Abstract:
Isolated DNA from Penaeus vannamei was digested with restriction enzymes, restriction fragments of genomic DNA inserted into a plasmid vector and screened for recombinant plasmids containing repeated sequences. Ten of the resulting isolates contained representatives of the same repeated element, a satellite sequence present in one or more blocks of tandemly repeated units. The cloned repeat units range in size from about 100 to 200 base pairs, more typically between about 139 to 188 base pairs. Embedded within each cloned repeat unit are 6 to 15 copies of a tandemly repeated pentanucleotide microsatellite. The genome of P. vannamei contains approximately one million copies of this satellite/microsatellite unit. The sequences are useful as markers for the selection of shrimp having a genetically-transmitted favorable growth characteristic, such as increased reproduction, enhanced growth rate, increased size, disease-resistance, and the ability to grow in colder waters, for improved aquacultured shrimp production. Hybridization of the marker to an isolated Peaneus shrimp mucleic acid molecule can be used to identify species, strains or individual shrimp having the desired characteristics. Once identified, these shrimps can be bred to shrimp having the same or an additional desired characteristic to produce a high quality, genetically superior seedstock or larvae useful for the economic production of farmed shrimp.
Abstract:
This invention describes a high temperature aerosol decomposition reactor for producing metal containing materials and methods of producing metal containing materials using the same. The metal containing materials produced by the method of the present invention include metal oxides, catalytic compositions, superconducting materials, and electrically conducting ceramics.
Abstract:
A method for the selection of shrimp having a genetically-transmitted favorable growth characteristic for improved aquacultured shrimp production. A genetic marker for the favorable characteristic is prepared by isolating (Penaeus) shrimp nuclear DNA by extraction with chloroform in the presence of cetyl trimethyl ammonium bromide, digesting the DNA with one or more restriction enzymes, and identifying characteristic restriction fragments. The marker is hybridized to a nuclear nucleic acid molecule isolated from (Penaeus) shrimp for the selection of shrimp having the desired characteristic. The marker can be a labelled probe or a primer for amplification and subsequent detection of a gene that encodes a protein promoting the desired growth characteristic. The selected shrimp can be used to produce a high quality, genetically superior seedstock or larvae useful for the economic production of aquacultured shrimp.
Abstract:
A non-invasive system for measuring the concentration of an analyte, such as glucose, in an absorbing matrix is described. The system directs beams of light at the matrix using an analyte sensitive wavelength and an analyte insensitive wavelength. The principles of photoplethysmography are applied to measure the change in light intensity caused by matrix absorption before and after the blood volume change caused by the systolic phase of the cardiac cycle. The change in light intensity is converted to an electrical signal which is used to adjust the light intensity and as a measure of analyte concentration.
Abstract:
A process for the preparation of nanophase solid state materials having crystallite morphology and particle sizes in the range of from about 1 nm to 30 nm is disclosed. Novel nanophase solid state materials are also disclosed.
Abstract:
A method of transforming Artemisia annua with Agrobacterium rhizogenes. More particularly, a method for producing an Agrobacterium rhyzogenes hairy root cell culture of Artemisia annua. The method of transformation of A. annua includes the transformation of whole plants with A. rhyzogenes, and also includes transformation of A. annua root cultures with A. rhizogenes. The present invention also relates to transformed A. annua. The present invention also relates to a method for extracting enhanced amounts of a plant secondary metabolite from plant tissue with limited loss of tissue viability by reversibly permeabilizing the tissue membrane is disclosed.
Abstract translation:用发根农杆菌转化青蒿的方法。 更具体地说,涉及一种用于生产艾蒿的根癌土壤杆菌毛根细胞培养物的方法。 A. annua的转化方法包括用A. rhyzogenes转化整株植物,还包括A.Anua根培养物与A.nizogenes的转化。 本发明还涉及转化的A. annua。 本发明还涉及一种从植物组织中提取增加量的植物次生代谢物的方法,其中通过可逆地透化组织膜来限制组织活力的丧失。
Abstract:
A process for extracting enhanced amounts of a plant secondary metabolite from plant tissue with limited loss of tissue viability by reversibly permeabilizing the tissue membrane is disclosed.
Abstract:
A non-invasive system for measuring the concentration of an analyte in an absorbing matrix is described. The system directs a beam of radiation at the matrix. The beam consists of a series of successive alternate pulses of electro-magnetic radiation, one of which is highly absorbed by the analyte and the other of which is non-absorbed. The transmitted or reflected beam is optically detected and an electrical signal proportional to beam intensity is used to adjust the beam intensity and as a measure of analyte concentration.
Abstract:
A pH-measuring method and device (50) for monitoring and then correcting for electrode drift is provided. The device includes a pH-measuring electrode (54) and more than one reference electrodes (52a-52e). During operation, the pH-measuring device is placed in contact with a sample (51). The pH value measured at each electrode pair is due to the electrical potential difference between the pH electrode and the reference electrode. The maximum and minimum pH values are determined, and then the remaining pH values are averaged together to generate an overall average pH. The maximum and minimun pH values are subtracted from the average pH to generate a difference which is then compared to a user defined drift level to determine if a particular electrode is deficient. The pH values from deficient electrodes are not considered when the overall pH of the sample is determined.
Abstract:
A process for the preparation of solid state materials such as catalysts, electrolytes, piezo electric materials and superconductors is disclosed. The process produces materials with high phase purity. Novel solid state materials having high phase purity are also disclosed.