Carbazole-type compounds in crude oils

Carbazole-type compounds were analyzed using GC and GC-MS-MS. A relatively high concentration of carbazole-type compounds was detected in crude oils of different types (marine and non-marine) and different maturities (low mature and mature) in Tarinl. Liaohe and Keilu basins. The results suggest the ratios of 1, 8-dimethyl-/2, 7-dimethylcarbazole and benu, [a] carbazole/benzo [e] carbazole might be taken as petroleum migration parameters.     

The discovery of early Permian reef belt in east Kunlun and its significance

The early permian reef belt is distributed in the southern side of eastern Kunlun, north area of Qinghai-Tibet Plateau. The core-reef facies of thc reel extends from Tuosuo Lake to Huashixia. Lots of reef breccia was found at the southern slope of the mre-reef belt, and to the north of the reef belt there is back-reef limestone. Cacisponges, hydrozoa, bryozoa,Tabulozoa, Tubiphytes and red algae are the main frame-building organisms.Archaeolithoporella, laminated blue-green algaes,Tabulozoa andTubiphytes played a role of binding or encrustating. There are many kinds of epibiont in the mf, including brachiopod, gasterid, foraminifera, echinoderm and simple coral. The type and the characteristics of the reef-building organisms in eastern Kunlun and Animaqing are basically thr same as those in the south of Chi     

Signal transduction pathways mediated by colony stimulating factor-1 receptor

Colony-stimulating factor-1 (CSF-1), which is necessary for cell proliferation and differentiation, regulates both immediate and delayed early responses throughout G1 phase. The binding of CSF-1 to its receptor (CSF-1R) triggers phosphorylation of the receptor and its intrinsic tyrosine kinase. The activated receptor binds directly to cytoplasmic effector proteins, which induce multiple-signal transduction pathways. CSF-1 can induce the c-myc gene expression via Ras and Ets-related proteins. The expression of c-fos/jun family genes is also targeted following the activation of Ras. CSF-1R activates STAT1 and STAT3 to participate in signaling, but JAKs do not appear to contribute to signaling by CSF-1R. CSF-1R activates PI3-kinase, and PI3-ki can interact with downstream proteins by the MAPKK-related pathway independent of Ras/Raf. PC-PLC can enforce signaling in response to CSF-1. Furthermore, the turnover and dephosphorylation by the phosphatase SHPTP1 of CSF-1R are the major mechanism in the negative regulation of signaling by CSF-1R     

Relationship between giant magnetoresistance of NiFe/Cu multilayers and their microstructures

The (111)-orientated NiFe/Cu multilayers were prepared by magnetron sputtering method. At room temperature, saturation magnetoresistances of NiFe/CU multilayers oscillate as a function of Cu spacer layer thickness. Two peak GMR values of 19.4%, 11.6% and 11.2%, 1% appear, respectively, at Cu sublayer thickness of t_Cu,= 1.0, 2.2 nm while the deposition pressures are 0.25 and 0.45 Pa. X-ray small-angle reflections and diffuse scattering at Cu K-edge (8.979 keV) by synchrotron radiation source were used to characterize the interfacial roughness. Diffraction anomalous fine-structure scattering (DAFS) was performed to investigate the local structure of NiFe and Cu sublayers. Results show that the deposition pressure has effect on interfacial roughness of the samples obviously, and the interfacial roughness also affects the GMR values of the samples strongly.     

时变不确定非线性系统的鲁棒输出跟踪

该文研究了一为具有时变参数或扰动的非线性系统的鲁棒轨迹跟踪控制问题,假定系统的标称模型是可以反馈线性化的,通过递推构造壮环系统地的Ｌｙａｐｕｎｏｖ函数,给出了该类不确定系统鲁棒输出跟踪控制器设计方案。该控制器能保证闭环系统的状态是一致有界的,且通过对控制器参数的适当选择,可使闭环系统的输出跟踪达到指定的精度要求,最后由一机器人控制系统的仿真研究表明,该文提出了控制方案具有很强的鲁棒性,控制效果是令     

关于时滞Liénard型方程的周期解

本文研究具有时滞的Lienard型方程周期解的存在性,得到了一些新的结果。     

正蕴涵BCK-代数的伴随半群

本文讨论了正蕴涵BCK－代数的剩余刻划;证明了具有条件（S）的正蕴涵BCK－代数的伴随半群是一个下半格。     

Search for new antiphytovirucides

The lead compound of substituted 2-(4′-hydroxyphenyl)benzimidazoles were modified by phosphorylation sulfonation and carboxymethylation. The benzimidazoloamidophosphate (6) (7) have better activity against tobacco mosaic virus (TMV). The benzimidazolophenoxyacetic acid, phenoxysulfonic acid containing trifluoromethyl, and nitro group have 77%≈85% efficiency for wheat rust disease. Supported by the National Natural Science Foundation of China and National Laboratory of Elemento Organic Chemistry Nankai University Qu Fanqi: born in 1952, Associate professor     

北疆地区辣椒上烟草花叶病毒（TMV）各分离物的差异性研究

以ＴＭＶ－ｏｍ为对照,测定了辣椒上５个烟草花叶病毒分离物Ｐ－９、Ｐ－３８、Ｐ－４４、Ｐ－７１、ＴＭＶ－ｗｙｍ在４２个辣椒品种、品系上的致病反应,结果表明这５个分离物对辣椒的致病性存在明显差异：Ｐ－７１、ＴＭＶ－ｗｙｍ＞Ｐ－９＞Ｐ－３８、Ｐ－４４;对接种过５个ＴＭＶ分离物的辣椒（四平头）进行过氧化物酶（ＰＯＤ）和酯酶（ＥＳＴ）同工酶分析,结果表明辣椒上５个ＴＭＶ分离物引起的酶活性有差异：导致ＰＯＤ上活性强弱为ＴＭＶ－ｗｙｍ＞Ｐ－９、Ｐ－３８＞Ｐ－４４、Ｐ－７１;引起ＥＳＴ活性强弱为Ｐ－３８＞ＴＭＶ－ｗｙｍ、Ｐ－４４＞Ｐ－７１＞Ｐ－９。说明北疆地区辣椒上ＴＭＶ存在着分化。     

炸药破碎岩石能量利用率的研究

以爆炸动力学理论和岩石断裂理论为基础,分析了岩石破中的能量平衡问题,并给出了炸药破碎岩石能量利用率的计算方法。理论分析表明,平均爆破块度随岩石的单位表面能的增加而增加;计算结果表明,炸药破碎岩石能量利用率仅占炸药总能量的百分之十左右。