Results 81 to 90 of about 235,106 (262)

Nature of Acidic Properties of Litter in Bog Birch Forests [PDF]

Журнал Сибирского федерального университета: Серия Биология, 2013
Different litter types (strongly decomposed, average decomposed, rhizomatous, peaty, peatified and peaty) characterized by acid and heavily acid reaction of environment, have been formed in the ecological series of bog birch forests beginning from the ...
Tamara T. Efremova, Stanislav P. Efremov
doaj  

Esterification of Glycerol With Oleic Acid Over Hydrophobic Zirconia-Silica Acid Catalyst and Commercial Acid Catalyst: Optimization and Influence of Catalyst Acidity

Frontiers in Chemistry, 2019
Catalytic esterification of glycerol with oleic acid (OA) was optimized over hydrophobic mesoporous zirconia-silica heterogeneous acid catalyst (ZrO2-SiO2-Me&Et-PhSO3H) and benchmarked with commercial catalysts (Aquivion and Amberlyst 15) in order to
Pei San Kong, Yolande Pérès, Wan Mohd Ashri Wan Daud, Patrick Cognet, Mohamed Kheireddine Aroua, Mohamed Kheireddine Aroua   +5 more
doaj   +1 more source

Reconstructing enzyme evolution by protein engineering

FEBS Letters, EarlyView.
Natural enzyme evolution can be retraced by protein engineering methods such as directed evolution, rational design, and ancestral sequence reconstruction. These approaches reveal how enzymes emerged from ligand‐binding scaffolds, developed varying substrate preferences, formed oligomeric complexes, adapted to environmental changes, and evolved novel ...
Lukas Drexler, Markus R. Busch, Reinhard Sterner   +2 more
wiley   +1 more source

Identification of a Shiga toxin A‐derived peptide internalized into Gb3 receptor‐bearing cells via interaction with the Shiga toxin B subunit

FEBS Letters, EarlyView.
The process of internalization of the Shiga toxin A subunit via formation of a complex with the Shiga toxin B subunit, which specifically binds to the Gb3 receptor. The peptide is designed to act as a carrier of drugs into cancer cells. Here, we explored the potential of peptides derived from the catalytic A subunit of Shiga toxin (STxA) to be drug ...
Giulia Opassi, João C. Encarnação, Valeria Napolitano, Grzegorz Dubin, Grzegorz Popowicz, Karl Andersson, U. Helena Danielson   +6 more
wiley   +1 more source

Conserved binding mode but diverse interfaces of MreC‐PBP2 interactions

FEBS Letters, EarlyView.
The crystal structure of abMreC reveals a conserved two β‐barrel architecture and provides structural insights into its role within the bacterial elongasome. The abMreC–abPBP2 complex model identifies the molecular basis of MreC‐mediated PBP2 recognition, contributing to the regulation of peptidoglycan synthesis.
Hyunseok Jang, Hyo Been Jin, Chang Min Kim, So Yeon Lee, Hyun Ho Park   +4 more
wiley   +1 more source

The Effect of Zirconium Incorporation on the Bronsted Acidity of Zeolite: A DFT Study

, 2011
The incorporation of zirconium atoms into the framework of some aluminosilicate molecular sieves can enhance the reactivities of some typical strong Bronsted acid needed reactions, and the strengthening of Bronsted acidity were regarded as one possible ...
Zheng, AM, Zhang, HL (张海禄), Deng, ZW (邓宗武)   +2 more
core  

Ophthalmic salines and the acidity question [PDF]

, 1990
What acidity (minimum pH) will most patients tolerate when using ophthalmic salines? After sone decades of trying to answer that question (and many continue to try), it is becoming increasingly evident that the question rather then the answer may be ...
Carney, Leo G., Hill, Richard M., Habenicht, Brenda L.   +2 more
core  

Microbiome‐blood–brain barrier interactions in aging — mechanisms and therapeutic potential

FEBS Letters, EarlyView.
Aging reshapes the gut microbiome (↓SCFA‐producing commensals; ↑pro‐inflammatory outputs), shifting circulating metabolites (↓SCFAs; ↑LPS, ↑TMAO, ↑PAA) that act at the BBB to increase nonspecific transcytosis, alter transport, and promote astrocyte reactivity, heightening brain vulnerability.
Daniel Cuervo‐Zanatta, Hari Baskar Balasubramanian, Amir Pasokh, Marietta Zille   +3 more
wiley   +1 more source

An epithelial GPR35 isoform supports tumor‐associated transcriptional and metabolic phenotypes

FEBS Letters, EarlyView.
GPR35 generates two functionally distinct isoforms with previously unresolved roles. GPR35‐short mediates immune‐cell chemotaxis, while GPR35‐long is enriched in colorectal cancer epithelium, where it supports increased metabolism, proliferation, and tumor‐associated transcriptional programs.
Jørgen D. Rønneberg, Martine Hjeltnes, Josephine Krieger, Joshua E. Elias, Maria Stensland, Kristian Holm, Xiaojun Jiang, Chuki Khangsar, Tuula A. Nyman, Arthur Kaser, Johannes R. Hov, Tom H. Karlsen, Nicole C. Kaneider, Frode L. Jahnsen, Georg Schneditz   +14 more
wiley   +1 more source

Rainfall acidity in northern Britain. [PDF]

, 1982
The acidity of rain has attracted considerable international interest during the past decade. An area of enhanced rainfall acidity with its focus in the Low Countries of north-west Europe was identified by the European air chemistry study1 for the period
Fowler, David, Leith, Ian, D. Fowler, J. N. Cape, Kinnaird, J W, I. D. Leith, Paterson, I S, I. S. Paterson, J. W. Kinnaird, Nicholson, I A, I. A. Nicholson   +10 more
core   +1 more source