The aim of the study is to examine the influence of the outplanting time on the cultivation of the kelp Laminaria saccharina in the northwestern Spain, close to its southern limit of distribution in the North Atlantic...The aim of the study is to examine the influence of the outplanting time on the cultivation of the kelp Laminaria saccharina in the northwestern Spain, close to its southern limit of distribution in the North Atlantic coast. We compared two L. saccharina cultures outplanted in February and December. We found that the starting time of outplanting affects to the yield and the substantiality value, as well as the growth rate. The yield, the substantiality value and the growth rates of L. saccharina sporophytes obtained for the trial outplanted in December were significantly higher than those in February. These results can be mainly explained by the effect of temperature on the growth of L. saccharina sporophytes during cultivation. On the other hand, our results show that even in the southern limit of distribution of L. saccharina, the cultivation of this species was very profitable in high yield and quality.展开更多
LM-6,China’s new generation launch vehicle,achieved a successful launch at12：50 Beijing time on November 21,2017 from the Taiyuan Satellite Launch Center.It was the first commercial launch mission of LM-6 since its ...LM-6,China’s new generation launch vehicle,achieved a successful launch at12：50 Beijing time on November 21,2017 from the Taiyuan Satellite Launch Center.It was the first commercial launch mission of LM-6 since its successful maiden flight in 2015.The LM-6carrier rocket carried 3＂Jilin-1＂video satellites into space and accurately placed them into their preset orbits.LM-6 is an important member of the nation’s family of new generation of launch vehicles.展开更多
The revitalization of the historic fabric should not be considered only a matter of safeguarding the cultural heritage of collective memory; it will mainly be to recover and value an urban life, as in the urban contex...The revitalization of the historic fabric should not be considered only a matter of safeguarding the cultural heritage of collective memory; it will mainly be to recover and value an urban life, as in the urban context, the historic centre plays a function of social identification and recognition of the community, that commercial distribution helps to keep alive. It is widely spreading the concept of Old Town as Natural Shopping Centre： with this word, we define commercial complex and not homogenous places, developed over time without programming unit. designed as a unique space, which fall within a certain urban perimeter, work together as a business, financial administration, facilities and service all coordinated by a common policy development. In order to recover the vitality of the consolidated tissue of the city of Parma, the Town Council has started to study its historic centre as Natural Shopping Centre, relying on the potential inherent in the existing commercial streets.展开更多
The purpose of this paper is to compare the performance of two spectrometers that are manufactured from the same company. In this work, heavy metals like lead Pb and copper Cu in the KBr matrix were analyzed using the...The purpose of this paper is to compare the performance of two spectrometers that are manufactured from the same company. In this work, heavy metals like lead Pb and copper Cu in the KBr matrix were analyzed using the laser induced breakdown spectroscopic technique. A Q-switched Nd：YAG laser with 90mJ per pulse operating at the fundamental wavelength of 1064nm and pulse duration of 10 ns was used to generate plasma at the focal region. The important experimental parameters such as the laser energy, integration time, distance between the lens and sample, distance and angle of the optical fiber from the target were optimized. Two spectrometers manufactured by Ocean Optics namely as Maya2000Pro and USB 4000 were employed for anlyzing the spectral lines. The experimental setup and conditions were remained the same for both experiments. The production of spectral lines from each of the interested elements was analyzed and compared with the NIST （National Institute of Standards and Technology） database. The sensitivity, repeatability and limit of detection for each of the systems are discussed in detail.展开更多
基金Suported by the Spanish Ministry of Science and Technology Project (No. AGL2002-01285)a PhD Scholarship of the University of A Corua
文摘The aim of the study is to examine the influence of the outplanting time on the cultivation of the kelp Laminaria saccharina in the northwestern Spain, close to its southern limit of distribution in the North Atlantic coast. We compared two L. saccharina cultures outplanted in February and December. We found that the starting time of outplanting affects to the yield and the substantiality value, as well as the growth rate. The yield, the substantiality value and the growth rates of L. saccharina sporophytes obtained for the trial outplanted in December were significantly higher than those in February. These results can be mainly explained by the effect of temperature on the growth of L. saccharina sporophytes during cultivation. On the other hand, our results show that even in the southern limit of distribution of L. saccharina, the cultivation of this species was very profitable in high yield and quality.
文摘LM-6,China’s new generation launch vehicle,achieved a successful launch at12：50 Beijing time on November 21,2017 from the Taiyuan Satellite Launch Center.It was the first commercial launch mission of LM-6 since its successful maiden flight in 2015.The LM-6carrier rocket carried 3＂Jilin-1＂video satellites into space and accurately placed them into their preset orbits.LM-6 is an important member of the nation’s family of new generation of launch vehicles.
文摘The revitalization of the historic fabric should not be considered only a matter of safeguarding the cultural heritage of collective memory; it will mainly be to recover and value an urban life, as in the urban context, the historic centre plays a function of social identification and recognition of the community, that commercial distribution helps to keep alive. It is widely spreading the concept of Old Town as Natural Shopping Centre： with this word, we define commercial complex and not homogenous places, developed over time without programming unit. designed as a unique space, which fall within a certain urban perimeter, work together as a business, financial administration, facilities and service all coordinated by a common policy development. In order to recover the vitality of the consolidated tissue of the city of Parma, the Town Council has started to study its historic centre as Natural Shopping Centre, relying on the potential inherent in the existing commercial streets.
文摘The purpose of this paper is to compare the performance of two spectrometers that are manufactured from the same company. In this work, heavy metals like lead Pb and copper Cu in the KBr matrix were analyzed using the laser induced breakdown spectroscopic technique. A Q-switched Nd：YAG laser with 90mJ per pulse operating at the fundamental wavelength of 1064nm and pulse duration of 10 ns was used to generate plasma at the focal region. The important experimental parameters such as the laser energy, integration time, distance between the lens and sample, distance and angle of the optical fiber from the target were optimized. Two spectrometers manufactured by Ocean Optics namely as Maya2000Pro and USB 4000 were employed for anlyzing the spectral lines. The experimental setup and conditions were remained the same for both experiments. The production of spectral lines from each of the interested elements was analyzed and compared with the NIST （National Institute of Standards and Technology） database. The sensitivity, repeatability and limit of detection for each of the systems are discussed in detail.
