Results 101 to 110 of about 5,028,792 (285)

Genetic Characterisation of the upp Gene in Bifidobacterium bifidum PRL2010

Microbial Biotechnology, Volume 18, Issue 7, July 2025.
In this study, we examined the highly conserved upp gene in bifidobacteria, which encodes uracil phosphoribosyltransferase and plays a role in the pyrimidine salvage pathway. Specifically, we explore its evolutionary trajectory in bifidobacteria, shedding light on its role in microbial competition in the human gut.
Giulia Longhi, Silvia Petraro, Christian Milani, Chiara Tarracchini, Chiara Argentini, Laura Maria Vergna, Gabriele Andrea Lugli, Leonardo Mancabelli, Ciaran Lee, Francesca Turroni, Douwe van Sinderen, Marco Ventura   +11 more
wiley   +1 more source

Influence of Solvent Composition on the Crystal Morphology and Structure of p-Aminobenzoic Acid Crystallized from Mixed Ethanol and Nitromethane Solutions

, 2017
The crystallization of α-p-aminobenzoic acid (pABA) from mixed solutions in ethanol (EtOH) and nitromethane (NMe) is reported. From solutions with compositions >60 wt % NMe, the known α-polymorph of pABA appears. In contrast, crystals prepared from mixed
I. Rosbottom, Cai Y. Ma, T. Turner, R. A. O'connell, Jonathan J. Loughrey, G. Sadiq, R. Davey, K. Roberts   +7 more
semanticscholar   +1 more source

An Efficient Thiol‐ene Mediated Protocol for Thiolated Peptide Synthesis and On‐Resin Diversification

Chemistry – A European Journal, Volume 31, Issue 36, June 26, 2025.
Herein, a sequential acyl‐thiol‐ene/S‐deacetylation protocol for selective installation of thiol residues onto synthetic peptides, on‐resin, is demonstrated. The hydrothiolation/S‐deacetylation protocol offers a novel synthetic tool for direct peptide conjugation on‐resin and for the preparation of novel disulfide containing neuropeptides displaying ...
Nikita Ostrovitsa, Conor Williams, Konstantin Raabe, Joshua T. McLean, Markus Muttenthaler, Eoin M. Scanlan   +5 more
wiley   +1 more source

Nanocomposite Thin Film of Poly(3-aminobenzoic acid) and Multiwalled Carbon Nanotubes Fabricated through an Electrochemical Method

Advances in Materials Science and Engineering, 2014
The composite thin films of poly(3-aminobenzoic acid) (PABA) and multiwalled carbon nanotubes (MWNTs) are successfully fabricated through an electrochemical method.
Paphawadee Netsuwan, Wirat Chaisu, Sukon Phanichphant, Saengrawee Sriwichai   +3 more
doaj   +1 more source

A Direct Measurement of the Absolute Energies of Protonated Gly‐Pro‐Gly‐Gly Conformations Using Ion Mobility Spectrometry and Guided Ion Beam Tandem Mass Spectrometry

ChemPhysChem, Volume 26, Issue 12, June 23, 2025.
Relative energies of the cis and trans conformers of the protonated tetrapeptide, Gly‐Pro‐Gly‐Gly, selected by ion mobility spectrometry are measured using threshold collision‐induced dissociation. The trans conformation was found to be more stable than the cis conformation by 4.5 ± 2.5 kJ mol−1 at 0 K, a value in agreement with several levels of ...
Brandon C. Stevenson, Shannon A. Raab, David E. Clemmer, Peter B. Armentrout   +3 more
wiley   +1 more source

Sunscreens - Which and what for? [PDF]

, 2005
It is well established that sun exposure is the main cause for the development of skin cancer. Chronic continuous UV radiation is believed to induce malignant melanoma, whereas intermittent high-dose UV exposure contributes to the occurrence of actinic ...
Ananthaswamy HN, Autier P, Azurdia RM, Birt DF, Bush JA, Damian DL, Darlington S, Gallagher RP, Gers-Balag H, Gil EM, Green A, Hallmans G, Hany J, Katiyar SK, Kipp C, Kricker A, Krutman J, Kunz PY, Lapidot N, Levy SB, Loeppky R, Mackie B, Mc Vean M, Mitchnik M, Montemarano AD, Noonan FP, Okereke CS, Perugini P, Petersen AB, Pinnell SR, Poh Agin P, Poon TS, Record IR, Rouabia M, Runger TM, Sayre RM, Scalia S, Schauder S, Schlumpf M, Schrader K, Schulz J, Schwarz VA, Stern RS, Tebbe B, Wamer W, Wang ZY, Wolf R, Wulf HC, Yarosh D, Zhao J   +49 more
core   +1 more source

Improved Chemical Synthesis of Avenanthramides Family and its Analogs by Mixed Anhydride Method

European Journal of Organic Chemistry, Volume 28, Issue 21, June 3, 2025.
Valuable phytochemicals, including avenanthramides A, B, C, E, and some analogs, have been rapidly prepared as carbonate‐protected derivatives in acetone, achieving high yields by crystallization.. This process utilizes the mixed anhydride method with a triethylamine‐isobutyl chloroformate reagent system. The protection can be readily removed on demand
Armando Zarrelli, Luigi Longobardo
wiley   +1 more source

Expanded Diversity of Microbial Groups Capable of Anaerobic Pyrite Reduction and Assimilation of Dissolution Products

Environmental Microbiology, Volume 27, Issue 6, June 2025.
Expanded diversity of microbial groups capable of anaerobic pyrite reduction. Devon Payne and Eric Boyd. Different microbial guilds were tested for their ability to reductively dissolve pyrite and mobilize iron and sulfur to support growth. Metabolic guilds capable of pyrite reduction were determined (top) and mechanisms of extracellular electron ...
Eric S. Boyd, Devon Payne
wiley   +1 more source

New Cocrystals of Ligustrazine: Enhancing Hygroscopicity and Stability

Molecules
Ligustrazine (TMP) is the main active ingredient extracted from Rhizoma Chuanxiong, which is used in the treatment of cardiovascular and cerebrovascular diseases, with the drawback of being unstable and readily sublimated.
Yifei Xie, Lixiang Gong, Yue Tao, Baoxi Zhang, Li Zhang, Shiying Yang, Dezhi Yang, Yang Lu, Guanhua Du   +8 more
doaj   +1 more source

Separation of p-Aminobenzoic Acid by Reactive Extraction in the Presence of 1-Octanol as Phase Modifier [PDF]

, 2010
The paper presents the studies on reactive extraction of p-aminobenzoic acid with two extractants (Amberlite LA-2 and D2EHPA) dissolved in two solvents with different dielectric constants (n-heptane, dichloromethane), at various 1-octanol concentrations ...
A.-I. Galaction, D. Caşcaval, L. Kloetzer   +2 more
core   +1 more source