Predation of attached Pseudomonas putida mt2 by the small ciliate Tetrahymena sp. was investigated with a percolated column system. Grazing rates were examined under static and dynamic conditions and were compared to grazing rates in batch systems containing suspended prey. The prey densities were 2 x 10(8) bacteria per ml of pore space and 2 x 10(8) bacteria per ml of suspension, respectively....

The moth orchid (Phalaenopsis sp.) is one of the most popular orchids due to various colors with distinctive shapes flowers. Soft rot disease caused by Pectobacteriaceae (SRP) family commonly found infected this plant. showed pale-colored blackish slimy rot. This research was conducted in three locations namely Denpasar, Badung, and Karangasem, resulted 10 candidates for pathogenic bacteria. pa...

The electrical conductivity of solutions depends upon the concentrations and the mobilities of charged particles of varying sizes. A culture medium in which bacteria are living and dying is a heterogeneous system, the composition and complexity of which are constantly changing. Substances in true and in colloidal solution are being chemically disintegrated and synthesized. The initial and final...

A suspension of Staphylococcus aureus deposited on the skin was much more effectively removed by soap-and-water washing when it had been spread and allowed to dry (mean survival 2%) than when it had been rubbed on to the skin (mean survival 29.9%); when antiseptics (70% ethyl alcohol, Hibiscrub without added water) were used, there was no difference between their action against bacteria dried o...

Suspensions of self-propelled microscopic particles, such as swimming bacteria, exhibit collective motion leading to remarkable experimentally-observable macroscopic properties. Rigorous mathematical analysis of this emergent behavior can provide significant insight into the mechanisms behind these experimental observations; however, there are many theoretical questions remaining unanswered. In...

Myxothiazol, a new antibiotic from the myxobacterium Myxococcus fulvus, inhibited the growth of many yeasts and fungi at concentrations between 0.01 and 3 micrograms/ml. It was generally inactive against bacteria. The inhibitory effect was cytostatic. With Candida albicans, Saccharomyces cerevisiae, and Mucor hiemalis, the growth inhibition was neutralized by glucose. Soon after being added to ...

Methods Efficacy studies were conducted according to ASTM E1174 or with modifications to the hand contamination procedure as follows: For ASTM E2755 studies, hands were contaminated with 0.2 ml of a concentrated challenge suspension to reduce soil load and eliminate post contamination hand wetness commonly associated with testing per E1174. For the “contact contamination” procedure hands were c...

Directed mutagenesis of a gene coding for a membrane protein of the periodontopathogen Actinobacillus actinomycetemcomitans was achieved by conjugation. The gene was disrupted by insertion of an antibiotic cassette into a unique endonuclease restriction sequence engineered by inverse PCR. The disrupted gene was cloned into a conjugative plasmid and transferred from Escherichia coli to A. actino...

The antibacterial effect of Lippia sidoides (rosemary pepper) essential oil was tested against the bacteria Staphylococcus aureus and Escherichia coli isolated from homemade Minas cheese produced in Brazil. The Minimum Inhibitory Concentration (MIC) determined in the Dilution Test was 13 L oil mL-1 for both bacteria, which characterizes inhibitory action in broth for a 24hour interaction perio...

The random energy landscapes developed by speckle fields can be used to confine and manipulate a large number of micro-particles with a single laser beam. By means of molecular dynamics simulations, we investigate the static and dynamic properties of an active suspension of swimming bacteria embedded into speckle patterns. Looking at the correlation of the density fluctuations and the equilibri...