排序方式： 共有27条查询结果，搜索用时 16 毫秒
1.
2.
Morphological and biochemical responses of Oryza sativa L. (cultivar MR219) to ion beam irradiation 总被引：1，自引：0，他引：1
Anna Pick Kiong Ling Ying Chian Ung Sobri Hussein Abdul Rahim Harun Atsushi Tanaka Hase Yoshihiro 《Journal of Zhejiang University. Science. B》2013,14(12):1132-1143
Objective
Heavy ion beam, which has emerged as a new mutagen in the mutation breeding of crops and ornamental plants, is expected to result in the induction of novel mutations. This study investigates the morphological and biochemical responses of Oryza sativa toward different doses of carbon ion beam irradiation.Methods
In this study, the dry seeds of O. sativa were irradiated at 0, 20, 40, 60, 80, 100, and 120 Gy, followed by in-vitro germination under controlled conditions. Morphological and biochemical studies were conducted to investigate the morphological and physiological responses of O. sativa towards ion beam irradiation.Results
The study demonstrated that low doses (10 Gy) of ion beam have a stimulating effect on the height, root length, and fresh weight of the plantlets but not on the number of leaves. Meanwhile, doses higher than 10 Gy caused reductions in all the morphological parameters studied as compared to the control samples. The highest total soluble protein content [(2.11±0.47) mg/g FW] was observed in plantlets irradiated at 20 Gy. All irradiated plantlets were found to have 0.85% to 58.32% higher specific activity of peroxidase as compared to the control samples. The present study also revealed that low doses of ion beam (10 and 20 Gy) had negligible effect on the total chlorophyll content of O. sativa plantlets while 40 Gy had a stimulating effect on the chlorophyll content. Plantlets irradiated between 40 to 120 Gy were shown to be 0.38% to 9.98% higher in total soluble nitrogen content which, however, was not significantly different from the control samples.Conclusions
Carbon ion beam irradiation administered at low to moderate doses of 10 to 40 Gy may induce O. sativa mutants with superior characteristics. 相似文献3.
Late in 1996, Kalgoorlie Collegeand the Western Australian School of Mines inWestern Australia were merged to form anexpanded campus of Curtin University, based inthe state capital city of Perth. This paperuses a frame analytical approach to examininghow differing and competing interpretations andcommitments affected how the merger was playedout. Three important frames, each of which hada major influence on the merger for periods oftime are identified: one that emphasisedregional social and economic development,another centred on education for industry and athird based on economic rationalism. Thisanalysis connects changes in the direction ofthe merger to shifts in the way the merger wasframed. 相似文献
4.
M. Ikhwan Maulana Haeruddin David Pick Htwe Htwe Thein 《Higher Education Quarterly》2020,74(3):257-272
The aim of this study is to explore women academic's identity work in the context of the Global South (Indonesia). This is done by examining how the interplay between macro‐level social, cultural and political influences and micro‐processes produce moments of compliance and resistance. To this end, the following research question is posed: What is the nature of identity work among women academics in higher education institutions of the Global South where there are shifting and conflicting social and cultural conditions? This study contributes by illuminating the ways in which women comply with or resist traditional and contemporary organisational and occupational structures that produce gender inequality. It also contributes to understanding how the interplay of power and resistance influences women's academic identity work in developing nations. 相似文献
5.
6.
7.
Shiau Mei WOON Yew Wei SENG Anna Pick Kiong LING Soi Moi CHYE Rhun Yian KOH 《Journal of Zhejiang University. Science. B》2014,15(3):295-302
Objective
This study examined the anti-adipogenic effects of extracts of Ficus deltoidea var. deltoidia and var. angustifolia, a natural slimming aid, on 3T3-L1 adipocytes.Methods
Methanol and water extracts of leaves of the F. deltoidea varieties were analyzed to determine their total flavonoid content (TFC) and total phenolic content (TPC), respectively. The study was initiated by determining the maximum non-toxic dose (MNTD) of the methanol and water extracts for 3T3-L1 preadipocytes. Possible anti-adipogenic effects were then examined by treating 2-d post confluent 3T3-L1 preadipocytes with either methanol extract or water extract at MNTD and half MNTD (1/2MNTD), after which the preadipocytces were induced to form mature adipocytes. Visualisation and quantification of lipid content in mature adipocytes were carried out through oil red O staining and measurement of optical density (OD) at 520 nm, respectively.Results
The TFCs of the methanol extracts were 1.36 and 1.97 g quercetin equivalents (QE)/100 g dry weight (DW), while the TPCs of the water extracts were 5.61 and 2.73 g gallic acid equivalents (GAE)/100 g DW for var. deltoidea and var. angustilofia, respectively. The MNTDs determined for methanol and water extracts were (300.0±28.3) and (225.0±21.2) μg/ml, respectively, for var. deltoidea, while much lower MNTDs [(60.0±2.0) μg/ml for methanol extracts and (8.0±1.0) μg/ml for water extracts] were recorded for var. angustifolia. Studies revealed that the methanol extracts of both varieties and the water extracts of var. angustifolia at either MNTD or 1/2MNTD significantly inhibited the maturation of preadipocytes. Conclusions: The inhibition of the formation of mature adipocytes indicated that leaf extracts of F. deltoidea could have potential anti-obesity effects. 相似文献8.
James B. Pick 《Archives and Museum Informatics》1990,4(2):2-7
The national survey, conducted for all art museums in the United States and Canada, resulted in 252 questionnaires, of which
166 were computer-user museums with acceptable questionnaires. The institutions using computers averaged 2.2 million in budget and had a median membership level of 860. Museums were divided in small, medium, and large budget categories by the budget ranges of2.2 million in budget
and had a median membership level of 860. Museums were divided in small, medium, and large budget categories by the budget
ranges of 0-210,000, 211-817,000, and211-817,000, and 818,000+. 相似文献
9.
The Re-Framing of Australian Higher Education 总被引：1，自引：0，他引：1
David Pick 《Higher Education Quarterly》2006,60(3):229-241
The aim of this paper is to analyse the changes in Australian higher education policy over the past two decades. Using frame analysis, two shifts in higher education policy are identified. The first is in the late 1980s where the view of higher education as having a broad social, economic and cultural role was changed to one that emphasised expansion, marketisation and competition. The second is currently taking place in which universities are becoming seen as business competitors in a global higher education market, and as such, privatisation and deregulation are centrally important. This paper demonstrates the usefulness of frame analysis as a way of examining the systemic effects of policy decisions in a way that draws together and uncovers how the various and complex forces of government policies and broader social and economic events combine to create the difficult terrain through which universities must now plot a course. 相似文献
10.