High Antioxidant Content Research Articles

Characteristics of cadmium accumulation and tolerance in apple plants grown in different soils.

Cadmium (Cd) is a nonessential element and highly toxic to apple tree. However, Cd accumulation, translocation and tolerance in apple trees planted in different soils remain unknown. To investigate soil Cd bioavailability, plant Cd accumulation, physiological changes as well as gene expression patterns in apple trees grown in five different soils, 'Hanfu' apple seedlings were planted in orchard soils collected from Maliangou village (ML), Desheng village (DS), Xishan village (XS), Kaoshantun village (KS) and Qianertaizi village (QT), and subjected to 500 μM CdCl2 for 70d. Results showed that soils of ML and XS had higher content of organic matter (OM), clay and silt, and cation exchange capacity (CEC) but lower sand content than the other soils, thereby reduced Cd bioavailability, which could be reflected by lower concentrations and proportions of acid-soluble Cd but higher concentrations and proportions of reducible and oxidizable Cd. The plants grown in soils of ML and XS had relatively lower Cd accumulation levels and bio-concentration factors than those grown in the other soils. Excess Cd reduced plant biomass, root architecture, and chlorophyll content in all plants but to relatively lesser degree in those grown in soils of ML and XS. The plants grown in soils of ML, XS and QT had comparatively lower reactive oxygen species (ROS) content, less membrane lipid peroxidation, and higher antioxidant content and enzyme activity than those grown in soils of DS and KS. Transcript levels of genes regulating Cd uptake, transport and detoxification such as HA11, VHA4, ZIP6, IRT1, NAS1, MT2, MHX, MTP1, ABCC1, HMA4 and PCR2 displayed significant differences in roots of plants grown in different soils. These results indicate that soil types affect Cd accumulation and tolerance in apple plants, and plants grown in soils with higher OM content, CEC, clay and silt content and lower sand content suffer less Cd toxicity.

SYSTEMATIC LITERATURE REVIEW: WILLINGNESS TO PAY FOR CONSUMERS TO ORGANIC RICE

Introduction: Organic rice is a food product that is cultivated organically, does not contain chemicals and pesticides, and has a high nutrient and antioxidant content. This study aims to 1) find out the method used to collect data about consumers' willingness to pay for organic rice, 2) find out the method used to measure the level of willingness to pay for organic rice, 3) find out the factors that influence consumers' willingness to pay for organic rice. Methods: The method used in this study is the SLR (Systematic Literature Review) method with PRISMA (Preferred Reporting Items for Systematic Review and Meta-Analysis). Results: The results showed that 1) the highest frequency in data collection techniques was carried out using questionnaires and interviews (460 respondents), 2) the highest frequency in data analysis was using the CVM (contingent valuation method), 3) the most frequent category of factors influencing WTP, namely price product. Conclusion and suggestion: The more research questions answered in published journals, the more data collection methods, methods of measuring WTP, and factors that influence WTP are often used in research.

Pengaruh Ukuran Serbuk Simplisia dan Waktu Maserasi terhadap Aktivitas Antioksidan Ekstrak Kulit Sirsak

Secondary metabolites are one of the active substances in natural materials that are known to contain high antioxidants and are very beneficial for health. In addition to mangosteen, there are also natural ingredients that actually have high antioxidant content, but many people do not know about it, one of which is soursop fruit. In addition to the fruit, the skin of soursop fruit may contain antioxidants that are quite high. The purpose of this study was to determine the effect of different maceration times and powder sizes on the antioxidant activity of secondary metabolite compounds produced from ethanol-aquades extract of soursop fruit peel (Annona muricata L.). This study was conducted quantitatively with a descriptive research design where researchers conducted laboratory research conducted in triplo. This research used particle size variation of 50 mesh, 100 mesh, and 200 mesh and maceration time variation of 24 hours, 30 hours, 36 hours. From this study it can be seen that the difference in powder size and maceration time affects the results of antioxidant activity obtained. The optimum particle variation is using 200 mesh size, which is obtained antioxidant activity of 95.2%. While the optimum maceration time is for 24 hours, the yield is 94%. From this study it can also be seen that the ethanol-aquades extract of soursop fruit peel contains secondary metabolite compounds of triterpenoids, saponins, polyphenols and tannins.

