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PublicationArticle A new indole alkaloid from Alstonia scholaris(2009) Luna Jain; M.B. Pandey; Sarita Singh; A.K. Singh; V.B. PandeyA new indole alkaloid, N-formylscholarine, together with picrinine, strictamine and nareline has been isolated from the fruit pods of Alstonia scholaris, and their structures were established by various spectral data. This is the first report of these alkaloids in A. scholaris fruit pods. © 2009 Taylor & Francis.PublicationArticle Electrical properties of Se93-x-Zn2-Te5-Inx chalcogenide glasses(S.C. Virtual Company of Phisics S.R.L, 2009) A.K. Singh; N. Mehta; K. SinghElectrical properties of Se93-xZn2Te5Inx (X= 0, 2, 4, 6 and10) chalcogenide glasses have been carried out at room temperature. I-V characteristic of the present glasses were recorded upto 200V. A drastic I-V characteristic change have been observed between 160 to 200V for 4, 6, 10 at % of indium glasses. The electrical conductivity, ln(I) vs V1/2 characteristics and electrical conductivity vs average coordination number parameter of present glasses have been also determined, which extensively varied with indium concentration.PublicationConference Paper The CBM Collaboration(Elsevier, 2009) N. Abel; J. Adamczewski; D. Adamova; M.M. Aggarwal; N. Ahmad; Z. Ahmad; A. Akindinov; P. Akishin; E. Akishina; T. Akishina; M. Al-Turany; M. Alyushin; S. Amar-Youcef; V. Ammosov; M. Andelić; C. Andrei; A. Andronic; Yu. Anisimov; K. Antipin; H. Appelshäuser; A. Arefiev; T. Armbruster; A. Artamonov; E. Atkin; M.D. Azmi; P.V.K.S. Baba; E. Badura; S. Baginyan; S. Bandyopadhyay; N. Baranova; G. Bashindzhagyan; Z. Basrak; V. Baublis; S. Belogurov; I. Berceanu; E. Berdermann; A. Berdnikov; Y. Berdnikov; R. Berendes; C. Bergmann; D. Bertini; C. Besliu; O. Bezshyyko; P. Bhaduri; A. Bhasin; A.K. Bhati; B. Bhattacharjee; A. Bhattacharya; Y. Bocharov; M. Bogolyubsky; L. Boldizsar; N. Bondar; M. Borysova; S. Böttger; P. Braun-Munzinger; U. Brüning; J. Brzychczyk; A. Bubak; R. Čaplar; Xu Cai; M. Calin; G. Caragheorgheopol; I. Carević; V. Cǎtǎnescu; A. Chakraborti; S. Chatterji; Subhasis Chattopadhyay; Sukalyan Chattopadhyay; Sanatan Chattopadhyay; A. Chaus; Hongfang Chen; Jianping Cheng; V. Chepurnov; S. Chernenko; A. Chernogorov; M. Chubarov; M. Ciobanu; G. Claus; V. Covlea; D. Cozma; M. Csanád; N. D'Ascenzo; D. Das; I. Das; V. Davkov; K. Davkov; M. De; R. De; B. Debnath; E. Denes; Zhi Deng; O. Denisova; H. Deppe; I. Deppner; A. Dermenev; M. Deveaux; M. Dey; A. Dorokhov; C. Dritsa; A. Dubey; W. Dulinski; A.K. Dutt-Mazumdar; T. Dutta; D. Dutta; M.R. DuttaMajumdar; V. Dyatchenko; M. Dželalija; H. Engel; T. Esanu; J. Eschke; H. Essel; O. Fateev; R. Ferreira Marques; P. Fischer; H. Flemming; Z. Fodor; P. Fonte; I. Fröhlich; H. Fröning; V. Friese; E. Futo; I. Gašparić; J. Gajda; T. Galatyuk; V. Galkin; A. Galkin; G. Gangopadhyay; Wenxue Gao; C. Garabatos; P. Gasik; J. Gebelein; P. Ghosh; Yu. Gilitsky; V. Golovatyuk; S. Golovnya; V. Golovtsov; M. Golubeva; D. Golubkov; A. Golutvin; D. González-Díaz; S. Gorbunov; S. Gorokhov; D. Gottschalk; Ju. Gousakov; E. Grosse; P. Gryboś; A. Grzeszczuk; F. Guber; A. Gumenuik; A. Gupta; M. Hartig; K. Heidel; N. Heine; A. Herghelegiu; N. Herrmann; J. Heuser; A. Himmi; C. Höhne; R. Holzmann; Byungsik Hong; J. Hutsch; A. Ierusalimov; S. Igolkin; I. Ilyushenko; Tae Im Kang; M. Irfan; Valery Ivanov; V. Ivanov; Victor Ivanov; A. Ivashkin; K. Jaaskelainen; V. Jakovlev; A. Jinaru; A. Jipa; M. Kachel; I. Kadenko; H. Kalita; B. Kämpfer; V. Karasev; O. Karavichev; T. Karavicheva; D. Karmanov; E. Karpechev; E.M. Kashif; K. Kasinski; Manjit