动态边界条件下一类强阻尼波动方程解的爆破

考虑了一类具有Kelvin-Voigt阻尼的波动方程.运用位势井理论,通过构造稳定集和不稳定集,结合能量分析的方法,首先证明了当初值属于稳定集时,该问题存在整体解;其次证明了强阻尼项的存在使得问题的解一致趋近于零,且具有指数衰减速率;最后给出了解在有限时间爆破的充分必要条件.     

让幸福梅林的二梅产业走上可持续发展之路

该文在简要分析幸福梅林的梅文化和二梅资源优势的基础上,提出了使幸福梅林“二梅”产业可持续发展的思路:加强规划,获取政府支持;通过办节办会、特色餐饮、促销代销二梅产品的方式加强宣传,建立特色旅游品牌;加快二梅配置和景点建设;走“科研+公司+基地+农户”的发展模式,就近开拓市场、针对性的开展外销;培养专业技术人才,用梅花精神探索和开拓二梅产业的发展。     

四川生态区甘蓝型油菜自交种和自然种品质成分的比较(英文)

[Objective] This study was to reveal the differences in crude fat and glucosinolates between self pollinated seeds and naturally pollinated seeds in Brassica napus in sichuan ecological region. [Method] Near-infrared spectroscopy method (NIRS) was employed to measure the quality components in self pollinated seeds and naturally pollinated seeds of 861 shares of Brassica napus from Sichuan ecological region. And correlation analysis and regression analysis were conducted based on the experimental data via SPSS (statistics package for social science). [Result] The contents of crude fat in the self pollinated seeds were commonly a higher than that in the naturally pollinated seeds at 0.01 significant level; while the contents of glucosinolates in the self pollinated seeds and the naturally pollinated seeds were insignificantly different. Both the correlation relationship and linear regression for the crude fat between the self pollinated seeds and naturally pollinated seeds reached the significant level. The regression equations for the contents of crude fat(y1) and glucosinolates(y2) in the naturally pollinated seeds and of crude fat(x1) and glucosinolates(x2) in self pollinated seeds were respectively determined to be y1=16.844+0.614x1 and y2=-0.620+1.017x2. [Conclusion] In Brassica napus breeding, crude fat in naturally pollinated seeds should be emphatically taken into account, meanwhile concurrently considering that in self pollinated seeds; while glucosinolates in both the self pollinated seeds and the naturally pollinated seeds must be simultaneously concerned.     

甘蓝型油菜新不育系恢复材料花药培养影响因素的研究（英文）

Some influential factors of anther culture were studied preliminarily by conducting anther culture of the restorers of new cytoplasmic male sterile(NER).Several results were obtain from this experiment and they were listed as follow:① MS cultrure medium with such hormones as 2,4-D 2 mg/L,6-BA 0.5 mg/L,NAA 0.5 mg/L was the best suitable for callus induction of NER.②The difference of induction rate was significantly different between different plant age groups.From the 110th day to 141th day,the induction rate was increased with the increase of age and the difference of induction rate reached 0.01 significant difference level.The induction rate reached the highest value in the 141th day then it declined gradually.③The combined use of 2,4-D and 6-BA with proper increase of 2,4-D was good for inducing callus.④The green plantlet induction rate of NER was increased when the concentration of 6-BA increased from 2 mg/L to 4 mg/L.Adding ZT from 0.5 mg/L to 2 mg/L,6-BA would led 2.47% increase of green plantlet induction rate.     

