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Roselle (Hibiscus sabdariffa L.) is a widely consumed edible flower, often utilized as a natural coloring agent. The bright red color of roselle is due to its anthocyanin content. Beyond their role as colorants, anthocyanins are known for their potent antioxidant properties, which have drawn significant interest for their potential health benefits. To fully harness the advantages of roselle's anthocyanins, developing a reliable extraction method is crucial. This study aimed to establish a fast, efficient, and environmentally friendly extraction technique using microwave-assisted extraction (MAE). Key factors, such as temperature (30, 65, and 100 °C), solvent concentration (30 %, 50 %, and 70 % ethanol in water), and solvent-to-solid ratio (10:1, 25:1, 40:1), were optimized using the Box-Behnken design combined with response surface methodology. The extraction time (5–30 min) was also evaluated to maximize anthocyanin recovery. Two major anthocyanins, delphinidin-3-sambubioside and cyanidin-3-sambubioside, were identified using UHPLC-PDA-QToF-MS and quantified using a cyanidin-3-glucoside calibration curve. The optimal extraction conditions were found to be 72 °C, using 70 % ethanol in water with a 40:1 solvent-to-solid ratio for 15 min. This method was validated with high accuracy (>98 % recovery) and precision (CV

The primary challenge encountered by marketers of green chili peppers is the rapid post-harvest deterioration. The application of pre- and post-harvest moringa leaf extract (MLE) is an effective approach to preserving the quality of fruits after being harvested. This study aimed to assess the effect of MLE application at pre- and post-harvest periods on physical and chemical properties of green chili during storage. For this purpose, a completely randomized design was arranged with nine replications. Pre-harvest MLE (seed soaking + foliar spraying with MLE) treatment showed a similar response to the control. Meanwhile, post-harvest MLE application on fruit by dipping method had better results on L*, a*, weight loss, firmness, and vitamin C after 7 d of storage compared to the control. These results suggested that post-harvest MLE application was more effective in prolonging the self-life of green chili, particularly in maintaining the physical attributes.

Matcha gained popularity due to its health benefit as the awareness of the consumers' well-being increased. The product contains antioxidants, mainly catechin, and a unique taste. Matcha is commonly produced from Camelia sinensis var sinensis, whereas in other Asian regions with shading practices, C. sinensis var assamica is primarily cultivated. Both varieties have different flavors of teas due to genetic differences and cultivation techniques. In tea cultivation, shading is one of the important practices to increase the quality of matcha. Therefore this study aimed to investigate the effect of cultivation technique, namely shading intensity (0%, 50%, 70%, 90%) on C. sinensis var assamica on the physical, chemical, and sensory profile of matcha produced. This study exhibited that the resultant matcha cultivated with the higher intensity of shading tends to have a darker color in terms of lightness (from 61.43 to 53.64), lower moisture content (from 9.26% to 8.64%), and solubility index (from 17.10% to 15.37%) in 0% and 90% shading respectively. At the same time, the protein content of the plant tends to fluctuate in several shading intensities. In corresponding to the decreasing phenolic (from 50.78 to 46.09 mgGAE/g) and flavonoid content (from 41.89 to 15.15 mgQE/g) of the matcha in higher shading (from 0% and 90% shading, respectively), the catechin and antioxidant activity (52.3 to 68.85 of IC50) also decreased in 0% and 90% shading intensity. Meanwhile, the sensory evaluation of the resultant matcha from the higher intensity (from 0% and 90% shading) exhibited higher acceptance (from 3.02 to 3.42 of overall acceptance in 7-scale hedonic response). Overall, it should be considered that as the shading intensity gets higher (from 0% to 90%), which might result in better consumer acceptance, the bioactive compounds, namely phenolics, flavonoids, and catechins, might have a lower amount in the shaded plants.

