西藏林周卡孜水库黑颈鹤夜宿特性研究

2011年1月3日～2月26日,对西藏拉萨市林周县卡孜水库越冬黑颈鹤的夜宿地采用GPS定位进行观察,经统计分析,结果表明,在林周县卡孜水库黑颈鹤越冬地总共确定黑颈鹤的夜宿地11个,大约有948只夜宿的黑颈鹤,占该地段白天觅食黑颈鹤数量的59％,其中数量超过40只的夜宿地共有6个.黑颈鹤在卡孜水库附近一般选择临水浅滩、视野开阔的暖河、避风点的湿地过夜,有些黑颈鹤还选择在辫状小河道的沙丘过夜.黑颈鹤飞离夜宿地的时间集中在上午9:00～10:00,主要飞往觅食地,飞回夜宿地的时间集中在19:30左右;主要与斑头雁共用夜宿地.随着时间和气温的变化,选择性地改变夜宿地,但变化不大.研究结果为保护黑颈鹤提供依据.     

兽药网站信息安全等级保护实践与思考

就如何利用中国兽药信息网站已有的软硬件条件,按照国家信息安全等级保护的标准要求网站系统进行分析评估、提出规划设计,成功地实施改造和通过了信息安全三级等级保护评测,其实践和策略为有关信息系统的安全改造提供了有益的借鉴。     

Masitinib demonstrates anti-proliferative and pro-apoptotic activity in primary and metastatic feline injection-site sarcoma cells

Dysregulation of platelet-derived growth factor receptor (PDGFR) may play a role in feline injection-site sarcoma (ISS) cell growth and viability. Masitinib, a tyrosine kinase inhibitor approved for treatment of canine mast cell tumours, is highly selective for the PDGFR signalling pathway and may offer a new therapeutic approach for this disease. The in vitro effects of masitinib on growth, apoptosis and PDGFR signalling in two novel ISS cell lines were investigated. PDGFR expression was confirmed by Western blot in cell lines derived from a primary ISS tumour (JB) and a corresponding, histologically confirmed ISS lung metastasis (JBLM). Masitinib inhibited cell growth and PDGFR phosphorylation in both cell lines. Higher drug concentrations were required to inhibit growth than to modulate ligand-induced autophosphorylation of PDGFR. These in vitro data suggest that masitinib displays activity against both primary and metastatic ISS cell line and may aid in the clinical management of ISS.     

辽西地区华北落叶松造林立地条件选择的研究

通过对不同立地类型上营造的华北落叶松成活率生长情况调查研究,结果表明:不同的海拔高度、坡向和土层厚度对华北落叶松的生长有较大影响,选择海拔在800 m以上,基岩母质以微酸性的花岗岩、片麻岩、基性岩,坡向以北坡等立地营造华北落叶松,将有较大的成活率和保存率,林木生长量大。     

南带产区不同立地类型间的杉木木材解剖

为了解不同立地类型杉木木材解剖上的差异,为杉木速生材的定向培育及材质改良提供更为充分的理论依据,该文采用宏观、微观的方法,以广西国营高峰林场12～13年生的杉木木材为试材,于2001—2003年研究了南带产区不同立地类型(南坡、山谷、山脊、山顶)间杉木木材解剖上的差异. 结果表明:①生长轮宽度及晚材率差异显著. 生长轮宽度径向变异随着年龄的增加呈先增加后减小的趋势,纵向变异随着高度的增加呈先增大后减小的趋势. 而晚材率的径向、纵向变异规律均不明显. ②管胞双壁厚及壁腔比差异显著,而长度、宽度、长宽比差异不显著. 各解剖因子径向变异模式相似,而纵向变异规律较为复杂.③微纤丝角差异不显著. 径向变异均为随着年龄的增加而减小,纵向变异呈“大—小—大”的模式. ④组织比量差异不显著. ⑤气干密度差异显著.      

