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... The activity concentrations of naturally occurring radionuclides ²¹⁰Po and ²¹⁰Pb were estimated in some selected medicinal plants and soil samples of coastal Karnataka in India. The mean activity concentrations of ²¹⁰Po and ²¹⁰Pb varied in the range of 4.7–42.9 Bq kg⁻¹ (dry weight) and 36.1–124 Bq kg⁻¹ (dry weight) in the soil samples, and 3.3–63.7 Bq kg⁻¹ (dry weight) and 12.0–406 Bq kg⁻¹ (dry we ...
... Leaf essential oil of Coleus aromaticus (Lamiaceae) from Cambodia was steam-distilled and investigated for its percentage composition and antibacterial activity against fifteen oral microflora pathogen strains. The volatile oil sample investigated in this work contained mainly thymol (57.4%), carvacrol (13.5%), g-terpinene (5.6%), and p-cymene (5.2%). The in vitro antibacterial experiments reveale ...
... In this present study, the antibacterial activity and the chemical composition of essential oils from the leaves of ten aromatic plants growing in the Philippines were determined. Essential oils were isolated by steam distillation and their antibacterial activities against the gram-positive bacteria (S. aureus, S. epidermidis and E. faecalis) and gram-negative bacteria (P. aeruginosa and E. coli) ...
... This article describes free radical-scavenging activities of extracts of several plants harvested in Sri Lanka through the 1,1-diphenyl-2-picrylhydrazyl (DPPH) assay. These plants have traditionally been used in the indigenous systems of medicine in Sri Lanka, such as Ayurveda, as described below. (English name, “local name in Sri Lanka,” (scientific name)).bougainvillea plant, “bouganvilla,” (Bou ...
... Essential oil of Indian borage has different activities such as anti-bacterial and anti-malarial. Salinity stress has harmful effects on the productivity of aromatic plants. This study aimed decrease the harmful effect of sodium chloride (NaCl) on Indian borage plants by adapting them to salinity stress through the use of arginine. Plants were exposed to NaCl (0, 2 and 4 g/L) and/or arginine (0, 1 ...
... Different plant extracts were screened for their potential antifungal activity against Fusarium chlamydosporum causing root rot of Coleus amboinicus and Coleus forskohlii; the aqueous and 50% ethanol extract of Annona squamosa, Azadircta indica, Eucalyptus Spp., Ocimum sanctum, Lawsonia inermis, Allium schoenoprasum, Cinnamomum verum Zingiber officinale, Piper nigrum, Calendula officinalis species ...
Leucas; Plectranthus amboinicus; hot water treatment; luminescence; nanogold; nanosilver; pH; particle size; protocols; temperature; wavelengths
Abstract:
... Biogenic synthesis of noble metal nanoparticles is an alluring alternative to other chemical methods employing conventional reducing and capping agents. Herein, a completely green protocol is projected for the synthesis of noble metal nanoparticles using the recent entry of the nanocarbon family, carbon nanodots (CDs). Spherical CDs of size less than 5 nm were synthesized from the leaves of two he ...
... Carvacrol (5-isopropyl-2-methylphenol) is the major component of Plectranthus amboinicus. Several studies have shown that carvacrol has antibacterial, antifungal and insecticidal effects, but the mechanisms that govern these processes are unclear. Reactive oxygen species (ROS) play a major role in host defence eradication of microorganisms. In this study, we provide evidence that carvacrol has pri ...
Escherichia coli; Plectranthus amboinicus; Staphylococcus aureus; agar; antibacterial properties; camphor; carene; carvacrol; chemical composition; essential oils; gas chromatography; gels; leaves; mass spectrometry; minimum inhibitory concentration; oils; Comoros
Abstract:
... The essential oil was isolated by hydrodistillation of Plectranthus amboinicus (Lour) Spring. dried leaves from Archipelago of Comoros. The oil was analyzed by capillary GC and GC-MS. Carvacrol (23.0 %), camphor (22.2 %), Δ-3-carene (15.0 %), λ-terpinene (8.4 %), O-cymene (7.7 %) and α-terpinene (4.8 %) were the major constituents of the oil. The antibacterial activity of P. amboinicus (Lour.) Spr ...
... Pimenta dioica (L.) Merr. is a popular seasoning species. During its production, there are losses of up to 50% due to anthracnose caused by fungi of the genus Colletotrichum. In this study, we evaluated the effect of ethanolic extracts on the in vitro and in vivo control of isolated Colletotrichum spp. Allspice. Extracts of leaves of P. dioica, Piper auritum, Plectranthus amboinicus and Psidium gu ...
... Essential oils (EOs) hold tremendous medicinal attributes and are greatly exploited industrially worldwide. In the present study, the chemical composition of five EOs prepared from four aromatic plants were revealed together with their inhibitory activities against five key clinical enzymes (α-amylase, α-glucosidase, tyrosinase, acetyl- and butyryl-cholinesterase). Limonene (84.3%) and sabinene (3 ...
