58 results about "Photosynthetic pigment" patented technology

Quantum dot (QD) LEDs useful for plant, algael and photosynthetic bacterial growth applications. The QD LEDs utilizes a solid state LED (typically emitting blue or UV light) as the primary light source and one or more QD elements as a secondary light source that down-converts the primary light. The emission profile of the QD LED can be tuned to correspond to the absorbance spectrum of one or more photosynthetic pigments of the organism.

The invention discloses a discrete three-dimensional fluorescence spectrum-based phytoplankton identification and measurement method and a discrete three-dimensional fluorescence spectrum-based phytoplankton identification and measurement device. The measurement method comprises the following steps: selecting a characteristic fluorescence peak which corresponds to different photosynthetic pigments as an analytic target according to fingerprint characteristics of a phytoplankton fluorescence spectrum, maintaining the phytoplankton characteristic information in the three-dimensional fluorescence spectrum to the greatest degree, fitting a characteristic spectrum of the sample according to each characteristic spectrum in a standard discrete three-dimensional fluorescence spectrum library, and inverting the types and the content of the phytoplankton in the sample. According to the measurement device, a multiband light-emitting diode (LED) array serves as an excitation light source, and a multiband light filter group serves as a band selector for receiving fluorescence. The device is simple and compact in structure, small in size and convenient to carry and is suitable for identification and measurement of field phytoplankton, the phytoplankton identification and measurement method provided by the invention is combined, so that rapid classified measurement on the phytoplankton site can be realized.

The present invention provides an optical probe apparatus and method for microorganism culture monitoring. The optical probe can be immersed within the microorganisms and include at least one emitter and at least two detectors that excite photosynthetic pigments in the culture medium. The optical probe can measure the culture spectral characteristics, targeting those that are an indication of the healthiness and productivity condition. The optical probe can also include a microcontroller and storage. The microcontroller can compare past measurements of the optical probe with current measurements and determine a health status of the microorganisms. The optical probe is optimized to measure spectral characteristics from the microorganism in real time. The present invention relates to a sensor tune to detect the healthiness condition of photosynthetic microorganisms.

The invention discloses an in-situ online detection device for phytoplanktons based on photosynthetic pigment fluorescence. The in-situ online detection device comprises an LED (Light Emitting Diode) annular light source, a cylindrical water sample pool, a fluorescent detection module, a microcontrol circuit module, a casing and a bottom cover. According to the in-situ online detection device disclosed by the invention, by using fluorescence characteristics of photosynthetic pigments of different phytoplanktons, measurement of living fluorescence intensity and chlorophyll fluorescence induction kinetic parameters of the phytoplanktons under the action of exciting light with four wavelengths is realized; meanwhile, the biomass and physiological activity of the phytoplanktons can be reflected; the in-situ online detection device is suitable for real-time monitoring and early warning of eutrophication conditions in key water areas. According to the in-situ online detection device disclosed by the invention, the annular light source is adopted, the utilization rate of a light source and the illumination uniformity are considered, and a main control circuit takes STM32L151 as a core, so that the device can carry out long-term high-performance operation underwater; the in-situ online detection device is provided with the openable and closable bottom cover, so that in-situ water sampling underwater can be realized, the interference of ambient light of a water body and water current fluctuation is overcome, and further the accuracy of in-situ detection is improved.

The invention provides a leaf pigment remote sensing inversion method based on a FOLIUM model. The method comprises the steps that 1, on the basis of the FOLIUM model, green leaf LOPEX93/colorful leaf LOPEX_ZJU data concentrated hemisphere reflection and transmission spectral data, various parameters of the FOLIUM model, a minimum distance spectral fitting method and a least square method optimization method are utilized, and a method for achieving inversion of contents of various pigments corresponding to green/colorful leaves is achieved; 2, the inversion function of the FOLIUM model on all the pigments is elaborated by constructing a scatter diagram by means of measured values and inversion values of all the pigments, and the function of the FOLIUM model is compared with that of a PROSPECT-5 model; 3, comparative evaluation utilizing a accuracy evaluation function root-mean-square error, a deviation, a corrected standard deviation and variation coefficient inversion accuracy is achieved. According to the leaf pigment remote sensing inversion method based on the FOLIUM model, a green/colorful leaf hemisphere reflection and transmission spectra can be utilized for inversion of contents of photosynthetic pigments including chlorophyll a, chlorophyll b and carotenoid or non-photosynthetic pigments including anthocyanin, and compared with the PROSPECT-5 model, the inversion accuracy of total chlorophyll and carotenoid can be improved; physio-ecological characteristics of plant bodies can be monitored more accurately.

