Rare earth molten salt electrolytic slag(RMES)has emerged as a promising secondary resource for rare earth elements(REEs).This study introduces an innovative leaching technique for extracting REEs from RMES under atmo...Rare earth molten salt electrolytic slag(RMES)has emerged as a promising secondary resource for rare earth elements(REEs).This study introduces an innovative leaching technique for extracting REEs from RMES under atmospheric conditions,employing an alkali phase reconstruction method followed by an acid leaching process.Additionally,the external electric field was employed to enhance the reaction.Under the optimal reaction conditions:NaOH initial concentration of 70 wt%,NaOH-slag mass ratio of 4:1,temperature of 160℃,current density of 1000 A/m^(2),reaction time of 90 min,stirring speed of 300 r/min,HCl concentration of 4 mol/L,liquid-solid ratio of 15:1,and leaching time of 20 min,the leaching efficiencies of Nd and Pr reach up to 99.21%and 99.14%,respectively.Phase analysis indicates that the rare earth fluorides transform into rare earth hydroxides,significantly enhancing their solubility in acid solution.The imposition of an external electric field leads to pronounced disruption of the RMES surface,thereby promoting the formation of stable reactive oxygen species in the alkaline medium.This facilitates the decomposition of fluorinated rare earths and hastens the phase reconstruction,resulting in an enhanced leaching process.The achieved leaching efficiency with an external electric field is 37%higher than that without an electric field.展开更多
Viewing the problem of high ene rgy consumption in the process of recovering rare earths from rare earth molten salt electrolysis slag,an environmentally friendly and low carbon process by sub-molten salt decompositio...Viewing the problem of high ene rgy consumption in the process of recovering rare earths from rare earth molten salt electrolysis slag,an environmentally friendly and low carbon process by sub-molten salt decomposition was developed.The thermodynamic analysis of sub-molten salt reaction indicates that the recovery of rare earths from the slag using sub-molten salt medium is thermodynamically feasible.In this process,the rare earth fluoride and lithium in the slag are almost transformed into rare earth hydroxide,sodium fluoride and lithium hydroxide,fluorine and lithium are transferred into the washing solution,and the rare earths in the residues can be leached into solution by acid leaching.Under the optimum reaction conditions of reaction temperature 200℃,reaction time 3 h,NaOH initial concentration 80%,NaOH-Slag mass ratio 3:1,the leaching efficiency of rare earths,fluorine and lithium can reach to 99.05%,98.23% and 99.22%.After evaporation,the fluorine and lithium in the washing solution can be obtained in the forms of sodium fluoride and lithium fluoride,the recovery efficiency reach 95.5%and 92.8%,respectively.The RE oxides(99.53%) can be obtained from the leaching solution after precipitation and roasting.展开更多
Inhibitors are important for flotation separation of quartz and feldspar.In this study,a novel combined inhibitor was used to separate quartz and feldspar in near-neutral pulp.Selective inhibition of the combined inhi...Inhibitors are important for flotation separation of quartz and feldspar.In this study,a novel combined inhibitor was used to separate quartz and feldspar in near-neutral pulp.Selective inhibition of the combined inhibitor was assessed by micro-flotation experiments.And a series of detection methods were used to detect differences in the surface properties of feldspars and quartz after flotation reagents and put forward the synergistic strengthening mechanism.The outcomes were pointed out that pre-mixing combined inhibitors were more effective than the addition of Ca^(2+)and SS in sequence under the optimal proportion of 1:5.A concentrate from artificial mixed minerals that was characterized by a high quartz grade and a high recovery was acquired,and was found to be 90.70wt% and 83.70%,respectively.It was demonstrated that the combined inhibitor selectively prevented the action of the collector and feldspar from Fourier-transform infrared(FT-IR)and adsorption capacity tests.The results of X-ray photoelectron spectroscopy(XPS)indicated that Ca^(2+)directly interacts with the surface of quartz to increase the adsorption of collectors.In contrast,the chemistry property of Al on the feldspar surface was altered by combined inhibitor due to Na^(+)and Ca^(2+)taking the place of K^(+),resulting in the composite inhibitor forms a hydrophilic structure,which prevents the adsorption of the collector on the surface of feldspar by interacting with the Al active site.The combination of Ca^(2+)and SS synergically strengthens the difference of collecting property between quartz and feldspar by collector,thus achieving the effect of efficient separation.A new strategy for flotation to separate quartz from feldspar in near-neutral pulp was provided.展开更多
