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EVIDENCE FOR 1000 km s <sup>-1</sup> MOLECULAR OUTFLOWS IN THE LOCAL ULIRG POPULATION
Chung, Aeree,Yun, Min S.,Naraynan, Gopal,Heyer, Mark,Erickson, Neal R. IOP Publishing 2011 ASTROPHYSICAL JOURNAL LETTERS - Vol.732 No.1
<P>The feedback from galactic outflows is thought to play an important role in shaping the gas content, star formation history, and ultimately the stellar mass function of galaxies. Here we present evidence for massive molecular outflows associated with ultra-luminous infrared galaxies (ULIRGs) in the co-added Redshift Search Receiver (CO)-C-12 (1-0) spectrum. Our stacked spectrum of 27 ULIRGs at z = 0.043-0.11 (nu(rest) = 110-120 GHz) shows broad wings around the CO line with Delta V (FWZI) approximate to 2000 km s(-1). Its integrated line flux accounts for up to 25%+/- 5% of the total CO line luminosity. When interpreted as a massive molecular outflow wind, the associated mechanical energy can be explained by a concentrated starburst with star formation rate (SFR) >= 100 M-circle dot yr(-1), which agrees well with their SFR derived from the FIR luminosity. Using the high signal-to-noise stacked composite spectrum, we also probe (CO)-C-13 and (CN)-C-12 emission in the sample and discuss how the chemical abundance of molecular gas may vary depending on the physical conditions of the nuclear region.</P>
Agrobacterium tumefaciens-Mediated Genetic Transformation: Mechanism and Factors
Nitish Kumar,K.G. Vijayanand,Muppala P. Reddy,Amritpal S. Singh,Subhash Naraynan 강원대학교 산림과학연구소 2009 Journal of Forest Science Vol.25 No.3
Agrobacterium–mediated genetic transformation has been widely used for the production of genetically modified transgenic plants to obtain specific desired traits. Most of the molecular mechanisms that underlie the transformation steps have been well elucidated over the years. However, a few steps, such as nuclear targeting, T-DNA integration, and Agrobacterium-plant proteins involved remain largely obscure and are still under extensive studies. This review describes the major steps involved in the molecular mechanism of Agrobacterium-mediated transformation and provides insight in the recent developments in studies on the Agrobacterium-mediated genetic transformation system. Some factors affecting the transformation efficiency are also briefly discussed.
Agrobacterium tumefaciens-Mediated Genetic Transformation: Mechanism and Factors
Kumar, Nitish,Vijayanand, K.G.,Reddy, Myppala P.,Singh, Amritpal S.,Naraynan, Subhash Institute of Forest Science 2009 Journal of Forest Science Vol.25 No.3
Agrobacterium-mediated genetic transformation has been widely used for the production of genetically modified transgenic plants to obtain specific desired traits. Most of the molecular mechanisms that underlie the transformation steps have been well elucidated over the years. However, a few steps, such as nuclear targeting, T-DNA integration, and Agrobacterium-plant proteins involved remain largely obscure and are still under extensive studies. This review describes the major steps involved in the molecular mechanism of Agrobacterium-mediated transformation and provides insight in the recent developments in studies on the Agrobacterium-mediated genetic transformation system. Some factors affecting the transformation efficiency are also briefly discussed.
Floral Biology and Flowering Phenology of Jatropha Curcas
Amritpal S. Singh,Mukesh P. Patel,Tanmay K. Patel,D. R. Delvadia,Diwaker R. Patel,Nitish Kumar,Subhash Naraynan,Ranbir S. Fougat 강원대학교 산림과학연구소 2010 Journal of Forest Science Vol.26 No.2
Jatropha curcas is an oil bearing species with multiple uses and considerable economic potential as a biofuel plant. Plant flowering and breeding characteristics are important for us to understand the reproduction of plant populations. The present study describes the floral biology and flowering phenology of J. curcas which is a prerequisite for hybridization program for genetic improvement through conventional breeding. The plant produces flowers in dichasial inflorescences. Normally, the flowers are unisexual, and male and female flowers are produced in the same inflorescence. Only a few male flowers are produced in an inflorescence, and fruits are produced only through pollination between different flowers from the same or different plants. This study includes a description of the inflorescence, flower anatomy of both male and female flowers, female : male ratio, pollen : ovule ratio, flowering phenology, pollen viability, stigma receptivity, comparison of selfing methods and a comparison of geitonogamy and xenogamy. This information may be useful in J. curcas breeding programmes.
Floral Biology and Flowering Phenology of Jatropha Curcas
Singh, Amritpal S.,Patel, Mukesh P.,Patel, Tanmay K.,Delvadia, D.R.,Patel, Diwaker R.,Kumar, Nitish,Naraynan, Subhash,Fougat, Ranbir S. Institute of Forest Science 2010 Journal of Forest Science Vol.26 No.2
Jatropha curcas is an oil bearing species with multiple uses and considerable economic potential as a biofuel plant. Plant flowering and breeding characteristics are important for us to understand the reproduction of plant populations. The present study describes the floral biology and flowering phenology of J. curcas which is a prerequisite for hybridization program for genetic improvement through conventional breeding. The plant produces flowers in dichasial inflorescences. Normally, the flowers are unisexual, and male and female flowers are produced in the same inflorescence. Only a few male flowers are produced in an inflorescence, and fruits are produced only through pollination between different flowers from the same or different plants. This study includes a description of the inflorescence, flower anatomy of both male and female flowers, female : male ratio, pollen : ovule ratio, flowering phenology, pollen viability, stigma receptivity, comparison of selfing methods and a comparison of geitonogamy and xenogamy. This information may be useful in J. curcas breeding programmes.