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Search Results: 1 - 10 of 1981 matches for " Kedar Nath Dwivedi "
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Policy into practice: an experience of Higher Education Link in Child and Adolescent Psychiatry
Kedar Nath Dwivedi,Nisha Dogra,Indira Sharma,Karen Bretherton
Journal of Indian Association for Child and Adolescent Mental Health , 2005,
Abstract: Aim The main aim of the Child and Adolescent Overseas Working Party has been to support the development of services in low-income countries through enhancing their training capacity. This is congruent with the British Council s policy of Higher Education Link. The paper shares an experience of translating such a policy into practice. Method The experience of implementing a British Council Higher Education Link in Child and Adolescent Psychiatry between the two Universities in Varanasi and Leicester is shared. Implication In spite of various difficulties, all parties concerned learnt some valuable lessons and found it to be a worthwhile venture.
Adsorptive Removal of Heavy Metals from Aqueous Solution with Environmental Friendly Material—Exhausted Tea Leaves  [PDF]
Bindra Shrestha, Jagjit Kour, Kedar Nath Ghimire
Advances in Chemical Engineering and Science (ACES) , 2016, DOI: 10.4236/aces.2016.64046
Abstract: In this study adsorptive removal of Pb(II) and Cu(II) from aqueous solution by using environmental friendly natural polymers present in exhausted tea leaves has been studied. The biosorbent was modified with dimethylamine to introduce N-functional groups on the surface of adsorbent. The modified adsorbent was characterized by elemental analysis, zeta potential analysis, SEM, DRFTIR, XRD and TG/DTA analysis to conform the modification. Adsorption capacity of the adsorbent was determined as the function of pH of the solution, initial concentration of the solution and contact time. The adsorption experiments were performed using batch experiments. The maximum adsorption capacities of the adsorbent were found to be 91.68 and 71.20 mg/g for Pb(II) and Cu(II), respectively. To minimize the process cost, regeneration of the biosorbent and recovery of metal ions was explored by desorption study. The results indicate that the adsorbent holds great potential for the sequestration of Pb(II) and Cu(II) from their aqueous solution. Hence the modified exhausted tea leaves (MTL) have been investigated as a new cost effective and efficient biosorbent for removal of Pb(II) and Cu(II) from their aqueous solution.
Functionalization of orange waste with phosphoric group for Anion separation
Kedar Nath Ghimire
Journal of Nepal Chemical Society , 2012, DOI: 10.3126/jncs.v29i0.9275
Abstract: A novel adsorbent, Phosphorylated Orange Juice Residue, POJR, has been investigated. The extent of phosphorylation was measured with the aid of fluorescence X-ray crystallography, which indicates that the degree of phosphorylation is 1.2. The POJR has very high binding affinity for ferric ion. Also bound ferric ions selectively adsorb anions like arsenite, arsenate, selenite, selenate, antimonate and phosphate. DOI: http://dx.doi.org/10.3126/jncs.v29i0.9275 Journal of Nepal Chemical Society Vol. 29, 2012 Page:?110-112 Uploaded date : 12/6/2013 ?
Effective Removal of Fluoride onto Metal Ions Loaded Orange Waste
Kedar Nath Ghimire
Journal of Nepal Chemical Society , 2011, DOI: 10.3126/jncs.v27i1.6660
Abstract: Removal of fluoride is investigated onto several metal ions loaded phosphorylated orange juice residue and commercially available alumina. The experimental results revealed that cerium (IV) loaded phosphorylated orange waste indicated excellent fluoride removal efficiency at acidic pH range and while that lanthanum loaded at neutral pH range. Both the metal loaded adsorbents are found superior to the commercially available activated alumina.
A New Process for the recovery of bio-accumulated cadmium from Scallops
Kedar Nath Ghimire
Journal of Nepal Chemical Society , 2012, DOI: 10.3126/jncs.v30i0.9337
Abstract: A novel process for cadmium recovery from mid gut of scallops is investigated based on the systematic information of the process system. Adsorption of cadmium was accompanied according to the cation exchange mechanism and the equilibrium pH increased to around 7 due to the isomorphous substitution of cadmium with that calcium of SAJR. A complete recovery of cadmium has been achieved from the process that we have developed from this study. DOI: http://dx.doi.org/10.3126/jncs.v30i0.9337 Journal of Nepal Chemical Society Vol. 30, 2012 Page: ?62-65 Uploaded date : 12/16/2013 ?
A New Approach to Mine Frequent Pattern in Spatial Database using TFP-Tree
Kedar Nath Singh,Jitendra Agrawal,Sanjeev Sharma
International Journal of Computer Technology and Applications , 2011,
Abstract: Today there are several skilled algorithms to mine frequent patterns. Frequent item set mining providesthe associations and correlations among items in large transactional or relational database. In this paper a new approach to mine frequent pattern in spatial database using TFP-tree is proposed. The proposed approach generates a TFP-tree that specifies the generations of frequent patterns. Our analysis approach generates maximal frequent patterns and performs only minimal generalizations of frequent candidate sets.
