34 results about "Photoinhibition" patented technology

A dual-beam super-resolution optical storage material read-write device comprises an optical path and a computer; the optical path consists of a recording optical path, a reading-out optical path anda fluorescence collecting optical path. A read-write method is provided. The invention adopts pulsed light induction-continuous photoinhibition quenching recording mode, can quickly read information,solves the problem of recording and reading of materials simultaneously for the first time in the field of super-resolution optical storage, overcomes the erasing effect of photochromic materials in super-resolution recording, and obtains smaller recording spots and improve the storage density of optical discs.

A method for manufacturing a deflection member is disclosed. The method may include the step of incorporating a monomer, a photoinitiator system, a photoinhibitor, and/or a reinforcing member. A further step includes blending the monomer, photoinitiator, and/or photoinhibitor to form a blended photopolymer resin. Further steps may be emitting a first wavelength and emitting a second wavelength. A further step may be polymerizing the monomer to form a resinous framework comprising protuberance locked-on to the reinforcing member.

The present invention generally relates to the field of genetic engineering and obtaining transgenic traits for agronomic applications. More specifically, the present invention relates to a specific transgenic event in agricultural crops that improves plant characteristics. Yet more specifically, the invention relates to a polynucleotide construct comprising a gene from Arabidopsis thaliana. In particular, the polynucleotide construct of the invention comprises the gene AtBBX21 which encodes a B-box protein from Arabidopsis thaliana. The transgenic event of the invention increases green and seed yield, reduces photoinhibition, improves water use efficiency, increases tuber and chlorophyll production and improves photosynthetic rates, among others. The polynucleotide construct of the invention comprises a sequence depicted as SEQ ID NO: 1. The invention also provides a transgenic plant transformed with said polynucleotide construct, wherein said plant exhibits improved characteristics. In a particularly preferred embodiment, the transgenic plant is a potato (Solanum tuberosum) plant that overexpresses a gene from Arabidopsis thaliana, wherein said potato plant exhibits improved characteristics.

The invention relates to a new method for avoiding microalgae photoinhibition and improving astaxanthin yield in the culture process of microalgae. In general, a two-stage method is adopted to cultivate the microalgae to produce astaxanthin, wherein on the first stage, massive reproduction of cells and accumulation of biomass are achieved in a heterotrophic, autotrophic or mixotrophic culture mode, and on the second stage, accumulation of the astaxanthin in the cells are achieved in methods, such as light stress assisted with nutrition stress. However, when the microalgae is transformed from the firsts stage to the second stage, phenomenons, such as light stress usually occur, and accordingly the astaxanthin yield is seriously influenced. Therefore, multiple methods are adopted to control culture conditions in a transformation process, such as medium components controlling, sunshading, weak light transition, initial inoculated density improving, gradual dilution and outdoor inoculated time adjusting so that cell conditions can be adjusted and the cells can improve the ability to resist a strong light; therefore, thelight stress problem of the microalgae under the strong light is solved completely, the efficiency of the microalgae for producing the astaxanthin is improved greatly, and low cost, high efficiency and large-scale cultivation of the microalgae for producing the astaxanthin are achieved.

The invention discloses application of an OsGP3 gene is improving photoinhibition resistance of rice, and belongs to the technical field of plant genetic engineering. According to the invention, a vector constructed through RNAi interference technology is imported into the rice, so that the expression of the OsGP3 gene in the rice is inhibited, and subsequently the functional expression of the OsGP3 gene in a rice plant is researched. A result obtained by comparing with a wild type plant shows that the wild type plant is significantly higher than a transformed plant in NPQ value, showing that the OsGP3 gene plays an important role in photoprotection of the rice; and the OsGP3 gene can be integrated into rice genome through transgenic means, so that the capacity of the rice in consuming excess light energy is enhanced and the effects on protecting the rice and improving crop yield are achieved.

The invention belongs to the field of gene engineering, and discloses a soybean photosynthesis related gene GmDeg2 and an application thereof. The soybean photosynthesis related gene GmDeg2 has a nucleotide sequence as shown in SEQ ID NO. 1; protein coded by the gene has an amino acid sequence shown in SEQ ID NO.2. By using any vector which can guiding expression of exogenous genes in a plant, the GmDeg2 gene of the invention can be introduced into a plant cell so as to obtain a transgenic plant with improved photoinhibition resistance. The gene of the invention has important significance on soybean photoinhibition resistance, especially on cultivation of soybean varieties with high photosynthetic efficiency.