Kaur; A. Kazantsev; U. Kebschull; J. Kecskemeti; G. Kekelidze; M.M. Khan; S.A. Khan; A. Khanzadeev; Yu. Kharlov; F. Khasanov; M. Kiš; Junghan Kim; M. Kirejczyk; I. Kisel; S. Kiselev; A. Kiseleva; T. Kiss; A. Kiss; Ch. Klein-Bøsing; M. Klein-Bøsing; V. Kleipa; A. Kluev; K. Koch; P. Koczoń; B. Kolb; B. Komkov; D. Konstantinov; P. Korobchuk; M. Korolev; I. Korolko; N. Korotkova; R. Kotte; A. Kotynia; A. Kovalchuk; S. Kowalski; M. Koziel; M. Krauze; C. Kreidel; D. Kresan; E. Kryshen; L. Kudin; I. Kudryashov; A. Kugel; A. Kugler; A. Kurepin; S. Løchner; V. Ladygin; C. Lara; S. Lashaev; A. Laszlo; I. Lazanu; A. Lebedev; S. Lebedev; Hayoung Lee; F. Lemke; Cheng Li; Yuanjing Li; Yulan Li; Jin Li; V. Lindenstruth; S. Linev; E. Litvinenko; I. Lobanov; E. Lobanova; P. Loizeau; V. Lucenko; A. Lymanets; A. Maevskaya; D.P. Mahapatra; V. Maiatski; P. Maj; Z. Majka; A. Malakhov; O. Malyatina; A. Mangiarotti; J. Manjavidze; V. Manko; R. Männer; S. Manz; T. Matulewicz; E. Matyushevskiy; A. Melnik; M. Merkin; V. Mialkovski; K. Mikhailov; V. Militsija; M.F. Mir; B. Mohanty; W.F.J. Müller; S. Müller-Klieser; C. Müntz; Y. Murin; G.S.N. Murthy; A. Nadtochii; L. Naumann; T. Nayak; W. Niebur; V. Nikulin; M. Nüssle; Y. Onishchuk; G. Ososkov; D. Ossetski; L. Pal; S. Pal; S. Pal; Ya. Panasenko; I. Peric; D. Peshekhonov; V. Peshekhonov; I. Peshenichnov; V. Petráček; M. Petriş; M. Petrovici; A. Petrovici; A. Petrovskiy; K. Piasecki; E. Plekhanov; V. Plujko; A. Poliakov; P. Polozov; A. Pop; V. Popov; V. Pospisil; V. Pozdniakov; A. Prakash; M. Prokudin; V. Pugatch; D. Røhrich; F. Rami; R. Raniwala; S. Raniwala; A. Raportirenko; V. Rasin; A. Reshetin; Y. Riabov; O. Rogachevsky; E. Rostchin; I. Rostovtseva; A. Roy; P. Roy; J. Rozynek; A. Ryazantsev; V. Rykalin; M. Ryzhinskiy; A. Sadovsky; S. Sadovsky; P.K. Sahu; Y. Saini; S.S. Sambyal; V. Samsonov; Min Sang Ryu; V. Saveliev; C. Schiaua; C.J. Schmidt; C. Schrader; K. Schweda; A. Scurtu; S. Seddiki; D. Seliverstov; A. Semak; A. Semennikov; P. Senger; Ming Shao; G. Sharkov; V. Shevchenko; B. Sikora; A. Silaev; Kwang-Souk Sim; A. Simakov; R.N. Singaraju; V. Singh; C.P. Singh; B.K. Singh; A.K. Singh; V. Singhal; T. Sinha; K. Siwek-Wilczynska; L. Skoda; A. Soldatov; L. Solin; H.K. Soltveit; Cs. Soos; Y. Sorokin; P. Staszel; A. Stavinskiy; C. Steinle; E. Stephan; P. Stolpovsky; D. Storozhyk; H. Ströbele; M. Strikhanov; J. Stroth; Yongjie Sun; Y. Sviridov; R. Szczygieł; Zebo Tang; O. Tarassenkova; V. Tiflov; P. Tlusty; T. Tolyhi; N. Topil'skaya; O. Torheim; P. Trivedy; Yu. Tsyupa; F. Uhlig; M. Ukhanov; K. Ullaland; G.B. Vakil; I. Valin; I. Vassiliev; S. Velica; G. Vesztergombi; V. Victorov; Y.P. Viyogi; Y. Volkov; S. Volkov; A. Vorobiev; A. Voronin; E. Vznuzdaev; Yaping Wang; Xiaolian Wang; Yi Wang; C. Wendisch; J. Wessels; A. Wilk; M. Winter; K. Wisniewski; A. Wurz; J. Wüstenfeld; Chuncheng Xu; Jun-Gyu Yi; Zhongbao Yin; In-Kwon Yoo; Qian Yue; I. Yushmanov; V. Zaets; Y. Zaitsev; Yu. Zanevsky; P. Zelnicek; M. Zhalov; Ziping Zhang; Yapeng Zhang; Daicui Zhou; Xianglei Zhu; A. Zinchenko; W. Zipper; M. Zoła̧dź; P. Zrelov; V. Zrjuev[No abstract available]PublicationArticle Characteristics of discrete VLF falling-tone chorus emissions observed at low latitude ground station Jammu(Springer Berlin, 2009) Ashutosh K. Singh; R.P. Patel; R. Singh; K.K. Singh; A.K. SinghThe discrete VLF chorus emissions recorded at low latitude ground station Jammu (geomag. lat. = 22°26′N, L = 1.17) are reported and their characteristics based on spectral analysis have been