一种复合黑米、黑芝麻的黑小豆沙货架期预测研究     

张雪路  阮长青  章采东  刘文静  孙记涛  李芳 《黑龙江八一农垦大学学报》2017,29(3)

为探明复合黑米、黑芝麻的黑小豆沙在不同贮藏温度条件下的贮藏特性和货架期。采用不同温度下进行贮藏,定期测定其菌落总数,建立不同温度下生长动力学模型,同时利用10℃和20℃的实际货架期对建立的模型进行验证,得到4℃~25℃条件下货架期预测模型。结果表明:4~25℃条件下货架期预测模型为SL=λ-[(5.016 4-N0)/(μ_(max)×2.718)]×{ln[ln(4-N_0)/(5.016 4-N_0)]-1},结合常温下储藏感官分析和大肠杆菌测定得到25℃保质期为60 d左右。该模型可以为豆沙类产品货架期预测提供参考。  相似文献   

行业特色型高校创建一流本科教学的探索     

张薇  于伟  阮怀宁  郝晶晶  鞠平 《高等农业教育》2017,(3)

本科教学是高校发展的基石,创建行业特色型高校一流本科教学,培育行业一流人才,对攸关国家战略需求的重点行业发展具有无可替代的支撑作用。立足于行业特色型高校"服务行业,彰显特色,引领发展"的长远目标,结合"特色+目标""特色+内涵""特色+举措"三大方面,研究分析创建一流本科教学的努力方向、建设内涵,并以河海大学为例提出特色举措,共同探寻行业特色型高校如何创建一流本科教学。  相似文献   

一种改进的尖孢镰刀菌的实时荧光定量PCR检测方法   总被引：1，自引：0，他引：1  

黄怀冬  肖姬玲  张屹  阮万辉  魏林  梁志怀 《植物保护》2017,43(4):129-133

为实现荧光定量PCR对土壤病原真菌数量更为高效、灵敏的检测,本研究将液体培养的孢子悬浮液和长年耕作的水稻土制作成孢子浓度为4×10~1~4×10~6 spore/g的带菌土,采用MoBio PowerSoil@DNA Isolation Kit提取模拟带菌土壤总DNA,引入常规PCR预扩增包含qPCR目标序列的1 446bp片段,以预PCR产物为模板进行qPCR,构建荧光定量PCR标准曲线。研究结果表明:以试剂盒提取的带菌土壤总DNA为模板绘制的qPCR标准曲线相关系数r为0.985,检测下限为4×10~3 spore/g土;引入预PCR后,qPCR标准曲线相关系数r为0.974,检测下限为4×10~2 spore/g土,较未引入时提高了10倍,结合不同土壤病原真菌的特异性引物,该检测方法可为土壤病原真菌的有效定量检测提供技术支撑。  相似文献   

Evaluation of resistance of current wheat cultivars and breeding lines to stripe rust from three Gorges reservoir area   总被引：1，自引：0，他引：1  

Yuheng Yang  Fajing Chen  Dejun Han  Renwu Ruan  Boqun Li  Yang Yu  Chaowei Bi 《Journal of General Plant Pathology》2017,83(5):283-290

Nearly 100,000 ha in the Three Gorges Reservoir Area (TGRA) are in wheat production and the area is a junction where wheat stripe rust overwinters and causes epidemics the next spring; thus the area plays a pivotal role in wheat stripe rust epidemics in China. To better understand wheat resistance levels and the application of Yr genes in this area, 116 wheat cultivars (lines) were collected from the TGRA to investigate stripe rust resistance during the 2014–2016 cropping seasons. Seedling resistance evaluation results indicated that only nine accessions (7.8%) were immune or nearly immune to three predominant races of CYR32, CYR33 and PST-V26. In the field evaluation, 51 accessions (43.9%) showed adult-plant resistance, whereas 56 accessions (48.3%) were susceptible. The application of resistant sources focused on ineffective Yr9 (26.7%) and Yr17 (18.9%), and gradual ineffective Yr26 (34.5%), while effective Yr5, Yr10 and Yr15 were absent. Among them, 21 accessions (18.1%) were combined with two resistance genes. Both low resistance and more concentrated use of Yr genes indicated that this region faces a major risk for a wheat stripe rust epidemic. To improve the wheat resistance level in the TGRA, it is important to discover new all-stage resistance resources and diversify resistance resources for breeding.  相似文献   

