Results 41 to 50 of about 8,229,253 (288)

Spatial dynamics of homochiralization [PDF]

, 2005
The emergence and spreading of chirality on the early Earth is considered by studying a set of reaction-diffusion equations based on a polymerization model.
Brandenburg, Axel, Multamaki, Tuomas
core   +2 more sources

New observation on Corynetis from the early Cambrian Guanshan Biota reflect burrowing life

Royal Society Open Science
Priapulids demonstrated greater disparity among anatomical morphology and played a pivotal role in early Cambrian marine ecosystems. This disparity appeared in ornamented cuticle and showed adaptability to diverse ecological patterns, which lack detailed
Chunxiao Liu, Jianni Liu
doaj   +1 more source

Vitalistic Approaches to Life in Early Modern England [PDF]

, 2015
Vitalism has been given different definitions and diverse figures have been labelled as vitalists throughout the history of ideas. Concentrating on the seventeenth century, we find that scholars identify as vitalists authors who endorse notions that are ...
Szanto, Veronika
core  

Sirolimus for Extracranial Arteriovenous Malformations: A Scoping Review of the Evidence in Syndromic and Non‐Syndromic Cases

Pediatric Blood &Cancer, EarlyView.
ABSTRACT Arteriovenous malformations (AVMs) are rare, high‐flow, vascular anomalies that can occur either sporadically or as part of a genetic syndrome. AVMs can progress with serious morbidity and even mortality if left unchecked. Sirolimus is an mTOR inhibitor that is effective in low‐flow vascular malformations; however, its role in AVMs is unclear.
Will Swansson, Ingrid Winship, Gary Hammerschlag, Laura Scardamaglia   +3 more
wiley   +1 more source

Unveiling the early evolution of black corals

Communications Biology
Black corals, primarily deep-sea cnidarians (Anthozoa: Antipatharia), are inferred to have originated either in the Ediacaran or Cambrian based on molecular clock estimates.
Wenjing Hao, Jian Han, Andrzej Baliński, Mercer R. Brugler, Deng Wang, Xin Wang, Bernhard Ruthensteiner, Tsuyoshi Komiya, Jie Sun, Yuanyuan Yong, Xikun Song   +10 more
doaj   +1 more source

Influencing Factors of Hydrocarbon Migration and Adjustment at the Edge of a Stable Cratonic Basin: Implications from Fluid Inclusions, Quantitative Fluorescence Techniques, and Geochemical Tracing

Energies
Understanding the mechanisms of hydrocarbon migration, accumulation, and alteration, particularly how evolution controls these processes, is critical for exploring lithologic hydrocarbons in reservoirs. In the complex tectonic settings of the continental
Zhengqi Yang, Xin Cheng, Siqi Ouyang, Zhe Liu, Yuting Cheng, Shuqi Lan, Lei Xue, Ting Zhang, Yiqian Qu   +8 more
doaj   +1 more source

A fresh look at the Hyolithid Doliutheca from the Early Cambrian (Stage 4) Shipai Formation of the Three Gorges Area, Hubei, South China

Biology, 2022
New hyolith specimens from the early Cambrian (Stage 4) of the Three Gorges area, western Hubei Province are described and assigned to the species Doliutheca orientalis.
Fan Liu, Christian B. Skovsted, Timothy P. Topper, Zhifei Zhang   +3 more
doaj   +1 more source

Outcomes of Live Virus Vaccination in Patients With Vascular Anomalies Being Treated With Sirolimus

Pediatric Blood &Cancer, EarlyView.
ABSTRACT Background Live vaccination in patients with vascular anomalies (VA) receiving sirolimus remains controversial due to immunosuppressive effects and theoretical risks. Procedure This single‐center retrospective study included patients with VA less than 4 years old at the start of sirolimus therapy who were incompletely vaccinated.
Svatava Merkle, Kiersten Ricci, Kelly Blache, Rebecca A. Marsh, Adrienne M. Hammill, Elissa Engel   +5 more
wiley   +1 more source

Characteristics of effective helium source rocks and releasing mechanism of helium

Journal of Natural Gas Geoscience
Different helium source rocks exhibit varying characteristics, including differences in the content and occurrence states of precursor elements such as uranium (U) and thorium (Th).
Xiaofeng Wang, Dong Zhao, Dongdong Zhang, Xiaofu Li, Keyu Chen, Wenhui Liu   +5 more
doaj   +1 more source

Tube-dwelling in early animals exemplified by Cambrian scalidophoran worms

BMC Biology, 2021
Background The radiation of ecdysozoans (moulting animals) during the Cambrian gave rise to panarthropods and various groups of worms including scalidophorans, which played an important role in the elaboration of early marine ecosystems.
Deng Wang, Jean Vannier, Cédric Aria, Jie Sun, Jian Han   +4 more
doaj   +1 more source