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- 저자 : V. V. Chaudhari (검색결과 18 건)
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A.V. Kadu,S.V. Jagtap,G.N. Chaudhari 한국물리학회 2009 Current Applied Physics Vol.9 No.6
Zn1-xMnxFe2O4 (x = 0, 0.2 and 0.4) nanomaterials were synthesized by sol–gel citrate method and studied structural and gas sensing properties. The structural characteristics of synthesized nanomaterials were studied by X-ray diffraction measurement (XRD) and transmission electron microscope (TEM). The results revealed that the particle size is in the range of 30–35 nm for Mn–Zn ferrite with good crystallinity. The gas sensing properties were studied towards reducing gases like LPG, CH4, CO and ethanol and it is observed that Mn–Zn ferrite shows high response to ethanol at relatively lower operating temperature. The Zn0.6Mn0.4Fe2O4 nanomaterial shows better sensitivity towards ethanol at an operating temperature 300 ℃. Incorporation of 1.5 wt.% Pd improved the sensitivity, selectivity, response time and reduced the operating temperature from 300 ℃ to 230 ℃ for ethanol sensor. The response time of 200 ppm ethanol in air is about 10s. Zn1-xMnxFe2O4 (x = 0, 0.2 and 0.4) nanomaterials were synthesized by sol–gel citrate method and studied structural and gas sensing properties. The structural characteristics of synthesized nanomaterials were studied by X-ray diffraction measurement (XRD) and transmission electron microscope (TEM). The results revealed that the particle size is in the range of 30–35 nm for Mn–Zn ferrite with good crystallinity. The gas sensing properties were studied towards reducing gases like LPG, CH4, CO and ethanol and it is observed that Mn–Zn ferrite shows high response to ethanol at relatively lower operating temperature. The Zn0.6Mn0.4Fe2O4 nanomaterial shows better sensitivity towards ethanol at an operating temperature 300 ℃. Incorporation of 1.5 wt.% Pd improved the sensitivity, selectivity, response time and reduced the operating temperature from 300 ℃ to 230 ℃ for ethanol sensor. The response time of 200 ppm ethanol in air is about 10s.
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( Rohan Jagat Chaudhary ),( V. Sagar Puppala ),( Thiagarajan S. ),( Prashant Bhangui ),( Amit Rastogi ),( Tarun Piplani ),( S. Baijal ),( V. Vohra ),( Arvinder Singh Soin ) 대한간학회 2020 춘·추계 학술대회 (KASL) Vol.2020 No.1
Aims: To study the outcomes of our algorithmic-approach for safe optimisation and surgical planning in patients with Hilar- Block. Methods: Retrospective-analysis of prospectively-maintained database of patients undergoing surgery for hilar-block from Jan2013-May2019 was done.Our approach includes Imaging, Biliary-decompression, Future-liver-remnant-Volume(FLR)augmentation based on CT-Volumetry and FLR-function assessment. Results: 45cases of hilar-blocks underwent resections.32were Hilar-cholangiocarcinoma,5-Intrahepatic-cholangiocarcinoma, 6-Ca-Gall-Bladder with hilar-block,2-IgG4-sclerosing- cholangitis-presenting as malignant-masquerade. The mean age was57±12years and 30(67%) were males. On MRCP, hilar-blocks types 2,3a,3b,4 were 3,15,17,10 respectively. Pre-operative biliary-decompression of FLR were done in 21cases[19 PTBD(Percutaneous-Transhepatic-biliary-drainage)/ 2 EBD(Endoscopic-biliary-drainage)]. Additional PTBD were done in 2 cases for inadequate fall in SB, and 3 for cholangitis. The mean SB(Serum-Total-Bilirubin) at presentation was 9.57±5.58mg/dl. The rate of fall of S.bilirubin was faster in patients < 50yrs of age and type-3 hilar-blocks than in type-4 hilar- blocks. PVE was performed in 14cases and FLR hypertrophy of 11.3± 3.03%was achieved.The quality of FLR was assessed with LAI(n=39),fibroscan(n=17), ICGR15(n=12), HVPG (n=35), and selective-remnant-biopsy(n=14,if HVPG >10 mm Hg,ICGR15> 15%, or in-suspected steatosis or fibrosis).After optimization, surgical procedures done were Right-Hepatectomy(7), Right-TriSectorectomy(7), Extended-Right-Hepatectomy(9), Left-Hepatectomy(6),Extended-Left-Hepatectomy(5), Left-Trisectorectomy( 8) and Bile-duct-excision-alone(3).Eleven patients required concomitant vascular-resections and reconstructions(- 8portal-vein-resections, 2 hepatic-arterial-resection,1both) to obtain R0. R0 and R1 resections were achieved in 42(93%) and 3 patients. Clavien-Dindo-Grade3/4 complications were 22.2%(n=10). 8(18%)patients had Post-Hepatectomy-Liver- Failure.Overall operative-mortality was 5/45(11.1%). Conclusions: Our algorithmic approach for safe optimization by preoperative-biliary-drainage, FLR-augmentation and FLR-functional- assessment have led to a high rate of R0 major liver resection and good outcomes in patients with hilar-blocks.Augmentation of FLR can also increase resectability in borderline resectable cases.
