砖混结构住宅楼温度裂缝的分析及防治方法

对砖混结构住宅楼顶层墙体普遍存在的温度裂缝作了分析，提出了在建筑、结构设计时为控制裂缝应采取的预防措施，以及对温度裂缝的加固处理方法，并以工程实例予以说明。     

速生杉木为基材的水曲柳薄木贴面初步研究

以速生杉木为基材，水曲柳薄木为贴面材料，用脲醛树脂粘剂（UF）和聚醋酸乙烯醋乳液胶（PVAc）按一定比例混合后作为胶粘剂，热压贴面胶合，对温度和时间与巾面效果的关系进行了研究。结果表明：①用UF与PVAC比例混合的胶粘剂，在生杉木上进行水曲柳薄木贴面是可行的；②热压温度和时间对贴面效果的影响都是极显著的，并得到了一种较理想的薄木贴面热压工艺。     

He—Ne激光照射对牛超排效果的影响机理

试验采用Ｈｅ－Ｎｅ激光穴位照射供体母牛，并结合纯化ＦＳＨ超排处理，以研究激光照射对牛超排效果的影响机理。结果表明：①Ｈｅ－Ｎｅ激光照射可提高牛超排效果，增加胚胎数和可用胚胎数，试验组头均胚胎数比对照组多２．２枚，头均可用胚胎数比对照组多１．９枚，差异显著（ｐ〈０．０５）；②Ｈｅ－Ｎｅ激光照射通过神经和体液调节，可显著提高血浆中ＦＳＨ（促卵泡素）水平，而ＦＳＨ水平升高是促使供体母牛卵泡发育，增加胚胎     

公路改扩建工程路基相对沉降的防治

本文就公路改扩建工程路基的整体性，稳定性进行分析，从设计施工诸方面提出一系列的保证质量的技术措施，仅供参考。     

哈尔滨市化肥施肥结构调整对发展质量效益农业影响的探讨

通过调查研究认为，哈尔滨市化肥施肥结构有明显的地域性和依作物种类分配的特点，这种施肥结构存在很多问题，必须进行调整。通过化肥施肥结构的调整，增加氮钾肥用量，降低磷肥用量，可以显著同全市粮食作物的产量和质量，年降本增效获纯经济效益达２．４５亿元，对发展质量效益农业具有重大意义。     

富平县东新村以节水为中心的农业综合调查与规划

在对东新村社会经济基本情况，农业气候资源，水资源及灌溉现状，土地资源及利用现状和种植业现状进行调查的基础上，对东新村当前的农业生产现状进行了综合分析评价，认为东新村光，热，土地资源丰富，但属严重缺水灌溉，在渭北地区具有典型代表性，具有建立以节水为中心的农业综合综合试验区的基本条件和要求，最后就今后４－５年内的规划提出了初步设想。     

弯曲针线虫对茶树的致病性和发生规律

 弯曲钏线虫(Paratylenchus curvitatus)是福建省茶园中普遍分布的一种植物寄生线虫。在一些茶园的茶树根围线中区系中,这种线虫的虫量占92%以上,100克茶根围土壤中可含弯曲针线虫达1500-2000条。     

Evidence of durable resistance in nine Chinese land races and one Italian cultivar ofTriticum aestivum toPuccinia striiformis

In this study carried out from 1987 to 1994, in a very conducive environment to stripe rust, nine Chinese land races and one Italian cultivar of wheat showed fair levels of quantitative resistance to rust disease. The nine old Chinese cultivars had a commercial planting history in this conducive environment ranging from 20 to 100 years, in a cultivation area of 20 to 467 thousand hectares p.a. with no apparent erosion of resistance. The Italian cultivar has been used commercially for 15 years in China without showing a decrease in the level of quantitative resistance. All these data warrant the conclusion that the ten cultivars have a form of durable resistance to stripe rust.     

Fluoroquinolone-resistant Campylobacter in animal reservoirs: dynamics of development, resistance mechanisms and ecological fitness

Thermophilic Campylobacter species, including Campylobacter jejuni and Campylobacter coli, are responsible for foodborne campylobacteriosis in humans and are increasingly resistant to fluoroquinolone (FQ) antimicrobials. The therapeutic use of FQ antimicrobial agents in food animal production, particularly in poultry, has become a concern for public health, because the practice may promote the emergence of FQ-resistant Campylobacter that can be transmitted to humans through the food chain. Recent studies have indicated that Campylobacter displays a hypermutable phenotype in response to in vivo treatment with FQ antimicrobials, resulting in the rapid emergence of resistant mutants. Distinct from other Gram-negative bacteria, the acquisition of FQ resistance in Campylobacter does not require stepwise accumulation of gyrA mutations and overexpression of efflux pumps, and is mainly mediated by single-step point mutations in gyrA in the presence of a constitutively expressed multidrug efflux pump, CmeABC. The simplicity of the resistance mechanisms may facilitate the rapid adaptation of Campylobacter to FQ treatment. The FQ-resistant Campylobacter mutants derived from chickens do not show a fitness cost in vivo and are ecologically competitive in the colonization of chickens even in the absence of antimicrobial selection pressure. These findings suggest that FQ-resistant Campylobacter may continue to persist regardless of antimicrobial usage, and highlight the need for extra effort to prevent the occurrence and spread of FQ-resistant Campylobacter in animal reservoirs.