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Olivine and Cr-spinel as indicators of the petrogenesis and partial melting conditions of the high-MgO ultramafic volcanic rocks from NW Ad Dhala Province—yemen

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Acta Geochimica 2021年第4期40卷 532-556页

作者： Mukhtar A.Nasher Murad Ali Department of Geology Faculty of Applied SciencesTaiz UniversityTaizYemen

The high-MgO ultramafic volcanic rocks in the NW Ad Dhala province are classified as meimechite according to the IUGS classification scheme.This province represents the southeastern outcrops of the yemen Volcanic Group(YVG),which constitutes part of the AfroArabian continental large igneous province(LIP) and located within the boundary of the Afar mantle plume.In this study,we present the chemical compositions of olivine and Cr-spinel in meimechite rocks from Bagah Village in NW Ad Dhala province,aiming to characterize the genesis and partial melting conditions and to estimate the crystallization temperatures of these high-MgO rocks.Olivine crystals are characterized by high forsterite,ranges from Mg-rich core(up to Fo_(89.69)) to relatively Fe-rich rim(down to Fo_(78.57)),high CaO,MgO and MnO whereas Cr-spinel crystals have high TiO_(2) and Cr# values ranging from 0.49 to 0.63 which indicate that they are crystallized from primary magma and are typical of volcanic olivine and Crspinel that formed in intraplate tectonic setting.Olivine and Cr-spinel compositional data and primary melt composition(MgO ~ 23 wt.%) are compatible with the derivation of studied meimechite rocks from peridotite mantle source by small degrees of partial melting under conditions of high temperature and pressure at great depths,mostly within the garnet stability field.Also,these data provide a compelling indicator for the important role of upwelling Afar mantle plume in the genesis of these high-MgO ultramafic volcanic rocks.Finally,based on the different olivine-liquid equilibrium methods and Al-in-olivine thermometer approach the estimated crystallization temperature ranges from 1450 to 1490℃,and mantle potential temperature(Tp) ranges from 1617 to 1677℃,at high pressure(3-4.8 GPa).These high temperatures substantiate the existence of the Afar thermal mantle plume and its important role in the genesis of the studied meimechite rocks.

关键词： Olivine Cr-spinel High-MgO ultramafic volcanic rocks meimechite Afro-arabian LIP yemen

A community-based survey of Toxoplasma gondii infection among pregnant women in rural areas of Taiz governorate,yemen:the risk of waterborne transmission

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Infectious Diseases of Poverty 2017年第1期6卷 219-224页

作者： Mohammed A.K.Mahdy Lina M.Q.Alareqi Rashad Abdul-Ghani Samira M.A.Al-Eryani Abdullah A.Al-Mikhlafy Abdulsalam M.Al-Mekhlafi Fawzya Alkarshy Rohela Mahmud Tropical Disease Research Center University of Science and TechnologySana’aYemen Department of Parasitology Faculty of Medicine and Health SciencesSana’a UniversitySana’aYemen Department of Parasitology Faculty of MedicineUniversity of Malaya50603 Kuala LumpurMalaysia Department of Community Medicine Faculty of MedicineUniversity of Science and TechnologySana’aYemen yemeni-Swedish Hospital Ministry of Public Health and PopulationTaizYemen

Background:Toxoplasma gondii is a zoonotic coccidian parasite causing morbidity and mortality.In yemen,T.gondii infection has been reported among pregnant women seeking healthcare in the main cities.However,no data are available on the prevalence of T.gondii infection and its associated risk factors among pregnant women in the rural communities of the country.Thus,the present study aimed to determine the seroprevalence of T.gondii and identify its risk factors among pregnant women in the rural communities of Taiz governorate,yemen.Methods:A total of 359 pregnant women living in the rural communities of Taiz governorate were enrolled in this study by house-to-house visits.Data were collected using a pre-designed questionnaire,and blood samples were collected and tested for the detection of anti-T.gondii IgM and IgG antibodies by enzyme-linked immunosorbent assay.Results:The prevalence of T.gondii infection among pregnant women in this study was 46.2%(166/359).Bivariate analysis identified the age of≥30 years(odds ratio[OR]=1.7;95%confidence interval[CI]=1.09-2.65,P=0.019)and unimproved water sources(OR=2.2;95%CI=1.10-4.55,P=0.023)as factors associated with T.gondii infection among pregnant women.The multivariable analysis,however,identified unimproved water sources as an independent risk factor(adjusted OR=2.4;95%CI=1.16-5.0,P=0.018)associated with T.gondii infection among pregnant women.Conclusions:Pregnant women in the rural communities of Taiz,yemen are at high risk of contracting T.gondii infection.Unimproved water sources(wells,water streams and water tanks)are significantly associated with T.gondii infection and should be considered in prevention and control strategies,especially among pregnant women.

