吉林通化地区杨树栽培的生态区划

选取通化地区与杨树生长有密切关系的、具典型代表和鲜明时空分布规律的气候因子和自然地理因子作为统计指标,运用聚类分析方法对全区林业生态环境进行分类区划,划分为4个气候小区;调查全区26个引种的杨树生长状况,重点针对其抗寒性进行分类分级;针对杨树新品种与该地区环境适应性关系,确定杨树栽培的生态区划结果,并对每一气候小区的特殊情况具体分析,提出杨树引种栽培的科学依据．     

果蝇复眼形成过程中的靶波

本文用数值方法,求出了果蝇复眼形成过程的靶波解并对解的稳定性和临界点的分叉问题进行了分析．     

关于极限定理的一个新结果

设{X_n,n≥0}是可列非齐次马氏链,S_n(i_1,…,i_m,w)表示m元状态序组(i_1,…,i_m)在序列(X_1,…,X_m),(X_2,…,X_m 1)…,(X_n,…,X_n m-1)中出现的次数．本文通过利用{X_n,n≥O}在Wiener概率空间的一种实现,给出了关于S_n(i_1,…,i_m,w)的一个对任意可列非齐次马氏链普遍成立的强级限定理．     

秦岭保护区群存在的主要问题和管理对策

本文作者根据秦岭保护区群内７个自然保护区（保护站）存在的主要问题,提出了解决问题的办法。主要问题：一、牛背梁自然保护区的形状、大小、边界区划不合理;二、各自然保护区由于投资和建立时间不同,发展不平衡。三、周边地区商业采伐严重;四、农业蚕食,非法利用自然资源现象得不到制止;五、交通道路穿越保护区,影响动物基因交流;六、旅游开发缺乏统一管理。采取的对策主要是：一、在主要动物活动地带建立联合管理区和生物走廊带;二、加强对老县城自然保护区的管理和投资;三、加强对穿越保护区公路沿线的管理;四、解决对资源的过度利用,开展社区共管工作;五、对旅游实行规范化管理;六、开展多种经营创收。     

薄层扫描法测定保元肠疡胶囊中人参皂苷Rg_1的含量

本文报道了用双波长薄层扫描法测定中成药制剂保元肠疡胶囊中微量人参皂苷Ｒｇ１的含量．方法稳定、检测灵敏度高,变异系数小于５％．可作为该成药制剂的质量控制标准．     

An 8 kb Nucleotide Sequence at the 3' Flanking Region of the sspC Gene (184{degrees}) on the Bacillus subtilis 168 Chromosome Containing an Intein and an Intron

As part of the Bacillus subtilis genome sequencing project,we determined the complete nucleotide sequence of an 8000-bpfragment downstream of the sspC gene (184°) of the B. subtilis168 chromosome. The sequence analysis shows that the sspC geneis located inside of the SPß region, which differsfrom the current genetic map of B. subtilis 168. This regioncontains 12 putative ORFs (yojQ through yojZ and sspC). A homologysearch for the deduced products of the ORFs shows signi.cantsimilarities to enzymes involved in deoxyribonucleotide metabolism:ribonucleotide reductase (Nrd) E, NrdF, thioredoxinand dUTPase.Interestingly, this DNA fragment includes two split genes, yojPcontaining conserved motifs of an intein and yojQ and yojS withan 808-bp intervening sequence for a putative intron structure.In addition, the yojR gene includes a putative new DNA replicationterminator.     

缺硼与低温对黄瓜幼苗—些生理反应的影响

营养液培养试验表明,缺硼明显降低黄瓜幼苗植株的生长量,植株叶片细胞质膜K 的渗漏增加,细胞结构受损。此外,叶片中蔗糖和还原糖都明显积累。缺硼的上述反应在低温胁迫（7－8℃,FX25－28℃为对照）时表现更为明显。试验结果表明硼对于细胞膜的完整性具有重要的作用;充分供硼可以减轻低温对细胞膜的伤害。     

Inorganic models of photosystem II of plant photosynthesis. Catalytic and photocatalytic oxidation of water with participation of manganese compounds

Manganese dioxide is shown to be the catalyst of oxygen evolution at the oxidation of water by the one-electron oxidant Ru(bpy)₃³⁺ in neutral and slightly acidic media. Catalytic activity of MnO₂ depends on the method of preparation, the most active samples being those consisting of the smallest particles, i.e., having the largest surface-to-volume ratio. Ru(bpy)₃³⁺ was found to be formed at the irradiation of Ru(bpy)₃²⁺ solutions by visible light (λ = 436 nm) in the presence of such acceptors as Ce(IV), Hg(II), and Mn(IV) pyrophosphate. Continuous O₂ evolution from water is observed when the system Mn(IV) pyrophosphate plus Ru(bpy)₃²⁺ plus MnO₂ is irradiated by visible light. The system is discussed in connection with the active center of photosystem II of plant photosynthesis.     

Two‐dimensional reference map for the basic proteome of the human dorsolateral prefrontal cortex (dlPFC) of the prefrontal lobe region of the brain

We describe a 2‐DE proteomic reference map containing 227 basic proteins in the dorsolateral prefrontal cortex region of the human brain. Proteins were separated in the first dimension on pH 6–11 IPG strips using paper‐bridge loading and on 12% SDS‐PAGE in the second dimension. Proteins were subsequently identified by MS and spectra were analyzed using an in‐house proteomics data analysis platform, Proline. The 2‐DE reference map is available via the UCD 2‐DE Proteome Database ( http://proteomics‐portal.ucd.ie:8082 ) and can also be accessed via the WORLD‐2DPAGE Portal ( http://www.expasy.ch/world‐2dpage/ ). The associated protein identification data have been submitted to the PRIDE database (accession numbers 10018–10033). Separation of proteins in the basic region resolves more membrane associated proteins relevant to the synaptic pathology central to many neurological disorders. The 2‐DE reference map will aid with further characterisation of neurological disorders such as bipolar and schizophrenia.     

Host range expansion by Rhopalomyia yomogicola (Diptera: Cecidomyiidae) from a native to an alien species of Artemisia (Asteraceae) in Japan

In 2001, subconical galls were found on the leaves of an alien Artemisia species (Asteraceae) in Ibusuki City, Kagoshima Prefecture, Japan. These galls were quite similar to those induced by Rhopalomyia yomogicola (Diptera: Cecidomyiidae) on Artemisia princeps, Artemisia montana, and Artemisia japonica in Japan. The morphological features of the pupal head and molecular sequencing data indicated that the gall midge from the alien Artemisia was identical to R. yomogicola. Usually, galling insects do not expand readily their host range to alien plants, but R. yomogicola is considered to have expanded its host range to the alien Artemisia by its multivoltine life history trait and oligophagous habit across two different botanical sections of the genus Artemisia. Adult abdominal tergites and sternites and immature stages of R. yomogicola are described for the first time and detailed biological information is presented.