Characterization of non polar-polar solvent extracts from some tea plantation shade tree leaves with special reference to antioxidant and antibacterial activities

2020 ◽  
pp. 15-21
Author(s):  
Arindam Ghosh ◽  
Soumya Majumder ◽  
Sumedha Saha ◽  
Malay Bhattacharya
Keyword(s):  
Cardiac Glycosides ◽  
Polar Solvent ◽  
Reducing Power ◽  
Scavenging Activity ◽  
Shade Trees ◽  
Crude Fibre ◽  
Shade Tree ◽  
Dpph Scavenging Activity ◽  
Dpph Scavenging

Beneficial properties of shade trees of tea plantations other than their medicinal properties have been extensively studied. This research was initiated to explore the properties of some shade trees with special emphasis on their antioxidant and antibacterial properties. Leaves from shade tree like Dalbergia sissoo (DS), Cassia siamea (CS), Derris robusta (DR), Leucaena leucocephala (LL), Acacia lenticularis (AL) and Melia azedarach (MA) were used for the study. Characterization of shade tree leaves by determination of moisture, crude fibre and ash content and tests of non polar – polar solvent extracts for steroid, tannins, cardiac glycosides and coumarin, free radical scavenging, ferric reducing power, NO scavenging activities, quantification of Flavonoids and antibacterial activity were conducted. The average moisture, crude fibre and ash percentage of shade tree plants were found to be 62.95, 11.28 and 1.86 respectively. Methanol, ethanol, acetone and ethyl acetate respectively proved to be the most potent solvent for various phytochemical extractions as it gave positive results for tests like tannin, steroid, cardiac glycosides and coumarin. AL (91.46%), DR (92.69%), LL (94.32%) and MA (93.34%) leaf extracts showed a high level of DPPH scavenging activity in their water extracts. In DS (88.11%) and CS (83.23%) maximum DPPH scavenging activity was observed in Diethyl ether and Methanol extracts respectively.  Acetone extracts were more active than the water extracts in exhibiting ferric reducing power and NO scavenging activity. Summation of the quantity revealed that DS showed maximum presence of flavonoids and acetone as most potential for isolation of flavonoids. The decreasing order of summative antibacterial activity was recorded in DS, followed by CS, DR, AL, MA and LL. Chloroform showed the highest summative inhibition zone followed by ethanol, ethyl acetate, diethyl ether, acetone, water,  hexane, benzene and methanol. The antioxidant and antibacterial potential of shade trees were established.

scholarly journals PHYTOCHEMICAL IDENTIFICATION AND ANTIOXIDANT ACTIVITY OF PASSIFLORA FOETIDA FRUITS AND LEAVES EXTRACTS: A COMPARATIVE STUDY

2020 ◽  
pp. 55-58 ◽  
Author(s):  
YOHANES TANDORO ◽  
PAINI SRI WIDYAWATI ◽  
TARSISIUS DWI WIBAWA BUDIANTA ◽  
GRACE SUMARGO
Keyword(s):  
Antioxidant Activity ◽  
Cardiac Glycosides ◽  
Reducing Power ◽  
Total Phenol ◽  
Total Flavonoids ◽  
Scavenging Activity ◽  
Phytochemical Compounds ◽  
Dpph Scavenging Activity ◽  
Passiflora Foetida ◽  
Dpph Scavenging

Objective: The objective of this study was to compare the phytochemical composition and antioxidant activity of Passiflora foetida fruits and leaves extract. Methods: The parameters observed in this study were phytochemical compounds including alkaloid, flavonoid, phenolic, sterol, triterpenoid, saponin, tannin, and cardiac glycoside, total phenolic content Folin Ciocalteu method is based on reduction of Folin Ciocalteu reagent in alkaline medium; the metal complex produced measured at λmax: 760 nm; total flavonoids content with AlCl3 Colorimetric method based on complex formation of AlCl3 and flavonoid content in alkaline medium, the AlCl3-flavonoid complex produced measured at λmax: 510 nm; free radical DPPH scavenging activity; and ferric reducing power based on reduction of Fe3+ion into Fe2+ion that reacted with FeCl3 to form a ferric-ferrous complex that measured at λmax: 700 nm. Results: Passiflora leaves extract has phytochemical compound such as alkaloids, phenolics, flavonoids, saponins, and cardiac glycosides, total phenol was 22.92±0.18 mg GAE/g sample dry base, total flavonoid was 7.01±0.10 mg CE/g sample dry base, DPPH scavenging activity was 2.77±0.02 mg GAE/g sample dry base and ferric reducing power was 3.20±0.04 mg GAE/g sample dry base meanwhile Passiflora fruits extract had phytochemical compounds such as alkaloid, phenolic, flavonoids, cardiac glycosides, total phenol was 6.53±1.02 mg GAE/g sample dry base, total flavonoids were 1.56±0.27 mg CE/g sample dry base, DPPH free radical scavenging activity was 1.00±0.15 mg GAE/g sample dry base, and ferric reducing power was 1.12±0.17 mg GAE/g sample dry base. Conclusion: Passiflora leaves extract has higher total phenol, total flavonoid and antioxidant activity measured by DPPH scavenging activity and ferric reducing power value compared with Passiflora fruits extract.

