Disk growth and destruction probed with polarimetry: A link to fundamental disk physics

2012 ◽  
Author(s):  
Alex C. Carciofi
Keyword(s):  
Disk Growth

scholarly journals Millimeter Mapping at z ∼ 1: Dust-obscured Bulge Building and Disk Growth

2019 ◽  
Vol 870 (2) ◽  
pp. 130 ◽  
Author(s):  
Erica J. Nelson ◽  
Ken-ichi Tadaki ◽  
Linda J. Tacconi ◽  
Dieter Lutz ◽  
Natascha M. Förster Schreiber ◽  
...  
Keyword(s):  
Disk Growth

scholarly journals Inositol phosphate kinase 2 is required for imaginal disc development in Drosophila

2015 ◽  
Vol 112 (51) ◽  
pp. 15660-15665 ◽  
Author(s):  
Andrew M. Seeds ◽  
Marco M. Tsui ◽  
Christine Sunu ◽  
Eric P. Spana ◽  
John D. York
Keyword(s):  
Inositol Phosphate ◽  
Fruit Fly ◽  
Imaginal Discs ◽  
Tissue Growth ◽  
Subsequent Formation ◽  
Growth Defects ◽  
Intracellular Messengers ◽  
Stat Signaling ◽  
Disk Growth ◽  
Inositol Phosphate Kinase

Inositol phosphate kinase 2 (Ipk2), also known as IP multikinase IPMK, is an evolutionarily conserved protein that initiates production of inositol phosphate intracellular messengers (IPs), which are critical for regulating nuclear and cytoplasmic processes. Here we report that Ipk2 kinase activity is required for the development of the adult fruit fly epidermis. Ipk2 mutants show impaired development of their imaginal discs, the primordial tissues that form the adult epidermis. Although disk tissue seems to specify normally during early embryogenesis, loss of Ipk2 activity results in increased apoptosis and impairment of proliferation during larval and pupal development. The proliferation defect is in part attributed to a reduction in JAK/STAT signaling, possibly by controlling production or secretion of the pathway’s activating ligand, Unpaired. Constitutive activation of the JAK/STAT pathway downstream of Unpaired partially rescues the disk growth defects in Ipk2 mutants. Thus, IP production is essential for proliferation of the imaginal discs, in part, by regulating JAK/STAT signaling. Our work demonstrates an essential role for Ipk2 in producing inositide messengers required for imaginal disk tissue maturation and subsequent formation of adult body structures and provides molecular insights to signaling pathways involved in tissue growth and stability during development.

scholarly journals Mycoplasma bovis and bacterial pathogens in the bovine respiratory tract

2011 ◽  
Vol 56 (No. 1) ◽  
pp. 29-35 ◽  
Author(s):  
A. Gabinaitiene ◽  
J. Siugzdaite ◽  
H. Zilinskas ◽  
R. Siugzda ◽  
S. Petkevicius
Keyword(s):  
Nasal Cavity ◽  
Pasteurella Multocida ◽  
Histopathological Examination ◽  
Age Groups ◽  
Mannheimia Haemolytica ◽  
Mycoplasma Bovis ◽  
Major Health Problem ◽  
Beef Herds ◽  
Pcr Method ◽  
Disk Growth

Bovine respiratory disease caused by Mycoplasma bovis is a major health problem of cattle worldwide. It inflicts considerable financial losses on beef herds and is the most common cause of mortality in dairy cattle. Bacteriological examination of 35 nasal cavity samples from calves younger than three months of age identified Mycoplasma bovis in eight (22.9%) samples. These cattle were followed until 17 months of age, and repeated examination of nasal cavity samples before necropsy identified Mycoplasma bovis in four (11.4%) samples. At necropsy and lung samples for bacteriological and histological examination were collected. To identify microorganisms from the Mollicutes class isolated from the nasal cavities of cattle we used the PCR method. Furthermore, Mycoplasma bovis was identified on the grounds of biochemical characteristics and by the disk growth inhibition test. The organism was found in 5.7% of calves younger than three months of age in combination with Pasteurella spp. Mycoplasma bovis in combination with Pasteurella multocida and Mannheimia haemolytica was isolated from 5.7% and 2.9% of cattle at 17 months. However, Pasteurella multocida was common in cattle at 17 months and Mannheimia haemolytica was isolated from both age groups of cattle. Histopathological examination of lung samples revealed broncho-interstitial pneumonia in 14.3% of samples. Mycoplasma bovis was isolated from 60.0% of broncho-insterstitial pneumonia cases. The organism was isolated more frequently from the group of calves rather than from the cattle group (P < 0.05). The most common bacterial agents were Pasteurella multocida and Mannheimia haemolytica.

scholarly journals Long-term Variability in Be-Star disks

2000 ◽  
Vol 175 ◽  
pp. 422-434 ◽  
Author(s):  
J.H. Telting
Keyword(s):  
Recent Work ◽  
Be Stars ◽  
X Ray ◽  
Be Star ◽  
Disk Growth ◽  
X Ray Binaries ◽  
Disk Loss

AbstractBe stars can switch between non-disk, gradual disk growth, disk-loss events, and shell-line phases. Many aspects of this Be phenomenon are still not understood. In this paper I review recent work on variability in Be-star disks, divided in four different topics: disk growth (Section 1), long-term V/R variations and global disk oscillations (Section 2), spectacular variations (Section 3), and, concisely, the disk variability in Be/X-ray binaries (Section 4).

scholarly journals OBSERVATIONS OF INFALLING AND ROTATIONAL MOTIONS ON A 1000 AU SCALE AROUND 17 CLASS 0 AND 0/I PROTOSTARS: HINTS OF DISK GROWTH AND MAGNETIC BRAKING?

