检索结果-南通市图书馆

Chinese Journal of Structural Chemistry 2015年第7期34卷 1013-1018页

作者： mURTAZA madni shahid hameed m.ham.ad naeem Ahmed KHAWAJA Ansar Yasin m.ham.ad Nawaz Tahir Department of Chemistry Quaid-i-Azam University Department of Chemistry The University of Azad Jammu and Kashmir University of Sargodha Department of Physics

A new compound 3-（2-（3,5-diphenyl-4,5-dihydropyrazol-1-yl）thiazol-4-yl）-2Hchromen-2-one was synthesized by cyclocondensation of 3,5-diphenyl-4,5-dihydropyrazole-1-carbothioamide with 3-（2-bromoacetyl）-2H-chromen-2-one in ethanol at reflux for 2hrs. The compound was characterized by IR, 1H-NmR, 13C-NmR and single-crystal X-ray diffraction analysis. The newly synthesized compound（C27H19N3O2S） crystallizes in the triclinic system, space group P1 with a = 5.2476（6）, b = 18.289（2）, c = 23.115（3） , α = 93.546（7）, β = 94.715（6）, γ = 92.347（7）°, V = 2204.3（4）3, Z = 4, mr = 449.51, crystal size = 0.38 mm × 0.22 mm × 0.16 mm,（I 2σ（I）） = 35317, 9736, 3785, Rint = 0.081,（Δρ）max = 0.19 and（Δρ）min = –0.24 e·-3. DNA interaction studies revealed that the target compound strongly interacts with DNA through an intercalation binding mode and the binding constant of the compound is 7.45 × 104 m-1.

关键词： binding constant DNA Interaction crystal structure cyclocondensation reaction 1 3-thiazole

在线全文

学校读者我要写书评

暂无评论

基于直接压片的多孔核壳粒子优化和应用

Journal of Chinese Pharmaceutical Sciences 2024年第5期33卷 412-429页

作者：李哲肖燕琳朱琳刘文君杨凌宇金正吉 Abid naeem 朱卫丰冯怡明良山江西中医药大学高等研究院现代中药制备教育部重点实验室江西南昌330004 澳门大学中医药研究所澳门中医药研究发展中心中药品质研究国家重点实验室中国澳门江中药业股份有限公司江西南昌330049 上海中医药大学中药现代制备技术教育部工程研究中心上海201203

采用中心复合设计优化了影响多孔型核壳复合颗粒(PCPs)直接压片(DC)性能的配方参数。分别以PVP和NH4HCO3作为壳层材料和制孔剂,选择共喷雾干燥为制备工艺。以PCPs的产率、流动性、压缩性和崩解时间作为响应值。结果表明,NH4HCO3和PVPK3... 详细信息

采用中心复合设计优化了影响多孔型核壳复合颗粒(PCPs)直接压片(DC)性能的配方参数。分别以PVP和NH4HCO3作为壳层材料和制孔剂,选择共喷雾干燥为制备工艺。以PCPs的产率、流动性、压缩性和崩解时间作为响应值。结果表明,NH4HCO3和PVPK30的最佳配比分别为4.76%和9.42%。产率、流动性、压缩性和崩解时间的测定值分别为62.00%、38.50°、4.02 mPa和14.33 min。预测误差分别为2.99%、1.09%、5.70%和2.28%。在本研究中,最优的PCPs与四种DC辅料混合用于连续DC。结果表明,优化后的PCPs具有优良的直压性能和适用性,为其他中药制备PCPs及实现DC提供思路和理论支持。

关键词：多孔型核壳复合粒子优化喷雾干燥直接压片应用

在线全文

学校读者我要写书评

暂无评论

甘肃省熊蜂分布特征及其影响因素

中国蜂业 2024年第8期15卷 13-13页

作者：安建东 naeem m Chen H Li W Hughes AC Williams PH Bashir NH miao Z Huang J An J 中国农业科学院蜜蜂研究所

