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Foldable-circuit-enabled miniaturized multifunctional sensor for smart digital dust

Chip 2022年第4期1卷 82-89页

作者： Chun-Yu You Bo-Fan Hu Bo-Rui Xu Zi-Yu Zhang Bin-Min Wu Gao-Shan Huang En-Ming Song Yong-Feng Mei department of Materials Science&State Key Laboratory of Molecular engi-neering of Polymers Fudan UniversityShanghai 200438People’s Republic of China Shanghai Frontiers Science Research Base of Intelligent Optoelec-tronics and Perception Institute of OptoelectronicsFudan UniversityShang-hai 200438People’s Republic of China International Institute of Intelligent Nanorobots and Nanosystems Fudan UniversityShanghai 200438People’s Republic of China Yiwu Research Institute of Fudan University Yiwu 322000ZhejiangPeople’s Republic of China

Smart dust,which refers to miniaturized,multifunctional sensor motes,would open up data acquisition opportunities for Internet of Things(IoT)and Environmental protection ***,critical obstacles remain challenging in the integration of high-density sensors,further miniaturization of device platforms,and reduction of ***,we demonstrate the concept of smart digital dust to address these problems,the results of which combine the benefit of(i)maturity of complementary metal-oxide semiconductor(CMOS)processing approaches and(ii)unique form factors of emerging flex-ible *** a prototype for smart digital dust,we present a millimeter-scale multifunctional optoelectronic sensor platform con-sisting of high-performance optoelectronic sensor cores and commer-cially available integrated-circuit *** smart material-assisted optoelectronic sensing mechanism enables real-time,high-sensitivity hydrogen,temperature,and relative humidity(RH)sens-ing based on a single chip with ultralow power *** a microsystem presented here introduces a viable solution to the multi-functional sensing need of IoT and could serve as a building block for the rapidly evolving future framework of smart dust.

关键词： Smart dust Flexible electronics Nanomembrane devices Multifunctional sensors

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Preparation of porous chitosan-poly(acrylic acid)-calcium phosphate hybrid nanoparticles via mineralization

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Chinese Science Bulletin 2009年第10期54卷 3127-3136页

作者： CHEN ChangJing DENG Yu YAN ErYun HU Yong JIANG XiQun Nanjing National Laboratory of Microstructures Department of Material Science and Engineering Nanjing University Nanjing 210093 China Laboratory of Mesoscopic Chemistry and department of Polymer Science & engineering College of Chemistry & Chemical Engi- neering Nanjing University Nanjing 210093 China Center for Materials Analysis Nanjing University Nanjing 210093 China

In this work, the preparation of chitosan-poly(acrylic acid)-calcium phosphate hybrid nanoparticles (CS-PAA-CaP NP) based on the mineralization of calcium phosphate (CaP) on the surface of chito-san-poly (acrylic acid) nanoparticles (CS-PAA NPs) was reported. CS-PAA-CaP NPs were achieved by directly adding ammonia to the aqueous solution of CS-PAA nanoparticles or by thermal decomposi-tion of urea in the aqueous solution of CS-PAA nanoparticles, resulting in the mineralization of CaP on the surface of CS-PAA NPs. Through these two routes, especially using urea as a pH-regulator, the precipitation of CS-PAA NPs, a common occurrence in basic environment, was avoided. The size, morphology and ingredient of CS-PAA-CaP hybrid nanoparticles were characterized by dynamic light scattering (DLS), transmission electron microscope (TEM), scanning electron microscope (SEM), thermogravimetry analysis (TGA) and X-ray diffractometer (XRD). When urea was used as the pH regulator to facilitate the mineralization during the thermal urea decomposition procedure, regular CS-PAA-CaP hybrid nanoparticles with a porosity-structural CaP shells and 400―600 nm size were obtained. TGA result revealed that the hybrid NPs contained approximately 23% inorganic component, which was consistent with the ratio of starting materials. The XRD spectra of hybrid nanoparticles in-dicated that dicalcium phosphate (DCP: CaHPO4) crystal was a dominant component of mineralization. The porous structure of the CS-PAA-CaP hybrid NPs might be greatly useful in pharmaceutical and other medical applications.

关键词：纳米粒子丙烯酸壳聚糖磷酸钙多孔制备混合矿化

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Vlodeling information exchange between living and artificial cells

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Frontiers of Electrical and Electronic engineering in China 2017年第1期5卷 76-89页

作者： Keith C.Heyde Mary Joe K. Rice Sung-Ho Paek Felicia Y. Scott Ruihua Zhang Warren C. Ruder department of mechanical engineering Carnegie Mellon University Pittsburgh PA 15213 USA department of mechanical engineering Virginia Polytechnic Institute and State University Blacksburg VA 24061 USA department of Biological Systems engi-neering Virginia Polytechnic Institute and State University Black sburg VA 24061 USA department of Bioengineering University of Pittsburgh Pittsburgh PA 15219 USA

