scholarly journals Anti-oxidant activity, alpha-amylase inhibition and toxicity of leaf extracts of cultivated Rapanea melanophloeos (L.) Mez (cape beech)

2019 ◽  
Vol 126 ◽  
pp. 261-264
Author(s):  
N. Lotter ◽  
E. Chivandi ◽  
B.W. Lembede ◽  
A.R. Ndhlala ◽  
T.T. Nyakudya ◽  
...  
Keyword(s):  
Alpha Amylase ◽  
Leaf Extracts ◽  
Anti Oxidant ◽  
Rapanea Melanophloeos

Increase in Anti-Oxidant Components and Reduction of Off-Flavors on Radish Leaf Extracts by Extrusion Process

2016 ◽  
Vol 45 (12) ◽  
pp. 1769-1775 ◽  
Author(s):  
Nak-Yun Sung ◽  
Woo-Young Park ◽  
Yi-Eun Kim ◽  
Eun-Ji Cho ◽  
Hayeon Song ◽  
...  
Keyword(s):  
Extrusion Process ◽  
Leaf Extracts ◽  
Off Flavors ◽  
Anti Oxidant

scholarly journals Phytochemical analysis, anti-oxidant and anti-microbial activity of Acalypha indica leaf extracts in different organic solvents

2016 ◽  
Vol 8 (3) ◽  
pp. 444 ◽  
Author(s):  
Chekuri Sudhakar ◽  
Narendar Vankudothu ◽  
Shivaprasad Panjala ◽  
Nirmala Babu Rao ◽  
Roja Rani Anupalli
Keyword(s):  
Ethyl Acetate ◽  
Petroleum Ether ◽  
Microbial Activity ◽  
Leaf Extract ◽  
Antioxidant Properties ◽  
Soxhlet Extraction ◽  
Phytochemical Analysis ◽  
Leaf Extracts ◽  
Anti Oxidant ◽  
Acalypha Indica

The herb <em>Acalypha indica </em>which belongs to Euphorbiaceae family has multiple medicinal properties which include anti-oxidant, anti-bacterial, anti-fungal, anti-inflammatory, antiulcer, anti-helmintic, anti-cancerous, anti-venom, and neuro-protective activity. The present study was designed to evaluate the phytochemical, antimicrobial and anti-oxidant activity of <em>Acalypha indica </em>leaves extracts in different solvent extractions like methanol, hexane, ethyl acetate and petroleum ether. Fresh leaves of the plant were collected and shade dried. Dried leaves were milled to obtain powder. Powder was subjected to soxhlet extraction using solvents and extracts were successively obtained. Phytochemical analysis was conducted following standard methods.  Phytochemical analysis showed the presence of Alkaloids, Phenols, Saponins, Flavanoids and Amino acids. Leaf extract of methonal have shown the highest anti-oxidation capacity than hexane, ethyl acetate and petroleum ether. Anti-microbial activity has been performed on microbes like <em>Bacillus sps</em>, <em>E.coli,</em> <em>Psuedomonas sps</em> and <em>Streptococcus sps.</em> A highest value of zone of inhibition was found in methanol extract against <em>E.coli.</em> These results provide evidence that <em>Acalypha indica </em>leaf extract possesses vital phytochemicals, antimicrobial and antioxidant properties. Hence this plant can be studied further for drug analysis for finding potent medicines for diseases.

In vitro antioxidant activity and phytochemical analyses of Acalypha godseffiana (Euphobiaceae) leaf extracts

2021 ◽  
Vol 25 (1) ◽  
pp. 75-79
Author(s):  
S.O. Olubodun ◽  
G.E. Eriyamremu ◽  
M.E. Ayevbuomwan ◽  
C.I. Nzoputa
Keyword(s):  
Antioxidant Activities ◽  
Radical Scavenging Activity ◽  
Antioxidant Properties ◽  
Radical Scavenging ◽  
Antioxidant Vitamin ◽  
Phytochemical Analysis ◽  
Leaf Extracts ◽  
Anti Oxidant ◽  
In Vitro Antioxidant Activity

The presence of various bioactive components makes it necessary to analyse plants for their potential to act as a source of useful treatments and cures for many inflammatory, infectious and pathogenic diseases. This study was carried out to determine phytochemicals and in-vitro antioxidant activities of the leaf extracts of Acalypha godseffiana. The leaves of A. godseffiana were collected, dried, pulverized and extracted separately with methanol and water using maceration method. The extract was concentrated in vacuo with rotary evaporator at 40oC. The extracts were subjected to quantitative phytochemical analysis and different anti-oxidant analytical procedures like FRAP, DPPH etc to determine the radical scavenging capabilities. The results of phytochemical analysis estimated the quantities and revealed the presence of alkaloids, flavonoids, tannins, saponins and terpenoids which varied in both extracts. The methanol and aqueous extracts exhibited antioxidant activities with relatively high IC50 (IC50 = 3.67 ìg/ml and 4.42ìg/ml respectively) which accounted for a low free radical-scavenging activity when compared with the reference antioxidant, vitamin C (IC50 = 1.51ìg/ml). The results of the study indicates that A. godseffiana leaf extracts contain secondary metabolites and possesses antioxidant properties.