近日，中国农业科学院蜜蜂研究所联合曲靖师范学院等单位科研人员发现甘肃省熊蜂呈现四大生物地理区系，净初级生产力是影响熊蜂多样性分布的最主要因素。该研究成果在线发表在《昆虫(Insects)》上。熊蜂是众多植物的传粉者，在陆地生... 详细信息

近日，中国农业科学院蜜蜂研究所联合曲靖师范学院等单位科研人员发现甘肃省熊蜂呈现四大生物地理区系，净初级生产力是影响熊蜂多样性分布的最主要因素。该研究成果在线发表在《昆虫(Insects)》上。熊蜂是众多植物的传粉者，在陆地生态系统中发挥着十分重要的作用。明确影响熊蜂分布的因素对于熊蜂多样性保护至关重要。

关键词： Gansu biodiversity biogeographic regionalization bumblebees canonical correspondence analysis

Evolution of plasma parameters in an Ar-N2/He inductive plasma source with magnetic pole enhancement

同方期刊数据库博看期刊评论

在线全文

学校读者我要写书评

暂无评论

Plasma Science and Technology 2017年第2期19卷 34-42页

作者： maria YOUNUS N U REHmAN m SHAFIQ m naeem m ZAKA-UL-ISLAm m ZAKAULLAH Department of Physics Plasma Physics LaboratoryQuaid-i-Azam University45320 IslamabadPakistan Plasma Physics Laboratory Department of PhysicsCOMSATS Institute of Information Technology44000 IslamabadPakistan Department of Physics Faculty of ScienceJazan University114 JazanSaudi Arabia

magnetic pole enhanced inductively coupled plasmas （maPE-ICPs） are a promising source for plasma-based etching and have a wide range of material processing applications. In the present study Langmuir probe and optical emission spectroscopy were used to monitor the evolution of plasma parameters in a maPE-ICP Ar-Na/He mixture plasma. Electron density （ne） and temperature （Te）, excitation temperature （Texc）, plasma potential （Vp）, skin depth （6） and the evolution of the electron energy probability function （EEPF） are reported as a function of radiofrequency （RF） power, pressure and argon concentration in the mixture. It is observed that ne increases while Te decreases with increase in RF power and argon concentration in the mixture. The emission intensity of the argon line at 750.4 nm is also used to monitor the variation of the ‘high-energy tail＇ of the EEPF with RF power and gas pressure. The EEPF has a ‘bi-maxwellian＇ distribution at low RF powers and higher pressure in a pure N2 discharge. However, it evolves into a ‘maxwellian＇ distribution at RF powers greater than 70 W for pure N2, and at 50 W for higher argon concentrations in the mixture. The effect of argon concentration on the temperatures of two electron groups in the ‘bi-maxwellian＇ EEPF is examined. The temperature of the low-energy electron group TL shows a decreasing trend with argon addition until the ‘thermalization＇ of the two temperatures occurs, while the temperature of high-energy electrons Ta decreases continuously.

关键词： maPE-ICP Langmuir probe OES EEPF

Semiquantitative determination of some nitrogen compounds by the formation of charge-transfer complexes of diphenylamine with p-dimethylaminobenzaldehyde by capillary solid-state spot-tests

在线全文

学校读者我要写书评

暂无评论

Chinese Chemical Letters 2010年第6期21卷 720-724页

作者： Ishaat m.Khan Ahmad naeem Afaq Ahmad Department of Chemistry Faculty of Science Aligarh Muslim UniversityAligarh 202002UPIndia Department of chemistry Shibli National CollegeAzamgarh 276002UPIndia

The interactions of p-dimethylaminobenzaldehyde(p-DAB) and potassium hydrogen sulphate(PHS) in equimolar ratio with various concentration of diphenylamine(solid test material) have been investigated by capillary spot-tests technique in order to investigate the effect of temperature and volume of material in *** formation of the colored boundary in the capillary is taken for the detection of organic compounds by spot-tests at different temperature and volume of solid test material.