Cultivation of Pleurotus ostreatus on agricultural wastes and effects on nutritional composition of the fruiting body

ABSTRACT Little interest has been shown in studies related to the effects of cultivating Pleurotus ostreatus on agricultural wastes and their impacts on nutritional value and biological efficiency of the fruiting body. Oil palm fiber, rice husk, sawdust from hardwood, guinea grass, bean pods and rice straw were collected in dried form and used as substrates. Active mycelium of P. ostreatus was used in preparation of spawn, and growth was observed after 30 days following inoculation and fruiting bodies were harvested for analysis. The proximate composition of crude protein, crude fat, crude fiber, ash, moisture, dry matter and carbohydrate composition; antioxidant properties from flavonoids, phenol, lycopene, beta carotene, and ascorbic acid and composition of Na, K, Ca, Mg, Cu, Mn and Zn varied across substrates. All cultivated P. ostreatus on substrates contained high amounts of crude protein, crude fat, crude fiber, ash, moisture, dry matter and carbohydrate, flavonoid, phenol, lycopene, beta carotene, and ascorbic acid, and mineral ions such as Na, K, P, N and Ca. Dry weight and biological efficiency were highest in P. ostreatus cultivated on rice straw, followed by bean pods. Pleurotus ostreatus grown on substrates used contained high amounts of nutrients. Rice straw and bean pods may be used to achieve high nutritional composition and antioxidant contents in P. ostreatus mushrooms.

Effect of Vinegar on the Oxidative Stability of Mayonnaise During its Storage.

Mayonnaise is an emulsion of oil that is susceptible to lipid oxidation, which can cause spoilage and the formation of harmful compounds. This study aims to evaluate the impact of Syrian apple and grape vinegar on the oxidative stability of mayonnaise and compare the use of natural antioxidants to synthetic ones such as butylated hydroxyanisole and butylated hydroxytoluene. The study measured total phenol content, radical scavenging activity, and identified some phenolic compounds by High Performance Liquid Chromatography (HPLC). The rancidity of mayonnaise was examined using peroxide value and thiobarbituric acid number. The fatty acids content in the mayonnaise samples was examined using gas chromatography. Vinegar samples containing high concentrations of phenolic antioxidants showed high ability to scavenge free radicals. The antioxidants in vinegar protected the mayonnaise samples from primary and secondary oxidation, and there was no statistically significant difference between the ratio of unsaturated fatty acids in the samples containing vinegar at the beginning and at the end of the storage period. The study shows the significance of using vinegar to protect mayonnaise from deterioration and increase its shelf life, in addition to its role as a dressing.

Recovery of Bioactive Compounds from Calabrian Bergamot Citrus Waste: Selection of Best Green Extraction

The purpose of this study was to select the best green extraction technique to recover the bioactive compounds in Calabrian Bergamot waste (Pomace). Different experimental variables such as solvent, time, and temperature were tested and the main physicochemical characteristics and antioxidant activity and constituents, such as total flavonoids, individual flavonoids, and limonoids (UHPLC-DAD) were analyzed. Later, the best extraction methodology was applied to characterize the individual portions that compose the bergamot pomace (albedo/pulp, seeds, and juice) of three different Calabrian cultivars: Fantastico, Femminello, and Castagnaro. Results of this study evidence that bergamot waste possesses a high antioxidant content that can be potentially used for further applications in the food industry.

