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The Synthesis and Characterization of Arc Melted Fe1-xAlxAlloys

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Journal of Applied Mathematics and Physics 2013年第2期1卷 4-8页

作者： Sandeep Rajan Rajni Shukla Anil Kumar Anupam vyas Ranjeet Kumar Brajpuriya Department of Physics Amity University Haryana Gurgaon India. Department of Physics Deenbandhu Chhotu Ram University of Science & Technology Sonipat India

The paper presents correlation study on a series of Fe1-xAlx alloy samples prepared by arc melting. All the samples show crystalline structure, irrespective of the Al content and are textured mainly along (110) direction. The particle size decreases rapidly with x particularly after x > 0.3. The corresponding magnetic measurements were obtained at room temperature using a VSM, with a maximum applied field of 14 kOe. The results show that the ferromagnetic state of the samples disappears with x, and becomes paramagnetic for alloys with x ≥ 0.4. It is also found that coercivity (Hc) and resistivity increase with x. The results were interpreted in terms of continuous change in their electronic structure i.e. overlap of the electron wave functions of the magnetic atoms with the Al electron wave function.

关键词： Transition Metal Aluminides Magnetization and Electronic Properties

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氯氮平在美国的应用现状(英文)

上海精神医学 2012年第2期24卷 110-113页

作者： Deanna L.KELLY Heidi J.WEHRING Gopal vyas Maryland Psychiatric Research Center University of Maryland School of Medicine

Clozapine is the only antipsychotic in the United States that has been approved by the Food and Drug Administration (FDA) for treatment-resistant schizophrenia. It provides effective treatment even when patients do not respond to other second- generation antipsychotics.[1] It also remains the most effective antipsychotic available. No existing first or second-generation antipsychotic has been

关键词：氯氮平美国精神分裂症精神病药物 FDA 管理局第二代

Allometric equations for estimating leaf area index(LAI) of two important tropical species(Tectona grandis and Dendrocalamus strictus)

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Journal of Forestry Research 2010年第2期21卷 197-200,I0006页

作者： Dhaval vyas Nirav mehta J.Dina-karan N.S.R.Krishnayya Ecology Laboratory Deprtment of BotanyFaculty of ScienceM.S.University of Baroda

Leaf area index（LAI） of Teak（Tectona grandis） and Bamboo（Dendrocalamus strictus） grown in Shoolpaneshwar Wildlife Sanctuary of Narmada District,Gujarat,India was obtained by destructive sampling,photo-grid method and by litter trap *** allometric equation（between leaf area by litter trap method and canopy spread area） was developed for the determination of *** show that LAI value calculated by the developed allometric equation was similar to that estimated by destructive sampling and photo-grid method,with Root Mean Square Error（RMSE） of 0.90 and 1.15 for Teak,and 0.38 and 0.46 for Bamboo,*** was a perfect match in both the LAI values（estimated and calculated）,indicating the accuracy of the developed equations for both the *** conclusion,canopy spread is a better and sensitive parameter to estimate leaf area of *** developed equations can be used for estimating LAI of Teak and Bamboo in tropics.

关键词： bamboo canopy spread area leaf area index specific leaf area teak tropical forest

Electron Momentum Density and X-ray Structure Factors of Fcc-Copper

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World Journal of Condensed Matter Physics 2011年第3期1卷 70-76页

作者： Neha Munjal Pooja Bhambhani Vimal vyas Parvez Ahmad Alvi Ghanshyam Sharma Bal Krishna Sharma Department of Physics Banasthali University Banasthali-304022 India

In this paper, we report the ground state properties i.e. electron momentum density and X-ray structure factors of fcc-copper are presented. The Am241 Compton spectrometer, which uses 59.54 keV gamma-rays, has been used for the Compton profile measurement. To compare the experimental data, the Compton profiles within the framework of linear combination of atomic orbitals (LCAO) method using Hartree–Fock (HF), density functional (DF) and hybrid B3PW schemes embodied in the CRYSTAL06 code have been computed. Among the various theoretical calculations, it is found that the present experimental data is in very good agreement with the hybrid B3PW scheme. A real-space analysis of the experimental Compton profile shows the metal-like behavior of copper The structure factors for copper are computed using hybrid B3PW scheme and compared with available experimental and theoretical data.

