Results 81 to 90 of about 3,798 (181)

TRYPANOSOMA-CRUZI TRANS-SIALIDASE and NEURAMINIDASE ACTIVITIES CAN BE MEDIATED BY the SAME ENZYMES [PDF]

open access: yes, 1992
Trans-sialidase and neuraminidase activities have been detected on the surface membrane of trypomastigotes of Trypanosoma cruzi, and both have been implicated in the parasite's invasion of host cells.
Decarvalho, L. P.   +2 more
core   +2 more sources

Uncovering the Key Factors Influencing Phytochemical and Phytopharmacological Properties During Medicinal Plant Processing

open access: yeseFood, Volume 7, Issue 1, February 2026.
From farm to pharma, this review details the engineering of quality in medicinal plants through a science‐driven approach: it first elucidates how genetic and environmental factors inscribe the plant's phytochemical and phytopharmacological profile before harvest, and then dissects the postharvest techniques and technologies—chemical and thermal pre ...
Elyas Aryakia
wiley   +1 more source

Umbelliferone Inhibits Spermatogenic Defects and Testicular Injury in Lead-Intoxicated Rats by Suppressing Oxidative Stress and Inflammation, and Improving Nrf2/HO-1 Signaling

open access: yesDrug Design, Development and Therapy, 2020
Mohammed F Alotaibi,1 Fakhria Al-Joufi,2 Howida S Abou Seif,3 Mohammed A Alzoghaibi,1 Laiche Djouhri,4 Ahmad F Ahmeda,5 Ayman M Mahmoud6 1Physiology Department, College of Medicine, King Saud University, Riyadh 11461, Saudi Arabia; 2Department of ...
Alotaibi MF   +6 more
doaj  

Quantitative analysis of phenolic compounds in crude extracts of Myrcia splendens leaves by HPLC-ESI-MS/MS

open access: yesRodriguésia, 2020
Myrcia splendens is popularly known as “guamirim-de-folha-miúda”, and its occurrence ranges from Mexico to southern Brazil. The aim of this work was to identify and quantify phenolic compounds in the crude hydroalcoholic (EBH), ethyl acetate (EBAE) and ...
Camila Jeriane Paganelli   +4 more
doaj   +1 more source

Isolation, identification, and cytotoxicity evaluation of phytochemicals from chloroform extract of Spathodea campanulata

open access: yesFuture Journal of Pharmaceutical Sciences, 2021
Background Spathodea campanulata P. Beauv. known as the African tulip tree has potential medicinal properties that have been shown traditionally for the treatment of various ailments.
Anita Wagh, Santosh Butle, Dipak Raut
doaj   +1 more source

Counter-current Chromatography for the Purification of High Value Natural Compounds: Performance Modelling and Solvent Selection

open access: yes, 2011
Counter-current chromatography (CCC) is a separation technique, which utilises two immiscible liquid phases in equilibrium as stationary and mobile phases. It emerged in the 1970s and had been primarily used in academia.
Guzlek, Hacer, Guzlek, Hacer
core   +1 more source

Integrated green extraction of phenolic compounds and fermentable sugars from grapefruit peel using ultrasound and enzymatic hydrolysis

open access: yesJournal of the Science of Food and Agriculture, Volume 106, Issue 3, Page 1839-1851, February 2026.
Abstract BACKGROUND Valorizing sugar‐rich food waste in biorefineries offers a sustainable route to bio‐based products. Grapefruit peel (GP), representing about 50% of the fruit's weight, is rich in sugars (soluble and insoluble) and polyphenols such as flavonoids.
María del Prado García‐Aparicio   +2 more
wiley   +1 more source

Polysaccharide-derived mesoporous materials (Starbon®) for sustainable separation of complex mixtures [PDF]

open access: yes, 2017
The recovery and separation of high value and low volume extractives are a considerable challenge for the commercial realisation of zero-waste biorefineries.
Borisova, Aleksandra   +9 more
core   +1 more source

Changes in cell ultrastructure and morphology of Arabidopsis thaliana roots after coumarins treatment

open access: yesActa Societatis Botanicorum Poloniae, 2014
The ultrastructure and morphology of roots treated with coumarin and umbelliferone as well as the reversibility of the coumarins effects caused by exogenous GA, were studied in Arabidopsis thaliana.
Ewa Kupidłowska
doaj   +1 more source

Chemical Constituents of Leaves and Barks of Melicope Hookeri T.G. Hartley [PDF]

open access: yes, 2006
Phytochemical investigation on the leaves and bark of Melicope hookeri T.G. Hartley (Rutaceae) has resulted in the isolation and identification of three flavonoids, ayanin, ombuin and kumatakenin, two coumarins, umbelliferone and scopoletin and p ...
Ali, Abdul Manaf   +6 more
core  

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