Identification of the kombucha consumer profile in Fortaleza-CE

Made from the fermentation of sweetened tea from the Camellia sinensis herb by a symbiotic culture of bacteria and yeasts, Kombucha has been gaining ground in the Brazilian and international scene for its benefits and its possible ability to assist in human well-being. This fermented beverage has shown significant growth in the beverage market and, because of this, the present work aimed to carry out a data survey on the set of behavioral characteristics of kombucha consumers in the city of Fortaleza-CE and metropolitan region and the relationship of these individuals with the drink; as well as identifying the attributes that influence the purchase decision and prospecting the population's acceptability for fermented beverages such as kombucha. To carry out the research, the Google forms platform was used, and these forms were distributed through social networks following the snowball technique. XLSTAT software, Maxdiff test and Excel were used for data analysis. Thus, it was found that most kombucha consumers are women, young people, with an income between 1 and 4 minimum salary, single, with higher education and residents of the noblest areas of the city. The attributes that were considered decisive for the purchase decision were: health benefits, probiotic, flavor, increase immunity, contain no chemical additives and high antioxidant content. In this way, it is expected that this study will contribute with a direction to kombucha producers for the elaboration of new products directed to a specific public.

The Effect of Dayak Onion Extract on Lactic Acid Levels in Mice with FST Model

Intense physical exercise can increase lactic acid levels in the blood as a result of the anaerobic metabolism that occurs at that time. The impact of increased levels of lactic acid includes the occurrence of acidosis, damage to body cells, and fatigue which reduces muscle performance. Antioxidants can play a role in preventing body fatigue caused by oxidative stress. Onion Dayak (Eleutherine palmifolia) is a type of medicinal plant that is useful for health. The high content of antioxidants in Dayak onions can be used as an alternative anti-fatigue ingredient. This study aimed to look at the effect of the dose and duration of Dayak onion extract on lactic acid levels and physical activity in mice forced swimming test models. Type of Research Randomized Pre and Post-Test Control Group Design. Male White Mice (Sprague Dawley) 2 months old (weight 150-200g). Divided into 5 groups K- (the experimental group was not given Dayak onion extract, they were still given FST), K+ (the experimental group was given xanthine and FST), P1 (given Dayak onion extract at a dose of 50mg/200gBW), P2 (given the extract onion Dayak dose of 100mg/200gBB), P3 (given onion extract dose of 200mg/200gBW). Dayak onion extract was given for 28 days and given the forced swimming test, then the changes in lactic acid and physical activity endurance in swimming were observed.

Anthocyanins and Total Phenolic Compounds from Pigment Extractions of Non-Native Species from the Umia River Basin: Eucalyptus globulus, Tradescantia fluminensis, and Arundo donax

Alien invasive species (AIS) and non-native species are a prominent and extended problem in a wide range of areas in Europe and around the world. Centered in the Umia’s riparian forest, in Galicia, we found at least three main AIS needing to be controlled and harvested to preserve the biodiversity of the area. Previous studies probed that leaves and bark of selected species—Tradescantia fluminensis, Arundo donax, and Eucalyptus globulus—have important antioxidant properties, suitable for use in pharmaceutical and industrial contexts. A comparison of four solid-liquid extraction methods—Soxhlet extraction, ultrasound assisted extraction, thermal agitator, and infusion—was conducted in order to define the most efficient method in correlation within antioxidant (anthocyanins and total phenols) extraction. Water was selected as solvent, providing a sustainable research background without implying any chemical additives. The best extraction yields were obtained with Soxhlet extraction for all raw matter, with best results for Tradescantia fluminensis (41.89%) and Eucalyptus globulus leaves (39.35%); followed by the ultrasonic assisted extraction method, with better yield performed with Eucalyptus leaves (27.07%). On the contrary, Tradescantia fluminensis showed better efficiency with thermal agitator (35.07% compared to 23.19% from ultrasound extraction). After extractions, identification and quantification of total phenolic compounds and anthocyanins were carried out using spectrophotometric determination and acid hydrolysis in butanol method. In general, the best extraction yield in correlation with higher antioxidant content was performed by thermal agitator method, and Eucalyptus globulus leaves were demonstrated to be the better anthocyanins (6.18 ± 0.82 mg CC/g) and total phenols containers (172.40 ± 44.53 mg GAE/g). Studies provided promising possibilities for the residues of the three non-native species analyzed, as a source of antioxidants, favoring circular economy systems, as well as taking care of biodiversity in affected environments.

