Total Flavonoid Content Research Articles

Biochemical and Histological Improvements in Alloxan-Intoxicated Diabetic Rats via Administration of <i>Vitex agnus</i>-cactus Seed Extract

Natural resources constitute an exhaustible source of bioactive compounds well-known for their antidiabetic properties. This study investigated the antioxidant and antidiabetic activities of <i>Vitex agnus</i> citratus extract against alloxan-induced metabolic disorders in an animal model. The antioxidant ability of the extract was evaluated using three complementary assays (TAC, DPPH, and FRAP), and its total phenolic and flavonoid contents were determined calorimetrically. The in vivo experiment included five groups: group 1 received distilled water (10ml), group 2 received alloxan (150 mg/kg) and distilled water (10ml), group 3 received alloxan (150 mg/kg) and <i>V. agnus</i> cactus aqueous extract (200mg/kg bw), group 4 received alloxan (150 mg/kg) and VAC aqueous extract (300mg/kg bw), and group 5 received alloxan (150 mg/kg) and glibenclamide. The doses were administered once daily via gavage for four weeks. Blood glucose levels, hepatic enzymes, uric acid, urea, creatinine, and electrolytes were analyzed after four weeks of treatment. The antioxidant profile of VAC extract revealed considerable phenolic and flavonoid contents and an impressive antioxidant ability (37.6 ± 0 .73 mg EAA/g, 0.54±0.46 mg/mL, and 0.7±0.03 mg/mL for TAC, DPPH-IC<sub>50</sub>, and FRAP, respectively). Treatment of rats with <i>V. agnus</i> cactus extract significantly improved all changes induced by alloxan injection by controlling hyperglycemia, liver and kidney disorders, and serum electrolyte levels. Therefore, using <i>V. agnus</i> cactus would have pleiotropic effects in preventing metabolic disorders induced by alloxan.

Effect of the Storage Conditions on the Microbiological Quality and Selected Bioactive Compound Content in Fruit Mousses for Infants and Young Children

Fruit mousses, as low-processed products, are highly susceptible to external conditions, and storage leads to the degradation of bioactive compounds, particularly phenolic compounds and vitamins, as well as promoting the growth of yeasts and molds. This study investigated the impact of storage conditions on the microbiological quality and degradation of selected bioactive compounds in fruit mousses from various producers (from apples, pears, and multi-components). Total phenolic (TPC) and total flavonoid (TFC) contents, vitamin C level, antioxidant capacity (AC, measured by the DPPH assay), and concentrations of macro- and microminerals were evaluated in fresh mousses and those stored for 48 h at 23 °C and 4 °C. Changes in total aerobic mesophilic bacteria (TAMB), yeast and mold counts, and selected microbial groups were also checked. It was found that the analyzed compounds varied depending on the components of the mousses. Multi-component mousses contained the highest levels of TPC, TFC, and vitamin C, and had 2–5 times higher AC values compared to apple and pear mousses. Storage at room temperature resulted in TFC lowering of up to 25% in apple mousses and vitamin C reductions of up to 22% in multi-component mousses. During refrigerated storage, the highest losses were observed in pear mousses, with TPC decreasing by up to 13% and vitamin C by up to 11%. Among the minerals, magnesium and zinc levels decreased most significantly in apple mousses stored at 23 °C (up to 33% and up to 29%, respectively). Microbiological analysis revealed variability in TAMB, yeast, and mold counts, with refrigeration (4 °C) generally limiting microbial growth compared to room temperature (23 °C). Notably, no pathogenic bacteria were detected under any storage conditions, and the mousses retained a high microbiological quality even after room-temperature storage.

Biosintesis Nanopartikel Seng Oksida dengan Ekstrak Limbah Kulit Pisang Tanduk (Musa paradisiaca fa. corniculata)

