The unique properties of carbon quantum dots （CQDs） make them promising materials in many ？elds. Herein, we present a facile method for the preparation of photo-luminescent CQDs using humins as the carbon precursor...The unique properties of carbon quantum dots （CQDs） make them promising materials in many ？elds. Herein, we present a facile method for the preparation of photo-luminescent CQDs using humins as the carbon precursor for the purpose of providing a high value-added solution for this “biomass conversion process waste”. The structure of the CQDs was analyzed, and the effects of reaction temperature and time on the CQDs’ ？uorescence were investigated. The results showed that humins were effectively carbonized during the reaction. The ？uorescence intensity of humin-based CQDs initially increased with reaction temperature and time, and subsequently decreased beyond 200℃ and 4 h. Polyaromatic structures and hydrophilic groups such as O-H, C-O, -COOH and C==O groups exist in the CQDs. The humin-based CQDs have the dimension of 3~7 nm with an average size of about 5.5 nm. The highest emission intensity of blue/cyan ？uorescence light at 440 nm is achieved on the excitation with UV light at the wavelength of 330 nm.展开更多
Alzheimer＇s disease is a multifactorial pathology, for which no cure is currently available. Nowadays, researchers are moving towards a new hypothesis of the onset of the illness, linking it to a metabolic impairment...Alzheimer＇s disease is a multifactorial pathology, for which no cure is currently available. Nowadays, researchers are moving towards a new hypothesis of the onset of the illness, linking it to a metabolic impairment, q-his innovative approach will lead to the identification of new targets for the preparation of new effective drugs. Peroxisome proliferator-activated receptors and their ligands are the ideal candidates to reach the necessary breakthrough to defeat this complicate disease.展开更多
In the 1996 AIA （American Institute of Architecture） Convention in Minneapolis, the governing bodies in the education and professionalization of architects in the US （namely, the American Institute of Architecture,...In the 1996 AIA （American Institute of Architecture） Convention in Minneapolis, the governing bodies in the education and professionalization of architects in the US （namely, the American Institute of Architecture, American Institute of Architecture Students, National Council of Architectural Registration Boards, National Architecture Accrediting Board and the Association of Collegiate Schools of Architecture） released the Boyer Report, subsequently published as Building Community： A New Future for Architecture Education and Practice. The report was named in honor of Ernest Boyer, an educational theorist who also participated in writing the text. Less comprehensive than the canonical texts by Marcus Vitruvius Pollio and his interlocutors, it is nonetheless a mirror of our current assumptions about the education of the architect. This paper looks at the epistemology inherited from Vitruvius as it shapes pedagogy up and through the Boyer Report and into the 21 st century. Using a method of comparative analysis applied to past and current architecture programs, our argument is that historical divisions between professional or applied knowledge and liberal or theoretical knowledge inherited from the past limit our capacity within architecture education to integrate new strategies for knowledge creation and dissemination. It is concluded that any serious revision of architecture education means a systematic reconsideration of the basis of architecture knowledge. What of the （persistent） Vitruvian model is relevant in our post-modern condition？ What do we learn from the image of our profession projected through the lens of the Boyer Report and it is like？ In other words, what would Vitruvius do？展开更多
Teaching and research universities cultivate innovative talents that should have the following characteristics： a strong curiosity and thirst for knowledge, strong ability of self-learning and exploration. They shoul...Teaching and research universities cultivate innovative talents that should have the following characteristics： a strong curiosity and thirst for knowledge, strong ability of self-learning and exploration. They should primarily get engaged in applied basic research, focus on knowledge development and operational needs of the basic technology for logic systems, and acquire subject knowledge and expertise, technological innovation. They should have a good moral training, be able to work or live together with others; have good health and good human qualities, be able to take hard work. For the purposes of teaching and Research University, it is to foster innovative talents, we must adhere to the fundamental status of undergraduate teaching, and gradually promote the study of teaching; we must adhere to the path of industry-university cooperation; students in general education system must be established.展开更多
Graduate education is the main way of high-level personnel training, present, China has formed a shape of postgraduate training mode for China＇s industries to transport a large number of professionals. However, with ...Graduate education is the main way of high-level personnel training, present, China has formed a shape of postgraduate training mode for China＇s industries to transport a large number of professionals. However, with the urgent social and economic needs of complex, application-oriented, innovative talents, how to train graduate students with innovative thinking and creative ability is a major issue facing our country. By describing the status of postgraduate training innovative, practical graduate analyzed the main reason for lack of innovation, and propose how to improve students from various practical ability and training reform measures graduate innovative thinking.展开更多
基金supported by the Research Project for Hot Tracking Items of Beijing Forestry University(2017BLRD03)the National Natural Science Foundation of China(51603012)Beijing Municipal Natural Science Foundation(6182031)
文摘The unique properties of carbon quantum dots （CQDs） make them promising materials in many ？elds. Herein, we present a facile method for the preparation of photo-luminescent CQDs using humins as the carbon precursor for the purpose of providing a high value-added solution for this “biomass conversion process waste”. The structure of the CQDs was analyzed, and the effects of reaction temperature and time on the CQDs’ ？uorescence were investigated. The results showed that humins were effectively carbonized during the reaction. The ？uorescence intensity of humin-based CQDs initially increased with reaction temperature and time, and subsequently decreased beyond 200℃ and 4 h. Polyaromatic structures and hydrophilic groups such as O-H, C-O, -COOH and C==O groups exist in the CQDs. The humin-based CQDs have the dimension of 3~7 nm with an average size of about 5.5 nm. The highest emission intensity of blue/cyan ？uorescence light at 440 nm is achieved on the excitation with UV light at the wavelength of 330 nm.
