33results about How to "High exposure rate" patented technology

The invention discloses a preparation method and application of an iridium oxide nanoparticle catalyst. A mixed solution containing a polymer and an iridium-containing compound is uniformly applied toa treated conductive substrate; calcining in an air atmosphere is carried out to convert the iridium-containing compound into iridium oxide and the polymer is decomposed at the same time; the iridiumoxide nanoparticle material which is small in particle size, amorphous and of a porous structure is obtained, polymers remaining on the iridium oxide nanoparticle material are removed through a plasma generator, and the surfaces of iridium oxide nanoparticles are rich in hydroxyl. The film formed by the polymer in the mixed solution is utilized to solve the problem that the iridium-containing compound is agglomerated to form large particles when being calcined to generate the iridium oxide nanoparticles, thereby obtaining the small-particle-size iridium oxide nanoparticles. Besides, the plasma generator is used for removing residual polymers in the calcining process, the contact area of the iridium oxide nano particles is increased, and therefore the catalytic efficiency of the iridium oxide nano particles is improved.

The invention discloses a simplified seed production method of small-grain hybrid rice and a small-grain hybrid seed. The simplified seed production method comprises the following steps: 1) cultivating strong seedlings by using Bing 4114 as a male parent; 2) directly sowing the small-grain sterile line Zhuo 201S serving as a female parent in a field, and throwing the male parent subjected to seedling strengthening in the step 1) into the field with the female parent; and 3) after maturity, harvesting the male parent and the female parent in a mixed manner, and screening and separating to obtain the small-grain hybrids. According to the simplified seed production method of the small-grain hybrid rice, disclosed by the invention, the Bing 4114 with high combining ability, strong disease resistance and homozygous genotype is selected as the male parent, and the small-grain sterile line Zhuo 201S with high stigma exsertion rate, good outcrossing characteristic and excellent agronomic traits is selected as the female parent for mixed sowing hybrid seed production; the high-yield, high-quality and disease-resistant rice small-grain hybrid seeds are obtained, male parents and female parents of the small-grain hybrid seeds are subjected to mixed sowing and mixed harvesting, male parent and female parent seed separation is achieved in combination with screening and separation, and therefore simplified seed production of the small-grain hybrid seeds is achieved.

The invention discloses a breeding method of an erect panicle type long stigma and elongated upmost internode three-line sterile line, belonging to the technical field of rice sterile line breeding. According to the method, an erect panicle type rice variety Shennong 265, a long stigma rice variety Hai B and an elongated upmost internode rice variety IR68902eB1 are taken as target trait providing parents, a superior three-line maintenance line which is large in popularization area in production is taken as a recurrent parent, and the three-line sterile line which has the characters including erect panicle, long stigma and elongated upmost internode at the same time can be bred by hybridization, multiple-crossing and backcross transformation, and the agronomic trait and the yield trait of the three-line sterile line are close to those of the original sterile line. The three-line sterile line does not have sheathed panicle, and is high in stigma exposure rate and outcrossing rate; after three-line hybrid rice is prepared by the three-line sterile line, the seed production yield of the hybrid rice is improved, the production cost is lowered, and the environmental pollution is reduced.

The invention discloses a breeding method for transferring a sterile line of three-line hybrid rice by using a Basmati fragrant rice material. According to the method, excellent germplasm resources in the South Asia region are introduced, planting in different regions and different seasons is conducted, tracking improvement is insisted, and the material Pusa derived from an Indian Basmati fragrant rice group is discovered to have good field plant leaf form, good quality, high resistance and certain holding capacity for a wild abortive type sterile line; through continuous multi-generation system selection, a method for searching individual genotype difference from groups is adopted, the screening pressure on large segregation groups is increased, minor restoring genes are eliminated by generations over 8 years, a high-quality maintainer line material Pusa167-12 is identified from the fragrant rice resources in combination with rice quality early-generation screening and taste evaluation, and through continuous pairing backcross with Zhenshan 97A, a high-quality fragrant sterile line Zhongzhe A which has new plant type, good resistance and quality up to ministerial high-quality rice Class 1-2 standards is successfully transferred.

