浅谈桥梁混凝土工程的裂缝处理

随着国民经济的发展,桥梁混凝土工程越来越多,本文对某预应力混凝土桥梁施工后,再其拱脚和边角处发现了裂缝,对其裂缝的成因进行了总结,具体对其处理措施进行了分析,以便在以后的工程中能采取有效的预防措施。     

SDC3的功能及其研究进展

鉴于Syndecan-3 (sdc3) 在能量平衡的调节中起到关键作用,本文对其基本结构和功能做了一个简单的介绍,对其杌理做了一些大胆的讨论,并对其以后的研究方向提供了一些建议.     

菌糠在饲料中的应用研究

对食用菌废弃菌糠的资源量及其利用现状进行了分析,对其营养价值进行了归纳总结,对其消化率和饲用安全性等进行了阐述,简要概括了菌糠在畜禽日粮中的应用效果,并简单介绍了其加工调制方法及其在生产应用中需注意的问题和事项.     

两种优良野生草坪植物生态生物学特性分析

通过1998～2000年对野生宿根画眉草和鼠尾粟观察,对其形态特征和生物学特性进行了鉴定分析,从草坪和水土保持植物利用的角度对其进行建坪试验和水土保持试验,发现其具有优良坪用性状和水土保持效果.并对其特性作了综合性描述.     

纳米陶瓷涂料介绍及其应用现状

本文主要对纳米陶瓷涂料的种类、性能进行了介绍,总结了其目前主要应用的领域,并对其发展前景进行了展望。     

两种优良野生草坪植物生态生物学特性分析

通过 1 998～ 2 0 0 0年对野生宿根画眉草和鼠尾粟观察 ,对其形态特征和生物学特性进行了鉴定分析 ,从草坪和水土保持植物利用的角度对其进行建坪试验和水土保持试验 ,发现其具有优良坪用性状和水土保持效果。并对其特性作了综合性描述。     

红曲霉菌在畜牧业中的研究现状及应用前景展望

本文对红曲霉菌及其代谢产物进行了介绍,并对其在畜牧业中研究现状及应用前景进行了综述。     

饲料中植物单宁的抗营养性及其生物降解

由于植物单宁分子结构和化学性质的特殊性 ,使其对食草动物具有抗营养作用。植物单宁的生物降解是解决其抗营养作用的有效途径。本文综述了对植物单宁的抗营养性及其生物降解的研究进展 ,并根据作者本人的研究体会 ,对其机理进行了阐述。     

外来植物黄顶菊的入侵机制及生态调控技术研究进展

黄顶菊是近年来入侵我国的一种外来植物,其强大的繁殖能力和入侵性已经对生态环境造成了严重的危害,同时也威胁到农业生态安全。基于此,笔者围绕黄顶菊入侵的生态学机制和生态调控方法等进行了综述。首先,黄顶菊的化感作用和其对不利环境条件的快速适应能力对其入侵扩张具有重要作用;其次,黄顶菊和土壤生态系统之间可能形成“正反馈”作用机制,而这种机制又进一步促进了其成功入侵,其对土壤生态系统包括对养分循环、酶活性和微生物的组成和功能等均产生了深远影响;最后,遵循种群演替的基本规律,可通过建立能与黄顶菊抗衡的本地植被实现生态重建从而达到遏制其扩张,其中选择竞争力强且适合当地气候条件的植物材料至关重要。在此基础上,笔者围绕如何有效控制黄顶菊的危害尚需开展的工作进行了展望,以期为实现对其有效管理和利用提供参考。     

食用菌在秸秆生物转化饲料中的应用

论文对我国农作物秸秆的资源量及其利用现状进行了分析,对秸秆的结构、作为饲料的限制因素和食用茵对其降解机理进行了介绍,归纳了食用菌对其化学成分和消化率的影响,概括了食用茵在降解秸秆开发饲用酶制剂中的应用,并探讨了在生产应用中存在的问题.     