基金supported by Intervento cofinanziato dal Fondo di Sviluppo e Coesione 2007-2013–APQ Ricerca Regione Puglia "Programma regionale a sostegno della specializzazione intelligente e della sostenibilitàsociale ed ambientale-FutureInResearch".Project ID:I2PCTF6
文摘Alzheimer＇s disease is a multifactorial pathology, for which no cure is currently available. Nowadays, researchers are moving towards a new hypothesis of the onset of the illness, linking it to a metabolic impairment, q-his innovative approach will lead to the identification of new targets for the preparation of new effective drugs. Peroxisome proliferator-activated receptors and their ligands are the ideal candidates to reach the necessary breakthrough to defeat this complicate disease.
文摘In the 1996 AIA （American Institute of Architecture） Convention in Minneapolis, the governing bodies in the education and professionalization of architects in the US （namely, the American Institute of Architecture, American Institute of Architecture Students, National Council of Architectural Registration Boards, National Architecture Accrediting Board and the Association of Collegiate Schools of Architecture） released the Boyer Report, subsequently published as Building Community： A New Future for Architecture Education and Practice. The report was named in honor of Ernest Boyer, an educational theorist who also participated in writing the text. Less comprehensive than the canonical texts by Marcus Vitruvius Pollio and his interlocutors, it is nonetheless a mirror of our current assumptions about the education of the architect. This paper looks at the epistemology inherited from Vitruvius as it shapes pedagogy up and through the Boyer Report and into the 21 st century. Using a method of comparative analysis applied to past and current architecture programs, our argument is that historical divisions between professional or applied knowledge and liberal or theoretical knowledge inherited from the past limit our capacity within architecture education to integrate new strategies for knowledge creation and dissemination. It is concluded that any serious revision of architecture education means a systematic reconsideration of the basis of architecture knowledge. What of the （persistent） Vitruvian model is relevant in our post-modern condition？ What do we learn from the image of our profession projected through the lens of the Boyer Report and it is like？ In other words, what would Vitruvius do？
文摘Teaching and research universities cultivate innovative talents that should have the following characteristics： a strong curiosity and thirst for knowledge, strong ability of self-learning and exploration. They should primarily get engaged in applied basic research, focus on knowledge development and operational needs of the basic technology for logic systems, and acquire subject knowledge and expertise, technological innovation. They should have a good moral training, be able to work or live together with others; have good health and good human qualities, be able to take hard work. For the purposes of teaching and Research University, it is to foster innovative talents, we must adhere to the fundamental status of undergraduate teaching, and gradually promote the study of teaching; we must adhere to the path of industry-university cooperation; students in general education system must be established.
文摘Graduate education is the main way of high-level personnel training, present, China has formed a shape of postgraduate training mode for China＇s industries to transport a large number of professionals. However, with the urgent social and economic needs of complex, application-oriented, innovative talents, how to train graduate students with innovative thinking and creative ability is a major issue facing our country. By describing the status of postgraduate training innovative, practical graduate analyzed the main reason for lack of innovation, and propose how to improve students from various practical ability and training reform measures graduate innovative thinking.
