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Search Results: 1 - 10 of 20932 matches for " Ranveer Kumar "
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Ion-Conducting Polymer Electrolyte Based on Poly (Ethylene Glycol) Complexed with Mg(CH3COO)2– Application as an Electrochemical Cell
Anji Reddy Polu,Ranveer Kumar
Journal of Chemistry , 2012, DOI: 10.1155/2012/623581
Abstract: A new Mg2
Impedance Spectroscopy and FTIR Studies of PEG - Based Polymer Electrolytes
Anji Reddy Polu,Ranveer Kumar
Journal of Chemistry , 2011, DOI: 10.1155/2011/628790
Abstract:
Screening of Bacterial Strains for Polygalacturonase Activity: Its Production by Bacillus sphaericus (MTCC 7542)
Ranveer Singh Jayani,Surendra Kumar Shukla,Reena Gupta
Enzyme Research , 2010, DOI: 10.4061/2010/306785
Abstract: At present almost all the pectinolytic enzymes used for industrial applications are produced by fungi. There are a few reports of pectinase production by bacterial strains. Therefore, in the present study, seventy-four bacterial strains, isolated from soil and rotten vegetable samples, were screened for polygalacturonase production. The strain PG-31, which gave maximum activity, was identified as Bacillus sphaericus (MTCC 7542). Maximal quantities of polygalacturonase were produced when a 16-hours-old inoculum was used at 7.5% (v/v) in production medium and incubated in shaking conditions (160?rpm) for 72 hours. The optimal temperature and pH for bacterial growth and polygalacturonase production were found to be and 6.8, respectively. Maximum enzyme production resulted when citrus pectin was used as the carbon source at a concentration of 1.25% (w/v), whereas other carbon sources led to a decrease (30%–70%) in enzyme production. Casein hydrolysate and yeast extract used together as organic nitrogen source gave best results, and ammonium chloride was found to be the most suitable inorganic nitrogen source. The supplementation of media with 0.9% (w/v) D-galacturonic acid led to a 23% increase in activity. Bacillus sphaericus, a bacterium isolated from soil, produced good amount of polygalacturonase activity at neutral pH; hence, it would be potentially useful to increase the yield of banana, grape, or apple juice. 1. Introduction Pectinolytic enzymes or pectinases are a heterogeneous group of enzymes that hydrolyze the pectic substances present in plants. They include polygalacturonases, pectin lyase, and pectin methyl esterase that hydrolyze the glycosidic bonds of pectic substances [1]. Endopolygalacturonase (EC 3.2.1.15) and exopolygalacturonase (EC 3.2.1.67) are the enzymes of particular interest to industry because they act on pectin, hydrolyzing its internal and external glycosidic bonds, producing shorter pectin molecular structures, decreasing the viscosity, increasing the yield of juices, and determining the crystalline structure of the final product [2]. At present almost all the pectinolytic enzymes used for industrial applications are produced by the fungi, namely,. Aspergillus sp., Aspergillus japonicus, Rhizopus stolonifer, Alternaria mali, Fusarium oxysporum, Neurospora crassa, Penicillium italicum ACIM F-152, and many others [3]. There are a few reports of pectinase production by bacterial strains. Some of the bacterial species producing pectinases are Agrobacterium tumefaciens, Bacteroides thetaiotamicron, Ralstonia solanacearum, and
Analysis of Profitability and Risk in New Agriculture Using Dynamic Non-Linear Programming Model
Rakesh Kumar Sharma,Prem Lall Sankhayan,Ranveer Singh
Journal of Agricultural Science , 2010, DOI: 10.5539/jas.v2n1p59
Abstract: Cropping pattern in the Himalayan region of India has undergone a significant change in the recent past. Introduction of horticultural crops such as vegetables, fruits and flowers has led to more intensive agriculture. Such a change, resulting in higher incomes and improvements of the overall living conditions has, however, been accompanied with increased income risk. This emphasizes the need for proper analysis of the cropping pattern, at an appropriate scale, such as a micro watershed. This was achieved by constructing a dynamic non-linear programming model incorporating appropriate objective function, constraints and crop and livestock activity budgets along with risk component present in the gross returns. The model was then solved under alternate policy scenarios by using General Algebraic Modeling Systems (GAMS) for the next 20 years. The optimum cropping plans were then compared with each other and with the existing plan. Tomato and carnation are the preferred crops, if the sole objective is profit maximization. Optimum plan with risk consideration was also assessed by fixing the variance in gross returns at the current level. It reduced the area under tomato in rainy season by growing capsicum and beans. Similarly, peas replaced tomato in winter season and chrysanthemum replaced carnation. By comparing it with the existing plan, it can be inferred that the people are more concerned to risk than the profits. The profits and risks from floriculture are relatively very high as compared to other crops. By removing constraints in credit availability, irrigation facilities, transportation and market yards, large scale production of vegetables and flowers can help in raising the income level.