关键词： Momentum Density LCAO Method Electronic Structure X-Ray Structure Factors Metallic Behavior Etc

Octa-O-Methoxy Resorcin [4] Arene Amberlite XAD-4 Polymeric Chelating Resin for Solid Phase Extraction, Preconcentration, Separation and Trace Determination of Ni(II), Cu(II), Zn(II) and Cd(II) Ions

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American Journal of Analytical Chemistry 2013年第5期4卷 238-251页

作者： Disha J. vyas Bharat A. Makwana Keyur D. Bhatt Vinod K. Jain Department of Chemistry School of Sciences Gujarat University Ahmedabad India

Synthetic resin, Amberlite XAD-4 was linked covalently with the third generation supramolecule, octa-O-methoxy resorcin [4] arene through -N=N-group to form chelating resin, which has been characterized and effectively used for the separation and preconcentration of metal ions such as Ni(II), Cu(II), Zn(II) and Cd(II). Critical parameters such as pH, flow rate, sorption capacity, breakthrough studies, distribution coefficient, preconcentration factor, concentration of eluting agents responsible for quantitative extraction of metal ions were optimized. The synthesized resin showed good binding affinity towards Ni(II), Cu(II), Zn(II) and Cd(II) under selective pH conditions. Good breakthrough capacity and fast exchange kinetics of the resin lead to effective separation of metal ions from their binary and ternary mixture by column method on the basis of pH and eluting agents. The resin could be reused for about 8 -10 cycles. The proposed method having the analytical data with the relative standard deviation (RSD) 2% and with recoveries of analytes higher than 98%, reflects upon the reproducibility and reliability of the method which has been successfully applied in the separation and determination of Ni(II), Cu(II), Zn(II) and Cd(II) ions in synthetic, natural and ground water samples.

关键词： Separation Preconcentration Amberlite XAD-4 Octa--O-Methoxy Resorcin Arene Solid Phase Extraction

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双氯灭痛控释片的处方和特性评价

药学进展 1990年第3期14卷 169-171页

作者： S.P.vyas N.K.Jain 吴国兴

当亲水的水溶性基质接触水溶液后,就形成了一层假胶状膜,这层膜控制了片子的溶蚀和药物向周围液体扩散的速率。Willis及其同工作者测定了双氯灭痛静脉给药和口服给药的药物动力学。该药动力学的特性曲线提示,以控制药物吸收来达到延长周... 详细信息

当亲水的水溶性基质接触水溶液后,就形成了一层假胶状膜,这层膜控制了片子的溶蚀和药物向周围液体扩散的速率。Willis及其同工作者测定了双氯灭痛静脉给药和口服给药的药物动力学。该药动力学的特性曲线提示,以控制药物吸收来达到延长周期,保证几乎是恒定的血药水平,并具有较小的毒副作用是有可能的。本文拟介绍双氯灭痛控释片的研究。方法为使双氯灭痛从控释片中释放达12h以上,应用Robinson和Eriksen方程,根据所报道的药动学数据计算其修正剂量和维持剂量分别为16.5mg和96.0mg.

关键词：双氯灭痛控释片处方

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从青霉素提取废液中回收青霉素的离子交换剂

国外医药（抗生素分册） 1981年第4期9卷 63-68页

作者： S.N.vyas 包锦芝

在大批生产青霉素 G 钾盐的过程中,提取及结晶的废液和母液中丢失了大量的青霉素。从发酵液中提取青霉素的总收率约75～80%。考虑到生产青霉素的费用昂贵,人们认为从上述废液中回收青霉素的可能性是值得研究的。人们已认识到,为了从青... 详细信息