关键词： Toxoplasma gondii Rural communities Pregnant women Waterborne transmission yemen

Prevalence and co-infections of schistosomiasis/hepatitis B and C viruses among school children in an endemic areas in Taiz,yemen

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Asian Pacific Journal of Tropical Medicine 2011年第5期4卷 404-408页

作者： Adam H Al-Shamiri Mohammed A Al-Taj Ameera S Ahmed Department of Microbiology Faculty of Applied ScienceTaiz UniversityYemen Department of Parasitology and Immunology Faculty of Applied ScienceTaiz UniversityYemen

Objective:To determine the disease prevalence and its relationship with hepatitis B and C viruses among school children in five endemic areas by schistosomiasis.Methods:During June 2007 and March 2009,1 484 school children aged between 5-16 years participated in the current study from 32 basic schools in five districts(Al-Dhabab,Hedran,Warazan,Al-Barh and Al-Shmaytin) in Taiz Governorate,Republic of yemen.Out of school children who participated in the study;1 406 stool samples,1 484 urine samples and 214 blood samples were collected and examined.Results:Schistosoma mansoni(S.mansoni) was found in all the studied areas except Al-Barh.However,Schistosoma haematobium(S.haematobium) was recorded only in Al-Shmaytin and Al-Barh.Both S.mansoni and S.haematobium were observed in Al-Shmaytin district.The overall prevalence was 20.76%for S.mansoni and 7.41%for S.haematobium. The prevalence rate of infection among males was higher than females,shwing no significant differences.Rate of light,moderate and heavy infections in the case of S.mansoni were 41.78%, 25.34%and 32.87%respectively.Whereas,for S.hematobium it was 50.90%for light infection and 49.09%for heavy infection.Regarding to the prevalence of viral hepatitis among infected school children with schistosomiasis,it could be noticed that hepatitis B virus was higher than the prevalence of hepatitis C virus.But,the presence of HBsAg and anti-HCV was not associated with Schistosoma infection.Conclusions:Schistosomiasis infection is an important public health problem in Taiz Governorate,Republic of yemen.There was a correlation between S. haematobium and hepatitis B,but no association between 5.mansoni infections and hepatitis B and C viruses.

关键词： Schistosomosis Intensity Hepatitis B and C virus School children yemen

Geochemistry of Ore-bearing Lamprophyre from the Cu-Ni Deposit in Dhi Samir,yemen

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Acta Geologica Sinica(English Edition) 2011年第1期85卷 200-210页

作者： ZUO Liyan PEI Rongfu SHUAI Kaiye YANG Fengqi ZHU Riwei ZHANG Liemeng Stone Resources Limited Beijing 100081 China Institute of Mineral Resources Chinese Academy of Geological Sciences Beijing 100037 China China University of Geosciences Beijing 100083 China

Magmatic Cu-Ni sulfide deposits are generally associated with mafic-ultramafic rocks and it has not been reported that lamprophyre is one of the surrounding rocks of Cu-Ni sulfide deposits.The Dhi Samir deposit in yemen,however,is a rare example of Cu-Ni deposits which are hosted in lamprophyre dikes.In this paper,comprehensive research is made on petrology,petrochemistry and isotope geochemistry for Cu-Ni-bearing rocks in the Dhi Samir area and the results show that dark rocks related to Cu-Ni orebodies are sodium-weak potassium and belong to calc-alkaline series lamprophyre,especially camptonite,characterized by enriched alkali,iron and titanium.In these rocks large-ion-lithophile elements are obviously concentrated,while high field strength elements slightly depleted,showing clear negative anomalies of Ta and Nb,and weak deficiency of Ti.TheΣREE is very high（225.67-290.05 ppm） and the REE partition curves are flat and right-inclined,featuring a LREE-enriched pattern with low negative Eu anomalies.Study of magmatic source areas indicates that the rocks have low（87Sr/86Sr） and highεNd（t）,and the magmas were probably derived from the enriched mantle I（EM-I） end-member.Based on the LA-ICPMS on zircon U-Pb isotope dating,the lamprophyre in the Dhi Samir mining area has an age of 602±2.6 Ma,indicating that the rock was formed in the late Proterozoic and in an intraplate setting due to magmatism of an extensional environment in the post-Pan-Africa orogeny.