carried out. These discrete chorus emissions are falling tone emissions which are rarely observed at low latitude ground stations. These discrete chorus emissions are generated during a strong geomagnetic storm period of 2-7 May, 1998. We have computed the frequency sweep rate, repetition period and source region of the individual chorus elements. It is observed that the sweep rate increases with time. Copyright © The Society of Geomagnetism and Earth.PublicationArticle Electrical properties of Se-Zn-In chalcogenide glasses(2009) A.K. Singh; N. Mehta; K. SinghaElectrical measurements of Se98XZn2InX (X = 0, 2, 4, 6 and 10) chalcogenide glasses have been carried out at room temperature. I-V characteristic of the present glasses were recorded upto 200 V.A drastic changes in I-V characteristic have been observed between 180 to 200 V for 4, 6, 10 at% of indium. The composition dependence of electrical conductivity is also discussed. © EDP Sciences.PublicationArticle Variation of ionospheric total electron content in Indian low latitude region of the equatorial anomaly during May 2007-April 2008(Elsevier Ltd, 2009) Sanjay Kumar; A.K. SinghThe ionospheric total electron content (TEC), derived by analyzing dual frequency signals from the Global Positioning System (GPS) recorded near the Indian equatorial anomaly region, Varanasi (geomagnetic latitude 14°, 55′N, geomagnetic longitude 154°E) is studied. Specifically, we studied monthly, seasonal and annual variations as well as solar and geomagnetic effects on the equatorial ionospheric anomaly (EIA) during the solar minimum period from May 2007 to April 2008. It is found that the daily maximum TEC near equatorial anomaly crest yield their maximum values during the equinox months and their minimum values during the summer. Using monthly averaged peak magnitude of TEC, a clear semiannual variation is seen with two maxima occurring in both spring and autumn. Statistical studies indicate that the variation of EIA crest in TEC is poorly correlated with Dst-index (r = -0.03) but correlated well with Kp-index (r = 0.82). The EIA crest in TEC is found to be more developed around 12:30 LT. © 2009 COSPAR.PublicationArticle Characteristics of low latitude ionospheric E-region irregularities linked with daytime VHF scintillations measured from Varanasi(2009) K. Patel; A.K. Singh; R.P. Patel; R.P. SinghVHF amplitude scintillations recorded during the daytime period from January 1991 to December 1993, April 1998 to December 1999 and January 2008 to December 2008 at low latitude station Varanasi (geographic lat. = 25°15′N; long. = 82°59′E; geomagnetic lat. = 14°55′N, long. = 154°E, dip angle = 37.3°, sub-ionospheric dip = 34°) have been analyzed to study the behaviour of ionospheric E-region irregularities during the active solar and magnetic periods. The auto-correlation functions, power spectral densities, signal de-correlation times are computed to study the temporal features of ionospheric E-region irregularities linked with daytime scintillations. Derived spectral index ranges between -2 and -9. Assuming velocity of irregularities, the characteristic lengths of the E-region irregularities are estimated. We have estimated the minimum and maximum range of scale length of sporadic-E (Es) irregularities to be observed over Varanasi. These results are in close agreement with those reported from this latitude region. © Indian Academy of Sciences. © Indian Academy of Sciences.PublicationArticle A study on carbohydrate moieties of gills and air-breathing organs of the walking catfish Clarias