改善实木复合地板尺寸稳定性的措施

研究了两种涂料配方的不同配比对木质复合地板尺寸稳定性的影响，结果表明：以醇酸清漆为主的涂料对地板产品进行后期处理，在产品尺寸稳定性和成本方面均优于其它涂料，合理选取涂料组分和配比，不仅能提高产品的尺寸稳定性，而且提高产品外观的美观度。     

中密度纤维板工厂设计中的循环经济——减量化（Reduce）原则应用

文章叙述了在中密度纤维板产品工厂设计中尝试应用循环经济理论中的减量化原则，从提高原材料综合利用率，降低能源动力消耗量，清洁生产过程三方面入手，取得了较好的效果。     

Effect of L-Arg on plasma content of endothelin and expression of c-fos mRNA in the left ventricle of rats with renovascular hypertensive hypertrophy

AIM:To study the effect of L-Arg on plasma content of endothelin (ET) and the expression of proto-oncogene c-fos mRNA in the left ventricle of rats with renovascular hypertensive hypertrophy. METHODS: The level of c-fos mRNA were measured by in situ hybridization. The ET in plasma were measured by radioimmunoassay. RESULTS:After eight weeks of treatment with L-Arg, the expression of c-fos decreased markedly (P＜0.01). The ET content in plasma also decreased significantly by L-Arg(P＜0.01).CONCLUSION: Plasma ET content and the expression of c-fos in the left ventricle of rats with renovascular hypertensive hypertrophy could be decreased by L-Arg administration.     

The Effect of Caffeic Acid on Zearalenone-induced Ovarian Granulosa Cell Apoptosis in Mice

Ovarian granulosa cells provide a special microenvironment for follicle formation and maturation through interaction with oocytes and their own secretion. A variety of harmful stimuli can cause granulosa cell apoptosis and metabolic disorders, reduce the quality of oocytes and have a negative impact on embryo formation. Zearalenone (ZEA) is a common cause of ovarian granulosa cells injury in the livestock industry, which is produced by mycotoxins, and lack of effective treatment drug. Therefore, in the current study zearalenone was used to induce ovarian granulosa cell injury and to explore the protective effect of caffeic acid on zearalenone-induced ovarian granulosa cell apoptosis in mice. Mouse ovarian granulosa cells were isolated by mechanical method, and indirect immunofluorescence was used to identify the isolated cells. MTT assay was used to determine the effect of caffeic acid on the activity of normal mouse ovarian granulosa cells.After granulosa cells were co-treated with caffeic acid (200, 100 and 50 μg·mL^-1) and ZEA for 24 hours, and control and ZEA group were set up at the same time, cell morphology and adherence were observed under a microscope. MTT was also used to detect cell viability. Caspase-3 mRNA expression level was detected by qRT-PCR. Cleaved-caspase-3 and cleaved-PARP protein expre-ssion levels were determined by Western blot. The results showed that positive FSHR staining appeared in cell cytoplasm of the test group, which confirmed that the isolated cells were mouse ovarian granulosa cells. The cell viability was above 90% which showed that caffeic acid had no toxic effect on granulosa cells. Compared with control group, ZEA group had smaller cell size, poor adherence, increased cell gap, and significant reduction in cell viability (P<0.001). Furthermore, the relative expression of caspase-3 mRNA, and cleaved-caspase-3 and cleaved-PARP protein level were significantly increased (P<0.001) compared with the control group. After caffeic acid treatment, cell gap was reduced, adherence was tight, cell viability was significantly increased (P<0.001). Caffeic acid significantly reduced zearalenone-induced increase in caspase-3 mRNA, and cleaved-caspase-3 and cleaved-PARP protein expression level (P<0.001). This study indicated that caffeic acid can restore granulosa cell viability by inhibiting ZEA-induced apoptosis.     

“香两优98049”的选育与应用

用“香125S”与“98049”进行杂交,育成早稻新组合“香两优98049”。该组合产量高、抗性强。简要介绍了该组合的栽培和制种技术要点。     

浑善达克沙地动态变化影响因素分析

通过景观的角度分析该区的动态变化影响因素可知,气温升高和降水量减少是荒 漠化景观发展的基础和背景条件,超载过牧是荒漠化景观发展的主要原因,至于其他因素如滥 砍、滥伐、滥垦、滥挖药材、搂发菜、樵采等起了推波助澜的作用。     

浙江富阳金属冶炼厂周围水田土壤-水稻系统中As、Se含量特征

本文研究了浙江富阳金属冶炼厂周围水田土壤-水稻系统中As、Se含量特征。所采土壤样品中,As含量高于土壤环境质量一、二和三级标准的分别占总数的21.15%、9.62%和7.69%。该金属冶炼厂周围88.46%的土壤属于富Se土壤。足Se土壤占总样的5.77%,过量Se土壤占3.85%,高Se土壤占5.77%。水田土壤可能受与金属冶炼有关的点源污染影响。糙米的As、Se含量高于全国糙米As、Se背景值,可食部分As、Se浓度均未超过我国规定的水稻卫生标准。     

2个多年生花生品种低温胁迫下活性氧代谢特性研究

不同低温胁迫下对平托花生Arachis pintoi与蔓花生A.duranensis2个多年生花生品种进行的叶片活性氧代谢与质膜特性进行研究。结果表明,A.duranensis品种无论在超氧化物岐化酶(SOD)、过氧化物酶(POD)还是过氧化氢酶(CAT)相对活性在低温胁迫下均不低于或显著高于A.pintoi,表现出相对较高的清除自由基能力;其质膜相对透性(RPP)增加幅度明显小于A.pintoi;丙二醛(MDA)相对含量增加率则表现出相反趋势;表明A.duranensis具有更强的抗寒性。