The high amount of banana consumption in Indonesia has caused banana peel waste to increase, which can cause environmental pollution. One of the utilization of banana peel waste is as a metal nanoparticle synthesis. This study aims to synthesize ZnO nanoparticles with banana peel extract as a capping agent and determine the effect of solvent volume variation on the characterization of ZnO particles using variable volume of ethanol-water solvent with a ratio of 2:1 and 1:1 (v/v). This research uses maceration extraction method for 24 hours. Characterization of ZnO particles was carried out including Fourier Transform Infrared Spectroscopy (FTIR) and Particle Size Analyzer (PSA). In this study, the total polyphenol and flavonoid content in ethanol - water 1:1 (v/v) horn banana peel extract was higher at 4.944% and 5.940% than ethanol - water 2:1 (v/v) at 4.114% and 4.131%. Based on the results of FTIR testing, both samples have ZnO peaks where in ethanol - water 1:1 (v/v), 441 cm-1 and 619 cm-1, while ethanol - water 2:1 (v/v) is 428 cm-1. Then, from the PSA test results, the ethanol-water 1:1 (v/v) sample has a smaller average nanoparticle diameter of 135.6 nm than the ethanol-water 2:1 (v/v) sample which is 153.6 nm. ZnO nanoparticles were successfully synthesized using the natural capping agent banana peel extract. Different levels of secondary metabolites in each extract have an influence on the diameter of the synthesized ZnO nanoparticles.

Investigating the phytochemical production and antioxidant activity in four plant species belonging to the <i>asteraceae</i> family

Vietnam has a rich and profound traditional medicine system that is widely used today. Medicinal plants are used to treat colds, coughs, bone and joint diseases, digestion, respiratory diseases, etc. In this study, leaves of Artemisia vulgaris, Taraxacum officinale, Blumea balsamifera, and flowers of Xerochrysum bracteatum from the Asteraceae family were selected to determine the antioxidant capacity and relationship with the active ingredients in the plants. The methanolic extracts were screened for chemical compositions via the total phenolic content (TPC) assay, the total flavonoid content (TFC) assay, and DPPH radical scavenging activity. The highest radical scavenging activity was observed in the flowers of X. bracteatum (IC50 = 0.061 mg/mL), followed by the leaves of Taraxacum (IC50 = 0.313 mg/mL), A. vulgaris (IC50 = 1.367 mg/mL), and B. balsamifera (IC50 = 1.4502 mg/mL). The TPC of the studied plants ranged from 19.98 ± 1.355 to 195.78 ± 42.518 mgGAE/g extract, while the TFC ranged from 60.31 ± 1.725 to 339.14 ± 26.299 mgQE/g extract. The highest TPC and TFC were recorded in the methanol extract of X. bracteatum. The strongly negative correlation between the TPC and TFC and the IC50 values ​​(R2 = -0.78, R2 = -0.76) suggests that TFC and TPC could strongly contribute to the antioxidant activity of these plants. These results not only highlight the relevance of these plants in traditional medicine but also scientifically validate their use, particularly in the context of their antioxidant properties. The study underscores the close relationship between the traditional use of these plants and their scientifically observed effects, reinforcing the value of folk remedies.

Phenolic Compounds and Antioxidant Activity in Monovarietal Red Wines from Lazio Cultivars: A Chemometric Evaluation

Background: Antioxidant activity is currently one of the most significant characteristics of red wines, mainly attributable to phenolic components, that enhance health-promoting effects. To this purpose, it is necessary to implement simple, and reliable analytical methods for evaluating such bioactive compounds in wines according to their background. Objective: This research aims to characterize the phenolic and antioxidant activity of 48 commercial monovarietal red wines produced from eight native Lazio cultivars (“Cesanese del Piglio”, “Cesanese di Olevano Romano”, “Cesanese da Castel Franco”, “Olivella del Frusinate”, “Nostrano”, “Syrah”, “Merlot”, and “Nero Buono”), according to different winemaking techniques and vintage. Methods: The characterization was carried out through the chromatographic determination of anthocyanins (HPLC-PDA), spectrophotometric assays for total phenolic content (TPC), total flavonoid content (TFC), total phenolic acid content (TPAC), and antioxidant activity (AA) through ABTS, and DPPH assays, coupled with chemometric tools (Principal Component Analysis and Cluster Analysis). Results: The quantitative determination of phenolic compounds showed significant (p > 0.05) differences according to wine cultivars. Wine belonging to ‘Syrah’, ‘Nero Buono’, ‘Cesanese del Piglio’ and ‘Cesanese di Olevano Romano’ cultivars showed the highest TPC (2.673 – 4.094; 1.963 – 3.859, 2.104 – 3.794, and 2.668 – 3.549 mg GAE/L, respectively), as well as the highest TFC and TPAC. Conclusion: In addition, wines sharing cold maceration (i.e., COR and CP samples) resulted in the highest total anthocyanidin content with a variable malvidin and cyanidin distribution percentage; as well as younger wines (2019) showed the highest TPC and anthocyanidins content. In these regards, the natural groupings among samples obtained by chemometrics reinforce the influence of cultivar origin, the wine-making process, as well as wine aging on phenolic content and compositions, thus acting as fingerprints for specific grape cultivars.

