Objective To investigate the feasibility of using synbiotics and probiotics to prevent and cure in- testinal dysbacteriosis after burn. Methods Burned rats were fed with synbiotics and probiotics reagents. and the amo...Objective To investigate the feasibility of using synbiotics and probiotics to prevent and cure in- testinal dysbacteriosis after burn. Methods Burned rats were fed with synbiotics and probiotics reagents. and the amounts of major intestinal florae in caecal contents were detected. Results The major physiological anaerobes were mostly stable, and the conditioned pathogens had no abnormal. Conclusion Tke micro-ecosystem regulator can quickly supplement the decreased physiological anaerobes caused by burning,and avoid the occurrence of dysbacterio- sis.展开更多
By the contingent value method, we studied the non-use value of wetland ecosystem service of Hongxing National Nature Reserve （HNNR） in Heilongjiang Pro- vince, northeast China. The proportion of respondents willing...By the contingent value method, we studied the non-use value of wetland ecosystem service of Hongxing National Nature Reserve （HNNR） in Heilongjiang Pro- vince, northeast China. The proportion of respondents willing to pay （WTP） for protection of HNNR was 63 %. The WTP ratio was affected by geographical area, contact nature, personal preferences, and familiar degree of the respondents. The WTP value was affected by age, education level and career of the respondents. The mainly reasons for people rejecting to pay for protecting HNNR were ＂I am not familiar to HNNR＂ and ＂I had no capacity for additional spending because of low income＂. Weighted average individual WTP value was CNY 59.26 Yuan ind.^-1 year^-1 for all the respondents with WTP. The total non-use ecosystem service value of HNNR was CNY 1430 million Yuan in 2013. The heritage value was highest followed by existence value and option value. From the high ecosystem service value in HNNR, it is very important to construct nature reserve for protecting natural ecosystems and human sustainable use of natural resources.展开更多
The research objective was to investigate past and current forest management practices in the Maluku archipelago, then to create a better management model to improve prosperity for local communities and to guarantee s...The research objective was to investigate past and current forest management practices in the Maluku archipelago, then to create a better management model to improve prosperity for local communities and to guarantee sustainability of forest ecosystems for future generations. Forest land use, the deforestation process, the potential for maintaining natural production forests and the need to establish a management unit for sustainability of natural production forests （PFMU） were analysed. The analysis model used Geographic Information System （GIS） and satellite imaging. The deforestation process was analysed using the multiple regression model. The research determined the importance of two concepts i.e., （1） A macro concept involving the integration of forest development with regional development and （2） A micro concept which detailed the format of the PFMU as a sub-set of the macro concept. The macro concept involves a new Forest Land Use Plan （FLUP）, and the micro concept is a more detailed analysis of a sustainable PFMU, a Management Unit for Protection Forest （PrFMU） and a Management Unit for Conservation Forest （CFMU）. Results showed that the existing FLUCP （Forest Land Use Consensus Plan） policy rather than guaranteeing the sustainability of forests, contributed to their deforestation. The integration of forest management and regional development strategies required the establishment of a new FLUP.展开更多
