超高效液相色谱-串联质谱法测定鸡肉和鸡蛋中5种硝基咪唑类药物残留量

目的 采用超高效液相色谱-串联质谱法(UPLC-MS/MS),建立鸡肉和鸡蛋中5种硝基咪唑类药物的检测方法。方法 样品经乙腈提取后,加入无水Na₂SO₄和NaCl,离心后上清液通过PRiME HLB固相萃取小柱净化,滤出液和乙腈洗脱液经氮吹至近干,10%甲醇水(v/v)溶液定容。以0.1%甲酸水-甲醇为流动相,被测物经BEH C18柱(2.1 mm×100 mm,1.7μm)分离、正离子多反应监测模式检测,内标法定量。结果 5种硝基咪唑在0.2～20.0 ng/ml范围内相关系数均大于0.999,方法检出限为0.05～0.10μg/kg,定量限为0.15～0.30μg/kg。在3个加标水平下(0.25、2.0和10.0μg/kg),鸡肉和鸡蛋的平均回收率分别为97.9%～106.0%和97.8%～110.0%,相对标准偏差(RSD)分别为0.9%～6.4%和1.0%～4.7%。结论 该方法简便、灵敏、准确,适用于鸡肉和鸡蛋中5种硝基咪唑残留量的快速检测。     

快速蛋白液相色谱系统纯化肺癌组织热休克蛋白70及其鉴定

目的:从肺癌组织中纯化并鉴定热休克蛋白70(HSP70),为研究其免疫原性和作为肿瘤疫苗奠定基础.方法:用组织蛋白裂解液从肺癌组织中提取总蛋白,应用ConA-sepharose亲和层析和快速蛋白液相色谱系统(FRLC)连续分离、梯度洗脱获得蛋白,应用十二烷基硫酸钠-聚丙烯酰胺凝胶电泳及Western-blot进行蛋白相对分子质量及免疫原性鉴定.结果与结论:所获蛋白的相对分子质量为70 000,经Western-blot鉴定为HSP70.     

局部伤口换药后加氧气吹干对伤口愈合效果的影响研究

目的 观察在局部伤口换药后加氧气吹干对伤口愈合的效果.方法 以我院2018年1月—2019年1月期间收治的60例局部伤口患者为研究对象,根据项目研究需求并结合患者及其家属意愿,将其分为观察组和对照组,每组各30例.对照组进行常规抗感染服用和涂抹、换药、护架烤灯照射局部,观察组在常规治疗的基础上在换药后加氧气吹干,对两组...     

Photoaligned Liquid Crystal Devices with Switchable Hexagonal Diffraction Patterns

Highly efficient optical diffraction can be realized with the help of micrometer-thin liquid crystal (LC) layers with a periodic modulation of the director orientation. Electrical tunability is easily accessible due to the strong stimuli-responsiveness in the LC phase. By using well-designed photoalignment patterns at the surfaces, we experimentally stabilize two dimensional periodic LC configurations with switchable hexagonal diffraction patterns. The alignment direction follows a one-dimensional periodic rotation at both substrates, but with a 60° or 120° rotation between both grating vectors. The resulting LC configuration is studied with the help of polarizing optical microscopy images and the diffraction properties are measured as a function of the voltage. The intricate bulk director configuration is revealed with the help of finite element Q-tensor simulations. Twist conflicts induced by the surface anchoring are resolved by introducing regions with an out-of-plane tilt in the bulk. This avoids the need for singular disclinations in the structures and gives rise to voltage induced tuning without hysteretic behavior.     

