Results 71 to 80 of about 6,215,927 (308)

Ambient Water Quality Criteria Recommendations: Information Supporting the Development of State and Tribal Nutrient Criteria for Rivers and Streams in Nutrient Ecoregion II

, 2000
This document presents Environmental Protection Agency's nutrient criteria for Rivers and Streams in Nutrient Ecoregion ...
United States Environmental Protection Agency, Health and Ecological Criteria Division
core  

The Locational Criteria of High Technology Companies [PDF]

, 1985
The paper outlines the various criteria that companies might use in the process of searching for a site. Criteria are examined in terms of how they relate to the varied characteristics of a company.
Tosh, David
core  

Structural and biochemical analysis of a B12 superbinder

FEBS Letters, EarlyView.
BtuG proteins are vitamin B12 scavengers in Bacteroides thetaiotaomicron, a dominant human gut bacterium. We present crystal structures of three BtuG homologs bound to cobalamin and its precursor cobinamide, revealing picomolar binding affinities, among the highest known for any natural protein.
Jose M. Martinez Felices, Jacob J. Whittaker, Dirk J. Slotboom, Albert Guskov   +3 more
wiley   +1 more source

Structures of mycobacterial 3‐methylcrotonyl‐CoA carboxylase reveal carrier‐domain translocation between catalytic sites

FEBS Letters, EarlyView.
Mycobacterial 3‐methylcrotonyl‐CoA carboxylase uses a mobile biotin‐carrying domain to shuttle a carboxyl group between two catalytic sites, enabling carboxylation of 3‐methylcrotonyl‐CoA during leucine breakdown. Cryo‐electron microscopy captures the carrier at both sites and reveals an inward loop movement that may prevent futile rebinding to the ...
Ajit Yadav, Bogdan I. Florea, Sebastian Geibel   +2 more
wiley   +1 more source

Non-targeted screening and characterization of organic pollutants in wastewater from an industrial park in China

Emerging Contaminants
Industrial parks are significant sources of complex water pollution, making it challenging to trace pollutant origins and ensure water quality. This study established a non-targeted screening workflow and compound persistence, mobility, and toxicity (PMT)
Xu Tan, Shanwei Sun, Song Hou, Linlin Wu, Yangwei Bai, Hongbo Xi, Jian Xu, Changsheng Guo   +7 more
doaj   +1 more source

Phytoplankton and Eutrophication Degree Assessment of Baiyangdian Lake Wetland, China

The Scientific World Journal, 2013
Eight typical sampling sites were chosen to investigate the phytoplankton community structure and to assess the eutrophication degree of Baiyangdian Lake in 2009.
Xing Wang, Yu Wang, Lusan Liu, Jianmin Shu, Yanzhong Zhu, Juan Zhou   +5 more
doaj   +1 more source

The Shewanella oneidensis Fic enzyme SoFic targets the switch‐I region of EF‐Tu for AMPylation

FEBS Letters, EarlyView.
Fic enzymes mediate diverse post‐translational modifications across all domains of life, including AMPylation. Prokaryotic EF‐Tu can be AMPylated and deAMPylated by the conserved Fic enzyme SoFic. Structural and biochemical approaches were used to characterize the effect of AMPylation on EF‐Tu, SoFic's enzymatic activities, and the enzyme‐target ...
Svenja Runge, Vivian Pogenberg, Alexander Baumgart, Bente Siebels, Hartmut Schlüter, Michael Hecht‐Bucher, Aymelt Itzen   +6 more
wiley   +1 more source

Advances and Challenges in Understanding Atmospheric Oxidizing Capacity in China: Insights from Chemical Mechanisms and Model Applications

Toxics
The ability of the atmosphere to convert primary pollutants into secondary pollutants through atmospheric oxidants is referred to as the atmospheric oxidizing capacity (AOC).
Peixuan Li, Yanqin Ren, Fang Bi, Fangyun Long, Junling Li, Haijie Zhang, Zhenhai Wu, Hong Li   +7 more
doaj   +1 more source

Ambient Water Quality Criteria Recommendations: Information Supporting the Development of State and Tribal Nutrient Criteria for Rivers and Streams in Nutrient Ecoregion III

, 2000
This document presents EPA's nutrient criteria for Rivers and Streams in Nutrient Ecoregion ...
United States Environmental Protection Agency, Health and Ecological Criteria Division
core  

Membrane composition and thermodynamic identity as boundaries of life for synthetic cell research

FEBS Letters, EarlyView.
What makes a cell a cell? The boundary of a living cell is not just a wall. Read as a Markov blanket, the membrane separates internal from external states, generating identity and non‐equilibrium order. Can this identity be rebuilt from scratch in a synthetic cell?
Caterina Presutti, Bert Poolman
wiley   +1 more source