News Update on Phenolic Content Research: Oct – 2019

Antioxidant activity and phenolic content of selected fruit seeds

The total inhibitor capability and synthetic resin content of edible parts and seeds of avocado, jackfruit, longan, mango and tamarind were studied. additionally, the link between inhibitor activity, synthetic resin content and also the totally different degrees of heating of mango seed kernel was investigated. The seeds showed a way higher inhibitor activity and synthetic resin content than the edible parts. The contribution of all the fruit seed fractions to the full inhibitor activity and synthetic resin content was forever >70%. ABTS ion radical-scavenging and FRAP assays were utilized for the determination of inhibitor activity; FCR assay was accustomed live the full synthetic resin content. [1]

Anti‐oxidant activity and total phenolic content of some Asian vegetables

The anti‐oxidant activity of extracts from thirty six vegetables was evaluated by employing a model system consisting of β‐carotene and polyunsaturated fatty acid. the whole phenolics of the extracts made up our minds spectrophotometrically in step with the Folin–Ciocalteau procedure and ranged from thirty four to 400 mg (100 g)−1 on a contemporary weight basis. Mint, aonla, black carrots, Chenopodium, fenugreek, kachnar and ginger had high phenoplast contents. The anti‐oxidant activity expressed as per p.c inhibition of oxidization ranged from a high of ninety two in turmeric extracts to a coffee of twelve.8% in long melon. [2]

Phenolic Content and Antioxidant Capacity of Muscadine Grapes

Fruits of ten cultivars of muscadine grapes (five bronze skin and 5 purple skin) grownup in southern Georgia were separated into skin, seed, and pulp. every fruit half and also the leaves from the corresponding varieties were extracted for HPLC analysis of major phenolics. Total phenolics were determined colorimetrically victimisation Folin−Ciocalteu chemical agent. Total anthocyanins were determined consistent with a pH-differential methodology, employing a UV−visible photometer. inhibitor capability was resolute by the Trolox equivalent inhibitor capability (TEAC) assay. acid, (+)-catechin, and epicatechin were the key phenolics in seeds, with average values of six.9, 558.4, and 1299.4 mg/100 g of recent weight (FW), severally. [3]

Modified expression of ZmMYB167 in Brachypodium distachyon and Zea mays leads to increased cell wall lignin and phenolic content

One of the challenges to modify targeted modification of lignocellulosic biomass from grasses for improved biofuel and organic chemistry production lies inside our restricted understanding of the transcriptional management of electric cell wall synthesis. Here, we have a tendency to investigated the role of the maize MYB transcription issue ZmMYB167 in electric cell wall synthesis and the way changed ZmMYB167 expression in 2 distinct grass model species affects plant biomass and growth phenotypes. Heterologous expression of ZmMYB167 within the C3 model system Brachypodium semiconductor diode to gentle dwarf phenotypes, enhanced polymer (~7% to 13%) and S-lignin compound (~11% to 16%) content, elevated concentrations of cell wall-bound p-coumaric acid (~15% to 24%) and reduced biomass sugar unleash (~20%) compared to controls. [4]

Investigation of Phenolic Content, Antioxidant Capacities, Anthelmintic and Cytotoxic Activities of Thymus zygioides Griseb

Aims: This study was designed to guage the full phenolic resin, flavonoid content and inhibitor properties of assorted extracts (ethanol, methanol, acetone, water) of Thymus zygioides and therefore the the} grain alcohol extract was also investigated for phenolic resin parts, anthelmintic and cytotoxic activities.

Materials and Methods: The inhibitor capacities of the extracts were examined for radical scavenging activities (DPPH, ABTS), inhibitor activities (β-carotene/linoleic assessment system, phosphomolybdenum method), power reducing and metal chelating activities. The phenolic resin content of the grain alcohol extract decided victimisation HPLC. The branchiopodan morbidity take a look at was accustomed screen for potential cytotoxic activity. Anthelmintic activity was evaluated victimisation the vivarium worm, Tubifex tubifex. [5]

Reference

[1] Soong, Y.Y. and Barlow, P.J., 2004. Antioxidant activity and phenolic content of selected fruit seeds. Food chemistry, 88(3), (Web Link)

[2] Kaur, C. and Kapoor, H.C., 2002. Anti‐oxidant activity and total phenolic content of some Asian vegetables. International Journal of Food Science & Technology, 37(2), (Web Link)

[3] Pastrana-Bonilla, E., Akoh, C.C., Sellappan, S. and Krewer, G., 2003. Phenolic content and antioxidant capacity of muscadine grapes. Journal of agricultural and food chemistry, 51(18), (Web Link)

[4] Modified expression of ZmMYB167 in Brachypodium distachyon and Zea mays leads to increased cell wall lignin and phenolic content
Rakesh Bhatia, Sue Dalton, Luned A. Roberts, Odin M. Moron-Garcia, Rosario Iacono, Ondrej Kosik, Joe A. Gallagher & Maurice Bosch
Scientific Reportsvolume 9, Article number: 8800 (2019) (Web Link)

[5] Kaska, A., Çiçek, M., Deniz, N. and Mammadov, R. (2018) “Investigation of Phenolic Content, Antioxidant Capacities, Anthelmintic and Cytotoxic Activities of Thymus zygioides Griseb.”, Journal of Pharmaceutical Research International, 21(1), (Web Link)