Evaluation of Polyphenols, Antioxidant Activity, and Mineral Content in Honey Produced by <i>Apis mellifera</i> L. According to Floral Origin

Background/Objectives: Honey is in high demand because of its nutritional value, therapeutic properties, and sensory characteristics. Honey varieties were evaluated according to their floral origin and physicochemical composition, and total polyphenols, antioxidants, and minerals were analyzed for conformity and preference. Methods: Seven honey samples were analyzed for physicochemical composition using the Official Methods of Analysis method, total polyphenols using the Folin–Ciocalteu method, flavonoids using the ferric trichloride method, antioxidant activity and inhibitory concentration using the 2,2-diphenyl-1-picrylhydrazyl (DPPH) method, and ferric reducing capacity using the ferric-reducing antioxidant power (FRAP) method. Inductively coupled plasma optical emission spectroscopy was used to determine the mineral composition of the honey varieties. Results: The physicochemical compositions of the honey samples did not show significant differences and complied with national regulations. Total phenolic compound content was 336.9–1064.9 μg EAG/g, whereas flavonoids were between 0–151.9 μg EQ/g, with eucalyptus honey having the highest concentration. The antioxidant capacity measured using DPPH and FRAP was 0.095–0.186 and 0.168–0.654 mM TEAC/g, respectively. Variability was observed in the calcium (161.55 mg/kg in eucalyptus), magnesium (35.20 mg/kg in eucalyptus), potassium (901.17 mg/kg in eucalyptus), and sodium (172.18 mg/kg in pecan aroma) levels. Heavy metals did not exhibit significant values. The correlation between total flavonoid content and antioxidant capacity was weak; a strong correlation was observed between total phenolic compounds and antioxidant activity. Conclusions: The antioxidant activity, bioactive compounds, and minerals in honey vary according to its floral origin, which could be helpful in the pharmaceutical industry and gastronomy.

Antiproliferative Activity of Antioxidants-Rich Extracts from Olea europaea L. Leaves and Oil Against Six Cancerous Human Cell Lines

ABSTRACT The present work aims to study the cytotoxic effect of the methanolic extract of leaves and oil of three olive cultivars: Manzanillo, Picual and Koronieki. Against six cancer cell lines, namely MCF-7 and MDA (breast cancer), HepG2 (liver cancer), PC3 (prostate cancer), Caco-2 (colon cancer), and A549 (lung cancer) using the MTT method. The results obtained showed that Manzanillo leaf methanolic extract (LMME) and Manzanillo oil (OMME) gave the highest cytotoxicity with the lowest IC50 against Caco2 and A549 cell lines. To explain this result, the mechanism of action was studied at the chemical, cellular and molecular levels. The chemical composition analysis of LMME and OMME was performed by GC-MAS. Furthermore, phytochemical analysis was performed. In addition to cell cycle analysis and apoptosis induction, the gene expression of three apoptotic genes was measured. The total phenolic contents (TPC) and total flavonoid contents (TFC) of (LMME) were greater than that of (OMME). Both LMME and OMME had arrested cell cycle at G1 phase for each of Caco2 and A549 cells. LMME and OMME induce up regulation of Casp3 and BAX genes and down regulation of Bcl-2 gene. These results indicated that, LMME and OMME had anti-proliferation effect against Caco2 and A549 cells through induction of apoptosis pathway. Further detailed studies are needed to examine the effect of each fraction of whole extract.

Bioactive Content and in vitro Antioxidant and Enzyme-Inhibitory Potential of Leaf and Fruits of Parsnip (Pastinaca sativa L. subsp. Urens)

