2003年秋冬季西安大气中有机碳和元素碳的理化特征及其来源解析

IEECAS SKLLQG

陕西黄土高原土壤干层对植树造林的影响

IEECAS SKLLQG

含硝基腐植酸、DCD的氮肥增效剂对水稻生育性状及产量影响的试验研究

<正> 我国农业生产中的主要氮素化肥是尿素和碳酸氢铵。随着作物产量的提高,施用氮肥量也不断增加,但由于施入土壤中的尿素或碳酸氢铵分解速度快,有相当一部分氮素作物尚未吸收利用就流失或挥发而浪费掉。据测定,尿素中氮素利用率只有35％,碳酸氢铵氮素利用率仅15～25％。本试验结果表

科尔沁沙地流动沙丘土壤线虫群落组成与多样性研究

本文对科尔沁沙地流动沙丘不同坡位(丘间地、过渡带、迎风坡中部、坡顶、背风坡上部和下部)和不同土层深度(0～20、20～40和40～60cm)的土壤线虫群落组成与多样性进行了比较研究。研究结果表明,流动沙丘土壤线虫具有显著的坡位效应,而垂直分布特征不显著。丘间地和背风坡下部具有较高数量和较多种类的土壤线虫,而过渡带和迎风坡中部土壤线虫数量较低、种类也较少。不同坡位土壤线虫总数、食细菌线虫、食真菌线虫和植物寄生线虫数量存在显著差异。除食细菌线虫外,不同土层土壤线虫总数及其各营养类群均无显著差异。土壤含水量和电导率是影响土壤线虫群落空间分布格局的主要因素。土壤线虫群落分布格局的变化反映了流动沙丘土壤微环境的变化,对土壤质量具有一定的指示作用。

流动注射石英管原子吸收法测定微量总汞

建立了一套流动注射石英管原子吸收光谱法测定土壤、植物和药品等样品中微量Hg的方法,研究了酸度、载液和还原液流速及其浓度、氩气流量等条件对测定结果的影响.采用五氧化二钒、硝酸、硫酸进行消解,可获得可靠的分析结果.方法特征量为59 pg,检出限为0.028 μg/L;相对标准偏差为1.60%～3.86%;回收率为94%～102%.

Determination of mercury with a flow injection quartz tube atomic absorption spectrometry

A method was developed for the determination of micro mercury in the soil, plants and the traditional Chinese medicine using flow injection quartz tube-atomic absorption spectrometry. The effect of the factors such as acidity,. the carrier solution, the flow rate of reductive solution and argon gas, etc. on the determination was studied. When vanadic oxide, nitric acid and sulfuric acid were used to decompose the sample reliable result could be obtained. The characteristic mass of the method is 59 pg, the detection limit is 0.028 mug/L, RSD is < 3.9% and the recovery is in the range of 94% &SIM; 102%.

Permanent Genetic Resources added to Molecular Ecology Resources Database 1 May 2009-31 July 2009

This article documents the addition of 512 microsatellite marker loci and nine pairs of Single Nucleotide Polymorphism (SNP) sequencing primers to the Molecular Ecology Resources Database. Loci were developed for the following species: Alcippe morrisonia morrisonia, Bashania fangiana, Bashania fargesii, Chaetodon vagabundus, Colletes floralis, Coluber constrictor flaviventris, Coptotermes gestroi, Crotophaga major, Cyprinella lutrensis, Danaus plexippus, Fagus grandifolia, Falco tinnunculus, Fletcherimyia fletcheri, Hydrilla verticillata, Laterallus jamaicensis coturniculus, Leavenworthia alabamica, Marmosops incanus, Miichthys miiuy, Nasua nasua, Noturus exilis, Odontesthes bonariensis, Quadrula fragosa, Pinctada maxima, Pseudaletia separata, Pseudoperonospora cubensis, Podocarpus elatus, Portunus trituberculatus, Rhagoletis cerasi, Rhinella schneideri, Sarracenia alata, Skeletonema marinoi, Sminthurus viridis, Syngnathus abaster, Uroteuthis (Photololigo) chinensis, Verticillium dahliae, Wasmannia auropunctata, and Zygochlamys patagonica. These loci were cross-tested on the following species: Chaetodon baronessa, Falco columbarius, Falco eleonorae, Falco naumanni, Falco peregrinus, Falco subbuteo, Didelphis aurita, Gracilinanus microtarsus, Marmosops paulensis, Monodelphis Americana, Odontesthes hatcheri, Podocarpus grayi, Podocarpus lawrencei, Podocarpus smithii, Portunus pelagicus, Syngnathus acus, Syngnathus typhle,Uroteuthis (Photololigo) edulis, Uroteuthis (Photololigo) duvauceli and Verticillium albo-atrum. This article also documents the addition of nine sequencing primer pairs and sixteen allele specific primers or probes for Oncorhynchus mykiss and Oncorhynchus tshawytscha; these primers and assays were cross-tested in both species.

