信息化促进西南森林航空消防事业发展

简要介绍了西南航空护林总站信息化建设的历史和现状,以及不同时期信息化建设在西南森林航空消防工作中所发挥的作用,结合当前森林防火工作形势,阐述了下一步信息化建设的原则和目标。     

湖南重点产竹县竹产业发展现状与发展趋势

在总结湖南省重点产竹县竹产业发展现状的基础上,对比分析重点县的竹产业发展现状,剖析当前该省竹产业发展方面存在的主要问题,并提出了发展趋势。     

俄罗斯森林资源与木材生产分析

根据俄罗斯森林资源与木材生产发展状况, 探讨了俄罗斯森林资源的特点, 总结了俄罗斯木材生产面临的主要问题, 提出了俄罗斯林产品的品种和产量走势, 分析了俄罗斯森工行业和木材生产的发展机遇, 展望了中俄森林资源合作开发与林产品贸易和林业双边合作的发展前景。     

Frequent mutation of BAP1 in metastasizing uveal melanomas

Metastasis is a defining feature of malignant tumors and is the most common cause of cancer-related death, yet the genetics of metastasis are poorly understood. We used exome capture coupled with massively parallel sequencing to search for metastasis-related mutations in highly metastatic uveal melanomas of the eye. Inactivating somatic mutations were identified in the gene encoding BRCA1-associated protein 1 (BAP1) on chromosome 3p21.1 in 26 of 31 (84%) metastasizing tumors, including 15 mutations causing premature protein termination and 5 affecting its ubiquitin carboxyl-terminal hydrolase domain. One tumor harbored a frameshift mutation that was germline in origin, thus representing a susceptibility allele. These findings implicate loss of BAP1 in uveal melanoma metastasis and suggest that the BAP1 pathway may be a valuable therapeutic target.     

黄淮麦区不同生态型小麦籽粒灌浆特性分析

以目前河南省生产上推广的小麦品种和河南省洛阳市农业科学研究院新培育的小麦品种为材料,用Logisitic方程对黄淮麦区不同生态型小麦品种的籽粒灌浆过程进行了拟合;用变异系数法分析了各灌浆参数的变异大小,用相关分析研究了灌浆参数与粒重的关系。结果表明,旱地各灌浆参数变异系数均大于水地,水旱地品种均为T3、R3的变异系数较大,其次是R1和R;水地品种间Tmax和T差异小,相对稳定;旱地品种R2和T相对稳定。水地品种中,最大灌浆达到时间Tmax、最大灌浆速率Rmax、平均灌浆速率R和各阶段灌浆速率是影响其粒重的主要因素,其中R对粒重的影响达极显著水平;而对旱地品种,与粒重显著相关的灌浆参数为R3、R、T2。针对河南省豫西丘陵地区小麦灌浆后期常有干热风的气候特征,通过栽培措施协调不同生态型小麦品种灌浆速率与持续时间的矛盾,针对不同灌浆特点选育不同用途小麦品种,从而达到增加粒重、获得高产的目的。     

无定河中游左岸监测区潜伏的土壤退化问题及其对策研究

本文在对无定河中游左岸监测区流域内农林业生产基地及主要农业作物进行详细调研后,选取不同地形结构(坡地、梯田和坝地)、不同措施配置(乔木林、灌木林)等10种农业用地的地类,进行土壤理化指标监测,并对监测结果进行横向和纵向两个层面分析,发现各种地类的各类指标均存在着不同水平的退化趋势,并针对问题提出了3项治理措施。     

The dynamics of bacterial community in a polyculture aquaculture system of Penaeus chinensis,Rhopilema esculenta and Sinonovacula constricta

Polyculture with Chinese shrimp Penaeus chinensis, jellyfish Rhopilema esculenta and razor clam Sinonovacula constricta (S.J.R) is a common aquaculture system in Dandong, China. Investigation on the composition and function of microbial communities and their relationship with environmental factors in aquaculture systems have crucial implications. Therefore, the sequencing of 16S rRNA gene was applied to profile the bacterial community composition of water and sediment in S.J.R polyculture system in the present study. Proteobacteria was the dominant phylum in S.J.R polyculture ponds following with Actinobacteria and Bacteroidetes in water; in contrast, more diverse phyla were detected in sediments. Water temperature, pH and dissolved oxygen were determined the bacterial community composition in the S.J.R polyculture systems. Specially, Planktomarina, PS1 clade, Candidatus Aquiluna and Fibrobacteres, which can resist the phytoplankton blooms or degrade the cellulose, were more abundant in water at the early stage of cultivation in the S.J.R polyculture system. Moreover, the functions of bacterial communities in water were mainly associated with cell communication mediated, while the functions related to basal metabolism were enriched in sediments. The findings of this study allowed us to better understand the bacterial community in the S.J.R polyculture system and accumulated data for the improvement of cultural management.     

基于永磁操动机构的真空开关动力学特性分析

真空开关利用新型的永磁机构作为操动系统,具有较高的操作精度与可靠性。在建立了永磁操动机构动态特性数学模型的基础上,分析了永磁机构的运动特性。在试验过程中实测了真空开关的动态参数,将实测结果与理论计算进行分析比较,结果表明数学模型与计算方法准确可靠。     

转基因作物的生态环境安全性

转基因作物是一把“双刃剑”,既带来了巨大的经济效益,也给自然生态环境带来了一些不利影响。一是对非靶标生物的影响;二是基因逃逸问题;三是转基因作物生存优势的影响。但是,种植转基因作物可以减少农药对人畜的伤害,可以进行保护地耕作,可以利用转基因作物消除环境中的重金属等污染物。为此,必须对转基因作物的研究和利用采取一种系统的思维方式,对其过程要进行严格管理和监控。     

我国农业科技园区存在的问题及发展对策探析

文章分析了农业科技园区在规划建设、运行管理、科技、机制创新等方面存在的问题并提出了相应的对策建议,以期为农业科技园区的有效运行提供参考依据。