安宁河流域鸭瘟、鸭霍乱综合防制研究Ⅰ．鸭瘟母源抗体测定

本试验测定了母鸭免疫后不同时期所产雏鸭的母源抗体及其卵黄吸收情况。结果表明：（１）１～４周龄雏鸭血清中均含母源抗体，在１～３周内可获得不同程度保护。５～８ｄ为母抗高峰期，保护率１００％（６／６），３～４ｄ和１０～１４ｄ的保护率８３．３％（５／６），２０ｄ后保护率不到５０％。（２）同居感染结果，５日龄保护８０％（４／５），１０日龄保护４０％（２／５），１５日龄２０％（１／５），２０，２５日龄均无存活。（３）正常情况（脐带收得好）下，出壳７２ｈ卵黄吸收率达８４．８％，１２０ｈ吸收率９５．１％，１７２ｈ几乎全部（９８．９％）吸收。     

不同染色剂对水稻酯酶同工酶电泳显色相对强度差异的影响

以α-和β-萘乙酸酯为底物,以固蓝 B 盐和 RR 盐为偶联剂,用聚丙烯酰胺垂直平板电泳技术研究了水稻酯酶同工酶的电泳显色,结果为①少数酶带只能用α-萘乙酸酯显示;绝大多数酶带可用α-或β-萘乙酸酯显示。②用α-和β-萘乙酸酯同时显色时,一些单独用α-或β-萘乙酸酯能显示的酶带的相对染色强度或者降低(甚至酶带完全消失),或者增加。③用固蓝 B 盐作偶联剂与用固蓝 RR 盐相比,某些酶带的相对染色强度增加。因此,各电泳酶带染色强度的相对强弱并不一定反应各酶本身活性的相对高低。     

黑熊肾上腺的解剖及组织形态结构观察

对黑熊的肾上腺进行大体解剖及组织形态观察。结果表明,肾上腺的组织结构被分为被膜、皮质和髓质。肾上腺的被膜由不规则的结缔组织构成,偶见少量的平滑肌纤维,并且在被膜上有类似未分化细胞。皮质最厚,根据细胞排列和形态的不同,从外向内分为球状带、束状带和网状带。其中束状带是皮质中最厚的一层。髓质细胞排列成索,并且髓质中央有一大的静脉,称中央静脉。     

金沙江干热河谷不同栽培模式下桑树年片叶量与树势间的相关分析

分析了植物篱桑和地埂桑的年片叶量（Y）、桑树的有效条数（NB）、平均有效条长（LB）、条粗（DB）、平均每m条着叶数（NL）等数据，研究了年片叶量与其它各因子之间的相关关系。结果表明，植物篱桑的年片叶量与平均有效条长和条粗极显著相关；地埂桑的Y与有效条长、条粗极显著相关，与每m条着叶数显著相关；将两种种植模式下的桑树作为一个整体，则Y与NB、LB、DB、NL等因子相关极显著。建立了植物篱桑、地埂桑和整体的Y与显著相关DB、NL等因子相关极显著。建立了植物篱桑、地埂桑和整体的Y与显著相关因子之间的最优数学回归模型。文章同时指出，植物篱桑和地埂桑的树势间存在的极显著差异导致了桑叶产量之间的差异，对产生这些差异的原因也作了讨论。     

东北黑熊不同基因组DNA模板来源的比较研究

文章主要探讨使用黑熊毛发作为试验材料替代其他生物样品进行遗传多样性研究的可行性,筛选满足试验需求的最佳使用量.以延边白头山制药有限公司养熊场的4头成年东北黑熊为试验材料,分别5次拾取2头黑熊铁笼内散落的带有毛囊的50、100根毛发,对麻醉的2头黑熊抽取全血3 mL以及皮下结缔组织1 g,并分别采用不同方法提取基因组DNA.以微卫星位点ABB12和UT35为引物,设置20、50、100 ng·μL-13种模板浓度进行PCR扩增.结果显示,采用50 ng·μL-1的模板浓度均可获得较好的PCR产物,采用聚丙烯酰胺凝胶电泳对扩增基因具有较好的分辨效果.毛发DNA、血液DNA和组织DNA的PCR产物数量和质量并无明显差异.毛发数量与所提取的DNA浓度有一定关系.利用15个毛发DNA的PCR产物进行聚丙烯酰胺凝胶电泳,均可观察到清晰的条带.研究结果进一步证明毛发DNA可作为东北黑熊遗传多样性研究的试验材料.     

建设二滩水电站库区防护林体系的探讨

针对二滩水电站库区水土流失的现状,提出实施库区防护林体系的分类建设技术,并探讨了有关的建设保障措施.