http://rdf.ncbi.nlm.nih.gov/pubchem/patent/CA-2039482-C
Outgoing Links
| Predicate | Object |
|---|---|
| classificationIPCInventive | http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/G01N21-25 |
| filingDate | 1991-03-18-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| grantDate | 2001-02-13-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| inventor | http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_43d30d80375891ad0bc2b3cfefb08e26 http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_589221f2c6df32347018414797af63a2 http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_4e91150201d34790c19375bcf64f1c81 http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_4b1f87abc8737a98838fd4cb83e1d807 |
| publicationDate | 2001-02-13-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| publicationNumber | CA-2039482-C |
| titleOfInvention | Method & apparatus for measuring oxygen concentration and its subsequent use in estimating nitrogen fixation in plants |
| abstract | A non-invasive method and apparatus are described for measuring the oxygen concentration in the infected cells of the nodules of nitrogen fixing plants in the laboratory or field. In many cases, this information can be used to estimate the nitrogenase activity, and therefore the nitrogen fixation rate, in these nodules since recent studies have shown that the oxygen concentration limits and controls nitrogenase activity under most environmental conditions. Using the same apparatus, a method to measure nodule respiration and nodule oxygen permeability is also described. The nodule oxygen concentration in the infected cells of nodules is maintained at very low levels and has not been measurable previously by non-invasive techniques. The fractional oxygenation of plant hemoglobin is measured spectroscopically using one or more modulated light sources, a number of optical fibres to convey the light to and from the nodules, a photodetector to measure the light passing through the nodule and a detection system such as a photodiode coupled to a microcomputer or a lock-in amplifier to process the output signal. |
| isCitedBy | http://rdf.ncbi.nlm.nih.gov/pubchem/patent/CN-104849219-B http://rdf.ncbi.nlm.nih.gov/pubchem/patent/CN-104849219-A |
| priorityDate | 1990-03-19-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| type | http://data.epo.org/linked-data/def/patent/Publication |
Incoming Links
Total number of triples: 34.