Results 51 to 60 of about 1,134,652 (309)

Alteration of the organic matter fractions in soil cultivated with sugarcane in the Cerrado-Amazon transition zone

Pesquisa Agropecuária Tropical, 2022
The use of agroindustrial wastes, such as vinasse, may alter the soil chemical and physical characteristics. This study aimed to evaluate the total organic carbon and total nitrogen in a soil and the distribution of carbon and nitrogen in the
Esvanio Édipo da Silva Ferreira, Elisamara Caldeira do Nascimento, Adeilson Nascimento da Silva, Keller Regina Soares, Oscarlina Lúcia dos Santos Weber   +4 more
doaj   +1 more source

Traceable measurement of total organic carbon, TOC [PDF]

17th International Congress of Metrology, 2015
La mesure du taux de Carbone Organique Total, COT, est utilisee pour evaluer la purete de l’eau dans l’industrie pharmaceutique. Quelques pharmacopees imposent des exigences de test d’adequation du systeme (SST), mais il n’y a aucune demande concernant la qualite de l’etalonnage ou de la mesure, et il est rare que l’incertitude d‘etalonnage soit ...
Jeanett Norrbohm Sørensen, Klaus Liljegren   +1 more
openaire   +1 more source

Open ocean carbon monoxide photo-production [PDF]

, 2006
Sunlight-initiated photolysis of chromophoric dissolved organic matter (CDOM) is the dominant source of carbon monoxide (CO) in the open-ocean. A modelling study was conducted to constrain this source.
Law, Cliff S., Mopper, Kenneth, Robinson, Carol, Stubbins, Aron, Uher, Günther, Upstill-Goddard, Robert C.   +5 more
core   +2 more sources

Gut microbiome and aging—A dynamic interplay of microbes, metabolites, and the immune system

FEBS Letters, EarlyView.
Age‐dependent shifts in microbial communities engender shifts in microbial metabolite profiles. These in turn drive shifts in barrier surface permeability of the gut and brain and induce immune activation. When paired with preexisting age‐related chronic inflammation this increases the risk of neuroinflammation and neurodegenerative diseases.
Aaron Mehl, Eran Blacher
wiley   +1 more source

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

FEBS 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, Carl P. O. Helmer, Shani Zev, Ronja Driller, Emily Buhr, Markus Reinbold, Renana Schwartz, Gabriel Foley, Mikael Boden, Daniel Garbe, Gerhard Schenk, Dan Thomas Major, Bernhard Loll, Thomas Brück   +13 more
wiley   +1 more source

Comparative analysis of TOC and conductivity analysers as applied to pharmaceutical water analysis [PDF]

, 2012
Pharmaceutical grade water requires the measurement of bioburden, Total Organic Carbon and conductivity. Here we report a comparative analysis from two TOC analysers and two conductivity systems.
Dick, Lindsay, Elliott, Moira, Ford, Steven, Gray, Andrew, Halbert, Gavin   +4 more
core   +1 more source

Linking neurogenesis, oligodendrogenesis, and myelination defects to neurodevelopmental disruption in primary mitochondrial disorders

FEBS Letters, EarlyView.
Mitochondrial remodeling shapes neural and glial lineage progression by matching metabolic supply with demand. Elevated OXPHOS supports differentiation and myelin formation, while myelin compaction lowers mitochondrial dependence, revealing mitochondria as key drivers of developmental energy adaptation.
Sahitya Ranjan Biswas, Porter L. Tomsick, Alicia M. Pickrell, Paul D. Morton   +3 more
wiley   +1 more source

Development of a fully coupled biogeochemical reactive transport model to simulate microbial oxidation of organic carbon and pyrite under nitrate‐reducing conditions [PDF]

, 2018
©2018. American Geophysical UnionIn regions with intensive agriculture nitrate is one of the most relevant contaminants in groundwater. Denitrification reduces elevated nitrate concentrations in many aquifers, yet the denitrification potential is limited
Engelhardt, Irina, Jacques, Diederik, Kludt, Christoph, Knabe, Dustin, Lichtner, Peter   +4 more
core   +1 more source

TRAIL‐PEG‐Apt‐PLGA nanosystem as an aptamer‐targeted drug delivery system potential for triple‐negative breast cancer therapy using in vivo mouse model

Molecular Oncology, EarlyView.
Aptamers are used both therapeutically and as targeting agents in cancer treatment. We developed an aptamer‐targeted PLGA–TRAIL nanosystem that exhibited superior therapeutic efficacy in NOD/SCID breast cancer models. This nanosystem represents a novel biotechnological drug candidate for suppressing resistance development in breast cancer.
Gulen Melike Demirbolat, Aslihan Kucuk, Omer Erdogan, Samed Ozer, Bensu Kozan, Tugba Cuceli, Erkan Gumus, Evrim Cevik, Ozge Cevik   +8 more
wiley   +1 more source

Issues Related to Incorporating Northern Peatlands into Global Climate Models [PDF]

, 2009
Northern peatlands cover ~3–4 million km2 (~10% of the land north of 45°N) and contain ~200–400 Pg carbon (~10–20% of total global soil carbon), almost entirely as peat (organic soil).
Frolking, Steve, Lawrence, David, Roulet, Nigel T   +2 more
core   +1 more source