Objective To investigate the effects of quercetin and X-ray on collagen synthesis of cultured human keloid-derived fibroblast and the mechanism.Methods Collagen synthesis of cultured human keloid and normal fibroblast...Objective To investigate the effects of quercetin and X-ray on collagen synthesis of cultured human keloid-derived fibroblast and the mechanism.Methods Collagen synthesis of cultured human keloid and normal fibroblasts were detected by hydroxyproline colorimetric analysis. Immunocytochemical staining was used to investigate collagen I and III expression. mRNA expression of collagen I and III, and transforming growth factor (TGF)-β1 were assayed by reverse transcription-polymerase chain reaction (RT-PCR) and real-time PCR. Results Quercetin inhibited the collagen synthesis of both keloid and normal fibroblasts in a dose-dependent manner. Immunocytochemical staining indicated that collagen I and III were down-regulated by quercetin and X-ray (P<0.05), particularly collagen I (P<0.05). mRNA expression of both collagen I and III in quercetin groups significantly decreased compared with that in control group (P<0.05), especially in the group treated with both quercetin and X-ray (P<0.01). mRNA level of TGF-β1 gene was down-regulated by quercertin (P<0.05). Conclusions Quercetin will probably be one of the new medicines which could effectively treat keloid. Quercetin combined with X-ray could reduce the dose of radiation.展开更多
Huajuhong(Exocarpium Citri grandis,ECG)is a traditional Chinese herbal medicine and has been used for the treatment of respiratory diseases for hundreds of years.Recently,ECG has been listed in a traditional Chinese m...Huajuhong(Exocarpium Citri grandis,ECG)is a traditional Chinese herbal medicine and has been used for the treatment of respiratory diseases for hundreds of years.Recently,ECG has been listed in a traditional Chinese medicine formula in the Guidelines for the Diagnosis and Treatment of Coronavirus Disease 2019(sixth edition)in China.To date,the effect and mechanism of ECG against respiratory diseases have not been systematically reviewed.In this paper,the researchers summarized the effects of ECG and its pharmacologically active compound naringin in functioning as an antitussive and expectorant,improving lung function,alleviating acute lung injury,attenuating pulmonary fibrosis,and enhancing antiviral immune response,so as to provide a reference for its clinical application in the prevention and treatment of multiple respiratory diseases,including coronavirus disease 2019.展开更多
Scanning electron microscope(SEM)metrology is critical in semiconductor manufacturing for patterning process quality assessment and monitoring.Besides feature width and feature-feature space dimension measurements fro...Scanning electron microscope(SEM)metrology is critical in semiconductor manufacturing for patterning process quality assessment and monitoring.Besides feature width and feature-feature space dimension measurements from critical dimension SEM(CDSEM)images,visual inspection of SEM image also offers rich information on the quality of patterning.However,visual inspection alone leaves considerable room of ambiguity regarding patterning quality.To narrow the room of ambiguity and to obtain more statistically quantitative information on patterning quality,SEM-image contours are often extracted to serve such purposes.From contours,important information such as critical dimension and resist sidewall angle at any location can be estimated.Those geometrical information can be used for optical proximity correction(OPC)model verification and lithography hotspot detection,etc.Classical contour extraction algorithms based on local information have insufficient capability in dealing with noisy and low contrast images.To achieve reliable contours from noisy and low contrast images,information beyond local should be made use of as much as possible.In this regard,deep convolutional neural network(DCNN)has proven its great capability,as manifested in various computer vision tasks.Taking the full advantages of this maturing technology,we have designed a DCNN network and applied it to the task of extracting contours from noisy and low contrast SEM images.It turns out that the model is capable of separating the resist top and bottom contours reliably.In addition,the model does not generate false contours,it also can suppress the generation of broken contours when ambiguous area for contour extraction is small and non-detrimental.With advanced image alignment algorithm with sub-pixel accuracy,contours from different exposure fields of same process condition can be superposed to estimate process variation band,furthermore,stochastic effect induced edge placement variation statistics can easily be inferred from the extracted contours.展开更多
