The theory of digital signal treatment and its application is a discipline with wide and promising prospects, having made its debut in the 1960s. During the period from the end of the 1950s to the 1970s, I was engaged...The theory of digital signal treatment and its application is a discipline with wide and promising prospects, having made its debut in the 1960s. During the period from the end of the 1950s to the 1970s, I was engaged in teaching and research work in the fields of electronics,digital circuits and numerical control and participated in the development of China’s first numerical machine. At the end of the 1970s.I went to the United States展开更多
In vivo fluorescence has a wide application in analyzing microalgae, including assessing phytoplankton biomass, rates of primary production and physiological status. This study describes a preliminary investigation on...In vivo fluorescence has a wide application in analyzing microalgae, including assessing phytoplankton biomass, rates of primary production and physiological status. This study describes a preliminary investigation on the joint application of the three kinds of fluorescence analysis in the physiological study of microalgae. Flow cytometry and fluorescence spectrometry were used to obtain the in vivo static fluorescence information of pigments, and a Pulsed-Amplitude-Modulation chlorophyll fluorometer was used to detect the dynamic fluorescence of chlorophyll. The validity of the joint application was proved by analyzing two labora- tory cultured Arctic microalgae, Pseudo-nitzschia delicatissima （Bacillariophyceae） and Thalassiosira sp. The higher value of minimum fluorescence yield in dark-adapted state （Fo）, actual photochemical efficiency of PSll （ФPSII）, and electron transport rate （ETR） exhibited positive results in a higher cell abundance and chlorophyll a content of P. delicatissima; whereas higher fl-carotene content of Thalassiosira sp. played an important role in the protection of photosynthesis.展开更多
Single-atom catalysts(SACs)have rapidly become a hot topic in photocatalytic research due to their unique physical and chemical properties,high activity,and high selectivity.Among many semiconductor carriers,the speci...Single-atom catalysts(SACs)have rapidly become a hot topic in photocatalytic research due to their unique physical and chemical properties,high activity,and high selectivity.Among many semiconductor carriers,the special structure of carbon nitride(C3N4)perfectly meets the substrate requirements for stabi-lizing SACs;they can also compensate for the photocatalytic defects of C3N4 materials by modifying energy bands and electronic structures.Therefore,devel-oping advanced C3N4-based SACs is of great significance.In this review,we focus on elucidating efficient preparation strategies and the burgeoning photo-catalytic applications of C3N4-based SACs.We also outline prospective strategies for enhancing the performance of SACs and C3N4-based SACs in the future.A comprehensive array of methodologies is presented for identifying and char-acterizing C3N4-based SACs.This includes an exploration of potential atomic catalytic mechanisms through the simulation and regulation of atomic catalytic behaviors and the synergistic effects of single or multiple sites.Subsequently,a forward-looking perspective is adopted to contemplate the future prospects and challenges associated with C3N4-based SACs.This encompasses considerations,such as atomic loading,regulatory design,and the integration of machine learn-ing techniques.It is anticipated that this review will stimulate novel insights into the synthesis of high-load and durable SACs,thereby providing theoretical groundwork for scalable and controllable applications in the field.展开更多
文摘The theory of digital signal treatment and its application is a discipline with wide and promising prospects, having made its debut in the 1960s. During the period from the end of the 1950s to the 1970s, I was engaged in teaching and research work in the fields of electronics,digital circuits and numerical control and participated in the development of China’s first numerical machine. At the end of the 1970s.I went to the United States
基金financially supported by the National Natural Science Foundation of China (Grant no.41076130)the SOA Youth Marine Science Foundation (Grant no.2010116)the Open Research Foundation of Laboratory of Marine Ecosystem and Biogeochemistry,SOA (Grant no.LMEB200902)
文摘In vivo fluorescence has a wide application in analyzing microalgae, including assessing phytoplankton biomass, rates of primary production and physiological status. This study describes a preliminary investigation on the joint application of the three kinds of fluorescence analysis in the physiological study of microalgae. Flow cytometry and fluorescence spectrometry were used to obtain the in vivo static fluorescence information of pigments, and a Pulsed-Amplitude-Modulation chlorophyll fluorometer was used to detect the dynamic fluorescence of chlorophyll. The validity of the joint application was proved by analyzing two labora- tory cultured Arctic microalgae, Pseudo-nitzschia delicatissima （Bacillariophyceae） and Thalassiosira sp. The higher value of minimum fluorescence yield in dark-adapted state （Fo）, actual photochemical efficiency of PSll （ФPSII）, and electron transport rate （ETR） exhibited positive results in a higher cell abundance and chlorophyll a content of P. delicatissima; whereas higher fl-carotene content of Thalassiosira sp. played an important role in the protection of photosynthesis.
基金Key R&D Program of Hubei Province,Grant/Award Number:2022BAA084National Natural Science Foundation of China,Grant/Award Number:62004143。
文摘Single-atom catalysts(SACs)have rapidly become a hot topic in photocatalytic research due to their unique physical and chemical properties,high activity,and high selectivity.Among many semiconductor carriers,the special structure of carbon nitride(C3N4)perfectly meets the substrate requirements for stabi-lizing SACs;they can also compensate for the photocatalytic defects of C3N4 materials by modifying energy bands and electronic structures.Therefore,devel-oping advanced C3N4-based SACs is of great significance.In this review,we focus on elucidating efficient preparation strategies and the burgeoning photo-catalytic applications of C3N4-based SACs.We also outline prospective strategies for enhancing the performance of SACs and C3N4-based SACs in the future.A comprehensive array of methodologies is presented for identifying and char-acterizing C3N4-based SACs.This includes an exploration of potential atomic catalytic mechanisms through the simulation and regulation of atomic catalytic behaviors and the synergistic effects of single or multiple sites.Subsequently,a forward-looking perspective is adopted to contemplate the future prospects and challenges associated with C3N4-based SACs.This encompasses considerations,such as atomic loading,regulatory design,and the integration of machine learn-ing techniques.It is anticipated that this review will stimulate novel insights into the synthesis of high-load and durable SACs,thereby providing theoretical groundwork for scalable and controllable applications in the field.
