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Search Results: 1 - 10 of 199172 matches for " Pradeep N. "
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A New Adaptive Technique for Enhancement of Zone-2 Settings of Distance Relay  [PDF]
Avinash N. Sarwade, Pradeep K. Katti, Jayant G. Ghodekar
Energy and Power Engineering (EPE) , 2012, DOI: 10.4236/epe.2012.41001
Abstract: This paper presents a technique that increases the second-zone coverage of distance relays without causing overreach problems. The technique is based on the impedance seen by distance relays when faults are simulated on the reach of zone-1 relays. The approach checks the relay operation for the maximum as well as the minimum generation outputs of the power system. The proposed technique can be used for different reach setting for zone-1. Results show that it is possible to increase the coverage provided by zone-2 distance relays without causing coordination problems with the primary relays that protect the lines emanating from the remote bus. The proposed method is modified for use in an adaptive protection system. It is shown that further improvements can be achieved when settings are calculated using the proposed method and the prevailing system conditions. The proposed method and its adaptive version were applied to a part of the Power system. The simulation of the system is done by using PSCAD-EMTDC software. The simulated results are observed and compared with the conventional and proposed technique.
Characterization of the 3-HKT gene in important malaria vectors in India, viz: Anopheles culicifacies and Anopheles stephensi (Diptera: Culicidae)
Vidhyanandhini, R;Kumar, N Pradeep;
Memórias do Instituto Oswaldo Cruz , 2008, DOI: 10.1590/S0074-02762008000600014
Abstract: the 3-hydroxykynurenine transaminase (3-hkt) gene plays a vital role in the development of malaria parasites by participating in the synthesis of xanthurenic acid, which is involved in the exflagellation of microgametocytes in the midgut of malaria vector species. the 3-hkt enzyme is involved in the tryptophan metabolism of anophelines. the gene had been studied in the important global malaria vector, anopheles gambiae. in this report, we have conducted a preliminary investigation to characterize this gene in the two important vector species of malaria in india, anopheles culicifacies and anopheles stephensi. the analysis of the genetic structure of this gene in these species revealed high homology with the an. gambiae gene. however, four non-synonymous mutations in an. stephensi and seven in an. culicifacies sequences were noted in the exons 1 and 2 of the gene; the implication of these mutations on enzyme structure remains to be explored.
Malformación vascular intraósea en el maxilar que se presenta en forma de sangrado gingival Intra-osseous vascular malformation in the maxilla
Naveenjayakumar,N. Vivek,Pradeep,Nithin
Revista Espa?ola de Cirugía Oral y Maxilofacial , 2009,
Abstract: Las malformaciones arterio-venosas intraóseas (MAVs) en la región maxilofacial son entidades clínicas poco frecuentes. Ofrecen una amplia gama de presentación clínica y no siempre se diagnostican sin sorpresa. El tratamiento de estas lesiones siempre ha representado un reto para el cirujano debido a su intensa vascularización y a la elevada incidencia de recurrencia. Se presenta el caso de una malformación arterio-venosa intraósea en el maxilar superior que se manifiesta como sangrado gingival, cuyos exámenes radiológicos de rutina no fueron concluyentes. Se llevó a cabo la excisión quirúrgica y el empaquetado del hueso con cera, y se realizó el seguimiento del paciente durante 1 a o sin que se produjera recurrencia. Las malformaciones vasculares deben tenerse en consideración en el diagnóstico diferencial del sangrado gingival con radiografías dentales no concluyentes. Intraosseous arterio-venous malformations (AVM) in the maxillofacial region are rare clinical entities. They have a wide range of clinical presentation and are not always diagnosed without a surprise. Treatment of these lesions has always been a challenge to the surgeon due to extreme vascularity and the high recurrence rate. The case presented is that of an intraosseous arterio-venous malformation in the maxilla that started as gingival bleeding and routine radiographic examinations were inconclusive. Surgical excision and bone wax packing was performed there were no recurrences during 1-year of follow-up. Vascular malformations may be considered in differential diagnosis of gingival bleeding with inconclusive dental radiographs.
