Source Of Valuable Phytochemicals Research Articles

Evaluation of In-vitro Anti-Inflammatory, Anti-Fungal, Thrombolytic, Membrane Stabilizing and Cytotoxic Properties of (Camellia chrysantha Hu Tuyama)

The current study was set out to look into the anti-inflammatory, anti-fungal, cytotoxic, thrombolytic and membrane stabilizing activities of the methanolic extract from the leaf of Camellia chrysantha (Hu) Tuyama (MECCL). Primary evaluation of MECCL was performed via phytochemical screening. Phytochemical analysis of the leaf extract revealed the presence of reducing sugar, flavonoids, alkaloids, and steroids. Anti-inflammatory activity test was done using egg albumin denaturation assay. In the result of MECCL’s anti-inflammatory test showed 88.88% compared to the standard acetyl salicylic acid 98.56%. The anti-fungal activity test was performed by Disc Diffusion method using zone of inhibition against four fungi. MECCL showed moderate antifungal activity compared to standard Griseofulvin against Aspergillus niger, Saccharomyces cerevisiae (yeast), Penicillium notatum. Zones of inhibition of the fungi Aspergillus niger, Saccharomyces cerevisiae (yeast), Penicillium notatum is 11mm, 14mm and 14mm at the concentration of 700 µg/disc, which is close to the standard Griseofulvin 19mm, 20mm, and 21mm respectively at 50 µg/disc concentration. Mucor hiemalis showed mild zone of inhibition in 300, 500, and 700 µg/disc (7mm). Brine Shrimp lethality bioassay method was used to test the lethality of the methanolic leaf extract. The extract showed significant cytotoxic activity against brine shrimp nauplii with LC50 value of 0.843 µg/mL when compared with the standard Vincristine sulphate (LC50 value: 0.608 µg/mL). Comparison with positive control Vincristine sulphate signifies that cytotoxicity exhibited by MECCL and further bioactivity guided investigation can be done to find potent antitumor compounds. In thrombolytic activity test, MECCL demonstrated 95.69% thrombolysis which was significant compared to standard Streptokinase (SK) which demonstrated 91.304 % thrombolysis. While doing membrane stabilizing activity test, Heat induced hemolysis assay was performed and the percent of protection was 85.35 compared to the standard DS 73.63 which was very significant. The results highlight the potential of Camellia chrysantha (Hu) Tuyama as a valuable source of phytochemicals that possess notable anti-inflammatory, thrombolytic, and membrane-stabilizing properties. The methanolic leaf extract also shows moderate antifungal and cytotoxic effects, suggesting potential for future therapeutic advancements.

QUANTITATIVE ANALYSIS OF ANTIOXIDANT COMPOUND CLASSES IN VEGETATIVE ORGANS OF BITTER GOURD (MOMORDICA CHARANTIA L.)

Bitter gourd (Brâncuși cultivar) stems, tendrils and leaves from local production were studied for their content in some classes of nutritive compounds. Chlorophyll, carotenoids (total, β-carotene and lycopene), phenolic compounds (total, flavonoids, anthocyanins, tannins) and ascorbic acid were determined.Vegetative organs of M. charantia were found to contain high amounts of chlorophyll (1,643 mg/kg DW in leaves). The total carotenoid content was 176-386, with the highest amounts in leaves. While β-carotene was dominant in the stems (177 mg/kg), the other vegetative organs had significant amounts of lycopene (67 mg/kg in leaves).The total phenolic inventory ranged from 6,283 in leaves to 9,657 in stems. Flavonoids were dominant, by 50-70%, with the highest amounts in stems. Of these, 501-997 mg/kg were anthocyanins. Tannins constituted 8.1-9.3% of the phenolic inventory.Ascorbic acid concentration ranged between 1,7134 and 2,691 mg/kg, with the highest values in tendrils.In conclusion, vegetative organs of M. charantia can be a valuable source of phytochemicals.

Comparative Study of Cytotoxicity and Antioxidant, Anti-Aging and Antibacterial Properties of Unfermented and Fermented Extract of Cornus mas L.

