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Khaya senegalensis A. Juss (Meliaceae) is a popular medicinal plant, widely used in the management of various ailments in the African traditional medicine. This study attempts to investigate into the different extraction methods (homogenizer-assisted extraction (HAE), maceration (MAC), infusion and Soxhlet (SE) extraction) on the pharmacological properties and chemical profiles of K. senegalensis. Antioxidant properties and inhibitory potential against key enzymes were assessed and bioinformatics analysis was conducted on selected limonoids to predict putative pharmacokinetics and protein targets underlying the pharmacological effects. Overall, the leaf extracts showed notable flavonoid (20.59-104.43 mg RE/g) content and the stem barks extracts displayed the highest total phenolic (87.69-46.28 mg GAE/g), phenolic acid (62.96-107.22 mg CE/g), flavanol (3.60-135.40 mg CAE/g) contents. All extracts showed remarkable antioxidant activities, with the MAC-Water leaf extract being most active in all the assays. Regarding stem bark, the MAC-MeOH extract exerted the highest free radical scavenging abilities, while HAE and MAC extracts were better sources of reducing agent and metal chelators. The HAE-MeOH, MAC-Water, and SE extracts showed noteworthy inhibitory activity against AChE, BChE (only stem barks), tyrosinase and α-glucosidase (only stem barks). All extracts displayed moderate inhibitory activities against α-amylase. The bioinformatics approach showed that khayanoside A and C interacted with multiple isoforms of metalloproteinase, while humilin B and khayanone interacted with opioid receptors. To sum up, the chemical profiles and biological activities of K. senegalensis were closely dependent on the extraction methods. Results amassed from this study showed that K. senegalensis is a potent source of bioactive compounds which could be explored as a functional food.The present study was conducted to identify flavor-related chemical compounds and to elucidate beef flavor development in response to dry-aging. Paired grass-fed beef loins (n = 18) were obtained at 7 d postmortem, cut into two sections and assigned to 3 aging methods conventional dry-aging (DA), vacuum packaged wet-aging (WA) and dry-aging in a bag (DW) for 28 days. Following aging, samples were analyzed for UPLC-MS metabolomics, volatile, fatty acid profiling, and consumer sensory comment analysis. Greater number of proteins and nucleotides derived metabolites were liberated in dry-aged samples compared to WA (P 0.05), higher concentrations of volatile compounds were found in the dry-aged (P less then 0.05). Dry-aging process decreased the presence of terpenoid and steroid lipid group, which could possibly result in reducing undesirable flavor of grass-fed beef.Hepatocellular carcinoma (HCC) arising from fibrosis/cirrhosis is the most common type of primary liver cancer. Conversely, a higher intake of fruits and vegetables might play a protective role in HCC risk. Recently, Myrtaceae family tropical fruits have raised great interest due to the high levels of anthocyanins especially in their peels, which are usually discarded upon consumption. Anthocyanins are antioxidant pigments known to have beneficial effects in vivo/in vitro cancer bioassays. Thus, we evaluated whether dietary Myrciaria jaboticaba, Syzygium cumini, and Syzygium malaccense fruit peel powders reduce fibrosis and hepatocarcinogenesis in mice. OTSSP167 chemical structure Female C3H/HeJ mice were submitted to the model of diethylnitrosamine/carbon tetrachloride-induced liver fibrosis and carcinogenesis. Concomitantly, mice received a basal diet containing 2% of M. jaboticaba, S. cumini, or S. malaccense fruit peel powders, obtained by convective drying, for 10 weeks. M. jaboticaba peel powder showed the highest levels of total t differential biological responses may be attributed to distinct anthocyanin profiles and levels, assigning a functional/market value to the underutilized peel fraction.Gut microbiota bioconversion of polyphenols in predigested mango 'Ataulfo' peel was studied using a validated, dynamic in vitro human colon model (TIM-2) with faecal microbial inoculum. Dried peels were predigested with enzymatic treatment, followed by TIM-2 fermentation (72 h). Samples were taken at 0, 24, 48 and 72 h and analyzed by HPLC-QToF. Derivatives of hydroxyphenylpropionic, hydroxyphenylacetic and hydroxybenzoic acids, as well as, pyrogallol were the main polyphenols identified. These metabolites might derivate from flavonoid (flavanols and flavonols), gallate and gallotannin biotransformation. Despite the high content of ellagic acid in mango peel, low amounts were detected in TIM-2 samples due to transformation into urolythins A and C, mainly. Xanthone and benzophenone derivatives, specific to mango, remained after the colonic biotransformation, contrary to flavonoids, which completely disappeared. In conclusion, microbial-derived metabolites, such as xanthone and benzophenone derivatives, among others, are partially stable after colonic fermentation, and thus have the potential to contribute to mango peel bioactivity.Food-borne infections cause a considerable amount of illnesses, heavily affecting healthcare systems. Given the spread of food-borne infections, assessing food risks is a relevant issue for the food industry and policymakers. Following a systematic and meta-analytical approach, we evaluate how different sources and types of risks (i.e. objective and subjective) are valued by consumers, in order to emphasise to what extent information on food risks may be efficiently transferred to consumers. The results show that information on food safety, conveyed through labels, exerts a positive influence on the premium prices for food safety. Consumers would be willing to pay a price premium up to 168.7% for food products that are treated against a specific food-borne risk factor, certified to be safe, tested or even inspected by public or third parties. However, we also find that labels are inefficient instruments of information on food safety, particularly when products are likely to be affected by hazardous and risky events and consumers correctly perceive risks. The results suggest that consumers exposed to relevant risk information about food safety tend to increase their risk perception and to decrease their premium prices for information on food safety. Including labels on food safety may fill the information gap and thus lower the mismatch between (objective) scientific-based risks and (subjective) perceived risks.
Read More: https://www.selleckchem.com/products/otssp167.html
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