Modeling of the roughness in micro-nano scale and its influence have not been fully investigated, however the roughness will cause amplitude and phase errors of the radiating slot, and decrease the precision and effic...Modeling of the roughness in micro-nano scale and its influence have not been fully investigated, however the roughness will cause amplitude and phase errors of the radiating slot, and decrease the precision and efficiency of the SWA in Ku-band. Firstly, the roughness is simulated using the electromechanical coupled（EC） model. The relationship between roughness and the antenna＇s radiation properties is obtained. For verification, an antenna proto- type is manufactured and tested, and the simulation method is introduced. According to the prototype, a contrasting experiment dealing with the flatness of the radiating plane is conducted to test the simulation method. The advantage of the EC model is validated by comparisons of the EC model and two classical roughness models （sine wave and fractal function）, which shows that the EC model gives a more accurate description model for roughness, the maxi- mum error is 13%. The existence of roughness strongly broadens the beamwidth and raises the side-lobe level of SWA, which is 1.2 times greater than the ideal antenna. In addition, effect of the EC model＇s evaluation indices is investigated, the most affected scale of the roughness is found, which is 1/10 of the working wavelength. The proposed research provides the instruction for antenna designing and manufacturing.展开更多
氯仿(CHCl_(3))和溴仿(CHBr_(3))是两种重要的挥发性卤代烃(Volatile halohydrocarbon,VHCs),可通过光化学作用,引起臭氧层破坏和温室效应,影响全球气候变化。以黄河三角洲湿地的优势物种—盐地碱蓬(Suaeda glauca)为研究对象,采用室内...氯仿(CHCl_(3))和溴仿(CHBr_(3))是两种重要的挥发性卤代烃(Volatile halohydrocarbon,VHCs),可通过光化学作用,引起臭氧层破坏和温室效应,影响全球气候变化。以黄河三角洲湿地的优势物种—盐地碱蓬(Suaeda glauca)为研究对象,采用室内盆栽培养来探究不同浓度氮输入水平(CK,对照,6.0 g N m^(-2) a^(-1);1.5N0,低氮处理,9.0 g N m^(-2) a^(-1);3.0N0,高氮处理,18.0 g N m^(-2) a^(-1))对盐地碱蓬以及盆栽微生态系统CHCl_(3)、CHBr_(3)通量特征的影响。结果表明,不同氮梯度下盐地碱蓬CHCl_(3)和CHBr_(3)排放通量均呈现出先降后升的趋势,低浓度1.5N0下可以促进盐地碱蓬CHCl_(3)的释放,高浓度3.0N0则抑制;盐地碱蓬CHCl_(3)、CHBr_(3)气体通量的峰值分别出现在枯萎期与苗期,其主要原因是不同氮梯度刺激了气体消耗与产生之间的平衡以及植物各生长期生长因子的改变。由相关性分析可知,盐地碱蓬CHCl_(3)排放通量受多种因子相互作用,植物根长与CHBr_(3)排放之间存在显著相关性,根部越长,CHBr_(3)的排放通量越低。不同氮梯度下盆栽微生态系统内CHCl_(3)、CHBr_(3)排放通量的变化趋势不同,CHCl_(3)通量为先升后降,CHBr_(3)为先降后升,气体通量的最高值与最低值出现在植物不同生长时期,盆栽微生态系统气体排放通量主要受土壤NH^(+)_(4)-N、NO^(-)_(3)-N、以及植物凋落物等交互作用的影响。展开更多
文摘Objective To investigate the feasibility of using synbiotics and probiotics to prevent and cure in- testinal dysbacteriosis after burn. Methods Burned rats were fed with synbiotics and probiotics reagents. and the amounts of major intestinal florae in caecal contents were detected. Results The major physiological anaerobes were mostly stable, and the conditioned pathogens had no abnormal. Conclusion Tke micro-ecosystem regulator can quickly supplement the decreased physiological anaerobes caused by burning,and avoid the occurrence of dysbacterio- sis.
基金supported by the Fundamental Research Funds for the Central Universities(DL13BAX10)the Natural Science Foundation of Heilongjiang Province of China(QC2013C037)the assisted project by Heilongjiang Postdoctoral Funds for Scientific Research Initiation(LBH-Q13006)
文摘By the contingent value method, we studied the non-use value of wetland ecosystem service of Hongxing National Nature Reserve （HNNR） in Heilongjiang Pro- vince, northeast China. The proportion of respondents willing to pay （WTP） for protection of HNNR was 63 %. The WTP ratio was affected by geographical area, contact nature, personal preferences, and familiar degree of the respondents. The WTP value was affected by age, education level and career of the respondents. The mainly reasons for people rejecting to pay for protecting HNNR were ＂I am not familiar to HNNR＂ and ＂I had no capacity for additional spending because of low income＂. Weighted average individual WTP value was CNY 59.26 Yuan ind.^-1 year^-1 for all the respondents with WTP. The total non-use ecosystem service value of HNNR was CNY 1430 million Yuan in 2013. The heritage value was highest followed by existence value and option value. From the high ecosystem service value in HNNR, it is very important to construct nature reserve for protecting natural ecosystems and human sustainable use of natural resources.
