Results 91 to 100 of about 26,428 (238)

Synthesis of Calix[4]resorcinarene Based Dyes and its Application in Dyeing of Fibres

E-Journal of Chemistry, 2008
Four new ʻupper rimʼ azocalix[4]resorcinarene have been synthesized by coupling calix[4]resorcinarene with different diazotized aromatic compounds of sulphanilic acid, anthranilic acid, o-aminophenol and p-aminobenzoic acid.
Vinod K. Jain, Shibu G. Pillai, Parin H. Kanaiya   +2 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

Coenzyme Q10 deficiencies: pathways in yeast and humans. [PDF]

, 2018
Coenzyme Q (ubiquinone or CoQ) is an essential lipid that plays a role in mitochondrial respiratory electron transport and serves as an important antioxidant.
Awad, Agape M, Bradley, Michelle C, Clarke, Catherine F, Fernández-Del-Río, Lucía, Nag, Anish, Tsui, Hui S   +5 more
core  

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

Rational Design of Pore Size and Functionality in a Series of Isoreticular Zwitterionic Metal-Organic Frameworks [PDF]

, 2018
The isoreticular expansion and functionalization of charged-polarized porosity has been systematically explored by the rational design of 11 isostructural zwitterionic metal-organic frameworks (ZW-MOFs).
Aulakh, D, Bagundes, VF, Duell, K, Farha, OK, Islamoglu, T, Joy, M, Teat, SJ, Varghese, JR, Wriedt, M   +8 more
core   +13 more sources

Sensitive determination of buformin using poly-aminobenzoic acid modified glassy carbon electrode

Journal of Pharmaceutical Analysis, 2012
Glassy carbon electrode, which is used to electrochemically determine the content of buformin, is modified with an electropolymerized film of p-aminobenzoic acid in pH 7.0 acetate buffer solution (ABS).
Gui-Ying Jin, Hui Li, Wan-Bang Xu
doaj  

Folate status of gut microbiome affects Caenorhabditis elegans lifespan

BMC Biology, 2012
In a paper in BMC Biology Virk et al. show that Caenorhabditis elegans lifespan is extended in response to a diet of folate-deficient Escherichia coli. The deficiencies in folate biosynthesis were due to an aroD mutation, or treatment of E.
Nguyen Theresa PT, Clarke Catherine F
doaj   +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

PorA of the Type IX Secretion Is a Ligand of the PorXY Two‐Component Regulatory System in Porphyromonas gingivalis

Molecular Microbiology, Volume 123, Issue 6, Page 569-585, June 2025.
Porphyromonas gingivalis exports several virulent proteins, including gingipain proteinases, via the type 9 secretion system. Expression of several T9SS component proteins is regulated by the PorA‐PorY‐PoX‐SigP signaling cascade. This study presents a novel role of PorA in the signaling cascade.
Momoko Ito, Hideharu Yukitake, Paul D. Veith, Dhana G. Gorasia, Takashi Tominaga, Yuko Sasaki, Eric C. Reynolds, Koji Nakayama, Mariko Naito, Mikio Shoji   +9 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