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Research on the Adaptability of Rural Elderly People Moving to Urban Communities
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作者 Zhonglei Zhang Yu Jin 《Journal of Educational Theory and Management》 2017年第1期119-122,共4页
In recent years, under the background that the country actively promotes population urbanization, a large number of young people migrate to cities and towns through employment or schooling and take root in the urban c... In recent years, under the background that the country actively promotes population urbanization, a large number of young people migrate to cities and towns through employment or schooling and take root in the urban construction. However, the left-behind elderly people in rural areas are in a dilemma, and they will face many problems in their lives whether living in cities or staying behind, the quality of life is lowered generally. After going into the city, many elderly people in rural areas, due to their own physiological and psychological characteristics, do not adapt to living in urban areas, and the qualities of lives are not improved. By investigating the status quo of the elderly in rural areas migrating to urban areas, this paper analyses the reasons for and existing problems of migrating to urban areas and puts forward suggestions for improving community adaptability from the perspective of social work. 展开更多
关键词 The transmigrant ELDERLY COMMUNITY ADAPTATION SOCIAL work
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The Role of Neutrophils in the Interaction with <i>Leishmania</i>: Far beyond a Simple Trojan Horse? 被引量:1
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作者 João Carlos Araujo Carreira Alba Valéria Machado da Silva 《Open Journal of Animal Sciences》 2021年第3期399-421,共23页
<span style="font-family:Verdana;">Neutrophils are the most numerous leukocyte in mammals and normally they are the first phagocyte observed in recently damaged or infected tissues. They play a key rol... <span style="font-family:Verdana;">Neutrophils are the most numerous leukocyte in mammals and normally they are the first phagocyte observed in recently damaged or infected tissues. They play a key role </span><span style="font-family:Verdana;">in</span><span style="font-family:;" "=""><span><span style="font-family:Verdana;"> the innate immune responses to </span><i></i></span><i><i><span style="font-family:Verdana;">Leishmania</span></i><span></span></i><span style="font-family:Verdana;"> and several other microorganisms, nonetheless an exacerbated neutrophils activity can generate a harmful response to the host, therefore its turnover rate is very important to maintain the homeostasis and averts the host tissue damage. Both apoptosis followed by phagocytosis by mononuclear phagocytes (eferocytosis) and reverse transmigration have been considered the main processes for the clearance of neutrophils from injured or infected tissues. However, the interaction with </span><i></i></span><i><i><span style="font-family:Verdana;">Leishmania</span></i><span></span></i><span style="font-family:Verdana;"> and other microbes, as well as molecules produced by arthropod vectors such as sandflies saliva can modify the behavior of neutrophils, causing immediate lysis to prolong their life. In fact, as a result of a long course of coevolution, several microorganisms have developed skills to avoid neutrophil effector mechanisms and take advantage of neutrophil clearance pathways to promote their spread in the host’s body. </span><i><i><span style="font-family:Verdana;">Leishmania</span></i><span></span></i><span style="font-family:Verdana;">, </span><i><i><span style="font-family:Verdana;">Chlamydia pneumoniae</span></i><span></span></i><span style="font-family:Verdana;"> and </span><i><i><span style="font-family:Verdana;">Yersinia pestis</span></i><span></span></i><span style="font-family:Verdana;"> for example use the efferocytic Trojan horse process for their dissemination and immune protection, in a different way vaccinia Ankara virus and </span><i><i><span style="font-family:Verdana;">Toxoplasma gondii</span></i><span></span></i><span style="font-family:Verdana;"> exploit the neutrophil reverse transmigration for the same reason. Here we present an overview of some characteristics of neutrophils and their different destinations after interaction with several microorganisms, with an emphasis on </span><i><i><span style="font-family:Verdana;">Leishmania</span></i><span></span></i><span style="font-family:Verdana;"> species. It was also suggested the probable role of neutrophils reverse transmigration as another possible route for the spreading of </span><i><i><span style="font-family:Verdana;">Leishmania</span></i><span></span></i><span style="font-family:Verdana;"> in the visceral leishmaniasis.</span> 展开更多
关键词 NEUTROPHILS Leishmania Reverse Transmigration
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Transmigration and Agrarian Conflict: Agrarian Resources Conflict at Arongo, Southeast Celebes, Indonesia
