http://chineseinput.net/에서 pinyin(병음)방식으로 중국어를 변환할 수 있습니다.
변환된 중국어를 복사하여 사용하시면 됩니다.
Recycling of printed circuit boards (PCBs) to generate enriched rare metal concentrate
Vinod Kumar,이재천,정진기,Manis Kumar Jha,김병수,Ratnakar Singh 한국공업화학회 2015 Journal of Industrial and Engineering Chemistry Vol.21 No.1
An eco-friendly process for recycling obsolete PCBs to get enriched rare-metal concentrate usingphysical separation technique is discussed. Metal concentration in digital video disc (DVD) PCBs is43 wt.% whereas in vacuum cleaner (VC) PCBs 30 wt.% with rare metal of 2.8%. Concentrate grade of88% total metals including 5.85% rare metals in-case of DVD-PCBs while 90% of total metalsincluding 2.81% rare metals in-case of VC-PCBs was achieved by froth flotation. While 75% totalmetals including 9.41% rare metals for DVD-PCBs and 65% total metals including 5.10% rare metalsfor VC-PCBs was obtained by pneumatic separation.
Vinod K. Dumka,Anil K. Srivastava 대한수의학회 2006 Journal of Veterinary Science Vol.7 No.4
The pharmacokinetics and urinary excretion following single intramuscular administration of levofloxacin at a dose of 4 mg/kg was investigated in seven male cross bred calves. Appreciable plasma concentration of levofloxacin (0.38 ± 0.06 μg/ml) was detected at 1 min after injection and the peak plasma level of 3.07 ± 0.08 μg/ml was observed at 1 h. The drug level above MIC90 in plasma was detected up to 12 h after administration. Rapid absorption of the drug was also evident by the high value of the absorption rate constant (2.14 ± 0.24 /h). The overall systemic bioavailability of levofloxacin, after intramuscular administration, was 56.6 ± 12.4%. The high value of AUC (7.66 ± 0.72 mg . h/ml) reflected the vast area of body covered by drug concentration. Extensive distribution of the drug into various body fluids and tissues was noted by the high value of Vdarea (1.02 ± 0.05 l/kg). The high ratio of AUC/MIC (76.6 ± 7.25) obtained in this study indicated excellent clinical and bacteriological efficacy of levofloxacin in calves. The elimination half-life and MRT were 3.67 ± 0.4 h and 5.57 ± 0.51 h, respectively. The total body clearance (ClB) was 204.9 ± 22.6 ml/kg/h. On the basis of the pharmacokinetic parameters, a suitable intramuscular dosage regimen for levofloxacin in calves would be 1.5 mg/ kg repeated at 12 h intervals.
Vinod K. Dumka 대한수의학회 2007 Journal of Veterinary Science Vol.8 No.4
The disposition kinetics of levofloxacin was investigated in six male crossbred calves following single intravenous administration, at a dose of 4 mg/kg body weight, into the jugular vein subsequent to a single intramuscular injection of paracetamol (50 mg/kg). At 1 min after the injection of levofloxacin, the concentration of levofloxacin in plasma was 17.2 ± 0.36 μg/ml, which rapidly declined to 6.39 ± 0.16 μg/ml at 10 min. The drug level above the MIC90 in plasma, was detected for up to 10 h. Levofloxacin was rapidly distributed from blood to the tissue compartment as evidenced by the high values of the distribution coefficient, α (17.3 ± 1.65 /h) and the ratio of K12/K21 (1.83 ± 0.12). The values of AUC and Vdarea were 12.7 ± 0.12 μg.h/ml and 0.63 ± 0.01 l/kg. The high ratio of the AUC/ MIC (126.9 ± 1.18) obtained in this study indicated the excellent antibacterial activity of levofloxacin in calves. The elimination half-life, MRT and total body clearance were 1.38 ± 0.01 h, 1.88 ± 0.01 h and 0.32 ± 0.003 l/kg/h, respectively. Based on the pharmacokinetic parameters, an appropriate intravenous dosage regimen for levofloxacin would be 5 mg/kg repeated at 24 h intervals when prescribed with paracetamol in calves.
Vinod Kumar Gupta,Shilpi Agarwal,Asim Olgun,Halil I brahim Demir,Mehmet Lutfi Yola,Necip Atar 한국공업화학회 2016 Journal of Industrial and Engineering Chemistry Vol.34 No.-
In this study, the removal of cationic dyes, Basic Red 46 (BR46) and Basic Blue 41 (BB41), from aqueoussolution using boron enrichment waste (BW) and molasses modified boron enrichment waste (MBW)based nanoclays was presented in a batch system and fixed-bed column system. The effects of pH,contact time, initial solution concentration, adsorbent dosage, temperature of batch operation on theuptake of both dyes were investigated. The adsorption data were further performed on the basis ofkinetic and isotherm models. According to the results, the dye removal capacity of MBW was higher thanthat of BW. The studies demonstrated that the adsorption patterns occurred according to Langmuirisotherm model and pseudo-second-order kinetic model. The adsorption of two dyes is spontaneous andexothermic in nature. Breakthrough curves obtained from fixed-bed column tests showed that columnadsorption capacities provided strong evidence of the potential of the nanoclay for the technologicalapplications of the basic dyes removal from aqueous solutions.