在大批生产青霉素 G 钾盐的过程中,提取及结晶的废液和母液中丢失了大量的青霉素。从发酵液中提取青霉素的总收率约75～80%。考虑到生产青霉素的费用昂贵,人们认为从上述废液中回收青霉素的可能性是值得研究的。人们已认识到,为了从青霉素的水溶液中回收青霉素,特别是当青霉素在水相中浓度低的时候,离子交换是一种合适的方法。Samsonov 及其同事已在这个领域中做了大量的工作。在硫酸。

关键词：离子交换树脂吸附作用整理剂废液废物青霉素抗菌素树脂床青霉素钾盐

Efficacy and safety of abrocitinib in Chinese patients with moderate-to-severe atopic dermatitis:A post hoc analysis of the JADE REGIMEN phase 3 trial

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Chinese Medical Journal 2024年第16期137卷 1991-1992页

作者： Hang Li Hao Cheng Qianjin Lu Wei Lai Xiaohua Tao Gerardo AEncinas Shefali vyas Bo Wang Xin Luo Shiqi Li Department of Dermatology Peking University First HospitalNational Clinical Research Center for Skin and Immune DiseasesBeijing 100034China Department of Dermatology Sir Run Run Shaw HospitalZhejiang University School of MedicineHangzhouZhejiang 310016China Department of Dermatology The Second Xiangya Hospital of Central South UniversityChangshaHunan 410011China Department of Dermatology The Third Affiliated Hospital of Sun Yat-sen UniversityGuangzhouGuangdong 510630China Department of Dermatology Zhejiang Provincial People’s HospitalHangzhou Medical CollegeHangzhouZhejiang 310014China Pfizer S.A.de C.V. Mexico CityMexico Pfizer Inc. New YorkNYUSA Pfizer Investment Co. LtdBeijing 100010China Pfizer(China)R&D Co. LtdShanghai 201200China Pfizer PBG Shanghai 200041China

To the Editor:Atopic dermatitis(AD)is a chronic inflammatory skin disorder with a relapsing-remitting disease course that warrants flexible dosing.[1,2]In China,abrocitinib,an oral,once-daily,Janus kinase 1-selective inhibitor,is approved at a 100 mg starting dose for adults with refractory moderate-to-severe AD who did not inadequately respond to other systemic therapies(i.e.,corticosteroids or biologics),or for whom these treatments are not *** the response achieved with abrocitinib 100 mg is inadequate,200 mg dosing can be considered,which could be administered as a short-term treatment(≤12 weeks).[3]The phase 3 JADE REGIMEN trial(***,NCT03627767)evaluated maintenance of response with continuous-dose abrocitinib(200 mg),reduced-dose abrocitinib(100 mg),or drug withdrawal(placebo)in patients with moderate-to-severe AD who responded to abrocitinib induction therapy.[4]Here,we aimed to characterize the efficacy and safety of abrocitinib in the Chinese mainland subgroup within JADE REGIMEN.

关键词： dermatitis patients JADE

Improvement of Position Accuracy with GAGAN and the Impact of Scintillation on GNSS

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Positioning 2013年第4期4卷 282-288页

作者： Surendra Sunda B. M. vyas S. V. Satish K. S. Parikh Airports Authority of India Ahmedabad India Airports Authority of India New Delhi India Department of Physics M. L. S. University Udaipur India Space Applications Centre Ahmedabad India

GAGAN is an Indian implementation of Satellite Based Augmentation System (SBAS), developed jointly by Airports Authority of India (AAI) and Indian Space Research Organisation (ISRO). It is in final operational phase with all the required ground and space segments ready. With the availability of GAGAN signal-in-space (SIS), the improvement in position solution is investigated using the two collocated dual frequency GPS receivers. One of the receivers was configured as SBAS receiver and the other was kept as GPS stand-alone receiver. It is found that accuracy in position improved significantly in SBAS receiver due to GAGAN correction. The impact of scintillation on GNSS was also investigated in terms of position degradation and loss of lock of the satellite signals. The manyfold effects of scintillation on GPS and SBAS are discussed in detail. The results indicate ~15% reduction in number of measurements due to loss of lock during severe scintillation.

关键词： GAGAN SBAS Position Scintillation GPS