batrachus (Linn.) following exposure to arsenic(2009) A.K. Singh; T.K. BanerjeeThe chronic sublethal (1 ppm) effects of an arsenic (As) salt, disodium arsenate heptahydrate (DSA) was examined on the carbohydrate moieties of the gills and air-breathing organs (ABO) of the walking catfish Clarias batrachus Linn. The glycogen content increased quantitatively in the gills during initial stages followed by a decrease after 7 days and throughout treatment. The fall was significant after 30-45 days exposure. This was also accompanied by an increase followed by a decrease in mucogenic activity of the gills. Glycoproteins (GPs) along with the mucous cells stained strongly for carboxylic groups and O-sulfated esters. Unlike the gills, the air-breathing organs showed an increase in glycogen content that surpassed the level of untreated control fish after prolonged exposure. The data indicate that As disturbed aerial respiration after chronic exposure. Mucogenic activity in the air-breathing organs fell markedly and always remained below the level of untreated control fish. Similar to the gills, the air-breathing organs also showed a strong affinity for GPs containing carboxylic groups and O-sulfated esters. © 2009 Taylor & Francis.PublicationArticle Variability in quality components of RILs in chilli (Capsicum annuum L.)(International Society for Horticultural Science, 2009) J. Pandey; J. Singh; A. Verma; A.K. Singh; M. Rai; A.K. Pandey; S. KumarThirty chilli (Capsicum annuum L.) RILs (recombinant inbred lines) families were originated from a cross between California Wonder (non-pungent) and LCA- 235 (pungent), screened for quality traits capsaicin, oleoresin, extractable colour and colour value. The analyses of variance revealed significant differences between the genotypes for all the quality traits analyzed. Significant variations were recorded for all the parameters in the tested RILs families. The capsaicin content ranged from 0.05 to 0.34%, whereas the oleoresin content ranged from 7.60 to 14.20%. Extractable colour (the standard measurement of colour in the spice industry) ranged from 54.94-324.48 ASTA (American Spice Trade Association). The colour value ranged from 23430 to 132330 c.u.PublicationArticle Evaluation of integrated pest management modules against gram pod borer in chickpea (Cicer arietinum)(2009) A.K. Singh; C.P. Srivastava; Nitin JoshiField experiments were conducted during winter (rabi) 2003-04 and 2004-05 to evaluate the effectiveness of integrated pest management (IPM) modules against gram pod borer, [Helicoverpa armigera (Hüibner)], on chickpea (Cicer arietinum L.). Amongst the various modules evaluated for 2 years on 'BG 256' chickpea in Mirzapur district, Uttar Pradesh, module M 5 (sole crop of chickpea, pheromone traps @ 20/ha, bird perches @ 20/ha, endosulfan 35 EC @ 0.07% a.i. and chlorpyriphos @ 0.05% a.i.), followed by M 2 (sole crop of chickpea, pheromone traps @ 20/ha, bird perches @ 20/ ha, methomyl 40 SP @ 1.0 kg/ha of formulated insecticide and 2 sprays of HaNPV @ 400 LE/ha) were found effective in managing the population of H. armigera. On an average, the grain yields were higher in M 5 (1 382 kg/ha), followed by M 2 (1 196 kg/ha) in comparison to the other modules including farmers' practice. The highest cost : benefit (C : B) ratio was obtained in M 5 (1:5.09), followed by M 4 (1:2.2). Though, least population of natural enemies was recorded in M 5, the module proved superior to other modules in respect of managing pest population and C:B ratio and hence could be utilized by farmers.