海藻中甜菜碱及其类似物的提取及甜菜碱含量的初步分析

本文首先根据甜菜碱及其类似物（季胺化合物）特殊的化学性质，选择了离子交换层析法对海藻中的季胺化合物进行了分离和提取。用德尔根多夫显色剂验证了海藻中德尔根多夫阳性化合物的存在，分离产物与雷氏盐形成沉淀证明了这些化合物季胺基团的存在。为了排除用离子交换层析法分离得到的样品溶液中其它化合物的干扰，本文采用了与季胺基团有高度化学反应特异性的雷氏盐将季胺化合物从样品溶液中特异沉淀出来，然后将沉淀转化为可溶性的硝酸盐溶液，用氢氧化钠标准溶液滴定而得到海藻中甜菜碱的总毫摩尔数。将滴定完的溶液和未滴定的溶液一起浓缩后经过离子交换层析并洗脱后使季胺化合物再生，再次用雷氏盐将其沉淀 出来并转化成溶液，用氢氧化钠标准溶液滴定出甜菜碱的总毫摩尔数，与第一次的结果比较，说明此方法是一种误差较小、重复性好、简便可取的方法。本研究共对七种典型的红藻、褐藻和绿藻的甜菜碱的总含量进行了测定，甜菜碱的灯似物也在分离行到的产物中，但它们的含量没有测,定结果表明，红藻和绿藻中菜碱的含量较高，浒苔中甜菜碱的干重百分比甚至能高达0．86％；褐藻中甜菜碱的含量相对要低一到两个数量级。本研究还隶属海藻化学研究室九五攻关课题一“海藻中的植物生长调节剂”的一部分，这些测定结果对海藻资源中甜菜碱及其类似物的开发和利用有很高的参考价值。本文还着重分析了海藻中甜菜碱及其类似物的功能，并对其潜在的应用前景进行了展望。该研究内容填补了国内的空白。

大黄植物的引种栽培方法

本发明涉及一种大黄植物的引种栽培方法，该方法包括种子处理技术、人工育苗技术和引种栽培技术；本发明通过对种子进行物理和化学处理方法，使高原野生植物种子的萌发率达90％以上；通过人工育苗途径，可根据种苗数量和季节需要，有效地提供优质种苗；通过在一定海拔的适宜旱耕地或适宜荒地直播和移栽的途径，可快速恢复高原野生植物的资源量，并有效地保证了高原野生植物的药材品质和药效成分。

