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Hori Ghaneialvar Leila Soltani Hamid Reza Rahmani Abbas Sahebghadam Lotfi Masoud Soleimani 《Indian journal of clinical biochemistry : IJCB》2018,33(1):46-52
Mesenchymal stem cells are multipotent cells capable of replicating as undifferentiated cells, and have the potential of differentiating into mesenchymal tissue lineages such as osteocytes, adipocytes and chondrocytes. Such lineages can then be used in cell therapy. The aim of present study was to characterize bone marrow derived mesenchymal stem cells in four different species, including: sheep, goat, human and mouse. Human bone-marrow mesenchymal stem cells were purchased, those of sheep and goat were isolated from fetal bone marrow, and those of mouse were collected by washing bone cavity of femur and tibia with DMEM/F12. Using flow-cytometry, they were characterized by CD surface antigens. Furthermore, cells of third passage were examined for their osteogenic and adipogenic differentiation potential by oil red and alizarin red staining respectively. According to the results, CD markers studied in the four groups of mesenchymal stem cells showed a different expression. Goat and sheep expressed CD44 and CD166, and weakly expressed CD34, CD45, CD105 and CD90. Similarly, human and mouse mesenchymal cells expressed CD44, CD166, CD105 and CD90 whereas the expression of CD34 and CD45 was negative. In conclusion, although all mesenchymal stem cells display plastic adherence and tri-lineage differentiation, not all express the same panel of surface antigens described for human mesenchymal stem cells. Additional panel of CD markers are necessary to characterize regenerative potential and possible application of these stem cells in regenerative medicine and implantology. 相似文献
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Amit Kumar Mani Tiwari Abbas Ali Mahdi Sanjay Mishra 《Indian journal of clinical biochemistry : IJCB》2018,33(1):31-37
Iron deficiency anemia is one of the causes that lead to significant mortality and morbidity among pregnant women and fetus. The present study was undertaken to explore oral iron supplementation can modify the metal contents in pregnant anemic women. Iron and folic acid supplementations was given to 500 anemic women (mild = 200, moderate = 200, and severe = 100) and 100 age matched non-anemic controls daily for 100 days. Blood index values and plasma trace minerals were estimated as per standard protocols. Haemoglobin and ferritin levels were found significantly increased (p < 0.001) in anemic and control subjects after treatment. Moreover, the serum transferring receptor levels and total iron binding capacity were found significantly decreased in all treated groups. Iron (Fe), zinc (Zn) and copper (Cu) levels were found increased (p < 0.01) after oral iron supplementation groups. Moreover, selenium (Se) manganese (Mn) and were found to be decreased in all treated groups. Data provides the conclusion that iron and folic acid supplementation recovered the essential trace minerals, except manganese, which may lead to various complications including peroxidation of vital body molecules resulting in increased risk for pregnant women as well as fetus. 相似文献
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In this article we examine how students’ accounts of the discipline of sociology change over the course of their undergraduate degrees. Based on a phenomenographic analysis of 86 interviews with 32 sociology and criminology students over the course of their undergraduate degrees, we constituted five different ways of accounting for sociology. These ranged from describing sociology as a form of personal development focused on developing the students’ opinion to describing sociology as a partial way of studying the relations between people and society. The majority of students expressed more inclusive accounts of sociology over the course of their degrees. However, some students’ accounts suggested they had become disengaged with sociology. We argue that the differences in the ways that students were disengaged were not captured by our phenomenographic categories. In conclusion, we argue that our analysis illustrates the crucial role that students’ relations to knowledge play in understanding the transformative nature of higher education. 相似文献
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Masoud Kabiri Mahmood Ghazi-Tabatabaei Abbas Bazargan Mohsen Shokoohi-Yekta Kamal Kharrazi 《教育实用测度》2017,30(1):27-38
Numerous diagnostic studies have been conducted on large-scale assessments to illustrate the students’ mastery profile in the areas of math and reading; however, for science a limited number of investigations are reported. This study investigated Iranian eighth graders’ competency mastery of science and examined the utility of the General Diagnostic Model (GDM) to produce diagnostic information using TIMSS 2011 data. Eight diagnostic attributes were extracted, using documentary analysis of the major large-scale assessment frameworks, including basic science knowledge, using models, reasoning, using science, representing data, explaining of phenomena, predicting, and scientific inquiry. These attributes were then assigned to each item in order to construct the Q matrix, through focus group discussions, survey of head science teachers, think-aloud verbal protocol, and analysis of written answers. Results show the utility of GDM to generate rich diagnostic information for a national large-scale assessment. Moreover, the findings indicated that students performed relatively well in using science, but performed weakly in reasoning, explaining of phenomena, and scientific inquiry, which all required complex skills and higher-order thinking abilities. 相似文献
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Annette?SherryEmail author R.?W.?Burniske Candido?Manuel?Varela?de?Fretas José Diaz de Rabago?S.?J. Abbas?Johari Clarence?Chu Fran?ois?Marchessou 《TechTrends》2003,47(6):19-25
Conclusion Although many questions remain unanswered, these early translations of the AECT Code of Ethics will be available at the AECT
Web site to ensure that access to the principles is offered in languages other than English. As they become available, more
translations will be added to the English, Farsi, French, Mandarin Chinese, Portuguese, and Spanish versions. The translations
will be saved as PDF files to retain the unique characters of each language.
Additional translators with expertise in both educational technology and the targeted languages will be identified. Exploration
of ways to encourage debate regarding the viability of the translations within diverse cultures continues. The ultimate hope
is that collaboration among members of the professional ethics committee of AECT, the translators, and interested educators
will result in the development of a Code of Ethics that “speaks” across cultures and establishes a meaningful guide to professional
conduct around the world.
Authors’ Note: This article expands on earlier work published in the (2002) Proceedings of the Annual Meeting of the Association
for Educational Communications and Technology, edited by M, Simonson. 相似文献
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