scholarly journals Ganoderma lucidum Metanolik Ekstraktının Fitotoksik Etkilerinin ve Antioksidan Potansiyelinin Araştırılması

2016 ◽  
Vol 4 (3) ◽  
pp. 163 ◽  
Author(s):  
Fuat Bozok ◽  
Tülin Eker ◽  
Gökhan Sezer ◽  
Adnan Bozdoğan ◽  
Hasan Hüseyin Doğan ◽  
...  
Keyword(s):  
Nitric Oxide ◽  
Ganoderma Lucidum ◽  
Methanolic Extract ◽  
Antioxidant Activities ◽  
Reducing Power ◽  
Scavenging Activity ◽  
Phytotoxic Effect ◽  
Dpph Scavenging Activity ◽  
Allelopathic Effects ◽  
Dpph Scavenging

The aim of this study is to reveal allelopathic effects and antioxidant activities of methanolic extract of Ganoderma lucidum in Zorkun plateau (Osmaniye). It was determined that methanolic extract of G. lucidum has significantly phytotoxic effect by increasing the doses (1, 2, 4, 8 mg/mL) on Hordeum vulgare and Triticum aestivum. Total phenol and flavonoid amounts of G. lucidum were 114.55 mg/kg and 8.95 mg/kg, respectively. 2,2-diphenyl-1-picrylhydrazyl (DPPH), scavenging activity (60%, 91% and 92%), reducing power (0.83, 1.43 and 2.23 Abs), and nitric oxide (NO) scavenging activity (48%, 55% and 70%) of this mushroom at the different concentrations (1.25, 2.5 and 5 mg/mL) were determined, respectively. However, H2O2 scavenging activity of the different concentrations (0.0156-0.125 mg/mL) was found as 18%, 56%, 60% and 86%, respectively. Based on these findings, it can suggest that G. lucidum methanolic extract has significantly phytotoxic effect and antioxidant activity. The present study is the first report on the phytotoxic effects and antioxidant activities of G. lucidum which consumed and collected from Amanos Mountains.

scholarly journals IN VITRO ANTIOXIDANT CAPACITIES AND ANTIDIABETIC PROPERTIES OF PLUCHEA LEAVES AND GREEN TEA MIXTURES AT VARIOUS PROPORTIONS

2017 ◽  
Vol 9 (8) ◽  
pp. 203 ◽  
Author(s):  
Paini Sri Widyawati ◽  
Yesiana D. W. Werdani ◽  
Christine Setiokusumo
Keyword(s):  
Free Radical ◽  
Green Tea ◽  
Reducing Power ◽  
Alpha Amylase ◽  
Scavenging Activity ◽  
Inhibition Activity ◽  
Graph Pattern ◽  
Phytochemical Compounds ◽  
Dpph Scavenging Activity ◽  
Dpph Scavenging

Objective: This study was done to determine the effect of pluchea leaves and green tea mixtures at various proportions to antioxidant and antidiabetic properties.Methods: The research used a single factor randomized block design. Research factors were pluchea and green tea mixture proportions, including 100:0; 75:25; 50:50; 25:75; and 0:100% (w/w), respectively. Each of factors was repeated five times. The parameters observed in this study were phytochemical compounds, total phenols, total flavonoids, free radical DPPH scavenging activity, iron ion reducing power, alpha amylase and alpha glycosidase inhibition activities. The data were statistically α = 5%, if the data analysis showed a significant analyzed using analysis of variance (ANOVA) at effect then it was continued with duncan's multiple range test (DMRT).Results: The phytochemical compounds containing in pluchea leaves and green tea mixtures were alkaloids, flavonoids, phenolics, saponins, tannins, triterpenoids, sterols, and cardiac glycosides. The qualitative assay of phytochemical compounds from aqueous extract had a different pattern with total phenolic content (TPC) and total flavonoid content (TFC), especially at 75:25; 50:50 and 25:75 % (w/w) from pluchea leaves and green tea mixture proportions. The 50:50% (w/w) proportions of samples had the highest TPC and TFC, it was proposed that there was an interaction between bioactive compounds of pluchea leaves and green tea. TPC and TFC were correlated with free radical DPPH scavenging activity, iron reducing power and alpha glycosidase inhibition activity, but the alpha amylase inhibition activity had the different graph pattern with the TPC and TFC.Conclusion: The antioxidant capacity of pluchea leaves and green tea mixtures at various proportions had the graph pattern similar to the alpha glycosidase inhibitory activity and different with the alpha amylase inhibitory activity.

