Results 21 to 30 of about 2,365,187 (308)

Engineering method for determining the sulfur of mineral impurities for the prediction of hazardous properties of coal seams

open access: yesГеофизический журнал, 2023
Purpose: develop an engineering method for determining sulfur in mineral impurities to predict the hazardous properties of mine seams in mining operations.
Ye.S. Rudniev   +4 more
doaj   +1 more source

Mineral consolidants

open access: yesProceedings of the International RILEM Conference Materials, Systems and Structures in Civil Engineering 2016 - Segment on Historical Masonry, 2016
Inorganic consolidants, such as ethyl silicate, nanolime and ammonium oxalate, have proven to be effective for certain materials, but each has its drawbacks. This has recently led to the investigation of hydroxyapatite (HAP) as a novel inorganic consolidant, which demonstrated excellent performance on carbonate stones.
George W. Scherer, SASSONI, ENRICO
openaire   +3 more sources

Nitrous oxide consumption potentials of well-drained forest soils in Southern Québec, Canada. [PDF]

open access: yes, 2010
To establish the major controls on N2O consumption by forest soils, we conducted laboratory incubations of 16 samples from four soil types, two organic and two mineral, varying in overlying forest vegetation (sugar maple, American beech and eastern ...
Frasier, Rebeccah   +2 more
core   +1 more source

Nitric acid scavenging by mineral and biomass burning aerosols [PDF]

open access: yes, 1998
The abundance of gas phase nitric acid in the upper troposphere is overestimated by global chemistry-transport models, especially during the spring and summer seasons.
Chatfield, R B   +8 more
core   +2 more sources

Upacicalcet: A Novel Intravenous Calcimimetic Agent for Patients Undergoing Hemodialysis With Secondary Hyperparathyroidism

open access: yesTherapeutic Apheresis and Dialysis, EarlyView.
ABSTRACT Secondary hyperparathyroidism (SHPT) is a common complication in patients receiving maintenance dialysis, driven by calcium and phosphate metabolism disturbances. Calcimimetics are central to the management of SHPT by enhancing calcium‐sensing receptor sensitivity and reducing parathyroid hormone secretion.
Fumihiko Koiwa   +3 more
wiley   +1 more source

Can a continuous mineral foam explain the stiffening of aged bone tissue? A micromechanical approach to mineral fusion in musculoskeletal tissues [PDF]

open access: yes, 2016
Recent experimental data revealed a stiffening of aged cortical bone tissue, which could not be explained by common multiscale elastic material models.
Gerisch, A.   +4 more
core   +1 more source

Structural biology of ferritin nanocages

open access: yesFEBS Letters, EarlyView.
Ferritin is a conserved iron‐storage protein that sequesters iron as a ferric mineral core within a nanocage, protecting cells from oxidative damage and maintaining iron homeostasis. This review discusses ferritin biology, structure, and function, and highlights recent cryo‐EM studies revealing mechanisms of ferritinophagy, cellular iron uptake, and ...
Eloise Mastrangelo, Flavio Di Pisa
wiley   +1 more source

Response of mineral formulation towards different growth phases of arabica coffee in lowland

open access: yesIlmu Pertanian (Agricultural Science)
Arabica coffee cultivation is limited by altitude, which affects its production. Some farmers in Jember Regency are innovating to grow arabica coffee in the lowland, but the potential for leaf rust disease is quite high.
Distiana Wulanjari   +6 more
doaj   +1 more source

A Summary of gold fineness values from Alaska placer deposits [PDF]

open access: yes, 1981
This report is the first in a series of publications by the Mineral Industry Research Laboratory and the Alaska Division of Geological and Geophysical Surveys under a special appropriation by the Alaska State Legislature to the School of Mineral Industry
Hawkins, D.B., Metz, P.A.
core  

A methionine‐lined active site governs carbocation stabilization and product specificity in a bacterial terpene synthase

open access: yesFEBS Letters, EarlyView.
This study reveals a unique active site enriched in methionine residues and demonstrates that these residues play a critical role by stabilizing carbocation intermediates through novel sulfur–cation interactions. Structure‐guided mutagenesis further revealed variants with significantly altered product profiles, enhancing pseudopterosin formation. These
Marion Ringel   +13 more
wiley   +1 more source

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