Results 31 to 40 of about 1,021,442 (304)

Clay minerals and sedimentary basin history [PDF]

open access: yes, 2005
Clay minerals in the mud and soil that coat the Earth's surface are part of a clay cycle that breaks down and creates rock in the crust. Clays generated by surface weathering and shallow diagenetic processes are transformed into mature clay mineral ...
Merriman, Richard J.
core   +1 more source

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

Hybrid optimization for DC resistivity imaging via intelligible-in-time logic and the interior point method

open access: yesScientific Reports
Geophysical DC resistivity imaging is crucial in subsurface exploration, environmental studies, and resource assessment. However, traditional inversion techniques face challenges in accurately resolving complex subsurface features because of the inherent
Paul Edigbue   +3 more
doaj   +1 more source

Method for producing oxygen from lunar materials [PDF]

open access: yes, 1993
This invention is related to producing oxygen from lunar or Martian materials, particularly from lunar ilmenite in situ. The process includes producing a slurry of the minerals and hot sulfuric acid, the acid and minerals reacting to form sulfates of the
Sullivan, Thomas A.
core   +1 more source

Pioglitazone plus (−)‐epigallocatechin gallate: a novel approach to enhance osteogenic performance in aged bone marrow mesenchymal stem cells

open access: yesFEBS Open Bio, EarlyView.
Aged human bmMSCs are seeded in the scaffold. Osteoblastic induction can slightly increase cell's bone‐forming activity to produce bone‐like tissues, shown as the sporadic xylenol orange‐stained spots (the lower left image). Notably, pioglitazone plus EGCG co‐treatment dramatically increases cell's bone‐forming activity and bone‐like tissue production (
Ching‐Yun Chen   +6 more
wiley   +1 more source

Strata-bound Dolomitization in the Eocene Laki Formation, Matyaro Jabal Area Lakhi Range, Sindh, Pakistan [PDF]

open access: yesInternational Journal of Economic and Environment Geology, 2015
The limestone of Eocene age Laki Formation of Matyaro Jabal area, Lakhi Range SindhPakistan has been studied to see different sedimentary features and diagenetic overprinting.
Muhammad Waseem Khan   +3 more
doaj  

Compilation of the data on the land withdrawals in Alaska [PDF]

open access: yes, 1978
Major decisions an the use and disposition of land in Alaska are being made by the State and Federal governments. These decisions will affect the utilization of all our land resources including minerals. Since minerals are an essential component of our
Lynch, D.F., Metz, P.A., Pearson, R.W.
core  

Multi‐omics and low‐input proteomics profiling reveals dynamic regulation driving pluripotency initiation in early mouse embryos

open access: yesFEBS Open Bio, EarlyView.
Mouse pre‐implantation development involves a transition from totipotency to pluripotency. Integrating transcriptomics, epigenetic profiling, low‐input proteomics and functional assays, we show that eight‐cell embryos retain residual totipotency features, whereas cytoskeletal remodeling regulated by the ubiquitin‐proteasome system drives progression ...
Wanqiong Li   +8 more
wiley   +1 more source

Supergene Enriched, Intrusion Related Low Suphidation Deposit, Binebase-Bawone, North Sulawesi, Indonesia

open access: yesIndonesian Journal on Geoscience, 2014
DOI: 10.17014/ijog.v7i4.150Gold mineralization at East Asia Minerals’ Binebase Prospect on Sangihe Island displays controls to mineralization typical of other Pacific Rim Intrusion related low sulphidation systems.
A. Wisanggono   +4 more
doaj   +1 more source

Assessment of polycarbonate material as a sustainable substitute for glazing in hot climates

open access: yesInternational Journal of Sustainable Energy, 2023
In modern buildings, it is evident that exterior glazing is highly desirable to enhance the visual environment and provide daylight. This study investigates the energy performance of polycarbonate glazing as a potential substitute for conventional glass.
Mohammed Alhaji Mohammed   +2 more
doaj   +1 more source

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