关键词： p-DAB Capillary spot-tests Solid material Potassium hydrogen sulphate

minimally invasive and open gallbladder cancer resections: 30-vs 90-day mortality

在线全文

学校读者我要写书评

暂无评论

Hepatobiliary & Pancreatic Diseases International 2017年第4期16卷 405-411页

作者： naeem Goussous motahar Hosseini Anne m Sill Steven C Cunningham Department of Surgery Saint Agnes HospitalBaltimoreMDUSA

BACKGROUND:minimally invasive surgery is increasingly used for gallbladder cancer *** mortality at 30 days is low,but 90-day mortality is ***:Using National Cancer Database(1998-2012),all resection patients were ***-and 90-day mortality rates were ***:A total of 36 067 patients were identified,19 139(53%) of whom underwent *** age was 71 years and 70.7% were ***-day mortality following surgical resection was 2.3-fold higher than 30-mortality(17.1% vs 7.4%).There was a statistically significant increase in 30-and 90-day mortality with poorly differentiated tumors,presence of lymphovascular invasion,tumor stage,incomplete surgical resection and low-volume centers(Pminimally invasive resection between 2010 and 2012,the 90-day mortality was 2.8-fold higher than the 30-day mortality(12.0% vs 4.3%).CONCLUSIONS:Ninety-day mortality following gallbladder cancer resection is significantly higher than 30-day *** mortality is associated with tumor grade,lymphovascular invasion,tumor stage,type and completeness of surgical resection as well as type and volume of facility.

关键词： gallbladder cancer laparoscopic minimally invasive survival radical cholecystectomy complications

The effect of replacing pnictogen elements on the physical properties of Srmg_2X_2(X=N,P,As,Sb,Bi) Zintl compounds

在线全文

学校读者我要写书评

暂无评论

Chinese Physics B 2018年第4期27卷 369-375页

作者： G murtaza Abdul Ahad Khan m Yaseen A Laref naeem Ullah Inayat ur Rahman materials modelling Labortary Department of PhysicsIslamia College University Department of Physics University of the Peshawar Department of Physics University of AgricultureFaisalabad Department of Physics and Astronomy College of ScienceKing Saud University Department of Physics City University of Hong Kong

The effect of replacing the anion from N to Bi down the group in the periodic table is investigated on Srmg2X2（X = N,P,As,Sb,Bi）.A full potential linearized augmented plane wave plus local orbitals method is used along with different exchange–correlation potentials to obtain the lattice constants,phonons,electronic,and optical properties of the Sr mg2X2（X = N,P,As,Sb,Bi） Zintl compounds.A good agreement is achieved and our calculations are validated by previous experimental and theoretical *** compounds have shown stable dynamical behavior with gamma centered longitudinal response having no imaginary *** band structures reveal the semiconducting nature of the *** Pnictogen（X）-p state contributed mainly in the valence band and the Sr-d state forms the conduction of the *** charge transfer and low overlapping of the atomic densities indicates the preferable ionic bonding character of these *** the optical properties,real and imaginary parts of dielectric function,complex refractive index,birefringence,reflectivity,and optical conductivity are *** compounds can be utilized in the optical and optoelectronic devices.

关键词： Zintl compounds band structure optical response

Structural and dielectric properties of doped ferrite nanomaterials suitable for microwave and biomedical applications

在线全文

学校读者我要写书评

暂无评论

Progress in Natural Science:materials International 2015年第5期25卷 419-424页

作者： Imran Sadiq Shahzad Naseem m.ham.ad naeem Ashiq m.A.Khan Shanawer Niaz m.U.Rana Centre of Excellence in Solid State Physics University of the Punjab Institute of Chemical Sciences Bahauddin Zakariya University Department of Physics BUITEMS 4. Department of Physics University of Sargodha