Global Regulator SATB1 Recruits β-Catenin and Regulates TH2 Differentiation in Wnt-Dependent Manner
Dimple Notani,Kamalvishnu P. Gottimukkala,Ranveer S. Jayani,Amita S. Limaye,Madhujit V. Damle,Sameet Mehta,Prabhat Kumar Purbey,Jomon Joseph,Sanjeev Galande
PLOS Biology , 2012, DOI: 10.1371/journal.pbio.1000296
Abstract: In vertebrates, the conserved Wnt signalling cascade promotes the stabilization and nuclear accumulation of β-catenin, which then associates with the lymphoid enhancer factor/T cell factor proteins (LEF/TCFs) to activate target genes. Wnt/β -catenin signalling is essential for T cell development and differentiation. Here we show that special AT-rich binding protein 1 (SATB1), the T lineage-enriched chromatin organizer and global regulator, interacts with β-catenin and recruits it to SATB1's genomic binding sites. Gene expression profiling revealed that the genes repressed by SATB1 are upregulated upon Wnt signalling. Competition between SATB1 and TCF affects the transcription of TCF-regulated genes upon β-catenin signalling. GATA-3 is a T helper type 2 (TH2) specific transcription factor that regulates production of TH2 cytokines and functions as TH2 lineage determinant. SATB1 positively regulated GATA-3 and siRNA-mediated knockdown of SATB1 downregulated GATA-3 expression in differentiating human CD4+ T cells, suggesting that SATB1 influences TH2 lineage commitment by reprogramming gene expression. In the presence of Dickkopf 1 (Dkk1), an inhibitor of Wnt signalling, GATA-3 is downregulated and the expression of signature TH2 cytokines such as IL-4, IL-10, and IL-13 is reduced, indicating that Wnt signalling is essential for TH2 differentiation. Knockdown of β-catenin also produced similar results, confirming the role of Wnt/β-catenin signalling in TH2 differentiation. Furthermore, chromatin immunoprecipitation analysis revealed that SATB1 recruits β-catenin and p300 acetyltransferase on GATA-3 promoter in differentiating TH2 cells in a Wnt-dependent manner. SATB1 coordinates TH2 lineage commitment by reprogramming gene expression. The SATB1:β-catenin complex activates a number of SATB1 regulated genes, and hence this study has potential to find novel Wnt responsive genes. These results demonstrate that SATB1 orchestrates TH2 lineage commitment by mediating Wnt/β-catenin signalling. This report identifies a new global transcription factor involved in β-catenin signalling that may play a major role in dictating the functional outcomes of this signalling pathway during development, differentiation, and tumorigenesis.
Global Regulator SATB1 Recruits β-Catenin and Regulates TH2 Differentiation in Wnt-Dependent Manner
Dimple Notani,Kamalvishnu P. Gottimukkala,Ranveer S. Jayani,Amita S. Limaye,Madhujit V. Damle,Sameet Mehta,Prabhat Kumar Purbey,Jomon Joseph,Sanjeev Galande
PLOS Biology , 2010, DOI: 10.1371/journal.pbio.1000296
Abstract: In vertebrates, the conserved Wnt signalling cascade promotes the stabilization and nuclear accumulation of β-catenin, which then associates with the lymphoid enhancer factor/T cell factor proteins (LEF/TCFs) to activate target genes. Wnt/β -catenin signalling is essential for T cell development and differentiation. Here we show that special AT-rich binding protein 1 (SATB1), the T lineage-enriched chromatin organizer and global regulator, interacts with β-catenin and recruits it to SATB1's genomic binding sites. Gene expression profiling revealed that the genes repressed by SATB1 are upregulated upon Wnt signalling. Competition between SATB1 and TCF affects the transcription of TCF-regulated genes upon β-catenin signalling. GATA-3 is a T helper type 2 (TH2) specific transcription factor that regulates production of TH2 cytokines and functions as TH2 lineage determinant. SATB1 positively regulated GATA-3 and siRNA-mediated knockdown of SATB1 downregulated GATA-3 expression in differentiating human CD4+ T cells, suggesting that SATB1 influences TH2 lineage commitment by reprogramming gene expression. In the presence of Dickkopf 1 (Dkk1), an inhibitor of Wnt signalling, GATA-3 is downregulated and the expression of signature TH2 cytokines such as IL-4, IL-10, and IL-13 is reduced, indicating that Wnt signalling is essential for TH2 differentiation. Knockdown of β-catenin also produced similar results, confirming the role of Wnt/β-catenin signalling in TH2 differentiation. Furthermore, chromatin immunoprecipitation analysis revealed that SATB1 recruits β-catenin and p300 acetyltransferase on GATA-3 promoter in differentiating TH2 cells in a Wnt-dependent manner. SATB1 coordinates TH2 lineage commitment by reprogramming gene expression. The SATB1:β-catenin complex activates a number of SATB1 regulated genes, and hence this study has potential to find novel Wnt responsive genes. These results demonstrate that SATB1 orchestrates TH2 lineage commitment by mediating Wnt/β-catenin signalling. This report identifies a new global transcription factor involved in β-catenin signalling that may play a major role in dictating the functional outcomes of this signalling pathway during development, differentiation, and tumorigenesis.
