聚合条件对羧甲基纤维素、玉米淀粉双母体高吸水性树脂性能的影响     

李蜀眉  田维平  塔娜  温国华  刘润芝  李佳  目仁更 《内蒙古农业大学学报(自然科学版)》2008,29(2)

采用自由基聚合法,以过硫酸铵为引发剂,N,N'-亚甲基双丙烯酰胺为交联剂,羧甲基纤维素及玉米淀粉与丙烯酸进行自由基接枝共聚合成吸水剂.并详细考察了中和丙烯酸时,KOH的用量及中和度对高吸水性树脂吸收能力的影响.实验表明:丙烯酸的中和度为95%时,高吸水性树脂对纯水、自来水和生理盐水的吸收率有最高值,分别是592g/g、300g/g和99g/g.当氢氧化钾的中和百分比为1%时,高吸水性树脂对纯水、自来水和生理盐水有最高吸收率,分别为630g/g、340g/g和95g/g.  相似文献   

Intradermal challenge of Icelandic horses in Norway and Iceland with extracts of Culicoides spp   总被引：1，自引：0，他引：1  

H J Larsen  S H Bakke  R Mehl 《Acta veterinaria Scandinavica》1988,29(3-4):311-314

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松材线虫对黑松几个生理生化指标的影响   总被引：7，自引：0，他引：7  

谈家金  吴慧平  杨荣铮  陈燕 《中国森林病虫》2001,20(4):3-5

8～9年生黑松经4种处理(接种松材线虫、100μg苯甲酸水溶液处理、无菌水处理并环剥主干中部树皮以及单独无菌水处理)后,研究了其流脂量、蒸腾作用及叶部过氧化物酶同工酶的变化.结果显示,接种后12天,所有接虫株松脂分泌停止;接种后27天,接虫株蒸腾作用下降最明显,其平均蒸腾强度为0.0145ml·g  相似文献   

Ghrelin在绵羊卵母细胞体外成熟过程中对BCL-2、BAX的mRNA表达的影响     

白瑞霞  曹贵方  米焱  塔娜 《黑龙江畜牧兽医》2012,(3):1-4,7,161

为了探讨Ghrelin在绵羊卵母细胞体外成熟过程中与BCL-2、BAX的相关性及Ghrelin在绵羊卵母细胞成熟过程中可能的作用机理,试验在绵羊卵母细胞成熟液中添加500 ng/mL Ghrelin,采用实时荧光定量PCR分别在0,8,16,24小时时检测卵母细胞BCL-2、BAX的表达量。结果表明:试验组添加Ghrelin后8,16小时时卵母细胞BCL-2 mRNA相对表达量显著升高(P<0.05),但成熟后16,24小时时较8小时时有下降趋势;下降到24小时时,其表达量与0小时时没有显著变化(P>0.05);8,16小时时试验组与对照组比较差异显著(P<0.05),0,24小时时差异不显著(P>0.05)。试验组添加Ghrelin后8,16,24小时卵母细胞BAX mRNA相对表达量较0小时时下降,且差异显著(P<0.05),但成熟后16,24小时时与8小时时比较有上升趋势;在8,16小时时试验组较对照组BAX mRNA相对表达量均有所下降,且差异有显著性(P<0.05),而在0,24小时时差异不显著(P>0.05)。说明Ghrelin在绵羊卵母细胞成熟过程中与BCL-2和BAX的表达存在相关性,推测Ghrelin在卵母细胞成熟过程中存在积极调控作用。  相似文献   

阿勒泰地区疣枝桦育苗技术     

许恩葆  塔拉甫 《内蒙古林业调查设计》2009,32(1):27-27

疣枝桦是阿勒泰地区广泛分布的乡土树种,文章简要介绍了疣枝桦在阿勒泰地区的分布、生物学特性以及播种繁殖过程,其中包括采种、种子处理、播种前的整地、播种、苗期管理等。文章阐述了疣枝桦育苗技术措施,在生产实践中具有较强的可操作性。  相似文献   