Abnormal accumulation and metabolism of lipid droplets can lead to a variety of diseases.Polarity,a key parameter of the microenvironment,is closely associated with many diseases and dysfunctions in the body.It is imp...Abnormal accumulation and metabolism of lipid droplets can lead to a variety of diseases.Polarity,a key parameter of the microenvironment,is closely associated with many diseases and dysfunctions in the body.It is important to elucidate the relationship between the physiological activity of lipid droplets(LDs)and the polarity of the microenvironment.In this work,based on push-pull mechanism,a fluorescent probe(E)-3-(5-(4-(diphenylamino)phenyl)thiophen-2-yl)-1-(2-hydroxyphenyl)prop-2-en-1-one(PPTH)with aggregation-induced emission(AIE)properties for the detection of polarity changes in cells was synthesized.PPTH not only visualize intracellular polarity fluctuation of iron death and inflammation but also distinguish between normal and fatty liver tissue.展开更多
Based on 4-bromo-1,8-naphthalic anhydride,one novel ratiometric fluorescence H_(2)S-probe(IDNA)was designed and synthesized.Further studies indicate that IDNA can sensitively recognize H_(2)S(detection limit of 7 μmo...Based on 4-bromo-1,8-naphthalic anhydride,one novel ratiometric fluorescence H_(2)S-probe(IDNA)was designed and synthesized.Further studies indicate that IDNA can sensitively recognize H_(2)S(detection limit of 7 μmol/L)with good selectivity and anti-interference ability.In addition,IDNA has satisfactory photostability in HeLa cells,ability of mitochondrial co-localization,and can be utilized in fluorescence imaging of H_(2)S.展开更多
It is significant for cell physiology to keep the homeostasis of p H, and it is highly demanded to develop ratiometric fluorescent sensors toward p H. In this work, under mild condition, through the electrostatic inte...It is significant for cell physiology to keep the homeostasis of p H, and it is highly demanded to develop ratiometric fluorescent sensors toward p H. In this work, under mild condition, through the electrostatic interaction between carbon nanodots（CDs） and organic molecules, two novel ratiometric fluorescence hybrid nanosensors were fabricated for sensing acidic p H. These nanohybrid systems possess dual emission peaks at 455 and 527 nm under a single excitation wavelength of 380 nm in acidic p H condition.With the increasing of p H, the fluorescence of the 1,8-naphthalimide derivative completely quenches,while the blue fluorescence of CDs keeps constant. Furthermore, the CDsàorganic molecular nanohybrids exhibit excellent anti-disturbance ability, reversible p H sensing ability, and a linear response range in wide p H range respectively. Besides the ability to target lysosome, with one of the nanosensor, stimulated p H change has been successfully tracked in a ratiometric manner via fluorescence imaging.展开更多
A ratiometric fluorescent hybrid nanoprobe CDs-1 for arginine(Arg),exhibiting high sensitivity(the limit of detection,LOD,being 6.5×10^-8 mol/L) and excellent selectivity and anti-interference ability,was fabrica...A ratiometric fluorescent hybrid nanoprobe CDs-1 for arginine(Arg),exhibiting high sensitivity(the limit of detection,LOD,being 6.5×10^-8 mol/L) and excellent selectivity and anti-interference ability,was fabricated through fluorescence resonance energy transfer(FRET) and the electrostatic attraction between positively-charged hemicyanine molecules and negatively-charged carbon dots(CDs).Arg can be quantitatively detected in the concentration range from 6.0×10^-5 mol/L to 2.7×10^-4 mol/L.Further,due to its ability to target mitochondrion and low cytotoxicity,intracellular Arg was succes s fully tracked through ratiometric fluorescence imaging.展开更多
The normal operation of lysosome, mitochondria, Golgi apparatus and endoplasmic reticulum plays a significant role in maintaining cell homeostasis. Reflecting the state and function of lysosomes, viscosity is a pivota...The normal operation of lysosome, mitochondria, Golgi apparatus and endoplasmic reticulum plays a significant role in maintaining cell homeostasis. Reflecting the state and function of lysosomes, viscosity is a pivotal parameter to assess the stability of microenvironment. Herein, based on TICT mechanism,a new NIR pH-dependent fluorescent probe DCIC with push-pull electronic moiety was synthesized to identify the lysosomes viscosity. In viscous media, DCIC was highly sensitive to viscosity, fluorescence intensity increased by 180 times as viscosity increased from 1.0 cp to 438.4 cp. In addition, DCIC have high localization ability for lysosome, mitochondria, Golgi apparatus, and endoplasmic reticulum and can monitor lysosomal viscosity fluctuations with laser confocal microscopy.展开更多