Many skin diseases,such as atopic dermatitis(AD),are featured with the dysbiosis of skin microbiota.The clinically recommended options for AD treatments suffer from poor outcomes and high side-effects,leading to sever...Many skin diseases,such as atopic dermatitis(AD),are featured with the dysbiosis of skin microbiota.The clinically recommended options for AD treatments suffer from poor outcomes and high side-effects,leading to severe quality-of-life impairment.To deal with this long-term challenge,we develop a living bacterial formu-lation(Hy@Rm)that integrates skin symbiotic bacteria of Roseomonas mucosa with poly(vinyl pyrrolidone),poly(vinyl alcohol)and sodium alginate into a skin dressing by virtue of the Ca^(2+)-mediated cross-linking and the freezing-thawing(F-T)cycle method.Hy@Rm dressing creates a favorable condition to not only serve as extrinsic culture harbors but also as nutrient suppliers to support R.mucosa survival in the harsh microenvi-ronment of AD sites to defeat S.aureus,which predominantly colonizes AD skins as an indigenous pathogen,mainly through the secretion of sphingolipids metabolites by R.mucosa like a therapeutics bio-factory.Mean-while,this elaborately designed skin dressing could accelerate wound healing,normalize aberrant skin char-acters,recover skin barrier functions,alleviate AD-associated immune/inflammation responses,functioning like a combinational therapy.This study offers a promising means for the topical bacteria transplant to realize effective microbe biotherapy toward the skin diseases feature with microbe milieu disorders,including but not limited to AD disease.展开更多
Panax notoginseng saponins(PNS)are a class of effective ingredients in Notoginseng Radix et Rhizoma,a well-known herbal medicine called San-Qi in Chinese.After oral administration,PNS inevitably interacts with gut mic...Panax notoginseng saponins(PNS)are a class of effective ingredients in Notoginseng Radix et Rhizoma,a well-known herbal medicine called San-Qi in Chinese.After oral administration,PNS inevitably interacts with gut microbiota,and thus affect the pharmacokinetic profiles and pharmacological effects.To date,studies concering gut microbiota-mediated metabolism of PNS have not been reviewed systematically.Herein,we outline the metabolic profiles of Panax notoginseng saponins mediated by gut microbiota,as well as its role in the pharmacokinetics and pharmacodynamics on the basis of reported data.The metabolic pathways of primary saponins are proposed,and step-by-step deglycosylation is found to be the primary degradation pathways of PNS mediated by gut microbiota.Specific microorganisms and enzymes involved in the metabolic processes were summarized.Gut microbiota is deeply involved in the metabolism of PNS,affects the pharmacokinetic profiles,and produces a series of active metabolites.These metabolites were documented to play an essential role in the efficacy of the parent compounds.Future studies should focus on strengthening the real-world evidence,defining the interaction between gut microbiota and PNS,and developing the strategy for modulating gut microbiota to enhance the bioavailability and efficacy of PNS.These information would be useful for further research and clinical application of PNS.展开更多
A novel Uralic(U)-rich linear-hyperbranched mono-methoxy poly(ethylene glycol)-hyperbranched polyglycerol-graft-Uralic(mPEG-HPG-g-U)nanoparticle(NP)was prepared as drug carrier for antitumor methotrexate(MTX).Due to t...A novel Uralic(U)-rich linear-hyperbranched mono-methoxy poly(ethylene glycol)-hyperbranched polyglycerol-graft-Uralic(mPEG-HPG-g-U)nanoparticle(NP)was prepared as drug carrier for antitumor methotrexate(MTX).Due to the H-bond interaction of U with MTX and hydrophobic interaction,this NP exhibited high drug loading efficiency of up to 40%,which was significantly higher than that of traditional NPs based on U-absent copolymers(<15%).In addition,MTX-loaded mPEG-HPG-g-U NPs also demonstrated an acidity-accelerated drug release behavior.展开更多
