[Objective] The paper was to study the effect of microporous structure of ac- tivated carbon on adsorption performance of n-butane. [Method] Using 8 activated car- bons prepared from different materials and technologi...[Objective] The paper was to study the effect of microporous structure of ac- tivated carbon on adsorption performance of n-butane. [Method] Using 8 activated car- bons prepared from different materials and technologies, the effects of physical prop- erties of activated carbon on butane adsorption performance were investigated. [Result] Specific surface area, pore volume and pore size distribution of activated carbon exert- ed remarkable effects on butane adsorption. The activated carbon with high percent- age of micropore volume within the range of 1.2-2 nm possessed high butane activity. The level of butane retentivity rose with the increase of the volume of pore within the range of 0.5-0,9 nm, which led to smaller butan working capacity （BWC）. [Conclusion] The study provided reference for the adsorption research for activated carbon.展开更多
采用一套专门设计的由微创光纤探头组成的光纤光谱仪生物组织光学参数测试系统,对颅脑创伤的大鼠创伤侧和对照侧进行近红外光谱检测及脑水含量(brain water content:BWC)测定。通过采用Feeney's自由落体撞击法建立大鼠急性局灶性脑...采用一套专门设计的由微创光纤探头组成的光纤光谱仪生物组织光学参数测试系统,对颅脑创伤的大鼠创伤侧和对照侧进行近红外光谱检测及脑水含量(brain water content:BWC)测定。通过采用Feeney's自由落体撞击法建立大鼠急性局灶性脑挫裂伤模型,以近红外光谱技术和干湿比重法监测伤后脑水肿的变化。实验发现:伤后1h,伤侧脑组织已发生水肿,伤后24～72h,伤侧脑水肿达高峰,随后逐渐下降;用脱水剂后,脑水肿情况逐渐好转,随着药物失效,水肿又一次发生。生物组织优化散射系数(Reduced Scat-tering Coefficient:μ′s)与BWC的变化规律一致,有很好的线性相关性,能够较好的反映脑组织水肿程度以及药物脱水效果。证实近红外光谱技术用于颅脑创伤实时监测的可行性,为颅脑创伤的研究提出了一种新技术。展开更多
[Objective] The aim was to study on the high-valued utilization of China Fir sawdust extracted essential oil.[Method] In the field of fir essential oil extraction,the processed China fir sawdust was used to prepare lo...[Objective] The aim was to study on the high-valued utilization of China Fir sawdust extracted essential oil.[Method] In the field of fir essential oil extraction,the processed China fir sawdust was used to prepare low-valued products.The high-valued utilization of China fir sawdust extracted essential oil(CFSEEO),namely as a precursor to prepare granular activated carbons(GACs),was attempted.The materials were characterized by ultimate analysis,SEM and XRD.[Rusult] A butane working capacity(BWC)of 14.3 g/100 ml was obtained by using the GACs with apparent density of 0.25 g/ml.It was available to introduce the technology of extracting essential oil from the China fir sawdust(CFS)in the industrial production process of activated carbons with high BWC(12.0-16.5 g/100 ml)and high surface area(2 000-2 630 m2/g)using phosphoric acid based on previous studies of the authors.[Conclusion] The resulting carbon prepared with the raw materials containing lower moisture exhibited a better property on n-butane adsorption.展开更多
基金Supported by "Eleventh Five-Year" National Science and Technology Support Project(2009BADB1B03)Forestry Public Welfare Industry Special (201004051)~~
文摘[Objective] The paper was to study the effect of microporous structure of ac- tivated carbon on adsorption performance of n-butane. [Method] Using 8 activated car- bons prepared from different materials and technologies, the effects of physical prop- erties of activated carbon on butane adsorption performance were investigated. [Result] Specific surface area, pore volume and pore size distribution of activated carbon exert- ed remarkable effects on butane adsorption. The activated carbon with high percent- age of micropore volume within the range of 1.2-2 nm possessed high butane activity. The level of butane retentivity rose with the increase of the volume of pore within the range of 0.5-0,9 nm, which led to smaller butan working capacity （BWC）. [Conclusion] The study provided reference for the adsorption research for activated carbon.
文摘采用一套专门设计的由微创光纤探头组成的光纤光谱仪生物组织光学参数测试系统,对颅脑创伤的大鼠创伤侧和对照侧进行近红外光谱检测及脑水含量(brain water content:BWC)测定。通过采用Feeney's自由落体撞击法建立大鼠急性局灶性脑挫裂伤模型,以近红外光谱技术和干湿比重法监测伤后脑水肿的变化。实验发现:伤后1h,伤侧脑组织已发生水肿,伤后24～72h,伤侧脑水肿达高峰,随后逐渐下降;用脱水剂后,脑水肿情况逐渐好转,随着药物失效,水肿又一次发生。生物组织优化散射系数(Reduced Scat-tering Coefficient:μ′s)与BWC的变化规律一致,有很好的线性相关性,能够较好的反映脑组织水肿程度以及药物脱水效果。证实近红外光谱技术用于颅脑创伤实时监测的可行性,为颅脑创伤的研究提出了一种新技术。
基金Supported by "11th five year" National Science and Technology Support Project Grants(2009BADB1B03)Forestry Public Welfare Industry Special(201004051)
文摘[Objective] The aim was to study on the high-valued utilization of China Fir sawdust extracted essential oil.[Method] In the field of fir essential oil extraction,the processed China fir sawdust was used to prepare low-valued products.The high-valued utilization of China fir sawdust extracted essential oil(CFSEEO),namely as a precursor to prepare granular activated carbons(GACs),was attempted.The materials were characterized by ultimate analysis,SEM and XRD.[Rusult] A butane working capacity(BWC)of 14.3 g/100 ml was obtained by using the GACs with apparent density of 0.25 g/ml.It was available to introduce the technology of extracting essential oil from the China fir sawdust(CFS)in the industrial production process of activated carbons with high BWC(12.0-16.5 g/100 ml)and high surface area(2 000-2 630 m2/g)using phosphoric acid based on previous studies of the authors.[Conclusion] The resulting carbon prepared with the raw materials containing lower moisture exhibited a better property on n-butane adsorption.
