objective(s):   the ongoing increasing antibiotic resistance is one of the biggest challenges faced by global public health. the perennial need for new antimicrobials against a background of increasing antibiotic resistance in pathogenic and opportunistic microorganisms obliges the scientific community to constantly develop new drugs and antimicrobial agents. lichens are known prolific sources ...

The sensitivity of two Gram positive (Staphylococcus aureus and Bacillus subtilis) and two Gram negative (Escherichia coli and Pseudomonas aeruginosa) pathogenic multi-drug resistant bacteria was tested against the crude extracts (cold aqueous, hot aqueous, and methanol extracts) of leaves and seeds of Argemone mexicana L. (Papaveraceae) by agar well diffusion method. Though all the extracts we...

Eighty-seven methanol extracts of medicinal plants, most of them are currently used in Vietnamese oriental medicine, were screened for NF-κB inhibitory activity. Seven methanol extracts showed strong to moderate inhibitory activity. These include the extracts of Crinum latifolium (leaves), Evodia rutaecarpa (fruits), Polygonum cuspidatum (rhizoma), Perilla ocymoides (leaves), Rubia cordifolia (...

Extracts prepared from seeds of Manilkara zapota, Anona squamosa, and Tamarindus indica were screened for their antibacterial activity by disc diffusion and broth dilution methods. Acetone and methanol extracts of T. indica seeds were found active against both gram-positive and gram-negative organisms. MIC values of potent extracts against susceptible organisms ranged from 53-380 μg/mL. Methano...

Leaf extracts of the walnut, Juglans regia L., were evaluated under laboratory conditions to determine their acaricidal activity on the mites Tetranychus cinnabarinus (Boisduval) and Tetranychus viennensis Zacher (Acari: Tetranychidae). Extracts had both contact and systemic toxicity to these mites. The four solvents tested for preparing crude extracts were petroleum ether, chloroform, ethyl ac...

AIM Symphytum officinale (comfrey) is a medicinal plant commonly used in decoction and to treat ailments. It protects the skin against ultraviolet (UV)-irradiation. UV irradiation may induce variable effects on the constituents of herbal extracts and thereby may limit or improve the advantages of using these extracts as medicinal supplements. This study aimed to assess the effect of UV radiatio...

Rabbit and mouse antisera prepared against teratocarcinoma cells precipitate both glycoproteins and glycolipids from detergent extracts of radiolabeled cells. Extracts of immunoprecipitates with chloroform/methanol, 2:1 (vol/vol) have been resolved on thin-layer gels into multiple peaks. There are more species seen in extracts of teratocarcinoma cells than in extracts of the crossreacting cultu...

Leafs have contain wide antioxidant range which may provide prevention against radical oxygen species. The aim of this work was to measure the antioxidant capacity of 15 commercially available leaf extracts (ethanol, methanol, water) using ferric reducing antioxidant power (FRAP) assay and trolox equivalent antioxidant capacity (TEAC) assay. Also we evaluated total phenolic and monomeric anthoc...

Different colored bell peppers (Capsicum annuum L.), green, red, and yellow were examined for their content of phenolic compounds, ascorbic acid and carotenoids as well as free radical scavenging activity using DPPH assay and antioxidant activity using ß-carotene/linoleic acid assay. Phenolic, ascorbic acid and carotenoid contents varied in different colored bell peppers. Green pepper had highe...

in this study, antioxidant and antimicrobial potentials of usnea intermedia, u. filipendula, and u. fulvoreagens and their stictic and usnic acid contents were investigated. antioxidant activity and total phenolic contents were evaluated in acetone, ethanol, and methanol extracts of these three species. antioxidant activity was measured by abts [2,2'-azino-bis(3-ethylbenzothiazoline-6-sulp...