The structure of parabolic condensers makes them susceptible to wind load because of their thin and large windward mirrors.In this paper,the wind pressure on a model of a condenser mirror(1:35)on multistorey flat roof...The structure of parabolic condensers makes them susceptible to wind load because of their thin and large windward mirrors.In this paper,the wind pressure on a model of a condenser mirror(1:35)on multistorey flat roofs is analysed via pressure measurement in a wind tunnel.The mean wind-pressure distribution law of flat-roof condenser mirrors(including the change law with working conditions and the maximum distribution characteristics)and the distribution law of fluctuating and extreme wind pressure are obtained.Furthermore,by comparison with the ground-based condenser distribution law,similarities and differences between the two are obtained.Research results show that the wind-pressure distribution law of flat-roof parabolic condenser mirrors is the same as those on the ground,but the mean wind-pressure coefficient(absolute value)is generally~30%smaller.Furthermore,the maximum effect is generally located at the windward mirror edge and the mirror is more susceptible to wind pressure in wind directions of 30°and 135°-150°.The results of this study can provide a theoretical reference for wind-resistant structure design and multistorey flat-roof condenser-related research.展开更多
In this paper,the mechanisms of material removal in chemical mechanical polishing(CMP)processes are investigated in detail by the smoothed particle hydrodynamics(SPH)method.The feature-scale behaviours of slurry flow,...In this paper,the mechanisms of material removal in chemical mechanical polishing(CMP)processes are investigated in detail by the smoothed particle hydrodynamics(SPH)method.The feature-scale behaviours of slurry flow,rough pad,wafer defects,moving solid boundaries,slurry-abrasive interactions,and abrasive collisions are modelled and simulated.Compared with previous work on CMP simulations,our simulations incorporate more realistic physical aspects of the CMP process,especially the effect of abrasive concentration in the slurry flows.The preliminary results on slurry flow in CMP provide microscopic insights on the experimental data of the relation between the removal rate and abrasive concentration and demonstrate that SPH is a suitable method for the research of CMP processes.展开更多
This paper aims to explore RLC equivalent circuit synthesis method forreduced-order models of interconnect circuits obtained by Krylov subspace basedmodel order reduction (MOR) methods. To guarantee pure RLC equivalen...This paper aims to explore RLC equivalent circuit synthesis method forreduced-order models of interconnect circuits obtained by Krylov subspace basedmodel order reduction (MOR) methods. To guarantee pure RLC equivalent circuitscan be synthesized, both the structures of input and output incidence matrices and theblock structure of the circuit matrices should be preserved in the reduced-order models.Block structure preserving MOR methods have been well established. In this paper,we propose an embeddable Input-Output structure Preserving Order Reduction(IOPOR) technique to further preserve the structures of input and output incidencematrices. By combining block structure preserving MOR methods and IOPOR technique,we develop an RLC equivalent circuit synthesis method RLCSYN (RLC SYNthesis).Inline diagonalization and regularization techniques are specifically proposedto enhance the robustness of inductance synthesis. The pure RLC model, high modelingaccuracy, passivity guaranteed property and SPICE simulation robustness makeRLCSYN more applicable in interconnect analysis, either for digital IC design ormixedsignal IC simulation.展开更多