2010年春秋两季家蚕品种农村饲养比较试验

2010年春秋两季,分别对4对家蚕新品种进行了农村饲养比较试验,调查了各品种蚕期饲养性状、茧丝质成绩等,了解其性状特点以及对湖北蚕区气候条件的适应性,并分析农村大面积示范推广的可能性。     

不同紫云英品种物候期及主要经济性状研究

在福建省对15个紫云英Astragalus sinicus品种(系)生长生育过程的特征和特性进行研究,结果表明:所选育并正在扩繁的8个品种(系)8410441、8324411、84471031、8428121、84341022、8487711、闽紫6号和8454311表现中熟,生长性状表现良好,各项指标优于从外省引进的品种,特别是盛花期鲜草产量都比引进种常德种有显著的提高,说明这8个品种(系)可以进行大规模扩繁鉴定,为紫云英育种提供优良材料。     

蚕蛹不同溶解性蛋白的营养学评价及酶解物对血管紧张素转换酶的抑制活性

分别对缫丝蚕蛹中的水溶性和碱溶性蛋白组分进行营养学评价,为高效开发蚕蛹食品提供依据;通过蚕蛹蛋白酶解产物对血管紧张素转换酶(ACE)的体外抑制活性试验,探讨蚕蛹蛋白作为天然降压药品原料的利用潜力。营养学分析表明:蚕蛹蛋白水溶性和碱溶性组分中的氨基酸种类齐全,且必需氨基酸占总氨基酸的质量分数分别为41.2%和39.2%,明显高于WHO推荐的氨基酸组成模式(>36%);蚕蛹水溶性蛋白有第1～第4限制性氨基酸(依次为亮氨酸、异亮氨酸、缬氨酸和苏氨酸),而蚕蛹碱溶性蛋白仅有第1和第2限制性氨基酸(依次为蛋氨酸+胱氨酸、异亮氨酸),2种溶解性蛋白的生物效价均较低,在开发利用中,应补充限制性氨基酸或与其它蛋白搭配使用,以提高产品的营养价值。体外ACE抑制活性试验表明,蚕蛹的水溶性蛋白和碱溶性蛋白的碱性蛋白酶酶解产物均具有较强的ACE抑制活性,IC50值分别为0.121、0.113 mg/mL,2种蛋白有可能成为降血压肽生产原料。     

Comparison of microsatellite and blood group diversity among different genotypes of cattle

Genetic variability and relationships among five cattle breeds (Holstein, Pinzgau, Limousin, Slovak Spotted and Charolais) bred in the Slovak Republic were investigated separately using 11 microsatellite markers and 61 blood group systems. Allele frequency, heterozygosity (Ho, HE) and PIC values were investigated. F-statistics were computed separately. For microsatellite markers FIS, FIT, FST and for blood groups HS, HT, GST parameters were calculated. Microsatellite and blood group comparison showed similar results by F-statistics but some differences were marked using the other methods. Both methods were able to detect close relation between Slovak Pinzgau and Slovak Spotted cattle breeds. Their relation was confirmed by genetic distance, principal component analysis (PCA) and coefficient of admixture (mY). Important divergences between different markers used in the study were observed by the characterisation of Limousin and Charolais breeds.     

Observations on mouse-infective stocks of Cowdria ruminantium: microscopical demonstration of the Kwanyanga stock in mouse tissue and the carrier-status of the Senegal stock in mice

The behaviour of two different stocks of Cowdria ruminantium was investigated in mice. The mouse-pathogenic Kwanyanga stock of C ruminantium was microscopically demonstrated in mice in capillary endothelial cells of the lung, spleen, kidney, liver and brain. Mice of the ninth passage of the Senegal stock, which is infective but not pathogenic to mice, were kept alive for a year. Their blood and homogenised spleens, inoculated intravenously, caused fatal heartwater in a goat. However, the Senegal stock could not be demonstrated microscopically in mice. These results indicate the possible role of rodents in the epidemiology of heartwater.     