文摘The research objective was to investigate past and current forest management practices in the Maluku archipelago, then to create a better management model to improve prosperity for local communities and to guarantee sustainability of forest ecosystems for future generations. Forest land use, the deforestation process, the potential for maintaining natural production forests and the need to establish a management unit for sustainability of natural production forests （PFMU） were analysed. The analysis model used Geographic Information System （GIS） and satellite imaging. The deforestation process was analysed using the multiple regression model. The research determined the importance of two concepts i.e., （1） A macro concept involving the integration of forest development with regional development and （2） A micro concept which detailed the format of the PFMU as a sub-set of the macro concept. The macro concept involves a new Forest Land Use Plan （FLUP）, and the micro concept is a more detailed analysis of a sustainable PFMU, a Management Unit for Protection Forest （PrFMU） and a Management Unit for Conservation Forest （CFMU）. Results showed that the existing FLUCP （Forest Land Use Consensus Plan） policy rather than guaranteeing the sustainability of forests, contributed to their deforestation. The integration of forest management and regional development strategies required the establishment of a new FLUP.
基金Supported by National Natural Science Foundation of China(Grant Nos.51305322,51405364,51475348)
文摘Modeling of the roughness in micro-nano scale and its influence have not been fully investigated, however the roughness will cause amplitude and phase errors of the radiating slot, and decrease the precision and efficiency of the SWA in Ku-band. Firstly, the roughness is simulated using the electromechanical coupled（EC） model. The relationship between roughness and the antenna＇s radiation properties is obtained. For verification, an antenna proto- type is manufactured and tested, and the simulation method is introduced. According to the prototype, a contrasting experiment dealing with the flatness of the radiating plane is conducted to test the simulation method. The advantage of the EC model is validated by comparisons of the EC model and two classical roughness models （sine wave and fractal function）, which shows that the EC model gives a more accurate description model for roughness, the maxi- mum error is 13%. The existence of roughness strongly broadens the beamwidth and raises the side-lobe level of SWA, which is 1.2 times greater than the ideal antenna. In addition, effect of the EC model＇s evaluation indices is investigated, the most affected scale of the roughness is found, which is 1/10 of the working wavelength. The proposed research provides the instruction for antenna designing and manufacturing.
文摘氯仿(CHCl_(3))和溴仿(CHBr_(3))是两种重要的挥发性卤代烃(Volatile halohydrocarbon,VHCs),可通过光化学作用,引起臭氧层破坏和温室效应,影响全球气候变化。以黄河三角洲湿地的优势物种—盐地碱蓬(Suaeda glauca)为研究对象,采用室内盆栽培养来探究不同浓度氮输入水平(CK,对照,6.0 g N m^(-2) a^(-1);1.5N0,低氮处理,9.0 g N m^(-2) a^(-1);3.0N0,高氮处理,18.0 g N m^(-2) a^(-1))对盐地碱蓬以及盆栽微生态系统CHCl_(3)、CHBr_(3)通量特征的影响。结果表明,不同氮梯度下盐地碱蓬CHCl_(3)和CHBr_(3)排放通量均呈现出先降后升的趋势,低浓度1.5N0下可以促进盐地碱蓬CHCl_(3)的释放,高浓度3.0N0则抑制;盐地碱蓬CHCl_(3)、CHBr_(3)气体通量的峰值分别出现在枯萎期与苗期,其主要原因是不同氮梯度刺激了气体消耗与产生之间的平衡以及植物各生长期生长因子的改变。由相关性分析可知,盐地碱蓬CHCl_(3)排放通量受多种因子相互作用,植物根长与CHBr_(3)排放之间存在显著相关性,根部越长,CHBr_(3)的排放通量越低。不同氮梯度下盆栽微生态系统内CHCl_(3)、CHBr_(3)排放通量的变化趋势不同,CHCl_(3)通量为先升后降,CHBr_(3)为先降后升,气体通量的最高值与最低值出现在植物不同生长时期,盆栽微生态系统气体排放通量主要受土壤NH^(+)_(4)-N、NO^(-)_(3)-N、以及植物凋落物等交互作用的影响。
