株

Results The positive percentage in superficial gastritis, deep gastritis, gastritic ulcer, duodenal ulcer, chronic atrophic gastritis and gastric cancer, were 70.3, 72.2, 77.7, 69.2 and 25 respectively by URT, 59.2, 77.8, 71.4, 70.7, 75 and 78 respectively by PCR, and 48.1, 61.1, 70.3, 70.7, 66.7, 66.6 and 72.2 respectively by cagA gene probe detection.

但Hp 偏方感染人群大多无症状，只有少数人会表现不同程度的症状，Hp存在不同毒力的菌株〔4，5〕是主要原因爱情之一。cagA+株被大多数学者认为是强毒株，与消化性糖尿病溃疡、萎缩性胃炎、胃癌密切相关〔2，4〕。

Results The positive percentage in superficial gastritis, deep gastritis, gastritic ulcer, duodenal ulcer, chronic atrophic gastritis and gastric cancer, were 70.3, 72.2, 77.7, 69.2 and 25 respectively by URT, 59.2, 77.8, 71.4, 70.7, 75 and 78 respectively by PCR, and 48.1, 61.1, 70.3, 70.7, 66.7, 66.6 and 72.2 respectively by cagA gene probe detection.

但Hp感染人群大多无症状，只有少数人会表现不同程度的症状，Hp存在不同毒力的菌株〔4，5〕是主要原因之一。cagA+株被大多数学者认为是强毒株，与消化性溃疡、萎缩性胃炎、胃癌密切相关〔2，4〕。

According to the ability of the field isolates of Gibberella zeae to grow on the PSA with varying carbendazim concentrations, three sensitivity levels of isolates were determined in vitro. The sensitive isolates could grow at 0.5 μg/ml, but could not grow at 100 μg/ml. The high resistant isloates could grow faster than R at 50 μg/ml, and also could grow at 100 μg/ml.No low resistant isolates, that could grow fast at 1.4 μg/ml but could not grow at 50 μg/ml, were found among the field isolates.

根据在0.5、1.4、50、100 μg/ml等不同浓度的含药PSA平板上能否生长，将玉蜀黍赤霉田间菌株对多菌灵的敏感性划分为：敏感、中抗和高抗等3个水平，其中S菌株在0.5 μg/ml浓度下能生长，但在≥1.4 μg/ml浓度下生长受到完全抑制；R菌株在1.4 μg/ml浓度下能快速生长，在50 μg/ml浓度下能缓慢生长，但在≥100 μg/ml浓度下不能生长；HR在≥100 μg/ml浓度下仍能生长。

Studies on the mutant breeding of high-yield gibberellins strain The protoplast of Gibberella fujikuroi m978 were treated by mutation breeding forhigh-yield gibberellins, LiCl mutation was better than DES mutation or UV irradiation ifsingle mutation, but any single mutation was worse than compound mutation by whichthe mutants were more overproducting and genetically stable.

采用传统诱变育种，筛选高产菌株在原生质体条件下，对赤霉素产生菌m978的原生质体进行菌种选育；使用单因子诱变方法，LiCl处理的效果优于DES诱变和UV诱变；复合诱变比单因子诱变更容易得到高产突变株，且获得的高产突变株稳定性更优。

The fungicidal activity of methanol extract was higher than that of ethyl acetate extract, and the inhibition rates were higher than 90% against Alternaria longipes, Fusarium oxysporium, Gibberella zeae, Glomerella cingulata, Exserohilum turcicum under the concentration of 1000g/mL The results of the inhibition of spore germination indicated that the fermentation products exhibited obvious inhibition rate against Alternaria longipes, Exserohilum turcicum and Fusarium coeruleum, the EC50 values was 59.4g/mL, 96.5g/mL and 132.5g/mL. In the bioassay of the fermentation products against Bacillus sub tills and Bacillus cereus, by means of detection fo inhibition zone, the inhibition zone diameter was 20mm and 27mm. The results of pot tests that methanol extract showed higher than 70% of protective efficacy and therapeutic efficacy against wheat powdery mildew under the concentration of 2000g/mL.