Due to the high demand for products that can help treat various skin conditions, the interest in plant extracts, which are a valuable source of phytochemicals, is constantly growing. In this work, the properties of extracts and ferments from Cornus mas L. and their potential use in cosmetic products were compared. For this purpose, their composition, antioxidant properties and cytotoxicity against skin cells, keratinocytes and fibroblasts were assessed in vitro. In addition, the ability to inhibit the activity of collagenase and elastase was compared, which enabled the assessment of their potential to inhibit skin aging. Microbiological analyses carried out on different bacterial strains were made in order to compare their antibacterial properties. The conducted analyses showed that both dogwood extract and ferment have antioxidant and anti-aging properties. In addition, they can have a positive effect on the viability of keratinocytes and fibroblasts and inhibit the proliferation of various pathogenic bacteria, which indicates their great potential as ingredients in skin care preparations. The stronger activity of the ferment compared to the extract indicates the legitimacy of carrying out the fermentation process of plant raw materials using kombucha in order to obtain valuable products for the cosmetics industry.

Effect of Temperatures on Drying Kinetics, Extraction Yield, Phenolics, Flavonoids, and Antioxidant Activity of Phaleria macrocarpa (Scheff.) Boerl. (Mahkota Dewa) Fruits.

Phaleria macrocarpa (Scheff.) Boerl. or 'Mahkota Dewa' is a popular plant found in Malaysia as it is a valuable source of phytochemicals and therapeutic properties. Drying is an essential step in the storage of P. macrocarpa fruits at an industrial level to ensure their availability for a prolonged shelf life as well as preserving their bioactive compounds. Hence, this study evaluates the effect of different temperatures on the drying kinetics, extraction yield, phenolics, flavonoids, and antioxidant activity of P. macrocarpa fruits. The oven-drying process was carried out in this study at temperatures of 40 °C, 50 °C, 60 °C, 70 °C, and 80 °C. Six thin-layer drying models (i.e., Lewis, Page, Henderson and Pabis, two-term exponential, Logarithmic, and Midilli and Kucuk models) were evaluated to study the behaviour of oven-dried P. macrocarpa fruits based on the coefficient of determination (R2), root mean square error (RMSE), and chi-square (χ2). The quality of the oven-dried P. macrocarpa fruits was determined based on their extraction yield, total phenolic content (TPC), total flavonoid content (TFC), and antioxidant activity (2,2-diphenyl-1-picrylhydrazyl) using ultrasound-assisted extraction. The results showed that the time for moisture removal correspondingly increased in the oven-dried P. macrocarpa fruits. Apparently, the Midilli and Kucuk model is the most appropriate model to describe the drying process. The range of effective moisture diffusivity was 1.22 × 10-8 to 4.86 × 10-8 m2/s, and the activation energy was 32.33 kJ/mol. The oven-dried P. macrocarpa fruits resulted in the highest extraction yield (33.99 ± 0.05%), TPC (55.39 ± 0.03 mg GAE/g), TFC (15.47 ± 0.00 mg RE/g), and DPPH inhibition activity (84.49 ± 0.02%) at 60 °C based on the significant difference (p < 0.05). A strong correlation was seen between the antioxidant activity, TPC, and TFC in the oven-dried P. macrocarpa fruits. The current study suggests that the oven-drying method improved the TPC, TFC, and antioxidant activity of the P. macrocarpa fruits, which can be used to produce functional ingredients in foods and nutraceuticals.

Single-step extraction of bioactive compounds from cruciferous vegetable (kale) waste using natural deep eutectic solvents

