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利用CvD法由松节油催化分解合成微米炭纤维

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新型炭材料 2011年第5期26卷 356-360页

作者： Kanchan Saxena pramod Kumar v. K. Jain Amity Institute of Advanced Research and Studies (Materials and Devices) Amity University Noida U. P. India

以石墨为基体,硫酸镍为催化剂,利用化学气相沉积通过松节油的催化分解合成了微米炭纤维。利用酸处理和水洗的方法将纤维从石墨和金属杂质中分离出来。利用光学显微镜和扫描电镜发现得到的纤维直径在3μm～5μm。同时,由于自组装的作用... 详细信息

以石墨为基体,硫酸镍为催化剂,利用化学气相沉积通过松节油的催化分解合成了微米炭纤维。利用酸处理和水洗的方法将纤维从石墨和金属杂质中分离出来。利用光学显微镜和扫描电镜发现得到的纤维直径在3μm～5μm。同时,由于自组装的作用也生成了一些海绵状的微米纤维。

关键词：微米炭纤维松节油硫酸镍石墨化学气象沉积

Pathophysiology and Prevention of Paracentesis-induced Circulatory Dysfunction:A Concise Review

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Journal of Clinical and Translational Hepatology 2020年第1期8卷 42-48页

作者： Anand v Kulkarni pramod Kumar Mithun Sharma T R Sowmya Rupjyoti Talukdar Padaki Nagaraj Rao D Nageshwar Reddy Department of Hepatology Asian Institute of GastroenterologyHyderabadIndia Department of Gastroenterology Asian Institute of GastroenterologyHyderabadIndia

Annually,10%of cirrhotic patients with ascites develop refractory ascites for which large-volume paracentesis(LvP)is a frequently used therapeutic ***,although a safe method,is associated with circulatory dysfunction in a significant percentage of patients,which is termed para-centesis-induced circulatory dysfunction(PICD).PICD results in faster reaccumulation of ascites,hyponatremia,renal impairment,and shorter *** is diagnosed through laboratory results,with increases of>50%of baseline plasma renin activity to a value≥4 ng/mL/h on the fifth to sixth day after *** this review,we discuss the pathophysi-ology and prevention of PICD.

关键词： Refractory ascites Plasma renin activity Large-volume paracentesis Cirrhosis Portal hypertension

Synthesis and characterization of multifunctional ZnBr_(2)/PvA polymer dielectrics

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Journal of Advanced Dielectrics 2016年第4期6卷 22-30页

作者： Jagadish Naik R.F.Bhajantri Sunil G.rathod T.Sheela v.Ravindrachary Department of Physics Mangalore University Mangalagangotri-574199KarnatakaIndia Department of Physics Karnatak University Pavate NagarDharwad-580003KarnatakaIndia

Different weight percentage of ZnBr_(2) doped poly(vinyl alcohol)(PvA)free standing composite films were prepared using solution casting *** films were characterized for analyzing structural,dielectric,electrochemical *** paper mainly focused to understand the contribution of physical phenomenon on conductivity in terms of dielectric *** spectrum confirms the interaction between ZnBr_(2) and ***-capacitive behavior observed from cyclic *** properties of the composites follow non-Debye type *** conducting phenomenon occurs due to hopping of ions between coordination sites present in the composite and the segmental relaxation of polymer chain.

关键词： Poly(vinyl alcohol) polymer electrolytes cyclic voltametry dielectrics zinc bromide.

Regiospecific oxidation of an alkyl group of aromatic amine to carbonyl group by DDQ in ***

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Chinese Chemical Letters 2011年第9期22卷 1039-1042页

作者： Madhav S.Mane Ravi S.Balaskar Sandip N.Gavade pramod N.Pabrekar Murlidhar S.Shingare Dhananjay v.Mane Organic Research Laboratory S.C.S.CollegeOmerga413606MSIndia v.G.vaze College Mulund(E)Mumbai400081MSIndia Department of Chemistry Dr.Babasaheb Ambedkar Marathwada UniversityAurangabad431004MSIndia

The regiospecific oxidation of alkyl group of both sterically hindered and unhindered aromatic amine to corresponding carbonyl compound was done in aq. medium by using DDQ. The optimized reaction protocol was found to be most simple, high yielding and novel method for oxidation of alkyl group of aromatic amine in to its carbonyl compound.