Insects first began evolving hundreds of millions of years ago,and aided by gut microbes,they have been consuming hydrocarbon polymers ever since.Few man-made plastic polymers are chemically novel,so it is reasonable ...Insects first began evolving hundreds of millions of years ago,and aided by gut microbes,they have been consuming hydrocarbon polymers ever since.Few man-made plastic polymers are chemically novel,so it is reasonable that insect/microbe systems can be found or developed to degrade them rapidly.However,remediation of global plastic waste problems should involve more than just conversion into CO_(2).Some industryscale microbial enzymatic degradation of plastic polymers may yield valuable monomers,but the plastic waste starting material must be of uniform chemistry and clean.This adds cost to the process.Many insect species can be utilized for animal feed as well as human food.Some of these insects have the capability to degrade plastic polymers.However,valorizing plastic wastes by producing edible insects or useful frass has largely been overlooked.Here we assemble the current knowledge of plastic degradation rates by insects.In addition,we also show the first instance of insect degradation of polyurethane and the first identification and isolation of insect gut fungi as directly aiding insect degradation.展开更多
With the advent of the era of short video,people can receive more information easy to be read and understood in a short time.Meteorological communicators should seize this opportunity,dig out characteristics and make ...With the advent of the era of short video,people can receive more information easy to be read and understood in a short time.Meteorological communicators should seize this opportunity,dig out characteristics and make innovations.In this paper,the first award-winning excellent short weather video in Hubei Province is taken as an example,to analyze some characteristics of short weather video,and some innovative development strategies are proposed.展开更多
The simultaneous construction of two vicinal C—C bonds in a molecule remains a significant challenge.In this work,we disclose an electroreductive carboarylation of activated alkenes under mild,transition metal-free c...The simultaneous construction of two vicinal C—C bonds in a molecule remains a significant challenge.In this work,we disclose an electroreductive carboarylation of activated alkenes under mild,transition metal-free conditions.Utilizing readily available starting materials(electron-deficient aryl bromides,activated alkenes,and CO_(2)),this method demonstrates broad substrate scope and good functional group tolerance.Notably,this strategy enables the addition of two distinct electrophiles across an alkene in a highly chemo-and regioselective manner.展开更多
Viscosity and polarity are crucial microenvironmental parameters within cells,intimately linked to the physiological activities of organisms.We constructed and synthesized an innovative dual-functional fluorescent pro...Viscosity and polarity are crucial microenvironmental parameters within cells,intimately linked to the physiological activities of organisms.We constructed and synthesized an innovative dual-functional fluorescent probe,DHBP.In the green channel,the fluorescence signal notably intensifies with decreasing environmental polarity,while in the red channel,fluorescence signal amplification occurs due to the collaborative effects of viscosity and polarity,resulting in more pronounced changes.Additionally,DHBP demonstrates high sensitivity in detecting changes in polarity and viscosity induced by drug-induced inflammation in cells and mice.Importantly,DHBP has been effectively utilized to monitor alterations in viscosity and polarity in the liver injury induced by diabetes in vivo in mice and further employed to assess the therapeutic efficacy of drugs.Therefore,DHBP holds promise for advancing research on viscosity and polarity in future studies of physiological and pathological processes.展开更多
Hydrogen peroxide and polarity are closely related to many physiological activities and pathological processes.However,near-infrared fluorescent probes that are sensitive to both H_(2)O_(2)and polarity are still scarc...Hydrogen peroxide and polarity are closely related to many physiological activities and pathological processes.However,near-infrared fluorescent probes that are sensitive to both H_(2)O_(2)and polarity are still scarce.Herein,we developed the first dual-channel near-infrared fluorescent probe NBO,with an AIE effect,enabling simultaneous monitoring of H_(2)O_(2)and polarity.The probe presented high sensitivity,high selectivity,and low detection limit for H_(2)O_(2).It also had high sensitivity to polarity,independent of pH and viscosity,with large Stokes shifts,good photostability,and low cytotoxicity.Moreover,NBO was able to detect both endogenous and exogenous H_(2)O_(2)as well as polarity fluctuations in vivo as a method to effectively differentiate between cancer cells and normal cells.Importantly,it also could monitor the therapeutic effects of drugs in inflammation and iron-dead cells and mice.Based on NIR emission,NBO could be used as an imaging tool and a way to evaluate the therapeutic effect of drugs for inflammation and ferroptosis.展开更多
