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国外火山地质 1987年第3期 1-8页

作者： william p.leeman David W.phelps 周伟栋

对黄石(Yellew stone)火山区8个高硅流纹质熔岩中分离出的透长大石—玻璃对,测定了主要元素和微量元素的含量。根据这些数据得到的大多数元素的透长石/玻璃的分配系数,在累积分析误差范围内保持一致。这种一致性反映了主要元素组成及推... 详细信息

对黄石(Yellew stone)火山区8个高硅流纹质熔岩中分离出的透长大石—玻璃对,测定了主要元素和微量元素的含量。根据这些数据得到的大多数元素的透长石/玻璃的分配系数,在累积分析误差范围内保持一致。这种一致性反映了主要元素组成及推测的分析样品的物理条件的一致性,可以认为,这些样品可代表大多数黄石流纹岩。其中特别值得注意的是,相对于文章中采用的其它

关键词：透长石分配系数熔体钾长石电器构件岩流酸性岩流纹岩痕量元素微量元素

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新生代火山岩的同位素地球化学揭示了位于美国西部地幔的不均匀性

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世界地质 1992年第4期11卷 27-33页

作者： Martin A.Menzies william p.leeman Chris Hawkesworth 朱连兴

美国西部新生代火山岩的同位素地球化学揭示了地幔源区显著的不均匀性。盆地及火山岩山脉已导出与洋中脊和夏威夷群岛玄武岩相类似的岩浆源。在塞拉后里昂区喷出的岩浆是形成干显著富化并含石榴石非均质地幔。在蛇河平原和黄石公园的双... 详细信息

美国西部新生代火山岩的同位素地球化学揭示了地幔源区显著的不均匀性。盆地及火山岩山脉已导出与洋中脊和夏威夷群岛玄武岩相类似的岩浆源。在塞拉后里昂区喷出的岩浆是形成干显著富化并含石榴石非均质地幔。在蛇河平原和黄石公园的双峰式流纹岩——玄武岩地区,还保留有地幔源区原始同位素特征的橄榄石拉斑玄武岩。

关键词：火山岩同位素地球化学地幔

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Cardiometabolic phenotype and Arterial Stiffness in HIV-positive Black African patients

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Open Journal of preventive Medicine 2014年第4期4卷 182-192页

作者： Daniel Lemogoum william Ngatchou philippe Van De Borne Valérie Ndobo Marc leeman Euloge Yagnigni Emiline Tiogou Elisabeth Nga Charles Kouanfack Luc Van Bortel Jean-paul Degaute Michel p. Hermans Department of Cardiology Central Hospital Yaounde Cameroon Department of Endocrinology and Nutrition Cliniques Universitaires St-Luc Brussels Belgium Heymans Institute of pharmacology Ghent Uni-versity Ghent Belgium Hypertension Clinic Erasme University Hospital Brussels Belgium

Objective: To test the hypothesis that Human Immunodeficiency Virus (HIV) infection in Black patients is associated with increased cardiometabolic risk factors that may increase aortic stiffness assessed by pulse wave velocity (pWV). Methods: We matched 96 Cameroonian Controls to 238 (Un) treated HIV-positive patients [HIV] for age. In each participant, aortic pWV (ComplioR), blood pressures (Bp), lipid profile and fasting blood glucose (FpG) were measured. Results: Waist circumference was lower in HIV than in Controls (both p g·dl-1), and of diabetes (FpG > 125 mg·dl-1) were higher in HIV than in the Controls (50% vs 27%, and 23% vs 1%, respectively;both p pared to the Control (p = 0.02). Fasting triglycerides (TG) and the atherogenic dyslipidemia ratio [log(TG)/HDL-C] were higher in HIV than in the Controls (both p pertension prevalence was high but comparable in the two groups (48% vs 44% respectively, p > 0.05). HIV patients exhibited a twice-higher prevalence of MetS (AHA/NHLBI score 33/5) than that of the Controls (41% vs 21%;p 0.01). Similarly, severity of MetS phenotype was higher in HIV as compared to the Controls (2.14% vs 1.59%;p pWV adjusted for age, mean Bp and gender was faster in HIV in comparison to the controls (7.33 m/s vs 6.86 m/s, respectively;p = 0.036). Conclusions: HIV infection is associated with higher prevalence of MetS and its phenotype in Black African patients that may induce increased aortic stiffness.

关键词： Metabolic Syndrome pulse Wave Velocity Arterial Stiffness Human Immunodeficiency Virus Infection Black Cameroonian patients

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prevalence and Correlates of Glucose Homeostasis Abnormalities in the Far-North Region Cameroon

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Open Journal of preventive Medicine 2018年第1期8卷 6-20页

作者： Daniel Lemogoum william Ngatchou Elysée Claude Bika Lele pierre Amta philippe Van de Borne Marc leeman philippe Donnen Nicolas Nicolas preumont Jean paul Degaute Michel Michel Hermans Faculty of Medicine and pharmaceutical Sciences University of Douala Douala Cameroon ULB-Erasme Hospital Free Brussels University Brussels Belgium Cameroon Heart Foundation Douala Cameroon Medical Research Centre Institute of Medical Research and Medicinal Plants Studies Yaoundé Cameroon School of public Health Free Brussels University Brussels Belgium Endocrinology and Nutrition Unit Cliniques Universitaires St-Luc Université Catholique de Louvain Brussels Belgium

Background: Evidence indicates a growing burden of glucose homeostasis abnormalities (namely type 2 diabetes mellitus (T2DM) and prediabetes) in Cameroun. The aim of this study was to assess the prevalence and correlates of glucose homeostasis abnormalities (GHA) in the Far-North region of Cameroon, where these variables have not been explored so far. Methods: We included in this population-based cross-sectional survey 461 participants living urban area (Maroua) and 428 dwellers living in rural area (Tokombere) aged at least 18 years, using a multistage-cluster sampling frame. In all participants, we recorded sociodemographic, medical history, clinical data and fasting blood (capillary) glucose (FBG). Diabetes was considered for FBG ≥ 126 mg/dL or being on glucose-lowering medications, and impaired fasting glycemia (IFG) for FBG 100 - 125 mg/dL. Results: The overall age-standardized prevalence of GHA, IFG and diabetes was 33.6%, 21.7% and 11.9%, respectively. Those data were similar between urban and rural areas. Determinants of GHA were age, overweight/obesity, abdominal obesity and hypertension. IFG was only related to abdominal obesity, while diabetes was related to age, family history of diabetes, overweight/obesity, abdominal obesity and hypertension. Conclusion: Glucose homeostasis abnormalities are alarmingly high in Far North Cameroon. Efforts are needed to promote healthier lifestyles and initiate diabetes-screening campaigns in Cameroon.

关键词： Glucose Homeostasis Abnormalities Diabetes prediabetes Far-North Region Cameroon Urban Rural

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