关键词： lamprophyre geochemical characteristics Cu-Ni deposit in Dhi Samir yemen

The Impact of Computerized Health Information System on Medical &Administrative Decisions, Sana’a Hospitals, yemen (2017-2020)

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E-Health Telecommunication Systems and Networks 2022年第2期11卷 47-66页

作者： Ameen Mohammed Ali Hubaish Bakery Moussa Addeeb Abdulwahed Al-Serouri Suad Mughalles Yasser Ghaleb Health Office-Al-Mahwit Ministry of Public Health and Population Al-Mahweet Yemen Omdurman University Omdurman Sudan yemen Field Epidemiology Training Program Ministry of Public Health and Population Sanna’a Yemen

Background: Health information systems (HIS) play a major role in decision-making. The aim is to identify the components of computerized HIS and their relationship to administrative decisions at the main referral hospitals for Sana’a city. Method: This applied research is a descriptive, cross-sectional study in which the HIS of 7 hospitals affiliated with Sana’a city hospitals during “2017-2020”, was evaluated based on Self-administered questionnaires. Data were collected by using Self-administered questionnaires and analyzed in SPSS 16 by using descriptive statistics. Results: A total of 626 users (95.7%) had responded. 73%, 75%, 69%, 70%, 71% of users mentioned that resources were available, for physical, software, human, organizational, and decision computerized HIS, respectively. The study showed a strong relationship between computerized information systems with their physical, software, human and organizational components, and medical and administrative decisions. While the study showed the absence of a relationship between demographic factors and computerized information systems with their hardware, software, human and organizational components, medical and administrative decisions, except for gender with organizational components, age, qualification with hardware and software components, and years of experience with all study variables. Conclusion: The application of HIS at hospitals in decision-making has several challenges, including the lack of updating of hardware and software components Furthermore, the absence of specific, focusing on developing their technical staffs, and mobilizing financial resources to achieve implementation properly. Therefore, establishing the technical management with clear roles and tasks with multi-disciplinary, and increasing the support of the administrative leadership in the process of implementing HIS are recommended.

关键词： Health Information Systems Decision-Making Hospital yemen

The Impact of Total Quality Management on Health Services Improvement, Sana’a Hospitals, yemen (2017-2020)

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E-Health Telecommunication Systems and Networks 2022年第3期11卷 109-130页

作者： Khaled Abdoh Almuntaser Ali Bakery Moussa Addeeb Abdulwahed Al-Serouri Saud Mughalles Yasser Ghaleb Sana’a Health Office Ministry of Public Health and Population Sana’a Yemen Omdurman University-Sudan Omdurman Sudan yemen Field Epidemiology Training Program Ministry of Public Health and Population Sana’a Yemen

Background: Total quality management (TQM) plays a major role in quality health services improvement. The aims of the study are to identify the concepts of total quality management in health institutions to know the nature of the relationship between the application of TQM and improving the quality of health services in Sana’a Governorate. Method: This applied research is a descriptive cross-sectional study in which the TQM of 13 affiliated Sana’a Governorate hospitals during “2017-2020”, were evaluated based on self-administered questionnaires. Data were collected by questionnaires including demographical variables, TQM dimensions variables. Data were analyzed by using SPSS version 16. Results: A total of 281 users 98.6% had responded. The employee’s responses for sixth study dimensions were the top manager’s commitment (TMC) 80.46%, customers focusing CF 81.55%, continuous improvement (CI) 82.32%, training (T) 71.51%, and strategic planning of the quality (SPQ) 74.76%, health services quality improvement (HSQI) 74.25%. There is a strong relationship between TQM and HSQI. There is no relationship between demographic factors gender, profession, years of experience, except age with TMC, T, HSQI, qualification with the TMC, CI, T, HSQI and job with all study variables. Conclusion: The application of TQM at hospitals in quality of health services improvement has several challenges, lacking staff experience and lacking leadership support, weakness of the training, customers focusing, continuous improvement, and strategic planning of the quality. Therefore, benefiting from the experiences of leading hospitals in implementing total quality management programs by sending some cadres to these hospitals for training and gaining experience or by hosting experienced cadres to conduct training courses is recommended.