柑橘链格孢褐斑病病菌对异菌脲和嘧菌环胺敏感性评价     

韩国兴  符雨诗  阮若昕  李红叶 《中国植保导刊》2017,(7):11-15

柑橘链格孢褐斑病(Alternaria brown spot,ABS)是新近在我国局部地区新发现的病害。本研究以来自我国各褐斑病发生区的54个代表菌株为群体,应用刃天青(RZ)显色法测定病菌群体对异菌脲和嘧菌环胺的敏感性。结果表明,该病菌种群孢子萌发对2种药剂均表现敏感,尚未发现抗药性菌株,平均EC50分别为0.616 6μg/m L和0.030 4μg/m L。对于异菌脲,广西和浙江菌株较不敏感;对于嘧菌环胺,所有菌株均非常敏感,且敏感性与菌株的地理来源无关。  相似文献   

Metal accumulation in House Sparrow (Passer domesticus) from Thohoyandou,Limpopo province,South Africa     

Nathan J Baker  Simone Dahms  Ruan Gerber  John Maina  Richard Greenfield 《African Zoology》2017,52(1):43-53

Studies on metal pollution (cadmium, cobalt, chromium, copper, manganese and nickel) in South African terrestrial environments are severely lacking. Due to being relatively unaffected by industrialisation, the Thohoyandou region may provide data on natural levels of metals for use as baseline data. The House Sparrow (Passer domesticus) was chosen as a bio-indicator of metal pollution due to its abundance, non-migratory lifestyle and close association with humans. The aims were to determine the viability of using feathers as a non-lethal bio-indicator tissue compared with muscle. Plume feathers, flight feathers and muscle tissue were analysed using ICP-OES techniques. Analyses of tissue metal concentrations identified the following trend: plume feather > flight feather > muscle tissue. Within the Thohoyandou region, Magondi, which was affected by anthropogenic activities at the time of sampling, had significantly higher concentrations (p ≤ 0.05) for each of the metals, indicating potential metal contamination from various sources. Alternatively, Makonde had the lowest metal concentrations and may be an important reference site for future comparative studies. The results showed that the House Sparrow can be used as a bio-indicator organism in South African terrestrial environments. The plume feathers indicate that they are a good non-lethal tissue for determining metal pollution levels on a temporal scale, indicating recent metal exposure.  相似文献   

从战略高度推进竹业发展的几点思考     

刘恒贵  费本华  范少辉  阮班全  刘广路  王燕 《世界竹藤通讯》2017,15(5):52

木本竹在保证木材安全、食品安全、生态安全和繁荣生态文明中具有重要的地位,尤其在促进地方经济发展、改善民生、绿色发展等方面发挥着重要作用,竹产业发展迎来了良好的机遇。文中以咸宁毛竹资源的开发利用现状为背景,在充分分析调研资料的基础上,剖析了竹业发展面临着劳动力资源贫乏、传统竹制品应用空间被压缩、加工技术滞后、综合利用率低、扶持力度不大等问题。在综合评估竹子及其产业地位和价值的基础上,针对存在问题提出了通过加大政策支持、完善产业链条、突破技术瓶颈等手段来推动竹业健康快速和可持续发展的建议。  相似文献   

不同地理居群山桐子的果实含油率与脂肪酸含量   总被引：6，自引：0，他引：6  

祝志勇  王强  阮晓  李兆慧  薛军  江浩  卢翔 《林业科学》2010,46(5)