The protein hydrolysate that contains bioactive peptides of yellowfin tuna (Thunnus albacares) skin collagen with antioxidant activity has been successfully studied by using in silico and in vitro assays. We found that using the in silico assessment, the antioxidant peptides can be found from the precursor (type I α1 and α2 collagen of yellowfin tuna). Applying papain as a protease will also provide the greatest degree of hydrolysis for antioxidative peptides. The highest peptide rank peptides sequence such as Pro-Trp-Gly (PWG), Pro-His-Gly (PHG), His-Leu (HL), Ile-Arg (IR), Ala-His (AH), Glu-Leu (EL) that predicted using papain in silico. Molecular docking analysis showed all peptides derived from yellowfin tuna have hindered the substrate to access the active site of myeloperoxidase (MPO). Interestingly, the substitution of the amino acid from His (PHG, 7.1 kcal/mol) to Trp (PWG, 8.0 kcal/mol) has increased the affinity of the peptide towards MPO. They have antioxidative activities used in silico approach to MPO enzyme. We also confirm the in vitro assays for the protein hydrolysate after proteolysis using papain. The concentration and hydrolysis time will give influence the degree of hydrolysis, and antioxidant activities (P

Traceability has become an essential component of the fisheries supply chain. It ensures food safety, verifies product legitimacy, and addresses customer concerns about product origin and authenticity. In fisheries traceability refers to the ability to track the source and movement of fishery products throughout the supply chain. The purpose of this study is to find out how the development of traceability in the fisheries supply chain today. This study uses documents in the form of scientific articles obtained from 3 reference sources namely Scopus, PubMed and WebofScience. The total articles obtained were 2655 which were then screened from the title, abstract to the suitability of the documents obtained with the objectives of this study which resulted in 40 selected articles. The traceability system in the fisheries supply chain has been very developed and also uses the latest technology to guarantee the seafood obtained by consumers, but there are still many obstacles such as dishonest fisheries industry players that make the system not run well. The development of digital technology utilizing IoT, QR codes, and e-DNA is required to integrate monitoring technology so that marine products presented to consumers can be guaranteed.

Okara is a solid byproduct created during the processing of soy milk. The production of protein hydrolysates utilizing enzymatic tests such as papain can result in the production of bioactive peptides (BPs), which are amino acid sequences that can also be produced from the okara protein by hydrolysis. The objective of this study was to investigate the antioxidant activities of okara hydrolysates using papain, based on the in silico and in vitro assays using the papain enzyme. We found that using the in silico assessment, the antioxidant peptides can be found from the precursor (glycinin and conglycinin) in okara. When used as a protease, papain provides the maximum degree of hydrolysis for antioxidative peptides. The highest-peptide-rank peptide sequence was predicted using peptide ranks such as proline–histidine–phenylalanine (PHF), alanine–aspartic acid–phenylalanine (ADF), tyrosine–tyrosine–leucine (YYL), proline–histidine–histidine (PHH), isoleucine–arginine (IR), and serine–valine–leucine (SVL). Molecular docking studies revealed that all peptides generated from the parent protein impeded substrate access to the active site of xanthine oxidase (XO). They have antioxidative properties and are employed in the in silico approach to the XO enzyme. We also use papain to evaluate the antioxidant activity by using in vitro tests for protein hydrolysate following proteolysis. The antioxidant properties of okara protein hydrolysates have been shown in vitro, utilizing DPPH and FRAP experiments. This study suggests that okara hydrolysates generated by papain can be employed as natural antioxidants in food and for further applications, such as active ingredients for antioxidants in packaging.