Here,a methacrylate-modified pyridone derivative(mPYR)was loaded into a porphyrin nanoscale metal-organic framework(porphyrin-nMOF).Then,the loaded mPYR was further polymerized to obtain poly-pyridone(poly-mPYR)to for...Here,a methacrylate-modified pyridone derivative(mPYR)was loaded into a porphyrin nanoscale metal-organic framework(porphyrin-nMOF).Then,the loaded mPYR was further polymerized to obtain poly-pyridone(poly-mPYR)to form poly-mPYR loaded porphyrin-nMOF,which is designated as PLP and used as a reservoir of singlet oxygen(^(1)O_(2)).It was found that PLP could quickly capture^(1)O_(2)in vitro and slowly release^(1)O_(2)in vivo to induce cancer cell death.The release of^(1)O_(2)was light and oxygen independent,and the entire process did not cause intracellular oxygen consumption.PLP also displayed good therapeutic effect in the treatment of both solid tumor and lung metastasis cancer.This strategy of oxygenand light-independent^(1)O_(2)treatment presents great potential for treating refractory cancer.Also,the form of^(1)O_(2)capturing polymer-loaded nMOF expands the biomedical applications of MOFs and polymers,which can be used as a platform for biomedical applications.展开更多
Despite the efficiency of trajectory piecewise-linear(TPWL)model order re-duction(MOR)for nonlinear circuits,it needs large amount of expansion points forlarge-scale nonlinear circuits.This will inevitably increase th...Despite the efficiency of trajectory piecewise-linear(TPWL)model order re-duction(MOR)for nonlinear circuits,it needs large amount of expansion points forlarge-scale nonlinear circuits.This will inevitably increase the model size as well as the simulation time of the resulting reduced macromodels.In this paper,subspaceTPWL-MOR approach is developed for the model order reduction of nonlinear cir-cuits.By breaking the high-dimensional state space into several subspaces with much lower dimensions,the subspace TPWL-MOR has very promising advantages of re-ducing the number of expansion points as well as increasing the effective region of thereduced-order model in the state space.As a result,the model size and the accuracy of the TWPL model can be greatly improved.The numerical results have shown dra-matic reduction in the model size as well as the improvement in accuracy by using the subspace TPWL-MOR compared with the conventional TPWL-MOR approach.展开更多
文摘Objective To investigate the effects of quercetin and X-ray on collagen synthesis of cultured human keloid-derived fibroblast and the mechanism.Methods Collagen synthesis of cultured human keloid and normal fibroblasts were detected by hydroxyproline colorimetric analysis. Immunocytochemical staining was used to investigate collagen I and III expression. mRNA expression of collagen I and III, and transforming growth factor (TGF)-β1 were assayed by reverse transcription-polymerase chain reaction (RT-PCR) and real-time PCR. Results Quercetin inhibited the collagen synthesis of both keloid and normal fibroblasts in a dose-dependent manner. Immunocytochemical staining indicated that collagen I and III were down-regulated by quercetin and X-ray (P<0.05), particularly collagen I (P<0.05). mRNA expression of both collagen I and III in quercetin groups significantly decreased compared with that in control group (P<0.05), especially in the group treated with both quercetin and X-ray (P<0.01). mRNA level of TGF-β1 gene was down-regulated by quercertin (P<0.05). Conclusions Quercetin will probably be one of the new medicines which could effectively treat keloid. Quercetin combined with X-ray could reduce the dose of radiation.
基金Science and Technology Planning Project of Guangdong Province in China(2018A030313491,2019B090905002).
文摘Huajuhong(Exocarpium Citri grandis,ECG)is a traditional Chinese herbal medicine and has been used for the treatment of respiratory diseases for hundreds of years.Recently,ECG has been listed in a traditional Chinese medicine formula in the Guidelines for the Diagnosis and Treatment of Coronavirus Disease 2019(sixth edition)in China.To date,the effect and mechanism of ECG against respiratory diseases have not been systematically reviewed.In this paper,the researchers summarized the effects of ECG and its pharmacologically active compound naringin in functioning as an antitussive and expectorant,improving lung function,alleviating acute lung injury,attenuating pulmonary fibrosis,and enhancing antiviral immune response,so as to provide a reference for its clinical application in the prevention and treatment of multiple respiratory diseases,including coronavirus disease 2019.
