Results 81 to 90 of about 3,531,989 (315)

Process Modelling of Chemical Reactors: Zero- versus Multi-dimensional Models [PDF]

Modeling, Identification and Control, 1997
Trends in modelling of flow processes in the chemical reactors are presented. Particular emphasis is given to models that use the multi-dimensional multi-fluid techniques. Examples are given for both gas/liquid as well as gas/particle reators.
Bjørn H. Hjertager
doaj   +1 more source

Social context prevents heat hormetic effects against mutagens during fish development

FEBS Letters, EarlyView.
This study shows that sublethal heat stress protects fish embryos against ultraviolet radiation, a concept known as ‘hormesis’. However, chemical stress transmission between fish embryos negates this protective effect. By providing evidence for the mechanistic molecular basis of heat stress hormesis and interindividual stress communication, this study ...
Lauric Feugere, Claudio Silva De Freitas, Adam Bates, Kenneth B. Storey, Pedro Beltran‐Alvarez, Katharina C. Wollenberg Valero   +5 more
wiley   +1 more source

Impact of grain evolution on the chemical structure of protoplanetary disks

, 2010
We study the impact of dust evolution in a protoplanetary disk around a T Tauri star on the disk chemical composition. For the first time we utilize a comprehensive model of dust evolution which includes growth, fragmentation and sedimentation.
A. I. Vasyunin, Acke, Aikawa, Andrews, Ayres, Bergin, Bouwman, C. P. Dullemond, Ciesla, Cortes, D'Alessio, D'Alessio, D. S. Wiebe, Dutrey, Garrod, Glassgold, Gorti, Graham, Haisch, Hayashi, Henning, Henning, Herczeg, Hernández, Kessler-Silacci, Lee, Natta, Oliveira, Pascucci, Podosek, Qi, S. Zhukovska, Salyk, Sano, Schmitt, Semenov, Shakura, Sicilia-Aguilar, Sicilia-Aguilar, T. Birnstiel, T. Henning, Terada, Thalmann, Thrane, Umebayashi, Vasyunin, Vasyunin, Weingartner, Wilner, Öberg   +49 more
core   +1 more source

Mathematical modeling for digestible protein in animal feeds for tilapia

Revista Brasileira de Zootecnia, 2012
The objective of this study was to formulate mathematical models to estimate digestible protein in some animal feeds for tilapia. Literature results of the proximate composition of crude protein, ether extract, and mineral matter, as well as digestible ...
Luiz Vítor Oliveira Vidal, Wilson Massamitu Furuya, Elias Nunes Martins, Tadeu Orlandi Xavier, Mariana Michelato, Themis Sakaguti Graciano   +5 more
doaj   +1 more source

Models of necessity

Beilstein Journal of Organic Chemistry, 2020
The way chemists represent chemical structures as two-dimensional sketches made up of atoms and bonds, simplifying the complex three-dimensional molecules comprising nuclei and electrons of the quantum mechanical description, is the everyday language of ...
Timothy Clark, Martin G. Hicks
doaj   +1 more source

Influence of chemical kinetics on detonation initiating by temperature gradients in methane/air [PDF]

, 2018
Different simplified and detailed chemical models and their impact on simulations of combustion regimes initiating by the initial temperature gradient in methane/air mixtures are studied. The limits of the regimes of reaction wave propagation depend upon the spontaneous wave speed and the characteristic velocities of the problem.
arxiv   +1 more source

miRNA‐29 regulates epidermal and mesenchymal functions in skin repair

FEBS Letters, EarlyView.
miRNA‐29 inhibits cell‐to‐cell and cell‐to‐matrix adhesion by silencing mRNA targets. Adhesion is controlled by complex interactions between many types of molecules coded by mRNAs. This is crucial for keeping together the layers of the skin and for regenerating the skin after wounding.
Lalitha Thiagarajan, Rosa Sanchez‐Alvarez, Chiho Kambara, Poojitha Rajasekar, Yuluang Wang, François Halloy, Jonathan Hall, Hans‐Jürgen Stark, Iris Martin, Petra Boukamp, Svitlana Kurinna   +10 more
wiley   +1 more source

Spot‐14 and its paralog Spot‐14R regulate expression of metabolic and thermogenic pathway genes in murine brown and beige adipocytes

FEBS Letters, EarlyView.
Spot‐14 and Spot‐14R play distinct roles in regulating metabolism in brown and beige adipocytes. While both influence lipid and glucose pathways, Spot‐14 uniquely controls thermogenic gene expression. This dual regulation balances energy storage and heat production, highlighting potential therapeutic targets for obesity and metabolic disorders. Spot 14
Lidia Itzel Castro‐Rodríguez, Cristina Velez‐delValle, Claudia Patricia Hernández‐Mosqueira, Walid Kuri‐Harcuch   +3 more
wiley   +1 more source

Scaling limits of spatial compartment models for chemical reaction networks

, 2015
We study the effects of fast spatial movement of molecules on the dynamics of chemical species in a spatially heterogeneous chemical reaction network using a compartment model. The reaction networks we consider are either single- or multi-scale.
Pfaffelhuber, Peter, Popovic, Lea
core   +1 more source

A cellular system to study responses to a collision between the transcription complex and a protein‐bound nick in the DNA template

FEBS Letters, EarlyView.
We present the cellular transcription‐coupled Flp‐nick system allowing the introduction of a Top1‐mimicking cleavage complex (Flpcc) at a Flp recognition target site within a controllable LacZ gene. LacZ transcription leads to the collision of RNA polymerase II (RNAPII) with Flpcc, and this causes RNAPII stalling, ubiquitination, and degradation.
Petra Herring, Morten Roedgaard, Camilla Myrup Holst, Helene Christensen, Birgitta R. Knudsen, Lotte Bjergbaek, Anni Hangaard Andersen   +6 more
wiley   +1 more source