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Um enrolamento das fôlhas do fumo de causa genética

. (No prelo).         [ Links ] 2.  Costa, A. S. e R. Forster, Uma suspeita moléstia do vírus do fumo (Nicotiana tabacum L.) semelhante a "leaf-curl", presente no Estado de São Paulo. Jornal de

THE PENROSE EFFECT

EFFECT’ AND NEW VENTURE GROWTH William R. Forster, Lehigh University, USA Edward D. Hess, University of Virginia, USA Principal Topic This study explores how the founders of high potential ventures

THE IMPACT OF REGIONAL HUMAN CAPITAL AND SOCIO-CULTURAL INSTITUTIONS ON THE FUNCTIONAL COMPOSITION OF FOUNDING TEAMS (SUMMARY)

FUNCTIONAL COMPOSITION OF FOUNDING TEAMS Siddharth Vedula, University of Colorado, USA William R. Forster, Lehigh University, USA Jenni M. Dinger, University of Colorado, USA Michael J. Conger, University of

PARTNERSHIPS AND PERFORMANCE: A MIXED-METHODS, LONGITUDINAL STUDY OF FOUNDING PARTNERSHIPS

William R. Forster 0 0 This Summary is brought to you for free and open access by the Entrepreneurship at Babson at Digital Knowledge at Babson. It has been accepted for inclusion in Frontiers of ... ON NEW VENTURE PERFORMANCE William R. Forster, Lehigh University, USA Principal Topic Methods This study extends research on new venture teams and firm performance by examining the effects founding

Flow velocities of Alaskan glaciers

. Larsen AuthorsSearch for Evan W. Burgess in:Nature Research journals • PubMed • Google ScholarSearch for Richard R. Forster in:Nature Research journals • PubMed • Google ScholarSearch for Christopher F

OH and H2O masers in 74 star-forming regions - The FC89 database

Positions and spectra of 1665 MHz OH and 23 235 MHz H2O masers in 74 star-forming regions are presented. This supplement provides an electronic version of the complete VLA database of interstellar masers observed by Forster & Caswell (1989). The fields observed comprise the majority of known interstellar OH and H2O maser associations at galactic longitudes observable from both...

OH and H2O masers in 74 star-forming regions - The FC89 database

Positions and spectra of 1665 MHz OH and 23 235 MHz H2O masers in 74 star-forming regions are presented. This supplement provides an electronic version of the complete VLA database of interstellar masers observed by Forster & Caswell (1989). The fields observed comprise the majority of known interstellar OH and H2O maser associations at galactic longitudes observable from both...

Methanol and hydroxyl maser positions

The Australia Telescope Compact Array has been used to study more than 40 sites of 1.665-GHz hydroxyl masers and 36 sites of 6.668-GHz methanol masers. Maser positions accurate to better than 1 arcsec have been derived. At each maser site both species are commonly present, and comparisons have been made between the methanol and OH. In 28 of the 29 cases where we have accurate...

Water maser emission from southern IRAS sources

We have searched for water maser emission in 112 bright, southern IRAS sources and have detected it in 27 cases. These sources include M-type stars and previously unidentified IRAS objects. The detection rate is discussed with reference to IRAS low-resolution spectral (LRS) class and the (60–25) µm colour index. Water maser emission was detected in three sources which have LRS...

H I aperture synthesis of the southern barred spiral NGC 1313

Aperture synthesis maps have been made of the late-type barred spiral NGC 1313 in the continuum at 1.4 GHz and in the atomic hydrogen line with resolutions of 1 kpc and 16 km s–1. Analysis of the hydrogen distribution and the velocity field indicates that, in addition to the normal emission from a galaxy of this type, there is a tidal interaction in progress between NGC 1313 and...

Characteristics of the H2CO maser emission in Sgr B2

VLA observations of the 5-GHz H2CO maser emission towards Sgr B2, made with high spectral and angular resolution (0.76 km s–1, 1.25 arcsec respectively), show that most of the emission consists of multiple narrow components with velocity halfwidths between 0.6 and 3.0 km s–1. The minimum maser gains range from 0.2 to 60. All five masers are located near OH or H2O masers...