文摘Scanning electron microscope(SEM)metrology is critical in semiconductor manufacturing for patterning process quality assessment and monitoring.Besides feature width and feature-feature space dimension measurements from critical dimension SEM(CDSEM)images,visual inspection of SEM image also offers rich information on the quality of patterning.However,visual inspection alone leaves considerable room of ambiguity regarding patterning quality.To narrow the room of ambiguity and to obtain more statistically quantitative information on patterning quality,SEM-image contours are often extracted to serve such purposes.From contours,important information such as critical dimension and resist sidewall angle at any location can be estimated.Those geometrical information can be used for optical proximity correction(OPC)model verification and lithography hotspot detection,etc.Classical contour extraction algorithms based on local information have insufficient capability in dealing with noisy and low contrast images.To achieve reliable contours from noisy and low contrast images,information beyond local should be made use of as much as possible.In this regard,deep convolutional neural network(DCNN)has proven its great capability,as manifested in various computer vision tasks.Taking the full advantages of this maturing technology,we have designed a DCNN network and applied it to the task of extracting contours from noisy and low contrast SEM images.It turns out that the model is capable of separating the resist top and bottom contours reliably.In addition,the model does not generate false contours,it also can suppress the generation of broken contours when ambiguous area for contour extraction is small and non-detrimental.With advanced image alignment algorithm with sub-pixel accuracy,contours from different exposure fields of same process condition can be superposed to estimate process variation band,furthermore,stochastic effect induced edge placement variation statistics can easily be inferred from the extracted contours.
基金National Natural Science Foundation of China(52131302,51973164,22135005 and 51833007)Fundamental Research Funds for the Central Universities(2042021kf0037)+1 种基金All of the animal experiments were conducted under protocols(AUP,WP20210510)Institutional Animal Care and Use Committee(IACUC)of the Animal Experiment Center of Wuhan University(Wuhan,China).
文摘Many skin diseases,such as atopic dermatitis(AD),are featured with the dysbiosis of skin microbiota.The clinically recommended options for AD treatments suffer from poor outcomes and high side-effects,leading to severe quality-of-life impairment.To deal with this long-term challenge,we develop a living bacterial formu-lation(Hy@Rm)that integrates skin symbiotic bacteria of Roseomonas mucosa with poly(vinyl pyrrolidone),poly(vinyl alcohol)and sodium alginate into a skin dressing by virtue of the Ca^(2+)-mediated cross-linking and the freezing-thawing(F-T)cycle method.Hy@Rm dressing creates a favorable condition to not only serve as extrinsic culture harbors but also as nutrient suppliers to support R.mucosa survival in the harsh microenvi-ronment of AD sites to defeat S.aureus,which predominantly colonizes AD skins as an indigenous pathogen,mainly through the secretion of sphingolipids metabolites by R.mucosa like a therapeutics bio-factory.Mean-while,this elaborately designed skin dressing could accelerate wound healing,normalize aberrant skin char-acters,recover skin barrier functions,alleviate AD-associated immune/inflammation responses,functioning like a combinational therapy.This study offers a promising means for the topical bacteria transplant to realize effective microbe biotherapy toward the skin diseases feature with microbe milieu disorders,including but not limited to AD disease.
基金supported by Guangdong Basic and Applied Basic Research Foundation(No.2022A1515012039)Guangzhou Science and Technology Plan Project(No.2024A03J0360).
文摘Panax notoginseng saponins(PNS)are a class of effective ingredients in Notoginseng Radix et Rhizoma,a well-known herbal medicine called San-Qi in Chinese.After oral administration,PNS inevitably interacts with gut microbiota,and thus affect the pharmacokinetic profiles and pharmacological effects.To date,studies concering gut microbiota-mediated metabolism of PNS have not been reviewed systematically.Herein,we outline the metabolic profiles of Panax notoginseng saponins mediated by gut microbiota,as well as its role in the pharmacokinetics and pharmacodynamics on the basis of reported data.The metabolic pathways of primary saponins are proposed,and step-by-step deglycosylation is found to be the primary degradation pathways of PNS mediated by gut microbiota.Specific microorganisms and enzymes involved in the metabolic processes were summarized.Gut microbiota is deeply involved in the metabolism of PNS,affects the pharmacokinetic profiles,and produces a series of active metabolites.These metabolites were documented to play an essential role in the efficacy of the parent compounds.Future studies should focus on strengthening the real-world evidence,defining the interaction between gut microbiota and PNS,and developing the strategy for modulating gut microbiota to enhance the bioavailability and efficacy of PNS.These information would be useful for further research and clinical application of PNS.