Parsnip (Pastinaca sativa L. subsp. urens) is one of the species of Pastinaca genus. This plant has been traditionally used worldwide for the treatment of various diseases and cultivated for its nutritional values. The aim of this study was to determine the antimicrobial and enzyme-inhibitory potentials of the fruits and leaves of parsnips as well as their bioactive properties such as their antioxidant activities, total phenolic and flavonoid contents in their hexane and ethanol extracts. The total phenolic and flavonoid contents were determined using Folin-Ciocalteu and aluminum chloride colorimetric methods, respectively. The antioxidant activities of extracts were determined by three methods of DPPH and ABTS radical scavenging activities and iron-chelating ability. In the leaves, the highest total phenolic content (60.94 mg GAE/g extract) was found in ethanol extracts while the highest total flavonoid content (21.47 mg RuE/g extract) was determined in hexane extracts. Ethanol extracts of leaves showed the highest radical scavenging activities in both assays of DPPH and ABTS with the IC50 values of 1039±1.35 and 150.7±0.81 µg/mL, respectively. Growth inhibition zone diameters (mm) of PSFE, PSLE, PSFH, PSLH (2 mg/mL) against reference microorganisms were -/-/15/15, -/-/15/14, 10/10/22/15, -/-/15/14 and MIC values -20>/20>/20>/20>, 20>/20>/20>/2.5, 0.625/10/-/-, 20>/20>/20>/20> mg/mL for Staphylococcus aureus ATCC6538, Micrococcus luteus ATCC9341, Bacillus subtilis ATCC6633, Candida albicans ATCC14053, respectively. Antimicrobial activity was not determined against other reference microorganisms.

The role of proline and betaine functionalized zinc oxide nanoparticles as drought stress regulators in Coriandrum sativum: an in vivo study

Drought stress poses a significant environmental challenge that substantially hinders plant growth and agricultural productivity on a global scale. This stress disrupts water uptake, moderates photosynthetic efficiency, and induces oxidative stress in plants, resulting in considerable yield reductions. Recent advancements in nanotechnology present promising approaches to enhance plant resilience against abiotic stresses. To study the influence of drought stress on vegetative growth of coriander plants and its mitigation by zinc oxide nanoparticles (ZnO NPs) coupled with proline (ZnO-P) and betaine (ZnO-B), a pot experiment was designed. Plants were exposed to drought stress and treated with 50 mg/kg and 100 mg/kg ZnO NPs, ZnO-P, and ZnO-B NPs (ZnO nanocomposites). Plants were watered on wilting. It was observed that in control drought stress plants, the pots were irrigated 8–10 times while the watering requirement reduced for 5–6 time to the plants when fertilized with ZnO nanocomposites. Significant improvement in vegetative parameters (length and weight) was observed under ZnO nanocomposites treatment. At 50 mg/kg of ZnO-P NPs, shoot length increased up to 71% while root length increased up to 24%. Shoot and root fresh weight was improved (5 g and 1.5 g, respectively) at 50 mg/kg of ZnO-P NPs. The total phenolics and flavonoid contents that were increased in drought stress plants, significantly decreased both in roots and shoots of ZnO nanocomposites. Ttotal antioxidant and total reducing power responses also remarkably decreased in shoots of ZnO nanocomposites while in roots the variation was inconsistent. The free radical scavenging potential was also variable in both shoots and roots of coriander plants. Decrease in super oxide and per oxide dismutase activities (up to 33% and 32%, respectively) were observed when pots were added with ZnO nanocomposites. The findings demonstrate that drought stress can be reduced by applying proline and betaine doped ZnO nanoparticles as fertilizer that mitigate the drought condition, strengthen the plants against stress, and also reduces the watering time to the crops to save water. Future research could explore the molecular mechanisms underlying these effects and evaluate the efficacy of ZnO nanocomposites in other crop species and under field conditions to further validate their potential for widespread agricultural use.

PERBANDINGAN PROFIL FITOKIMIA DAN GCMS MENGGUNAKAN EKSTRAKSI MASERASI DAN SOKHLETASI SERTA PROFIL HISTOKIMIA DAUN SUNGKAI (P. canescens Jack.)

Sungkai leaf (P. canescens Jack.) is a native plant of Indonesia that has long been used in traditional medicine as a mouthwash and minor wounds. Sungkai leaves P. canescens Jack. are believed by the community to have many health benefits. Several studies have shown that sungkai leaves (P. canescens Jack.) contain active compounds. As for the extraction process, it is known that the content of active compounds obtained in the sungkai leaf extract is strongly influenced by the selection of solvents used and the extraction method carried out. In previous studies, total flavonoid content has been obtained using maceration and soxhletation methods in sungkai leaf extracts, where flavonoids are one of the profiles of secondary metabolite compounds possessed by sungkai leaves. In the next research, the profile of sungkai leaves will be determined more thoroughly through phytochemical screening and GCMS analysis of the extraction results using maceration and soxhletation methods. The histochemical profile of sungkai leaves will also be determined. Histochemical test results show that flavonoid compounds are evenly distributed in all tissues of sungkai leaves, besides that some tissues in sungkai leaves show positive results for the presence of alkaloid, steroid, terpenoid, tannin, phenol and saponin compounds.The results of phytochemical screening showed that sungkai leaves positively contained secondary metabolite compounds in the form of alkaloids, flavanoids, steroids, terpenoids, tannins, phenolics, saponins while the results of GCMS analysis for the maceration process obtained metabolite compounds in the form of terpenoids, alkaloids, and phenolics, while for the sokletation process obtained metabolite compounds in the form of flavonoids, terpenoids, and phenolics.