A REVIEW ON PHYTOCHEMICAL AND PHARMACOLOGICAL ASPECTS OF CAESALPINIA PULCHERRIMA
Nainwal Pankaj,Nanda Deepak,Batsa Ranveer
International Journal of Research in Ayurveda and Pharmacy , 2011,
Abstract: Herbal medicine has become a popular form of healthcare. Even though several differences exist between herbal and conventional pharmacological treatments, herbal medicine can be tested for efficacy using conventional trial methodology. Several specific herbal extracts have been demonstrated to be efficacious for specific conditions. Even though the public is often misled to believe that all natural treatments are inherently safe, herbal medicines do carry risks. Ultimately, we need to know which herbal remedies do more harm than good for which condition. Because of the current popularity of herbal medicine, research in this area should be intensified Caesalpinia pulcherrima, a plant widely used in the traditional medicinal systems of India has been reported to possess antibacterial, anti-inflammatory, antioxidant, anticancer and immunosuppressive activities. This review highlights some of the phytochemical and pharmacological aspects of the plant which has been searched during their detailed study.
A Complex Network Approach for Collaborative Recommendation
Ranveer Singh,Bidyut Kr. Patra,Bibhas Adhikari
Computer Science , 2015,
Abstract: Collaborative filtering (CF) is the most widely used and successful approach for personalized service recommendations. Among the collaborative recommendation approaches, neighborhood based approaches enjoy a huge amount of popularity, due to their simplicity, justifiability, efficiency and stability. Neighborhood based collaborative filtering approach finds K nearest neighbors to an active user or K most similar rated items to the target item for recommendation. Traditional similarity measures use ratings of co-rated items to find similarity between a pair of users. Therefore, traditional similarity measures cannot compute effective neighbors in sparse dataset. In this paper, we propose a two-phase approach, which generates user-user and item-item networks using traditional similarity measures in the first phase. In the second phase, two hybrid approaches HB1, HB2, which utilize structural similarity of both the network for finding K nearest neighbors and K most similar items to a target items are introduced. To show effectiveness of the measures, we compared performances of neighborhood based CFs using state-of-the-art similarity measures with our proposed structural similarity measures based CFs. Recommendation results on a set of real data show that proposed measures based CFs outperform existing measures based CFs in various evaluation metrics.
Phytochemical Detection and in vitro Evaluation of Tamarind Fruit Pulp for Potential Antimicrobial Activity
Dipali Y. Jadhav,Akshaya K. Sahoo,Jai S. Ghosh,Rahul C. Ranveer,Aruna M. Mali
International Journal of Tropical Medicine , 2012, DOI: 10.3923/ijtmed.2010.68.72
Abstract: The Tamarind (Tamarindus indica) pulp extracts were screened for their anti-microbial activities using the agar well diffusion method and detection of phytochemicals was carried out by Gas-Chromatography-Mass Spectrometry (GC-MS). The extracts were tested against seven bacteria and three fungal strains. Among all tested microorganisms the tamarind pulp extracts exhibited higher antimicrobial activities against Salmonella typhimurium (NCIM 2501) and Staphylococcus aureus (NCIM 5021) and lower activity against Aspergillus niger (NCIM 545). Tamarind pulp extracts were more potent than the tartaric acid solution. The major phytochemicals detected in tamarind pulp extracts were 2-Furancarboxaldehyde, 2, 3-Butanediol, 2-Furancarboxaldehyde, 5-methyl. This investigation throws light on possible applications of the tamarind fruit pulp in natural preservation of food and food products.
Development of Health Drink Enriched with Processed Garden-cress (Lepidium sativum L.) Seeds
Snehal Y. Mohite,Dhanashri B. Gharal,Rahul C. Ranveer,Akshay K. Sahoo
American Journal of Food Technology , 2012,
Abstract: The main objective of this study was to make a formulation which can be easily taken by the consumer. Therefore, it was decided to make a health drink, keeping in view the varied need of different consumers. Garden cress (Lepidium sativum) belongs to family Cruciferae and is grown in India, North America and parts of Europe. The edible whole seed is known to have health promoting properties hence, it was assumed that these seeds can serve as raw material for functional foods, sharing its peppery, tangy flavor and aroma. Since, it is rich in proteins, carbohydrates and certain essential minerals like calcium, iron and phosphorous along with crude dietary fiber (7.6%) it can be used as health drink with milk as its base. An attempt has been made by adding 5% sugar (w/v) in skimmed milk with 1% fat and different quantity of washed, boiled and powdered seeds of garden cress along with sodium salt of Carboxymethyl Cellulose (CMC) as suspending agent. The drink that was found most suitable, with an overall consumer acceptability of 8.75 was that containing 3% of the seed powder.
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