Results 31 to 40 of about 155,634 (173)
Extrinsic noise passing through a Michaelis-Menten reaction: A universal response of a genetic switch [PDF]
, 2009 The study of biochemical pathways usually focuses on a small section of a protein interactions network. Two distinct sources contribute to the noise in such a system: intrinsic noise, inherent in the studied reactions, and extrinsic noise generated in other parts of the network or in the environment.
arxiv +1 more source
Exploring conformational energy landscape of glassy disaccharides by CPMAS 13C NMR and DFT/GIAO simulations. II. Enhanced molecular flexibility in amorphous trehalose [PDF]
Journal of Chemical Physics 126 (07/01/2007) 014510, 2006 This paper deals with the comparative use of the chemical shift surfaces to simulate experimental 13C CPMAS data on amorphous solid state disaccharides, paying particular attention to -1-1 linkage of trehalose, to -1,4 linkage between pyranose rings (lactose) and to linkage implying a furanose ring (sucrose).
arxiv +1 more source
Proceedings of the National Academy of Sciences of the United States of America, 2016 Significance Approximately 75% of the global human population are lactose malabsorbers. In a previous clinical trial, it was shown that feeding a high-purity galactooligosaccharide (>95% GOS) could improve symptoms of lactose-intolerant subjects ...
M. A. Azcarate-Peril +6 more
semanticscholar +1 more source
The World Allergy Organization Journal, 2017 Lactose is the main carbohydrate in human and mammalian milk. Lactose requires enzymatic hydrolysis by lactase into D-glucose and D-galactose before it can be absorbed.
R. Heine +9 more
semanticscholar +1 more source
Network Topology as a Driver of Bistability in the lac Operon [PDF]
J Comput Biol. 2011 Jun;18(6):783-94, 2008 The lac operon in Escherichia coli has been studied extensively and is one of the earliest gene systems found to undergo both positive and negative control. The lac operon is known to exhibit bistability, in the sense that the operon is either induced or uninduced. Many dynamical models have been proposed to capture this phenomenon.
arxiv +1 more source
Hybridization Induced Transparency in composites of metamaterials and atomic media [PDF]
Opt. Express 19, 23573-23580 (2011), 2011 We report hybridization induced transparency (HIT) in a composite medium consisting of a metamaterial and a dielectric. We develop an analytic model that explains HIT by coherent coupling between the hybridized local fields of the metamaterial and the dielectric or an atomic system in general.
arxiv +1 more source
Scientific Reports, 2018 Catabolite repression refers to the process where the metabolism of one sugar represses the genes involved in metabolizing another sugar. While glucose provides the canonical example, many other sugars are also known to induce catabolite repression ...
E. Ammar, Xiaoyi Wang, C. V. Rao
semanticscholar +1 more source
Observation of anisotropic diffusion of light in compacted granular porous materials [PDF]
Phys. Rev. E 85, 040301 (2012), Rapid Communication, 2011 It is known that compaction of granular matter can lead to anisotropic mechanical properties. Recent work has confirmed the link to pore space anisotropy, but the relation between compression, mechanical properties and material microstructure remains poorly understood and new diagnostic tools are needed.
arxiv +1 more source
Bistability of the lac operon during growth of Escherichia coli on lactose and lactose + glucose [PDF]
arXiv, 2007 The lac operon of Escherichia coli exhibits bistability. Early studies showed that bistability occurs during growth on TMG/succinate and lactose + glucose, but not during growth on lactose. More recent studies with lacGFP-transfected cells show bistability with TMG/succinate, but not with lactose and lactose + glucose.
arxiv
Lactose Intolerance in Adults: Biological Mechanism and Dietary Management
Nutrients, 2015 Lactose intolerance related to primary or secondary lactase deficiency is characterized by abdominal pain and distension, borborygmi, flatus, and diarrhea induced by lactose in dairy products.
Yanyong Deng +3 more
semanticscholar +1 more source