Background： The tools of synthetic biology have enabled researchers to explore multiple scientific phenomena by directly engineering signaling pathways within living cells and artificial protoeells. Here, we explored the potential for engineered living cells themselves to assemble signafing pathways for non-living protocells. This analysis serves as a preliminary investigation into a potential origin of processes that may be utilized by complex living systems. Specifically, we suggest that if living cells can be engineered to direct the assembly of genetic signaling pathways from genetic biomaterials in their environment, then insight can be gained into how naturally occurring living systems might behave similarly. Methods： To this end, we have modeled and simulated a system consisting of engineered cells that control the assembly of DNA monomers on microparticle scaffolds. These DNA monomers encode genetic circuits, and therefore, these microparticles can then be encapsulated with minimal transcription and translation systems to direct protocell phenotype. The modeled system relies on multiple previously established synthetic systems and then links these together to demonstrate system feasibility. Results： In this specific model, engineered cells are induced to synthesize biotin, which competes with biotinylated, circuit-encoding DNA monomers for an avidinized-microparticle scaffold. We demonstrate that multiple synthetic motifs can be controlled in this way and can be tuned by manipulating parameters such as inducer and DNA concentrations. Conclusions： We expect that this system will provide insight into the origin of living systems as well as serve as a tool for engineering living cells that assemble complex biomaterials in their environment.

关键词： synthetic biology artificial cells biotin microparticles

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Synergistic defensive mechanism of phytochelatins and antioxidative enzymes in Brassica chinensis L. against Cd stress

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Chinese Science Bulletin 2008年第10期53卷 1503-1511页

作者： CHEN LiQin GUO YiFei YANG LiMin WANG QiuQuan department of Chemistry and the MOE Key Laboratory of Modern Analytical Science College of Chemistry and Chemical Engi- neering Xiamen University Xiamen 361005 China State Key Laboratory of Marine Environmental Science Xiamen University Xiamen 361005 China

Brassica chinensis L. was chosen and exposed to different concentrations of Cd exposure to evaluate its Cd-accumulating capacity and its potential cellular defensive mechanisms. Cd accumulation in the shoots and roots of B. chinensis was up to 1348.3±461.8 and 3761.0±795.0 mg per killogram of dry weight, respectively, under 200 μmol/L of Cd exposure. Increasing Cd accumulation in the plant was accompanied by rapid accumulation of phytochelatins (PCs), and the sequestration of Cd by PCs provided a primary cellular mechanism for Cd detoxification and tolerance of B. chinensis. Furthermore, malondialdehyde formation, hydrogen peroxide content and antioxidative enzyme activities such as superoxide dismutase, catalase, guaiacol peroxidase and ascorbate peroxidase were observed in the shoots of Cd-stressed B. chinensis. Increasing enzyme activities in response to concentrations of 5 to 50 μmol/L Cd showed an efficient defense against oxidative stress, suggesting that the antioxidative system was a secondary defensive mechanism. These resulted in reduced free Cd damage and enhanced Cd accumulation and tolerance. Glutathione plays a pivotal role in these two detoxification pathways. In general, these results suggested that PCs and the antioxidative system are synergistic in combatting Cd-induced oxidative stress and that they play important roles in Cd detoxification of B. chinensis, and also give a deep understanding of the natural defensive mechanisms in plants under heavy metal stress.

关键词：镉芸苔植物化学酶类

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Progress in research on ultrasound radiomics for predicting the prognosis of breast cancer

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Cancer Innovation 2023年第4期2卷 283-289页

作者： Xuantong Gong Xuefeng Liu Xiaozheng Xie Yong Wang department of Ultrasound National Cancer Center/National Clinical Research Center for Cancer/Cancer HospitalChinese Academy of Medical Sciences and Peking Union Medical CollegeBijingChina State Key Laboratory of Virtual Reality Technology and Systems School of Computer Science and EngineeringBejjing Advanced Innovation Center for Big Data and Brain Computing(BDBC)Beihang UniversityBeijingChina School of Computer and Communication engi neering.University of Science and Technology Beijing BeijingChina

Breast cancer is the most common malignant tumor and the leading cause of cancer-related deaths in women *** means of predicting the prognosis of breast cancer are very helpful in guiding treatment and improving patients'*** extracted by radiomics reflect the genetic and molecular characteristics of a tumor and are related to its biological behavior and the patient's ***,radiomics provides a new approach to noninvasive assessment of breast cancer *** is one of the commonest clinical means of examining breast *** recent years,some results of research into ultrasound radiomics for diagnosing breast cancer,predicting lymph node status,treatment response,recurrence and survival times,and other aspects,have been *** this article,we review the current research status and technical challenges of ultrasound radiomics for predicting breast cancer *** aim to provide a reference for radiomics researchers,promote the development of ultrasound radiomics,and advance its clinical application.

