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OALib Journal期刊

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Variation of capsaicinoids in chilli (Capsicum frutescens L.) cultivars with the maturity of fruits in middle hill conditions of western Himalayas
Pandey Hemant,Deendayal,Pandey Vandna,Pant Tribhuwan
International Journal of Green Pharmacy , 2010,
Abstract: The three chilli (Capsicum frutescens L.) cultivars viz. chilli DARL 210, Chilli Long Black and Sartoria were grown in middle hill climatic conditions of western Himalayas at an altitude of 5,500 feet above the sea level. The variation in total capsaicinoids (Capsaicin and dihydrocapsaicin) was studied from budding to full maturity stage of fruits. The fruits were harvested at every fifteen days interval from flower budding (stage zero) to full maturity stage (stage seven). The total capsaicinoids were evaluated with the help of HPLC. It can be concluded from the study that, to achieve maximum pungency (total capsaicinoids) in these cultivars, the chilli cv. DARL 210 should be harvested at the stage of full maturity (after 105 days). Whereas, Chilli long black should be harvested after 75 days and cultivar Sartoria in between 60 to 90 days from flower budding stage. As far as pungency among these cultivars is concerned DARL 210 was the most pungent followed by Chilli Long black, while Sartoria was found least pungent cultivar.
Comparative Study of Stress Analysis of Helical Gear Using AGMA Standards and FEM .
Tribhuwan Singh,Mohd. Parvez
International Journal of Engineering Sciences & Research Technology , 2013,
Abstract: Gearing is one of the most effective methods for transmitting power and rotary motion from the source to its application with or without change of speed or direction. The bending and surface strength of the gear tooth are considered to be one of the main contributors for the failure of the gear in a gear set. Thus, determination of stresses has become popular as an area of research on gears to minimize or to reduce the failures and for optimal design of gears. This thesis investigates the characteristics of an involute helical gear system mainly focused on bending and contact stresses using analytical and finite element analysis. To estimate the bending stress, three-dimensional solid models for different number of teeth are generated by Pro/Engineer that is a powerful and modern solid modeling software and the numerical solution is done by ANSYS, which is a finite element analysis package. The analytical investigation is based on Lewis stress formula. This thesis also considers the study of contact stresses induced between two gears. Present method of calculating gear contact stress uses Hertz's equation. To determine the contact stresses between two mating gears the analysis is carried out on the equivalent contacting cylinders. The results obtained from ANSYS are presented and compared with theoretical values. Face width and helix angle are important geometrical parameters in determining the state of stresses during the design of gears. Thus, in this work a parametric study is conducted by varying the face width and helix angle to study their effect on the bending stress of helical gea
Critical analysis of correlation and heritability phenomenon in the silkworm, Bombyx mori (Lepidoptera: Bombycidae)  [PDF]
Tribhuwan Singh, Madan Mohan Bhat, Mohammad Ashraf Khan
Advances in Bioscience and Biotechnology (ABB) , 2011, DOI: 10.4236/abb.2011.25051
Abstract: Correlation and heritability studies of quantitative traits are a pre-requisite for judicious selection for genetic improvement of complex characters of economic importance. The success of selection is governed by the degree to which the desired trait is transmitted to the succeeding generation. The nature of selection is to be given due consideration at appropriate developmental stages for pursuing selection in desired direction while improving or evolving high productive breeds or hybrids of the silkworm. Characters showing high heritability as well as high genetic advance respond better to simple phenotypic selection while those having low heritability and low genetic advance may respond better to mass selection. Characters showing high heritability and low genetic advance may yield good response to hybridization and recurrent selection. An attempt has been made in this review article to briefly discuss the magnitude of correlation and heritability in selection strategies for the improvement of quantitative traits in desired direction in the silkworm, Bombyx mori (L.).