The invention provides a weeding method for millet planting. The weeding method comprises the following steps: selecting millet seeds and soaking the millet seeds with brassinolide with the concentration of 0.001-1mg/L; spraying a weed killer with the concentration of 7.5mg/L in farms after seeding, and spraying the brassinolide with the concentration of 0.0125-0.4mg/L on foliages after 24 hours, wherein the weed killer is a water solution of iodosulfuron-methyl-sodium.mesosulfuron-methyl water dispersible granules and alkyl ethyl sulfonate at a weight ratio of 9 to 1. According to the weeding method, the seeds are soaked with the brassinolide solution, so that the plant height and biomass of the grown millets can be improved, and the photosynthetic pigment content in seeding leaves of the millets can be reduced to a certain extent. According to the weeding method, the seeds and seedlings of the millets are processed with the brassinolide, so that the resistance of the millets to the weed killer is improved; modernized operation in the millet planting is convenient; the application range of the existing weed killer is expanded.

The invention provides a preparation method of a nanometer material loaded BiOBr/fabric. Specifically, the method comprises dissolving KBr in water, mixing in fabric to obtain a mixed solution A; dissolving Bi(NO3)3*5H2O into acetic acid aqueous solution, and adding the solution into the mixed solution A, stirring the mixture at room temperature, performing ultrasonic treatment, standing and drying to obtain the prepared nanometer material loaded BiOBr/fabric. The prepared nanometer material loaded BiOBr/fabric is applied to microcystis aeruginosa removal. Under light, the nanometer material loaded BiOBr/fabric can consume O2 in culture media and produce highly oxidizing free radicals on the surface of BiOBr particles to deep degrade and oxidize photosynthetic pigments, phycobiliprotein and on-membrane polyunsaturated fatty acids and further to cause collapse of the photosynthetic function, hindering of protein synthesis and peroxidation of cell membrane lipids, thereby damaging alga cells and inhibiting growths of alga cells.

The invention relates to a hyperspectral identification method for algal community structures in a water bloom stage, and belongs to the field of ecological environment monitoring. Firstly, a water bloom phenomenon is preliminarily judged by adopting a high-definition photo; spectral characteristic differences of reflection spectrum sensitive wavelengths of blue algae, green algae and diatom populations on the water surface are utilized to construct spectral parameters representing algae communities and population diagnosis photosynthetic pigments, the spectral parameters are applied to finaljudgment of a bloom phenomenon and quantitative estimation of algae population characteristics, and finally, extraction of algae community structures in a bloom stage is realized by calculating a relative abundance ratio of blue-green-diatom populations. The method can accurately judge the water bloom phenomenon and identify algal community structures in a water bloom stage.

Methods and compositions to temporarily delay the ripening, maturation, senescence and pathogen infection of produce such as fruits, vegetables and ornamental plants are provided. The methods involve the application of a photosynthetic pigment and/or membrane stabilizing chemical (e.g. glycine betaine) to produce which is identified as in need of such delay. Application may be prior to harvest, at or during harvest or post-harvest.

The invention provides application of aminolevulinic acid in promoting growth of pseudochlorella kjeldahl. The application comprises the following specific steps that in the growth process of the pseudochlorella kjeldahl, 5-aminolevulinic acid is added into a culture medium once every 5-8 days, and the 5-aminolevulinic acid can be replaced by a 5-aminolevulinic acid derivative, so that logarithmic phase growth time of the pseudochlorella kjeldahl is prolonged, the increase of the unit biomass of the pseudochlorella kjeldahl is promoted, and the accumulation of photosynthetic pigments of the pseudochlorella kjeldahl is promoted.