Preparation and characterization of phloretin by complexation with cyclodextrins

2020 ◽  
Vol 44 (14) ◽  
pp. 5218-5223
Author(s):  
Xiaona Hu ◽  
Ziruo Zhou ◽  
Lijun Han ◽  
Shujing Li ◽  
Wei Zhou
Keyword(s):  
Antioxidant Activity ◽  
Inclusion Complexes ◽  
Scavenging Activity ◽  
Dpph Scavenging Activity ◽  
Dpph Scavenging

RP and DPPH scavenging activity tests revealed that the antioxidant activity of phloretin improved after the formation of inclusion complexes.

scholarly journals A Study on Organic Tomatoes: Effect of a Biostimulator on Phytochemical and Antioxidant Activities

2017 ◽  
Vol 2017 ◽  
pp. 1-8 ◽  
Author(s):  
Varinder Sidhu ◽  
Dilip Nandwani ◽  
Li Wang ◽  
Ying Wu
Keyword(s):  
Antioxidant Activities ◽  
Radical Scavenging Activity ◽  
Radical Scavenging ◽  
Reducing Power ◽  
Total Phenolic ◽  
Scavenging Activity ◽  
Treatment Groups ◽  
Significant Difference ◽  
Dpph Scavenging Activity ◽  
Dpph Scavenging

The objective of the present study is to investigate nutritional and antioxidant activity of four types of organic tomato cultivars. The differences in tomato quality are also tested between groups with or without treatment using an organic biostimulator, Stimplex. Total phenolic compounds (TPC), lycopene,β-carotene, DPPH free radical scavenging activity, reducing power, and color parameters were investigated in the current study. The results showed that there was no significant difference in TPC among cultivars regardless of Stimplex treatment. Higher lycopene andβ-carotene were obtained in Stimplex treated tomatoes. Lycopene andβ-carotene contents were significantly different among cultivars (P<0.05). DPPH scavenging activity in controlled group was significantly higher than that in the Stimplex treated tomatoes (P<0.05). No significant difference in reducing power was detected among cultivars treatment groups. The study showed that the darker the tomato color, the higher the lycopene andβ-carotene contents and the stronger the reducing power.

scholarly journals PHYTO-CHEMICAL AND NUTRITIONAL PROFILING OF TENDU FRUIT (DIOSPYROS MELANOXYLON ROXB.) AND EVALUATION OF ITS SHELF STABILITY

2021 ◽  
Vol 21 (No 1) ◽  
Author(s):  
Zeba Jamil ◽  
Ashish M. Mohite ◽  
Neha Sharma
Keyword(s):  
Radical Scavenging Activity ◽  
Radical Scavenging ◽  
Reducing Power ◽  
Proximate Analysis ◽  
Scavenging Activity ◽  
Crude Fibre ◽  
Shelf Stability ◽  
Reducing Power Assay ◽  
Dpph Scavenging ◽  
Nutritional Profiling

Tendu fruit is one of the important forest fruit found in major part of India. Originally, plant is well known for its leaves as Bidipatta for making bidi in tribal areas of India. Since, the tendu fruit supposedly have very short shelf-life, therefore, the present study has been undertaken to evaluate the shelf stability as well as the nutritional and phytochemical potential of the fruit.The complete proximate analysis including the mineral and vitamin profiling of the pulp, skin and seeds were done. The fruit pulp was found to be especially rich in calcium, magnesium, sodium, potassium, phosphorous, thiamine, riboflavin, niacin and vitamin C, with potassium being as high as 305.52±8.94 mg/100 gm (wet basis) . The fruit skin was found to have high amounts of crude fibre, potassium, calcium, phosphorous& magnesium, whereas for seeds, the values of protein, crude fibre and oil were 7.02±0.53 % 25.13±0.41 and 5.54±0.07 % respectively. The storage stability of the fresh fruit was found to be 5 days at 25°C and 65 % R.H. During storage, pH of fruit reduced drastically with an increase in acidity value from 0.12±0.00% to 2.09±0.01 %. The reading of Browning index (A420nm) also gradually increased from 0.2257 to 0.4766. The DPPH scavenging activity, Hydrogen peroxide scavenging activity,Hydroxyl radical scavenging activity, and Reducing power assay of fruits were observed to be very high. Gallic acid and Tannic acid content in fruits was reported as 28.43% and25.74 % respectively on dry basis.

