Abstract: The present disclosure relates to the technical field of oxygen carrier, discloses a medium-entropy perovskite oxygen carrier and its preparation method and application thereof, the synthesis procedure includes preparing an aqueous solution from metallic nitrate serving as a raw material, performing a coprecipitation reaction with at least one of aqueous ammonia solution, a sodium hydroxide aqueous solution or a sodium carbonate aqueous solution as a precipitant at a pH value of 9.5 to 10.5; obtaining the La3CoMnAlO9 powers after stirring, standing, washing, drying and calcining. The preparation method is simple, synthetic conditions are easy to control, and batch production could be achieved.

Abstract: A continuous sample introduction method is provided. The method includes controlling a current sample holder advancing mechanism to perform an advancing operation according to a sample introduction trigger signal, so that the current sample holder advancing mechanism moves in a direction from an initial position to a limiting position, and during the movement, a pushing portion of the current sample holder advancing mechanism is capable of abutting against a side wall of a sample holder in a current sample loading device; controlling the current sample holder advancing mechanism to perform a returning operation when the current sample holder advancing mechanism moves to the limiting position, and during the movement, the pushing portion is capable of avoiding contacting with the sample holder; and the current sample holder advancing mechanism automatically repeats the advancing operation and the returning operation when the current sample holder advancing mechanism moves to the initial position.

Abstract: A breeding method of a polyploid rice photo-thermo-sensitive genetic male sterile line includes determining a diploid rice line with photo-thermo-sensitive genetic male sterility or PMeS characteristic as a parent; carrying out hybridization on a diploid photo-thermo-sensitive genetic male sterile line and a diploid PMeS gene line, carrying out doubling culture on a young ear of a hybrid plant into a hybrid tetraploid; back-crossing the hybrid tetraploid with a tetraploid photo-thermo-sensitive genetic male sterile line; selecting a tetraploid male sterile plants from the back-crossed progeny, self-crossing during a low-temperature and short-day fertile period, and then carrying out composite hybridization with another tetraploid rice line having PMeS gene; selecting tetraploid male sterile plants, and detecting the stability of tetraploid male sterile plants after multiple generations of continuous self-crossing; and determining the stable and consistent tetraploid rice sterile line as the polyploid rice pho

Abstract: A breeding method of a polyploid rice two-line restorer line includes determining hybrid parents for breeding the restorer line; breeding a restorer line of an indica sterile/japonica restorer type, or breeding a restorer line of a japonica sterile/indica restorer type, and carrying out backcrossing or composite hybridization after hybridization of the parents; selecting a single plant that meets the breeding goal, carrying out composite hybridization again and carrying out preliminary molecular marker detection; comparing, and selecting a single plant with good traits for continuous selfing until the line is basically stable; selecting a stable line with good traits and detection molecular markers; carrying out test-crossing on the preferred line as a male parent with different types of polyploid sterile lines; and selecting a good hybrid combination and a restorer line thereof.

Abstract: A method for breeding polyploid two-line hybrid rice includes determining a tetraploid rice photo thermosensitive genic male sterile line with the gene characteristic of PMeS (polyploid meiosis stability) and a tetraploid rice restoring line with the gene characteristic of PMeS; hybridizing and matching by indica sterile/japonica restoring or japonica sterile/indica restoring hybrid combination; preparing a tetraploid rice hybrid by adopting a tetraploid rice photo thermosensitive genic male sterile line and a tetraploid rice restoring line; and breeding a stable tetraploid rice hybrid combination which is determined as the polyploid two-line hybrid rice combination.

Abstract: A breeding method of a polyploid rice photo-thermo-sensitive genetic male sterile line includes determining a diploid rice line with photo-thermo-sensitive genetic male sterility or PMeS characteristic as a parent; carrying out hybridization on a diploid photo-thermo-sensitive genetic male sterile line and a diploid PMeS gene line, carrying out doubling culture on a young ear of a hybrid plant into a hybrid tetraploid; back-crossing the hybrid tetraploid with a tetraploid photo-thermo-sensitive genetic male sterile line; selecting a tetraploid male sterile plants from the back-crossed progeny, self-crossing during a low-temperature and short-day fertile period, and then carrying out composite hybridization with another tetraploid rice line having PMeS gene; selecting tetraploid male sterile plants, and detecting the stability of tetraploid male sterile plants after multiple generations of continuous self-crossing; and determining the stable and consistent tetraploid rice sterile line as the polyploid rice pho

Abstract: A method for breeding polyploid two-line hybrid rice includes determining a tetraploid rice photo thermosensitive genic male sterile line with the gene characteristic of PMeS (polyploid meiosis stability) and a tetraploid rice restoring line with the gene characteristic of PMeS; hybridizing and matching by indica sterile/japonica restoring or japonica sterile/indica restoring hybrid combination; preparing a tetraploid rice hybrid by adopting a tetraploid rice photo thermosensitive genic male sterile line and a tetraploid rice restoring line; and breeding a stable tetraploid rice hybrid combination which is determined as the polyploid two-line hybrid rice combination.

Abstract: A breeding method of a polyploid rice two-line restorer line includes determining hybrid parents for breeding the restorer line; breeding a restorer line of an indica sterile/japonica restorer type, or breeding a restorer line of a japonica sterile/indica restorer type, and carrying out backcrossing or composite hybridization after hybridization of the parents; selecting a single plant that meets the breeding goal, carrying out composite hybridization again and carrying out preliminary molecular marker detection; comparing, and selecting a single plant with good traits for continuous selfing until the line is basically stable; selecting a stable line with good traits and detection molecular markers; carrying out test-crossing on the preferred line as a male parent with different types of polyploid sterile lines; and selecting a good hybrid combination and a restorer line thereof.