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Molecular Simulation of Ion Transport at the Water/Vapor Interface

Open Journal of Physical Chemistry 2012年第3期2卷 147-155页

作者： Jalal Dweik Mahmoud Srour Khaled Karaky Marwan Kobeissi Wissam Joumaa Khalil abou-saleh Département de Physique et Chimie Faculté des Sciences Université Libanaise Nabatieh Liban Institut Européen des Membranes CNRS UMR 5635 Université Montpellier II ENSCM Montpellier France Laboratoire de Physiotoxcicité Environnementale EDST017 Faculté des Sciences Université Libanaise Nabatieh Liban

Molecular dynamics was used to quantify the role of the size, charge and polarisability of F–, Cl–, Br–, I– and Na+ ions in their distribution in the water/vapour interface system. Our results show that the larger polarizable anions I– and Br– is attracted to the surface which is traced back to surface-modified ion hydration, while the F– was repelled from the interface and the Cl– occupied the total volume of the water slab. Moreover, by artificially increasing the ions charge, anions were localized to the center of the water slab. These results demonstrate that the effect of polarizability cannot be neglected in the transport mechanism.

关键词： Molecular Dynamics Ions Interface Interaction potentials Solvation Polarization

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Insulin-Like Growth Factor-1 and Osteocalcin Are Correlated with Markers of Osteoporosis in Postmenopausal Women with Type-2 Diabetes

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Open Journal of Endocrine and Metabolic Diseases 2013年第5期3卷 245-251页

作者： Maher A. Kamel Madiha H. Helmy Anna N. abou Rayah Nevine mohannad Huda M. N. Hania Department of Biochemistry Medical Research Institute Alexandria University Alexandria Egypt Department of Internal Medicine Faculty of Medicine Alexandria University Alexandria Egypt

Objective: The study was conducted to evaluate the relation between insulin-like growth factor-1 and osteocalcin and markers of bone modulation (osteoprotegerin;OPG, receptor activator nuclear kappa B;RANK and RANK ligand;RANKL) in postmenopausal Type 2 diabetic women with and without osteoporosis. Methods: The study was conducted on 90 female divided into three groups (30 each). Group I included healthy postmenopausal women as a control, Group II included diabetic postmenopausal women without osteoporosis Group III included diabetic postmenopausal women with osteoporosis. Fasting blood samples were obtained for the determination of blood glucose, HbA1c, total and ionized calcium, OPG, RANK and RANKL. Also the levels of IGF-1 and osteocalcin were assessed. Results: In postmenopausal Type 2 diabetic women, the osteoporosis resulted in derangement in OPG/sRANKL system. The serum level of OPG was elevated while sRANKL declines in osteoporotic postmenopausal Type 2 diabetic women. IGF-1 level decreased in diabetic postmenopausal women but those women with osteoporosis showed a great decline by about 60%. IGF-1 level in osteoporotic diabetic postmenopausal women was correlated with BMD and most bone turnover markers (OPG, sRANKL, OPG/sRANKL). Osteocalcin declined significantly only in those women with osteoporosis not without osteoporosis. Conclusions: The circulating levels of OPG and sRANKL were not useful markers for bone status in postmenopausal women while the circulating levels of IGF-1 and osteocalcin might give useful information about bone status in postmenopausal diabetic women.

关键词： Osteoporosis Type 2 Diabetes Postmenopause IGF-1 Osetocalcin OPG RANK

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Anatomical and Adaptation Features of <i>Pistacia atlantica</i>Desf. to Adverse Climate Conditions in Algeria

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American Journal of Plant Sciences 2017年第2期8卷 137-153页

作者： Mohamed Amara Mohammed Bouazza mohannad G. Al-Saghir Bouchaib Belhadj University Centre Department of Natural Sciences and Life Ain Temouchent Algeria Laboratory of Ecology and Management of Natural Ecosystems Abou Bakr Belkaid University Tlemcen Algeria Laboratory of Ecology and Management of Natural Ecosystems Department of Ecology and Environment Abou Bakr Belkaid University Tlemcen Algeria Department of Environmental and Plant Biology Ohio University Zanesville Ohio USA

This work was conducted to assess the anatomical features of Pistacia atlantica Desf. under Mediterranean semi-arid climate conditions. In this study, phytoecological approach was used at different observation scales including the large ecological scale. 11 samples of P. atlantica species were randomly selected in order to study the anatomy of leaves and branches. The results show that leaves have palisade parenchyma occupying almost the entire mesophyll, measuring 100 to 170 μm. While in branches, the only pith occupies 38% followed by the xylem (24%), relative to the rest of the tissue (epidermis, periderm, collenchyma, pericyclic fiber, secretory duct and phloem). The current results suggest that P. atlantica species has xeromorphic anatomical characters, giving it great ecological plasticity in an arid environment. Moreover, this study shows that the human activities are causing local extinction of this rare species in Algeria.

关键词： Pistacia atlantica Xeromorphic Anatomy Adaptation Arid/Semi-Arid Algeria

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Sex Hormones Changes in Blood and Their Effect on Fecundity of African Catfish(Clarias gariepinus Burchell,1822)after Being Injected with Different Doses of Human Chorionic Gonadotropin(HCG)Hormone

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Journal of Zoological Research 2020年第4期2卷 19-30页

作者： Hamed H.E.saleh Ahmed I.Semaida Sayed R.S.Zidan Ramadan M.abou-Zied Sobhy M.Allam Aquaculture Division National Institute of Oceanography and Fisheries(NIOF)El-FayoumEgypt Animal Production Department Faculty of AgricultureFayoum UniversityEgypt

This study was conducted to investigate the effect of different doses injection of human chorionic gonadotropin(HCG)hormone on fecundity and serum sex hormones(FSH,LH,estrogen(E2),progesterone(P4),testosterone(T))of African catfish(Clarias gariepinus).African catfish spawners were intermuscularly injected with different doses of HCG(500,1500,3000,6000 IU/kg female),and group is not injected as a control;males were injected at half the female *** results showed that,fish group injected by 6000 IU HCG/kg female had the highest gonadsomatic index,absolute fecundity and relative fecundity,while,the lowest value of absolute fecundity and relative fecundity were recorded with 500 IU HCG/kg *** group injected with the highest amount of HCG(6000 IU/kg female)recorded the lowest value from egg diameter,while the highest egg diameter was observed in 500 IU HCG/kg *** females,the group injected with 6000 IU HCG/kg female reflected the lowest level of FSH and the highest level of LH and the highest level of P4 compared to other *** of T recorded the highest level with 1500 IU HCG/kg *** control group reflected the highest level of FSH and E2,while the control group reflected the lowest level of T and P4 *** males,serum FSH,LH,P4 and E2 in male groups injected with HCG were relatively higher than those recorded in the control *** highest level of T was recorded in treatment injected with the highest dose of HCG and decreased in other treatments until recorded the lowest level of T in the control *** was observed,HCG hormone has successfully and accelerate induced spawning in African catfish(Clarias gariepinus)and increased in reproductive performance with the increase in HCG dosage and as compared to group not injected.

关键词： African catfish HCG hormone Gonadsomatic index Fecundity FSH LH Estrogen Progesterone and testosterone

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