Results 51 to 60 of about 20,144 (188)

Quality Control Strategies for Differentiation of Kalanchoe Species

open access: yesPhytochemical Analysis, Volume 36, Issue 8, Page 2385-2400, December 2025.
ABSTRACT Kalanchoe species products are commercially available in local markets and by internationally accessible online retailers and may exhibit quality issues because of misidentification from similar common names and anatomical similarities among related species used as feedstock. This study proposes an approach using UPLC‐MS/MSE and HPTLC, coupled
Evelyn A. de Andrade   +8 more
wiley   +1 more source

CD and FTIR Spectroscopic Studies of Carbohydrate-modified Opioid Peptides [PDF]

open access: yes, 2008
The variety of vital functions played by glycoproteins in many physiological and pathological processes inspired the design of glycopeptides and the study of the effect of glycosylation on conformation.
Hollosi, Miklos   +3 more
core   +1 more source

Use of time-of-flight mass spectrometry for large screening of organic pollutants in surface waters and soils from a rice production area in Colombia [PDF]

open access: yes, 2012
The irrigate district of Usosaldaña, an important agricultural area in Colombia mainly devoted to rice crop production, is subjected to an intensive use of pesticides.
Botero-Coy, Ana Maria   +7 more
core   +2 more sources

The Concise Guide to PHARMACOLOGY 2025/26: G protein‐coupled receptors

open access: yesBritish Journal of Pharmacology, Volume 182, Issue S1, Page S24-S151, December 2025.
The Concise Guide to Pharmacology 2025/26 marks the seventh edition in this series of biennial publications in the British Journal of Pharmacology. Presented in landscape format, the guide provides a comparative overview of the pharmacology of drug target families. The concise nature of the Concise Guide refers to the style of presentation, being clear,
Stephen P. H. Alexander   +206 more
wiley   +1 more source

Double labelling immunohistochemical characterization of autonomic sympathetic neurons innervating the sow retractor clitoridis muscle [PDF]

open access: yes, 2008
Retrograde neuronal tracing and immunohistochemical methods were used to define the neurochemical content of sympathetic neurons projecting to the sow retractor clitoridis muscle (RCM). Differently from the other smooth muscles of genital organs, the RCM
Acone, Franca   +6 more
core  

Maternal and Placental Inflammation Influence Formation of Neural Tube Defects in Quaternary Ammonium Compound Exposed Mice

open access: yesBirth Defects Research, Volume 117, Issue 11, November 2025.
ABSTRACT Background Quaternary ammonium compounds (QACs) are common chemicals used for their antimicrobial, antistatic, and surfactant properties. Two common QACs, alkyldimethylbenzyl ammonium chloride (ADBAC or BAC) and didecyldimethyl ammonium chloride (DDAC), cause neural tube defects (NTDs) in mice and are proinflammatory in both mice and humans ...
Justin Kula   +6 more
wiley   +1 more source

Importance of MS selectivity and chromatographic separation in LC-MS/MS-based methods when investigating pharmaceutical metabolites in water. Dipyrone as a case of study. [PDF]

open access: yes, 2012
Pharmaceuticals are emerging contaminants of increasing concern because of their presence in the aquatic environment and potential to reach drinking-water sources.
GRACIA LOR, EMMA   +3 more
core   +2 more sources

The Effect of Exogenously Applied Dicarboxylic Acids (Photon) on the Maize (Zea mays) Metabolite Profile

open access: yesChemistry &Biodiversity, Volume 22, Issue 11, November 2025.
ABSTRACT Maize is an important crop worldwide with approximately 1200 million tons consumed and a market size worth $143 billion. Environmental stress influence production of crops and mitigating these ensures optimum production. Dicarboxylic acids are known as emulsifying agents that mitigate various stresses in plants.
Mhlonipheni Msomi   +3 more
wiley   +1 more source

Met-enkephalin-induced mobilization of intracellular Ca2+ in rat intracardiac ganglion neurones [PDF]

open access: yes, 1999
The effects of Met-enkephalin on Ca2+-dependent K+ channel activity were investigated using the cell-attached patch recording technique on isolated parasympathetic neurones of rat intracardiac ganglia. Large-conductance, Ca2+-dependent K+ channels (BKCa)
Adams   +18 more
core   +1 more source

New analogues of leucine-methionine-enkephalin

open access: yesJournal of Biosciences, 1988
Nine analogues of the opioid pentapeptides leucine-/ methionine-enkephalinamide, involving replacement of amino acid at position 5 or amino acids at positions 2 and 5, have been synthesized by the solid phase method using mainly 9-fluorenylmethyloxycarbonyl amino acid trichlorophenyl esters in the presence of 1-hydroxybenzotriazole, the solid support ...
Sivanandaiah, K.M.   +2 more
openaire   +2 more sources

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