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Analysis of macro and micro nutrients in some Indian medicinal herbs grown in Jaunpur (u.p.) soil  [PDF]
Arun Kumar, Ram Prakash Singh, Narendra Pal Singh
Natural Science (NS) , 2011, DOI: 10.4236/ns.2011.37077
Abstract: Concept of trace elements being “the Inorganic Switches” has evolved during the last several decades. Ayurveda, the traditional Indian medicinal system also emphasises the importance of minor and trace elements in human health and disease. To evaluate elemental contents of some commonly used as health promoter and fever, 5 medicine herbs (stems) namely Guduchi, Vach, Mulahati, Joytishmati and Vidhara have been analyzed for four minor (Na, K, Mg and Ca) and eight trace elements (Cr, Mn, Fe, Co, Ni, Cu, Zn and Cd) by atomic absorption spectrometry and flame photometry. Their accuracy was measured by replicate analyses. In general, elemental contents were found in varying amounts with large range. It is observed that many of medicinal herbs are enriched in one or more elements. Since these elements are bioavailable in natural form, probably in combination with organic constituents, these are likely to be easily assimilated by human bodies. Besides them, two toxic elements Ni and Cd were also found in insignificant amounts as these are likely to have originated from environmental contamination.
Analysis of nutritional elements in Indian medicinal herbs used to cure general weakness  [PDF]
Arun Kumar, Ram Prakash Singh, Narendra Pal Singh
Natural Science (NS) , 2012, DOI: 10.4236/ns.2012.44032
Abstract: Concept of trace elements being “the Inorganic Switches” has evolved during last several decades. Ayurveda, the traditional Indian medicinal system also emphasises the importance of minor and trace elements in human health and disease. To evaluate elemental contents of some commonly used to cure general weakness, 3 medicine herbs namely Beezband (seeds), Gok-shur (fruit) and Talmakhana (seeds) have been analyzed for four minor (Na, K, Mg and Ca) and eight trace elements (Cr, Mn, Fe, Co, Ni, Cu, Zn and Cd) by atomic absorption spectrometry and flame photometry. Their accuracy was measured by replicate analyses. In general, elemental contents were found in varying amounts with large range. It is observed that many of medicinal herbs are enriched in one or more elements. Since these elements are bioavailable in natural form, probably in combination with organic constituents, these are likely to be easily assimilated by human Bodies. Besides them, two toxic elements Ni and Cd were also found in insignificant amounts as these are likely to have originated from environmental contamination.
On cyclic self-orthogonal codes over Zpm
Abhay Kumar Singh,Narendra Kumar
Mathematics , 2015,
Abstract: The purpose of this paper is to study the cyclic self orthogonal codes over $\mathbb{Z}_{p^m}$. After providing the generator polynomial of cyclic self orthogonal codes over $\mathbb{Z}_{p^m}$, we give the necessary and sufficient condition for the existence of non-trivial self orthogonal codes over $\mathbb{Z}_{p^m}$ . We have also provided the number of such codes of length $n$ over $\mathbb{Z}_{p^m}$ for any $ (p,n) = 1 $.
Dielectric Relaxation in Complex Perovskite Oxide Sr(Gd0.5Nb0.5)O3  [PDF]
Pritam Kumar, Ajay Kumar Sharma, Bhrigunandan Prasad Singh, Tripurari Prasad Sinha, Narendra Kumar Singh
Materials Sciences and Applications (MSA) , 2012, DOI: 10.4236/msa.2012.36053
Abstract: The complex perovskite oxide a strontium gadolinium niobate (SGN) synthesized by solid-state reaction technique has single phase with tetragonal structure. X-ray diffraction (XRD) technique and scanning electron microscopy (SEM) were used to study the structural and microstructural properties of the ceramics, respectively. The XRD patterns of SGN at room temperature show a tetragonal structure. Studies of the dielectric constant and dielectric loss of compound as a function of frequency (50 Hz to 1 MHz) at room temperature, and as a function of temperature (60°C to 420°C) indicate polydispersive nature of the material. The logarithmic angular frequency dependence of the loss peak is found to obey the Arrhenius law with activation energy ~0.18 eV. The small value of activation energy of the compound (~0.18 eV) can be explained by mixed ionic-polaronic conductivity mechanism. The grain size of the pellet sample was found to be 1.92 μm. The frequency-dependant electrical data are analyzed in the framework of conductivity and electric modulus formalisms. The complex plane impedance plot shows the grain boundary contribution for higher value of dielectric constant in the law frequency region.
Load Balancing in IP/MPLS Networks: A Survey  [PDF]
Ravindra Kumar Singh, Narendra S. Chaudhari, Kanak Saxena
Communications and Network (CN) , 2012, DOI: 10.4236/cn.2012.42020
Abstract: The present era has witnessed tremendous growth of the Internet and various applications that are supported by it. There is an enormous pressure on Internet Service Providers (ISPs) to make available adequate services for the traffics like VoIP and Video on demand. Since the resources like computing power, bandwidth etc. are limited, the traffic needs to be engineered to properly exploit them. Due to these limitations, terms like Traffic Engineering, Quality of Service (QoS) came into existence. Traffic Engineering broadly includes techniques like multipath routing & traffic splitting to balance the load among different paths. In this document, we survey various techniques proposed for load balancing that are available on the Internet. We here try not to be exhaustive but analyze the important techniques in the literature. Present survey would help to give a new direction to the research in this realm.
Probabilistic Selection of QoS Paths for Improving Survivability in MPLS Networks  [PDF]
Ravindra Kumar Singh, Narendra S. Chaudhari, Kanak Saxena
Communications and Network (CN) , 2013, DOI: 10.4236/cn.2013.54041
Abstract:

Many applications do not fit well with the traditional best effort packet delivery policy of the Internet. These include applications such as Internet telephony and video conferencing which require voice and bulky graphical images transfer. Therefore, the policies of assigning traffic to various service classes and providing service as per the service level agreement of the user with the network provider came into existence. Multi-protocol Label Switching is the backbone of fast switching technology that helps the network service providers to implement these policies. It provides Quality of service oriented reserved paths from the source to the destination for the user’s traffic. Selection of these paths is a cumbersome task, especially when the traffic forecast is totally unknown. Furthermore, nodes and link failures in the Internet worsen the situation. This paper addresses the issue of selecting Label Switched Paths (LSPs) for various traffic demands in the network so that the resultant network has the

Structural and Electrical Characteristics of Ba(Fe0.5Nb0.5)O3-SrTiO3 Ceramic System  [PDF]
Narendra Kumar Singh, Pritam Kumar, Ajay Kumar Sharma, Ram Naresh Prasad Choudhary
Materials Sciences and Applications (MSA) , 2011, DOI: 10.4236/msa.2011.211213
Abstract: A complex structure of barium iron niobate, Ba(Fe0.5Nb0.5)O3 (BFN) and strontium titanate SrTiO3 (ST) was fabricated by a solid-state reaction method. The phase formation of Ba(Fe0.5Nb0.5)O3-SrTiO3 was checked using X-ray diffraction (XRD) technique. The X-ray structural analysis of BFN and BFN-ST ceramics, showed the formation of single-phase compound in the monoclinic system, which is a distorted structure of an ideal cubic perovskite. Careful examination of microstructures of the individual compounds of the system was done by the scanning electron micrograph (SEM), and confirms the polycrystalline nature of the systems. Detailed studies of dielectric and electrical impedance properties of the systems in a wide range of frequency (100Hz - 5MHz) and different temperatures (30°C-285°C) showed that these properties are strongly dependent on temperature and frequency.
Synthesis and Antimicrobial Activity of 4-aryl furo Pyridazines
Ashok Kumar Singh,Narendra Kumar Srivastav
Journal of Nepal Chemical Society , 2012, DOI: 10.3126/jncs.v30i0.9338
Abstract: Benzoyl hydrazides (1a-b) was condensed with furan-2-aldehyde (2) in the presence of sodium hydroxide and dry ethanol, furan-2-yl-benzoyl hydrazone (3a-b) was achieved. Intramolecular cyclization of compound 3a-b with PPE afforded 4-aryl furo pyridazines (4a-b) DOI: http://dx.doi.org/10.3126/jncs.v30i0.9338 Journal of Nepal Chemical Society Vol. 30, 2012 Page: ?66-70 Uploaded date: 12/16/2013 ?
Evaluation of “Indigenous Vaccine” Developed Using “Indian Bison Type” Genotype of Mycobacterium avium subspecies paratuberculosis Strain “S5” of Goat Origin in a Sheep Flock Endemic for Johne’s Disease: A Three Years Trial in India  [PDF]
Shoor Vir Singh, Ajay Vir Singh, Pravin Kumar Singh, Saurabh Gupta, Harendra Singh, Brajesh Singh, Omalur Rajendran Vinodh Kumar, Aripudur Sellappan Rajendiran, Narendra Nath Swain, Jagdip Singh Sohal
World Journal of Vaccines (WJV) , 2013, DOI: 10.4236/wjv.2013.32009
Abstract:

Indigenous vaccine developed from native Indian Bison Type strain (S5”) of Mycobacterium avium subspecies paratuberculosis (MAP) of goat origin was first time evaluated in a sheep flock of Bharat Merino breed located in Mannavanur town of Tamil Nadu in South India. Therapeutic efficacy of the vaccine was evaluated for 3 years between 2008 and 2010, on the basis of improvements in productivity (body weights, reproductive efficiency and survivability), physical condition, clinical symptoms (weakness, diarrhea, wool quality), immune response (sero-conversion) and infection load in feces (shedding). After immunization of the flock in 2008, the successive progenies of 112 and 53 lambs born in 2009 and 2010, respectively were vaccinated. Whereas, 40 lambs born to control animals were kept as unvaccinated controls. Though gain in body weights in vaccinated versus controls were not significant in 2008, growth rates were distinctly superior in Ist and IInd generations of vaccinated lambs. Reproductive performance (tupping percent) and survivability of lambs and adult sheep improved significantly. There was overall reduction in yearly morbidity (diarrhea) and mortality rates of the flock in post vaccination years. Shedding of MAP in feces was reduced in vaccinated sheep by 6.2%, 14.3% and 27.3% in 2008, 2009 and 2010 respectively, whereas shedding increased in the control sheep. Seromonitoring of the animals by indigenous ELISA kit showed enhanced flock immunity in successive generations. Indigenous vaccine reduced clinical disease and shedding and improved immunity and productivity of Bharat Merino flock, endemic for Johne’s disease.

Synthesis of (S)-1-(2-chloroacetyl)pyrrolidine-2-carbonitrile: A key intermediate for dipeptidyl peptidase IV inhibitors
Santosh Kumar Singh,Narendra Manne,Manojit Pal
Beilstein Journal of Organic Chemistry , 2008, DOI: 10.3762/bjoc.4.20
Abstract: An alternative and practical synthesis of (S)-1-(2-chloroacetyl)pyrrolidine-2-carbonitrile was achieved. Reaction of L-proline with chloroacetyl chloride was followed by conversion of the carboxylic acid moiety of the resulting N-acylated product into the carbonitrile via the corresponding amide intermediate. The synthesized pyrrolidine derivative was utilized to prepare DPP-IV inhibitor Vildagliptin.
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