Variable viscosity condition in the modeling of a slider bearing
Kedar Nath Uprety,Stefan C. Mancas
Physics , 2014,
Abstract: To reduce tear and wear of machinery lubrication is essential. Lubricants form a layer between two surfaces preventing direct contact and reduce friction between moving parts and hence reduce wear. In this short letter the lubrication of two slider bearings with parallel and nonparallel is studied. First, we show that bearings with parallel plates cannot support any load. For bearings with nonparallel plates we are interested on how constant and temperature dependent viscosity affects the properties of the bearings. Also, a critical temperature for which the bearings would fail due to excess in temperature is found for both latter cases. If the viscosity is constant, the critical temperature is given by an explicit formula, while for the non-constant viscosity the critical temperature can be always found from a closed form formula involving Weber functions
Surface Modification of the Biowaste for Purification of Wastewater Contaminated with Toxic Heavy Metals—Lead and Cadmium  [PDF]
Bindra Shrestha, Jagjit Kour, Puspa Lal Homagai, Megh Raj Pokhrel, Kedar Nath Ghimire
Advances in Chemical Engineering and Science (ACES) , 2013, DOI: 10.4236/aces.2013.33022
Abstract:

The surface of a biowaste was modified by introduction of amino group for the purification of wastewater contaminated with heavy metals. In this study waste tea leaf was used as a biowaste which was an economic and efficient bioadsorbent. The aminated tea leaves were characterized by spectral and elemental analysis. The adsorption capacity of the surface modified biosorbent was studied as the function of solution pH, concentration of metal ions and contact time of adsorption. The applicability of Langmuir isotherm was tested. The adsorption capacities were found to be 83.04 mg/g and 57 mg/g for Pb (II) and Cd (II), respectively. The biosorbent was regenerated by desorption of the metal loaded adsorbent with 0.1 M HNO3. These results showed that the aminated tea leaves may be an attractive alternative for treatment of wastewater contaminated with heavy metals.

Environmentally Benign Adsorption Materials for Removing Arsenic from Aquatic Environment  [PDF]
Katsutoshi Inoue, Hiroyuki Harada, Kedar Nath Ghimire, Biplob Kumar Biswas, Hidetaka Kawakita, Keisuke Ohto
Advances in Materials Physics and Chemistry (AMPC) , 2018, DOI: 10.4236/ampc.2018.81005
Abstract: Adsorptive removal of arsenic using adsorption gels prepared from orange and apple juice residues was reviewed by summarizing the authors’ previous papers. Orange and apple juice residues contain a large amount of pectin, partly methyl-esterified pectic acid, which exhibits high affinity for high-valent metal ions such as iron(III), rare earths(III) and zirconium(IV). Anionic species of arsenic(III, V) are effectively and selectively adsorbed on pectic acid gel via loading these high-valent metal ions. Raw orange juice residue was saponified using calcium hydroxide to improve the loading capacity for these metal ions. It was found that zirconium(IV) exhibits the most suitable adsorption behaviors for arsenic(III, V). Similar result was obtained also for apple juice residue. An actual sample of acid mine drainage from the Horobetsu mine which contained a high concentration of iron and low concentration of arsenic, was tested using the adsorption gel prepared from orange juice residue and the results were compared with those from the current treatment process based on coprecipitation with iron hydroxide. The new process using the above- mentioned adsorption gel was proposed for treatment of such acid mine drainage.
Genetic Diversity of Pigeonpea (Cajanus cajan (L.) Millsp.) Cultivars and Its Wild Relatives Using Randomly Amplified Polymorphic DNA (RAPD) Markers  [PDF]
Kusum Yadav, Sanjay Kumar Yadav, Anurag Yadav, Veda Prakash Pandey, Upendra Nath Dwivedi
American Journal of Plant Sciences (AJPS) , 2012, DOI: 10.4236/ajps.2012.33038
Abstract: Genetic diversity among and between 16 cultivars of pigeonpea (Cajanus cajan (L) Millsp.) and its wild relatives (C. albicans and C. lineatus) analysed using RAPD. Twenty two random primers with an average of 71.2% polymorphism produced 151 polymorphic bands. Cluster analysis based on these 151 RAPD markers revealed relatively low level (0.434 - 0.714) of genetic diversity among cultivars and high level of diversity between cultivars and wild relatives. C. albicans and C. lineatus showed only 0.231 similarity with each other and C. albicans showed relatively higher similarity with C. cajan cultivars than that showed by C. lineatus. In dendrogram the 16 cultivars grouped into two distinct clusters comprising of seven and nine genotypes each while the wild species form out groups. Bootstrap analysis of the dendrogram was performed and resulted in significant bootstrap values. Principal components analysis (PCA) also revealed the similar results that of unweighted pair group method with arithmetic mean (UPGMA). The first, second and third PCs contributed 55.9%, 5.9%, and 5.6% of the variation, respectively, with cumulative variation of the first three PCs was 67.4%.
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