Land Use Impact on Bioavailable Phosphorus in the Bronx River, New York  [PDF]
Jingyu Wang, Hari Pant
Journal of Environmental Protection (JEP) , 2011, DOI: 10.4236/jep.2011.24038
Abstract: Various forms of phosphorus (P) could become bioavailable such as from desorption, dissolution and enzymatic hydrolysis. Potential bioavailable P estimation is critical to minimize eutrophication in freshwater systems. Thus, this study was conducted to predict potential bioavailable P in the water columns and sediments and their relations with enzymatic hydrolysis, and estimate impacts of land use and anthropogenic activities on P bioavailability, P transport and water quality in the Bronx River, New York, USA. In sediment samples collected in 2006, total P (TP), total inor-ganic P (IP), total organic P (OP) and bioavailable P (BAP) were in highest concentrations in sites located at Bronx River Valley upstream in Westchester (site 2), Troublesome Brook (TB, site 4), Sprain Brook (SB, site 7b) and Bronx River estuary near Sound View Park (site 14) respectively. Also, phosphodiesterase and native phosphatases (PDEase and NPase) hydrolyzed distinguishingly high amounts of OP or enzymatically hydrolysable P (EHP) in samples from sites 4, 7b, 10 (New York Botanical Garden) and 14. Microbial P was in negative values (caused by different bacteria and microorganisms could not be paralyzed by chloroform), and the most negative concentrations were appeared at sties 4 and 14. Spatial comparisons among different locations showed distinguished characteristics in tributaries and estuary. In sediments collected in 2007, TP, BAP and IP were in highest concentrations at sites 7-SB, 11-Bronx Zoo, 12-East Tremont Ave Bridge where fresh and saline water meets, 13-estuary facing Hunts Point Waste Water Treatment Plant (HP WWTP) and 14-estuary along Sound View Park. Besides, PDEase-P highest concentrations ap-peared at sties 7, 13 and 11, NPase-P concentrations were highest at 7 and 11. Microbial P was highest at sties 11 and 14. Spatial variations showed that higher P content and more intense enzymatic hydrolysis in silty clay finer sediments at site 7, 11 and 13. Temporal variations between the two years’ data showed land use and other anthropogenic factors’ impacts on P transport in river and deposit in sediments. Analysis of the river water samples showed that average soluble reactive P (SRP, 67 μg.l-1) in 2006 and SRP (68μg.l-1) in 2007 both were greater than background P concentration in most natural water (42 μg.l-1).
Strain-induced electronic phase transition and strong enhancement of thermopower of TiS2
Atanu Samanta,Tribhuwan Pandey,Abhishek K. Singh
Physics , 2014, DOI: 10.1103/PhysRevB.90.174301
Abstract: Using first principles density functional theory calculations, we show a semimetal to semiconducting electronic phase transition for bulk TiS 2 by applying uniform biaxial tensile strain. This electronic phase transition is triggered by charge transfer from Ti to S, which eventually reduces the overlap between Ti-(d) and S-(p) orbitals. The electronic transport calculations show a large anisotropy in electrical conductivity and thermopower, which is due to the difference in the effective masses along the in-plane and out of plane directions. Strain induced opening of band gap together with changes in dispersion of bands lead to three-fold enhancement in thermopower for both p- and n-type TiS2 . We further demonstrate that the uniform tensile strain, which enhances the thermoelectric performance, can be achieved by doping TiS2 with larger iso-electronic elements such as Zr or Hf at Ti sites.