Dihydropyran(DHP)compounds are not only found in natural products and bioactive molecules,but also serve as important precursors in organic synthesis.Nonetheless,traditional methods for the construction of such compou...Dihydropyran(DHP)compounds are not only found in natural products and bioactive molecules,but also serve as important precursors in organic synthesis.Nonetheless,traditional methods for the construction of such compounds are usually limited to disubstituted DHPs.To address this synthetic challenge,reported here is an efficient electrochemical strategy toward the selenated and trifluoromethylated DHP compounds.The reaction proceeded smoothly under mild electrolysis conditions.The broad substrate scope(>50 examples)and scalable synthesis demonstrated the complexity-building potential of the strategy.Initial mechanistic studies reveal that cyclization may involve a radical process.This protocol may promote the further development of diversified synthesis of multi-substituted dihydropyran.展开更多
基金supported by the Natural Science Foundation of the Jiangxi Province(20224BAB204038)the Young Elite Scientists Sponsorship Program by CAST(2022QNRC001)+2 种基金the Ganzhou City Science and Technology Innovation Talent Project(2023CYZ26999)Jiangxi Provincial Key Laboratory of LowCarbon Processing and Utilization of Strategic Metal Mineral Resources(2023SSY01041)the Jiangxi Province Graduate Student Innovation Special Fund Project(YC2023-S642)。
文摘Rare earth molten salt electrolytic slag(RMES)has emerged as a promising secondary resource for rare earth elements(REEs).This study introduces an innovative leaching technique for extracting REEs from RMES under atmospheric conditions,employing an alkali phase reconstruction method followed by an acid leaching process.Additionally,the external electric field was employed to enhance the reaction.Under the optimal reaction conditions:NaOH initial concentration of 70 wt%,NaOH-slag mass ratio of 4:1,temperature of 160℃,current density of 1000 A/m^(2),reaction time of 90 min,stirring speed of 300 r/min,HCl concentration of 4 mol/L,liquid-solid ratio of 15:1,and leaching time of 20 min,the leaching efficiencies of Nd and Pr reach up to 99.21%and 99.14%,respectively.Phase analysis indicates that the rare earth fluorides transform into rare earth hydroxides,significantly enhancing their solubility in acid solution.The imposition of an external electric field leads to pronounced disruption of the RMES surface,thereby promoting the formation of stable reactive oxygen species in the alkaline medium.This facilitates the decomposition of fluorinated rare earths and hastens the phase reconstruction,resulting in an enhanced leaching process.The achieved leaching efficiency with an external electric field is 37%higher than that without an electric field.
基金Project supported by the National Key Research and Development Project (2018YFC1903400)the Jiangxi Province Graduate Student Innovation Special Fund Project (203200800389)+2 种基金the Natural Science Foundation of Jiangxi Province (20224BAB204038,20202BAB214014)the Young Elite Scientists Sponsorship Program by CAST (2022QNRC001)the Open Project of Guangxi Key Laboratory of Nonferrous Metals and Characteristic Materials Processing(2022GXYSOF11)。
文摘Viewing the problem of high ene rgy consumption in the process of recovering rare earths from rare earth molten salt electrolysis slag,an environmentally friendly and low carbon process by sub-molten salt decomposition was developed.The thermodynamic analysis of sub-molten salt reaction indicates that the recovery of rare earths from the slag using sub-molten salt medium is thermodynamically feasible.In this process,the rare earth fluoride and lithium in the slag are almost transformed into rare earth hydroxide,sodium fluoride and lithium hydroxide,fluorine and lithium are transferred into the washing solution,and the rare earths in the residues can be leached into solution by acid leaching.Under the optimum reaction conditions of reaction temperature 200℃,reaction time 3 h,NaOH initial concentration 80%,NaOH-Slag mass ratio 3:1,the leaching efficiency of rare earths,fluorine and lithium can reach to 99.05%,98.23% and 99.22%.After evaporation,the fluorine and lithium in the washing solution can be obtained in the forms of sodium fluoride and lithium fluoride,the recovery efficiency reach 95.5%and 92.8%,respectively.The RE oxides(99.53%) can be obtained from the leaching solution after precipitation and roasting.
