应用化学指标表征红大品种烟叶的品质特征

[目的]探讨一种全面、完善地应用烟叶化学指标表征其品质特征的方法.[方法]以红大、K326、云87等5种具有代表性的烤烟品种的C3F烟叶为材料,对烤烟的评吸结果、常规指标、致香成分、有机酸等指标进行比较分析.[结果]红大烟叶清甜韵好,香气量充足;在常规指标中表现为烟碱、总糖、还原糖、pH高于其他品种;在致香成分中表现为直链脂肪酸及酯高于其他品种烟叶;在有机酸中表现为异戊酸、2-甲基丁酸、十六酸、苯甲酸含量高于其他品种烟叶.[结论]研究可为应用化学指标表征红大品种烟叶的品质特征提供理论及试验依据.     

植物CCCH型锌指蛋白研究进展

锌指蛋白是具有典型锌指结构特征的超蛋白家族,几乎参与了生物体生长发育的各个阶段,其中CCCH型锌指蛋白包含一个或多个由三个半胱氨酸和一个组氨酸组成的基序。本文综述了植物CCCH锌指蛋白的结构、作用方式、功能等方面的研究进展,并对其应用前景进行了展望。     

龟鳖类动物热休克蛋白研究进展

介绍了热休克蛋白(HSP)的分类、特点及生物学功能,总结了近年来龟鳖类动物HSP在抗缺氧机制、性别决定机制、组织表达特异性及免疫调节方面的研究进展,并讨论了中华鳖HSP研究的意义和前景。     

图书馆网站的模糊评价模型

网站是高校图书馆的重要组成部分。通过构建对高校图书馆网站的评价指标体系,在此基础上应用模糊综合评价法运用指标体系对高校图书馆网站进行综合评价,旨在为图书馆网站评价方面的研究作出一些有意义的借鉴。     

丹江口水库不同支流浮游藻类和附石藻类的比较研究

为研究河流生境差异对微型藻类生物多样性的影响,揭示指示藻类在河流生态系统健康评价中的地位,于2010年8月对丹江口水库的典型支流汉江库神定河和丹江库淇河进行了浮游藻和附石藻比较研究。结果显示,在神定河鉴定到浮游藻类7门98属193种(含变种),附石藻类3门36属61种(含变种);淇河浮游藻类为7门82属165种,附石藻类为4门10属48种(含变种)。从采集的样品中共鉴定出污染指示种15属21种(含变种),其中淇河贫营养型指示种(7种)多于神定河(6种),而其富营养指示种均低于神定河。从生物学角度判定淇河水质优于神定河。     

湖州市农业气象服务及灾害预警系统开发

目前湖州市农业产业正由传统粗放型向现代设施农业精细化方向调整,为及时提供精准化、专业化的农业气象服务,优选湖州地区粮食、蔬菜、瓜果、茶叶、桑蚕、林业、水产、畜牧等产业,收集整理近20种具有湖州地区特色的农产品气象灾害指标,形成决策指标库,结合天气预报数据库、各类实况数据库及当前养殖动物、作物生长发育情况,形成各种农气灾害预警信息及各种服务材料,通过预警短信网发送到各类服务对象,取得较好的服务效果。     

生物制剂对约书亚树幼苗成活及生理生化影响的综合评价

采用保水剂（处理Ⅰ）、生根粉(处理Ⅱ)、矮壮素(处理Ⅲ)与多效唑(处理Ⅳ) 4种生物制剂,研究了不同生物制剂对2年生沙漠植物约书亚树幼苗的成活、生长及生理生化指标的影响,并对其影响效益作出综合评价。结果表明:处理Ⅰ及处理Ⅱ均能显著提高约书亚树幼苗的成活率,分别高于对照10.78%及5.43%,处理Ⅲ及处理Ⅳ较对照的成活率分别降低了15.78%及11.25%。处理Ⅰ显著促进了幼苗生长并提高了约书亚树幼苗的光合生理指标、渗透调节物质含量、POD酶及CAT酶活性。处理Ⅱ对幼苗株型无显著影响,抗氧化酶活性及脯氨酸含量均显著高于对照。处理Ⅲ使幼苗株高显著低于其他处理,并主要影响幼苗的游离脯氨酸含量及抗氧化酶活性指标。处理Ⅳ促进幼苗地径增粗和植株矮化,并影响植物的光合生理及SOD酶活性指标。利用主成分分析得出,约书亚树幼苗的株型及光合生理因子在综合评价中权重最大,为 68.11%;D值的排序为:处理Ⅰ处理Ⅳ处理Ⅱ对照处理Ⅲ,说明保水剂为最佳生物制剂,显著提高了植物的成活率及生理生化指标,并能显著促进幼苗生长;其次为生根粉,通过影响渗透调节物质和抗氧化酶活性指标促使成活率显著提高;多效唑虽然对植物的影响效益较大,但其浓度可能不适宜植物成活,对其施用浓度需要进一步研究。      