Cruciferous vegetables such as kale contain various health-promoting phytochemicals, and leaves rejected from harvesting could be a valuable source of phytochemicals. Conventional organic solvents used for the recovery of these bioactive metabolites are hazardous, and therefore more benign equivalents are sought. This work explores the use of natural deep eutectic solvents (NADESs) with different hydrophilicity/hydrophobicity to recover polyphenols, carotenoids and chlorophylls from kale waste. Enhanced extraction of polyphenols was achieved by the aqueous solutions of hydrophilic glycerol-based NADESs, with yields of up to 2.2-fold higher than just using methanol. The antioxidant capacity of the aqueous extracts showed a strong correlation with their total phenolic contents. The best solvent in extracting polyphenols (glycerol:betaine at a molar ratio of 3:1) was further investigated to optimise its process conditions. The optimised extract provided the greatest stability of the bioactive polyphenols by retaining 91.7 and 88.6% of the original contents after 30 days of storage at 4 and 25 °C, respectively. Furthermore, this extraction approach was integrated with ethyl acetate, a bio-based solvent, to promote the simultaneous recovery of polyphenols (16.83 mg GAE (gallic acid equivalents) g−1 DW (dry weight)), carotenoids (0.91 mg g−1 DW) and chlorophylls (7.86 mg g−1 DW) from kale waste. After extraction, the immiscible aqueous NADES- and ethyl acetate-phases rich in polyphenols and carotenoids/chlorophylls, respectively, can be easily separated for different applications.

UPLC-QToF-MS based fingerprinting of polyphenolic metabolites in the bark extract of Boehmeria rugulosa Wedd.

Boehmeria rugulosa Wedd. is an evergreen tree of Urticaceae family. Its bark has been extensively used in ethno-medicinal system for various ailments such as bone fracture, sprain, snakebite, and wound healing. Phyto-metabolites, which are considered as the principle components for biological activities, have been least explored for this plant. The present work investigated metabolite profiling of the stem bark of B. rugulosa in water extract using Ultra Performance Liquid Chromatography Quadrupole Time of Flight Mass Spectrometry (UPLC-QToF-MS) technique coupled with the UNIFI platform. We identified, for the first time, 20 polyphenolic metabolites belonging to seven groups: caffeoylquinic acids, coumaroylquinic acids, flavan-3-ols, oligomeric flavonoids, caffeic acid derivatives, coumaric acid derivative, and flavone glycoside in the B. rugulosa extract. UNIFI informatics-coupled UPLC-QToF-MS platform aids in the quick identification and fragmentation pattern of metabolites, with higher degree of reproducibility. The present study provides a chemical and therapeutic basis for further exploration of B. rugulosa as a valuable source of phytochemicals that could be instrumental in deciphering its ethno-medicinal utility for various human diseases.

Phytochemical Analysis of the Methanolic Extract and Essential Oil from Leaves of Industrial Hemp Futura 75 Cultivar: Isolation of a New Cannabinoid Derivative and Biological Profile Using Computational Approaches.

Cannabis sativa L. is a plant belonging to the Cannabaceae family, cultivated for its psychoactive cannabinoid (Δ9-THC) concentration or for its fiber and nutrient content in industrial use. Industrial hemp shows a low Δ9-THC level and is a valuable source of phytochemicals, mainly represented by cannabinoids, flavones, terpenes, and alkaloids, with health-promoting effects. In the present study, we investigated the phytochemical composition of leaves of the industrial hemp cultivar Futura 75, a monoecious cultivar commercially used for food preparations or cosmetic purposes. Leaves are generally discarded, and represent waste products. We analyzed the methanol extract of Futura 75 leaves by HPLC and NMR spectroscopy and the essential oil by GC-MS. In addition, in order to compare the chemical constituents, we prepared the water infusion. One new cannabinoid derivative (1) and seven known components, namely, cannabidiol (2), cannabidiolic acid (3), β-cannabispirol (4), β-cannabispirol (5), canniprene (6), cannabiripsol (7), and cannflavin B (8) were identified. The content of CBD was highest in all preparations. In addition, we present the outcomes of a computational study focused on elucidating the role of 2α-hydroxy-Δ3,7-cannabitriol (1), CBD (2), and CBDA (3) in inflammation and thrombogenesis.

Efficiency of Multiple Extraction Solvents on Antioxidant, Cytotoxic, and Phytotoxic Potential of Taraxacum officinale (L.) Weber ex F.H. Wigg. from Poonch Valley, Azad Kashmir, Pakistan.