基金the financial support from the National Key Research and Development Program of China(No.2018YFC1903403)Young Elite Scientists Sponsorship Program by CAST(No.2022QNRC001).
文摘Inhibitors are important for flotation separation of quartz and feldspar.In this study,a novel combined inhibitor was used to separate quartz and feldspar in near-neutral pulp.Selective inhibition of the combined inhibitor was assessed by micro-flotation experiments.And a series of detection methods were used to detect differences in the surface properties of feldspars and quartz after flotation reagents and put forward the synergistic strengthening mechanism.The outcomes were pointed out that pre-mixing combined inhibitors were more effective than the addition of Ca^(2+)and SS in sequence under the optimal proportion of 1:5.A concentrate from artificial mixed minerals that was characterized by a high quartz grade and a high recovery was acquired,and was found to be 90.70wt% and 83.70%,respectively.It was demonstrated that the combined inhibitor selectively prevented the action of the collector and feldspar from Fourier-transform infrared(FT-IR)and adsorption capacity tests.The results of X-ray photoelectron spectroscopy(XPS)indicated that Ca^(2+)directly interacts with the surface of quartz to increase the adsorption of collectors.In contrast,the chemistry property of Al on the feldspar surface was altered by combined inhibitor due to Na^(+)and Ca^(2+)taking the place of K^(+),resulting in the composite inhibitor forms a hydrophilic structure,which prevents the adsorption of the collector on the surface of feldspar by interacting with the Al active site.The combination of Ca^(2+)and SS synergically strengthens the difference of collecting property between quartz and feldspar by collector,thus achieving the effect of efficient separation.A new strategy for flotation to separate quartz from feldspar in near-neutral pulp was provided.
基金the financial supports from Scientific and Technological Key Project in Henan Province(No.22170015)National Natural Science Foundation of China(No.U1704161)+2 种基金Zhengzhou University(No.32211807)Henan Provincial Science and Technology Research Project(No.JC21253010)Basic Research Foundation of Shenzhen Science and Technology Innovation(No.JCYJ20190806144605441)。
文摘Abnormal accumulation and metabolism of lipid droplets can lead to a variety of diseases.Polarity,a key parameter of the microenvironment,is closely associated with many diseases and dysfunctions in the body.It is important to elucidate the relationship between the physiological activity of lipid droplets(LDs)and the polarity of the microenvironment.In this work,based on push-pull mechanism,a fluorescent probe(E)-3-(5-(4-(diphenylamino)phenyl)thiophen-2-yl)-1-(2-hydroxyphenyl)prop-2-en-1-one(PPTH)with aggregation-induced emission(AIE)properties for the detection of polarity changes in cells was synthesized.PPTH not only visualize intracellular polarity fluctuation of iron death and inflammation but also distinguish between normal and fatty liver tissue.
基金We are grateful for the financial supports from the National Natural Science Foundation of China(Nos.U1704161,U1504203,21601158)Zhengzhou University(No.32210431).
文摘Based on 4-bromo-1,8-naphthalic anhydride,one novel ratiometric fluorescence H_(2)S-probe(IDNA)was designed and synthesized.Further studies indicate that IDNA can sensitively recognize H_(2)S(detection limit of 7 μmol/L)with good selectivity and anti-interference ability.In addition,IDNA has satisfactory photostability in HeLa cells,ability of mitochondrial co-localization,and can be utilized in fluorescence imaging of H_(2)S.
基金supports from National Natural Science Foundation of China (Nos. 21601158, U1504203 and J1210060)Key Laboratory of Photochemical Conversion and Optoelectronic Materials and Zhengzhou University
文摘It is significant for cell physiology to keep the homeostasis of p H, and it is highly demanded to develop ratiometric fluorescent sensors toward p H. In this work, under mild condition, through the electrostatic interaction between carbon nanodots（CDs） and organic molecules, two novel ratiometric fluorescence hybrid nanosensors were fabricated for sensing acidic p H. These nanohybrid systems possess dual emission peaks at 455 and 527 nm under a single excitation wavelength of 380 nm in acidic p H condition.With the increasing of p H, the fluorescence of the 1,8-naphthalimide derivative completely quenches,while the blue fluorescence of CDs keeps constant. Furthermore, the CDsàorganic molecular nanohybrids exhibit excellent anti-disturbance ability, reversible p H sensing ability, and a linear response range in wide p H range respectively. Besides the ability to target lysosome, with one of the nanosensor, stimulated p H change has been successfully tracked in a ratiometric manner via fluorescence imaging.
