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Exposure of children to heavy metals from artisanal gold mining in Nigeria:evidences from bio-monitoring of hairs and nails

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Acta Geochimica 2020年第4期39卷 451-470页

作者： Adeniyi JohnPaul Adewumi Temitope Ayodeji Laniyan Tangfu Xiao Yizhang Liu Zengping Ning Department of Geological Sciences Achievers UniversityOwo.Ondo StateNigeria Department of Environmental Health Sciences College of MedicineUniversity of IbadanIbadanOyo StateNigeria Key Laboratory for Water Quality and Conservation of the Pearl River Delta Ministry of EducationGuangzhou UniversityGuangzhou 510006China School of Environmental Science and Engineering.Guangzhou University Guangzhou 510006China State Key Laboratory of Environmental Geochemistry Institute of GeochemistryChinese Academy of SciencesGuiyang 550081China

In recent times,there had been reported cases of Pb poisoning in Anka gold mining area,Northwest ***,this study was carried out to determine the extent of bioaccumulation of heavy metals in the hairs and nails of children in the *** samples(twenty nails and twenty hairs)samples were collected from ten boys and ten girls of ages 5–9 residing in the *** ascertain the sources of heavy metals in children,15 soils samples,15 groundwater samples,5 samples of mine tailings,and 5 plants samples were *** and nails of the subjects were collected using internationally acceptable *** samples were kept in uncontaminated ziplock bags prior to laboratory preparation and *** samples were cleaned using nonionic detergent(triton X-100)and deionized *** hairs and nails were digested with 10 mL of 6:1 mixture of nitric acid and perchloric *** soils,mine tailings,and plants were air-dried at room temperature,sieved,and chemically digested using the aqua regia *** concentrations of metals in all the samples were determined using highperformance liquid chromatography–inductively coupled plasma–mass *** analysis was employed to unravel potential sources of metals in the *** showed that heavy metals in children of the area are above results from similar studies and pathological ranges for heavy metals in hairs and ***,heavy metals in environmental media are above the recommended *** analysis showed that the metals are mainly from mining and other anthropogenic *** of correlation between heavy metals in hairs and nails with those in geological samples revealed that heavy metal that bioaccumulates in the children of this area are mostly from contaminated environmental *** is recommended that complete remediation and effective health education be carried out in the area.

关键词： Anka Bioaccumulation Children Heavy-metals hairs Nails

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Comparative Study on the Infrared Spectra of Straight Guard hairs of Leopard Cat and Golden Cat

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Agricultural Science & Technology 2013年第11期14卷 1683-1686页

作者：郭海涛南京森林警察学院刑事科学技术系江苏南京210046

[Objective] The paper was to compare the infrared spectra of straight guard hairs of leopard cat and golden cat. [Method] The straight guard hairs of leopard cat and golden cat were detected and analyzed by FTIR （Fourier Transform Infrared Spectroscopy）. [Result] There was significant interspecific difference in the infrared spectra and second derivative spectra for the middle part of guard hair. An evident M-shaped bimodal absorption peak appeared in golden cat at 648 and 654 cm-1, respectively, while did not appear in leopard cat. The second derivative spec-tra of golden cat at wave numbers from 709 to 763 cm -1 were mainly unimodal peaks with strong peak intensity, while that of leopard cat mainly was M-shaped bi-modal absorption peak with weak peak intensity. It indicated that there was obvious difference in the structure of protein side chain in guard hairs of these two animals. [Conclusion] The FTIR analysis showed great application foreground in the study of animal hairs for interspecific identification.

关键词： Leopard Cat Golden cat hairs FTIR (Fourier Transform Infrared Spec-troscopy)

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Ultrastructure of Bat (Pipistrellus kuhlii) Epidermis with Emphasis on Terminal Differentiation of Corneocytes

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Zoological Research 2006年第1期27卷 86-93页

作者： Lorenzo ALIBARDI 意大利博洛尼亚大学生物进化实验系

The ultrastrncture of the skin of air-adapted mammals （bats） is not known. The study at the electron microscope of the skin of the back and the flying membrane of Pipistrellus kuhlii showed that the thickness of the epidermis is very low （10- 12μm）, and that 1 - 2 flat spinosus cells are present beneath the stratum corneum which is formed by very thin corneoeytes that resemble those of avian apteric epidermis. The stratum granulosum is discontinuous and few small （less than 0.3μm large） keratohyalin granules are present. The epidermis is reduced to one flat basal layer in contact with the stratum corneum in many areas of the flying membrane. Transitional corneoeytes are almost absent suggesting that the process of eornification is very rapid. In the basement membrane numerous hemidesmosomes are present and form attachment points for the dense dermis underneath. Numerous collagen fibrils directly contact with the hemidesmosomes and the dense lamella of the basement membrane. Sparse elastic fibrils allow the stretching of the epidermis during flight and the rapid folding of the epidermis after flying without damaging the epidermis. Like in avian epidermis, the production of lipids is high in bat keratinocytes, and multilamellar bodies discharge lipids extra- and intra-cellularly. This may compensate the lack of a thick fat layer in the dermis of the flying membrane as lipids may help in thermical insulation against the cooling air currents flowing on the bat skin during flight. Fur hairs are very thin （4 - 7 μm）, and they have an elaborated cuticle made of pointed expansions similar in texture with that of the cortex. Cuticle ceils form hook-like grasping points that allow to keep hairs stuck together. In this way the pelage remains compact in order to maintain body temperature.

关键词： Bat Skin Epidermis hairs Comification Ultrastructure

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Morphogenesis of Chinese Water Chestnut Pistil and Pollen Tube during Germination

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Asian Agricultural Research 2016年第5期8卷 74-76,79页

作者： Kunpeng OU Fanglian HE Yan WANG Wen JIANG Meiping GAO Zhiqiang BI Lijuan CHEN Weiqing DONG Jie GUI Biotechnology Research Institute Guangxi Academy of Agricultural Sciences

With the forms of pistil stigma of " Guiti 2" Chinese water chestnut cultivar during the pollination as the object of observation,we reveal the pollination process of Chinese water chestnut from the microscopic point of view,to provide reference for Chinese water chestnut crossbreeding. The results show that the Chinese water chestnut pistil has 2- 4 stigmas which present white filament and vascular bundle forms,and the vessels on epidermis are thick with long translucent branched hairs; after pollination,pollen grains are tightly bound on branched hairs,and after identification,the pollen tube can penetrate branched hairs,continue to grow,and transfer the genetic material in pollen to vascular bundle.

关键词： Chinese water chestnut Stigma Branched hairs Pollination

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建社十年　几点体会

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现代出版 1995年第3期 10-11页

作者：吴枫桐北京体育大学出版社

建社十年几点体会吴枫桐北京体育大学出版社成立１０年来，坚持党的出版方针，坚持为教学、训练和科研服务的办社宗旨，艰苦创业，拼搏工作，取得了较好的社会效益和经济效益。在实践中，我们深切地体会到：一、领导要以身作则，花大力... 详细信息

建社十年几点体会吴枫桐北京体育大学出版社成立１０年来，坚持党的出版方针，坚持为教学、训练和科研服务的办社宗旨，艰苦创业，拼搏工作，取得了较好的社会效益和经济效益。在实践中，我们深切地体会到：一、领导要以身作则，花大力气抓好思想工作要管好全社的人员和工...

关键词： Young’ s modulus non- deternimacy stadia hairs limit error

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