Theoretical calculation of photoionization cross sections of B-like ions: N2+, O3+ and F4+

There can be found some notable discrepancies with regard to the resonance structures when R-matrix calculations from the Opacity Project and other sources are compared with recent absolute experimental measurements of Bizau et al [Astron. Astrophts. 439 387 (2005)] for B-like ions N2+, O3+ and F4+. We performed close-coupling calculations based on the R-matrix formalism for the photoionizations of ions mentioned above both for the ground states and first excited states in the near threshold regions. The present results are compared with experimental ones given by Bizau et al and earlier theoretical ones. Excellent agreement is obtained between our theoretical results and the experimental photoionization cross sections. The present calculations show a significant improvement over the previous theoretical results.

High-efficiency transfer and expression of AdCMV-p53 in human hepatocellular carcinoma cells induced by low-dose carbon-ion radiation

Objective To investigate whether the irradiation with C-beam could enhance adenovirus-mediated transfer and expression of p53 in human hepatocellular carcinoma. Materials and methods HepG2 cells were exposed to C-beam or gamma-ray and then infected with replicationdeficient adenovirus recombinant vectors containing human wild-type p53 or green fluorescent protein, respectively. The transfer efficiency and expression level of the exogenous gene were detected by flow cytometric analysis. Cell survival fraction was detected by clonogenic assay. Results The transfer frequency in C-beam or gamma-irradiated groups increased by 50-83% and 5.7-38.0% compared with the control, respectively (P < 0.05). Compared with C-beam alone, p53 alone, and gamma-ray with p53, the percentages of p53 positive cells for 1 Gy C-beam with p53 increased by 56.0-72.0%, 63.5-82.0%, and 31.3-72.5% on first and third day after the treatments, respectively (P < 0.05). The survival fractions for the 2Gy C-bearn and AdCMV-p53 infection groups decreased to similar to 2%. Conclusion C-beam irradiation could significantly promote AdCMV-green fluorescent protein transfer and expression of p53.

脲酶/硝化抑制剂对土壤有效态氮、微生物量氮和小麦氮吸收的影响

研究了脲酶抑制剂 (NBPT)、硝化抑制剂 (DCD)及二者组合在草甸棕壤上施用对尿素态N转化及土壤总有效态N、微生物量N的影响 .结果表明 ,尿素配施NBPT、DCD及抑制剂组合能够增加尿素水解后土壤NH+ 4 含量 2 %～ 5 3% ,显著降低了氧化态N的浓度 ,抑制了土壤中铵态N的氧化 ,增加土壤总有效N 34%～ 4 4 % ,小麦吸N量增加 0 2 6 %～ 6 79% ,其中以脲酶抑制剂与硝化抑制剂组合的效果最明显 .抑制剂施用增加了微生物在小麦生长初期对有效态N固持 ,有利于后期土壤有效态N的矿化 .

像元尺度上不确定性对空间景观直观模型模拟的影响

L ANDIS模型是模拟自然和人为干扰下森林景观变化的空间直观景观模型。模型把景观概念化为由相同大小的像元或样地组成的格网。在每一个像元上 ,模型要求输入物种和年龄组信息。但是 ,由于研究区一般由成千上百万个像元构成 ,不可能通过实际调查获取每一个像元上的物种和年龄组信息。因此 ,采用了一种基于小班的随机赋值法从森林调查数据中获取每一个像元的物种和年龄组信息。该方法是一种基于概率的方法 ,会在 L ANDIS模型模拟的物种和年龄组信息的输入中引入不确定性。为了评价由基于小班的随机赋值法所引入像元尺度上的不确定性对模型模拟结果的影响 ,用蒙特卡罗模拟法进行不确定性分析。对 L ANDIS模型模拟的每一个物种 ,用众数年龄组发生频率来定量化单个像元上年龄组信息的不确定性 ,用所有像元上的众数年龄组平均发生频率来定量化年龄组信息在像元尺度上总的不确定性。平均发生频率越高 ,不确定性越低。为了评价基于小班的随机赋值法对景观尺度上模型模拟结果的影响 ,计算了每一个物种在整个研究区内的面积百分比和聚集度指数。变异系数越大 ,不确定性越高。对所有物种 ,年龄组信息不确定性在模型模拟的初期是比较低的 (平均发生频率大于 10 )。种子传播、建群、死亡和火干扰使模型结果的不确定

规范化管理高科技高效益企业

规范化管理高科技高效益企业中国科学院成都生物研究所王海燕中共成都市委组织部张松中科院成都生物研究所于１９８８年开始创办药厂，药厂产值六年翻了六番，原始投资增值数百倍。如今，药厂已更名为地奥制药公司，成为拥有净资产２亿多元、年利税１亿元的集高科技、新产...