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作者 Karsadi La Aso +2 位作者 Samiruddin Tarwan La Tamburu Laode Arupalaka 《Journal of Agricultural Science and Technology(A)》 2020年第5期265-275,共11页
Transmigration has negative impacts,namely,the resistance of the indigenous people against transmigrants and environmental damage.This study analyzes the resistance of indigenous people to defend their agricultural re... Transmigration has negative impacts,namely,the resistance of the indigenous people against transmigrants and environmental damage.This study analyzes the resistance of indigenous people to defend their agricultural resources of transmigration project.Results show that the transmigration projects have failed because of the social tensions between the indigenous people and transmigrants related to agricultural resources.At the same time,emerging oil palm plantation companies occupied agricultural resources that become the dispute’s object.Each party(group),either indigenous people,transmigrants,or oil plantation company claims that agrarian resource becomes the object of their properties. 展开更多
关键词 TRANSMIGRATION agrarian conflict agrarian resources southeast Celebes Indonesia
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Lead Accumulation in Tidal Swamps:Case Study at Transmigration Area of South Sumatra Indonesia after 40 Years Cultivation
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作者 Dedik Budianta Warsito Ardiansyah 《Journal of Environmental Science and Engineering(A)》 2022年第6期206-212,共7页
Lead(Pb)is a heavy metal that poses a major hazard to animals and humans when consumed.The content of this metal is significantly high in paddy soil due to the residual effect of phosphate fertilizer.Therefore,this st... Lead(Pb)is a heavy metal that poses a major hazard to animals and humans when consumed.The content of this metal is significantly high in paddy soil due to the residual effect of phosphate fertilizer.Therefore,this study aims to determine the Pb content in the tidal swamp that has been used for agriculture for 40 years.It was carried out from October 2021 to January 2022 on tidal soils representing land typology of A,B,C,and D distributed in the Transmigration area of Mulia Sari,Tanjung Lago District,Banyuasin Regency of South Sumatra,Indonesia.A detailed survey was used and soil samples were taken from up to 12 soil sampling points.The variables observed were soil Pb,pH,CEC(Cation Exchange Capacity),pyrite,and C-organic.The results showed that the Pb content in tidal soils obtained was varied,namely 22.52 mg/kg,14.84 mg/kg,16.84 mg/kg,and 16.68 mg/kg for A,B,C,and D type of land typologies,respectively.Based on these values,the Pb accumulation has exceeded the threshold,which is 12.75 mg/kg. 展开更多
关键词 Lead(Pb) tidal soil swamp area soil typology transmigration area
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Effect of human osteopontin on proliferation, transmigration and expression of MMP-2 and MMP-9 in osteosarcoma cells 被引量:20
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作者 刘思金 胡国法 +6 位作者 刘亚军 刘思国 高虹 张传生 魏影允 薛延 劳为德 《Chinese Medical Journal》 SCIE CAS CSCD 2004年第2期235-240,共6页
Background To explore the effect of human osteopontin (hOPN) on the proliferation, transmigration and expression of matrix metallproteinase-2 (MMP-2) and matrix metallproteinase-9 (MMP-9) in osteosarcoma (OS) cells in... Background To explore the effect of human osteopontin (hOPN) on the proliferation, transmigration and expression of matrix metallproteinase-2 (MMP-2) and matrix metallproteinase-9 (MMP-9) in osteosarcoma (OS) cells in vitro.Methods The prokaryotic-expression vector of hOPN was produced. hOPN was then subcloned into E coli BL21 (DE3) cells and purified with ProBondTM Columns. The proliferation, cell cycle and the expression of cyclin A in OS cells were investigated by using MTT assay, flow cytometry and Western blot respectively. The transmigration of OS cells was checked by using transwell cell culture chamber. The micro-pore-filter-membrane system was used to study the chemiotaxis of hOPN to OS cells. The levels of total protein were examined according to Coomassie Brilliant Blue manuals. The expression of MMP-2 and MMP-9 were evaluated by detecting the volume of degradation of gelatin on SDS-PAGE gel.Results The prokaryotic-expression vector of hOPN and purified hOPN protein were achieved hOPN promoted OS cells proliferation in a dose-dependent manner, and stimulated cyclin A expression in OS cells to accelerate cell division cycle. hOPN facilitated the trans-membrane migration of OS cells. hOPN also enhanced the secretion of MMP-2 and MMP-9 in OS cells.Conclusion hOPN could stimulate cyclin A expression in OS cells. hOPN has chemiotaxis to OS cells and increases their transmigration. hOPN enhances the secretion of MMP-2 and MMP-9 in OS cells. 展开更多
关键词 OSTEOPONTIN OSTEOSARCOMA PROLIFERATION TRANSMIGRATION matrix metallproteinase
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