EFFECT OF COMBINATION OF TWO PLANTS ON ANTI-OXIDANT ACTIVITY

2019 ◽  
Vol 8 (6) ◽  
Author(s):  
Deepa Jose ◽  
Prasanth B ◽  
Sini Baby
Keyword(s):  
Antioxidant Activity ◽  
Radical Scavenging ◽  
Psidium Guajava ◽  
Free Radical Scavenging ◽  
Syzygium Cumini ◽  
Leaf Extracts ◽  
Superoxide Free Radical ◽  
Anti Oxidant ◽  
Free Radical Scavenging Assay ◽  
Radical Scavenging Assay

Anti-oxidants are essential for maintaining optimum health and well being by acting against damage caused by free radicals. Regular consumption of vegetables and fruits with anti-oxidant activity can reduce the risk of many chronic diseases. The main objective of the study was to evaluate the antioxidant activity of  Psidium guajava and Syzygium cumini leaves individually and as a combination of ethanolic leaf extracts of both in 1:1 ratio. The antioxidant activity of ethanolic leaf extracts of Syzygium cumini and Psidium guajava and its 1:1 combination were determined by different methods such as Superoxide free radical scavenging assay, Hydrogen peroxide scavenging assay and Hydroxyl radical scavenging assay.The 1:1 combination of ethanolic leaf extract of Syzygium cumini and Psidium guajava showed higher antioxidant activity than the individual extracts. Out of the two individual extracts, Syzyium cumini showed more activity than the Psidium guajava extract. A dose dependent increase in activity was found in all methods. The percentage inhibition of combined extract by hydroxyl radical scavenging assay and hydrogen peroxide scavenging assay was 72.70 and 76.15 respectively. Superoxide free radical scavenging assay, showed inhibition of 63.5percentage.From the result it is concluded that leaves of both the plants possess anti-oxidant activity and Syzygium cumini exhibited more activity than Psidium guajava. But the combination of both is superior to individual extracts in exhibiting anti-oxidant activity. The results showed the possibility of synergistic or additive effect of combination of ethanolic extracts of Syzygium cumini and Psidium guajava leaves in the ratio 1:1.

Ethnobotanical survey, phytoconstituents and antibacterial investigation of Rapanea melanophloeos (L.) Mez. bark, fruit and leaf extracts

2021 ◽  
Vol 0 (0) ◽  
Author(s):  
Thabile Lukhele ◽  
Denise Olivier ◽  
Marthe C. D. Fotsing ◽  
Charlotte M. Tata ◽  
Monisola I. Ikhile ◽  
...  
Keyword(s):  
Amino Acids ◽  
Antibacterial Activity ◽  
Essential Amino Acids ◽  
Antibacterial Activities ◽  
Ethnobotanical Survey ◽  
Leaf Extracts ◽  
Gram Positive ◽  
Plant Parts ◽  
Gastro Intestinal Tract ◽  
Rapanea Melanophloeos

Abstract Rapanea melanophloeos is traditionally used in South Africa in the treatment of ailments of the skin, pulmonary and gastro intestinal tract. This study was aimed at giving an overview of these traditional uses and comparing the phytochemicals and antibacterial activities of various crude extracts of the leaves, fruits and bark in order to validate these uses. The three plant parts were extracted using petroleum ether (PE), ethyl acetate (EtOAc), methanol (MeOH) and water. Various phytochemicals were compared using TLC, while alcohol precipitable solids (APS), non-polar terpenes and amino acids were analysed by GC-MS. Antibacterial activity was determined against three Gram-positive and three Gram-negative strains by microdilution assays. Caryophyllene oxides, α-cadinol and (−)-spathulenol were identified in the PE extracts. All nine essential amino acids were present in fruit extracts in significantly higher levels than in the leaves and bark; 255.1, 23.4 and 21.3 mg/g respectively. Most of the extracts showed good antibacterial activity, especially against the Gram-positive pathogens (MIC of ≤1 mg/mL), the EtOAc extracts exhibited the best activity with the fruit having an MIC values of 0.1 ± 0.2 mg/mL against Staphylococcus epidermidis and Enterococcus faecalis, 0.05 mg/mL against Bacillus cereus. Results from this study validate the ethnomedicinal uses of R. melanophloeos extracts for ailments of bacterial etiology. The plant had a rich supply of secondary metabolites, APS and amino acids and TLC and antibacterial activities of the extracts showed slight variations in chemical composition due to geographic distribution.

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