中国及相关海域褐虾总科系统分类学和动物地理学研究

褐虾总科包括褐虾科和镰虾科，是重要的底栖生物类群，而且很多褐虾种为常见的经济种，其中中国北方海域最常见的为日本褐虾Crangon hakodatei Rathbun, 1902，另外黄海褐虾Crangon uritai Kim & Hayashi, 1999在黄渤海也较为常见。在东海和南海，污泥疣褐虾Pontocaris pennata (Bate, 1888)和拉氏爱琴虾Aegaeon lacazei (Gourret, 1887)在底栖生物拖网时常可采到，有很大的经济价值。我国对褐虾总科的研究很少，亟需对我国海域的褐虾进行全面的系统分类学和地理分布研究。 本论文所依据的标本主要为中国科学院海洋研究所海洋生物标本馆馆藏的约1600号褐虾类标本，标本主要采自渤海、黄海、东海、南海四大海域，也有部分标本采自日本海、南极和北极等海域，并得到国外同行专家惠赠的褐虾类标本约100号，同时也检查了其它单位保藏的少量标本。 本论文主要采用传统的形态学方法进行分类学研究，共鉴定出褐虾科14属25种，其中1个新种，6个新记录种，镰虾科1属7种，其中2个新种，3个新记录种。参照历史文献与现在研究结果，中国海域的褐虾类至少有2科11属44种。 本文通过对约1700号标本的详细检查，总结了各个属和种的分类学特征和地理分布特点，对各属的分种均附有详细系统的检索表，对鉴定的32种褐虾均附有详细的背面整体图和侧面整体图以及附肢等的局部形态图，并对各种进行了中文名称的考订。 本研究是我国首次关于褐虾总科的系统分类学和动物地理学研究，研究结果将改变我国在褐虾总科研究报道方面的薄弱现状，并为此动物类群的多样性等研究提供重要的基础资料。研究结果澄清了分类学上存在争议的疑难种，发现了3个新种，报道了9个新记录种，阐明了我国褐虾总科的区系特点。

济阳坳陷陡坡带砂砾岩体发育特征及油气成藏规律研究

Jiyang depression is one of the most important petroleum production basins in China. The petroleum pools, found easier, have been densely explored and developed. At present, the subtle traps are becoming the main exploring aims. A lot of Tertiary sand-conglomerate body petroleum pools, as one of the important subtle pools, have been discovered recently. It is necessary and urgent to study deeply the developing characteristics and petroleum pool distribution of Tertiary sand-conglomerate bodies in Jiyang Depression. The present dissertation has concluded the main developing characteristics of the Tertiary sand-conglomerate bodies in Jiyang Depression, and studied the sand-conglomerate bodies in Chengnan Fault Zone in detail. Depending on the synthesized studies of geology, geophysics and logging data, the following conclusions have been arrived at. Four criterion layers in Member 3 of Shahejie Formation, according to the depositional cycle analyses, have been established for the subdivision of different layers of sand-conglomerate bodies and the correlation of different sand-conglomerate bodies. It indicated that the alluvial delta, delta-fan, alluvial fan, shallow water fan , deep water turbidite , fan-front turbidite are the six kinds of sand-conglomerate bodies, which have been distinguished in Jiyang Depression with the study of genetic types, characteristics and distribution of sand-conglomerate bodies. The shallow water fan, steep slope deep water turbidite and fan-front turbidite were the main types of sand-conglomerate bodies developed in Chengnan steep slope. Their identification and distribution have been described in detail. The development and distribution of sand-conglomerate bodies were resulted by fault depressing, palco-climate change and channel or trough on the uplift. The fault depressing is the most important-factor to the episodic developing of sand-conglomerate bodies. An episodic developing genetic mode has been established by the contrast analyses between episodic fault depressing and climate change cycles. The hydrocarbon accumulation in the sand-conglomerate bodies in the steep slope was correlated with fan types, depositional phases, fault depressing and diagenesis. Sand-conglomerate wedge out (include up-oblique and onlap), lithological wedge out, mud screen (for anticline), fault plugging (by mud opposite sand, mud daubing) are the 5 possible mechanisms of oil accumulation. Lithological pool, stratigraphic pool and tectonic pool and lithologic-tectonic complex pool, and 9 subtypes of petroleum pools have been detected. It is easy for different pools to be combined as a complex reservoir, which was distributed along the syn-depositional fault slopes. The sand-conglomerate bodies in deep sag were usually evaluated as pore zone for hydrocarbon accumulation before. In fact, they are potential. Because of fan-front turbidite sands were especially developed in these zones, the sands have a close connection with the oil mud, and lithological pools can be expected to find in these zones. Chengnan fault slope was main channel of oil migration, and mud screen is the principle key for the oil accumulation in the sand-conglomerate bodies. If there was no mud between the sand-conglomerate bodies or on the top of sand-conglomerate bodies, the sand-conglomerate bodies would connect each other and there would be no dense material to hold up the oil migration along the slope. As the sand-conglomerate bodies could not been taken as a screen, the mud screen is the key for developing pool in this slope. According to this principle, about 6 potential traps, such as C915 block, C913 block, C916 block, south of Y109 well block, Y104 block and Y153 block, were selected for exploration and development.

East of the barrier; or, Sidelights on the Manchuria mission, by the Rev. J. Miller Graham.

http://www.archive.org/details/eastofthebarrier00grahuoft

Two thousand years of missions before Carey, based upon and embodying many of the earliest extant accounts.

http://www.archive.org/details/twothousandyears014145mbp

A retrospect / by J. Hudson Taylor.

http://www.archive.org/details/aretrospect00tayluoft

Dawn on the hills of T'ang, or, Missions in China / by Harlan P. Beach.

http://www.archive.org/details/dawnonthehillsof008853mbp