Plectranthus amboinicus; antineoplastic agents; apoptosis; breast neoplasms; breasts; cancer therapy; caspase-3; caspase-7; cell lines; chemical composition; cytotoxicity; fluorescence microscopy; hexane; histology; kidneys; leaves; liver; mortality; neoplasm cells; phenol; pollution; research
Abstract:
... Cancer is a universal health issue, and many anticancer therapeutic drugs have been isolated from natural products. This study analyzed the cytotoxic and apoptotic activity of Plectranthus amboinicus leaf hexane (PALH) extract in MDA-MB-231 (median inhibitory concentration [IC₅₀] = 39.26 μg/mL) and MCF7 (IC₅₀ = 89.05 μg/mL) breast cancer cell lines. Cells appeared rounded and shrunken, indicating ...
... This article describes the inhibitory effects of extracts from 25 plants harvested in Sri Lanka against tyrosinase and collagenase. Inhibitors of these enzymes are common ingredients in cosmetics and medications, which help protect the skin against hyperpigmentation and premature aging. The article also discusses the polyphenol content of the extracts, which is well known to possess antioxidant pr ...
Ana Flávia Freitas de Carvalho; Vanessa Ferreira Caldeira; Ana Paula Oliveira; Joyce Kelly Marinheiro da Cunha Gonsalves; Edigênia Cavalcante Da Cruz Araújo
Candida; Gram-negative bacteria; Plectranthus amboinicus; carvacrol; disk diffusion antimicrobial test; electron microscopy; essential oils; guar gum; hydrogen; methylcellulose; nuclear magnetic resonance spectroscopy; viability
Abstract:
... From a design of experiments (DOE) performed under four independent variables, with the filmogenicity conditions and shortest disintegration time as the answers, a new oral disintegrating film (ODF) based on hydroxypropyl methylcellulose (HPMC) and guar gum (GG) with the essential oil of Plectranthus amboinicus L. (EOPA) was developed. Sixteen formulations were tested for filmogenicity, homogeneit ...
... BACKGROUND: Methane production and fatty acids (FA) biohydrogenation in the rumen are two main constraints in ruminant production causing environmental burden and reducing food product quality. Rumen functions can be modulated by the biologically active compounds (BACs) of plant origins as shown in several studies e.g. reduction in methane emission, modulation of FA composition with positive impac ...
... Plectranthus amboinicus (lour) Spreng is the herbal species belongs to the family of Lamiaceae. The leaves of this species contain Thymol which is the main bioactive compound that has anti-inflammatory, antibacterial, antifungal and antioxidant properties. In this study, oven dryer has been chosen due to its easy handling and simple operation. The Plectranthus amboinicus leaves were dried under di ...
... Heavy metal toxicity and drought stresses are two growing concerns of the global population as these have a disastrous effect on the agriculture sector, creating oxidative stress in plants and leads to deleterious effects, which end up causing a major decline in yield. Hence, carving out the best candidate for combating both these stresses have become the prime objective of researchers. Plectranth ...
Sâmia Torres Silva; Suzan Kelly Vilela Bertolucci; Samuel Henrique Braga da Cunha; Luiz Eduardo Santos Lazzarini; Marília Claudiano Tavares; José Eduardo Brasil Pereira Pinto
... The aim of the current study is to investigate the influence of light intensity, quality of light and alternative membrane sytems on the growth and headspace-GC/MS chemical analysis of Plectranthus amboinicus cultivated in vitro. Nodal segments were grown under light intensities (26, 51, 69, 94 and 130 µmol m⁻² s⁻¹) provided by cool-white fluorescent lamps. Apical segments were grown under light-e ...
... Eltivitasari A, Rahmawati, Gemantari BM, Romadhonsyah F, Nurrochmad A, Wahyuono S, Astuti P. 2021. Effect of light exposure on secondary metabolites production of an endophytic fungus Arthrinium rasikravindrae and its antioxidant and anticancer activities. Biodiversitas 22: 3156-3163. Endophytic microorganisms are one of the promising sources in producing bioactive compounds, to be developed for n ...
Thially Braga Gonçalves; Milena Aguiar Braga; Francisco F.M. de Oliveira; Gilvandete M.P. Santiago; Cibele B.M. Carvalho; Paula Brito e Cabral; Thiago de Melo Santiago; Jeanlex S. Sousa; Eduardo Bedê Barros; Ronaldo Ferreira do Nascimento; Aparecida T. Nagao-Dias
... We evaluated the antimicrobial activity and some mechanisms used by subinhibitory and inhibitory concentrations of the essential oil, obtained from leaves of Plectranthus amboinicus, against a standard strain of Klebsiella pneumoniae and 5 multiresistant clinical isolates of the bacteria. The minimal inhibitory concentration (MIC) and minimal bactericidal concentration (MBC), the rate of kill and ...