对甲苯磺酰谷氨酸桥联的一维双链锰配合物的合成、表征与晶体结构

A one-dimensional double-chain coordination polymer [Mn(phen)(tsgluo)] was synthesized in a mixed solution and its crystal structure was determined by X-ray diffraction method. It crystallizes in orthorhombic system with space group P2₁2₁2₁. The crystal data are: a=0.530 78(17) nm, b=1.723 9(5) nm, c=2.456 9(8) nm, Z=4, μ=0.729 mm^-1, D_c=1.579 g·cm^-3, V=2.248 1(12) nm³, R₁=0.033 1, ωR₂=0.078 9. In the title complex, each Mn(Ⅱ) ion presents a octahedral geometry with the coordination of two nitrogen atoms from 1,10-phenanthroline and four oxygen atoms from three different tsgluo^2- ligands. The γ-carboxyl coordinates to Mn(Ⅱ) in the mode of bidentate chelate, while the α-carboxyl coordinates in a bidentate bridging mode. CCDC: 253910.     

Hadron formation in semi-inclusive deep inelastic lepton-nucleus scattering

Hadron production in lepton-nucleus deep inelastic scattering is studied in a model including quark energy loss and nuclear absorption. The leading-order computations for hadron multiplicity ratios are presented and compared with the selected HERMES experimental data with the quark hadronization occurring inside the nucleus by means of the hadron formation time. It is shown that with increase of the energy fraction carried by the hadron, the nuclear suppression on hadron multiplicity ratio from nuclear absorption gets bigger. It is found that when hadronization occurs inside the nucleus, the nuclear absorption is the dominant mechanism causing a reduction of the hadron yield. The atomic mass dependence of hadron attenuation for quark hadronization starting inside the nucleus is confirmed theoretically and experimentally to be proportional to A^1/3.     

“药物化学”与“药理学”课程整合教学的探索

分析了"药物化学"与"药理学"2门课程整合教学的基础,从师资队伍、教学大纲、理论教学内容、实验教学内容和试题库建设等方面具体阐述了课程整合教学改革的实施方案,并对药学本科课程整合进行了总结思考与展望,为药学人才培养探索了新的模式和方向。     

Drell-Yan nuclear modification due to nuclear effects of nPDFs and initial-state parton energy loss

By globally analyzing nuclear Drell-Yan data including all incident energies,the nuclear effects of nuclear parton distribution functions(nPDFs)and initial-state parton energy loss are investigated.Based on the Landau-Pomeranchuk-Migdal(LPM)regime,the calculations are carried out by means of analytic parametrizations of quenching weights derived from the Baier-Dokshitzer-Mueller-Peigné-Schiff(BDMPS)formalism and using the new EPPS16 nPDFs.It is found that the results are in good agreement with the data and the role of the energy loss effect in the suppression of Drell-Yan ratios is prominent,especially for low-mass Drell-Yan measurements.Thenuclear effects of nPDFs become more obvious with increasing nuclear mass number A,the same as the energy loss effect.By a global fit,the transport coefficient extracted is q=0.26±0.04 GeV²/fm.In addition,to avoid diminishing the QCD NLO correction to the data form of Drell-Yan ratios,separate calculations of the Compton differentialcross section ratios RFe(W)/C(xF)at 120 GeV are performed,which provides a feasible way to better distinguish the gluon energy loss in Compton scattering.It is found that the role of the initial-state gluon energy loss in the suppression of Compton scattering ratios is not very important and disappears with the increase of xF.     

含异烟酸和2,6-二羧酸吡啶的双核铜(Ⅱ)配合物合成和晶体结构

用水热法合成了含2,6-二羧酸吡啶和异烟酸的双核铜(Ⅱ)配合物[Cu2(pydca)2(Hinic)2- (H2O)2]3H2O (H2pydca = 2,6-二羧酸吡啶, Hinic = 异烟酸), 并通过X射线单晶衍射测定其结构。晶体属三斜晶系, Pi空间群, 晶胞参数:a = 0.72375(10), b = 1.22205(17), c = 1.7078(2) nm, a = 90.463(2), b = 91.830(2), g = 93.563(2), V = 1.5067(4) nm3, Dc = 1.749 g/cm3, (C26H26Cu2N4O17) (Mr = 793.59), Z = 2, F(000) = 808, m = 1.501 mm-1, R = 0.0259, wR = 0.0741。配合物中1个铜(Ⅱ)离子配位数为5, 配位多面体为畸变的四方锥构型;另一个铜(Ⅱ)离子配位数为6, 配位多面体为畸变的八面体构型。配合物分子之间通过氢键连接, 形成三维网状结构。     

精准出铝控制无线调试系统设计与实现

精准出铝作业控制系统中控制器控制参数的现场调试是一项复杂耗时的工作,需要根据现场的情况反复修改控制参数以达到精准控制的效果;为了简化调试过程,缩短调试周期,针对控制系统使用的S7-200PLC控制器,基于无线通信技术和Moudbus通信协议,设计了一种无线调试系统,通过对称重上下限、出铝计重偏离判断、关风上下限、异常关风补偿量等PLC参数进行动态调整,实现了对系统控制部分的调试及维护;实际现场测试,结果表明该调试系统具有良好的可靠性和实用性,在保证出铝的精准控制的同时有效降低了系统功耗。     

吹扫捕集-气相色谱-质谱法同时测定土壤中27种挥发性有机物

应用吹扫捕集-气相色谱-质谱法测定土壤中27种挥发性有机物的含量。选定在25℃条件下吹扫捕集11min,取样品溶液5mL于吹扫瓶中,利用Tekmar Stratum吹扫捕集器直接进样,经TR-5MS毛细管色谱柱分离,电子轰击电离(EI)全扫描和选择离子扫描检测,内标法进行定量测定。27种挥发性有机物的质量浓度与其峰面积在一定的浓度范围内呈线性关系,方法检出限(3S/N)在0.077～0.69μg·kg~(-1)之间。样品加标平均回收率在86.5%～117.5%之间,相对标准偏差(n=7)在1.6%～8.2%之间。     

关于光电效应法测量金属材料逸出功的实验研究

利用光电效应法测量金属材料的逸出功,完全借助ZKY-GD-4智能光电效应实验仪来完成,改进了传统的材料逸出功的测量方法,计算机对数据自动采集、存储、实时显示采集数据,从而可以快速准确得出材料的逸出功.     

低剂量铅对大鼠脑组织一氧化氮合酶表达及活性的影响

为探讨低水平铅损伤记忆功能的作用机理，采用ＮＡＤＰＨ－黄递酶组织化学方法和＾３Ｈ－瓜氨酸生成生物检测技术，观察了新生大鼠在４００ｍｇ／Ｌ醋酸铅染毒４０天后对脑组织内一氧化氮合酶表达及活性的影响。结果显示大脑皮质一氧化氮合酶阳性神经元数量明显减少（Ｐ〈０．０５），在海马区脑组织内一氧化氮合酶活性降低５４．４％。结论：低水平铅暴露后可抑制大鼠脑组织内一氧化氮合酶的表达及活性。