土霉素药渣栽培杏鲍菇可行性研究     

金亚征  忻龙祚  塔秀成  王激清 《北方园艺》2017,(20):163-167

以杏鲍菇为试材,在玉米芯中添加不同比例的土霉素药渣作为栽培杏鲍菇的辅料,对土霉素药渣栽培杏鲍菇的可行性进行研究和分析。结果表明:土霉素药渣含有木质素15.58%、纤维素39.62%、蛋白质50.02%及灰分13.15%;玉米芯中随着土霉素药渣添加比例的增加,呈现菌丝生长速率加快、满瓶天数减少的趋势,且添加适宜比例的土霉素药渣,可显著提高杏鲍菇鲜菇产量和生物学效率,其中83%玉米芯添加15%土霉素药渣的处理较优;杏鲍菇对土霉素的降解率可达到99.9%,4个添加土霉素药渣处理的杏鲍菇子实体均未检测到土霉素残留。  相似文献   

Stress and mortality in the supply chain of live scallops Pecten maximus L., from scuba diver to market          下载免费PDF全文

Astrid K Woll  Snorre Bakke 《Aquaculture Research》2017,48(2):594-607

Here, we report results from a project where the aim was to study stress and mortality in the supply chain from harvest to market for live scallops Pecten maximus L., hand‐picked by scuba divers. With experiments conducted both during the warm (September) and cold (April) seasons, emphasis was put on how mechanical influence, stacking height, post‐harvest water storage and dry transport affected scallop fitness. When scallops were exposed to mild‐ or hard mechanical shocks (dropped three times from 50 or 150 cm), it was found that hard mechanical shock caused up to 90% mortality during subsequent water storage. Results from the experiments where scallops were stored at different stacking heights (15, 30 and 50 cm) in water showed that both the duration of storage and the stacking height had a significant effect on mortality. Higher stacking heights also affected survival in subsequent transport. For long‐term storage (>7 days), it is recommended to limit the stacking height of scallops stored in tanks to reduce risk of mortality. Respiration experiments showed an average oxygen consumption of 0.10 and 0.24 mg O₂ min^?1 kg^?1 f.w. in the cold and warm season respectively. Water supply during storage of scallops should be adjusted to water temperature and biomass. Registration of mortality and analysis of the Adenylic Energy Charge of scallops followed through the production cycle from harvest to market indicate that it is the sum of stressors that are determinable for final survival.  相似文献   

Metabolism of 2-methoxy-4-ethylamino-6-sec-butylamino-s-triazine by the dairy cow and the goat     

J E Bakke  J D Robbins  V J Feil 《Journal of agricultural and food chemistry》1971,19(3):462-466

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工厂化水产养殖水质预测预警系统的设计     

他旭翔  肖瑞超  张龙  位耀光 《安徽农业科学》2017,45(22)

在对养殖水质需求分析的基础上,设计了一种水质在线实时预测预警系统。该系统具有以下功能:水质实时信息和预测信息的查询、水质预警、水质预警设置和用户管理。在多媒体可视化界面的引导下,信息操作人员可以根据养殖场的实际情况,进行各种预警指标的设定和预警方式的设置。该系统较好地解决了工厂化养殖过程中水质监测预警问题,方便了用户对养殖用水水质的监控和管理。  相似文献   

Leucoencephalomyelopathy in Australian Rottweiler dogs     

RF SLOCOMBE  R. MITTEN  TA MASON 《Australian veterinary journal》1989,66(5):147-150

Clinical and pathological studies of a neurological disorder of 3 adult Rottweiler dogs are described. Dogs developed proprioceptive losses involving the limbs, leading to progressively worsening ataxia and hypermetria. Blood and CSF fluid analyses were normal and radiographs and myelograms showed no compressive lesions of the spinal cord. At necropsy, severe demyelination of the dorsal and lateral funiculi of the cervical spinal cord was visible grossly. Microscopically there was more extensive, symmetrical involvement of the spinal cord and brain than was apparent grossly, with demyelination of white matter tracts and sparing of axons in affected areas. These changes were considered diagnostic for leucoencephalomyelopathy. This condition has not been previously reported in Australia, and is probably transmitted genetically, presumably as an autosomal recessive trait.  相似文献