Biodegradation of aged residues of atrazine and alachlor in a mix-load site soil

A selected microbial consortium (SMC) capable of degrading two specific herbicides, alachlor (2-chloro-2′,6′-diethyl-N-[methoxymethyl]-acetanilide; AL) and atrazine (2-chloro-4-ethylamino-6-isopropylamino-S-triazine; AT) was isolated from a pesticide-contaminated mix-load site soil. Evaluation of bioaugmentation as a feasible bioremediation strategy for this mix-load site soil (Site 5A) was initiated in standard laboratory biometer flasks utilizing the isolated SMC. The biometer flasks were monitored for CO₂ evolution and pesticide degradation. The total amount of CO₂ evolved from the treated biometer flasks was significantly different from the control flasks. The rate of CO₂ evolution was 2.6 times faster in the treated soil (0.0123 mM CO₂ d⁻¹ vs. 0.0048 mM CO₂ d⁻¹). The total net CO₂ produced in the treated biometer flasks was 0.9481 mM, representing mineralization of approximately 10% of the AT and AL initially present. Forty-eight percent of AT and 70% of AL was degraded in the inoculated biometer flasks. The first-order rate constants were 0.0064 d⁻¹ and 0.1331 d⁻¹ for AT and AL, respectively. The calculated half-life of AT was 108 d while a 50% decrease in AL occurred by Day 5. In just 2 d, 20% of the AT was degraded while only 10% of the AL disappeared. The initial fast degradation rate of AT was followed by a much slower, more gradual degradation rate period that lasted about 35 d. Alternatively, the rate of AL degradation increased after the second day resulting in 60% of the AL being transformed by the end of the first week. Alachlor degradation appeared to be dependent upon AT degradation especially during the first several days of the incubation period. Complete disappearance of the herbicides over the study time was not achieved.     

垃圾填埋场空气微生物浓度的时空分布特征

为了了解垃圾填埋场空气微生物浓度的时空分布及变动规律,在北京市某垃圾卫生填埋场填埋区、渗滤液处理区、生活区分别选定监测点,利用安德森六级微生物采样器,对填埋场空气微生物进行了系统的定点取样和分析。结果表明,垃圾填埋场空气微生物浓度分布填埋区〉渗滤液处理区〉生活区。填埋区空气微生物浓度达到6 000 CFU·m^-3以上,生活区约为3 500 CFU·m^-3,填埋区空气微生物浓度显著高于生活区（P〈0.05）。填埋区不同时段空气微生物浓度不相同,呈4—7月份9：00—11：00浓度低于15：00—16：00,而8、9月份以后9：00—11：00浓度高于15：00—16：00的趋势,但没有统计学差异（P〉0.05）。2006年4月—2007年1月空气微生物总浓度变化曲线呈双峰型,两个高峰分别出现在5月和9—11月。填埋场环境温度对空气微生物浓度的影响大于湿度。     

浅谈坡地径流场的规划与设计——以北京市为例

坡地径流场是水土流失监测网络中的重要组成部分.坡地径流场规划设计的关键是目的明确,监测技术路线清晰,管理方便易行.以北京市坡地径流场的规划和建设为例,从规划目的、原则及径流小区的配置等方面,对坡地径流场的规划设计进行了探讨.     

尾巨桉中大径材立地指数编制及施肥对立地指数的影响

本文采用了连续12次16年生标准地的观测数据,以模型H=a+b/(c+A)作为导向曲线,标准年龄为7 a,编制了尾巨桉中大径材立地指数表.经过x2? 检验和标准差检验综合得出,所编制的立地指数合理,科学可行.本研究提出培育桉树中径材的立地指数不应小于20,培育桉树大径材的立地指数不应低于24.施肥提高了林地的立地指数,施肥量越多,立地指数提高的幅度越大;这种提高幅度在施肥量少的时候较大,当施肥量逐步增大的时候,立地指数的提高幅度逐渐变小.     

上海场地土壤环境调查现状及建议

在综合分析发达国家场地土壤环境调查的基础上,结合上海市的土壤环境调查现状,提出相关调查建议,包括由上海政府成立专门的政府基金负责场地土壤环境调查,从企业停产后接管后续的土地拆迁、平整、场地调查、土壤修复等过程;重新梳理土地复垦流程,增加复垦前后的场地土壤环境调查;简化初步调查取样过程;建立上海场地污染数据库,对场地土壤环境进行质量分级。