The invention discloses a breeding method for a sterile line of two-line japonica rice with high outcrossing rate, belonging to the technical field of plant breeding. The breeding method is characterized by breeding a sterile line of japonica rice with high stigma exsertion rate firstly, and then crossbreeding the sterile line with a sterile line of two-line japonica rice with excellent characters, thereby breeding a sterile line of two-line japonica rice with high stigma exsertion rate, high outcrossing rate and excellent characters. The breeding method comprises the following steps: (1) breeding a sterile line of japonica rice with high stigma exsertion rate and high outcrossing rate; and (2) crossbreeding the sterile line of japonica rice with high stigma exsertion rate with a sterile line of two-line japonica rice with excellent characters, thereby breeding a sterile line of two-line japonica rice with high stigma exsertion rate, high outcrossing rate and excellent characters. The breeding method has the advantages that the high stigma exsertion rate and high outcrossing rate are obtained, multiplication production and seed production obtain great breakthrough, the innovation of breeding of the sterile line of two-line japonica rice is realized, the sterile line is low in fertility temperature, stable in infertility, excellent in outcrossing property, good in restorability and strong in combining ability and can be widely applied to matching and breeding of new combinations of hybrid japonica rice, and at present, a combination of Li japonica rice 52S is subjected to regional trial in many provinces.

The plant growth regulator for breeding rice hybrid consists of methoxone sodium 40-60 wt%, 2, 4-D 5-10 wt%, aspirin 5-30 wt% and starch 5-10 wt% mixed together. Into the plant growth regulator, triazolone in 35-40 wt% may be also added. The plant growth regulator has the functions of promoting the elongation of section below the ear of the sterile line, improving plant structure and ear structure, promoting the sterile line to bloom concentratively, raising the blooming period, etc. and thus can save the consumption of gibberellin, raise the hybrid bearing rate and increase hybrid yield.

The invention discloses a method for measuring the optimum sampling period of a rice stigma. A full bloom glumous flower (when the length of the rice stigma reaches the maximum) serves as a sample tobe sampled, firstly, the unified standard is used for sampling, time nodes are easy to control; and secondly, the error generated due to the fact that the sampling periods of different researchers aredifferent in the sampling process is reduced. Data of phenotypic values of obtained length characters of sampled stigma in the period (when a spikelet glumous flower blooms) are accurate, repeatability is high, obtained results can be used for excavating favorable genes of long stigmas, and finely locating, cloning and function-analyzing the stigma length characters; and meanwhile, a rice sterileline is improved by using the long stigma gene excavated by the sampling method, the stigma length of the rice sterile line can be increased, thus the rice stigma exposing rate is improved, and the hybrid seed yield is increased.

The invention relates to a method for breeding a wide-compatibility indica male sterile line with dian-type cytoplasm. The method comprises the following steps: selecting a good-quality japonica rice maintainer line material with a wide-compatibility gene, a short straw, disease resistance as a female parent, hybridizing with existing indica and japonica, selecting a middle partial-indica type short-straw and premature maintainer line material as a male parent to hybridize, and carrying out back-crossing on the hybrid F1 generation with the male parent; selecting partial-indica ideal plant type from back-crossed middle generation, and transforming with a dian-type sterile line material; selecting all-sterile cells or cells with high sterile rate from transformation cells of the dian-type cytoplasm, and carrying out transformation by adopting the corresponding indica maintainer line material which conforms to the breeding targets and requirements as a key point; carrying out build-up surface test-crossing on a stable sterile line material, selecting highly-dominant hybrid rice to combine, and carrying out seed reproduction and seed production of the cells. The method is high and stable in transformation speed; and the obtained sterile line is wide in build-up surface, high in seed reproduction and seed production yield and good in stress resistance.

The invention discloses a japonica two-line thermo-photo-sensitive genie male sterile line seed-selection method. According to the invention, a subspecies two-line japonica/indica sterile line and a rice maintainer line are subjected to hybridization matching, the two-line japonica/indica sterile line F1-generation used in winter and the rice maintainer line F1-generation are subjected to backcross at the same year, and F4-generation is subjected to composite cross of B34Z6, at the same time, through north-south shuttle selection, the single strain which has the advantages of strong tillering force, compact strain, clear plant growth, strong disease resistance, good strain leaf forms, green leaves, small leaves, slight rolling, circle grain shape, large rice ear, and early anthesis habit can be selected, backcross of JDB7-82Z4 is carried out at generation 8, field heredity selection is carried out, lines with earlier flowing time is selected, and the single strain except the above types cannot be selected, and the sterile line stable lines with a lines number 6-4 is selected through 21-generation cycle. The method solves the great economic loss for seed production-peasant household and enterprise due to uselessness by unstable fertility original temperature of the and poor seed production purity of the japonica two-line sterile line (female parent).