The Effect of Economic Factors on Coffee Consumption in Rukungiri District, South-Western Uganda

Rukungiri District production and marketing department has pursued campaigns to educate the public about the health benefits of coffee, including its high antioxidant content, potential to prevent certain malignancies, and potential to lower type 2 diabetes risk. Despite these efforts, the District still has a low level of coffee consumption. This study tried to determine whether economic variables could be responsible for the low consumption. Through the use of both quantitative and qualitative methods and a cross-sectional survey research design, this study was able to quickly assess the relationship between the study variables. Simple random and purposeful sampling methods were used to choose a sample of 123 respondents. The thematic analysis method was utilized to assess the qualitative data, while SPSS Version 23.0 was used to analyze the quantitative data. Based on the study's aims, quantitative data were presented in tables as descriptive statistics, correlations, and regressions. The study discovered a substantial positive association between economic parameters and coffee intake (r = 0. 876, P.01). Coffee consumption is influenced by the economic status in terms of higher incomes, wages, and general standards of living because these factors have a tendency to affect people's consumption habits. The study also came to the conclusion that raising the economic standing of residents of the Rukungiri District is what will drive up coffee consumption.

Effects of intermittent fasting on brain tissue in male Fisher-344 rats

Introduction: Intermittent fasting (IF), time-restricted food intake without any caloric restrictions, has been shown to improve cognition in animal models. Several pathways have been identified in IF-induced neuroprotection; here, we observed the effect of IF on neuroprotection targeting molecular markers of protein synthesis (mTOR), autophagy (ATG5/ LC3A), and antioxidant expression (SOD2). We hypothesized that IF would improve autophagy and antioxidant expression and reduce protein synthesis in male fisher-344 rats. Methods: Twenty-four, 10-week-old male Fisher-344 rats were randomly assigned into two groups (ad-libitum, or IF) and housed 4 per cage, on a 12:12 light: dark cycle. Ad-libitum group had 24/7 access to food and water while the IF group had 24/7 access to water and full access to food on an every-other-day basis (i.e. alternate day fasting) for ten weeks. At 20 weeks of age, animals were euthanized and brain tissues (hippocampus and cortex) were sectioned and snap-frozen in liquid nitrogen. Following homogenization, western blots were completed via Jess Protein Simple automated western blotting (Bio-Techne, Minneapolis, MN). Specific proteins of interested included, LC3 (Novas, NB100-2331), ATG5 (Novas, NB110-538185S), mTOR (Santa Cruz, sc-517464) and SOD2 (Abcam, ab68155). Compass software generated area under the curve values were used to determine protein expression. Group differences were analyzed with a two-tailed T-test per Prism Graph Pad software. Results: In cortex tissue, a significantly lower mTOR expression was observed in the IF group compared to the AL group (p<.001), however, mTOR expression was not significantly different in the hippocampus. Antioxidant enzyme, SOD2, was significantly higher in IF cortex tissues (p<.05) compared to AL controls. In contrast, SOD2 was significantly lower in IF hippocampal tissues (p<.01) compared to controls. No significant effect was documented in the LC3 and ATG5 autophagy markers. Conclusion: In the present study, IF significantly impaired protein synthesis (via mTOR expression) in the cortex only. Previous work has also concluded the downregulation of mTOR with both calorie restriction and fasting. However, the fact that no decline was present in the hippocampus is intriguing and will be the focus of follow-up investigations. As expected, IF increased antioxidant enzyme (SOD2) expression in the cortex and interestedly, IF decreased antioxidant expression in the hippocampus. While the hippocampus is noted for its high antioxidant content, this decreased expression induced with IF warrants more research. P20GM113109 This is the full abstract presented at the American Physiology Summit 2023 meeting and is only available in HTML format. There are no additional versions or additional content available for this abstract. Physiology was not involved in the peer review process.

