To solve the problem that utilizing an air rower lowers indoor air quality due to the dust stirred up in the course of rowing, an air rower is designed to have the extra function of air purifying. The designed rower i...To solve the problem that utilizing an air rower lowers indoor air quality due to the dust stirred up in the course of rowing, an air rower is designed to have the extra function of air purifying. The designed rower is composed of six parts, which are the frame, air generator, transmission part, air purifying filter cartridge, performance monitor, and electric motor. To fulfill the task, the filter cartridge is vertically arranged to lead the air to enter from the lower part and vent out of the upper part to filter and purify the air before it enters the generator so as that the indoor air is well circulated to improve the air purification effect when the rower is utilizing. The modular detachable design allows the air filter and electric motor to be installed and disassembled to adapt to different air purification needs. The designed rower has the benefit of lower purchasing cost and energy saving that may motivate exercising, bringing more fun and the sense of accomplishment.展开更多
Next-generation sequencing technology has transformed our ability to assess the taxonomic composition functions of host-associated microbiota and microbiomes. More human microbiome research projects—particularly thos...Next-generation sequencing technology has transformed our ability to assess the taxonomic composition functions of host-associated microbiota and microbiomes. More human microbiome research projects—particularly those that explore genomic mutations within the microbiome—will be launched in the next decade. This review focuses on the coevolution of microbes within a microbiome, which shapes strain-level diversity both within and between host species. We also explore the correlation between microbial genomic mutations and common metabolic diseases, and the adaptive evolution of pathogens and probiotics during invasion and colonization. Finally, we discuss advances in methods and algorithms for annotating and analyzing microbial genomic mutations.展开更多
【目的】提高松茸粗多糖提取率,探究松茸多糖纯化组分及抗氧化作用。【方法】采用超声波辅助水提醇沉法提取松茸粗多糖,优化提取工艺,使用DEAE-Sepharose Fast Flow离子柱分离纯化粗多糖,采用离子色谱法分析单糖成分,并测定体外抗氧化...【目的】提高松茸粗多糖提取率,探究松茸多糖纯化组分及抗氧化作用。【方法】采用超声波辅助水提醇沉法提取松茸粗多糖,优化提取工艺,使用DEAE-Sepharose Fast Flow离子柱分离纯化粗多糖,采用离子色谱法分析单糖成分,并测定体外抗氧化活性。【结果】最优提取工艺参数为:浸提时间2.25 h,料液比1∶31(g∶mL),浸提温度83.50℃,该条件下多糖提取率为8.67%。松茸粗多糖经分离纯化后收集到3种多糖组分(TMP-1、TMP-2、TMP-3),主要由岩藻糖、盐酸氨基葡萄糖、半乳糖、葡萄糖和甘露糖组成,其中TMP-1存在鼠李糖,TMP-2和TMP-3存在葡萄糖醛酸。松茸粗多糖和3种纯化多糖组分均具有一定的抗氧化活性且存在量效关系,抗氧化能力强弱为:松茸粗多糖>TMP-2>TMP-3>TMP-1。【结论】松茸多糖有一定的抗氧化活性,且松茸粗多糖效果最好,分离纯化后的多糖组分抗氧化活性有所降低。本研究为松茸多糖的开发利用提供了理论基础,对其功能食品研发具有重要意义。展开更多
文摘To solve the problem that utilizing an air rower lowers indoor air quality due to the dust stirred up in the course of rowing, an air rower is designed to have the extra function of air purifying. The designed rower is composed of six parts, which are the frame, air generator, transmission part, air purifying filter cartridge, performance monitor, and electric motor. To fulfill the task, the filter cartridge is vertically arranged to lead the air to enter from the lower part and vent out of the upper part to filter and purify the air before it enters the generator so as that the indoor air is well circulated to improve the air purification effect when the rower is utilizing. The modular detachable design allows the air filter and electric motor to be installed and disassembled to adapt to different air purification needs. The designed rower has the benefit of lower purchasing cost and energy saving that may motivate exercising, bringing more fun and the sense of accomplishment.
基金supported by the National Natural Science Foundation of China(31701577).
文摘Next-generation sequencing technology has transformed our ability to assess the taxonomic composition functions of host-associated microbiota and microbiomes. More human microbiome research projects—particularly those that explore genomic mutations within the microbiome—will be launched in the next decade. This review focuses on the coevolution of microbes within a microbiome, which shapes strain-level diversity both within and between host species. We also explore the correlation between microbial genomic mutations and common metabolic diseases, and the adaptive evolution of pathogens and probiotics during invasion and colonization. Finally, we discuss advances in methods and algorithms for annotating and analyzing microbial genomic mutations.
文摘【目的】提高松茸粗多糖提取率,探究松茸多糖纯化组分及抗氧化作用。【方法】采用超声波辅助水提醇沉法提取松茸粗多糖,优化提取工艺,使用DEAE-Sepharose Fast Flow离子柱分离纯化粗多糖,采用离子色谱法分析单糖成分,并测定体外抗氧化活性。【结果】最优提取工艺参数为:浸提时间2.25 h,料液比1∶31(g∶mL),浸提温度83.50℃,该条件下多糖提取率为8.67%。松茸粗多糖经分离纯化后收集到3种多糖组分(TMP-1、TMP-2、TMP-3),主要由岩藻糖、盐酸氨基葡萄糖、半乳糖、葡萄糖和甘露糖组成,其中TMP-1存在鼠李糖,TMP-2和TMP-3存在葡萄糖醛酸。松茸粗多糖和3种纯化多糖组分均具有一定的抗氧化活性且存在量效关系,抗氧化能力强弱为:松茸粗多糖>TMP-2>TMP-3>TMP-1。【结论】松茸多糖有一定的抗氧化活性,且松茸粗多糖效果最好,分离纯化后的多糖组分抗氧化活性有所降低。本研究为松茸多糖的开发利用提供了理论基础,对其功能食品研发具有重要意义。