Background Different parts of Taraxacum officinale (L.) were used in traditional medicine in various parts of the world for the treatment of health problems, and they possess significant biological activities. The present study aimed to estimate phytochemical and biological activities of T. officinale using different extraction solvents. Methods Methanolic, acetone, and n-hexane extracts of selected species were prepared, and ten secondary metabolites were examined using standard protocols. The antioxidant activity was performed using three in vitro methods, namely, DPPH assay, total reducing power (TRP) assay, and total antioxidant capacity (TAC). Toxicological analysis was done using the brine shrimp cytotoxic assay and radish seed phytotoxic assay. Results The T. officinale methanolic extract showed the highest phenolic (178.27 ± 17.17 mg/GAE/g) and flavonoid (18.50 ± 1.64 mg QE/g) contents. Similarly, the methanolic extract also revealed the highest DPPH activity (32.80 ± 9.66 IC50), reducing potential (0.53 ± 0.02 mg/g), and TAC (19.42 ± 0.97 mg/g) as compared to the acetone and n-hexane extracts. The Pearson correlation analysis confirmed a strong positive correlation (r > 0.9) between total phenolic content (TPC), total flavonoid content (TFC), and all antioxidant assays. Furthermore, a heat map displayed the methanolic extract (red color) as a valuable source of phytochemicals and antioxidant agents. Moreover, the T. officinale methanolic extract also showed the highest (7.12 ppm) cytotoxic potential whereas both methanolic and acetone extracts were revealed as moderate phytotoxic agents when compared with the standard. Conclusion The T. officinale methanolic extract exhibited comparatively notable phytochemicals that are actively involved in antioxidant activities and possess toxicological properties. This upholds the folkloric use of T. officinale as a possible source to develop natural plant-based drugs. Further investigations to isolate bioactive compounds and elements and on their safety need to be conducted.

Antioxidant activity of extracts obtained by high-pressure extraction procedures from Asparagus stipularis Forssk

Roots and rhizomes of Asparagus stipularis Forssk were separately extracted using supercritical CO2 extraction (SCCO2) and pressurized liquid extraction (PLE) and their Total Phenols Content and antioxidant potential was investigated. The results indicated that the roots and rhizomes are a potential source of natural antioxidants. The PLE method gave better extraction yields than SFE and its fractions present the highest antioxidant activity. Direct evaluation of antioxidant capacity using the QUENCHER procedure showed that also the solid residue of the plant material remaining after the SCCO2 and PLE may be of interest as a source of valuable phytochemicals.

The Bark of Picea abies L., a Waste from Sawmill, as a Source of Valuable Compounds: Phytochemical Investigations and Isolation of a Novel Pimarane and a Stilbene Derivative.

In this work, the sawmill waste from Picea abies debarking was considered as source of valuable phytoconstituents. The extraction was performed using different ethanol/water mixtures, and characterization was obtained by LC-MSn. This latter revealed flavonoid glycosides, lignans, and procyanidins. Extraction with organic solvents (dichloromethane and methanol) and chromatographic separations of the obtained extracts by silica column followed by semi-preparative HPLC led to the isolation of polyphenols and terpenoids such as 21α-metoxy-serrat-14-en-3-one, 21α-hydroxy-serrat-14-en-3-one, pinoresinol, dehydroabietic acid, 15-hydroxy-dehydroabietic acid, 7-oxo-dehydroabietic acid, pimaric acid, 9β-pimara-7,15-dien-19-ol, 13-epi-manoyl oxide, taxifolin-3′-O-glucopyranoside, trans-astringin, and piceasides. Piceaside V and 9β-pimara-7-keto-19β-olide, two novel compounds identified for the first time in P. abies bark, were isolated, and their structures were elucidated using 1D and 2D NMR and MS techniques. The polyphenolic composition of the methanolic portion was also investigated using LC-MSn, and the piceaside content was estimated. To assess the antioxidant activity of main constituents, semi-preparative HPLC was performed on the methanolic extract, and the obtained fractions were assayed by using the DPPH test. Overall, this work shows the potential usefulness of P. abies bark as a source of valuable phytochemicals.