Analysis of Corrosion in Production Tubing Using Monoethylene Glycol and Red Ginger as Inhibitors

The production system for industrial oil and gas is susceptible to corrosion, which must be controlled in order to sustain production and well direct as the production of tubing is the initial point of contact with the corrosion fluid and material agent. A chemical reaction between corrosive materials and fluids results in corrosion. Due to its mechanical characteristics, stainless steel has a wide range of uses in the building, chemical, and structural sectors. To combat corrosion issues, several chemical inhibitors are used, and numerous studies are actively working to develop organic inhibitors. Rhizome ginger is an organic component that has a high phenol antioxidant content and antioxidant compound, making it useful for corrosion issues. In this study, the effect of monoethylene glycol and ginger extract inhibitors on corrosion was reviewed. The corrosion rate was computed using an olga simulator, and the influence of the inhibitor on the rate of corrosion and the effectiveness of the inhibitors was examined.

SALAK ORGANIK WONOSALAM: PRODUK INOVASI TEH DARI LIMBAH KULIT SALAK UNTUK UMKM DESA WONOSALAM KABUPATEN JOMBANG

Snakefruit rind which has been treated as waste has not been optimally processed, in fact it is only used as waste by the community, even though snakefruit peel can be reprocessed into herbal tea for snakefruit peel. Snakefruit skin has a high content of antioxidants and polyphenols. This service activity aims to introduce new innovative products from processed zalacca peels, namely herbal teas at Micro, Small and Medium Enterprises in Wonosalam Village, Jombang Regency. The main process for making tea from bark is drying at a temperature of 60 0C and drying time for 7 hours. This service activity was carried out in August 2022 at the Wonosalam Village community activity workshop and the introduction process was carried out at Micro, Small and Medium Enterprises for soft drink products in Sumber Hamlet, Wonosalam Village. The parameter used to differentiate the quality of herbal teas is the respondent's satisfaction index on the color, taste and aroma of herbal tea. Where the highest satisfaction is in bark tea with Screwpine aroma, which is as much as 75% of the total respondents.

The Biochemistry and Effectiveness of Antioxidants in Food, Fruits, and Marine Algae.

It is more effective to maintain good health than to regain it after losing it. This work focuses on the biochemical defense mechanisms against free radicals and their role in building and maintaining antioxidant shields, aiming to show how to balance, as much as possible, the situations in which we are exposed to free radicals. To achieve this aim, foods, fruits, and marine algae with a high antioxidant content should constitute the basis of nutritional elements, since natural products are known to have significantly greater assimilation efficiency. This review also gives the perspective in which the use of antioxidants can extend the life of food products, by protecting them from damage caused by oxidation as well as their use as food additives.

Hot Water Extraction of Antioxidants from Tea Leaves—Optimization of Brewing Conditions for Preparing Antioxidant-Rich Tea Drinks

There are billions of tea drinkers around the world. However, the optimized tea-brewing temperature and time conditions for achieving a higher concentration of antioxidants in tea drinks have not been thoroughly studied. Finding out the optimized brewing conditions can benefit tea drinkers significantly. In this work, we have studied ten antioxidants from seven different popular green, Oolong, black, and scented teas using hot water extraction followed by HPLC analysis. The antioxidant yield was evaluated at 25-100 °C with 5 to 720 min of brewing time. Our results show that the extraction efficiency was enhanced by increasing the water temperature and the highest yield of antioxidants was achieved at 100 °C. The antioxidant yield increased with prolonged brewing time. However, the degradation of antioxidants occurred when tea leaves were extracted for 120 to 720 min. Caffeine was found in all seven tea samples. At 100 °C, the caffein concentration in the tea extract ranged from 7.04 to 20.4 mg/g in Rizhao green tea. Longjing green tea contained the highest concentration of antioxidants (88 mg/g) in the 100 °C extract. Epigallocatechin and caffeine were the most abundant compounds found in all tea samples studied, ranging from 4.77 to 26.88 mg/g. The antioxidant yield was enhanced by increasing the extraction time to up to 60-120 min for all ten compounds studied.