VLA observations of the 4.8-GHz H2CO transition in L1551

The area surrounding IRS 5 in the L1551 molecular cloud has been mapped with the Very Large Array in the 4.8-GHz H2CO line and the adjacent continuum. The line maps show a symmetrical pattern of H2CO absorption centred on IRS 5. This absorption region is close to the CS disc of Kaifu et al. but has a different orientation and shows no evidence of rotation. H2CO emission towards...

A search for H2CO emission towards OH masers

A search for 4.8-GHz H2CO maser emission has been made with the Westerbork Synthesis Radio Telescope in the direction of 19 OH maser sources. No new H2CO masers were detected. Time variability in the known H2CO maser NGC 7538 (IRS1) is reported.

VLBI aperture synthesis observations of 1720-MHz OH in NGC 7538 (IRS1)

The 1720-MHz OH source in NGC 7538 (IRS1) has been observed with four telescopes in the European VLBI network. Aperture synthesis mapping with a beam of 0.03 arcsec shows six discrete maser positions concentrated in an elongated region of size 0.3 × 0.15 arcsec2. The maser emission arises from two groups of unresolved (< 0.02 arcsec) spots, with apparent brightness temperatures...

Westerbork observations of 6-cm H2CO in W3

The distribution of the 4.8-GHz formaldehyde absorption against the continuum sources in the W3 core has been mapped with an angular resolution of 8.2 × 9.3 arcsec2 and a velocity resolution of 1.22km s–1 Opacity variations on a linear scale size of0.2 pc are seen against the continuum source W3A. The opacity enhancements are interpreted as being caused by clumping in the...

OH observations of IRS 1 in NGC 7538

The OH masers associated with IRS 1 in NGC 7538 have been observed with the Very Large Array at a spatial resolution of 1.2 arcsec and a velocity resolution of 0.65 km s−1. At 1720 MHz, two components with radial velocities of – 57.4 and – 59.3 km s−1 are found to lie on the southern edge of the ultracompact H II region. They are separated by 0.24 ± 0.07 arcsec in a direction...

H2CO mapping toward DR21 and W58 (K3 # 50)

We have mapped the distribution of 4.8-GHz H2CO absorption against the galactic H II regions DR21 and W58 (K3#50) with 8 arcsec resolution. Opacity variations on scales less than 18 arcsec (0.2 pc) are seen against the extended continuum emission toward DR21. Extreme variations are observed toward the various radio components in W58. The H2CO equivalent width is 5.2 km s−1 in the...

Aperture synthesis observations of galactic atomic hydrogen in the direction $l=333_{.}^{^{\circ}}5,\,b=-0_{.}^{^{\circ}}3$

Galactic atomic hydrogen has been mapped with the Parkes two-element synthesis telescope (TEST) in the direction $l=333_{.}^{^{\circ}}5,\,b=-0_{.}^{^{\circ}}3$. H I structure on a large angular scale is probed using absorption measurements toward eight compact continuum sources scattered over an area 25 arcmin across. The detailed H I absorption over the extended ( 4 arcmin) H II...

Observations of H2O maser emission in the Large Magellanic Cloud

A search for H2O maser emission towards 10 continuum sources in the Large Magellanic Cloud was made with the Parkes radio telescope (beamwidth 1.7 arcmin). Maser emission was detected near three H II regions, including the 30 Doradus nebula; the positions of the main features were estimated with an accuracy of ± 15 arcsec. The maser luminosities were comparable to the typical...

An H I study of the galaxy NGC 4945 with a two-element synthesis telescope

TEST, a two-element synthesis telescope operating at 1.4 GHz, consists of the Parkes 64-m radio telescope and a movable 18-m antenna. The system has several unconventional features, which are described. TEST has been used for an H I study of the edge-on spiral galaxy NGC 4945; the angular resolution was 47×73 arcsec2. H I absorption and emission are both present in the galaxy...