In recent years, there has been an increased motivation to reduce meat consumption globally due to environmental and health concerns, which has driven the development of meat substitutes. Filamentous fungal biomass, commonly known as mycoprotein, is a potential meat substitute since it is nutritious and has filaments to mimic meat fibrils. The current study aimed to investigate the potential use of a cheap substrate derived from the food industry, i.e., residual water in a tempeh factory, for mycoprotein production. The type of residual water, nutrient supplementation, optimum conditions for biomass production, and characteristics of the mycoprotein were determined. The results showed that the residual water from the first boiling with yeast extract addition gave the highest mycoprotein content. The optimum growth condition was a pH of 4.5 and agitation of 125 rpm, and it resulted in 7.76 g/L biomass. The mycoprotein contains 19.44% (w/w) protein with a high crude fiber content of 8.51% (w/w) and a low fat content of 1.56% (w/w). In addition, the amino acid and fatty acid contents are dominated by glutamic acid and polyunsaturated fatty acids, which are associated with an umami taste and are considered healthier foods. The current work reveals that the residual boiling water from the tempeh factory can be used to produce high-quality mycoprotein.

Roselle (Hibiscus sabdariffa L.), as an edible flower, has long provided an array of positive effects on human health. This benefit is a result of phenolic compounds that are naturally present mainly in the calyx. Plentiful medicinal remedies and functional foods based on this flower are available worldwide, as supported by the studies of phenolic compounds in recent decades. This paper aims to provide a comprehensive review of the composition, biological activity, and beneficial effects on human health of phenolic compounds in roselle. This review was performed in accordance with the Preferred Reporting Items for Systematic reviews and Meta-Analyses (PRISMA) guidelines. A structured search in the published literature for phenolics compositions in roselle was required prior to the evaluation on the validity of the reported analytical methods. Reliable identification and quantification of phenolic compounds in roselle can be achieved by employing the proper extraction and separation methods. With ample alternative analytical methods discussed here, this review provided an aid for comprehending and selecting the most appropriate method for a particular study. The applications of the analytical methods highlighted indicated that phenolic acids, flavonoids, and their derivatives have been identified and quantified in roselle with a range of biological activities and beneficial effects on human health. It was also disclosed that the composition and concentration of phenolic compounds in roselle vary due to the growth factors, cultivars, and environmental influence. Finally, apart from the research progress carried out with roselle during the last ten years, this review also proposed relevant future works.

Okara is a solid byproduct created during the processing of soy milk. The production of protein hydrolysates utilizing enzymatic tests such as papain can result in the production of bioactive peptides (BPs), which are amino acid sequences that can also be produced from the okara protein by hydrolysis. The objective of this study was to investigate the antioxidant activities of okara hydrolysates using papain, based on the in silico and in vitro assays using the papain enzyme. We found that using the in silico assessment, the antioxidant peptides can be found from the precursor (glycinin and conglycinin) in okara. When used as a protease, papain provides the maximum degree of hydrolysis for antioxidative peptides. The highest-peptide-rank peptide sequence was predicted using peptide ranks such as proline–histidine–phenylalanine (PHF), alanine–aspartic acid–phenylalanine (ADF), tyrosine–tyrosine–leucine (YYL), proline–histidine–histidine (PHH), isoleucine–arginine (IR), and serine–valine–leucine (SVL). Molecular docking studies revealed that all peptides generated from the parent protein impeded substrate access to the active site of xanthine oxidase (XO). They have antioxidative properties and are employed in the in silico approach to the XO enzyme. We also use papain to evaluate the antioxidant activity by using in vitro tests for protein hydrolysate following proteolysis. The antioxidant properties of okara protein hydrolysates have been shown in vitro, utilizing DPPH and FRAP experiments. This study suggests that okara hydrolysates generated by papain can be employed as natural antioxidants in food and for further applications, such as active ingredients for antioxidants in packaging. [ABSTRACT FROM AUTHOR]

