A5028446632- Phytochemicals and Antioxidant Activities
- Natural product bioactivities and synthesis
- Phytochemistry and Biological Activities
- Natural Compound Pharmacology Studies
- Phytoestrogen effects and research
- Estrogen and related hormone effects
- Essential Oils and Antimicrobial Activity
- Fermentation and Sensory Analysis
- Bioactive natural compounds
- Menopause: Health Impacts and Treatments
- Plant biochemistry and biosynthesis
- Antioxidant Activity and Oxidative Stress
- Biochemical Analysis and Sensing Techniques
- Traditional Chinese Medicine Analysis
- Toxin Mechanisms and Immunotoxins
- Natural Antidiabetic Agents Studies
- Traditional and Medicinal Uses of Annonaceae
- Tea Polyphenols and Effects
- Hops Chemistry and Applications
- Genomics, phytochemicals, and oxidative stress
- Ethnobotanical and Medicinal Plants Studies
- Ginseng Biological Effects and Applications
- Biological Activity of Diterpenoids and Biflavonoids
- Horticultural and Viticultural Research
- Phytochemical Studies and Bioactivities
City University of New York
2016-2025
The Graduate Center, CUNY
2016-2025
Lehman College
2016-2025
Minzu University of China
2012-2021
University of Miami
2002-2010
Columbia University
2003-2008
Kunming Institute of Botany
2006
University of Maryland, College Park
2005
Columbia University Irving Medical Center
2005
Herbert Irving Comprehensive Cancer Center
2005
Activity-guided fractionation of a methanol extract from the fruit Manilkara zapota cv. Tikal resulted in isolation two new antioxidants, methyl 4-O-galloylchlorogenate (1) and 4-O-galloylchlorogenic acid (2), along with eight known polyphenolic namely, chlorogenate (3), dihydromyricetin (4), quercitrin (5), myricitrin (6), (+)-catechin (7), (−)-epicatechin (8), (+)-gallocatechin (9), gallic (10). Of 10 polyphenols, 1 showed highest antioxidant activity (IC50 = 12.9 μM)...
Abstract: Recent investigations have associated white teas with anti‐carcinogenic, immune‐boosting, and antioxidative properties that may impact human health in a manner comparable to green teas. An in‐depth chemical analysis of tea types was conducted quantify polyphenols antioxidant potential 8 commercially available teas, compare them tea. Extraction HPLC protocols were optimized validated for the quantification 9 phenolic 3 methylxanthine compounds examine inter‐ intra‐variation...
Many dark-colored fruit juices, rich in anthocyanins, are thought to be important for human health. Joboticaba (Myrciaria cauliflora) fruits, native Brazil, have phenolics including anthocyanins and processed into juice other products. The phenolic constituents the fruits of jaboticaba were studied by high-performance liquid chromatography coupled with electrospray ionization time-of-flight mass spectrometry. Twenty-two compounds identified or tentatively determined detailed analysis their...
The banana passion fruit (Passiflora tripartita Breiter, Passifloraceae) known as “tumbo” is very appreciated in tropical and subtropical countries of South America. Methanolic extracts from peel the juice P. growing Chile were analyzed for antioxidant capacity well flavonoid phenolic content. A chromatographic method was developed rapid identification main phenolics samples by HPLC-DAD HPLC-MS. fast fingerprint analysis allowed detection eighteen C-glycosides four O-glycoside derivatives...
Climate change is impacting agro-ecosystems, crops, and farmer livelihoods in communities worldwide. While it well understood that more frequent intense climate events many areas are resulting a decline crop yields, the impact on quality less acknowledged, yet critical for food systems benefit both farmers consumers through high-quality products. This study examines tea (Camellia sinensis; Theaceae), world's most widely consumed beverage after water, as system to measure effects of seasonal...
The anthocyanin composition and HPLC fingerprints of six small berries endemic the VIII region Chile were investigated using high resolution mass analysis for first time (HR-ToF-ESI-MS). antioxidant features species compared, including a variety blueberries which is one most commercially significant berry crops in Chile. obtained fruits compared correlated with measured by bleaching DPPH radical, ferric reducing power (FRAP), superoxide anion scavenging activity assay (SA), total content...
Chrysophyllum cainito L. (Sapotaceae), known commonly as star apple or caimito, is a tropical tree that bears edible fruits. The fruits are grown commercially in certain and subtropical areas, such southern Florida. In this study, the fresh were extracted with methanol partitioned hexane ethyl acetate sequentially. soluble fraction displayed high antioxidant activity 1,1-diphenyl-2-picrylhydrazyl (DPPH) assay (IC50 = 22 μg/mL). Activity-guided fractionation of was performed to identify...
A new depside, jaboticabin (1), together with 17 known compounds were isolated from the fruit of jaboticaba (Myrciaria cauliflora). The structure 1 was elucidated by spectroscopic data interpretation. Known identified comparison their literature values or to authentic standards. Compound and related depside 2-O-(3,4-dihydroxybenzoyl)-2,4,6-trihydroxyphenylacetic acid (2) significantly inhibited chemokine interleukin (IL)-8 production before after cigarette smoke treatment cells. cytotoxic in...
Many fruits of the Myrtaceae have a rich history use both as edibles and traditional medicines in divergent ethnobotanical practices throughout tropical subtropical world. From South America to Southeast Asia, these been used for wide variety ailments, including cough, diabetes, dysentery, inflammation ringworm. These same are also make many food products. Based on information regarding ethnomedical use, known phytochemistry, fruit color, popularity availability, several edible species from...
A MeOH extract of Garcinia xanthochymus fruits was subjected to activity-guided fractionation, yielding two new benzophenones, guttiferone H (1) and gambogenone (2). Compound 1 contains a seven-membered ring attached the bicyclo[3.3.1]nonane system at positions 7 8 displayed cytotoxicity in SW-480 colon cancer cell line (IC50 = 12 μM). 2 has novel benzophenone bicyclo[3.3.2]decane 188 Both induced apoptosis cells antioxidant activity 1,1-diphenyl-2-picrylhydrazyl (DPPH) assay 64 38.7 μM,...