Cupressus torulosa, a Source of Antioxidant Polyphenols: An Analytical and Pharmacological Study.

Cupressus torulosa (family Cupressaceae), widely distributed in the northwestern Himalayan region of India, is a coniferous aromatic tree traditionally used for its aerial parts. Its needles are renowned for their anti-inflammatory, anticonvulsant, antimicrobial, and wound-healing properties. Antioxidants from this plant are vital in combating oxidative stress, which are implicated in these diseases. This study employed a range of methods, including in vitro, in vivo, and ex vivo assays; biochemical estimations such as Total Phenolics Content and Total Flavonoids Content; and UPLC-QTOF-MS analysis, to evaluate the antioxidant potential of Cupressus torulosa needles. Initial screenings demonstrated promising antioxidant activity of 25% aqueous methanol extract of the needles, with SGOT and SGPT values of 55.28±57.07 and 52.27±19.50 IU/L, respectively, when compared to the positive control glibenclamide. Fractionation of the extract into ethyl acetate and butanol fractions revealed that the ethyl acetate fraction showed notable activity, with an EC50 value of 85.6 μg/mL in the DPPH assay, indicating effective free radical scavenging and reduced oxidative damage. UPLC-QTOF-MS characterization of ethyl acetate fraction in negative ion mode identified 34 metabolites, including 10 key antioxidant compounds. These findings underscore C. torulosa's potential as a source of bioactive antioxidants, highlighting its value for pharmaceutical and nutraceutical applications. The research provides a foundation for further isolation, characterization, and clinical testing of these compounds, enhancing our understanding of natural antioxidants in addressing oxidative stress-related conditions.

Phenolic and volatile compounds, total protein content, antioxidant and antidiabetic activities of leaves of Palicourea padifolia (Rubiaceae)

Background and Aims: Information on the chemical composition and biological activities of Palicourea padifolia is scarce. This study aimed to 1) measure the total content of nutrients, macroelements, proteins, and secondary metabolites, 2) conduct metabolomic analyses on phenolic and volatile compounds, and 3) assess the antioxidant and antidiabetic activities from the leaves of this species. Methods: The total content of nutrients and macroelements was determined by spectroscopic, spectrometric, and spectrophotometric approaches. The total content of alkaloids, terpenes, phenols, flavonoids, tannins, and proteins was determined by spectrophotometric approaches. Volatile and phenolic compounds were identified by gas and liquid chromatography, respectively, coupled to mass spectrometers. The antioxidant activity was determined by 2,2-diphenyl-1-picrylhydrazyl (DPPH) and 2,2’-azino-bis-(3-ethylbenzothiazoline-6-sulfonic acid) (ABTS) assays, and the antidiabetic potential was determined by the inhibition of α-glucosidase. Key results: The leaves of P. padifolia were rich in Ca, Na, and Mg and exhibited a low protein content. The leaf methanolic extract (LME) contained high levels of alkaloids, phenols, and terpenes, while flavonoids were present at low concentrations. The major phenolic compounds identified were chlorogenic acid, scopoletin, trans-cinnamic acid, and (-)-epicatechin. In addition, a leaf petroleum ether extract (LPE) contained mainly phytol, palmitic acid, (Z)-7-tetradecenal, octadecanoic acid and linoleic acid. The leaves exhibited a high antioxidant capacity, inhibiting DPPH and ABTS radicals, and the LME showed low inhibition of α-glucosidase enzyme. Conclusions: Palicourea padifolia leaves had a rich composition of cations such as Ca, Na, and Mg. In addition, the LME contained alkaloids, terpenes, lipids, and phenolics, which support the potent antioxidant capacity. In contrast, the LME exhibited a low inhibition of the α-glucosidase enzyme.