Properties of acid beta-galactosidase from fowl spermatozoa

1. Two forms, I and II, of beta-galactosidase [EC 3.2.1.23] from fowl spermatozoa were separated by Blue-Sepharose CL-6B chromatography. 2. The two forms of the enzyme yielded different pI values (4.1 and 4.7 for form I and 5.3 for form II). 3. Their gel filtration patterns were also different: form I resolved into two peaks with Mr about 65,000 and 80,000, whereas form II resolved into a single peak with an Mr of about 65,000. 4. Both forms had similar optimum pH, pH stability, thermal stability and Km values. 5. Differences between the characteristics of beta-galactosidase forms from spermatozoa and from seminal plasma suggest that the beta-galactosidases investigated in this study are spermatozoa-specific.     

日本结缕草体细胞变异表型和分子标记的研究

结缕草（Zoysia japonica）是重要的暖季型草坪草。本研究以1粒种子诱导的愈伤长期继代后的再生植株为材料,在大田中分小区种植,测量其植株表型数据,并同时利用ISSR标记对遗传变异进行分析。在形态和遗传上研究日本结缕草的体细胞变异水平和特征。结果显示,日本结缕草体细胞表型变异中匍匐茎数量和绿色期变异系数较大。10个表型性状经过主成分分析发现,重要表型指标分散,前5个主成分可以代表整体坪用表型,其中第1主成分可以代表直立茎指标,第2主成分代表匍匐茎蔓延能力和生殖枝高度。ISSR标记分析遗传多样性显示,再生植株多态性条带率83.6%,特异性条带15.1%,具有丰富的遗传多样性。本研究可为日本结缕草获得丰富优异变异提供快捷途径,并有利于根据结缕草体细胞变异特点确定育种方向,快速培育新品种。     

高温干旱胁迫下三个多年生黑麦草品种叶绿体和线粒体超微结构的变化

以多年生黑麦草的3个草坪型品种爱神特、百舸和球道为试验材料,研究了在高温和干旱胁迫下,各品种叶肉细胞叶绿体和线粒体等超微结构的变化情况。结果表明,35℃连续高温胁迫下3个品种的叶绿体均膨大变圆,并向细胞中央靠拢,且叶绿体内部分布有一定数目的脂质球体;PEG-6000(w/v)溶液(浓度为25%)处理的干旱胁迫下以球道的叶绿体结构受干旱胁迫伤害程度较重,出现基粒和被膜轻度破损,片层膨胀分化或溶解消失。高温干旱胁迫下3个品种的线粒体形态变化不甚显著,但其数量均有所增加,且3个品种叶肉细胞线粒体对高温干旱胁迫的耐受性均强于叶绿体。爱神特对高温干旱胁迫处理的耐受性相对较强,球道和百舸的耐热抗旱性较弱,但两者差异不明显。     

Organ Distribution of Some Clinically Important Enzymes in Mink

The activity and relative distribution of eight clinically important enzymes were measured in nine different organs in 10 healthy minks. Of the enzymes studied, OCT, ASAT and ALAT had higher absolute activities when compared to many other animals. This is believed to be adaptation to a high protein diet. OCT shows absolute liver specificity, and even ALAT is relatively liver specific in mink. SDH is found in relatively high concentrations in the liver as well as in the kidney. The organ distribution of the other enzymes investigated in mink – AP, CK, γ-GT and LD – is much the same as in many other animal species. Their clinical significance in serum is therefore the same.     

Subpleural lymph nodes in goat lungs

Subpleural lymph nodes were found in more than 4% of 3245 goat lungs during a slaughterhouse survey of respiratory disease. Their frequency varied between flocks from 2% to as much as 27%. They were more common in feral goats than in crossbreds or Angoras. Their numbers were positively associated with carcass weight and the number of nodular muellerius lesions on the lung surface. Their distribution and architecture were different from the pulmonary lymphoid nodules described in cattle with dictyocaulus re-infection syndrome.