The invention discloses a reduced-graphene-oxide-doped electrospining-enhanced nanofiber material. Polyacrylonitrile-maleic anhydride copolymer is taken as a matrix, and reduced graphene oxide is doped in the matrix. The fiber material is large in specific surface area and high in functional group exposure rate, and is an electrospun nanofiber with high adsorbability, a large adsorption amount, high adsorption and enrichment rates, good stability, high sensitivity and good reproducibility; in addition, the material has good water absorption, and can be combined with target molecules better inan aqueous solution. The invention further provides a preparation method of the fiber material. By regulating and optimizing PANCMA polymer, the GO proportion, the spinning voltage, the receiving distance and the flowing speed, the electrospun nanofiber with higher adsorbability, a larger adsorption amount, higher adsorption and degradation rates and better stability and reproducibility is obtained. The invention further discloses application of the fiber material in MG extraction and analysis, and the fiber material has good MG adsorption and extraction performance.

The invention discloses photocatalytic fiber water treatment equipment with a built-in light path, which comprises a treatment tank and a plurality of photocatalytic fibers arranged in the treatment tank, an ultraviolet lamp tube is arranged at the bottom of the treatment tank, a traction assembly is arranged in the treatment tank, the photocatalytic fibers are connected with the traction assembly, and the ultraviolet lamp tube irradiates the end surfaces of the photocatalytic fibers; the photocatalytic fiber is of a skin-core structure and comprises a core layer and a skin layer wrapping thecore layer, the core layer at least comprises transparent resin, and the skin layer at least comprises a transparent fiber-forming high polymer and nano titanium dioxide particles mixed into the transparent fiber-forming high polymer. The photocatalytic fibers arranged in the treatment tank are used for treating sewage, the recycling is easy, the problem of catalyst solid residue pollution is avoided, meanwhile, the exposure rate of titanium dioxide particles can be increased by stretching the photocatalytic fibers, sewage is continuously treated within a certain period of time, and a catalytic reaction is controlled to a certain extent.

The invention discloses a method for preserving the length of a rice stigma. According to the method provided by the invention, with clean water as a control, stigmas with 15 different types of materials are treated by utilizing 6 preserving solutions in different component proportions; and in 120 days from the time of sampling, the lengths of the stigmas are measured in 10 periods of time to analyze the influence of the preserving solutions in different component proportions on the preserving effects of the lengths of the stigmas. Results show that S7 (composed of 5 ml of formaldehyde with aconcentration of 38%, 5 ml of glacial acetic acid, 85 ml of alcohol with a concentration of 50% and 5 ml of glycerol) can preserve the length of a stigma not to be changed in 30 days, and has good effects compared with remaining 5 preserving solutions which can only maintain the length of the rice stigma for 2 to 7 days. By utilization of a selected preserving solution S7 to preserve the stigma, the problem of stigma length reduction caused by incapability of measuring in time due to over-large test population and concentrated flowering time can be solved; and an important significance on mining, cloning and functional verification for the gene of the length of the stigma is achieved.

The invention discloses a composite agent for improving the stigma exsertion rate of a japonica rice three-line sterile line and application of the composite agent. The composite agent is prepared from the following components: 1.5 to 2.5 mg/L of 6-benayl aminopurine, 1.5 to 2.5 mg/L of kinetin, 4 to 6 g/L of jasmonic acid methyl ester, 250 to 350 mg/L of gibberellin 3, 25 to 35 mg/L of monopotassium phosphate, 1.0 to 1.4 g/L of borax and 2.8 to 3.2 g/L of diethylenetriamine. 6-benayl aminopurine, kinetin, methyl jasmonate and gibberellin 3 are combined to prepare the composite agent, the composite agent is safe and pollution-free, the stigma exsertion rate of the japonica rice sterile line can be increased by 13% or above, and the composite agent has a remarkable effect on increasing the maturing rate and the yield of hybrid seed production; compared with clear water, the stigma exposure is improved by nearly 10%, and the hybridization maturing rate is improved by nearly 20%.

The invention discloses a photocatalytic fiber purification device in a long and narrow space. Sewage or air is purified and treated through the photocatalytic fibers; the photocatalytic fiber purification device comprises a shell, a plurality of photocatalytic fibers connected with the shell, a stretching plate fixed to the other end of the photocatalytic fibers, and a winding assembly. The photocatalytic fiber is of a skin-core structure and comprises a core layer and a skin layer wrapping the core layer, the core layer at least comprises transparent resin, and the skin layer at least comprises a transparent fiber-forming high polymer and nano titanium dioxide particles mixed into the transparent fiber-forming high polymer. The environment is purified through the photocatalytic fibers exposed in the long and narrow space, and titanium dioxide particles are not prone to loss, relatively fixed and not prone to agglomeration; meanwhile, the exposure rate of the titanium dioxide particles can be increased by stretching the photocatalytic fibers, the environment is continuously purified within a certain period of time, and the catalytic reaction is controlled to a certain extent.