Gel cream loaded with <i>Lafoensia pacari</i> phenolics-containing extract with antioxidant and photoprotective activities

Lafoensia pacari`s leaves have phenolic compounds which may lead to photoprotective and antioxidant properties. The aim of this study was to investigate these activities in the L. pacari phenolics-containing extract (LPE) and to obtain gel cream formulations containing LPE and that have photochemoprotective activity. Phenolic compounds and antioxidant activity were determined. Polyacrylamide & C13-14 Isoparaffin & Laureth-7 (Focus gel® 305) formulation, it added synthetic sunscreen Ethylhexyl methoxycinnamate (Eusolex 2292®) or with both Eusolex 2292® and LPE were prepared. The in vitro sun protection factor (SPF) of these formulations was determined by diffuse reflectance spectroscopy. Preliminary stability of gel creams was evaluated. Total phenols and flavonoids content were 3.31% and 0.315%, respectively. LPE showed antioxidant activity by DPPH, with an EC50 of 5.3 µg. mL-1 and by FRAP methods, in which 1g of the extract reduces 323.62 µM/L of ferrous sulfate. LPE showed an additive effect on the value of SPF when associated with Ethylhexyl methoxycinnamate, an increase of 22% in FPS of the formulation (F3). The data obtained allow us to suggest a trend towards the photoquimoprotective effect of the L. pacari phenolics-containing extract in the studied conditions.

Optimizing Polyphenolic Extraction from Wild Guava Leaves: A Response Surface Methodology Approach to Antioxidant and α-Glucosidase Inhibitory Activities

Objective Elevated concentrations of total phenolic content (TPC) and total flavonoid content (TFC) in extracts from wild Psidium guajava L. leaves are associated with their antioxidant and α-glucosidase inhibitory activities. This study aimed to determine the optimal ultrasound-assisted extraction conditions to maximize TPC, TFC yield, as well as antioxidant and α-glucosidase inhibitory potential. Methods The central composite design (CCD) of Response Surface Methodology (RSM) was employed for empirical model development with three levels of factors, including ethanol concentration (33.18 to 66.82% in distilled water), extraction time (1.59 to 18.41 min) and solvent-to-solid ratio (5.79 to 14.20 mL/g). Results The results indicated that under optimal conditions, the total phenolic content (TPC) and total flavonoid content (TFC) values were 152.954 mg GAE/g DW and 113.871 mg QE/g DW, respectively. These conditions included an ethanol concentration of 51.94%, an extraction time of 9.56 min, and a solvent-to-solid ratio (v/w) of 10.84 mL/g. Furthermore, the maximum values for DPPH and ABTS radical scavenging activities were 124.990 mg TE/g DW and 194.730 mg TE/g DW, respectively and the lowest IC50 for α-glucosidase inhibitory activity recorded at 11.946 µg/mL. The validated models exhibited strong consistency between the predicted and experimental values, with variations of less than 5% under optimal conditions. Additionally, Principal Component Analysis (PCA) also confirmed the appropriate model to predict the extraction yield of total polyphenol and flavonoid content, as well as their biological activities, including DPPH and ABTS radical scavenging and alpha-glucosidase inhibitory activities. Conclusions The enhancement of antioxidant and antidiabetic extraction processes in both the pharmaceutical and food industries through the use of ultrasound-assisted extraction from Wild Guava leaves can increase production to meet high demand. This efficiency is particularly noteworthy, as it demonstrates the advantages of using ultrasound in the extraction process.

Siamese neem tree as a natural preservative: Chemical profile, antioxidant properties, and antibacterial efficacy against foodborne pathogens and spoilage bacteria

