scholarly journals Analysis of Selected Phenolic Compounds in Organic, Pesticide-Free, Conventional Rice (Oryza sativa L.) Using LC-ESI-MS/MS

Molecules ◽  
2018 ◽  
Vol 24 (1) ◽  
pp. 67 ◽  
Author(s):  
Mayakrishnan Prabakaran ◽  
Ill-Min Chung ◽  
Na-Young Son ◽  
Hee-Youn Chi ◽  
So-Yeon Kim ◽  
...  
Keyword(s):  
Oryza Sativa ◽  
Phenolic Compounds ◽  
Oryza Sativa L ◽  
Farming System ◽  
Free Radical Scavengers ◽  
Coumaric Acid ◽  
Radical Scavengers ◽  
Organic Rice ◽  
Polished Rice ◽  
Phenolic Profiles

Rice (Oryza sativa L.) contains generous amounts of carbohydrates, proteins, vitamins, and dietary fibers, in addition to secondary metabolites such as phenols and flavonoids that act as antioxidants. The phenolic compounds detected in rice (organic rice (OR), conventional rice (CR), and pesticide-free rice (PFR)), namely, protocatechuic, gentisic, p-hydroxybenzoic, p-coumaric, ferulic, salicylic, and caffeic acids, are notable free radical scavengers. The sum of these phenolic compounds was found to be higher in PFR, followed by CR and OR (p < 0.0001), when the rice types were classified based on the farming system employed. In addition, significant differences were observed in the p-hydroxybenzoic acid levels for the OR and CR groups compared with the PFR groups (p < 0.01). Furthermore, greater quantities of p-coumaric acid were found in CR-08 and OR-02, although these groups contained overall higher and lower sums of phenolic compounds, respectively. Moreover, significance was observed in the sum of the phenolic compounds, although only small quantities were found in polished rice. Further research is thus required to provide a clearer picture regarding the phenolic profiles of different rice brands.

Comparative study of phenolic compounds in different Brazilian rice (Oryza sativa L.) genotypes

2009 ◽  
Vol 22 (5) ◽  
pp. 405-409 ◽  
Author(s):  
Nádia Valéria Mussi de Mira ◽  
Isabel Louro Massaretto ◽  
Cristina de Simone Carlos Iglesias Pascual ◽  
Ursula Maria Lanfer Marquez
Keyword(s):  
Oryza Sativa ◽  
Phenolic Compounds ◽  
Comparative Study ◽  
Oryza Sativa L

scholarly journals Stable Mercury Isotopes in Polished Rice (Oryza sativa L.) and Hair from Rice Consumers

2017 ◽  
Vol 51 (11) ◽  
pp. 6480-6488 ◽  
Author(s):  
Sarah E. Rothenberg ◽  
Runsheng Yin ◽  
James P. Hurley ◽  
David P. Krabbenhoft ◽  
Yuyun Ismawati ◽  
...  
Keyword(s):  
Oryza Sativa ◽  
Oryza Sativa L ◽  
Polished Rice ◽  
Mercury Isotopes

scholarly journals Increasing Rice (Oryza sativa L.) Productivity and Farmer’s Income through the Implementation of Modified Double Rows Planting System

2021 ◽  
pp. 42-52
Author(s):  
Robet Asnawi ◽  
Ratna W. Arief ◽  
. Slameto ◽  
Reny D. Tambunan ◽  
. Martias ◽  
...  
Keyword(s):  
Oryza Sativa ◽  
Oryza Sativa L ◽  
New Technology ◽  
Farming System ◽  
Economic Feasibility ◽  
Cost Ratio ◽  
Rice Varieties ◽  
Benefit Cost Ratio ◽  
Two Factors ◽  
Planting System

Rice (Oryza sativa L.) productivity in Indonesia is leveling off. The study aims to determine the effect of the Jejer Manten double rows modified planting system on the growth, productivity, and economic feasibility of the rice farming system. The study was conducted in Lampung Province, Indonesia from 2016 to 2018. The study was arranged using a split-plot design with 3 replications. The treatment consisted of two factors namely: planting system (S1 = Jajar Tegel, S2 = Jajar Legowo double rows 2:1, and S3 = Jejer Manten double rows modification) and rice varieties (V1 = Ciherang; V2 = Inpari 10).The results of the study showed that the Jejer Manten planting system produced higher growth and productivity than Jajar Tegel and Jajar Legowo planting system. During the three years of research, the application of the Jejer Manten planting system increased productivity by 6.04-32.27% compared to Jajar Tegel and 13.78-28.92% compared to the Jajar Legowo planting system. Economically, based on the analysis of marginal benefit-cost ratio (MBCR), the application of the Jejer Manten planting system was more feasible than the Jajar Tegel planting system (MBCR = 6.32) and Jajar Legowo planting system (MBCR = 8.18). Based on these results, it is recommended to apply the Jejer Manten planting system as a new technology to increase rice production and support of food self-sufficiency program of Indonesia.