Phytochemical composition of different plant parts of Acacia nilotica (L.) and their medicinal values

Plant-derived medicines are long being used for the prevention and treatment of various human ailments. For the last few decades, plants are widely being explored for their active ingredients due to their immense potential in the treatment of critical illnesses. Thus, in recent years, exponential growth can be seen in the field of herbal medicines. Medicinal plants are a unique source of valuable phytochemicals. Their use in different medicine systems is gradually increasing due to their cost-effectiveness, easy availability and natural origin with fewer or no side effects. Acacia nilotica (L.) is a member of the family Fabaceae, commonly found in tropical and sub-tropical regions and the plant is widely known for its enormous medicinal values. Every plant part of A. nilotica is a source of many bioactive important secondary metabolites that are widely useful for the cure of various human diseases and the development of new drugs. An exhaustive literature survey revealed that tannins, flavonoids, alkaloids, polyphenols, fatty acids and carbohydrates are present as major classes of phytochemicals in different plant parts of A. nilotica. These phytochemicals exhibit significant antioxidant, anti-inflammatory, antibacterial, antifungal, antidiarrheal, antihypertensive, antispasmodic, anthelmintic, antiplatelet aggregation, anticancer and antiviral activities. The present review is aimed to organize the comprehensive information available on phytochemical composition and medicinal properties of different plant parts of A. nilotica viz. leaves, bark, flowers, seeds, pods, gum and roots. The study is useful to explore the therapeutic potential of different plant parts of A. nilotica which will further help in the development of new promising, safe, cost-effective drugs with a high therapeutic index from the different parts of the Acacia plant.

Health Beneficial Potential of Pectolinarigenin on Human Diseases: An Updated Review of Medicinal Importance and Pharmacological Activity

Medicinal Plants are valuable source of phytochemicals which have been used in the medicine as source of raw material since very ancient time in the world. Flavonoids are one of the important classes of phytochemical basically present in the fruits, vegetables, grains, wine, tea etc. Flavonoids also play an important role in the defense mechanism of plants and produce different colours in the plants. Pectolinarigenin is a natural flavonoidal compound having molecular formula C&lt;sub&gt;17&lt;/sub&gt;H&lt;sub&gt;14&lt;/sub&gt;O&lt;sub&gt;6&lt;/sub&gt; and molecular weight 314.28. Pectolinarigenin is present in various plants and examples are Clerodendrum phlomidis, Eupatorium odoratum, Cirsium chanroenicum, Cirsium japonlcum, Chromolaena odorata, Cirsium setidens, and Trollius chinensis. Pectolinarigenin acts as an anticancer agent against various types of human malignancies, such as lung cancer, melanoma, hepatocellular carcinoma and colorectal adenocarcinoma. It has also anti-inflammatory, anti-allergy, cytotoxic and hepatoprotective properties. Pectolinarigenin gained attention from researchers and clinicians due to their anticancer properties and in future it could be the best choice for cancer treatment. The purpose of this review paper is to summarize all the pharmacological properties of pectolinarigenin on cancer and other disorders, describe the mode of action and possible pathways for cellular level action. The present review initially highlights the current status of flavonoids and their pharmaceutical importance, role of pectolinarigenin in human disorders, and in later section, summarizes analytical techniques of pectolinarigenin as lead molecules. This review will support all the ongoing research of pectolinarigenin through out world for their beneficial properties in all the scientific discipline.

Characterization of Phytochemicals in Berry Fruit Wines Analyzed by Liquid Chromatography Coupled to Photodiode-Array Detection and Electrospray Ionization/Ion Trap Mass Spectrometry (LC-DAD-ESI-MSn) and Their Antioxidant and Antimicrobial Activity.

Fruits are a valuable source of phytochemicals. However, there is little detailed information about the compounds contained in fruit wines. In this study, wines from six different berries were analyzed using HPLC-DAD-ESI-MSn. About 150 compounds were identified, including anthocyanins (34), hydroxycinnamic acids (12) and flavonols (36). Some of the compounds were identified for the first time in berry wines. The blackberry wines were found to contain the largest number of bioactive compounds (59). Elderberry wines where the richest source of polyphenols (over 1000 mg/L) and contained the largest amounts of all of the analyzed groups of compounds (hydroxycinnamic acids, anthocyanins and flavonols). The lowest concentration of polyphenols was observed in the wines made from cranberries and bilberries (less than 500 mg/L). The antioxidant activity was determined in relation to ABTS+, DPPH, and FRAP. The highest values were observed in the blackberry wines, and the lowest for the cranberry wines. The wines were analyzed to test their antimicrobial activity. Five of the six wines (with the exception of elderberry wine) inhibited Bacillus cereus growth and two (blackberry and cranberry wines) were active against Listeria monocytogenes.