基金the National Natural Science Foundation of China(51873158,51573141,91833304 and 91433201)the National Key R&D Program of China(2016YFB0401002)+4 种基金Shenzhen Science and Technolgy Program(KQTD20170330110107046 and JCYJ20190808151209557)the Key Technological Innovation Program of Hubei Province(2018AAA013)the Natural Science Foundation for Distinguished Young Scholars of Hubei Province(2017CFA033)the support from the Ministry of Science and Technology of Taiwan(MOST 107-2221-E-002-160-MY3 and 108-2221-E-002-148-MY3)the post-doctoral fellowship from the Ministry of Education(MOE)of Taiwan。
基金This work was supported by the National Key Basic Research Program of China(2011CB606202)National Natural Science Foundation of China(Grant Nos.21374085,21174110 and 51303137)the Fundamental Research Funds for the Central Universities(2042014kf0193).
文摘A novel Uralic(U)-rich linear-hyperbranched mono-methoxy poly(ethylene glycol)-hyperbranched polyglycerol-graft-Uralic(mPEG-HPG-g-U)nanoparticle(NP)was prepared as drug carrier for antitumor methotrexate(MTX).Due to the H-bond interaction of U with MTX and hydrophobic interaction,this NP exhibited high drug loading efficiency of up to 40%,which was significantly higher than that of traditional NPs based on U-absent copolymers(<15%).In addition,MTX-loaded mPEG-HPG-g-U NPs also demonstrated an acidity-accelerated drug release behavior.
基金supported by National Natural Science Foundation of China(grant number:51708478)the Natural Science Foundation of Hunan province(grant number:2020JJ5549)the State Key Laboratory of Marine Resource Utilization in South China Sea(MRUKF2021028).
文摘The structure of parabolic condensers makes them susceptible to wind load because of their thin and large windward mirrors.In this paper,the wind pressure on a model of a condenser mirror(1:35)on multistorey flat roofs is analysed via pressure measurement in a wind tunnel.The mean wind-pressure distribution law of flat-roof condenser mirrors(including the change law with working conditions and the maximum distribution characteristics)and the distribution law of fluctuating and extreme wind pressure are obtained.Furthermore,by comparison with the ground-based condenser distribution law,similarities and differences between the two are obtained.Research results show that the wind-pressure distribution law of flat-roof parabolic condenser mirrors is the same as those on the ground,but the mean wind-pressure coefficient(absolute value)is generally~30%smaller.Furthermore,the maximum effect is generally located at the windward mirror edge and the mirror is more susceptible to wind pressure in wind directions of 30°and 135°-150°.The results of this study can provide a theoretical reference for wind-resistant structure design and multistorey flat-roof condenser-related research.
基金D.W.,C.Y.and X.Z.were partially supported by National Natural Science Foundation of China(Nos.61125401,61376040,61228401,61274032)the National Basic Research Program of China(No.2011CB309701)+8 种基金the National Major Science and Technology Special Project of China(Nos.2011ZX01035-001-001-003,2014ZX02301002-002)Shanghai Science and Technology Committee project(No.13XD1401100)the State Key Laboratory of ASIC and System(Fudan University)research project(No.11MS013).S.S.was partially supported by the National Natural Science Foundation of China(Nos.11101011,91330110)the Specialized Research Fund for the Doctoral Program of Higher Education(No.20110001120112)the State Key Laboratory of ASIC and System(Fudan University)open research project(No.10KF015)W.C.was partially supported by the US Army Office of Research(No.W911NF-11-1-0364)the National Science Foundation of USA(No.DMS-1315128)the National Natural Science Foundation of China(No.91330110).