Comparative genomic studies and in-silco strategies on Leishmania brazilensis, Leishmania infantum and Leishmania major: Conserved features, putative functions and potential drug target
Rakesh N. R.,Pradeep S.
International Journal of Applied Sciences and Biotechnology , 2013, DOI: 10.3126/ijasbt.v1i2.8077
Abstract: Leishmaniasis is a parasitic disease found largely in the tropics, which the World Health Organization has estimated infects 12 million people worldwide each year. More recently cases have been reported in Europe among intravenous drug users with HIV. At least 20 Leishmania species infect humans. New world parasite Leishmania. braziliensis is the causative agent of mucocutaneous Leishmaniasis. The old world species Leishmania. major and Leishmania. infantum, which are present in Africa, Europe and Asia, are parasites that cause cutaneous and visceral Leishmaniasis respectively. Aim of this Study is determination of major common genes and Protein identified Gene location on each of the chromosomes, and identification of a common protein drug target Promastigote surface antigen with available lead molecule acetylglucosamine (6-(acetylamino)-6-deoxyhexopyranose) and docking studies on those considered Leishmania species.
Screening Zizhyphus germ plasm against powdery mildew
T. PRADEEP* and N.D. JAMBHALE
Indian Phytopathology , 2012,
Abstract: Of the 82 ber accessions belonging to Zizhyphus mauritiana and one accession to Z. rugosa evaluated for resistance to powdery mildew under natural epiphytotic conditions, four genotypes viz.,
Possible role of waxes in powdery mildew resistance in Zizhyphus
T. PRADEEP* and N.D. JAMBHALE
Indian Phytopathology , 2012,
Abstract: Total epicuticular wax content in immature fruits of ten ber genotypes and mature leaves of 3 genotypes varying in their ploidy levels and reaction to powdery mildew (PM) caused by Oidium erysiphoides f. zizhyphi was investigated. Quantitative variations were observed, the wax content being high in diploid resistant genotypes
Relationship between phenolics, polyphenol oxidase and peroxidases and resistance to powdery mildew in Zizhyphus
T. PRADEEP* and N.D. JAMBHALE
Indian Phytopathology , 2012,
Abstract:
Synthesis and Antioxidant Activity of 2-Amino-5-methylthiazol Derivatives Containing 1,3,4-Oxadiazole-2-thiol Moiety
Kikkeri N. Mohana,Chikkur B. Pradeep Kumar
ISRN Organic Chemistry , 2013, DOI: 10.1155/2013/620718
Abstract:
The Effect of Achyranthes aspera Extracts on Mild Steel Corrosion in Industrial Water Medium
Chikkur B. Pradeep Kumar,Kikkeri N. Mohana
ISRN Corrosion , 2013, DOI: 10.1155/2013/261847
Abstract: Achyranthes aspera (AA) extracts were studied as corrosion inhibitor for mild steel (MS) in industrial water medium using mass loss and electrochemical techniques. The results of the study revealed that AA extracts inhibit MS corrosion through adsorption process following Langmuir adsorption isotherm model. The protection efficiency increased with increase in inhibitor concentration and decreased with temperature. The electrochemical impedance spectroscopy (EIS) measurements showed that the charge transfer resistance increases with increase in the concentration of AA extracts. The polarization curves obtained indicate that AA extracts act as mixed type of inhibitor. Scanning electron microscopy (SEM) was used to analyze the surface adsorbed film. 1. Introduction The use of inhibitors is one of the most practical methods for protection against corrosion and prevention of unexpected metal dissolution. Different organic and inorganic compounds have been studied as inhibitors to protect metals from corrosive attack. The efficiency of these organic corrosion inhibitors is related to the presence of polar functional groups with S, O, and N atoms in the molecule [1–5]. Such compounds can adsorb onto the metal surface and block the active surface sites, thus reducing the corrosion rate. Nevertheless, most of these compounds are not only expensive but also toxic for living beings. So, plant extracts have