2015 ◽  
Vol 799 (2) ◽  
pp. 193 ◽  
Author(s):  
Hsi-Wei Yen ◽  
Patrick M. Koch ◽  
Shigehisa Takakuwa ◽  
Paul T. P. Ho ◽  
Nagayoshi Ohashi ◽  
...  
Keyword(s):  
Magnetic Braking ◽  
Rotational Motions ◽  
Disk Growth

scholarly journals ECO AND RESOLVE: GALAXY DISK GROWTH IN ENVIRONMENTAL CONTEXT

2015 ◽  
Vol 812 (2) ◽  
pp. 89 ◽  
Author(s):  
Amanda J. Moffett ◽  
Sheila J. Kannappan ◽  
Andreas A. Berlind ◽  
Kathleen D. Eckert ◽  
David V. Stark ◽  
...  
Keyword(s):  
Environmental Context ◽  
Galaxy Disk ◽  
Disk Growth

scholarly journals Disk growth in bulge-dominated galaxies: molecular gas and morphological evolution

2007 ◽  
Vol 3 (S245) ◽  
pp. 173-176
Author(s):  
Lisa Young ◽  
Martin Bureau ◽  
Alison Crocker ◽  
Francoise Combes
Keyword(s):  
Morphological Evolution ◽  
Stellar Mass ◽  
Young Stars ◽  
Molecular Gas ◽  
Early Type ◽  
Future Studies ◽  
Lenticular Galaxies ◽  
Star Formation Activity ◽  
Disk Growth

AbstractSubstantial numbers of morphologically regular early-type (elliptical and lenticular) galaxies contain molecular gas, and the quantities of gas are probably sufficient to explain recent estimates of the current level of star formation activity. This gas can also be used as a tracer of the processes that drive the evolution of early-type galaxies. For example, in most cases the gas is forming dynamically cold stellar disks with sizes in the range of hundreds of pc to more than one kpc, although there is typically only 1% of the total stellar mass currently available to form young stars. The numbers are still small, but the molecular kinematics indicate that some of the gas probably originated from internal stellar mass loss while some was acquired from outside. Future studies will help to quantify the role of molecular gas (dissipational processes) in the formation of early-type galaxies and their evolution along the red sequence.

scholarly journals DIISC-II: Unveiling the Connections between Star Formation and Interstellar Medium in the Extended Ultraviolet Disk of NGC 3344

2021 ◽  
Vol 923 (2) ◽  
pp. 199
Author(s):  
Mansi Padave ◽  
Sanchayeeta Borthakur ◽  
Hansung B. Gim ◽  
Rolf A. Jansen ◽  
David Thilker ◽  
...  
Keyword(s):  
Star Formation ◽  
Interstellar Medium ◽  
Formation Rate ◽  
Gas Flows ◽  
Metal Line ◽  
Long Time ◽  
Circumgalactic Medium ◽  
Far Ultraviolet ◽  
Disk Growth ◽  
Stellar Complexes

Abstract We present our investigation of the extended ultraviolet (XUV) disk galaxy, NGC 3344, conducted as part of Deciphering the Interplay between the Interstellar medium, Stars, and the Circumgalactic medium survey. We use surface and aperture photometry of individual young stellar complexes to study star formation and its effect on the physical properties of the interstellar medium. We measure the specific star formation rate (sSFR) and find it to increase from 10−10 yr−1 in the inner disk to >10−8 yr−1 in the extended disk. This provides evidence for inside-out disk growth. If these sSFRs are maintained, the XUV disk stellar mass can double in ∼0.5 Gyr, suggesting a burst of star formation. The XUV disk will continue forming stars for a long time due to the high gas depletion times (τ dep). The stellar complexes in the XUV disk have high-ΣH I and low-ΣSFR with τ dep ∼ 10 Gyr, marking the onset of a deviation from the traditional Kennicutt–Schmidt law. We find that both far-ultraviolet (FUV) and a combination of FUV and 24 μm effectively trace star formation in the XUV disk. Hα is weaker in general and prone to stochasticities in the formation of massive stars. Investigation of the circumgalactic medium at 29.5 kpc resulted in the detection of two absorbing systems with metal-line species: the stronger absorption component is consistent with gas flows around the disk, most likely tracing inflow, while the weaker component is likely tracing corotating circumgalactic gas.

scholarly journals Large Area Diamond Disk Growth Experiments and Thermomechanical Investigations for the Broadband Brewster Window in DEMO

2021 ◽  
pp. 1-6
Author(s):  
Gaetano Aiello ◽  
Konstantinos A. Avramidis ◽  
Thomas Franke ◽  
Gerd Gantenbein ◽  
John Jelonnek ◽  
...  
Keyword(s):  
Large Area ◽  
Diamond Disk ◽  
Brewster Window ◽  
Disk Growth ◽  
Growth Experiments
Sign in / Sign up

Export Citation Format

Share Document