Pretreatment with Ajwa dates (Phoenix dactylifera Linn) prevents development of alloxan-induced diabetes in rats

<p><strong>ABSTRACT</strong></p>
 <p><strong>Background and Objective</strong>: A global increase in the prevalence of diabetes mellitus (DM) is associated with increased morbidity and mortality. Oxidative stress is a fundamental component in the pathogenesis of DM Ajwa dates are known to have a high antioxidant content, especially in their seeds. Hence this study was designed to determine the preventive effects of Ajwa date fruit on alloxan-induced diabetes in an experimental rat model.</p>
 <p><strong>Methods:</strong> This experimental study was conducted at the Post Graduate Medical Institute, Lahore, Pakistan. A total of forty Sprague-Dawley rats were divided into five groups with eight animals in each. Rats in group A were normal control, whereas rats in group B were induced with intraperitoneal alloxan (160 mg/kg body weight) to develop diabetes. Groups C, D, and E rats were fed on a diet supplemented with Ajwa flesh, seed, and whole Ajwa respectively for 1 week. Blood and urine glucose levels were measured on days 0, 7 (pre-alloxan) and 11, 14, 19 (post-alloxan). Serum insulin, homeostatic model assessment (HOMA) for β-cell function (HOMA-β), and insulin resistance (HOMA[1]IR) were estimated terminally.</p>
 <p><strong>Results: </strong>Diabetes was induced successfully in animals of all experimental groups except the normal control group. Rats of the Ajwa-seed group (D) showed relative resistance to diabetes induction with three non-diabetic rats on day 19. In group E, rats had lower blood sugar levels than rats in group C (p = 0.010). Serum insulin, HOMA-β and HOMA-IR, revealed partial beta cells restoration in the experimental animals of groups D and C. Insulin resistance was significantly higher, despite the highest insulin level (3.77 µIU/ml; p value <0.001) in group C.</p>
 <p><strong>Conclusion:</strong> Ajwa date seed powder appears to provide relative protection against the development of diabetes in rats induced by alloxan.</p>

Biosynthesis of gold nanoparticles using papaya seed extract for the functionalization of nanocellulose membranes

Papaya seeds are a byproduct with virtually no commercial purposes nowadays, although they are a promising renewable source of many types of chemical compounds, with high contents of antioxidants. These chemicals have the potential to act as reducing agents in the synthesis of metallic nanoparticles as well as having antibacterial and antioxidant activities. Biosynthesized nanoparticles can be used to improve the commercial use of papaya seeds, mostly by doping nanocellulose membranes with these nanoparticles, allowing the production of sustainable and biocompatible nanocomposites with noteworthy properties. Here, we report the preparation of papaya seed extract in ethanol to use as a reducing agent in the biosynthesis of gold nanoparticles (AuNPs) since natural extracts are considered a greener, low-cost, and efficient approach. For comparison, AuNPs synthesize with sodium citrate as a reducing agent were utilized as a positive control. Further, the biosynthesized AuNPs were impregnated in nanofibrillated cellulose (NFC) membranes at concentrations of 0.5%, 1%, and 2% based on a strategy of biomass valorization. Papaya seeds had a 30% yield in ethanol, and a diverse composition of antioxidant chemicals, such as flavonoids and phytosterols. The AuNPs biosynthesized with papaya seed extract showed a surface plasmon resonance band at 545 nm. Due to the variable content of the ethanolic seed extract, the biosynthesized AuNPs had different morphology than the reference, showing distinct shapes and sizes ranging from 15 to 60 nm. In terms of shelf life, both reference and biosynthesized AuNPs presented better stability at low-temperature storage. Doping of NFC membranes revealed that the biosynthesized AuNPs would have a higher nanoparticle concentration in the biosynthesis and stronger adhesion to the NFC than the reference nanoparticles, especially for a 2.0% doping concentration. Also, they presented a homogeneous distribution across the cellulose nanofibrils with several sites impregnated with AuNPs. The results highlight a potentially simple and green route using Brazilian papaya seeds to synthesize AuNPs and impregnate NFC membranes for noteworthy applications based on the bioeconomy and biorefinery concepts.