文摘In this paper,the mechanisms of material removal in chemical mechanical polishing(CMP)processes are investigated in detail by the smoothed particle hydrodynamics(SPH)method.The feature-scale behaviours of slurry flow,rough pad,wafer defects,moving solid boundaries,slurry-abrasive interactions,and abrasive collisions are modelled and simulated.Compared with previous work on CMP simulations,our simulations incorporate more realistic physical aspects of the CMP process,especially the effect of abrasive concentration in the slurry flows.The preliminary results on slurry flow in CMP provide microscopic insights on the experimental data of the relation between the removal rate and abrasive concentration and demonstrate that SPH is a suitable method for the research of CMP processes.
基金NSFC research project 90307017 and 60676018partly by the National Basic Research Program of China under the grant 2005CB321701+2 种基金partly by Cross-Century Outstanding Scholar’s fund of Ministry of Education of China,partly by the doctoral program foundation of Ministry of Education of China 20050246082partly by Shanghai Dawn Project 200601partly by the National Science Foundation(NSF)under Grant CCR-0306298.
文摘This paper aims to explore RLC equivalent circuit synthesis method forreduced-order models of interconnect circuits obtained by Krylov subspace basedmodel order reduction (MOR) methods. To guarantee pure RLC equivalent circuitscan be synthesized, both the structures of input and output incidence matrices and theblock structure of the circuit matrices should be preserved in the reduced-order models.Block structure preserving MOR methods have been well established. In this paper,we propose an embeddable Input-Output structure Preserving Order Reduction(IOPOR) technique to further preserve the structures of input and output incidencematrices. By combining block structure preserving MOR methods and IOPOR technique,we develop an RLC equivalent circuit synthesis method RLCSYN (RLC SYNthesis).Inline diagonalization and regularization techniques are specifically proposedto enhance the robustness of inductance synthesis. The pure RLC model, high modelingaccuracy, passivity guaranteed property and SPICE simulation robustness makeRLCSYN more applicable in interconnect analysis, either for digital IC design ormixedsignal IC simulation.
基金This study was supported by the National Natural Science Foundation of China(nos.51833007,51873162,21721005,and 51690152).
文摘Here,a methacrylate-modified pyridone derivative(mPYR)was loaded into a porphyrin nanoscale metal-organic framework(porphyrin-nMOF).Then,the loaded mPYR was further polymerized to obtain poly-pyridone(poly-mPYR)to form poly-mPYR loaded porphyrin-nMOF,which is designated as PLP and used as a reservoir of singlet oxygen(^(1)O_(2)).It was found that PLP could quickly capture^(1)O_(2)in vitro and slowly release^(1)O_(2)in vivo to induce cancer cell death.The release of^(1)O_(2)was light and oxygen independent,and the entire process did not cause intracellular oxygen consumption.PLP also displayed good therapeutic effect in the treatment of both solid tumor and lung metastasis cancer.This strategy of oxygenand light-independent^(1)O_(2)treatment presents great potential for treating refractory cancer.Also,the form of^(1)O_(2)capturing polymer-loaded nMOF expands the biomedical applications of MOFs and polymers,which can be used as a platform for biomedical applications.
文摘Despite the efficiency of trajectory piecewise-linear(TPWL)model order re-duction(MOR)for nonlinear circuits,it needs large amount of expansion points forlarge-scale nonlinear circuits.This will inevitably increase the model size as well as the simulation time of the resulting reduced macromodels.In this paper,subspaceTPWL-MOR approach is developed for the model order reduction of nonlinear cir-cuits.By breaking the high-dimensional state space into several subspaces with much lower dimensions,the subspace TPWL-MOR has very promising advantages of re-ducing the number of expansion points as well as increasing the effective region of thereduced-order model in the state space.As a result,the model size and the accuracy of the TWPL model can be greatly improved.The numerical results have shown dra-matic reduction in the model size as well as the improvement in accuracy by using the subspace TPWL-MOR compared with the conventional TPWL-MOR approach.