关键词： DDQ Aq. medium Regiospecific oxidation Aromatic amine

Microwave assisted,ligand free,copper catalyzed reaction of aryl halides with phenyl urea

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Chinese Chemical Letters 2011年第3期22卷 292-295页

作者： Sandip N.Gavade Ravi S.Balaskar Madhav S.Mane pramod N.Pabrekar Murlidhar S.Shingare Dhananjay v.Mane Organic Research Laboratory S.C.S.CollegeOmerga 413 606(MS)India v.G.vaze College Mulund(E)Mumbai 400081(MS)India Department of Chemistry Dr.Babasaheb Ambedkar Marathwada UniversityAurangabad 431 004(MS)India

The ligand free coupling reaction of phenyl urea with different functionalized aryl halides in the presence of air stable Cu_2O and t-BuOK as a base gives symmetrical and unsymmetrical diarylureas in relatively high *... 详细信息

关键词： Microwave assisted Ligand free Copper catalyze Phenyl urea Aryl halides

An efficient method for the N-arylation of phenylurea via copper catalyzed amidation

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Chinese Chemical Letters 2011年第6期22卷 675-678页

作者： Sandip N.Gavade Ravi S.Balaskar Madhav S.Mane pramod N.Pabrekar Murlidhar S.Shingare Dhananjay v.Mane Organic Research Laboratory S.C.S.College Omerga-413 606MSIndia v.G.vaze College Mulund(E) Mumbai-400081MSIndia Department of Chemistry Dr.Babasaheb Ambedkar Marathwada University

The coupling reaction of phenylurea with different functionalized aryl halides in the presence of air stable CuI,N,N-dimethylethylenediamine as a ligand,and K_3PO_4 as a base gives symmetrical and unsymmetrical diarylureas in relatively high *** method is milder than the palladium catalyzed arylation and avoids the use of toxic phosphine ligands.

关键词： Copper catalyst Urea Aryl halides Amidation

Structural and electrical properties of ferroelectric BiFeO_(3)/HfO_(2) gate stack for nonvolatile memory applications

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Journal of Advanced Dielectrics 2018年第5期8卷 57-63页

作者： Nitish Yadav Kamal Prakash Pandey pramod Narayan Tripathiy Department of Electronics and Communication Engineering Shambhunath Institute of Engineering and TechnologyAllahabadUttar Pradesh 211015India Department of Electronics and Communication Engineering Indian Institute of Information TechnologyAllahabadUttar Pradesh 211015India

Difficulties in the fabrication of direct interface of ferroelectric BiFeO_(3)/HfO_(2) on the gate of ferroelectric field effect transistor(FeFET)is well *** paper reports the optimization and fabrication of ferroelectric/dielectric(BiFeO_(3)/HfO_(2))gate stack for the FeFET *** magnetron sputtering has been used for the deposition of BiFeO_(3),HfO_(2) films and their stack.X-Ray diffraction(XRD)analysis of BiFeO_(3) shows the dominant perovskite phase of(104),(110)orientation at 2θ=32°at the annealing temperature of 500℃.XRD analysis also confirms the amorphous nature of the HfO2 film at annealing temperature of 400℃,500℃ and 600℃.Multiple angle analysis shows the variation ion the refractive index between 2.98–3.0214 for BiFeO_(3) and 2.74–2.9 for the HfO2 film with the annealing ***/Ferroelectric/Silicon(MFS),Metal/Ferroelectric/Metal(MFM),Metal/Insulator/Silicon(MIS),and Metal/Ferroelectric/Insulator/Silicon(MFIS)structures have been fabricated to obtain the electric characteristic of the ferroelectric,dielectric and their *** characteristics of the MFIS structure show the memory improvement from 2.7 v for MFS structure to 4.65 v for MFIS structure with 8 nm of buffer dielectric *** structure also shows the breakdown voltage of 40 v with data retention capacity greater than 9×10^(9)iteration cycles.