Assessment of flavonoids and phenolic compound accumulation in invasive Solidago canadensis L. in Slovakia

Solidago canadensis L. was introduced to Europe as an ornamental plant from North America in 1645 and began to spread during the XIX-XX centuries. Nowadays the species is considered the most aggressive invasive species. On the other hand, S. canadensis is considered to be a medicinal plant. The raw material known as Herba Solidaginis includes herbs of S. canadensis, S. gigantea, and S. virgaurea. These species are known for their diuretic, anti-inflammatory, antimicrobial, antioxidant, antispasmodic properties. The purpose of our study was to analyze the chemical compounds and some biological properties of S. canadensis, growing in Slovakia, to evaluate its therapeutic potential. The total phenolic content (TPC) of the extracts from aerial parts of S. canadensis was determined by the Folin-Ciocalteu method. The evaluation of total flavonoid content (TFC) was performed by using a spectrophotometric method. The flavonoids content was expressed as rutin equivalents (mg REs) per g DW vegetal product. The phytochemical profile of S. canadensis extracts was assessed by liquid chromatography-tandem mass spectrometry (LC-MS/MS). The radical scavenging activity of samples was measured using the 2,2-diphenyl-1-picrylhydrazyl (DPPH) method. Reducing power of extracts was determined by the phosphomolybdenum method. Total phenolic contents (TPC) and total flavonoid contents (TFC) of the extracts varied from 204.19 to 293.43 mg GAE.g-1 DW, and 64.99 – 175.25 g QE.g-1 DW, respectively; the best results were obtained for ethanol extract. Some phenolic compounds were identified by HPLC with significant amounts of rutin (211.20 µg.mL-1), quercetin (122.08 µg.mL-1), quercitrin (102.50 µg.mL-1) and chlorogenic acid (147.00 µg.mL-1). The DPPH values in the inflorescences were higher than in the leaves: the antioxidant activity of leaf extracts was in the range from 5.34 to 17.16 mg TE.g-1, for inflorescences, this parameter ranged from 6.09 to 19.87 mg TE.g-1. The high total phenolic compounds and flavonoids can be used as a valuable source of phytochemicals in herbal remedies. Our study of S. canadensis, growing in Slovakia, shows the promising potential that can be evaluated as an effective antioxidant and antimicrobial agent in herbal medicines.

In vitro multiple pharmacological targets of Colutea cilicica Boiss. &amp; Balansa against key enzymes linked to neurodegenerative diseases, diabetes, and hyperpigmentation

DOI : 10.5152/IstanbulJPharm.2018.396764 Prevention and treatment of noncommunicable diseases such as neurodegenerative diseases, diabetes, and hyperpigmentation using medicinal plants has attracted increasing attention during the past few decades. In this study, Colutea cilicica Boiss. & Balansa extracts (ethyl acetate, methanol, and water) were evaluated against key enzymes involved in neurodegenerative diseases, diabetes, and hyperpigmentation. The antioxidant (free radical scavenging, reducing power, β-carotene/linoleic acid, and phosphomolybdenum) and metal chelation properties were also investigated. The methanol extracts of C. cilicica vigorously inhibited the activities of acetylcholinesterase and butyrylcholinesterase (1.33 and 0.68 mg galantamine equivalents (GALAE)/g extract, respectively). It was observed that C. cilicica extracts possessed a higher inhibitory potential for α-glucosidase (2.71–1.23 mmol acarbose equivalents (ACAE)/g extract) than that for α-amylase (0.57–0.12 mmol ACAE/g extract). The water extract of C. cilicica showed potent radical scavenging capacity against DPPH (2, 2-diphenyl-1-picrylhydrazyl) and ABTS (2,2’-azinobis(3-ethylbenzothiazoline-6-sulfonic acid) (42.46 and 57.70 mg trolox equivalents (TE)/g extract, respectively). Phytochemical determination showed that C. cilicica water extract (17.26 mg rutin equivalents (RE)/g extract) was rich in flavonoids compared with ethyl acetate and methanol extracts (2.78 and 2.83 mg RE/g extract, for the respective extracts). These findings reveal the interesting potential of C. cilicica as a valuable source of phytochemicals that can be used against common noncommunicable diseases, particularly against enzymes involved in neurodegenerative diseases.

