Green technology innovation and energy intensity in China

This paper investigates the relationship between green technology innovation and energy intensity for 29 provinces in Mainland China from 1999 to 2010. Based on changes in energy intensity in the data, the provinces are divided into four groups: the conventional group, the gradational group, the contemporary group, and the low-carbon group. Industrial structure is included in the study because of its impact on energy intensity, thus avoiding the problem of omitted variable bias. The empirical results indicate that there is a negative, long-run, cointegrated relationship between energy intensity and green technology innovation. We also discover unidirectional causality from green technology innovation to energy intensity in the conventional and low-carbon groups, whereas green technology innovation directly affects energy intensity through a feedback system for the gradational and contemporary groups. To achieve the goal of energy intensity, policymakers should encourage green technology diffusion from the low-carbon group to the conventional group and improve the share of green technology innovation in the gradational and contemporary groups.     

热带地区钝顶螺旋藻的大量培养

于1989年6月—1990年6月,运用开放式半连续培养的方法在海南省三亚市鹿回头海滩建113m~2养殖池,进行海水螺旋藻大量培养试验研究。结果表明:①海水螺旋藻藻种SCS品系(1984年引进非洲乍得湖Spirulina platensis经分离选育,驯化为海水螺旋藻藻种SCS品系)适宜在热带地区进行大量培养;②用海水培养螺旋藻不需调pH值;③循环使用培养液可以节约肥料和药品,是降低成本的途径之一;④海南省海岸线长,南部气温高,日照充足,在那里生产海水螺旋藻产量高[12.01g/(m~2·d)]、质量好(粗蛋白含量67.28％)。以上几点说明海南省南部滩涂可以大规模生产海水螺旋藻。     

海水钝顶螺旋藻藻胆蛋白的初步研究

对海水钝顶螺旋藻Spirulina platensis Geitler藻胆蛋白进行分离、纯化及光谱测定,其种类和吸收光谱与淡水钝顶螺旋藻相似。光强和氮源是影响藻胆蛋白的重要因子,低光强可诱导海水钝顶螺旋藻藻胆蛋白含量大幅度(19.7％)增加;氮源不足或缺乏可导致藻胆蛋白大量降解,随后补充氮源则可使藻胆蛋白含量得到恢复,因而证明藻胆蛋白在海水钝顶螺旋藻中亦可起“氮库(nitrogen pool)”的作用。海南三亚室外生产的海水钝顶螺旋藻干品的藻胆蛋白含量随季节呈现周期性变化,光强可能是主要的影响因子。     

钝顶螺旋藻优良品系SCS的生理特性研究

本文报道从淡水原种中分离筛选出钝顶螺旋藻Spirulina platensis的优良品系SCS的生理特性。该种经过海水驯化后,不仅能在自然海水培养基中生长,而且产量、质量和纯度等方面均明显优于在淡水中培养的同一株系。此外,还具有适应高温和强光等优越的生理特性。     

Effect of information and communication technology on energy consumption in China

Widespread controversy and a lack of empirical research exist with regard to the relationship between information communication technology (ICT) and energy consumption, especially in developing countries. This paper adopts a partial least square (PLS) method to explore the impact of ICT on energy consumption in China. Its main conclusions indicate that the impact can be represented by a U-shaped curve and the turning-point for ICT capital service is 10.93 units at 1990 constant prices. The negative effect of ICT was dominant until 2014. Moreover, the ARDL-ECM results also reveal a negative association between ICT and energy consumption in the short run. In addition, the influence of population, income, industrialization level, service sector development, energy price, energy consumption structure and non-ICT capital service on energy consumption is examined. Finally, policy recommendations are given.     

微藻在污水中的除磷脱氮作用

初步调查了广州海珠区污水排放区污水中微藻的组成,表明该区微藻以蓝藻门颤藻科Ｏｓｃｉｌｌａｔｏｒｉａｃｅａｅ为主,以小颤藻Ｏｓｃｉｌｌａｔｏｒｉａｔｅｎｕｉｓ、两栖颤藻Ｏ．ａｍｐｈｉｌｉａ为优势种;测定了其在污水中的除磷脱氮能力,结果表明,两优势种处理污水氮、磷的能力随微藻的生长期和污水中氮、磷浓度的不同而有较大的变化。     

螺旋藻多糖对移植性癌细胞的抑制作用及其机理的研究

螺旋藻多糖200mg/kg可显著抑制小鼠体内腹水型肝癌细胞的增殖。它对S180和腹水型肝癌细胞DNA,RNA和蛋白质的抑制作用,在3～24h内均随作用时间延长而提高。它对癌细胞DNA合成的抑制作用,属DNA代谢干扰型。螺旋藻多糖虽不能直接杀伤癌细胞,但通过增强机体的免疫力而抑制癌细胞的增殖。