基金National Natural Science Foundation of China(Nos.U1704161,U1504203,21601158)Zhengzhou University(No.32210431)for the financial supports。
文摘A ratiometric fluorescent hybrid nanoprobe CDs-1 for arginine(Arg),exhibiting high sensitivity(the limit of detection,LOD,being 6.5×10^-8 mol/L) and excellent selectivity and anti-interference ability,was fabricated through fluorescence resonance energy transfer(FRET) and the electrostatic attraction between positively-charged hemicyanine molecules and negatively-charged carbon dots(CDs).Arg can be quantitatively detected in the concentration range from 6.0×10^-5 mol/L to 2.7×10^-4 mol/L.Further,due to its ability to target mitochondrion and low cytotoxicity,intracellular Arg was succes s fully tracked through ratiometric fluorescence imaging.
基金financial supports from Scientific and Technological Key Project in Henan Province(No.22170015)National Natural Science Foundation of China(No.U1704161)+1 种基金Zhengzhou University(No.32211807)Henan Provincial Science and Technology Research Project(No.JC21253010)。
文摘The normal operation of lysosome, mitochondria, Golgi apparatus and endoplasmic reticulum plays a significant role in maintaining cell homeostasis. Reflecting the state and function of lysosomes, viscosity is a pivotal parameter to assess the stability of microenvironment. Herein, based on TICT mechanism,a new NIR pH-dependent fluorescent probe DCIC with push-pull electronic moiety was synthesized to identify the lysosomes viscosity. In viscous media, DCIC was highly sensitive to viscosity, fluorescence intensity increased by 180 times as viscosity increased from 1.0 cp to 438.4 cp. In addition, DCIC have high localization ability for lysosome, mitochondria, Golgi apparatus, and endoplasmic reticulum and can monitor lysosomal viscosity fluctuations with laser confocal microscopy.
基金Key Research Program of the Ministry of Sciences and Technology(Grant No.2017YFC0505101)of ChinaChinese Academy of Sciences,President’s International Fellowship Initiative(CAS-PIFI),Grant No.2019PC0011,2017PC0035+7 种基金Key Research Program of Frontier Sciences,CAS,Grant No.QYZDY-SSW-SMC014We thank the National Science Foundation of China(NSFC)for funding this work under the project codes Y4ZK111B01,41761144055,3181101433,41771063,31650410651,41761144055 and 31550110215We are thankful to Zhijia Gu,Key Laboratories for Plant Diversity and Biogeography of East China,Kunming Institute of Botany,Chinese Academy of Sciences for scanning electron microscopy.G.G.O.Dossa thanks China Postdoctoral Foundation Grant No.2017M613021the young international staff Chinese Academy of Sciences(CAS)president international fellowship initiative(PIFI)grants#2019FYB0001 and 2017PC0035Heng Gui would thank the CPSF-CAS Joint Foundation for Excellent Postdoctoral Fellows(Grant No.2017LH029)the China Postdoctoral Science Foundation(Grant No.2018M633435)the 2018 Yunnan Province Postdoctoral Science Research Foundation.Heng Gui would also like to thank the support from the Human Resources and Social Security Department of Yunnan Province,German Academic Exchange Service(DAAD)under the program:Research Stays for University Academics and Scientists,2018(Ref.No.91691203)the China Scholarship Council under the State Scholarship Fund(Ref.No.201804910259).
文摘Insects first began evolving hundreds of millions of years ago,and aided by gut microbes,they have been consuming hydrocarbon polymers ever since.Few man-made plastic polymers are chemically novel,so it is reasonable that insect/microbe systems can be found or developed to degrade them rapidly.However,remediation of global plastic waste problems should involve more than just conversion into CO_(2).Some industryscale microbial enzymatic degradation of plastic polymers may yield valuable monomers,but the plastic waste starting material must be of uniform chemistry and clean.This adds cost to the process.Many insect species can be utilized for animal feed as well as human food.Some of these insects have the capability to degrade plastic polymers.However,valorizing plastic wastes by producing edible insects or useful frass has largely been overlooked.Here we assemble the current knowledge of plastic degradation rates by insects.In addition,we also show the first instance of insect degradation of polyurethane and the first identification and isolation of insect gut fungi as directly aiding insect degradation.