The sol-gel auto-combustion method was adopted to synthesize nanomaterials of single-phase X-type hexagonal ferrites with the composition of Sr;Gd;Ni;Fe;Cd;O;（x=0.00,0.02,0.04,0.06,0.08,0.10 and y = 0,0.1,0.2,0.3,0.4,0.5）.The structural properties were carried out by XRD analysis and the lattice parameters show variation with the doping of *** average particle size measured by TEm was in the range of 8-10 nm which is beneficial in obtaining suitable signal-to-noise ratio in recording media and biomedical *** room temperature resistivity enhanced with the increase of the dopant *** increase in resistivity indicates that the synthesized materials can be considered good for the formation of the multilayer chip inductors（mLCIs） as well as for the reduction of eddy current *** dielectric constant decreased with the increase in the frequency which is the general reported trend of the hexagonal ferrites and can be explained on the basis of Koop’s theory and maxwell-Wagner *** abnormal dielectric behavior indicates the formation of small polarons in the *** maximum value of tangent loss at low frequencies reflects the application of these materials in medium frequency devices（mF）.

关键词： Sol–gel Nanocrystalline materials Thermal properties Electrical properties Dielectric properties

Elemental profile of black shales

在线全文

同方期刊数据库

学校读者我要写书评

暂无评论

Chinese Journal Of Geochemistry 2011年第2期30卷 217-219页

作者： KASHIF naeem WASIm Yawar TARIQ m.Bhatti BASHIR m.ham.ad Central Analytical Facility Division Pakistan Institute of Nuclear Science and TechnologyP.O.NiloreIslamabad 45650Pakistan Pakistan Institute of Engineering and Applied Sciences P.O.NiloreIslamabad 45650Pakistan

A black shale sample collected from the Chimiari site(Tarbela) was analyzed for elemental *** coupled plasma-optical emission spectrometry(ICP-OES) was employed to determine major and trace elements in the *** analysis was accomplished for the black shales,which was better than 2.0%.Result shows that the shales are very rich in Ca(25439 μg·g-1),Fe(13933 μg·g-1),Ti(6932 μg·g-1),Al(5993 μg·g-1) and K(2730 μg·g-1).

关键词：黑页岩 ICP-OES 踪迹元素

Evaluating the Impact of Different Tillage Regimes and Nitrogen Levels on Yield and Yield Components of maize (Zea mays L.)

在线全文

学校读者我要写书评

暂无评论

American Journal of Plant Sciences 2016年第6期7卷 789-797页

作者： m.ham.ad naeem shahid m. shahid Ibni Zamir Ihtisham-Ul Haq m. Kamran Khan mazhar Hussain Usman Afzal m. Asim Ihtisham Ali Department of Agronomy University of Agriculture Faisalabad Pakistan

A field study to evaluate the impact of different tillage regimes and nitrogen levels on yield and yield components of maize (Zea mays L.), was conducted during autumn 2014 at Students Farm, Department of Agronomy, University of Agriculture, Faisalabad. The experiment was laid out in RCBD (Randomized Complete Block Design), with split plot arrangement having three replications. The experiment was comprised of three tillage regimes (minimum, Conventional and Deep) and three nitrogen levels viz: 100, 200 and 300 kg•ha-1. Urea was used as a source of nitrogen, sulphate of potash as a source of potassium and triple super phosphate as a source of phosphorous. The amount of phosphorous and potash was constant in all the treatments i.e. 125 kg•ha-1 and 100 kg•ha-1 respectively. Results of present study are summarized as yield parameters are significantly affected by different nitrogen levels and tillage regimes. maximum number of plants at harvest (7.93), number of grain rows per cob (17.70), number of grains per row (34.31), number of grains per cob (678.58), and cob weight (187.50 g) were observed in deep tillage at 200 kg•ha-1 nitrogen application. 1000-grain weight (275.52 g), biological yield (15.66 t•ha-1), grain yield (6.16 t•ha-1) and dried stalk yield (9.91 t•ha-1) were observed maximum in deep tillage at 200 kg•ha-1 nitrogen application. Harvest index significantly affected by tillage regimes and maximum harvest index (39.58%) were recorded in deep tillage which was statistically at par with conventional tillage (38.83%). It was concluded that higher grain yield of maize can be obtained by deep tillage with the application of 200 kg•ha-1 nitrogen application under the prevailing conditions of Faisalabad.

关键词： Tillage Regimes Nitrogen Levels Deep Tillage Biological Yield Harvest Index