based and biodegradable *** study’s results and future research initiatives provide a new path for further investigation and contribution to the field.

关键词： Biodegradable plastic bioplastic influential factors life cycle assessment biopolymers triple bottom line(TBL)

Comparison of tunneling currents in graphene nanoribbon tunnel field effect transistors calculated using Dirac-like equation and Schrodinger’s equation

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Journal of Semiconductors 2019年第6期40卷 43-47页

作者： Endi Suhendi Lilik Hasanah Dadi Rusdiana fatimah A. Noor Neny Kurniasih Khairurrijal Physics of Electronic Material Research Division Universitas Pendidikan Indonesia Bandung 40154 Indonesia Physics of Electronic Material Research Division Institut Teknologi Bandung Bandung 40132 Indonesia Earth Physics and Physics of Complex Systems Research Division Institut Teknologi Bandung Bandung 40132 Indonesia

The tunneling current in a graphene nanoribbon tunnel field effect transistor(GNR-TFET) has been quantum mechanically modeled. The tunneling current in the GNR-TFET was compared based on calculations of the Dirac-like equation and Schrodinger’s equation. To calculate the electron transmittance, a numerical approach-namely the transfer matrix method(TMM)-was employed and the Launder formula was used to compute the tunneling current. The results suggest that the tunneling currents that were calculated using both equations have similar characteristics for the same parameters, even though they have different values. The tunneling currents that were calculated by applying the Dirac-like equation were lower than those calculated using Schrodinger’s equation.

关键词： graphene nanoribbon tunnel field effect transistor tunneling current Schrodinger equation Dirac-like equation

Observed Trends in Extreme Temperature over the Klang Valley, Malaysia

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Advances in Atmospheric Sciences 2019年第12期36卷 1355-1370页

作者： Ahmad Norazhar Mohd YATIM Mohd Talib LATIF fatimah AHAMAD Md Firoz KHAN Mohd Shahrul Mohd NADZIR Liew JUNENG Space Science Centre Institute of Climate ChangeUniversiti Kebangsaan Malaysia43600 BangiSelangorMalaysia Faculty of Science and Natural Resources Universiti Malaysia Sabah88400 Kota KinabaluSabahMalaysia School of Environmental and Natural Resource Sciences Faculty of Science and TechnologyUniversiti Kebangsaan Malaysia43600 BangiSelangorMalaysia Centre for Tropical Climate Change System Institute of Climate ChangeUniversiti Kebangsaan Malaysia43600 BangiSelangorMalaysia Department of Chemistry Faculty of ScienceUniversity of Malaya50603 Kuala LumpurMalaysia

This study investigates the recent extreme temperature trends across 19 stations in the Klang Valley, Malaysia, over the period 2006^-16. Fourteen extreme index trends were analyzed using the Mann-Kendall non-parametric test, with Sen’s slope as a magnitude estimator. Generally, the annual daily mean temperature, daily mean maximum temperature, and daily mean minimum temperature in the Klang Valley increased significantly, by 0.07°C yr^-1, 0.07°C yr^-1 and 0.08°C yr^-1, respectively. For the warm temperature indices, the results indicated a significant upward trend for the annual maximum of maximum temperature, by 0.09°C yr^-1, and the annual maximum of minimum temperature, by 0.11°C yr^-1. The results for the total number of warm days and warm nights showed significant increasing trends of 5.02 d yr^-1 and 6.92 d yr^-1, respectively. For the cold temperature indices, there were upward trends for the annual minimum of maximum temperature, by 0.09°C yr^-1, and the annual minimum of minimum temperature, by 0.03°C yr^-1, concurrent with the decreases in the total number cold days (TX10P), with -3.80 d yr^-1, and cold nights (TN10P), with -4.33 d yr^-1. The 34°C and 37°C summer days results showed significant upward trends of 4.10 d yr^-1 and 0.25 d yr^-1, respectively. Overall, these findings showed upward warming trends in the Klang Valley, with the minimum temperature rate increasing more than that of the maximum temperature, especially in urban areas.

关键词： climate change extreme temperature trend urban environment tropical area