Results 101 to 110 of about 86,603 (302)

Using iron speciation in authigenic carbonates from hydrocarbon seeps to trace variable redox conditions

, 2015
Seepage of hydrocarbon-rich fluids out of the marine sedimentary column is characterized by temporal changes of flow intensity and resultant spatially variable redox conditions.
Feng, Dong, Zheng, Guodong, Peckmann, Joern, Chen, Linying, Hu, Yu, Chen, Duofu   +5 more
core   +1 more source

Identifying and characterising a plant GH1 β‐glucosidase that exhibits hydrolytic activity on N‐linked glucopyranoside

FEBS Open Bio, EarlyView.
We report the first β‐glucosidase with demonstrated hydrolytic activity on an N‐linked glycopyranoside. The enzyme, native to maize, was biochemically characterised for this novel reaction, and structural modelling of the enzyme–substrate complex revealed several clues to the underlying reduced catalytic rate relative to its native O‐glycopyranoside ...
Hani Gharabli, Carlotta Chiesa, Maher Abou Hachem, Ditte Hededam Welner   +3 more
wiley   +1 more source

p-Nitrophenyl carbonate promoted ring-opening reactions of DBU and DBN affording lactam carbamates

Beilstein Journal of Organic Chemistry, 2016
The amidine bases DBU (1,8-diazabicyclo[5.4.0]undec-7-ene) and DBN (1,5-diazabicyclo[4.3.0]non-5-ene) display nucleophilic behaviour towards highly electrophilic p-nitrophenyl carbonate derivatives with ring opening of the bicyclic ring to form ...
Madhuri Vangala, Ganesh P Shinde
doaj   +1 more source

Structural studies and functional engineering of NanX: an anhydro‐sialic acid transporter from Escherichia coli

FEBS Open Bio, EarlyView.
Biophysical characterisation shows that NanX, a membrane transport protein from the major facilitator superfamily (MFS), forms both monomers and dimers after purification. AlphaFold modelling and substrate docking provide information on residues likely involved in substrate recognition for NanX and another MFS member, NanT.
Michael C. Newton‐Vesty, Kelsi R. Hall, Zachary D. Tillett, Liam S. Turk, James S. Davies, Michael J. Currie, Hamish G. Brown, Sepideh Valimehr, Peter D. Mace, Andrew E. Whitten, Santosh Panjikar, Eric Hanssen, Rachel A. North, Renwick C.J. Dobson   +13 more
wiley   +1 more source

Examples of Paleokarst in Mesozoic Carbonate Formations in the Carpathian Foreland Area

Energies
A paleokarst system developed in the Upper Jurassic–Lower Cretaceous carbonate complex has been recognized in the Carpathian Foreland area. Well logs testing and core data as well as an acoustic imager, a microresistivity scanner and six-arm dipmeter ...
Anna Łaba-Biel, Kinga Filipowska-Jeziorek, Andrzej Urbaniec, Mariusz Miziołek, Robert Bartoń, Bogdan Filar, Agnieszka Moska, Tadeusz Kwilosz   +7 more
doaj   +1 more source

3-Chloropropane-1,2-diol in models simulating processed foods: Precursors and agents causing its decomposition

Czech Journal of Food Sciences, 2003
Formation of 3-chloropropane-1,2-diol (3-MCPD) was studied in model mixtures consisting of sodium chloride and either glycerol or various lipids (phospholipids, monoacylglycerols, diacylglycerols, triacylglycerols) derived mainly from palmitic and oleic ...
J. Velíšek, P. Calta, C. Crews, S. Hasnip, M. Doležal   +4 more
doaj   +1 more source

In silico and in vitro exploration of a tyrosinase for biocatalytic production of catechols

FEBS Open Bio, EarlyView.
Tyrosinase from Ralstonia pseudosolanacearum is a promising biocatalyst for producing valuable catechols from monophenol substrates. This tyrosinase is uniquely suited to this due to its high monophenolase : diphenolase ratio. We combined in silico docking and in vivo kinetic characterisation of this tyrosinase with 11 industrially relevant monophenols,
James Britton, Fang Zhao, Reeta Davis, Meg Walsh, Kevin E O'Connor, David O'Connell, Tanja Narancic   +6 more
wiley   +1 more source

Iron–Carbonate (Bi, Cu, Li) Composites with Antimicrobial Activity After Silver(I) Ion Adsorption

Toxics
In the present study three composite materials based on iron in combination with bismuth, copper or lithium carbonates FeNO3@Li2CO3 (SFL), FeNO3@CuCO3 (SFC), and FeNO3@(BiO)2CO3 (SFB) were synthesized by coprecipitation.
Alexandra Berbentea, Mihaela Ciopec, Adina Negrea, Petru Negrea, Nicoleta Sorina Nemeş, Bogdan Pascu, Paula Svera, Narcis Duţeanu, Cătălin Ianăşi, Orsina Verdes, Mariana Suba, Daniel Marius Duda-Seiman, Delia Muntean   +12 more
doaj   +1 more source

Characterization of authigenic carbonates from Huoshaogang landfill, Guangzhou, China: implication for microbial metabolism

, 2015
Authigenic carbonates from a landfill leachate collection system (LCS) resulting from early diagenesis mediated by microbes, are unique archives of the biogeochemical processes and environmental conditions inducing the carbonate formation.
Feng, Junxi, Chen, Duofu
core   +1 more source

Stable isotope values in modern bryozoan carbonate from New Zealand and implications for paleoenvironmental interpretation [PDF]

, 2004
Bryozoan carbonate contains useful geochemical evidence of temperate shelf paleoenvironments. Stable isotope values were determined for 103 modern marine bryozoan skeletons representing 30 species from New Zealand. δ18O values range from -1.4 to 2.8 VPDB,
Nelson, Campbell S., Campbell S. Nelson, Marcus M. Key, Smith, Abigail M., Key, Marcus M., Patterson, William P., Abigail M. Smith, William P. Patterson   +7 more
core   +1 more source