The invention discloses a chemical regulation method for increasing the quality and resistance of sandalwood seedlings and belongs to the field of plant growth regulation. The chemical regulation method includes: selecting and preparing a growth regulation agent, isolating host plants, applying the growth regulation agent, performing seedling management and the like. The chemical regulation methodhas the advantages that the ground diameter and canopy growth of the sandalwood seedlings can be promoted evidently, biomass accumulation is increased, seedling quality indexes (QI) are increased, the synthesizing of leaf photosynthetic pigment is promoted, the content of soluble sugar and soluble protein in leaves is increased, the net photosynthetic rate of the leaves is enhanced, the activityof antioxidant enzymes (catalase, peroxidase and superoxide dismutase) is increased evidently, membrane lipid peroxidation is reduced, stress resistance is enhanced, and economic benefits are increased to the maximum degree; the method is simple to operate, quick in action, practicable and the like.

The invention discloses a method for preparing a quantitative standard substance of photosynthetic pigments. The method comprises the following steps: carrying out xenicculture on limnetic algae, extracting mixed photosynthetic pigments in the limnetic algae under dark condition, and performing separating and purification, thus obtaining target photosynthetic pigments; and concentrating to obtain the enriched target photosynthetic pigments, quantifying the enriched target photosynthetic pigments, thus obtaining the quantitative standard substance of photosynthetic pigments. The method can be used for rapidly and economically preparing the quantitative standard substance at least including nine common target diagnosis photosynthetic pigments in all limnetic algae photosynthetic pigments; the quantitative standard substance is convenient to apply, good in repeatability, and high in accuracy and reliability, and can be widely applied to the field of researching phyto-group formation of phytoplankton or ultra-miniature phytoplankton.

The invention provides a method for improving the quality of facility Chinese cabbages before harvesting, and belongs to the technical field of plant cultivation. The method comprises the following steps: 5-15 days before harvesting of Chinese cabbages, white light is adopted as a basic light source, and blue light or UV-A is overlaid and radiated on the Chinese cabbages. According to the method, the growth of the Chinese cabbages can be promoted, the biomass of the Chinese cabbages is increased, the total amount of photosynthetic pigments (chlorophyll a and chlorophyll b) of the Chinese cabbages is increased, the content of total phenols, flavonoids and anthocyanin of the Chinese cabbages is increased, the oxidation resistance is improved, and the content of nitrate of the Chinese cabbages is reduced.

The invention discloses a method for improving drought resistance of peonies for oil with jasmonic acid. The method for inducing drought resistance of peonies for oil with jasmonic acid comprises thefollowing steps: 1) selecting annual seedlings of peonies for oil with consistent growth and no pests in October and cultivating the seedlings; 2) cultivating the seedlings in a greenhouse at room temperature until May of the following year, during which normal moisture management is carried out; 3) spraying jasmonic acid on the whole plant of peonies for oil until liquid drops from upper and lower surfaces of leaves, with one spray every 3 days, a total of two sprays, and then obtaining the peonies with drought resistance for oil. According to the invention, exogenous induction with JA in different concentrations is adopted during growth of the peonies for oil, thereby significantly improving contents of osmotic adjustment substances and photosynthetic pigments (chlorophyll a, chlorophyllb, and carotenoids) and reducing content of malonaldehyde in the peonies for oil under drought stress, reducing cell membrane lipid peroxidation, promoting photosynthesis of 'Feng Dan' peonies, and enhancing defense ability against drought stress.

The invention discloses a bagging method for changing appearance of cucumber fruits and/or improving special flavor quality of cucumber fruits. The bagging method comprises the steps that kraft paper bags are adopted to serve as bags; the kraft paper bags are of double-layer structures, outer layers are yellow, and inner layers are black; the density of kraft paper forming the kraft paper bags is 58.76 g/m<2>, and the thickness is 0.0804 mm; the kraft paper bags are rectangular, the length of the kraft paper bags is 25-35 cm, and the width of the kraft paper bags is 10-15 cm; the bagging time is from the day of female flower blooming to cucumber maturity. The bagging method is convenient to operate, the appearance of cucumber fruits is changed, and the photosynthetic pigment content in the fruits is decreased. The bagging method makes the flavor quality of the fruits changed, the relative content, of main flavor substances 2E, 6Z-nonadienaldehyde and 2E-hydroxynonenal in ZN16, of the cucumber fruits is increased, aromatic substance varieties in the ZN16 are decreased, and the proportion of aldehydes materials in total aromatic substances is obviously improved.