Results 81 to 90 of about 24,310 (250)

Development of a special purpose spacecraft interior coating, phase 3 [PDF]

open access: yes
A variety of intumescent coatings based on a fluorocarbon latex resin modified with either an acrylic resin or an epoxy resin were prepared. Several intumescent systems were used for these studies including some based on ammonium polyphosphate and others
Gillman, H. D., Nannelli, P.
core   +1 more source

Acidosis potentiates endothelium-dependent vasorelaxation and gap junction communication in the superior mesenteric artery. [PDF]

open access: yes, 2018
Extracellular pH is an important physiological determinant of vascular tone that is normally maintained within 7.35-7.45. Any change outside this range leads to severe pathological repercussions.
Mohanty, Ipsita   +3 more
core   +2 more sources

Copper‐Catalyzed Markovnikov Hydroboration of Alkenes via Hydrogen Atom Transfer (MHAT)

open access: yesAdvanced Synthesis &Catalysis, Volume 368, Issue 3, 3 February 2026.
The copper‐catalyzed Markovnikov hydroboration of alkenes is disclosed. Remarkably, this methodology operates at mild reaction conditions and delivers high catalytic efficiency (TONs and TOFs up to 2800 and 2600 h‐1, respectively). Furthermore, this approach diverges from previous reports by relying on two subsequent hydrogen‐atom‐transfer processes ...
Antonio Torres‐Calis   +1 more
wiley   +1 more source

Synthesis and antibacterial activity of some heterocyclic derivatives of sulfanilamide

open access: yesBulletin of the Chemical Society of Ethiopia, 2012
Considering the promising antimicrobial potential of carbonic anhydrase inhibitors and heterocyclic compounds some heterocyclic derivatives of sulfanilamide (2a-e) were synthesized.
B.B. Subudhi, G. Ghosh
doaj  

Chronoprints: Identifying Samples by Visualizing How They Change over Space and Time. [PDF]

open access: yes, 2019
The modern tools of chemistry excel at identifying a sample, but the cost, size, complexity, and power consumption of these instruments often preclude their use in resource-limited settings.
Brisk, Philip   +4 more
core   +3 more sources

Synthesis, Characterization, Biological Properties, and Sensor Applications of Novel Thiosemicarbazone Derivatives

open access: yesBiotechnology and Applied Biochemistry, Volume 73, Issue 1, Page 14-27, February 2026.
ABSTRACT In this study, novel thiosemicarbazone derivative molecules (5a–j) were synthesized. The characterization of the synthesized molecules was carried out using 1H–, 13C–NMR, FT–IR, and Q–TOF spectroscopic techniques. Then, the inhibitory effect of these compounds was examined for human carbonic anhydrase I and II (hCA I, and II) and ...
Hayreddin Gezegen   +4 more
wiley   +1 more source

Spectrophotometric Determination of Ceftiofur Hydrochloride Using N-Bromosuccinimide and p-Dimethylaminobenzaldehyde

open access: yesE-Journal of Chemistry, 2009
Simple, accurate and reproducible UV-Visible spectrophotometric methods were established for the assay of ceftiofur based on the formation of oxidation and condensation products.
V. Annapurna   +3 more
doaj   +1 more source

A Comprehensive Review of Acne Treatments: Unpacking the Chemical Structures and Effective Bioactive Compounds

open access: yesHealth Science Reports, Volume 9, Issue 2, February 2026.
ABSTRACT Background and Aims Acne vulgaris is a frequent skin disorder, affecting a large part of the population worldwide, and strongly influencing not only the physical but also the mental aspects of health. The choice of therapy for acne vulgaris is a very difficult one because the multifactorial causality of the disease and interindividual ...
Mobina Tajdari   +5 more
wiley   +1 more source

Transfer of Sulfamethazine from Contaminated Beeswax to Honey [PDF]

open access: yes, 2010
A liquid chromatographic tandem mass spectrometric method for the determination of sulfa drugs in beeswax was developed. When performing residue control on beeswax intended for the fabrication of wax foundations, residues of sulfonamides were found.
Daeseleire, Els   +3 more
core   +1 more source

Validasi Metode dan Penetapan Kadar Nitrit (NO2) pada Hasil Rebusan Sayuran Hijau (Kangkung, Brokoli, Seledri) Menggunakan Spektrofotometer UV-Vis [PDF]

open access: yes, 2017
Telah dilakukan penelitian tentang penetapan kadar nitrit (NO2) pada beberapa sayuran yaitu kangkung, brokoli, dan seledri. Sayur kangkung diperoleh dari kebun warga daerah Kenten, Palembang, sedangkan sayur brokoli dan seledri diperoleh dari salah satu ...
Meidalena, T. (Tria)   +1 more
core  

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