随着煤炭、石油等化石能源价格的不断上涨,加快可再生能源,尤其是生物质能源的发展,以推进能源替代,被认为是解决全球能源危机的最理想途径之一(唐红英,2008)。目前,世界各国,尤其是发达国家,都致力于开发高效、无污染的生物质能源利用技术,以保障能源安全,实现CO2减排,促进经济、社会的可持续发展(Holdren,1991)。根据专家预  相似文献   

Dietary amylose and amylopectin ratio and resistant starch content affects plasma glucose,lactic acid,hormone levels and protein synthesis in splanchnic tissues     

J. Deng  X. Wu  S. Bin  T.‐J. Li  R. Huang  Z. Liu  Y. Liu  Z. Ruan  Z. Deng  Y. Hou  Y.‐L. Yin 《Journal of animal physiology and animal nutrition》2010,94(2):220-226

Experiments were conducted to determine the effects of feeding different starch sources on piglets. Four diets were formulated with maize, brown rice, sticky rice and Hi‐Maize 1043 as starch sources, with resistant starch (RS) contents of 2.3%, 0.9%, 0.0%, 20.6%, and amylose and amylopectin ratio of 0.23%, 0.21%, 0.18%, 0.06% respectively. Fifty‐six pigs weaned at 28 days of age were randomly assigned to one of the four diets. In Exp. 1, six piglets in each group were fitted with an indwelling jugular catheter. After 25 days of feeding trial, venous blood samples were obtained at time zero and every 1 h for 4 h. In Exp. 2, the remaining piglets were used to determine the effects of different starch sources on the fractional synthesis rate (FSR). The results indicated that feeding the Hi‐Maize 1043 diet decreased (p < 0.05) plasma contents of glucose, insulin, lactic acid and T₃, while sticky rice increased plasma contents of glucose and insulin. The insulin contents in piglets fed the sticky rice diet was 69.2 μIU/ml at 1 h post‐feeding which was highest among the starch diets. The FSR in the pancreas, spleen, duodenum, jejunum, ileum and colon in the corn group were much higher (p < 0.05) than that in the sticky rice group. These results suggest that RS is potentially beneficial for improving insulin sensitivity in young pigs and that the ratio of amylose and amylopectin have significantly effects on the FSR in splanchnic tissues in weaned piglets. Another finding of this study indicated maize with a ratio of amylose and amylopectin of 0.23 has the best starch sources for pig production.  相似文献   

不同形态及不同粗纤维水平日粮对1～50日龄鸵鸟生长性能的影响     

王金利  石芳萍  任战军  阮鹏  刘恭峰 《饲料工业》2010,31(20)

比较不同形态及不同粗纤维水平日粮对1～50日龄鸵鸟生产性能的影响,为鸵鸟雏鸟的全价颗粒饲粮配制提供试验论证及合理的粗纤维水平数据。选取1日龄健康的鸵鸟160只,随机分为4个处理(1个对照组,3个试验组),每处理4个重复,每重复10只雏鸟,对照组日粮形态为精料(粗纤维为5%)+苜蓿青草,3个试验组的日粮形态为全价颗粒饲料(其粗纤维水平分别为4%、5%、6%)。饲喂精料+苜蓿青草形态日粮的雏鸟体增重和饲料效率显著高于饲喂全价颗粒饲料的各处理(P0.05),并且没有雏鸟死亡;3个不同粗纤维水平的颗粒料的采食量和体增重的差异都不显著(P0.05),其中粗纤维水平为5%的颗粒饲料饲喂的效果相对较好,但该组的死亡率最高,为15.0%。以精料+苜蓿青草形态的日粮饲喂1～50日龄鸵鸟的效果好于饲喂全价颗粒饲料的效果;全价颗粒饲料粗纤维水平过低会引起鸵鸟雏鸟的粪干便秘并造成死亡,本试验表明,1～50日龄鸵鸟饲料中的粗纤维水平不宜低于6%。  相似文献