Extraction of bioactive compounds from Peruvian purple corn cob by high isostatic pressure

The purple corn cob is an agro-industrial by-product that contains high-value bioactive compounds, which makes its use attractive for the development of extraction processes. The aim of this research was to extract the bioactive compounds from the purple corn cob by high isostatic pressure at different processing temperatures. Pressures of 0.01 MPa, 250 MPa, 450 MPa and 650 MPa for 3 minutes and at temperatures of 25 °C, 45 °C and 65 °C were used. High pressure extraction was compared with conventional extraction (2.5 h at 25°C). The purple corn cob extract obtained by isostatic processing at 650 MPa and 65 °C presented high antioxidant activity and content of bioactive compounds, unlike the conventional extraction of 2.5 h and 65 °C (p < 0.05). However, it did not show a significant difference with the extract obtained at 450 MPa and 45 °C (p > 0.05). Seven different anthocyanins were identified by liquid chromatography in the extracts obtained by high isostatic pressure (650 MPa at 65 °C) and hydroalcoholic maceration (2.5 h at 65 °C), mainly cyanidin-3-glucoside, pelargonidin-3-glucoside and peonidin-3-glucoside, and their respective malonyl derivatives. The high isostatic pressure increased the extraction of bioactive compounds by more than 50% and obtained them in shorter times, thus appearing as a new alternative, and eco-friendly method for the extraction of bioactive compounds from plant tissues.

Potential of Agricultural Residues from Musa acuminata (Cavendish) Peel: Study on Physicochemical Properties and Thin-Layer Drying Characteristic

Musa acuminata (Cavendish) peel is a waste product of limited values that is generated in large quantities and caused detrimental environmental issues in long term if there are no alternative solutions. This primary residue corresponds to 40 % of the fruit weight with a broad natural antioxidant such as polyphenols that will be valuable to the food industry application. This study aimed to investigate the physicochemical characteristics and solvent extraction for high polyphenols recovery between unripe and ripe peel following the drying characteristic and quantification analysis. The physicochemical characteristics of Cavendish peel showed significant differences at different ripening stages, thus effect the solvent extraction towards antioxidant compounds and activities. An aqueous extract of unripe peel was the best solvent for higher phenolic, tannin and flavonoid content compared to ripe peel. The 40 °C of drying treatment will preserve higher tannin content than other temperature and eleven profile of polyphenols had been detected using HPLC including tannic acid as a lead compound. The results from this study can be used for further isolation and purification of tannin to the possible application as functional food ingredients due to its antioxidants benefits and conversion of this residues as valuable is necessary. HIGHLIGHTS The unripe Cavendish peel contain higher antioxidant content and activities compare to the ripe peel Aqueous extraction showed the highest total tannin content recovery compared to other solvents The drying condition at 40 °C give the best recovery of tannin content from the Cavendish peel Tannic acid as a lead compound detected by the HPLC analysis GRAPHICAL ABSTRACT

A review of antioxidant potential from seaweeds - extraction, characterization, benefits and applications

Potential natural antioxidant from seaweeds is used to improve the oxidative stability of food. It also functions as an active ingredient. There are three classes of antioxidants consisting of vitamins, carotenoids and polyphenols. Researchers employ a variety of ways to evaluate antioxidant activity, including screening approaches and chemical composition. Solid-liquid extraction pressured liquid extraction, supercritical fluid extraction, and other green extraction techniques are among the seaweed antioxidant extraction methods commonly utilized and reviewed in this article. The aim of the review was to identify the potential source of high antioxidant content and polysaccharides, along with the best extraction method. This overview summarised the composition of seaweed antioxidants, extraction methods and the advantages of antioxidants found in seaweed.