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Khalid M Yang WJ Kishwar N Rajput ZI Arijo AG 《Journal of Zhejiang University. Science. B》2006,7(6):459-466
This study is aimed at identifying and determining the percentage of occurrence frequency of cellulose decomposing soil fungi. The soil samples were inoculated into culture plates prepared in Sabouraud medium under sterilized conditions and incubated at 30 ℃ for 4 to 7 d. The identified fungal species were incubated in self-designed cellulose medium for testing their cellulolytic ability. Forty-two species, including2 nova species, representing sixteen genera showed growth and sporulation in the cellulose medium. Most of the isolated species were from genus Aspergillus and Penicillium. Aspergillus niger and Mucor hiemalis showed highest occurrence frequency （45% and 36% respectively）, as these species were collected from about 80% of soil samples. Being agar free and cheaper, the new fungal medium designed showed results equivalent to Sabouraud medium. 相似文献
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This study investigated counseling-orientation preferences of samples of counselor trainees in the United States and Australia using the Counseling-Orientation Scale. The authors compare the preferences in theoretical orientations and discuss the two major findings primarily in terms of the cultural characteristics of the two nations. 相似文献
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ALAM M.F. KHAN M.R. NURUZZAMAN M. PARVEZ S. SWARAZ A.M. ALAM I. AHSAN N. 《Journal of Zhejiang University. Science. B》2004,(4)
INTRODUCTIONAlthoughriceisanaturallyself-pollinatedcrop,strongheterosisisobservedintheirF1hybrids.HeterosisorhybridvigorismanifestedasimprovedperformanceforF1hybridsgeneratedbycrossingtwoinbredparents.Heterosiscanbedefinedquan-titativelyasanupwarddeviationofthemid-parent,basedonthemeanvaluesofthetwoparents(JohnsonandHutchinson,1993).Heterosismaybepositiveornegative.Dependinguponbreedingob-jectives,bothpositiveandnegativeheterosisareusefulforcropimprovement.Ingeneral,positiveheterosisisd… 相似文献
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INTRODUCTION In cancer patients, tumor immunity is generally impaired. However, tumor immunity may occur in-vivo as circulating tumor-specific antibodies, with cytotoxic T lymphocytes (CTLs) having been identi- fied in cancer patients (Disis et al., 1997; Albert et al., 1998) suggesting that effective anti-tumor responses may be elicited through immunotherapeutic strategies. In recent years, a number of clinical trials have proved the safety and feasibility of using human dendritic cell… 相似文献
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The rapid urbanization and industrialization involve an unsustainable use of natural systems,leading to various problems in cities.The urban hydrological system experiences fluctuating amount of surfac... 相似文献
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Recent instructional reforms in science education aim to change the way students engage in learning in the discipline, as they describe that students are to engage with disciplinary core ideas, crosscutting concepts, and the practices of science to make sense of phenomena (NRC, 2012). For such sensemaking to become a reality, there is a need to understand the ways in which students' thinking can be maintained throughout the trajectory of science lessons. Past research in this area tends to foreground either the curriculum or teachers' practices. We propose a more comprehensive view of science instruction, one that requires attention to teachers' practice, the instructional task, and students' engagement. In this study, by examining the implementation of the same lesson across three different classrooms, our analysis of classroom videos and artifacts of students' work revealed how the interaction of teachers' practices, students' intellectual engagement, and a cognitively demanding task together support rigorous instruction. Our analyses shed light on their interaction that shapes opportunities for students' thinking and sensemaking throughout the trajectory of a science lesson. The findings provide implications for ways to promote rigorous opportunities for students' learning in science classrooms. 相似文献
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INTRODUCTION Parasitic diseases is a global problem and con-sidered as a major obstacle in the health and productperformance of animals. These may be due toendo-parasites that live inside the body, orecto-parasites such as ticks, mites, flies, fleas, midges,etc., which attack the body surface. Amongecto-parasites, ticks are very important and harmfulblood sucking external parasites of mammals, birdsand reptiles throughout the world (Furman and Loo-mis, 1984). The medical and economic im… 相似文献
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RAJPUT Zahid Iqbal HU Song-hua XIAO Chen-wen ARIJO Abdullah G. 《Journal of Zhejiang University. Science. B》2007,8(3)
Vaccines require optimal adjuvants including immunopotentiator and delivery systems to offer long term protection from infectious diseases in animals and man. Initially it was believed that adjuvants are responsible for promoting strong and sustainable antibody responses. Now it has been shown that adjuvants influence the isotype and avidity of antibody and also affect the properties of cell-mediated immunity. Mostly oil emulsions, lipopolysaccharides, polymers, saponins, liposomes, cytokines,ISCOMs (immunostimulating complexes), Freund's complete adjuvant, Freund's incomplete adjuvant, alums, bacterial toxins etc.,are common adjuvants under investigation. Saponin based adjuvants have the ability to stimulate the cell mediated immune system as well as to enhance antibody production and have the advantage that only a low dose is needed for adjuvant activity. In the present study the importance of adjuvants, their role and the effect of saponin in immune system is reviewed. 相似文献