attracted the attention of researchers as ecofriendly corrosion inhibitors for many decades [6–9]. Plant extracts are an incredibly rich source of natural chemical compounds that can be extracted by simple procedures with low cost and are biodegradable in nature. The actual inhibitors in the plant extracts are usually alkaloids and other organic nitrogen bases, as well as carbohydrates, proteins, and their acid hydrolysis products [10]. Alkaloids have an ability to coordinate the transition metals or their alloys via the d-orbitals of metal and empty p-orbitals of the heteroatoms in the inhibitor molecules. A number of natural compounds have been used as corrosion inhibitors for metals and their alloys in acidic, alkaline, and neutral solutions [11–15]. Achyranthes aspera (AA) is one of the most important antioxidant medicinal plants, and it is an excellent source of several flavonoids, tannins, reducing sugars, alkaloids, and saponins [16]. Besides these phytoconstituents, several glycosides [17], fatty acids [18], ecdysterone [19], and triterpenoids [20] were isolated in various parts of plant. In the light of phytoconstituents reported, the present study was
Synthesis and Antioxidant Activity of 2-Amino-5-methylthiazol Derivatives Containing 1,3,4-Oxadiazole-2-thiol Moiety
Kikkeri N. Mohana,Chikkur B. Pradeep Kumar
ISRN Organic Chemistry , 2013, DOI: 10.1155/2013/620718
Abstract: A series of new 5-(2-amino-5-methylthiazol-4-yl)-1,3,4-oxadiazole-2-thiol derivatives 6(a–j) were designed and synthesized with various substituted aldehydes. The chemical structures were confirmed by elemental analyses, FT-IR, 1H NMR, and mass spectral studies. The antioxidant activity of the synthesized compounds was evaluated by 2,2-diphenyl-1-picrylhydrazyl (DPPH), hydroxyl, nitric oxide, and superoxide radical scavenging assay methods. Compounds 6a, 6e, and 6c showed significant radical scavenging potential due to the presence of electron donating substituent on substituted aldehydes. 1. Introduction Compounds containing azomethine group (–C=N–) in the structure are known as Schiff bases which are usually synthesized by the condensation of primary amines and active carbonyl groups. Schiff bases are found to exhibit multifunctional properties, and they are able to improve various biological and pharmacological activities such as antitumor, antioxidant, and antibacterial activities [1]. Schiff bases bearing heterocyclic residues possessing excellent biological activity have attracted the attention of many researchers in recent years [2]. Due to the great flexibility and diverse structural aspects of Schiff bases, a wide range of these compounds have been synthesized and their activities have been studied [3, 4]. Many Schiff bases are known to be medicinally important and are used to design medicinal compounds [5]. 1,3,4-Oxadiazoles and thiazoles are versatile leading molecules for designing potential bioactive agents. The derivatives of these molecules constitute an important family of heterocyclic compounds. Compounds bearing 1,3,4-oxadiazole nucleus are known to exhibit remarkable biological activities such as antimalarial, anticancer, anticonvulsant, and anti-inflammatory [6–12]. Thiazole nucleus is also an integral part of all the available penicillins which have revolutionized the therapy of bacterial diseases [13]. The applications of thiazoles were found in the drug development for the treatment of allergies, hypertension, inflammation, schizophrenia, bacterial, HIV infections, hypnotics, and so forth [14]. Free radicals such as superoxide, hydroxyl, and nitric oxide are the oxygen centered free radicals, and they are also called reactive oxygen species (ROS). They are generated in the human body and would cause damage to lipids, proteins, and DNA and thus may lead to various diseases such as carcinogenesis, drug-associated toxicity, and inflammation. Furthermore, radical reactions play a significant role in the development of life limiting
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