This work evaluates the phenotypic response of the model grass (Brachypodium distacbyon (L.) P. Beauv.) to nitrogen and phosphorus nutrition using a combination of imaging techniques and destructive harvest of sho...This work evaluates the phenotypic response of the model grass (Brachypodium distacbyon (L.) P. Beauv.) to nitrogen and phosphorus nutrition using a combination of imaging techniques and destructive harvest of shoots and roots. Reference line Bd21-3 was grown in pots using 11 phosphorus and 11 nitrogen concentrations to establish a dose-response curve. Shoot biovolume and biomass, root length and biomass, and tissue phosphorus and nitrogen concentrations increased with nutrient concentration. Shoot biovolume, estimated by imaging, was highly correlated with dry weight (R2 〉 0.92) and both biovolume and growth rate responded strongly to nutrient availability. Higher nutrient supply increased nodal root length more than other root types. Photochemical efficiency was strongly reduced by low phosphorus concentrations as early as 1 week after germination, suggesting that this measurement may be suitable for high throughput screening of phosphorus response. In contrast, nitrogen concentration had little effect on photochemical efficiency. Changes in biovolume over time were used to compare growth rates of four accessions in response tonitrogen and phosphorus supply. We demonstrate that a time series image-based approach coupled with mathematical modeling provides higher resolution of genotypic response to nutrient supply than traditional destructive techniques and shows promise for high throughput screening and determina- tion of genomic regions associated with superior nutrient use efficiency.展开更多
为了实现对电力线载波(Power Line Communication,PLC)关键技术的自主研发,基于ARM架构搭建了一套完整的点对点PLC通信系统,物理层依托嵌入式ARM、FPGA和DSP等硬件模块实现对关键技术的自主开发,但是针对PLC物理层参数的实时监控需求,...为了实现对电力线载波(Power Line Communication,PLC)关键技术的自主研发,基于ARM架构搭建了一套完整的点对点PLC通信系统,物理层依托嵌入式ARM、FPGA和DSP等硬件模块实现对关键技术的自主开发,但是针对PLC物理层参数的实时监控需求,提出了一种基于Apache和CGI的嵌入式Web服务器的思想。客户端通过HTTP协议可以实时请求数据,对于大量数据采用基于PHP的Jp Graph开源库进行图形化处理以及实时展示,为系统的监测与控制提供了方便。同时,使用嵌入式数据库SQLite作为系统的数据存储与共享工具,为第三方软件的使用与二次开发等提供了开放性接口。展开更多
Phenylurea reacted with dichlorophenylphosphine and aldehydes or ketones by Mannich-type reaction in anhydrous benzene to give five-mem- bered phosphorous heterocyclic compounds.However.derivatives of α-ureidoalkylph...Phenylurea reacted with dichlorophenylphosphine and aldehydes or ketones by Mannich-type reaction in anhydrous benzene to give five-mem- bered phosphorous heterocyclic compounds.However.derivatives of α-ureidoalkylphosphonic acids were obtained as the reaction performed in glacial acetic acid.展开更多
基金supported by the Office of Science (BER), U.S. Department of Energy through Interagency Agreement DE-SC0001526the Australian Grain Research and Development Corporation (GRDC)
文摘This work evaluates the phenotypic response of the model grass (Brachypodium distacbyon (L.) P. Beauv.) to nitrogen and phosphorus nutrition using a combination of imaging techniques and destructive harvest of shoots and roots. Reference line Bd21-3 was grown in pots using 11 phosphorus and 11 nitrogen concentrations to establish a dose-response curve. Shoot biovolume and biomass, root length and biomass, and tissue phosphorus and nitrogen concentrations increased with nutrient concentration. Shoot biovolume, estimated by imaging, was highly correlated with dry weight (R2 〉 0.92) and both biovolume and growth rate responded strongly to nutrient availability. Higher nutrient supply increased nodal root length more than other root types. Photochemical efficiency was strongly reduced by low phosphorus concentrations as early as 1 week after germination, suggesting that this measurement may be suitable for high throughput screening of phosphorus response. In contrast, nitrogen concentration had little effect on photochemical efficiency. Changes in biovolume over time were used to compare growth rates of four accessions in response tonitrogen and phosphorus supply. We demonstrate that a time series image-based approach coupled with mathematical modeling provides higher resolution of genotypic response to nutrient supply than traditional destructive techniques and shows promise for high throughput screening and determina- tion of genomic regions associated with superior nutrient use efficiency.
文摘为了实现对电力线载波(Power Line Communication,PLC)关键技术的自主研发,基于ARM架构搭建了一套完整的点对点PLC通信系统,物理层依托嵌入式ARM、FPGA和DSP等硬件模块实现对关键技术的自主开发,但是针对PLC物理层参数的实时监控需求,提出了一种基于Apache和CGI的嵌入式Web服务器的思想。客户端通过HTTP协议可以实时请求数据,对于大量数据采用基于PHP的Jp Graph开源库进行图形化处理以及实时展示,为系统的监测与控制提供了方便。同时,使用嵌入式数据库SQLite作为系统的数据存储与共享工具,为第三方软件的使用与二次开发等提供了开放性接口。
基金the National Natural Science Foundation of People's Republic of China:
文摘Phenylurea reacted with dichlorophenylphosphine and aldehydes or ketones by Mannich-type reaction in anhydrous benzene to give five-mem- bered phosphorous heterocyclic compounds.However.derivatives of α-ureidoalkylphosphonic acids were obtained as the reaction performed in glacial acetic acid.