Vinod Prasad Singh,Divya Pratap Singh 한국고분자학회 2013 Macromolecular Research Vol.21 No.7
Two polymeric ligands, diacetyl oxaloyldihydrazone (DODH), diacetyl malonoylhydrazone (DMDH)and their Co(II), Ni(II), Cu(II) and Zn(II) complexes were synthesized and characterized by elemental analyses, IR,mass, 1H & 13C NMR, ESR and electronic spectral studies. The ligands and their complexes are highly insoluble in water and common organic solvents and decompose at high temperature. The metal atoms are embedded between two polymeric chains of the organic ligands and the monomeric unit of the polymeric chain behaves as a neutral bidentate ligand and coordinate through two >C=N groups to different metals as indicated by 1H & 13C NMR and IR spectral studies. The molecular weights determined by 1H NMR and mass spectral studies suggest oligomeric nature of the ligands and their Zn(II) complexes. The magnetic susceptibility measurements and electronic spectral studies indicate a square planar geometry around the metal ion in Co(II) and Ni(II) complexes. Electronic and ESR spectral studies for Cu(II) complexes suggest a distorted octahedral stereochemistry around the metal atom and 2B1g as the ground state. Thermal studies (TGA and DTA) of some of the complexes in inert atmosphere show a multi-step exothermic decomposition of the bonded organic ligand at high temperature and metal (II) chloride as the end product.
Vinod Kumar Gupta,Gaurav Sharma,Deepak Pathania,N.C. Kothiyal 한국공업화학회 2015 Journal of Industrial and Engineering Chemistry Vol.21 No.1
A pectin zirconium (IV) selenotungstophosphate (Pc/ZSWP) nanocomposite was prepared via sol–gelmethod. The material was characterized using different techniques such as FTIR, SEM and TEM. Theadsorptional/photocatalytic activity of Pc/ZSWP was investigated for the removal of methylene blue andmalachite green dyes in two different conditions. It was revealed that the synergistic adsorptional/photocatalytic degradation of dyes was more efficient than mere adsorption in dark followed byphotocatalysis. The photocatalytic degradation percentage of MB and MG dyes onto Pc/ZSWPnanocomposite was found out to be 89.21 and 79.27% in 3 h of photo irradiation which is higherthan for adsorption in dark followed by photocatalysis. The antimicrobial activity of Pc/ZSWP was alsoascertained against Escherichia coli.
Vinod Kumar,Firdaus Jahan,Shailendra Raghuwanshi,Richi V. Mahajan,Rajendra Kumar Saxena 한국생물공학회 2013 Biotechnology and Bioprocess Engineering Vol.18 No.4
A novel and simple method was developed for the preparation of magnetic Fe3O4 nanoparticles by chemical co-precipitation method and subsequent coating with 3-aminopropyltrimethoxysilane (APTMS) through silanization process. Magnetic Fe3O4-chitosan particles were prepared by the suspension cross-linking and covalent technique to be used in the application of magnetic carrier technology. The synthesized immobilization supports were characterized by scanning electron microscopy (SEM), thermogravimetric analysis (TGA) and X-ray diffraction (XRD). Using glutaraldehyde as the coupling agent, the lipase from R. oryzae was successfully immobilized onto the functionalized magnetic Fe3O4-chitosan beads. The results showed that 86.60% of R. oryzae lipase was bound on the synthesized immobilization support. This immobilized lipase was successfully used for the esterification of phenolic acid which resulted in esterification of phenolic acid in isooctane solvent reaction system for 8 consecutive cycles (totally 384 h), 72.6% of its initial activity was retained,indicating a high stability in pharmaceutical and industrial applications.
A Rough Set Based Classification Model for the Generation of Decision Rules
Vinod Rampure,Akhilesh Tiwari 보안공학연구지원센터 2014 International Journal of Database Theory and Appli Vol.7 No.5
This paper introduces a very important classification aspect for the analysis of huge amount of data stored in databases and other repositories. Numerous classification models are available in the literature, to predict the class of objects whose class level is unknown. Literature reveals that most of the available models are not capable in handling imperfect data. In view of this, present paper proposes a new rough set based classification model to derive the classification (IF-THEN) rules. Furthermore, developed model has been applied to handle bank-loan applications database as either safe, unsafe or risky. However, proposed model can also be used for the analysis of data from other domains.