scholarly journals Polyphenol and flavonoid profiles and radical scavenging activity in leafy vegetable Amaranthus gangeticus

2020 ◽  
Vol 20 (1) ◽  
Author(s):  
Umakanta Sarker ◽  
Shinya Oba
Keyword(s):  
Phenolic Compounds ◽  
Phenolic Acids ◽  
Radical Scavenging Activity ◽  
Radical Scavenging ◽  
Sinapic Acid ◽  
Health Benefit ◽  
Leafy Vegetable ◽  
Scavenging Activity ◽  
Coumaric Acid ◽  
Phenolic Profiles

Abstract Background Red amaranth (Amaranthus gangeticus L.) has great diversity in Bangladesh, India, and South East Asia with multipurpose uses. The bright red-violet colored A. gangeticus is a popular and low-cost leafy vegetable in the Asian continent including Bangladesh and India because of attractive leaf color, taste, adequate nutraceuticals, phenolic compounds, and sole source of betalains. The natural colors and phenolic compounds of this species have a significant role in promoting the health-benefit including the scavenging capacity of radicals, the colorant of food products, and play a vital role in the industry of foods. However, phenolic profiles and radical scavenging activity of this species have not been evaluated. Hence, for the first time, four selected advance lines of A. gangeticus were characterized for phenolic profiles, antioxidant constituents, and antioxidant potentiality. Results A. gangeticus genotypes are abundant sources of phenolic profiles and antioxidant constituents with good radical quenching capacity that differed across the genotypes. Twenty-five phenolic acids and flavonoids, such as protocatechuic acid, salicylic acid, gentisic acid, gallic acid, β-resorcylic acid, vanillic acid, p-hydroxybenzoic acid, chlorogenic acid, ellagic acid, syringic acid, ferulic acid, kaempferol, m-coumaric acid, trans-cinnamic acid, quercetin, p-coumaric acid, apigenin, caffeic acid, rutin, sinapic acid, isoquercetin, naringenin, myricetin, catechin, and hyperoside were identified in A. gangeticus accessions. A. gangeticus accessions LS7 and LS9 demonstrated ample phenolic acids, flavonoids, antioxidant constituents, and antioxidant potentiality. It revealed from the correlation study that antioxidant components of A. gangeticus genotypes exhibited good radical scavenging activities. The genotypes LS7 and LS9 could be directly used as phenolic profiles, antioxidant constituents, and antioxidant activity enrich cultivars. Conclusions The identified compounds of phenolic acids and flavonoids in A. gangeticus privilege the comprehensive study of pharmacology. The basic information on phenolic profiles and antioxidant constituents achieved in the present study will provide the scientist’s forum for the scientific assessment of these compounds in A. gangeticus.

scholarly journals TOTAL FENOL DAN AKTIVITAS ANTIOKSIDAN BUBUK KULIT MANGGIS (Garcinia mangostana L.) DARI BUAH SEGAR DENGAN VARIASI LAMA PENYIMPANAN YANG DIOLAH SECARA MEKANIS

2017 ◽  
Vol 21 (2) ◽  
pp. 110 ◽  
Author(s):  
Irwan Roza ◽  
Evawati Evawati ◽  
Rince Alfia Fadri ◽  
Gusmalini Gusmalini
Keyword(s):  
Antioxidant Activity ◽  
Phenolic Compounds ◽  
Phenolic Content ◽  
Total Content ◽  
Free Radical Scavengers ◽  
Total Phenolic ◽  
Radical Scavengers ◽  
Garcinia Mangostana ◽  
Storage Duration ◽  
Grinding Machine

This study aims to determine the total content of phenolic compounds and antioxidant activity of mangosteen skin powder from fresh fruit with variations of storage duration which processed mechanically. Methods of research done by determining the total content of phenolic compounds using the method of DPPH free radical scavengers. The fresh mangosteen skin was dried with a drying oven, with a capacity of 0.12 kg/h and a drying rate of 2.79 kg. Furthermore, dry mangosteen skin was milled by grinding machine with 2870 rpm rotation and obtained rendemen mangosteen skin powder as much as 38.04% with water content 8.33%. Total content of phenolic mangosteen powder with variation of storage duration 0 days, 10 days, and 20 days ranged 81.17 mgGAE / g - 195.51 mgGAE /g. The range of IC 50 for the three treatment is 6.80 ppm - 26.47 ppm. The highest total phenolic content and antioxidant activity werw found at zero days of storage.

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