Chemical Constituents Isolated from Rhododendron ungernii with Antioxidant Profile

2019 ◽  
Vol 9 (3) ◽  
pp. 238-243 ◽  
Author(s):  
Emine Dede ◽  
Nusret Genc ◽  
Mahfuz Elmastas ◽  
Huseyin Aksit ◽  
Ramazan Erenler
Keyword(s):  
Antioxidant Activities ◽  
Biological Activities ◽  
Chemical Constituents ◽  
Reducing Power ◽  
Scavenging Activity ◽  
Isolation And Identification ◽  
Reduced Pressure ◽  
Scavenging Effect ◽  
Pharmaceutical Industries ◽  
Dpph Scavenging

Background: Plant in Rhododendron genus that contains phenolic compounds has been used in traditional medicine and revealed considerable biological activities. Objective: Isolation and identification of antioxidant natural products from Rhododendron ungernii. Methods: Rhododendron ungernii Trautv. flowers were collected and dried in shade. The dried flowers were extracted with methanol for 3 days. The solvent was removed by reduced pressure to yield the extract which was subjected to column chromatography (Sephadex LH-20, C18 reversed phase column) to isolate catechin-7-O-glucoside (1), quercetin-3-O-β-galactoside (2), quercetin-3-O- β-xyloside (3), farrerol (4), myricetin (5), and quercetin (6). The structures of isolated compounds were elucidated by spectroscopic methods such as 1D-NMR, 2D-NMR, and LC-TOF/MS. DPPH scavenging effect, ABTS+ scavenging activity, and reducing power (FRAP) were performed for antioxidant assays of isolated natural compounds. Results: Isolated flavonoids displayed the outstanding antioxidant activities. Catechin-7-O-glucoside (1) and quercetin-3-O-β-galactoside (2) (IC50, 3.66 µg/mL) had the most DPPH• scavenging effect among the compounds. The highest ABTS•+ scavenging activity (IC50, 1.41 µg/mL) and reducing power effect (6.05 mmol TE/g comp) were observed for myricetin (5). Conclusion: R. ungernii extract and isolated compounds could be a promising antioxidant for food and pharmaceutical industries.

scholarly journals Stem Lettuce and Its Metabolites: Does the Variety Make Any Difference?

Foods ◽  
2020 ◽  
Vol 10 (1) ◽  
pp. 59
Author(s):  
Janusz Malarz ◽  
Klaudia Michalska ◽  
Anna Stojakowska
Keyword(s):  
Chemical Composition ◽  
Plant Material ◽  
Methanolic Extract ◽  
Sesquiterpene Lactones ◽  
Scavenging Activity ◽  
Nmr Analysis ◽  
Caffeic Acid Derivatives ◽  
Aerial Parts ◽  
Dpph Scavenging Activity ◽  
Dpph Scavenging

The objective of the present study was to characterize chemical composition of hitherto unexamined aerial parts of Lactuca sativa var. angustana cv. Grüner Stern. In contrast to leafy and head varieties of the lettuces, asparagus lettuce grown in Europe is much less studied. Fractionation of a methanolic extract from leaves of L. sativa cv. Grüner Stern, supported with HPLC/DAD and 1H NMR analysis, led to the isolation and/or identification of numerous terpenoid and phenolic compounds, including five apocarotenoids—(-)-loliolide, (+)-dehydrovomifoliol, blumenol A, (6S,9S)-vomifoliol, and corchoionoside C; three sesquiterpene lactones; two lignans—((+)-syringaresinol and its 4-O-β-glucoside); five caffeic acid derivatives; and three flavonoids. Some of the compounds, to the best of our knowledge, have never been isolated from L. sativa before. Moreover, monolignols, phenolic acids and a tryptophan-derived alkaloid were found in the analyzed plant material. Stems, leaves and shoot tips of the asparagus lettuce were examined to assess their phenolics and sesquiterpene lactone content as well as DPPH scavenging activity. Another stem lettuce—L. sativa var. angustana cv. Karola, two cultivars of leafy lettuces and one species of wild lettuce—L. serriola, were also examined as a reference material using HPLC/DAD. The results have been discussed regarding our previous studies and the literature data available.

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