关键词： Endurance ferroelectric high-k dielectric memory window MFIS.

Theoretical investigation on mechanical,thermal,and ultrasonic properties of epitaxial nanostructured ZrN layers growth on MgO(001)substrate

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ChemPhysMater 2023年第3期2卷 253-258页

作者： Aadesh Kumar Prajapati Sachin Rai Prashant Srivastav pramod Kumar Yadawa Department of Physics Prof.Rajendra Singh(Rajju Bhaiya)Institute of Physical Sciences for Study and ResearchV.B.S.Purvanchal UniversityJaunpur 222003India

In the present study,we calculated the elastic,mechanical,and thermo-physical properties of Zirconium Nitride(ZrN)/Magnesium Oxide(MgO)(001)nanostructures in the temperature range of 50∼300 K using higher-order elastic *** two fundamental factors,nearest-neighbor distance and hardness parameter,in this tem-perature range,the second-and third-order elastic constants(SOECs and TOECs)are estimated using the Coulomb&Born-Mayer *** computed values of SOECs have been used to calculate Young’s modulus,thermal conductivity,Zener anisotropy,bulk modulus,thermal energy density,shear modulus,and Poisson’s ratio to as-sess the thermal and mechanical properties of the ZrN/MgO(001)nanostructured ***,SOECs are used to calculate the wave velocities for shear as well as longitudinal modes of propagation along crystalline orientations,,andin these temperature *** temperature-dependent Debye average velocity,hardness,melting temperature,and ultrasonic Grüneisen parameters(UGPs)were *** frac-ture/toughness(B/G)ratio in the current investigation was greater than 1.75,indicating that the ZrN/MgO(001)nanostructured layer was ductile in this temperature *** selected materials fully satisfied the Born me-chanical stability *** this ambient temperature,it has been computed how long thermal relaxation takes to complete and how ultrasonic waves are attenuated by thermo-elastic relaxation and phonon-phonon interaction *** results,in combination with other well-known physical properties,can be applied to the non-destructive testing of materials for various industrial applications such as microelectronic devices,optical coatings,batteries,and solar cells.

关键词： Nanostructured layers Elastic properties Thermal conductivity Mechanical properties Ultrasonic properties

Size effects on electrical properties of sol–gel grown chromium doped zinc oxide nanoparticles

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Journal of Materials Science & Technology 2018年第3期34卷 488-495页

作者： Zalak Joshi Davit Dhruv K.N.rathod J.H.Markna A.Satyaprasad A.D.Joshi P.S.Solanki N.A.Shah Department of Physics Saurashtra University Department of Nanotechnology V.V.P.Engineering College FCIPT Institute for Plasma Research Department of Nanoscience and Advanced Materials Saurashtra University

In this communication, we report the results of the studies on electrical properties of Zn0.95Cr0.05O nanoparticles synthesized using sol-gel method. X-ray diffraction （XRD） and transmission electron microscopy （TEM） measurements were performed for the structural and microstructural behaviors of the nanoparticles. Rietveld analysis was carried out to confirm the single phasic nature. High resolution TEM （HRTEM） confirms the nanoscale nature and polycrystalline orientations in the samples. Dielectric response has been understood in the context of universal dielectric response （UDR） model along with the Koop＇s theory and Maxwell - Wagner （M-W） mechanism. variation in ac conductivity with frequency has been discussed in detail in terms of power law fits. Results of the impedance measurements have been explained on the basis of crystal cores and crystal boundary density. Cole - cole behavior has been studied for the impedance data. For potential application of nanoparticles, average normalized change （ANC） in impedance has been estimated and discussed in the light of size effects and oxygen vacancies.

关键词： Size effects Electrical properties Sol-gelZinc oxide Nanoparticles