其中，甲醇提取物的抑菌活性比乙酸乙酯提取物强，在1000g/mL浓度下对烟草赤星病菌、马铃薯干腐病菌、小麦赤霉病菌、苹果炭疽病菌、玉米大斑病菌的菌丝生长抑制率均大于90%；抑制孢子萌发法试验结果表明，2K3菌株菌丝体的甲醇提取物对烟草赤星病菌玉米大斑病菌和马铃薯干腐病菌的EC50分别为59.4g/mL、96.5g/mL和132.5g/mL；管碟法生测结果表明，2K3菌株菌丝体的甲醇提取物对枯草芽孢杆菌和蜡状芽孢杆菌的抑菌圈直径分别为20mm和27mm；盆栽试验结果表明，2K3菌株菌丝体的甲醇提取物在2000g/mL浓度下对小麦白粉病的治疗和保护作用均在70%以上。

The mainly results of this work are as follows: 1. To determine the genetic characterize of Gl_2~e gene, we investigated the different positions and stages of 1599 F_2 segregating plants. The results showed that 441 plants had dark-colored glands; 427 glandless plants and 761 plants with low-glands respectively.

本研究结果如下：一、分别对不同生育时期F_2群体单株各部位性状调查发现，表现为TM-1有腺体性状的411株，表现为海_1无腺体性状的427株，与F_1一样少腺体的761株，经检验符合1：2：1的分离比例X~2=4.028＜X~2_(0.05，2=5.99，进一步证明海_1无腺体性状是由一对不完全显性基因Gl_2~e控制。

A mutant strain with high yield of Nisin, which was hereditarily stable, was obtained by the astronautics mutagenesis breeding technology.

通过航天诱变育种技术，获得一株乳链菌肽高产菌株SPA2222，该菌株在遗传稳定性状上是稳定的。

Rep-PCR method was used to conduct cluster analysis to the 39 bacterial isolates. rep-PCR analysis revealed that the 39 bacterial isolates could be divided into 12 clusters at the 0.9 dissimilarity percentage level. The 39 bacterial isolates had their own specific band patterns, showing obvious genomic heterogenicity and rich genotypic polymorphism genetic diversity between each isolate.

采用rep-PCR技术对39个细菌分离株进行聚类分析，在rep-PCR图谱的相异百分数为0.9的水平上被聚类为12个类群，39个分离株各自具有独特的带型，说明各细菌分离株的基因组之间存在显著异质性，表现出丰富的基因型多态性。

To screen the sensitive and resistant yeast mutant when they treated with drug, the recombine technology of yeast gene should be applied to obtain the clone expressing the homeotic gene.

通过使用药物对特定的酵母基因突变株进行干预，筛选出对药物敏感或抵抗的突变株，然后利用酵母基因重组技术，使突变株再表达同源的基因，从而获得再表达同一基因的克隆。

From 30 different strains of fungi 11 strains of Beauveria bassiana and 1 strain of Aspergillus fumigatu were selected out, according to their ability to hydroxylate androst-4-ene-3, 17-dione by TLC for the initial screening.

本实验通过对30株真菌转化4AD甾体类化合物能力的筛选，初筛获得对4AD具有转化能力的球孢白僵菌11株，烟曲霉1株。

According to the clear water experiment, aeration performance of the new equipment is good with high total oxygen transfer coefficient and oxygen utilization ratio.

曝气设备的动力效率在叶轮转速为120rpm～150rpm时取得最大值，此时氧利用率和充氧能力也具有较高值。

The environmental stability of that world - including its crushing pressures and icy darkness - means that some of its most famous inhabitants have survived for eons as evolutionary throwbacks, their bodies undergoing little change.

稳定的海底环境─包括能把人压扁的压力和冰冷的黑暗─意谓海底某些最知名的栖居生物已以演化返祖的样态活了万世，形体几无变化。