痔瘘熏洗剂治疗火毒炽盛型低位肛周脓肿术后创面临床观察

目的观察痔瘘熏洗剂熏洗治疗火毒炽盛型低位肛周脓肿切开引流术后创面的临床疗效。方法将40例患者按1∶1原则随机分为治疗组和对照组,治疗组20例采用痔瘘熏洗剂熏洗治疗,对照组20例用皮肤康洗剂熏洗治疗。3周后评价疗效。结果治疗组在减少创面渗液、加快腐肉脱落、促进创面愈合方面明显优于治疗组（P〈0.05,或P〈0.01）。结论痔瘘熏洗剂熏洗治疗火毒炽盛型低位肛周脓肿术后创面的临床疗效确切。     

高效液相色谱法测定毛支清口服液中黄芩苷含量

目的建立毛支清口服液中黄芩苷含量的测定方法。方法选用Venusil MP C18分析柱（4.6 mm×250 mm,5μm）,甲醇-水-磷酸（60∶40∶0.2）为流动相,检测波长为280 nm,流速为1.0 ml/min。结果黄芩苷进样量为0.5~3.0μg时与峰面积具有良好的线性关系,回归方程为：Y=3.00×106X-415 373,r=0.999 6,平均回收率为103.0%,相对标准偏差为1.117%。结论所建立的高效液相色谱方法简便、准确、灵敏度高、分离效果好,可作为毛支清口服液的质量控制标准。     

反相高效液相色谱法测定冬虫夏草等6味动物药中尿嘧啶含量

目的：采用反相高效液相色谱法（reverse phase—high performance liquid chromatography,RPHPLC）测定冬虫夏草、蛤蚧、土鳖虫、蜈蚣、中华蟾蜍、蜚蠊药材中尿嘧啶的含量。方法：色谱柱为Shim—pack CLC—ODS C18柱;流动相：0．05mol／L磷酸氢二铵溶液（pH8．4）;流速：0．6ml／min;检测波长：254nm。结果：尿嘧啶对照品浓度为2．49～49．80μg／ml时与峰面积呈良好的线性关系;回归方程：A=145874 c-45893,r=0．9999（n=7）。精密度试验RSD=0．08％,样品加样回收率为99．79％,RSD=1．93％（n=5）。结论：本法操作简单、准确、重现性好,为冬虫夏草、蛤蚧、土鳖虫、蜈蚣、中华蟾蜍、蜚蠊的鉴定和质量控制提供了依据。     

Preparation and Adsorption Properties of MCM-41 with Novel Gemini Ionic Liquid Surfactants as Template

A mesoporous molecular sieve was prepared by the hydrothermal synthesis method with symmetric Gemini surfactant 1,3-bis(hexadecyldimethylammonio)-propane dibromide, symmetric Gemini ionic liquid surfactant 1,3-bis(3-hexadecylimidazolium-1-yl) propane dibromide and self-designed asymmetric Gemini ionic liquid surfactant 1-(3-(hexadecyldimethylammonio)prop-1-yl)-3-hexadecylimidazolium dibromide as the template agent. The structure characterization results for mesoporous molecular sieves show that the material possesses a hexagonal pore structure with uniform channels. The mesoporous silica that was synthesized with self-designed asymmetric Gemini ionic liquid surfactant as the template agent possesses the largest surface area and its pore size and specific surface area are, respectively, 3.28 nm and 879.37 m²/g. The adsorption properties of the prepared MCM-41 for crystal violet were investigated, and the adsorption thermodynamics and kinetics were investigated. The results show that adsorption equilibrium can be reached under pH = 9 and 35 °C for 50 min, and the quantity of adsorption can reach up to 464.21 mg/g. The adsorption process belongs to Langmuir isothermal adsorption, conforming to second-order adsorption kinetics, and the adsorption process is an endothermic process.     

Generation of A Space-Variant Vector Beam with Catenary-Shaped Polarization States

We demonstrate the generation of a space-variant vector beam with catenary-shaped polarization states based on the polarization interferometry. With a spatial light modulator and a common path interferometric configuration, two orthogonally circularly polarized beams with different phase modulation overlap each other, yielding the vector beams. In addition, the polarization states of this vector beam are scalable to the arbitrary spatial distribution because of its great flexibility and universal applicability. It is expected that this vector beam may have many potential and intriguing applications in the micro/nano material processing, liquid crystal elements fabrication and optical micro-manipulation, and so on.