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Ternary Nanocomposite for Solar Light Photocatalyic Degradation of Methyl Orange
Kumar, Akash,Billa, Sanjeev,Chaudhary, Swati,Kiran Kumar, A.B.V.,Ramana, Ch.V.V.,Kim, D. Elsevier 2018 INORGANIC CHEMISTRY COMMUNICATIONS Vol.97 No.-
<P><B>Abstract</B></P> <P>In the present work, we reported the preparation of ZnO/PANI/RGO ternary nanocomposite by physical blending method and its photocatalytic efficiency of degradation of methyl orange under solar light. The samples were characterized by XRD, FTIR and UV–Vis spectroscopy. Optical band gap was calculated using Tauc plot for ZnO, PANI and RGO. The photocatalytic studies were evaluated using Methyl Orange with a degradation rate of 99% in 50 min. It is observed that photocatalytic efficiency enhanced by PANI (wt%). The PANI has the ability to create more charge carriers and delay the recombination process. The kinetic studies fitted to pseudo first order reaction. The nanocomposite acts as a promising photocatalyst for the removal of organic pollutants from water.</P> <P><B>Highlights</B></P> <P> <UL> <LI> Preparation of ZnO/PANI/RGO ternary nanocomposite by physical blending method. </LI> <LI> Photocatalytic degradation of methyl orange under solar light. </LI> <LI> The kinetic studies fitted to pseudo-first order reaction. </LI> <LI> Methyl Orange degradation rate is 99% in 50 minutes. </LI> </UL> </P> <P><B>Graphical abstract</B></P> <P>Photocatalytic Mechanism of ZnO/PANI/RGO nanocomposite.</P> <P>[DISPLAY OMISSION]</P>
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Chaudhari, Atul A,Jawale, Chetan V,Kim, Sam Woong,Lee, John Hwa BioMed Central 2012 VETERINARY RESEARCH Vol.43 No.-
<P>In order to develop a novel, safe and immunogenic fowl typhoid (FT) vaccine candidate, a <I>Salmonella</I> Gallinarum ghost with controlled expression of the bacteriophage PhiX174 lysis gene <I>E</I> was constructed using pMMP99 plasmid in this study. The formation of the <I>Salmonella</I> Gallinarum ghost with tunnel formation and loss of cytoplasmic contents was observed by scanning electron microscopy and transmission electron microscopy. No viable cells were detectable 24 h after the induction of gene <I>E</I> expression by an increase in temperature from 37 °C to 42 °C. The safety and protective efficacy of the <I>Salmonella</I> Gallinarum ghost vaccine was tested in chickens that were divided into four groups: group A (non-immunized control), group B (orally immunized), group C (subcutaneously immunized) and group D (intramuscularly immunized). The birds were immunized at day 7 of age. None of the immunized animals showed any adverse reactions such as abnormal behavior, mortality, or signs of FT such as anorexia, depression, or diarrhea. These birds were subsequently challenged with a virulent <I>Salmonella</I> Gallinarum strain at 3 weeks post-immunization (wpi). Significant protection against the virulent challenge was observed in all immunized groups based on mortality and post-mortem lesions compared to the non-immunized control group. In addition, immunization with the <I>Salmonella</I> Gallinarum ghosts induced significantly high systemic IgG response in all immunized groups. Among the groups, orally-vaccinated group B showed significantly higher levels of secreted IgA. A potent antigen-specific lymphocyte activation response along with significantly increased percentages of CD4<SUP>+</SUP> and CD8<SUP>+</SUP> T lymphocytes found in all immunized groups clearly indicate the induction of cellular immune responses. Overall, these findings suggest that the newly constructed <I>Salmonella</I> Gallinarum ghost appears to be a safe, highly immunogenic, and efficient non-living bacterial vaccine candidate that protects against FT.</P>
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Yatoo, M.A.,Chaudhary, L.C.,Agarwal, N.,Chaturvedi, V.B.,Kamra, D.N. Asian Australasian Association of Animal Productio 2018 Animal Bioscience Vol.31 No.5
Objective: An experiment was conducted to study the effect of a blend of essential oils (BEO) on enteric methane emission and growth performance of buffaloes (Bubalus bubalis). Methods: Twenty one growing male buffaloes (average body weight of $279{\pm}9.3kg$) were divided in to three groups. The animals of all the three groups were fed on a ration consisting of wheat straw and concentrate mixture targeting 500 g daily live weight gain. The three dietary groups were; Group 1, control without additive; Group 2 and 3, supplemented with BEO at 0.15 and 0.30 mL/kg of dry matter intake (DMI), respectively. Results: During six months feeding trial, the intake and digestibility of dry matter and nutrients (organic matter, crude protein, ether extract, neutral detergent fibre, and acid detergent fibre) were similar in all the groups. The average body weight gain was tended to improve (p = 0.084) in Group 2 and Group 3 as compared to control animals. Feeding of BEO did not affect feed conversion efficiency of the animals. The calves of all the three groups were in positive nitrogen balance with no difference in nitrogen metabolism. During respiration chamber studies the methane production (L/kg DMI and L/kg digestible dry matter intake was significantly (p<0.001) lower in Group 2 and Group 3 as compared to control animals. Conclusion: The results indicated that the BEO tested in the present study have shown potential to reduce enteric methane production without compromising the nutrient utilization and animal performance and could be further explored for its use as feed additive to mitigate enteric methane production in livestock.