The invention belongs to the technical field of microalgae organisms, and particularly relates to a method for relieving photoinhibition of haematococcus pluvialis. Haematococcus pluvialis cells are transferred to strong light for light inducing after being cultured to reach a platform period, a small-molecular organic matter (glycerol or natrium aceticum) is added to a culture system, photoinhibition of algae cells is relieved, and the accumulation of astaxanthin in the culture process is promoted. By adding the small-molecular organic matter (glycerol or natrium aceticum) during transferringin the culture stage one time or multiple times, the capacity of haematococcus pluvialis of resisting strong light is enhanced, the problem that photoinhibition happens to haematococcus pluvialis under the strong light, so cell density is lowered is sufficiently solved, and the production efficiency of astaxanthin by the haematococcus pluvialis is improved.

The invention discloses a phaseolus vulgaris metalloproteinase PvFtsH2 gene as well as an encoded protein and application thereof, relates to the field of gene engineering, and particularly relates toa plant metalloproteinase PvFtsH2 gene as well as an encoded protein and the application thereof. The invention provides a kidney bean FtsH metalloproteinase PvFtsH2 gene as well as an encoding protein and application thereof. A nucleotide sequence of the PvFtsH2 gene is shown as SEQ ID NO: 1 in a sequence table. The amino acid sequence of the encoded protein is shown as SEQ ID NO: 2. Phytophysiology and molecular biology methods prove that the PvFtsH2 gene plays a role in the photoinhibition response process, and mutation of the gene causes reduction of the FV/FM value, reduction of the chlorophyll content and D1 protein accumulation under the photoinhibition condition. The method has important application value in the aspect of increasing the yield of kidney beans by improving the lightenergy utilization rate.

The invention discloses a preparation method of a grating with continuously changing diffraction efficiency, which comprises the following steps of: adopting a first beam of light and a second beam oflight of which spectral bands are not overlapped with each other, forming interference light after the first beam of light is interfered, and forming light with continuous light intensity change in space by the second beam of light; irradiating interference light and light with continuous light intensity change in space to the photosensitive material at the same time, and obtaining a grating withcontinuously-changed diffraction efficiency; wherein the light-sensitive material is a light-cured material, the light-sensitive material is cured by interference light, and the light-inhibited light-sensitive material with continuous light intensity change in space is cured; or the photosensitive material is a material with photoinduced refractive index change. The preparation method provided bythe invention is obtained by directly exposing the photosensitive material, and mainly aims at the defect of poor uniformity of the emergent light beams of the existing optical system based on the waveguide grating coupler, so that the emergent light beams with uniformly distributed light intensity can be obtained; therefore, the imaging capability, the information transmission capability and other performances of the optical system are effectively improved.

A medium for culturing Euglena includes a cell membrane-permeable electron mediator that includes a biocompatible moiety and a redox-active moiety. A method for culturing Euglena includes culturing Euglena in a medium including a cell membrane-permeable electron mediator that includes a biocompatible moiety and a redox-active moiety. The medium is placed in a fermenter system that includes a device for extracting electrons from the medium. A method for reducing photoinhibition in Euglena includes electrochemically culturing Euglena in a medium including a cell membrane-permeable electron mediator that includes a biocompatible moiety and a redox-active moiety. The medium is placed in a fermenter system that includes a device for extracting electrons from the medium.

A system for single photon absorption based vat photopolymerization additive manufacturing with photoinhibition induced curb and photoexcitation induced cure (SPA2CurbCure), comprising: a build chamber; a two-wavelength projection irradiation unit delivering a patterned photo-curbing exposure mask and a patterned photo-curing exposure mask, respectively, to create a curing legion of initiating chemicals surrounded by a distribution of inhibiting species; wherein a curing light beam comprising light having a first wavelength and a curbing light beam comprising light having a second wavelength from the irradiation unit are manipulated into adjacent complementary exposures, combined by a dichroic beam splitter and collimated into a target resin material in the build chamber.

The present invention provides a device (1) for detecting contamination with a photosynthesis inhibitor, the device including a collection device (10) configured to collect a test liquid, a light-blocking pretreatment tank (21) configured to store the test liquid (2) collected by the collection device in a state of containing phytoplankton, a stirring device configured to maintain a floating state of the phytoplankton in the test liquid stored in the pretreatment tank, an irradiation light source configured to irradiate the phytoplankton in the test liquid stored in the pretreatment tank with weak light having an underwater photon flux density that does not cause photoinhibition, a drainage conduit (40) configured to allow the test liquid discharged from the pretreatment tank to flow thereinto, and a fluorescence quantum efficiency measuring machine (50) provided for the drainage conduit and configured to measure a fluorescence quantum efficiency of the phytoplankton in the test liquid discharged from the pretreatment tank, and a method for detecting contamination with a photosynthesis inhibitor, the method including a liquid supply step, a storing and weak-light irradiation step, and a fluorescence quantum efficiency measurement step.