关键词： Total Quality Management Quality Health Service Improvement Hospital yemen

Knowledge, Attitude, and Practice toward Coronavirus (Covid-19) among Laboratory & Nursing Students of Hadhramout University, in Mukalla City, yemen

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Open Journal of Clinical Diagnostics 2023年第3期13卷 48-61页

作者： Muna Omar Alkatheri Medical Sciences Department of Nursing College Hadhramout University Mukalla Yemen

Background: As future healthcare providers, nursing students must have high-quality knowledge and be able to respond to rapid changes in any situation, such as the pandemic Covid-19. The condition of these students reflects the readiness of nursing students to face the increasing cases in the country. Since December 2019, coronavirus (Covid-19), a novel infectious disease that emerged, has spread worldwide, and the World Health Organization (WHO) has declared that the infection is a “pandemic” and no country or region can be considered safe. The World Health Organization declared the novel coronavirus a global health emergency (pandemic) on January 30, 2020. The novel coronavirus is a highly contagious disease, and the current outbreak has affected a large portion of the population around the world. Public health and social interventions play a critical role in reducing the number of infections and deaths until the vaccine is available to all. Objective: To determine the knowledge, attitude, and practice toward Coronavirus (Covid-19) among Laboratory & Nursing students of Hadhramout University, in Mukalla City, yemen. Methods: This was a descriptive cross-sectional. Stratified random sampling is used in sample selection to ensure that laboratory and nursing students total of 130 (70, 60) were included in the study. The sample was randomly selected from one hundred students, 50 laboratory students, and 50 nursing students studying at Hadhramout College. Time of study from October to December 2021. Results: The statistical analysis of data collected in this study showed that the awareness of coronavirus knowledge was high, as indicated by the percentage of correct answers. 78% of the nursing students obtained the highest percentage of knowledge about coronavirus, while more than 75% of the laboratory students, relied on social media as their main source of Covid-19 information. The College of Nursing students got the highest percentage of resource information about the Coronavirus 44%. Also we reported negative att

关键词： Covid-19 Knowledge Attitude Practice Muna Alkatheri Mukalla yemen

Prevalence of risk factors for noncommunicable diseases among rural women in yemen

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Family Medicine and Community Health 2018年第2期6卷 51-62页

作者： Gawad M.A.Alwabr Department of Biomedical Engineering Sana’a Community CollegeSana’aYemen

Objective:The objective of this study was to expand the evidence base on the prevalence of risk factors for the main noncommunicable diseases(such as diabetes mellitus,blood pressure,and obesity)among rural women in yemen.Methods:A descriptive cross-sectional study was conducted among 450 rural women in the age range from 18 to 60 years who presented in the targeted health centers of Sana’a and Al-Mah-weet governorates during the time of the study.Data were collected by a structured questionnaire developed as per World Health Organization STEPS guidelines.Body mass index,blood pressure,and biochemical measurements of fasting blood glucose were recorded.Results:Ninety-four percent of the respondents were physically inactive.Only 3.5% of re-spondents were smokers,while 66.3% were qat chewers.Forty-seven percent watched TV.Thirty-nine percent of respondents ate vegetables daily,while 19.5% consumed fruits daily.Among the respondents,31.3% were obese,15.0% were hypertensive,and 7.8% had diabetes mellitus.Age group,marital status,and education level were significantly associated with obesity,blood pres-sure,and diabetes mellitus.There were significant associations between obesity and blood pres-sure,as well as between blood pressure and diabetes mellitus.Conclusion:Frequent campaigns and educational programs are to be encouraged for the adoption of healthy lifestyle practices and health promotion.

关键词： Noncommunicable diseases risk factors prevalence yemen

Rehabilitation of historic Shibam and Zabid,yemen as an impulse for community and economy

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Built Heritage 2021年第3期5卷 110-120页

作者： Tom Leiermann ICOMOS Germany BerlinGermany.2 UNESCO DohaDohaQatar

Conditions in yemen involving armed confict and all kinds of structural challenges have also their impact on the fate of its built heritage.yemen’s three World Heritage Sites have their particular signifcance,all of them representing a region with its own cultural background:Sanaa in the highlands,Zabid in the coastal Tihama,and Shibam in the remote desert valley of Hadramaut.Unlike the Old City of Sanaa,the two smaller sites struggle with the limited resources of low-developed hinterland.Both preserve a unique urban culture:Zabid with its many elements of elaborate artistry and a vernacular architecture highly adapted to tropical conditions,and Shibam as a dense structure of unique mud-built tower houses.Preservation in a background of poverty,weak capacities of ofcial structures,and even war destruction risks can only succeed in connection with active engagement and commitment of the community,which however is heterogeneous and heritage preservation is not always their priority.Efcient strategies must therefore link local livelihood interests to preservation concerns.Market quarter and housing rehabilitation in both cities in last years had wide backing,supported income and resulted in visible upgrading of the very heart of these cities—showing locals recovery of historic structures has its potentials—even in the extreme conditions of yemen.

关键词： yemen Earthen architecture Heritage conservation Zabid Shibam Vernacular architecture