The Diagnosis of Pancreatic Degenerative Atrophy in Dogs – a Practical Method

A convenient method was developed to diagnose pancreatic degenerative atrophy (PDA) in small animal practice based on the observations, that feeding crude soybean increases faecal protease activity in dogs with normal pancreatic function, while PDA-dogs remain completely negative in faecal protease activity.When PDA is suspected, 1 or 2 faecal samples should be investigated with the X-ray film method based on incubation for 2 h at 37°G. If any activity is seen the dog should be considered non-PDA. If no activity is seen the dog should be given food supplemented with 1 g crude soybean/kg body weight twice daily for a few days and a new faecal sample should be collected. If the activity remains negative the diagnosis of PDA is reliable.As the amount of crude soybean in the food increased, a dose dependent increase of faecal protease and amylase was seen as measured with the radial enzyme diffusion method (RED).     

蒸发器中杀菌器的设计

降膜式蒸发器中杀菌器设计不合理，短时间内会产生结焦，迫使清洗间隔时间缩短，对热敏性物料如牛奶等会引起蛋白变性。以RNJM03—5000型三效降膜式蒸发器在奶粉生产中的应用为例，就如何合理设计杀菌器进行阐述。     

南京地区香根草冬季栽培技术研究

连续两年的研究结果表明，只要采取合适的覆盖措施在南京地区寒冬季节移植香根草是可行的。在所有供试处理中。覆膜措施效果最好，不但可以保证冬季种植的香根草春季返青成活率高于80％，春季返青时间比同期其它措施提前1～11d，而且防寒效果相对稳定，其它措施的防寒效果会随着移栽季节的不同而发生变化。研究还显示：南京地区大约12月中下旬至次年1月低温期间采用覆膜措施才能呈现出它的优势。在冬季最冷季节内移栽香根草时，覆膜措施与其它覆盖处理存在显著差异，而其它时段采用覆膜措施尽管防寒效果也相对较好。但与其它处理之间没有显著差异。     

全生物降解地膜覆盖对旱地土壤水分状况及春小麦产量和水分利用效率的影响

The purpose of this study was to investigate the ecological effect of full biodegradable film mulching and its effect on the production of spring wheat, and to seek a green, efficient and sustainable coverage in the semi-arid area of the Northwest Loess Plateau. Taking the uncovered land as the control (CK), to systematically studied the effects of full biodegradable film mulching (BM) and the polyethylene film mulching (PM) with bunch planting on soil water status, rain fallow efficiency and its impact on yield and water use efficiency of dryland spring wheat from 2015 to 2018. The results showed that both BM and PM significantly increased the water storage of 0-200 cm soil layer and rain fallow efficiency in each growth period of spring wheat, but there was not significant differences between BM and PM. From 2015 to 2018, the water storage of BM increased by 9.5 mm, 14.2 mm, 25.0 mm, and 39.0 mm respectively compared with CK. In the fourth year of continuous cropping, the water storage of PM, BM and CK 0-200 cm soil layers were 347.5 mm, 345.5 mm and 320.0 mm, respectively. Compared with CK, the rain fallow efficiency of BM and PM increased by 39.63% and 43.98%, respectively, which effectively alleviated the risk of spring drought in the next season. BM was similar to PM in seedling rate, the number of productive ears and the percentage of productive spike, and significantly higher than CK. The number of BM seedlings increased by 15.87% compared with CK in dry year, the number of productive ears increased by 14.70% on average in other years except 2015, and the percentage of productive spike increased by 3.08% on average in four years. The total amount of dry matter accumulation of BM was basically the same as PM, and before anthesis was slightly lower than PM, but higher than PM after anthesis, which was more conducive to grain filling and yield formation, and the amount of dry matter accumulation of both BM and PM are significantly higher than CK in each growth period. The annual average water consumption of PM, BM and CK was 287.46 mm, 289.76 mm, and 276.06 mm, respectively, and compared with PM, BM increased the evaporation water consumption. Compared with CK, the grain yield of BM and PM increased 48.07% and 54.95% respectively, and water use efficiency increased 46.08% and 56.07% in four years, there was not significant differences between BM and PM. There was not significant differences in soil water effect and yield effect between the full biodegradable film and PE film, and the full biodegradable film can be applied to the whole field soil-plastic mulching with bunch planting of spring wheat in dry land and provide technical support for the green and efficient production of wheat in dry land.     

The tear film and ocular mucins

Abstract The trilaminar tear film, composed of the lipid, aqueous and mucin layers, has many functions including defending the ocular surface. The aqueous layer has several soluble antimicrobial factors that protect the ocular surface. Ocular mucins have recently been studied with regard to their role in the defense of the eye as well as in dry eye syndromes. To date, 15 mucin genes have been identified, and six of these mucin genes are localized to or secreted by ocular glands or epithelia. Understanding the production, secretion and function of ocular mucins will aid in the treatment of dry eye syndromes and ocular surface microbial infections.     

漆酚镧螯合物的性质及对漆酚改性涂膜性能的影响研究

制备出漆酚镧螯合物 ,测定了其组分、溶解性、红外光谱、自燃点、分解温度等性质。研究了螯合物对漆酚 酚醛清漆、漆酚环氧清漆涂膜性能的影响     

渗水地膜覆盖玉米试验研究综述

多年多点试验示范表明:渗水地膜覆盖玉米增产效果显著,主要表现为单株生产力的提高,在年均积温较小的地区增产幅度大.增产机理在于土壤含水量、地积温、土壤微生物、表土肥力等土壤微生态几方面均有改善.     

沙漠增温效应下膜下滴灌棉田的小气候特征研究

根据沙漠增温效应下膜下滴灌棉田植被层内小气候观测资料,分析研究了棉田植被层内的净辐射、地温和相对湿度的变化.试验研究表明,膜下滴灌棉花花铃期在光、温、湿等方面具有较好配置,从而可充分利用光热资源,提高棉花的产量和品质.     

有色膜覆盖对姜叶片色素含量及光合作用的影响

在姜幼苗期分别采用绿色膜、红色膜和蓝色膜进行覆盖处理,均可显著提高全生育期内叶片叶绿素和类胡萝卜素含量,但不同处理在不同生育期的效果不同,幼苗期覆膜条件下,以蓝膜处理较高,红膜处理较低,绿膜与蓝膜处理之间无显著差异;而旺盛生长期撤膜后,绿膜处理逐渐较高,蓝膜处理次之,红膜处理仍较低。姜全生育期内叶片的光合速率始终以绿膜处理较高,红膜处理次之,蓝膜处理较低,但均显著高于对照,7月19日幼苗期覆膜条件下,其11时光合速率分别比对照提高28.0%、16.3%和8.9%;9月8日旺盛生长期撤膜后,11时光合速率分别比对照提高21.3%、12.5%和5.9%。此外,有色膜覆盖可创造较好的温光环境,减轻光合午休,但未改变光合作用的日变化规律。     

宁南山区地膜玉米隔沟灌溉试验研究

隔沟灌溉技术是一项新型的节水灌溉技术,在国内外都已进行了较长时间的研究和推广,但在宁南山区尚没有推广应用的报道.2004年“北方半干旱集雨补灌旱作区(宁夏彭阳)节水农业技术体系集成与示范”课题引进该项技术,在宁夏彭阳王洼示范区进行了地膜玉米隔沟灌试验研究.结果表明,隔沟灌与全灌相比,产量相近,水分利用效率增加了12.44%,但用水量只有全灌的一半;与不灌溉相比,经济产量和水分利用效率分别增加了38.24%和38.65%.