当前农村建设用地整理问题探讨

随着建设用地问题控制的强化和集约节约用地意识的不断深化,农村建设用地整理逐渐得到了各级政府、部门以及广大群众的重视和支持,并取得了一些成绩,但是,仍然在组织和人员、规划方案编制以及后期监管等方面存在问题。文章立足于对当前农村建设用地整理现状问题的归纳思考,探索性地提出解决对策。     

Efficacy of a Fructus mume Extract Combination with Stable Chlorine in Preventing Bacterial Contamination in Frozen Mackerel (Scomber japonicus) Fillets

ABSTRACT

A combination composed of Fructus mume extract and stable chlorine dioxide was investigated for its antibacterial activity, mechanism of action, and its application against Escherichia coli and Staphylococcus aureus in mackerel (Scomber japonicus) fillets. The minimum inhibitory concentration (MIC) and minimum bactericidal concentration (MBC) values against E. coli and S. aureus ranged from 0.9–1.2 and 1.3–1.6 mg/mL for F. mume extract and 0.004–0.006 and 0.007–0.010 mg/mL for stable chlorine dioxide, respectively. We observed a mechanism of action against E. coli that involved a pore-formation role that led to cell membrane damage. In the case of S. aureus, the mechanism of action is believed to be mediated by the combination’s activity as a metabolite disrupting agent. Here, the amount of bacteria was greatly reduced in mackerel fillets treated with the combination. Moreover, the flavor and texture properties of fillets were not significantly affected by this treatment (p < 0.05). These findings suggested that the combination has promise in being used as an additive to a broader class of foodstuffs.     

推进青岛市经济作物机械化的思考

青岛市在基本实现粮食作物生产机械化的基础上,把工作重点转向了经济作物生产机械化。总结了青岛市经济作物生产机械化现状,分析了制约经济作物生产机械化的主要因素,提出了促进经济作物机械化水平提升的对策与建议。      

北京市科普惠农兴村计划效果评价

在分析北京市科普惠农兴村计划效果评价现状的基础上,运用层次分析法,建立效果评价指标体系并赋予权重。利用该评价指标体系,分析2013年度北京市科普惠农兴村计划的统计数据,得出北京市各郊区县实施该计划的效果。      

碎石、浮石混合骨料级配优化试验研究

采用ZBSX92A型震击式标准振筛,对碎石、浮石骨料进行筛分,筛完后,按粒径段26.5mm～19mm、19mm～16mm、16mm～9.5mm、9.5mm～4.75mm将骨料分类存放.以fuller理论为基础,计算出各个粒径段骨料的质量比,通过与文献[7]中分形理论试验得出的抗压强度的较好的级配结果对比,得出按fuller级配理论得出的质量比同样能使的试验中的浮石、碎石骨料达到合理的搭配,骨料级配较好.     

Neuroprotective effect of wortmannin on epileptic rats by inhibiting autophagy

AIM: To investigate the role of autophagy in hippocampus injury induced by seizures and to observe the neuroprotective effects of autophagy inhibitor wortmannin(WM) on epileptic rats.METHODS: The Wistar rats were randomly divided into control group, model groups at 2 h, 8 h, 16 h, 24 h or 72 h after seizure induction by pilocarpine, and WM pretreatment group. The methods of HE and Nissl staining were used to evaluate the hippocampus injury. The expression of microtubule-associated protein 1 light chain 3(LC3) was detected by Western blotting. The ratio of LC3II to LC3I was calculated and used to represent the activity of autophagy. RESULTS: The significant increase in the ratio of LC3II to LC3I began at 2 h, peaked at 24 h, and maintained at high level at least to 72 h after seizure induction. Obvious neural injury and neuron depletion were observed in hippocampus CA1 area at 24 h after seizure induction. The number of surviving neurons at 24 h was sharply decreased in rats with seizures(75.50±5.92) as compared to the controls(110.67±18.56, P＜0.01). WM significantly decreased the neuron depletion induced by seizures(100.88±18.73, P＜0.05). Moreover, WM significantly decreased the ratio of LC3II to LC3I in rats with seizures at 24 h(P＜0.05). CONCLUSION: Autophagy was activated in hippocampus injury induced by seizures. WM reduces the transformation of LC3II to LC3I to inhibit the autophagy activated by seizures. WM has neuroprotective effect on epileptic rats by increasing the surviving neurons in hippocampus CA1 area.     

Molecular characterization of melanin-concentrating hormone (MCH) in <Emphasis Type="Italic">Schizothorax prenanti</Emphasis>: cloning,tissue distribution and role in food intake regulation

Melanin-concentrating hormone (MCH) is a crucial neuropeptide involved in various biological functions in both mammals and fish. In this study, the full-length MCH cDNA was obtained from Schizothorax prenanti by rapid amplification of cDNA ends polymerase chain reaction. The full-length MCH cDNA contained 589 nucleotides including an open reading frame of 375 nucleotides encoding 256 amino acids. MCH mRNA was highly expressed in the brain by real-time quantitative PCR analysis. Within the brain, expression of MCH mRNA was preponderantly detected in the hypothalamus. In addition, the MCH mRNA expression in the S. prenanti hypothalamus of fed group was significantly decreased compared with the fasted group at 1 and 3 h post-feeding, respectively. Furthermore, the MCH gene expression presented significant increase in the hypothalamus of fasted group compared with the fed group during long-term fasting. After re-feeding, there was a dramatic decrease in MCH mRNA expression in the hypothalamus of S. prenanti. The results indicate that the expression of MCH is affected by feeding status. Taken together, our results suggest that MCH may be involved in food intake regulation in S. prenanti.     

Improvements of Fiber Yield and Fiber Fineness by Expressing the iaaM Gene in Cotton Seed Coat

Cotton,the most important natural fiber crop in the world,is a mainstay in China's economy.However,for over two decades,cotton yields both in China and U.S.have been at a plateau.One reason for this plateau is the limitation of current cotton germplasm.Cotton fibers are single cells resulting from elongated cells of the ovule epidermis.IAA regulates both plant growth and differentiation,and it has important roles in cotton fiber development.     

优质杂交中籼稻新组合天优1120的选育与应用

天优1120(天丰A/盐恢1120)系江苏沿海地区农科所育成的三系杂交中籼稻新组合,具有米质优,高产稳产、增产潜力大,熟期适中、适应性广,抗病性强等特点,2008年通过江苏省品种审定.介绍了该组合的选育经过、产量表现、特征特性及高产栽培和制种技术要点.