Devices are provided for inhibiting the electrical activity of an excitable cell through the application of a pulse of light which includes a substrate and a photoreactive film both of non-conducting material and laid directly on one another, in which the photoreactive film includes a layer of semiconductor polymer material and has an interface surface which can be placed in contact with an excitable cell and an electrolyte solution. After absorbing light, when placed in contact with the excitable cell and the electrolyte solution, the photoreactive film produces a potential difference across this interface surface which is capable of giving rise to hyperpolarization of the membrane of the excitable cell. Methods of inhibiting the electrical activity of excitable cells using such devices are also provided.

The invention relates to the field of biotechnology, in particular to a peanut violaxanthin decycloxygenase gene, the nucleotide sequence of which is shown in sequence 1 in the sequence list. The amino acid sequence of peanut violaxanthin decycloxygenase gene, the amino acid sequence is shown in sequence 2 in the sequence list. Application of peanut violaxanthin decycloxygenase in protecting photosynthetic apparatus. The peanut violaxanthin decycloxygenase gene was transfected into tobacco to obtain transgenic plants. Under excess light energy stress, the transgenic plants had higher NPQ and deepoxidation status of lutein cycle than wild-type plants, indicating that Under the condition of excess light energy, AhVDE The overexpression of lutein changes the relative content of lutein cycle components, which leads to the change of deepoxidation state and improves the heat dissipation capacity of lutein cycle. The enhanced ability of transgenic plants to dissipate excess light energy reduces the pressure of PSII excitation energy, thereby reducing the degree of photoinhibition of PSII and PSI under excess light energy stress, and finally protecting the photosynthetic apparatus.

The invention discloses a method for inhibiting growth of harmful blue algae by utilizing colored light. Blue fluorescent lamps are erected on the water surface and arranged on the water area side by side in parallel, and meanwhile it is ensured that the whole underwater light environment is within a certain wavelength range. When harmful blue algae are not massively propagated in spring and early summer, the advantages of green algae are enhanced. The method provided by the invention is low in implementation cost, remarkable in effect, simple to operate and easy to popularize.

The invention belongs to the field of genetic engineering, and discloses a soybean photosynthesis related gene GmDeg1 and applications thereof. The nucleotide sequence of the soybean photosynthesis related gene GmDeg1 is shown as SEQ ID NO. 1, and the amino acid sequence of coded proteins is shown as SEQ ID NO. 2. By using a carrier which can guide an exogenous gene to be expressed in a plant, the gene GmDeg1 disclosed by the invention is guided into plant cells, so that a transgenic plant with an improved photoinhibition resistance capacity can be obtained. The gene disclosed by the invention has an anti-photoinhibition effect on soybeans, and especially has a great significance on cultivating high-photosynthetic-efficiency soybean varieties.

The invention discloses a preparation method of a light resistant core-shell type water-based acrylic ester type resin paint and coating agent. The following raw materials in proportion by weight: water, emulsifying agents and methacrylic acid are added into a 500ml flask with three necks; the temperature is raised to 40 to 50 DEG C; stirring is performed for 30min; monomers A are added; emulsification is performed for 30 to 40min; the temperature is raised to 70 DEG C; backflow water starts to be introduced; after the temperature is raised to 80 DEG C, heat insulation is performed for 2h; 0.2to 0.4g of initiators (6g of water is used for dissolution) are dropwise added; the dropwise adding time lasts 30 to 70 min; after the dropwise addition is completed, reaction is performed for 2h; core layer emulsion is obtained; the monomers B and 0.2 to 0.5g of initiators (6g of water is used for dissolution) are dropwise added into the obtained core layer emulsion at the same time, and the dropwise adding time lasts 40 min; after the dropwise addition is completed, heat insulation is performed for 85 to 95 DEG C; stirring reaction is performed for 1 to 2h; at the temperature, 0.4g of emulsifying agents and 0.1 to 0.3g of cross-linking agents and photoinhibition fixatives are added; the reaction is performed for 40min; ammonium hydroxide is added for regulating the pH value to 7 to 8; the light resistant core-shell type water-based acrylic ester type resin paint and coating agent. The obtained paint and coating agent has high light resistant performance.