Results 271 to 280 of about 157,333 (319)
Environmental Microbiology Reports, Volume 17, Issue 2, April 2025.The quorum sensing regulated sRNA Lrs1 participates in the adaptation of Pseudomonas aeruginosa in low iron by downregulating the siderophore pyochelin, the Quorum Sensing system PQS, and its associated virulence factor phenazines. ABSTRACT Iron is an essential nutrient for microbial growth. The opportunistic pathogen Pseudomonas aeruginosa can survive
Dimitra Panagiotopoulou +7 more
wiley +1 more source
Review of asteroid, meteor, and meteorite‐type links
Meteoritics &Planetary Science, Volume 60, Issue 4, Page 928-973, April 2025.Abstract With the goal to determine the origin of our meteorites in the asteroid belt, video and photographic observations of meteors have now tracked 75 meteorite falls. Six years ago, there were just hints that different meteorite types arrived on different orbits, but now, the number of orbits (N) is high enough for distinct patterns to emerge.
Peter Jenniskens +1 more
wiley +1 more source
Evolution of sexual systems and regressive evolution in Riccia
New Phytologist, Volume 246, Issue 2, Page 769-784, April 2025.Summary The genus Riccia is the most speciose of the Marchantiopsida, the complex thalloid liverworts. In contrast to the predicted ancestral liverwort and the majority of extant liverworts that are dioicous, most Riccia species are monoicous. Both the gametophyte and the sporophyte generations have undergone regressive evolution in Riccia, with the ...
Jonathan Levins +13 more
wiley +1 more source
The strength of organ, tissue, and body field effects determines the frequency of all neoplasia
Annals of the New York Academy of Sciences, Volume 1546, Issue 1, Page 11-22, April 2025.Abstract In 1953, Danely Slaughter proposed the concept of field cancerization, or field effect, to explain the development of additional neoplasia of similar type. A recent theory (de Groen, 2022) states that all DNA is exposed to a constant source of damage, resulting in a constant rate of germline and somatic DNA mutations.
Piet C. de Groen
wiley +1 more source
Saline irrigation improves survival of forage sorghum but limits growth and increases toxicity
Plant Biology, Volume 27, Issue 3, Page 401-409, April 2025.Survival and growth of forage sorghum is boosted by irrigating with moderately saline water during droughts, but the concentration of cyanogenic glucoside increases to potentially toxic concentrations. Abstract Moderately saline water has been proposed as a potential irrigation resource for crops such as forage sorghum (Sorghum bicolor × Sorghum ...
E. Fu, H. Myrans, R. M. Gleadow
wiley +1 more source
Plant Pathology, Volume 74, Issue 3, Page 605-640, April 2025.The literature cites many alternative hosts of Phytophthora erythroseptica. However, evidence of host status is often insufficient, thus a polyphasic approach (morphological, molecular, histological and pathogenicity) is required. ABSTRACT Most published studies of Phytophthora erythroseptica, the major causal agent of pink rot of potato, have focused ...
Ronika Thapa +4 more
wiley +1 more source
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Galaxy formation and evolution
Physica Scripta, 1991The presence of high z quasars and radio galaxies tells us that galaxy formation began at z greater than 5, but leaves unanswered the question of when the bulk of galaxies formed. Recent near infrared number counts of galaxies strongly favor a cosmological geometry with q(sub 0) = 0.5 and lambda = 0.
L. Cowie
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Galaxy Formation and Evolution
2009Major steps in our knowledge of high redshift galaxies and quasars were made possible by the synergy between the Hubble Space Telescope (HST) and 8–10 m class optical-near infrared ground-based telescopes. The galaxy samples were built from very deep, pencil-beam surveys with the HST and deep, wider area surveys undertaken with ground-based facilities.
J. Bergeron
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Galaxy Formation and Evolution
Space Science Reviews, 2016In this chapter, we discuss the current status of observational and computational studies on galaxy formation and evolution. In particular, a joint analysis of star-formation rates (SFRs), stellar masses, and metallicities of galaxies throughout cosmic time can shed light on the processes by which galaxies build up their stellar mass and enrich the ...
Kentaro Nagamine +4 more
openaire +2 more sources