The objective of the present study was to investigate the effect of various ethanol in water solvent systems (0, 25, 50, 75 and 100% v/v) on the extraction crude yield, total phenolic content, total flavonoid content, and chemical profile of Azadirachta indica (Siamese neem tree) leaf extracts. In addition, the antioxidant and antimicrobial properties were investigated using in vitro assays. Crude yield was highest for the water extract (5.78 g/100 g DW) and decreased with increased ethanol. Total phenolic and flavonoid contents were highest in the 75% ethanol extract (26.95 mg GAE/g crude and 23.73 mg QE/g crude, respectively). GC-MS analysis of the 75% ethanol extract revealed 33 bioactive compounds, accounting for 96.33% of the total area. Significant components included benzene, 1,4-bis(phenylmethyl)- (15.05%), and naphthalene, 1,6-dimethyl- (10.98%); also present were sterols, fatty acids, hydrocarbons, aromatic, and heterocyclic compounds, indicating a complex chemical profile. In antioxidant assays, the 75% ethanol extract revealed the highest DPPH radical scavenging activity (IC50: 143.03 mg/L), reducing power (IC50: 378.69 mg/L), and lipid peroxidation (IC50: 526.25 mg/L). However, the absolute ethanol extract exhibited both the highest metal chelating activity (IC50: 382.60 mg/L) and the strongest antimicrobial activity, inhibiting all 11 tested foodborne pathogenic and spoilage bacteria. The lowest minimum inhibitory concentration (MIC) of 25 mg/mL was observed for Staphylococcus aureus, Aeromonas hydrophila, Pseudomonas fluorescens, Latilactobacillus sakei, Streptococcus sp., and Lactococcus cremoris, with inhibition zone diameters of 27.21, 28.79, 28.19, 17.60, 15.09 and 11.20 mm, respectively. Similarly, the lowest minimum bactericidal concentration (MBC) of 25 mg/mL was obtained for S. aureus and L. sakei, indicating potent antibacterial effects against these species. Future studies should include direct comparative analyses of neem extracts and synthetic preservatives to evaluate further their relative efficacy and applicability in real-world food systems.

Endemic Dietary Herb Extracts Reduce Acrylamide and Enhance Sensory Characteristics of Potato Chips

This study evaluated the impact of soaking potato slices in water containing extracts from three endemic herbs, Lippia adoensis var. adoensis (kesse), Lippia adoensis var. koseret (koseret), and Thymus schimperi Ronninger (tosign), on acrylamide content and sensory attributes of fried potato chips. The total phenolic content (TPC) and total flavonoid content (TFC) of the extracts were measured using the Folin-Ciocalteu and aluminum chloride colorimetric methods, respectively. Antioxidant activity was assessed using ferric-reducing antioxidant power (FRAP) and ferrous chelating activity (FICA). Acrylamide levels were quantified using high-performance liquid chromatography (HPLC), while sensory attributes, including taste, color, odor, crispiness, and overall acceptability, were assessed. Kesse extract exhibited the highest TPC (30.20 ± 1.23 mg GAE/g) and TFC (15.87 ± 1.06 mg QE/g), FRAP (63.95 ± 1.53 μg/mL), and FICA (110.15 ± 3.27 μg/mL). Potato chips treated with kesse extract reduced acrylamide levels to 0.576 mg/kg (63.4%), followed by tosign (0.654 mg/kg, 58.5%) and koseret (0.870 mg/kg, 44.8%), while butylated hydroxytoluene (BHT) achieved a reduction to 1.097 mg/kg (30.4%) compared to the control (1.58 mg/kg). A significant negative correlation was observed between TFC (R2 =0.9956) and TFC (R2 = 0.8802) with acrylamide levels (p < 0.05). Sensory evaluation revealed that potato chips treated with kesse extract scored significantly higher in taste, odor, and color, leading to enhanced overall acceptability. These findings demonstrate the potential of these endemic dietary herbs as natural antioxidants to mitigate acrylamide formation and improve the sensory quality of potato chips, suggesting practical applications in food processing and health-conscious diets.

Polyphenol compounds contributing to the improved bioactivities of fermented Rubus chingii Hu

This research aims to evaluate the phenolic composition, antioxidant and enzyme inhibition activities of fermented Rubus chingii Hu wine, and explore the correlation between them. TPC (Total Phenolic content) and TFC (Total Flavonoid content) increased rapidly from 0 h to 72 h, followed by a slight decrease in TPC and a significant decrease in TFC. Fermentation could significantly increase the antioxidant activity and α-amylase/α-glucosidase enzyme inhibitory activity of Rubus chingii Hu. A total of 39 polyphenols and organic acids in fermented Rubus chingii Hu were identified by UPLC-ESI-Q-TOF-MS/MS and 11 of them were quantitatively analyzed. After fermentation, the contents of all the detected polyphenol compounds, except for quercetin and ellagic acid, significantly increased (p < 0.05). Correlation analysis showed that protocatechuic acid and catechin played an important role in the antioxidant activity of fermented Rubus chingii Hu, while protocatechuic acid and hypericin played an important role in the α-amylase inhibition activity. This study indicated that Rubus chingii Hu could be applided as a potential meterial for the wine production, and has the potential to be a functional food for promoting health.

