Abstract: The present invention provides a method for improving a one-time seedling rate of microspore embryoids of Brassica campestris ssp. Chinensis Makino, including the steps of: spraying 6-BA onto a flower bud of a plant; sterilizing the flower bud with alcohol and HgCl2; releasing microspores, filtering and centrifuging to obtain purified microspores; diluting the microspores with a NLN medium, subpackaging into culture dishes, and adding phytic acid; finally, subjecting to heat shock treatment and transferring to culture in the dark until embryoids appear, and then conducting shaking culture; transferring the cultured embryos in a cotyledon stage onto a MS medium for differentiation culture, wherein the culture conditions are: 4° C., 14 h of illumination by blue-red compound light/day, and 14 days of culture; and then continuing to culture under the condition of 25° C. and 14 h of illumination by blue-red compound light/day until seedlings.

Abstract: The present invention provides a method for improving a one-time seedling rate of microspore embryoids of Brassica campestris ssp. Chinensis Makino, including the steps of: spraying 6-BA onto a flower bud of a plant; sterilizing the flower bud with alcohol and HgCl2; releasing microspores, filtering and centrifuging to obtain purified microspores; diluting the microspores with a NLN medium, subpackaging into culture dishes, and adding phytic acid; finally, subjecting to heat shock treatment and transferring to culture in the dark until embryoids appear, and then conducting shaking culture; transferring the cultured embryos in a cotyledon stage onto a MS medium for differentiation culture, wherein the culture conditions are: 4° C., 14 h of illumination by blue-red compound light/day, and 14 days of culture; and then continuing to culture under the condition of 25° C. and 14 h of illumination by blue-red compound light/day until seedlings.

Abstract: The present invention discloses a remediation simulator of deep petroleum contaminated soil and application. The remediation simulator comprises a contaminated layer box. A to-be-remedied soil sample is added to a remediation box of the contaminated layer box; uncontaminated soil is added to cylindrical tubes to provide the pressure for the contaminated soil below; feed tubes are used for feeding liquid for remedying the soil; an air compressor conveys air to the soil and pushes the liquid to diffuse. The remediation simulator of the present invention has a simple structure and simple operations, can really and effectively simulate the deep contaminated soil environment, and also evaluates and screens a method for remedying the deep petroleum contaminated soil.

Abstract: Described herein is a vertical take-off and landing aircraft comprising: an upper enclosure comprising a first upper arm and a second upper arm; a lower enclosure comprising a first lower arm and a second lower arm; wherein the first upper arm and the first lower arm comprise a first upper buckle and a first lower buckle, respectively; wherein the second upper arm and the second lower arm comprise a second upper buckle and a second lower buckle, respectively; wherein the first upper buckle engages the first lower buckle and the second upper buckle engages the second lower buckle, thereby securing the upper enclosure to the lower enclosure.

Abstract: Described herein is a vertical take-off and landing aircraft comprising: an upper enclosure comprising a first upper arm and a second upper arm; a lower enclosure comprising a first lower arm and a second lower arm; wherein the first upper arm and the first lower arm comprise a first upper buckle and a first lower buckle, respectively; wherein the second upper arm and the second lower arm comprise a second upper buckle and a second lower buckle, respectively; wherein the first upper buckle engages the first lower buckle and the second upper buckle engages the second lower buckle, thereby securing the upper enclosure to the lower enclosure.