Results 81 to 90 of about 37,620 (277)

Folin-Ciocalteau Reagent for Polyphenolic Assay

, 2014
The chemistry of the Folin-Ciocalteu is described and two Folin assays (single and dual reagent) are described for the assay of phenols and polyphenols with respect to experimental detail and critically evaluated for pure compounds and for mixtures ...
Gabriel A Agbor, Patrick E. Donnelly, Joe A Vinson   +2 more
core   +1 more source

Sensitive and selective spectrophotometric assay of doxycycline hyclate in pharmaceuticals using Folin-Ciocalteu reagent [PDF]

, 2020
Doxycycline hyclate (DOX), chemically known as (4S,4aR,5S,5aR,6R,12aS)-4-(dimethylamino)-3,5,10,12,12a-pentahydroxy-6-methyl-1,11-dioxo-1,4,4a,5,5a,6,11,12a-octahydrotetracene-2-carboxamide hydrochloride hemiethanol hemihydrate The drug is official in ...
Pavagada Jagannathamurthy, Ramesh Kanakapura Basavaiah, Nagaraju Rajendraprasad   +2 more
core  

Effect of gamma irradiation and storage days on physicochemical, sensory, and microbial quality of pineapple (Ananas comosus) fresh cut under refrigeration

JSFA reports, EarlyView.
Abstract Background Fresh‐cut pineapple is increasingly consumed for its convenience and nutritional value; however, minimal processing accelerates quality deterioration and microbial growth, resulting in substantial postharvest losses. Gamma irradiation is recognized as a nonthermal preservation technique, but limited information exists regarding its ...
Maraj Miah, Mohammad Abdulla Al Noman, Md Abdul Alim, Md. Nazmul Hasan Mehedi, Nehal Uddin, Mahmuda Tasnim, Md. Nahidul Islam   +6 more
wiley   +1 more source

Optimized Folin–Ciocalteu Method for Determination of Total Polyphenols in Medicinal Plants of the Peruvian Amazon: Validation and Application to Twelve Species

AppliedChem
The Folin–Ciocalteu method remains the standard approach for quantifying total phenolics in plant extracts; however, matrix-specific optimization is essential for obtaining accurate results for chemically complex botanical materials.
Liliana Ruiz-Vasquez, Lastenia Ruiz Mesia, Martha M. Maco, Jeef A. Zapata, Hivelli Ricopa Cotrina, Marianela Cobos, Viviana Pinedo-Cancino, Fernando Tello, Juan C. Castro   +8 more
doaj   +1 more source

Yield of Polyphenolic Substances Extracted From Spruce (Picea abies) Bark by Microwave-Assisted Extraction

BioResources, 2016
Closed-system microwave-assisted extraction was applied to extract total phenolics from spruce (Picea abies) bark, using 96.6% ethanol as an extractant.
Alexandra Sládková, Martina Benedeková, Ján Stopka, Igor Šurina, Aleš Ház, Petra Strižincová, Katarína Čižová, Andrea Škulcová, Zuzana Burčová, František Kreps, Jozef Šima, Michal Jablonský   +11 more
doaj   +1 more source

Phenolic composition and multi‐target bioactivities of Globularia alypum extracts across seasons

JSFA reports, EarlyView.
Abstract Background This study investigates the influence of seasonal variation on the phytochemical profile and biofunctional activities of ethanolic leaf extracts from Globularia alypum. Leaves collected across four seasons were extracted with a hydroethanolic solvent (80:20, v/v) and analyzed by LC‐ESI‐MS/MS.
Mohammed Messaoudi, Khalil Guelift, Mokhtar Benmohamed, Khaled Kherraz, Latifa Khattabi, Afaf Khadra Bendrihem, Khaled Aggoun, Barbara Sawicka, Lilya Harchaoui, Mohamed Amine Ferhat, Salah Neghmouche Nacer, Stefania Garzoli   +11 more
wiley   +1 more source

Folin-Ciocalteu assay as a rapid colourimetric screening method for evaluating PAH degradation abilities of heterotrophic bacteria. [PDF]

3 Biotech, 2023
Bhatawadekar VC, Damare SR, Garg A.
europepmc   +1 more source

Fermentation characteristics of four southern sichuan citrus cultivars

JSFA reports, EarlyView.
Abstract Background Sichuan, China's leading citrus‐producing region has strong potential for citrus wine development. Citrus is rich in bioactive compounds that enhance flavor and health value, yet current citrus wines often show weak aroma and bitterness.
Zhiqing Zheng, Cong Li, Jun Zhao, Yi Ma, Jiaming Cui, Tian Zheng, Bin Guo, Tong Lin, Chun Yi, Xingyin Zhang   +9 more
wiley   +1 more source

Influence of different drying techniques on the quality and physicochemical properties of Ghana‐sourced turmeric (Curcuma longa L.) samples

JSFA reports, EarlyView.
Abstract Background This study evaluated the influence of four drying techniques—freeze drying (FZD), microwave drying (MCD), oven drying (OVD), and sun drying (SUD)—on the bioactive, nutritional, and physical properties of turmeric. Using standard analytical procedures, the samples were examined for antioxidant activity (DPPH and ABTS assays), total ...
Eric Antiri Aforo, Richard Osae, Maurice Tibiru Apaliya, Irene Akua Idun, Emmanuel Kwaw, Raphael N. Alolga, Francis Appiah   +6 more
wiley   +1 more source

PENETAPAN KANDUNGAN FENOLAT TOTAL DAN UJI AKTIVITAS ANTIOKSIDAN MENGGUNAKAN RADIKAL DPPH FRAKSI ETIL ASETAT SARI BUAH APEL BELUDRU (Diospyros blancoi A. DC.)

Jurnal Farmasi Sains dan Komunitas, 2016
: Antioxidant plays a role in inhibiting oxidation by binding to free radicals. As a result, the cell damage that leads to degenerative diseases can be inhibited.
Johannes Baptista Yunio Rahmawan, Yohanes Dwiatmaka   +1 more
doaj   +1 more source