Mechanism of deep eutectic solvents based extraction of phenolic and flavonoid compounds from peony petals

Deep eutectic solvents (DES) have exhibited great potential in the extraction of active ingredients from flowers. In this study, ternary DESs were designed for the extraction of phenolic and flavonoid compounds from peony petals. When the molar ratio of ChCl:EG:U was 1:2:2, and the water content was 30 %, the maximum extraction yields of total phenolic content (TPC) and total flavonoid content (TFC) were achieved, reaching 109.30 mg GAE/g and 56.93 mg RE/g, respectively. Meanwhile, cellulose nanofibers were prepared. The relationship model with extraction yield as the target was established by multivariate analysis. The model indicated that the property parameters of the HBD had a significant impact on the extraction yields of TPC and TFC. At the molecular level, Density functional theory (DFT) was employed to explore the extraction mechanism. The analysis revealed that hydrogen bonding was the main interaction force. The maximum binding energy between DES and rutin was −89.03 kcal/mol. This study provides an efficient extraction solvent and insights into the mechanism of extracting the phenolic and flavonoid compounds from peony petals.

Biosynthesis of ZnO nanocomposites from Mentha spicata applications of antioxidant, antimicrobial and genotoxicity advances in MCF-7 cell line

This study focuses on enhancing the, Spearmint (Mentha spicata), an aromatic herb indigenous to Europe and Asia, which is valued for its refreshing flavor and potential health benefits. This herb is widely utilized in culinary practices, medicinal applications, and cosmetic formulations. The ethanol extract derived from the M. spicata leaf contains is rich secondary metabolites with various bioactive properties: Specifically, such as tannins, flavonoids, and polyphenols are known for their antioxidant and anti-inflammatory effects, saponins help reduce cholesterol, and alkaloids have analgesic properties. The extract has a total flavonoid content (TFC) of 231.37 ± 2.05 mg GAE/g and a total phenol content (TPC) of 247.32 ± 5.07 mg GAE/g. Zinc oxide (ZnO) nanoparticles were synthesized from this extract and subsequently characterized through various analytical techniques. The absorbance measurement at 437 nm confirmed the successful nanoparticle synthesis. FTIR spectra showed water-related absorption bands at 3330 cm−1 and 3337 cm−1. Scanning electron microscopy (SEM) indicated the presence of spherical nanoparticles of about 25.4 nm, while transmission electron microscopy (TEM) illustrated particles ranging from 20 to 50 nm with high crystallinity and a lattice spacing of 0.297 nm. X-ray diffraction (XRD) analysis confirmed their crystalline structure with distinct Bragg reflections at 39.1°, 46.1°, 68.7°, and 79.2°, which corresponding to (111), (200), (220,311) planes, respectively (JCPDS card no. 01–080-1876). Energy-dispersive X-ray spectroscopy (EDX) confirmed the high purity of the synthesized ZnO nanocrystals. The nanoparticles demonstrated significant antioxidant activity with radical scavenging rates up to 97.33 %, effective antimicrobial properties, and notable anticancer activity, achieving 99.75 % inhibition of MCF-7 cells at 40 μg/mL. These findings highlight the nanoparticles' potential applications in health and medicine.

Invivo and ex-vivo evaluation and characterization of wound healing effect of topical calendulaofficinalis and turmeric cream in diabetic rats.

Objective: To evaluate wound healing by topically administration of calendulaofficinalis and tumeric cream to diabetic rats. Study Design: Observational Cross-sectional study Setting: Department of Pharmaceutics, Faculty of Pharmacy, BahaUddin Zakariya University, Multan, Pakistan Period: October 2020-march 2021. Method: Different batches of hydrophilic cream bases (C1-C6) were developed and characterized. The optimized base composition (C6) was loaded with calendula Officinal is extract and turmeric powder as an active ingredient (C7) and evaluated the rate at which wounds heal in diabetic rats. Calendula officinal is and turmeric were combined in a cream, as different stability parameters of the creams were analysed at different temperature. Microbiological action of the cream was also examined. Results: The formulation was homogenous, stable with pH 6.29±0.03, viscosity 381± 6.96 Cps and the microbiological quality met the requirements of European pharmacopeia. The total flavonoid content was less than 1. The formulation showed accelerated wound healing with more than 95% wound contraction after tenth day. Conclusion: The result were favorable and suggested that topical administration of Calendula officinal is and turmeric powder combination would enhance wound healing in diabetic rats with potential for diabetic foot ulcer treatment. Moreover, the designed formulation poses good quality emulsion system stabilizing the active ingredient as well as appropriate release of medicinal agents.