Optimization of the microwave-assisted extraction characteristics for bioactive compounds from eggplant (Solanum melongena L.)

Eggplant is consumed worldwide as a valuable source of phytochemicals, especially anthocyanin and antioxidants. Here, microwave-assisted extraction (MAE) was applied to optimize the total yield (TY), total anthocyanin content (TAC), total phenolic content (TPC), and radical scavenging activities (DPPH, ABTS, and FRAP) of eggplant. A response surface methodology (RSM) was employed based on a five-factor, three-level central composite design with the ethanol concentration (X1) 55-95% , microwave power (X2: 0-200 W), and extraction time (X3: 30-150 s) as independent process variables. Furthermore, the efficiency of MAE was compared to that of conventional reflux extraction (CRE) in terms of target responses, energy consumption, and CO2 emissions. The highest TY (1.72%), TAC (9.55 mg CE/L), TPC (48.75 mg GAE/100 mL), and antioxidant activities (DPPH: 45.95, ABTS: 46.74, and FRAP: 69.22 mg TE/100 mL) were obtained under the optimum MAE parameters of X1: 70%, X2: 160 W, and X3: 100 s. Moreover, MAE yielded higher target responses than CRE in a faster time with lower energy consumption and CO2 emissions. In conclusion, the application of RSM to evaluate the extraction characteristics of individual components by MAE and CRE revealed MAE as an effective method for the green extraction of target compounds from eggplant.

Phenolic Content of Brown Algae (Pheophyceae) Species: Extraction, Identification, and Quantification.

Over the last few decades, isolations and chemical characterizations of secondary metabolites with proved biological activities have been of interest for numerous research groups across the world. Phenolics, as one of the largest and most widely distributed group of phytochemicals, have gained special attention due to their pharmacological activity and array of health-promoting benefits. Reports on phenolic potentials of marine algae, especially brown algae (Pheophyceae) that are characterized by the presence of phlorotannins, are still scarce. The aim of this review paper is to provide an overview of current knowledge about phenolic potential of different brown algae species (74 species from 7 different orders). Studies on brown algae phenolics usually involve few species, thus the focus of this review is to provide information about the phenolic potential of reported algae species and to get an insight into some issues related to the applied extraction procedures and determination/quantification methods to facilitate the comparison of results from different studies. The information provided through this review should be useful for the design and interpretation of studies investigating the brown algae as a source of valuable phytochemicals.

Biochemical composition and in vitro digestibility of Galdieria sulphuraria grown on spent cherry-brine liquid

The aim of this work was to valorise an industrial food by-product and to produce a microalgal biomass rich in phytochemicals at high added value for food and nutraceutical applications. The biochemical composition, in vitro digestibility and antioxidant activity of Galdieria sulphuraria biomass grown heterotrophically on standard medium (SM) and on spent Cherry-Brine Liquid (sCBL) were assessed and compared. The biomass produced in sCBL was characterized by a lower content of proteins and lipids, while showing an increase in carbohydrates and polyphenols (5.3 vs 1.6 mg g−1). The sCBL biomass lipid moiety had a lower palmitic and linoleic acid content and a higher oleic acid concentration than SM. The total protein digestibility of Galdieria grown in SM and sCBL was 79% and 63% respectively. The antioxidant activity (AA) of G. sulphuraria biomass grown in sCBL was significantly higher than that grown in SM. Studying the AA release for sCBL biomass during the digestion, the highest value was found in the intestinal phase. In conclusion, G. sulphuraria has a valuable nutritional profile and could become a valuable source of phytochemicals, depending on the cultivation media. Cultivation on sCBL would allow an environmentally and economically sustainable process, valorising the food by-product and producing a microalgal biomass rich in cherry anthocyanins with high AA released at the intestinal level.