In recent years, there has been an increased motivation to reduce meat consumption globally due to environmental and health concerns, which has driven the development of meat substitutes. Filamentous fungal biomass, commonly known as mycoprotein, is a potential meat substitute since it is nutritious and has filaments to mimic meat fibrils. The current study aimed to investigate the potential use of a cheap substrate derived from the food industry, i.e., residual water in a tempeh factory, for mycoprotein production. The type of residual water, nutrient supplementation, optimum conditions for biomass production, and characteristics of the mycoprotein were determined. The results showed that the residual water from the first boiling with yeast extract addition gave the highest mycoprotein content. The optimum growth condition was a pH of 4.5 and agitation of 125 rpm, and it resulted in 7.76 g/L biomass. The mycoprotein contains 19.44% (w/w) protein with a high crude fiber content of 8.51% (w/w) and a low fat content of 1.56% (w/w). In addition, the amino acid and fatty acid contents are dominated by glutamic acid and polyunsaturated fatty acids, which are associated with an umami taste and are considered healthier foods. The current work reveals that the residual boiling water from the tempeh factory can be used to produce high-quality mycoprotein. [ABSTRACT FROM AUTHOR]

Macroalgae are an essential basic ingredient for many industries from which numerous derived products with great economic value are manufactured. Each macroalga has a unique composition that might provide specific physical and chemical information that can be used as markers for authentication. Their compositions may differ depending on different factors, including geographical regions. Unsupervised exploratory techniques, namely principal component analysis (PCA) and hierarchical cluster analysis (HCA), and nonparametric supervised methods including support vector machines (SVMs) and random forests (RFs), were applied to the Vis-NIR spectroscopic data to standardize the quality of macroalgae based on three regional zones in Indonesia (Western, Central, Eastern). A total of 35 macroalgae samples from six islands in Indonesia were analyzed. The PCA and HCA results present a tendency for the samples to be distributed and clustered according to the type of their species. Meanwhile, the SVM successfully classified samples based on their regional zones, and when combined with five-fold cross-validation, acquired an accuracy of 82%. The RF model algorithm obtained an accuracy of 100%, 80%, and 82% for the training, test, and five-fold cross-validation, respectively. [ABSTRACT FROM AUTHOR]

The purpose of this research was to determine the effect of composite fish gelatin–chitosan edible coatings enriched with black tea extract on the physical, chemical, and fungal decay properties of minimally processed watermelons stored at ±4 °C for 13 days. In this study, tuna skin gelatin was extracted and used to prepare edible coating solutions which comprised 4% gelatin, 2% chitosan, 2% calcium lactate, 2% glycerol, and black tea extract (0%; 0.25%; 0.50%; 0.75%; 1%). The samples were coated using the layer-by-layer dipping technique. This study showed that composite fish gelatin–chitosan edible coating enriched with black tea extract maintained and improved weight loss, texture (hardness), color, pH, and total soluble solid antioxidant activity and prevented fungal decay on minimally processed watermelons stored at ±4 °C for 13 days. The development in this study of edible film and a coating prepared from fish gelatin–chitosan and the incorporation of black tea extract as an antioxidant or antimicrobial agent can be a new approach to preventing postharvest loss and increasing the shelf life of minimally processed watermelon. [ABSTRACT FROM AUTHOR]

Physical properties, flavor characteristics and antioxidant properties of the red mature peppers of Shimatogarashi (Capsicum frutescens) were compared to Takanotsume peppers (Capsicum annuum) as the control. Compositions of organic acids and capsaicinoids differed between the peppers. Malic acid was the prevalent organic acid in Shimatogarashi, while citric acid was prevalent in Takanotsume. Shimatogarashi had higher capsaicin and dihydrocapsaicin contents compared to Takanotsume. In terms of volatile compound compositions, the prevalent compounds in Shimatogarashi and Takanotsume peppers were hexanal and 10.v,ll.-himachala-3(l2),4-diene, respectively. Overall, Shimatogarashi peppers were brightly colored, highly pungent with a fresh and fruity aroma, while Takanotsume peppers were dark red, moderately pungent with a warm and herbaceous aroma. As suggested by their total phenolic content and ORAC, Shimatogarashi peppers showed higher antioxidant activity compared to Takanotsume peppers. [ABSTRACT FROM AUTHOR]