step. The presence of Vent DNA polymerase and PCR products other than the intended DNA linker, however, did not seem to interfere with subsequent reactions because ligations using both gel-purified and unpurified PCR products yielded a similar number of transformants. Eight transformants were tested, all of which contained the PCR product as an insert. The yield was considered to have high effi...

the invention of polymerase chain reaction (pcr) has been a milestone in the history of biological and medical sciences. the applications of pcr have not only completely revolutionised the research in the field of molecular genetics as well as animal and plant biotechnology, but the technique has also proved its relevance and ingenious utility in other fields of forensic sciences, molecular sys...

A robust, ultrasensitive, and accurate quantitative assay was developed for avian reovirus (ARV) with the Light Cycler SYBR Green-based real-time reverse transcription-PCR (real-time LC RT-PCR). The assay exhibited high specificity as all negative controls and other avian pathogens, such as Newcastle disease virus (NDV), infectious bronchitis virus (IBV), infectious bursal disease virus (IBDV),...

In cycler and semi-cycler Mars mission architectures a crew “taxi” docks with the interplanetary transfer vehicle on a hyperbolic flyby trajectory, hence the term “hyperbolic rendezvous.” An algorithm that guides the taxi to intercept the transfer vehicle is presented with a control law for final approach. When navigation and thrust uncertainties are included, the vehicles dock at a closing rat...

BACKGROUND Intercomparisons of PCR-based data between laboratories require an assurance of assay reproducibility. We performed an interlaboratory study to investigate the contribution made by a variety of thermal cyclers to PCR performance as measured by interblock reproducibility and intrablock repeatability. METHODS Two standardized assays designed to minimize the introduction of non-therma...

Reliable detection, discrimination and quantification of parasites are important for host-parasite studies and diagnostics. Microsporidial infections are problematic in this respect. Their discrimination and quantification using light microscopy is difficult because spores are the only light microscopically visible form of the parasite and they offer few distinct characters. We developed a quan...

We developed a highly sensitive and specific assay for the rapid detection of smallpox virus DNA on both the Smart Cycler and LightCycler platforms. The assay is based on TaqMan chemistry with the orthopoxvirus hemagglutinin gene used as the target sequence. With genomic DNA purified from variola virus Bangladesh 1975, the limit of detection was estimated to be approximately 25 copies on both m...