Results 91 to 100 of about 211,511 (236)

Topology‐based Visual Analysis of Hydrothermal Plumes

Computer Graphics Forum, EarlyView.
Abstract Hydrothermal plumes are turbulent structures of intense heat and mineral smoke that rise and disperse into the deep ocean. Existing models generally characterize these systems as a single axisymmetric plume originating from a point source. However, this assumption breaks down in weakly venting, spatially distributed systems, where low‐flux ...
Adhitya Kamakshidasan, Tushar Jain, Karen Bemis, Valerio Pascucci   +3 more
wiley   +1 more source

A distinct gene expression mechanism for d‐amino acid utilization in hyperthermophilic archaeon Pyrococcus horikoshii

The FEBS Journal, EarlyView.
The genes PH0137, PH0138, and PH0140 form a cluster in the genome of Pyrococcus horikoshii. The PH0140 gene encodes a transcription factor identified as a d‐amino acid‐responsive regulatory protein (DARP). In feast mode, l‐Ile‐bound DARP binds to the promoter and represses transcription of PH0137 and PH0138. In famine mode, DARP binds to d‐allo‐Ile and
Ryushi Kawakami, Tomoki Kawase, Taira Uehara, Haruhiko Sakuraba, Tomohiko Matsuzawa, Junji Hayashi, Toshihisa Ohshima   +6 more
wiley   +1 more source

Prebiotic aqueous reactions catalyzed by native nickel without hydrogen

The FEBS Journal, EarlyView.
Serpentinizing (H2‐producing) hydrothermal vents are candidate environments for metabolic origin. They generate highly reducing conditions that convert CO2 to formate and methane in abiotic reactions resembling reactions of the acetyl‐CoA pathway of CO2 fixation. They also contain natural catalysts. Native nickel (Ni0), like Fe0, Co0, and their alloys,
Carolina Garcia Garcia, Max Brabender, William F. Martin   +2 more
wiley   +1 more source

Hydrothermal origin of metabolic phosphorylation

The FEBS Journal, EarlyView.
Serpentinizing hydrothermal vents are candidate sites for biochemical origins. They generate extremely reducing conditions, depositing phosphite (HPO32−) and transition metals, including palladium, in the native (zero‐valent) state. Schlikker et al.
Manon L. Schlikker, Nadja K. Hoffmann, Sabine Metzger, Jorge Moral‐Pombo, Harun Tüysüz, William F. Martin   +5 more
wiley   +1 more source

Toward a minimal amino acid alphabet for protein design

The FEBS Journal, EarlyView.
Proteins are built from 20 canonical amino acids; however, it is interesting to investigate whether they can also be formed from reduced amino acid alphabets. Using protein design, we designed proteins based on all alphabets comprising 2 to 10 ‘early’ amino acids (those likely to have been present before the origin of life).
Karel Půbal, Kseniia Kushnir, Vojtěch Spiwok, Karolína Loužecká, Vladimír Setnička, Petra Lipovová   +5 more
wiley   +1 more source

Fluid ingress and surface wettability of 3D‐printed closed‐hollow obturator specimens across material types and printing orientations

Journal of Prosthodontics, EarlyView.
Abstract Purpose To evaluate the effects of material type, printing orientation, and thermocycling on cumulative fluid ingress in three‐dimensional (3D)‐printed closed‐hollow obturator specimens and to compare water contact angle among material–printing orientation groups.
Wisarut Prawatvatchara, Soranun Chantarangsu, Somphote Angkanawiriyarak, Raiwint Khunwisetkul, Kwanwong Boonpitak, Visaluk Punyawattananon, Cheewin Towithelertkul   +6 more
wiley   +1 more source

Effect of access‐opening closure materials on fluid‐related mass gain and volumetric change in three‐dimensionally printed closed‐hollow obturator specimens

Journal of Prosthodontics, EarlyView.
Abstract Purpose To investigate how denture base resin and access‐opening closure material affect fluid‐related mass gain and micro‐computed tomography‐derived volumetric changes in three‐dimensionally printed closed‐hollow obturator specimens. Materials and Methods Specimens were printed from NextDent Denture 3D+ or Apex Base resin.
Wisarut Prawatvatchara, Soranun Chantarangsu, Raiwint Khunwisetkul, Visaluk Punyawattananon, Cheewin Towithelertkul, Murali Srinivasan, Dusit Nantanapiboon   +6 more
wiley   +1 more source

LTR-retrotransposons in R. exoculata and other crustaceans [PDF]

, 2013
Transposable elements are major constituents of eukaryote genomes and have a great impact on genome structure and stability. They can contribute to the genetic diversity and evolution of organisms. Knowledge of their distribution among several genomes is
Graça, Paula, Bonnivard, Eric, Esnault, Caroline, Donnart, Tifenn, Piednoël, Mathieu, Higuet, Dominique   +5 more
core   +1 more source

The Role of Oxidative Stress in Periodontitis

Journal of Periodontal Research, EarlyView.
Oxidative stress is involved in multiple chemical reactions that take place in different intracellular organelles: mitochondria, rough endoplasmic reticulum, peroxisomes, autophagy, and aging, and can be influenced by exogenous factors: nutrition, physical activity, psychological status, environmental conditions, microbiome, and drugs.
Pedro Bullon, Francesca Giampieri, Beatriz Bullon, Maurizio Battino   +3 more
wiley   +1 more source

Morphological adaptations to chronic hypoxia in deep-sea decapod crustaceans from hydrothermal vents and cold seeps [PDF]

, 2010
Animals inhabiting hydrothermal vents and cold seeps face conditions that are challenging for survival. In particular these two habitats are characterized by chronic hypoxia, sometimes reaching complete anoxia.
Decelle, Johan, Hourdez, Stéphane, Andersen, Ann   +2 more
core   +1 more source