文摘With the advent of the era of short video,people can receive more information easy to be read and understood in a short time.Meteorological communicators should seize this opportunity,dig out characteristics and make innovations.In this paper,the first award-winning excellent short weather video in Hubei Province is taken as an example,to analyze some characteristics of short weather video,and some innovative development strategies are proposed.
基金supported by the National Key R&D Program of China(2022YFA1505100,2021YFA1500104)National Natural Science Foundation of China(22031008,22201222)+1 种基金Science Foundation of Wuhan(2023020201020266,2020010601012192)Jiangxi Normal University Doctoral Research Initiation Fund Project(12017081,12022796).
文摘The simultaneous construction of two vicinal C—C bonds in a molecule remains a significant challenge.In this work,we disclose an electroreductive carboarylation of activated alkenes under mild,transition metal-free conditions.Utilizing readily available starting materials(electron-deficient aryl bromides,activated alkenes,and CO_(2)),this method demonstrates broad substrate scope and good functional group tolerance.Notably,this strategy enables the addition of two distinct electrophiles across an alkene in a highly chemo-and regioselective manner.
基金support from Scientific and Technological Key Project in Henan Province(22170015)National Natural Science Foundation of China(U1704161,22106061)+1 种基金Zhengzhou University(32211807)Henan Provincial Science and Technology Research Project(JC21253010).
文摘Viscosity and polarity are crucial microenvironmental parameters within cells,intimately linked to the physiological activities of organisms.We constructed and synthesized an innovative dual-functional fluorescent probe,DHBP.In the green channel,the fluorescence signal notably intensifies with decreasing environmental polarity,while in the red channel,fluorescence signal amplification occurs due to the collaborative effects of viscosity and polarity,resulting in more pronounced changes.Additionally,DHBP demonstrates high sensitivity in detecting changes in polarity and viscosity induced by drug-induced inflammation in cells and mice.Importantly,DHBP has been effectively utilized to monitor alterations in viscosity and polarity in the liver injury induced by diabetes in vivo in mice and further employed to assess the therapeutic efficacy of drugs.Therefore,DHBP holds promise for advancing research on viscosity and polarity in future studies of physiological and pathological processes.
基金support from Scientific and Technological Key Project in Henan Province(22170015)National Natural Science Foundation of China(U1704161,22106061)+1 种基金Zhengzhou University(32211807)Henan Provincial Science and Technology Research Project(JC21253010)。
文摘Hydrogen peroxide and polarity are closely related to many physiological activities and pathological processes.However,near-infrared fluorescent probes that are sensitive to both H_(2)O_(2)and polarity are still scarce.Herein,we developed the first dual-channel near-infrared fluorescent probe NBO,with an AIE effect,enabling simultaneous monitoring of H_(2)O_(2)and polarity.The probe presented high sensitivity,high selectivity,and low detection limit for H_(2)O_(2).It also had high sensitivity to polarity,independent of pH and viscosity,with large Stokes shifts,good photostability,and low cytotoxicity.Moreover,NBO was able to detect both endogenous and exogenous H_(2)O_(2)as well as polarity fluctuations in vivo as a method to effectively differentiate between cancer cells and normal cells.Importantly,it also could monitor the therapeutic effects of drugs in inflammation and iron-dead cells and mice.Based on NIR emission,NBO could be used as an imaging tool and a way to evaluate the therapeutic effect of drugs for inflammation and ferroptosis.
基金supported by the National Key R&D Program of China(2022YFA1505100,2021YFA1500100)the National Natural Science Foundation of China(22031008)+1 种基金the Fundamental Research Funds for the Central Universities(2042022rc0030,2042023kf0108,2042023kf1002)the Science Foundation of Wuhan(2020010601012192)。
文摘Dihydropyran(DHP)compounds are not only found in natural products and bioactive molecules,but also serve as important precursors in organic synthesis.Nonetheless,traditional methods for the construction of such compounds are usually limited to disubstituted DHPs.To address this synthetic challenge,reported here is an efficient electrochemical strategy toward the selenated and trifluoromethylated DHP compounds.The reaction proceeded smoothly under mild electrolysis conditions.The broad substrate scope(>50 examples)and scalable synthesis demonstrated the complexity-building potential of the strategy.Initial mechanistic studies reveal that cyclization may involve a radical process.This protocol may promote the further development of diversified synthesis of multi-substituted dihydropyran.
