Progress in roles of MNX1 antisense RNA 1 in malignant tumor

MNX1 antisense RNA 1 （MNX1-AS1） is a newly discovered long non-coding RNA （lncRNA）, which is highly dysregulated in various carcinomas and its expression level is closely related to the overall survival and prognosis of patients. MNX1-AS1 regulates the occurrence and development of carcinomas by endogenous competitive adsorption of miRNA, regulating cell cycle, inducing epithelial mesenchymal transformation and activating multiple signaling pathways. The in-depth study of the carcinogenesis of MNX1-AS1 is useful for the early diagnosis, targeted therapy and prognostic assessment of relevant carcinomas. This article reviews the roles of MNX1-AS1 in malignant tumor.     

晚熟蟠桃新品种‘瑞蟠4号'

‘瑞蟠４号’系以‘晚熟大蟠桃’＊‘扬州１２４蟠’育民的晚熟蟠桃新品种。该品种果实发育期约１３４ｄ,平均单果质量２２１ｇ。果实扁平形,白肉,硬溶质,味甜,粘核。     

苍溪梨果实褐斑病研究

近年来湖北襄阳一带苍溪梨果实上的褐斑病害,经研究证明,系磷、硼双缺引起。及时合理施硼,能迅速控制此病;保持土壤速效磷水平较高,可显著减轻受害程度     

银合欢木屑栽培香菇的配套技术

分析了银合欢木屑的营养成分,研制了最适宜的培养基,选用了高产优质的香菇菌株和高效益的栽培方式。发现银合欢木屑作为氮素添加物可替代50％麸皮,降低原料成本,使感染率降低11.8％,鲜菇产量增加5.1％;高产香菇菌株785比其他4个菌株至少可增产鲜菇14.8％;短袋栽培比菌筒或菌砖栽培增产,而且可以减少高温制种感染率高的危害;与红栲木屑栽培香菇相比,银合欢木屑增产鲜菇53.6％,生物学效率提高26.7％。该技术措施适合于在高温低海拔地区应用,在闽南地区增产鲜菇55.6％,生物效率提高25.8％。     

A reovirus disease in cultured mud crab, Scylla serrata, in southern China

A reovirus, designated mud crab reovirus (MCRV), associated with large economic losses was recently isolated from marine cultured mud crab, Scylla serrata, in southern China. The complete viral particle is 70 nm in diameter, icosahedral and non-enveloped. The virus infects connective tissue cells of the hepatopancreas, gills and intestine in mud crab and develops in the cytoplasm. Hundred per cent mortality was observed in mud crab experimentally infected by intramuscular injection, bath inoculation and oral inoculation, while cohabitation infection caused 80% mortality. The viral genome consists of 13 linear dsRNA segments, with an electrophoretic pattern 1/5/7. The results of this study suggest that the virus is highly pathogenic and can be transmitted enterically as well as via the body surface of mud crab. Although the genomic organization of this virus is different from that of the other crab reoviruses, CcRV-W2 and DpPV, all three of these reoviruses have similar electrophoresis patterns. Therefore, MCRV may be a new member of the DpPV and CcRV-W2 group.     

微胶囊双水相提取柑桔精油的工艺优化

为寻找一条适合工业化生产的低成本、低能耗、高效率的柑桔精油提取工艺路线,该文采用微胶囊与双水相联合萃取技术提取柑桔精油。结果表明：通过调整β-环糊精和硫酸钠的浓度比,可有效控制囊化萃取物中柑桔精油的质量。最终由正交试验设计确定出柑桔精油在萃取温度30℃、硫酸钠浓度15%、β-环糊精浓度40%、萃取时间30 min的条件下总收率高达96%以上。     

枸杞果实发育过程中营养成分的变化规律及其影响因素研究进展

枸杞作为重要的药用植物资源和药食同源的名贵中药材,是西北干旱地区的重要经济作物,近年来,随着人们对其需求量的增加和品质要求的提高,优质高产已成为枸杞产业关注的重点.枸杞果实中总糖、多糖、有机酸、甜菜碱、可溶性蛋白和色素等营养成分含量的高低是衡量枸杞品质的主要指标.对枸杞果实生长发育过程中这些营养成分的变化规律及其影响因素进行综述,以期为从分子水平研究各成分代谢的分子机理及其调控作用奠定基础,为枸杞的优质高产栽培提供参考.     

桃的电特性及新鲜度识别

为了解采后果品电特性变化机理,并探索基于电特性识别果品品质的方法,研究了桃采后电特性和生理特性的变化。结果表明,随着桃新鲜度下降,相对介电常数呈余弦规律变化,损耗角正切逐渐减小,呼吸高峰时相对介电常数最大。分析了电特性变化的原因,进而建立了采后桃电特性与生理特性之间的关系模型。以相对介电常数和损耗角正切为输入特征参数,应用BP神经网络技术识别桃的新鲜度等级,平均识别率为82％。     

薄壁封闭环磨削回弹的建模与数值研究

提出了卡环制造过程中磨削回弹的计算模型。根据卡环的精度和啮合力要求,设计了特殊制造工艺。考虑弯曲残余应力,对磨削工序进行力学分析,提出了磨削回弹弯矩、磨削回弹后搭叠长度和啮合力变化的计算模型;开发了卡环制造辅助工艺系统——Shuttle,对卡环磨削工序进行了模拟,并结合实验讨论了磨削前后曲率半径、啮合力和搭叠长度随余量的变化规律。研究表明：随着磨削余量的增加,试样磨削前的啮合力增加,而磨削回弹后的啮合力呈下降趋势;试样磨削前后的搭叠长度均呈下降趋势,并且试样截面惯性矩越大,磨削回弹后试样的搭叠长度下降速度越慢;在各工序阶段,试样的曲率半径有不同程度的增加。     

超临界CO2流体萃取杏仁油工艺研究

该研究以单因素试验和正交试验相结合的方法对苦杏仁脂肪油的超临界CO2萃取工艺进行了研究.确定了超临界CO2萃取杏仁油的最佳工艺为:萃取压力35 MPa、萃取温度50 ℃、CO2流量24 L/h、粒径60目、萃取时间2 h.各因素影响杏仁的得率的顺序为:粒径＞时间＞萃取压力＞CO2流量＞萃取温度.最佳工艺验证试验的杏仁油的得率为52.98%.本研究的结果为下一步综合、无毒、高效地开发利用苦杏仁奠定了基础.