Keyword: Bacteria

Briefs: Medical
Ultraviolet-Resistant Bacterial Spores

A document summarizes a study in which it was found that spores of the SAFR-032 strain of Bacillus pumilus can survive doses of ultraviolet (UV) radiation, γ radiation, and hydrogen peroxide in proportions much greater than those of other bacteria. The study was part of a continuing effort to understand...

Briefs: Medical
Surface Bacterial-Spore Assay Using Tb³⁺ /DPA Luminescence

Equipment and a method for rapidly assaying solid surfaces for contamination by bacterial spores are undergoing development. The method would yield a total (nonviable plus viable) spore count of a surface within minutes and a viable-spore count in about one hour. In this method,...

Briefs: Medical
Enumerating Spore-Forming Bacteria Airborne With Particles

A laboratory method has been conceived to enable the enumeration of:

Cultivable bacteria and bacterial spores that are, variously, airborne by themselves or carried by, parts of, or otherwise associated with, other airborne particles; and Spore-forming bacteria among all of the...
Briefs: Medical
Instrument Would Detect and Collect Biological Aerosols

A proposed compact, portable instrument would sample micron-sized airborne particles, would discriminate between biological ones (e.g., bacteria) and nonbiological ones (e.g., dust particles), and would collect the detected biological particles for further analysis. The instrument is...

Application Briefs: Sensors/Data Acquisition

Precision temperature data loggers
Veriteq Instruments
Richmond, BC, Canada
604-273-6850
www.veriteq.com
Briefs: Medical

Biomimetic/optical sensors have been proposed as means of real-time detection of bacteria in liquid samples through real-time detection of compounds secreted by the bacteria....

Briefs: Medical

A prototype of an electroporation system for sterilizing wastewater or drinking water has been developed. In electroporation, applied electric fields cause transient and/or permanent changes in...

Briefs: Materials
Photocatalytic Coats in Glass Drinking-Water Bottles

According to a proposal, the insides of glass bottles used to store drinking water would be coated with films consisting of or containing TiO2. In the presence of ultraviolet light, these films would help to remove bacteria, viruses, and trace organic contaminants from the water.

Briefs: Materials

Nanocarpets — that is, carpets of carbon nanotubes — are undergoing development as means of trapping microscopic particles for scientific analysis. Examples of such particles include...

Briefs: Materials

Dendrimeric reporter compounds have been invented for use in sensing and amplifying electrochemical signals from molecular recognition events that involve many chemical and biological entities. These...

Briefs: Materials

A method of in situ remediation of soil contaminated with chlorinated hydrocarbon solvents involves injection of nanometer-size iron particles. This method should not be confused with a...

Briefs: Medical

A rapid, sensitive test using chemiluminescent oligodeoxynucleotide probes has been developed for detecting, identifying, and enumerating intact cells. The test is intended especially...

Briefs: Physical Sciences

An ultraviolet-absorption spectrometer system has been developed as a prototype instrument to be used in continuous, real-time monitoring to detect the growth of biofilms. Such monitoring...

Briefs: Medical
Spore-Forming Bacteria That Resist Sterilization

A report presents a phenotypic and genotypic characterization of a bacterial species that has been found to be of the genus Bacillus and has been tentatively named B. odysseensis because it was isolated from surfaces of the Mars Odyssey spacecraft as part of continuing research on techniques for...

Briefs: Medical
Fluorescent Quantum Dots for Biological Labeling

Fluorescent semiconductor quantum dots that can serve as "on/off" labels for bacteria and other living cells are undergoing development. The "on/off" characterization of these quantum dots refers to the fact that, when properly designed and manufactured, they do not fluoresce until and unless they...

Briefs: Photonics/Optics
Live/Dead Bacterial Spore Assay Using DPA-Triggered Tb Luminescence

A method of measuring the fraction of bacterial spores in a sample that remain viable exploits DPA-triggered luminescence of Tb3+ and is based partly on the same principles as those described in the immediately preceding article. Unlike prior methods for performing...

Briefs: Photonics/Optics
Briefs: Photonics/Optics

Miniature, relatively inexpensive microbioanalytical systems ("laboratory-on-a-chip" devices) have been proposed for the detection of hazardous microbes and toxic chemicals. Each...

Briefs: Medical
Semiselective Optoelectronic Sensors for Monitoring Microbes

Sensor systems are under development for use in real-time detection and quantitation of microbes in water without need for sampling. These systems include arrays of optical sensors; miniature, portable electronic data-acquisition circuits; and optoelectronic interfaces between the...

Briefs: Software
Program Finds Target-Chemical Signals in Multisensor Outputs

A computer program deconvolves the digitized outputs of multiple chemical sensors in an array to extract indications of the identities and con- centrations of target chemicals (which could be individual compounds or specified mixtures of compounds). Chemical-sensor arrays — denoted,...

Briefs: Photonics/Optics
Fiber-Optic Probe Uses Evanescent Waves To Sense Biofilm

A compact instrument includes a fiber-optic probe that utilizes the evanescent-wave interaction to measure the accumulation of a biofilm. This instrument is a prototype of instruments that could be used to effect continuous monitoring and provide early warning of biofilms associated with...

Briefs: Medical

Materials and equipment for determining whether samples of potable water contain harmful microbes have been packaged in a kit. Designed for use aboard spacecraft, the kit is also suitable for terrestrial use in a...

Briefs: Medical

A technique for detecting bacterial endospores via luminescence affords a sensitivity much greater than that of a prior luminescence-based technique from which it is derived. The...

Briefs: Medical

An improved method of sterilizing petri-dish spreaders and a spreader design to implement the method have been developed. In comparison with the conventional methods of sterilizing...

Briefs: Materials
A Technique for Injecting Ag+ Ions as Biocide into H2O

A simple and reliable technique facilitates the addition of silver ions to water supplies to suppress bacterial contamination. In the original application for which the technique was devised, there is a need for Ag+-ion concentrations at a biocidal levels (0.5 mg/L) in 44-L...

Briefs: Medical
Using Photosynthetic Bacteria To Make Oxygen on Mars

A report presents a proposal to harness photosynthetic bacteria to generate essential materials needed during human and robotic exploration on the surface of Mars. Utilizing an extremely small amount of H2O and an ample amount of CO2 (and N2 and/or...

Briefs: Medical

Figure 1 schematically illustrates a laboratory apparatus that provides quantitative information on the density and on the rate of increase (or decrease) of density at which bacteria...

Briefs: Medical

A compact, lightweight, device makes it possible to assess the effects of antibiotics on bacteria. The device safely contains the antibiotic/bacteria mixtures, and its operation...