biofilm is a community of bacteria which are attaching to a surface. they are responsible for many of catheter related or dental plaque related infectious diseases. different approaches have been used for preventing biofilm related infections in health care settings. many of these methods have disadvantages such as chemical based complications, and emergent antibiotic resistant strains. therefo...

an important part of plant in vitro techniques is the sterilization of explants and the maintenance of aseptic conditions. ideally, sterilizing materials should be effective on a vast range of microorganisms at low density. nowadays, the use of compounds such as essential oils (eos) and nanoparticles is applicable in microbiology studies. the main objective of this experiment was to study the s...

An improved method of sample preparation was used in a microplate assay to evaluate the bactericidal activity levels of 96 essential oils and 23 oil compounds against Campylobacter jejuni, Escherichia coli O157:H7, Listeria monocytogenes, and Salmonella enterica obtained from food and clinical sources. Bactericidal activity (BA50) was defined as the percentage of the sample in the assay mixture...

Based on the local Shannon entropy concept in information theory, a new measure of aromaticity is introduced. This index, which describes the probability of electronic charge distribution between atoms in a given ring, is called Shannon aromaticity (SA). Using B3LYP method and different basis sets (6-31G**, 6-31+G** and 6-311++G**), the SA values of some five-membered heterocycles, C(4)H(4)X, a...

A new formulation of a pose refinement technique using “active” models is described. An error term derived from the detection of image derivatives close to an initial object hypothesis is linearised and solved by least squares. The method is particularly well suited to problems involving external geometrical constraints (such as the ground-plane constraint). We show that the method is able to r...

Four fundamental physical parameters of series of benzene derivatives were studied to ascertain correlations with biological activity. These included octanol/water coefficient, vapor pressure, infrared absorption (out-of-plane C-H vibration), and the pi values. Each physicochemical constant exhibited a partial correlation with biological activity suggesting that each played a role. It was presu...

Objective: This is the first study to evaluate the effect of carvacrol on pulmonary function tests (PFT), and total and differential white blood cell (WBC) counts in healthy volunteers. Materials and Methods: Thirty healthy volunteers were recruited based on the inclusion and exclusion criteria. The subjects were treated with two doses of carvacrol (1 and 2 mg/kg/day) for 1 month. Total and di...

The essential oil of the aerial parts of Lantana achyranthifolia Desf. (Verbenaceae) was examined by GC and GC-MS. Eighteen constituents were identified. Carvacrol, 1,8-cineole, isocaryophyllene, beta-bisabolene and alpha-bisabolol were found to be the major components. The oil exhibited antibacterial activity against fourteen Gram-positive and Gram-negative bacteria.

objective(s):with regard to pharmacological effects of carvacrol on the respiratory system, its effect on cytokines genes expression in splenocytes of asthmatic mice was examined in this study. materials and methods:splenocytes were isolated from non-sensitized (control group), sensitized mice to ovalbumin (ova) (group s), and s animals treated with dexamethasone, and three concentrations of ca...