Renewal of planktonic foraminifera diversity after the Cretaceous Paleogene mass extinction by benthic colonizers Planktonic foraminifera are key to understanding paleoclimate and plankton evolution, but their origins are unclear. Here, the authors use a molecular clock to suggest that benthic foraminifera di...
When 0.01 <Kn< 1 orλ<dp<100λand in case of mass transfer of a single species (e.g., water vapor) under imposedpressure gradienton the membrane, the resistance caused by molecular–molecular collisioncan be neglected, and in this case bothKnudsen diffusionandPoiseuille flowhave a noticeable...
Growing concern has arisen from the quasi-exponential increase in the numbers and quantities of man-made chemicals that presently are in current use, and their potential effects on human health, especially their delayed effects on degenerative diseases s
This is generally believed to be the process through which stars in regions of low-mass star formation begin their life, the “standard model” of star formation (Shu et al., 1987). (Low-mass stars have masses no more than a few times that of the Sun; high-mass stars have masses ...
Barakat AO, Rullkötter J (2005) Gas chromatographic/mass spectrometric analysis of cembrenoid diterpenes in kerogen from a lacustrine sediment. Org Mass Spectrom 28:157 Google Scholar van Aarssen BGK, Kruk C, Hessels JKC, de Leeuw JW (1990) cis-cis-trans-Bicadinane, an uncommon triterpa...
In this study, time-course changes of molecular-level compositions of DOM in Lake Inba by KMnO_4 oxidation were evaluated by Orbitrap mass spectrometry (Orbitrap MS). Water samples were collected from Lake Inba in September, 2016. After filtrating, they were oxidized with KMnO_4 at 95掳C ...
Naively assuming a Galactic conversion factor, this places a limit of around 4×10Mon the mass of molecular hydrogen, which is similar to the stellar mass of a present-day giant galaxy, and consistent with gas-to-dust ratios as high as 4400. 展开 ...
In particular, young, highly embedded objects that have only accreted a small fraction of their mass have a shallower gravitational well from which to extract energy and may have much lower outflow velocities than their more evolved counterparts26. As the driving source of HH 211 is believed to...
1996). Cytokines are not only responsible for autocrine and paracrine signaling within the myocardium but also for endocrine signaling throughout the body, especially affecting striated muscle mass through the induction of muscle wasting and cachexia. Transforming growth factor signaling and alterations to...
(31) mass spectrometric and immunoblotting analyses indicate that this kinase sample has no significant phosphorylation at the known (auto)phosphorylation sites (including Ser-78, Ser-359, Ser-366, Ser-377, Ser-396, Ser-398, Ser-445, Ser-474, and Ser-500) while having ∼80–90% of ...