Effect of strain on electronic and thermoelectric properties of few layers to bulk MoS$_{2}$
Swastibrata Bhattacharyya,Tribhuwan Pandey,Abhishek K. Singh
Physics , 2014, DOI: 10.1088/0957-4484/25/46/465701
Abstract: The sensitive dependence of electronic and thermoelectric properties of MoS$_2$ on the applied strain opens up a variety of applications in the emerging area of straintronics. Using first principles based density functional theory calculations, we show that the band gap of few layers of MoS$_2$ can be tuned by applying i) normal compressive (NC), ii) biaxial compressive (BC), and iii) biaxial tensile (BT) strain. A reversible semiconductor to metal transition (S-M transition) is observed under all three types of strain. In the case of NC strain, the threshold strain at which S-M transition occurs increases with increasing number of layers and becomes maximum for the bulk. On the other hand, the threshold strain for S-M transition in both BC and BT strain decreases with the increase in number of layers. The difference in the mechanisms for the S-M transition is explained for different types of applied strain. Furthermore, the effect of strain type and number of layers on the transport properties are also studied using Botzmann transport theory. We optimize the transport properties as a function of number of layers and applied strain. 3L- and 2L-MoS$_2$ emerge as the most efficient thermoelectric material under NC and BT strain, respectively. The calculated thermopower is large and comparable to some of the best thermoelectric materials. A comparison between the feasibility of these three types of strain is also discussed.
Estimation of Phosphorus Bioavailability in the Water Column of the Bronx River, New York  [PDF]
Jingyu Wang, Hari K. Pant
Journal of Environmental Protection (JEP) , 2012, DOI: 10.4236/jep.2012.34040
Abstract: Phosphorus (P) is a primary limiting nutrient in rivers and streams, and excessive P results in eutrophication of freshwater systems, in turn, excessive algal growth/toxic algal blooms, oxygen depletion, and water quality degradation. This study analyzed P pool, and hydrolysis of organic P (OP) by native phosphatases (NPase) in the water samples collected in the Bronx River. The soluble reactive P (SRP) of most of the sites’ water collected in 2006 and 2007 were higher (average 67 μg?L–1 and 68 μg?L–1, respectively) than the US Environmental Protection Agency’s (EPA) standard of 15 μg?L–1. The SRP% (SRP/TP%) average was 27% in 2006, much lower than in 2007 of SRP% average 83%. The OP% (OP/TP%) average was 73% in 2006, which was much higher than the OP% in 2007 (which was only 17%). The SRP concentrations and distributions (%), and the total P (TP) concentrations were in substantial amounts compared with other rivers. The NPase hydrolyzed OP % was up to 100% in 2006 and 2007 water samples. The average of NPase% was 59% in 2006 and 73% in 2007. The NPase average concentrations were 348 μg?L–1 in 2006, and 175 μg?L–1 in 2007. The NPase hydrolyzed up to 100% of OP% in the Bronx River water samples at 37?C, indicating a potential threat of eutrophication of freshwater systems as the global rise in temperature may continue to occur.
A review: Advances in microbial remediation of trichloroethylene (TCE)
A review: Advances in microbial remediation of trichloroethylene (TCE)

Prabhakar Pant,Sudhakar Pant,
Prabhakar Pant
,Sudhakar Pant

环境科学学报(英文版) , 2010,
Abstract: Research works in the recent past have revealed three major biodegradation processes leading to the degradation of trichloroethylene. Reductive dechlorination is an anaerobic process in which chlorinated ethenes are used as electron acceptors. On the other hand, cometabolism requires oxygen for enzymatic degradation of chlorinated ethenes, which however yields no benefit for the bacteria involved. The third process is direct oxidation under aerobic conditions whereby chlorinated ethenes are directly used as...
Some fixed point theorems in fuzzy metric space
Vyomesh Pant
Tamkang Journal of Mathematics , 2009, DOI: 10.5556/j.tkjm.40.2009.59-66
Abstract: The aim of the present paper is to extend the study of noncompatible maps in fuzzy metric space by using the notion of R-weak commutativity of type (Ag) in fuzzy metric space. Simultaneously, we provide an answer in fuzzy metric space, perhaps maiden, to the problem of Rhoades (page 243, [18]). We also define an analogue to the recently introduced concept of Property (E.A) by Aamri and Moutawakil [1] and then compare the results obtained by using the Property (E.A) to those obtained by using the notion of noncompatibility.
Computer networks in radiology: An introduction
Pant Rochan
Indian Journal of Radiology and Imaging , 2009,
Abstract:
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