Results 61 to 70 of about 437,331 (302)

Characterization of the potential mercury contamination in the Apolobamba gold mining area, Bolivia Caracterización de la contaminación potencial por mercurio en el área minera de Apolobamba, Bolivia Caracterizaçao da potencial contaminaçao por mercúrio na área mineira de Apolobamba, Bolívia [PDF]

Spanish Journal of Soil Science, 2011
<p style="text-align: justify;">A large amount of Hg is used for gold extraction through the amalgamation process in the Apolobamba gold mining area located in the northwest part of La Paz, Bolivia.
José A. Acosta, Silvia Martínez-Martínez, Ángel Faz Cano, Rocío MIllán, María Ángeles Muñoz, Tania Terán, Ricardo Vera   +6 more
doaj   +1 more source

Dependence of the performance of the reclaiming sewer cleaner with rigid guides from interchangeable bucket tools capabilities

Овощи России, 2022
Relevance. Cleaning of reclamation channels is a very relevant event. The need to clean the canals and maintain them in working condition becomes obvious during the flood period, when it is necessary to remove excess water.
Kh. A. Abdulmazhidov
doaj   +1 more source

Partial depletion of plasminogen activator inhibitor‐1 decreases subcutaneous fat cell hypertrophy and liver cholesterol in high‐fat‐fed female mice

FEBS Letters, EarlyView.
Obesity raises blood levels of PAI‐1, a protein linked to metabolic dysfunction‐associated steatotic liver disease in people with obesity. In female mice fed a high‐fat diet, partially lowering PAI‐1 led to smaller subcutaneous fat cells and lower liver cholesterol, without changing body weight or insulin sensitivity.
Claudia E. Ramirez Bustamante, Robert Sharp, Pradip K. Saha, Elizabeth S. Anaya, Elizabeth L. Lieu, Evelyn L. de Groot, Pooja Patel, Mi Jeong Heo, Aaron R. Cox, Kang Ho Kim, Sean M. Hartig   +10 more
wiley   +1 more source

Analysis on intelligent upgrading and transformation of seismic stations in Hebei Province

地震科学进展
With the increasing number of earthquake stations and scaling up of unmanned stations, the traditional operation and maintenance mode of stations is facing various challenges such as frequent power supply, communication, and instrument failures.
Qin Tian, Kainan Chen, Pengjie Zhang
doaj   +1 more source

Ligand‐dependent transcriptional heterogeneity in cell cycle gene expression delays G1/S entry

FEBS Letters, EarlyView.
EGF and HRG induce distinct G1/S progression programs in ErbB2‐amplified BT474 breast cancer cells. Despite activating the potent ErbB2–ErbB3 heterodimer, HRG does not accelerate cell‐cycle entry. Instead, EGF promotes earlier restriction‐point passage via ERK–FOS signaling, whereas HRG activates the AKT–MYC axis, driving transcriptional heterogeneity ...
Ririn Rahmala Febri, Ayaka Nagasato‐Ichikawa, Keita Iida, Shuhei Kimura, Akira Imamoto, Mariko Okada   +5 more
wiley   +1 more source

River sediments [PDF]

Philosophical Transactions of the Royal Society A: Mathematical, Physical and Engineering Sciences, 2012
Abstract River history is reflected in the nature of the sediments carried and deposited over time. Using examples drawn from around the world, this account illustrates how river sediments have been used to reconstruct past environmental changes at a variety of scales in time and space.
openaire   +3 more sources

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

Terrestrial organic matter biomarkers as tracers of Hg sources in lake sediments [PDF]

, 2010
Terrestrial organic matter (TOM) plays a key role in mercury (Hg) dynamics between watersheds and lakes. In this study we attempts to determine the role of TOM source and quality and not only quantity, in the fate and transport of total Hg (T-Hg) to ...
Lucotte, Marc, Houel, Stéphane, Teisserenc, Roman, Roman Teisserenc, Stéphane Houel, Marc Lucotte   +5 more
core   +1 more source

Analysis of the synchronous rise of water level in the Tangshan fault zone

Scientific Reports
Since 2019, a synchronous and abnormal upward trend in water levels has been observed in the Tangshan and Majiagou observation wells, located within the Tangshan fault zone, coinciding with three earthquakes of magnitude 4.0 or higher in the Tangshan ...
Jie Tang, Suxin Zhang, Dong Ma, Yan Wang, Lina Sun, Wenlou Luan   +5 more
doaj   +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