The laboratory millimeter and submillimeter spectrum of HCO

The rotational absorption frequencies of 68 new lines from the HCO radical in its ground electronic state have been measured in the millimeter and submillimeter spectral region. The large zero-field data set acquired has allowed the complex spectrum of this light asymmetric rotor with unpaired electronic spin and magnetic hyperfine interactions to be completely analyzed to within experimental accuracy (<0.1 MHz) for the first time. The wide range of states observed provides a highly accurate map of the rotational frequencies of the formyl radical, which should enable the abundance and excitation of interstellar HCO to be examined in detail

The Millimeter- and Submillimeter-Wave Spectrum of Ethylene Oxide (c-C2H4O)

The cyclic molecule ethylene oxide (c-C_2 H_4 O) has recently been detected in the interstellar source Sgr B2N. Previous laboratory work on the rotational spectrum of this molecule extends only to a frequency of 123 GHz. We report here the extension of the laboratory rotational spectrum of this species through the frequency range 262-358 GHz using a new fast scan spectrometer (FASSST). The newly measured lines have been combined with previous data at lower frequencies to form a data set consisting of 662 lines that has been assigned and fitted via a standard semirigid asymmetric top analysis. The spectral constants obtained from the fit have allowed us to predict the frequencies of many additional lines

Synthesis of Single Phase Hg-1223 High Tc Superconducting Films With Multistep Electrolytic Process

We report the multistep electrolytic process for the synthesis of high Tc single phase HgBa2Ca2Cu3O8+&#61540; (Hg-1223) superconducting films. The process includes : i) deposition of BaCaCu precursor alloy, ii) oxidation of BaCaCu films, iii) electrolytic intercalation of Hg in precursor BaCaCuO films and iv) electrochemical oxidation and annealing of Hg-intercalated BaCaCuO films to convert into Hg1Ba2Ca2Cu3O8+&#61540; (Hg-1223). Films were characterized by thermo-gravimetric analysis (TGA) and differential thermal analysis (DTA), X-ray diffraction (XRD) and scanning electron microscopy (SEM). The electrolytic intercalation of Hg in BaCaCuO precursor is proved to be a novel alternative to high temperature-high pressure mercuration process. The films are single phase Hg-1223 with Tc = 121.5 K and Jc = 4.3 x 104 A/cm2.Comment: 17 Pages, 10 Figures. Submitted to Superconductor Science and Technolog

The Wild Genepool of Pigeonpea at ICRISAT Genebank - Status and Distribution

Wild pigeonpea genepool is a promising source for various biotic and abiotic stress resistances, and important agronomic and nutritional traits. The genebank at ICRISAT, Patancheru, India, conserves 13,771 accessions of pigeonpea from 74 countries, including 555 accessions of wild relatives belonging to 66 species of six genera from 41 countries. Out of 11 genera now recognized in Cajaninae, only six are available at ICRISAT genebank. Of the 32 species recognized in genus Cajanus, ICRISAT genebank holds a total of 213 accessions of 19 species and C. scarabaeoides has largest number of accessions (102 accessions). Genebank has 303 accessions of genus Rhynchosia represented by 33 species and largely represented by R. minima (186 accessions). Genus Paracalyx has two accessions of one species; genus Dunbaria has 12 accessions of two species; genus Eriosema has seven accessions of three species and genus Flemingia is represented by 18 accessions of eight specie

Identification of photoperiod insensitive sources in the world collection of pigeonpea at ICRISAT

The world collection of cultivated pigeonpea germplasm (13 077 accessions) assembled at the International Crops Research Institute for the Semi-Arid Tropics (ICRISAT) genebank from 74 countries originating from a wide range of environments may include highly photoperiod sensitive to insensitive accessions. Screening of these germplasm accessions for their response to photoperiod is very important for well-targeted use in crop improvement. As part of characterization of germplasm, a total of 10 390 cultivated pigeonpea accessions were screened for their response to photoperiod at ICRISAT, Patancheru, Andhra Pradesh, India during 1977/78 to 1988/89. Insensitive or less sensitive accessions were identified after three cycles

Cajanus genepool at ICRISAT genebank

1. Pigeonpea (Cajanus cajan (L.) Millsp. is an important grain legume crop of the tropics and subtropics. 2. It is an excellent source of protein, minerals and vitamins and has multiple uses such as food, feed, fuel, fencing, roofing, basket making and as a soil enricher and soil binder. 3. ICRISAT genebank holds the world’s largest collection of 13,632 pigeonpea germplasm accessions from 74 countries including 555 accessions of wild relatives belonging to 67 species of 6 genera. ..

Astrophysical S_{17}(0) factor from a measurement of d(7Be,8B)n reaction at E_{c.m.} = 4.5 MeV

Angular distribution measurements of $^2$H($^7$Be,$^7$Be)$^2$H and $^2$H($^7$Be,$^8$B)$n$ reactions at $E_{c.m.}\sim$~4.5 MeV were performed to extract the astrophysical $S_{17}(0)$ factor using the asymptotic normalization coefficient (ANC) method. For this purpose a pure, low emittance $^7$Be beam was separated from the primary $^7$Li beam by a recoil mass spectrometer operated in a novel mode. A beam stopper at 0$^{\circ}$ allowed the use of a higher $^7$Be beam intensity. Measurement of the elastic scattering in the entrance channel using kinematic coincidence, facilitated the determination of the optical model parameters needed for the analysis of the transfer data. The present measurement significantly reduces errors in the extracted $^7$Be(p,$\gamma$) cross section using the ANC method. We get $S_{17}$~(0)~=~20.7~$\pm$~2.4 eV~b.Comment: 15 pages including 3 eps figures, one figure removed and discussions updated. Version to appear in Physical Review

Conservation and Management of Genetic Resources of Sorghum, Pearl millet, Chickpea, Pigeonpea, Groundnut and other Small millets in the ICRISAT Genebank

ICRISAT operates as a system of genebanks with a main genebank located in Patancheru, (India) and other 3 genebanks located in Niamey (Niger), Nairobi (Kenya) and Bulawayo (Zimbabwe). Each of these genebanks perform all the regular operations and conserve and distribute accessions to users according to their location. In its active collection the ICRISAT genebank at Patancheru holds more than 119,000 accessions of sorghum, groundnut, chickpea, pigeonpea, pearl millet and six other small millets (finger millet, foxtail millet, barnyard millet, kodo millet, little millet and proso millet). In total the genebank conserves accession of 11 different crops that represent 70 – 80% of the available diversity (Upadhyaya et al. 2008). Additionally, accessions of groundnut and pearl millet are also stored at Niamey, accession of sorghum and pearl millet at Bulawayo, and accessions of sorghum, pigeon pea and chickpea at the Nairobi genebank (Koo et al. 2004). In this evaluation we have evaluated only the Patancheru genebank and the main genetic materials conserved in its facilities. 11 The only previous cost evaluation of the ICRISAT genebank corresponds to the work of Koo et al. (2004) that also concentrated on the accessions kept at Patancher