贝尔凹陷苏德尔特构造带古潜山构造与储层研究

With the develop ment of oil and gas exploration, the conventional struc ture exploration era has gradually been substituted by the concealed reser voir exploration technology. Hill poll becomes one of the most important areas in the future exploration. This paper is based on the three-dimensional seismic interpretation of Sudeerte structure. In terms of the overall character istics of Sudeerte structure, we use the coherent cube and the time slice to interpret the fault in plane. For the interpretation，we especially used the well to adjust the interpretation results. The results of seismic attribution analysis, spectrum decomposition and post- stack seismic inversion forecast that hill pools reservoir are dist ributed in several bands along the north-northeast to northeast-east. Xing'anling Group shows that the potential reser voirs are mainly distributed along Bei 14 –Bei 40 and De (99-212) - Bei (16-1) and Budate Group distributed along Bei 14 –Bei 40 in northwestern direction and De (99-212) - Bei (16-1) in north eastern direction. At the same time, by analyzing the structure and the reservoir, and combining with other data, three models are built. The characteristics of reservoirs dist ribution are concl uded，and potent ional favorable exploration dire ctions are predi cted.

Effectiveness and safety of cryotherapy after arthroscopic anterior cruciate ligament reconstruction. A systematic review of the literature

Cryotherapy is widely used in rehabilitation; however, its effectiveness after anterior cruciate ligament (ACL) reconstruction remains uncertain. To investigate the effectiveness and safety of cryotherapy following ACL reconstruction through a systematic review, randomized and quasi-randomized clinical trials were searched in the databases: MEDLINE, EMBASE, CENTRAL PEDro, SportDiscus, CINAHL, LILACS (June 2013). the primary outcomes measures were pain, edema and adverse events; the secondary outcomes were knee function, analgesic medication use, range of motion, blood loss, hospital stay, quality of life and patient satisfaction. the methodological quality of studies was evaluated using the Cochrane Collaboration risk-of-bias tool. Ten trials (a total of 573 patients) were included. Results of meta-analysis showed that the use of cold compression devices produced a significant reduction in pain scores 48 h after surgery (p < 0.00001), compared to no cryotherapy. the risk for adverse events did not differ between patients receiving cryotherapy versus no treatment (p = 1.00). the limited evidence currently available is insufficient to draw definitive conclusions on the effectiveness of cryotherapy for other outcomes. There is a need for well designed, good quality randomized trials to answer other questions related to this intervention and increase the precision of future systematic reviews. (C) 2014 Elsevier B.V. All rights reserved.

Diversification efficiency and deposit rates

Rhodes, Mark, 'Diversification efficiency and deposit rates', Applied Financial Economics (2005) 15(13) pp.935-945 RAE2008

Building Responsive Systems from Physically-correct Specifications

Predictability - the ability to foretell that an implementation will not violate a set of specified reliability and timeliness requirements - is a crucial, highly desirable property of responsive embedded systems. This paper overviews a development methodology for responsive systems, which enhances predictability by eliminating potential hazards resulting from physically-unsound specifications. The backbone of our methodology is the Time-constrained Reactive Automaton (TRA) formalism, which adopts a fundamental notion of space and time that restricts expressiveness in a way that allows the specification of only reactive, spontaneous, and causal computation. Using the TRA model, unrealistic systems - possessing properties such as clairvoyance, caprice, in finite capacity, or perfect timing - cannot even be specified. We argue that this "ounce of prevention" at the specification level is likely to spare a lot of time and energy in the development cycle of responsive systems - not to mention the elimination of potential hazards that would have gone, otherwise, unnoticed. The TRA model is presented to system developers through the CLEOPATRA programming language. CLEOPATRA features a C-like imperative syntax for the description of computation, which makes it easier to incorporate in applications already using C. It is event-driven, and thus appropriate for embedded process control applications. It is object-oriented and compositional, thus advocating modularity and reusability. CLEOPATRA is semantically sound; its objects can be transformed, mechanically and unambiguously, into formal TRA automata for verification purposes, which can be pursued using model-checking or theorem proving techniques. Since 1989, an ancestor of CLEOPATRA has been in use as a specification and simulation language for embedded time-critical robotic processes.

Investigating the influence of the sulfur oxidation state on solid state conformation

Design, synthesis and structural characterization of a series of diphenylacetylene derivatives bearing organosulfur, amide and amine moieties has been achieved in which the molecular conformation is controlled through variation of the hydrogen bond properties on alteration of the oxidisation level of sulfur.