Effects of cyclic tensile strain on expression of p38 MAPK and phospho-p38 MAPK in osteoarthritis chondrocytes

AIM: To observe the effect of cyclic tensile strain (CTS) on the expression of p38 MAPK and phospho-p38 MAPK in rabbit osteoarthritis (OA) chondrocytes in vitro. METHODS: The animal model of OA was induced by anterior cruciate ligament transection in New Zealand white rabbits. The animals in all groups were evaluated 10 weeks later. The rabbits in OA group were randomly divided into 3 groups, low CTS (0.5 Hz, sin10%, 6 h/d) group, high CTS (1.0 Hz, sin10%, 6 h/d) group and control group. Both CTS groups were stimulated by a Flexercell-4000 tension system. The expression of p38 MAPK and phospho-p38 MAPK of the chondrocytes was analyzed by RT-PCR and Western blotting at the time points of 24 h, 1 week and 2 weeks. RESULTS: The knee joints of the rabbits in OA group had obvious degeneration of articular cartilage. The expression of p38 MAPK in normal group was significantly lower than that in control group (P<0.01), and the difference between low CTS group and high CTS group 1 week after stimulation (P<0.05) was observed. Meanwhile, significant difference was found between low CTS group and control group 2 weeks after CTS treatment (P<0.01). The expression of phospho-p38 MAPK was decreased at different time points in low CTS group. CONCLUSION: Different cyclic tensile strains lead to different effects on the expression of p38 MAPK and phospho-p38 MAPK in the chondrocytes. p38 MAPK signaling pathway plays an important role in the development of osteoarthritis in chondrocytes.     

《新编拉汉英植物名称》

本书收集具有经济价值和学术价值或通俗常见的种子植物、蕨类植物、苔藓植物、藻类植物、真菌、地衣名称55800条。每种植物名称有拉、汉、英三种文字对照,按拉丁文字母顺序排列。书后附有英文俗名和汉名     

Molecular genetics of the adrenocortical axis and breeding for robustness

The concept of robustness refers to the combination of a high production potential and a low sensitivity to environmental perturbations. The importance of robustness-related traits in breeding objectives is progressively increasing toward the production of animals with a high production level in a wide range of climatic conditions and production systems, together with a high level of animal welfare. Current strategies to increase robustness include selection for "functional traits," such as skeletal and cardiovascular integrity, disease resistance, and mortality at various stages. It is also possible to use global evaluation of sensitivity to the environment (eg reaction norm analysis or canalization), but these techniques are difficult to implement in practice. The glucocorticoid hormones released by the adrenal cortex exert a wide range of effects on metabolism, the cardiovascular system, inflammatory processes, and brain function, for example. Protein catabolism toward energy production and storage (lipids and glycogen) supports their pivotal role in stress responses aiming at the adaptation and survival of individuals under strong environmental pressure. Large individual variations have been described in adrenocortical axis activity, with important physiopathological consequences. In terms of animal production, higher cortisol levels have negative effects on growth rate and feed efficiency and increase the fat:lean ratio of carcasses. On the contrary, cortisol has positive effects on functional traits and adaptation. Intense selection for lean tissue growth and more generally high protein output during the past decades has concomitantly reduced cortisol production, which may be responsible for the negative effects of selection on functional traits. In this paper, we review experimental evidence suggesting that the balance between production and functional traits was modified in favor of improved robustness by selecting animals with higher adrenocortical axis activity, as well as the molecular genetic tools that can be used to fine-tune this objective.