荷花的利用价值分析

荷花是一种重要的水生植物,其根、茎、花、果都有很高的价值。文章对荷花的生长习性、食用价值、药用价值、观赏价值及生态价值进行了系统分析,以期为荷花的综合利用与开发提供参考。     

基于HACCP的粮食质量安全网络监测平台研究

保证粮食质量安全对我国食品安全具有举足轻重的意义,为实现全程质量监控,确保粮食在各个环节的质量安全,需加强对粮食质量安全领域的监管力度,建立粮食质量安全保障体系,构建一个基于HACCP的粮食质量安全网络监测平台,实现粮食质量安全各个环节的透明化和信息化。     

四川桤木无性系采穗圃修枝与施肥试验初报

为提高四川桤木无性系采穗圃穗务产量,对其无性系进行了修枝与施肥试验,试验表明：在无性系定杆150cm高时,将其抽发的侧枝进行短截修剪,修剪强度以轻、中短截效果最佳,可显著提高无性系穗条产量,在无性系定杆120cm高时,施用氮肥可显著提高无性系穗条产量?     

基于反馈回归法的用电量预测模型研究

多元线性回归法是用电量预测中常用的一种方法,带反馈的多元线性回归法是一种改进的回归方法,具有更高的精度.本文在此基础上进行了多次反馈,即利用带多次反馈的多元线性回归法,结合SPSS软件进行统计分析,并以陕西省用电量为例探究分析多次反馈的多元线性回归法在用电量预测中的应用,从而得到更精准的用电量预测模型.最后以四川省的用电量数据对模型进行了验证,体现出了该模型的优越之处.     

Recombinant hFGF-10 adenovirus promotes proliferation of kerotinocytes

AIM:To construct the recombinant adenoviral vector containing human fibroblast growth factor 10 (hFGF-10) gene, and to study the effect of the recombinant adenovirus on the proliferation of kerotinocytes. METHODS:HFGF-10 gene was amplified by PCR and ligated with shuttle vector pAdTrack-CMV to get the recombinant plasmid pAdTrack-CMV-hFGF-10, which was linearized with PmeI and transferred into Escherichia coli BJ5183 containing the adenoviral bone plasmid pAdEasy-1 for homologous recombination to obtain the recombinant adenoviral plasmid pAdEasy-hFGF-10. The recombinant adenoviral plasmid was then transfected into HEK-293 cell line to package and amplify the recombinant adenovirus. The expression of hFGF-10 in HaCat cells infected with the recombinant adenovirus was detected by Western blotting. The influence of the recombinant adenovirus on the proliferation of kerotinocytes was checked by MTT. RESULTS:The recombinant adenovirus containing hFGF-10 gene was successfully constructed, which effectively infected HaCat cells. The result of Western blotting showed that a protein in culture media of the infected HaCat cells reacted with hFGF-10 antibody. The recombinant adenovirus stimulated the proliferation of kerotinocytes. CONCLUSION:HaCat cells infected with the recombinant adenovirus expresses and secrets hFGF-10 protein, which promotes the proliferation of HaCat cells.     

Significance of expression of extracellular matrix metalloproteinase inducer and endothelin converting enzymes in lymphoid metastasis and prognosis in non-small-cell lung carcinoma

AIM: To investigate the expression of extracellular matrix metalloproteinase inducer (EMMPRIN) and endothelin converting enzymes (ECE) in non-small-cell lung carcinoma (NSCLC), and their relationship with lymphoid metastasis and prognosis.METHODS: Expression of EMMPRIN and ECE in 77 cases of patients with NSCLC was detected immunohistochemically.The relationship of the expression of EMMPRIN and ECE with tumor size, histological type, differentiation, lymphoid metastasis, clinical stage, and prognosis were analyzed.RESULTS: The expressive rate of EMMPRIN and ECE was 66% and 45%, respectively.The expression of EMMPRIN and ECE was associated positively with lymphoid metastasis (both P<0.01, r=0.371 and 0.467, respectively), and inversely with survival time (P<0.01 and P<0.01).No relationship was found in the expression of EMMPRIN and ECE with tumor size, histological type, and differentiation (P>0.05).The expression of EMMPRIN was associated with the expression of HGF in NSCLC (P<0.05, r=0.243).CONCLUSION: The expression of EMMPRIN and ECE is associated with lymphoid metastasis and prognosis in NSCLC.Overexpression of EMMPRIN and ECE implies infavourable prognosis in NSCLC.     

沙漠增温效应下绿洲棉花热量生产潜力分析

在新疆干旱区,由于暖季沙漠增温效应的影响,与沙漠相邻绿洲区的热量资源相对优越,为植棉提供了有利条件。但随着时空变化,绿洲棉花热量生产潜力也呈现出相应的分异规律。本文以新疆北疆玛河流域石河子平原绿洲区为例,将绿洲与沙漠联系起来考虑,分析了距沙漠不同距离梯度的绿洲区棉花热量生产潜力。结果表明:石河子平原绿洲区内,距离沙漠最近区与最远区之间棉花热量生产潜力相差389Kg/hm2,绿洲与沙漠的距离平均每增加10Km,热量生产潜力下降43Kg/hm2。暖季沙漠增温效应对绿洲棉花的热量生产潜力影响明显,沙漠对相邻绿洲区的农业生产有着正面影响,起到了除太阳外第二个热量源的作用。     

卵巢组织玻璃化冷冻研究进展

卵巢组织玻璃化冷冻可替代直接冷冻卵母细胞或胚胎。玻璃化冷冻卵巢组织在辅助生殖上具有优越性。它无需控制供体的生殖周期 ,也无需取出卵泡。同样这一技术可用于保存濒危动物或受意外伤害的人或动物的卵母细胞 ;可为性成熟前失去生殖能力的动物或人提供生殖保险以及增加卵母细胞的来源 ;可用于建立生殖细胞 (卵母细胞 )的冷冻库。而传统的冷冻技术存在很多弊端。文章综述了玻璃化冷冻卵巢组织的研究背景和现状 ,并指出了其广阔的应用前景