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Marathe, R.,Tatiya, P.,Chaudhari, A.,Lee, J.,Mahulikar, P.,Sohn, D.,Gite, V. Elsevier 2015 INDUSTRIAL CROPS AND PRODUCTS Vol.77 No.-
In this article, we represent preparation of renewable source based smart polyurethane coatings reacting polyols prepared by acetylation of neem oil with different diisocyanates in presence of encapsulated corrosion inhibitor. The structures of polyols were confirmed by Fourier transfer infra-red and nuclear magnetic resonance spectroscopic techniques. The prepared polyols were used to form polyurethane coatings by treating with diisocyanates such as methylene phenyl, dicyclohexylmethane, and isophorone diisocyanates. Further, conversion of polyurethane to smart coatings was carried by incorporation of encapsulated form of quinoline as a corrosion inhibitor. Coatings were characterized for their thermal stability and physico-chemical properties by suitable sophisticated techniques. Anticorrosive properties of the smart coatings were studied by exposing them to corrosive medias like 0.5M HCl and 3.5% NaCl solutions. Incorporation of encapsulated corrosion inhibitor into the neem oil based smart PU coatings shown enhanced anticorrosive property. Finding of this study also shown encapsulated form of commercial corrosion inhibitor can be extended for other PU coatings.
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P.A. Murade,V.S. Sangawar,G.N. Chaudhari,V.D. Kapse,A.U. Bajpeyee 한국물리학회 2011 Current Applied Physics Vol.11 No.3
Nanocrystalline La_(1-x)Sr_xFeO_3 (x = 0, 0.1, 0.2, 0.3 and 0.4) was prepared by sol―gel citrate method. The structural and microstructural characterization has been carried out with the help of X-ray diffraction (XRD)and transmission electron microscopy (TEM), respectively. XRD studies confirm the formation of LaFeO_3with perovskite phase. Further studies by Fourier transform infrared spectroscopy were also conducted. DC electrical properties of the prepared nanoparticles were studied by D.C. conductivity measurements. The gas-sensing performance of the as-prepared La_(1-x)Sr_xFeO_3 nanoparticles was investigated towards different reducing gases like acetone (CH_3COCH_3), ethanol (C_2H_5OH), hydrogen sulfide (H_2S), hydrogen (H_2) and liquefied petroleum gas (LPG). The nanocrystalline La_0.7Sr_0.3FeO_3 exhibited good sensing performance towards acetone gas with rapid response and high sensitivity at 275 ℃ as compared with LaFeO_3.
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Lee, John Hwa,Chaudhari, Atul A,Oh, In Gyoung,Eo, Seong Kug,Park, Sang-Youel,Jawale, Chetan V Canadian Veterinary Medical Association = Associat 2015 Canadian journal of veterinary research Vol.79 No.3
<P>In this study, the immune responses to and protective efficacy of a live attenuated Salmonella-delivered vaccine candidate secreting the papA, papG, iutA, and clpG antigens of Escherichia coli were evaluated against infection with avian pathogenic E. coli (APEC) in layer chickens. Primary vaccination was done at age 7 d and booster vaccination at age 5 wk. The levels of intestinal secretory immunoglobulin A specific to the 4 antigens were significantly higher in the vaccinated group than in the control group. A potent lymphocyte-proliferation response and increased levels of interferon-gamma, interleukin-2, and interleukin-6 in the plasma and in culture supernatants of antigen-stimulated lymphocytes from the vaccinated group suggested significant induction of the cell-mediated immune response in this group compared with the control group. Upon challenge with a virulent APEC strain at 8 wk of age, the vaccinated group had no deaths, whereas the control group had a 15% mortality rate. In addition, the morbidity rate was significantly higher in the control group (55%) than in the vaccinated group (15%). Thus, giving primary and booster vaccination with the Salmonella-delivered APEC vaccine candidate significantly elevated both mucosal and cellular immune responses, which protected the chickens against colibacillosis.</P>
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