Determination of the yield, saponin content and profile, antimicrobial and antioxidant activities of three Gypsophila species

In this study, the yield of morphological parts, the saponin content and profile, and the antimicrobial and antioxidant activities of three Gypsophila species (G. paniculata, G. pacifica, and G. scorzonerifolia) were determined. Furthermore, an effort was made to develop guidelines on general principles of cultivation and recommendations with regard to raw material harvesting.Along with plant aging, a gradual increase in the size and weight of above- and underground parts of plants of three analysed Gypsophila species was noted. Profiling of GOTCAB (Glucuronide Oleanane-type Triterpenoid Carboxylic Acid 3,28-O-Bidesmosides) saponins was carried out with the use of liquid chromatography coupled with a quadrupole-orbitrap mass spectrometer and 10 major GOTCABs were tentatively identified in the Gypsophila roots. The main prosaponins of the Gypsophila saponins were gypsogenin 3-O-glucuronide and quillaic acid 3-O-glucuronide. The content of total saponins varied from 3.4 to 48.1 mg g−1 dry root weight, with the highest value in two- and three-year-old G. scorzonerifolia and G. pacifica roots. For production of raw material with high saponin content, G. scorzonerifolia and G. pacifica roots should be recommended for harvesting after at least three years of cultivation. It was also proved that the Gypsophila raw material was characterized by antimicrobial and antioxidant properties. The hexane extracts prepared from the roots of three Gypsophila species showed higher antifungal and antimicrobial activity than the methanol ones. Furthermore, simulated gastrointestinal digestion was applied to determine the polyphenol content and antioxidant potential of the in vitro bioaccessible fraction. Overall, G. pacifica was characterized by the highest polyphenol content and antioxidant activity, both in the case of undigested and digested samples. The in vitro digestion had no significant influence on the polyphenol content in all species. However, this process resulted in a decrease in Fe3+ reducing antioxidant power to 64.6% (G. scorzonerifolia) and DPPH• scavenging activity to 59.7% (G. scorzonerifolia). Conversely, it caused an increase up to 230.2% (G. scorzonerifolia) and 159.3% (G. pacifica) of ABTS•+ and OH• scavenging activities, respectively.Therefore, the roots of the examined Gypsophila species can be considered as a valuable source of phytochemicals, especially saponins, with antimicrobial and antioxidant properties. Our findings provide a basis for developing a valuable food additive or medicines as well as raw material for chemical and hygiene industries.

Evaluation of antioxidant and antimicrobial properties of solvent extracts of agro-food by-products (cashew nut shell, coconut shell and groundnut hull)

In India, agro-food by-products such as shell cake of cashew nut (Anacardium occidentale L.), shell of coconut (Cocos nucifera L.) and hull of groundnut (Arachis hypogaea L.) are cheaply available on a vast scale. Even though a small portion of these solid waste materials is being used, a large quantity is not being utilized. Based on literature data, these by-products could be used as a source of valuable phytochemicals. The present study explored a suitable solvent system and extraction conditions for the recovery of polyphenols from three different agro-food by-products. The optimal conditions for the recovery of polyphenols from agro-food by-products were investigated in addition to evaluating their antioxidant and antibacterial properties. Among the three investigated by-products, methanolic extract of cashew nut shell was the most prominent source of antioxidants (3412.28 mg gallic acid equivalent (GAE)/L) compared to coconut shell (1056.32 mg GAE/L) and groundnut hull (426.35 mg GAE/L). The in vitro antioxidant assay produced promising radical scavenging activity of shell extract of coconut (concentration at which the response was reduced by half; IC50 = 12 μg/mL) compared to cashew nut (IC50 = 44 μg/mL) and groundnut hull extract (IC50 = 48 μg/mL). The anti-bacterial activity of different solvent extracts revealed that the methanolic extracts from cashew nut and coconut shells were more effective in inhibiting the growth of both Gram-positive and Gram-negative bacteria. The present work revealed the possibility of recovery of useful phytochemical compounds from agro-food byproducts which could be used subsequently as natural food preservatives.