关键词： breast cancer deeplearning prognosisprediction radiomics ultrasound

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Sign series entropy analysis of short-term heart rate variability

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Chinese Science Bulletin 2009年第24期54卷 4610-4615页

作者： BIAN ChunHua MA QianLi SI JunFeng WU XuHui SHAO Jun NING XinBao WANG DongJin Key Laboratory of Modern Acoustics Institute for Biomedical Electronic Engineering Department of Electronic Science and Engi- neering Nanjing University Nanjing 210093 China College of Geography and Biological Information Nanjing University of Posts and Telecommunications Nanjing 210003 China The Affiliated Drumtower Hospital of Nanjing University Medical School Nanjing 210008 China

Complexity and nonlinearity approaches can be used to study the temporal and structural order in heart rate variability (HRV) signal, which is helpful for understanding the underlying rule and physiological essence of cardiovascular regulation. For clinical applications, methods suitable for short-term HRV analysis are more valuable. In this paper, sign series entropy analysis (SSEA) is proposed to characterize the feature of direction variation of HRV. The results show that SSEA method can detect sensitively physiological and pathological changes from short-term HRV signals, and the method also shows its robustness to nonstationarity and noise. Thus, it is suggested as an efficient way for the analysis of clinical HRV and other complex physiological signals.

关键词：心率变异性变异性分析熵分析短期临床应用抗原检测非线性方法心血管调节

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Characterization of the amino-terminal domain of Mx2/MxB-dependent interaction with the HIV-1 capsid

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Protein & Cell 2014年第12期5卷 954-957页

作者： Jia Kong School of Life Science Tianjin University Tianjin 300072 China Collaborative Innovation Center of Chemical Science and engi- neering Tianjin 300072 China department of Molecular Microbiology and Immunology Johns Hopkins Bloomberg School of Public Health Baltimore MD 21205 USA Institute of Virology and AIDS Research First Hospital of JilinUniversity Changchun 130061 China

Dear Editor More than 50 years have passed since the myxovirus resis- tance （MX） genes were first discovered and found to suppress infection with influenza viruses in mice （Lindenmann, 1962）. Like most mammals, mice carry two MXgenes, MX1 and MX2, which have arisen by gene duplication; both of these genes exhibit antiviral activity against a wide range of viruses （Liu et al., 2013）. Humans also have two MX genes, encoding the MxA and MxB proteins, which are interferon-induced, dynamin- like large molecular weight guanosine triphosphatases （GTP- ases）. The antiviral functions of MxA have been deeply explored： MxA can protect cells from infection by multiple groups of pathogenic DNA and RNA viruses, such as influenza A virus and hepatitis B virus （Liu et al., 2013）.

关键词： Deletion Construct Stalk Domain Tripartite Motif Protein Capsid Binding HEK293T Cell Lysate

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Elevated atmospheric CO_(2) impact on carbon and nitrogen transformations and microbial community in replicated wetland

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Ecological Processes 2020年第1期9卷 677-688页

作者： Dawei Jiang Lifei Chen Nan Xia Eyram Norgbey Desmond Ato Koomson Williams Kweku Darkwah College of Horticulture Jilin Agricultural UniversityChangchun 130118China Jilin Tiandiren Landscape Architecture Design engineering Co.Ltd. Changchun 130117China Key Laboratory of Integrated Regulation and Resource Development on Shallow Lakes Ministry of EducationEnvironmental Engi neering DepartmentCollege of EnvironmentHohai University1 Xikang RoadGulou210098 NanjingChina

Background:Elevated atmospheric CO_(2) has direct and indirect influences on ecosystem *** impact of elevated atmospheric CO_(2) concentration on carbon and nitrogen transformations,together with the microbial community,was evaluated with water hyacinth(Eichhornia crassipes)in an open-top chamber replicated *** responses of nitrogen and carbon pools in water and wetland soil,and microbial community abundance were studied under ambient CO_(2) and elevated CO_(2)(ambient+200μL L^(−1)).Results:Total biomass for the whole plant under elevated CO_(2) increased by an average of 8%(p=0.022).Wetlands,with water hyacinth,showed a significant increase in total carbon and total organic carbon in water by 7%(p=0.001)and 21%(p=0.001),respectively,under elevated CO_(2) compared to that of ambient CO_(2).Increase in dissolved carbon in water correlates with the presence of wetland plants since the water hyacinth can directly exchange CO_(2) from the atmosphere to water by the upper epidermis of ***,the enrichment CO_(2) showed an increase in total carbon and total organic carbon concentration in wetland soil by 3%(p=0.344)and 6%(p=0.008),*** total nitrogen content in water increased by 26%(p=0.0001),while total nitrogen in wetland soil pool under CO_(2) enrichment decreased by 9%(p=0.011)due to increased soil microbial community abundance,extracted by phospholipid fatty acids,which was 25%larger in amount than that of the ambient ***:The study revealed that the elevated CO_(2) would affect the carbon and nitrogen transformations in wetland plant,water,and soil pool and increase soil microbial community abundance.

关键词： Elevated CO_(2) Carbon transformation Nitrogen transformation Microbial community abundance Phospholipid fatty acids Open-top chamber

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Theoretical Investigation on Intermolecular Interactions Between HCCF and HCCR(R=F,Cl,Br)

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Chemical Research in Chinese Universities 2009年第6期25卷 929-935页

作者： WANG Zhao-xu ZHENG Bai-shu ZHANG Jing-chang CAO Wei-liang School of Chemistry and Chemical engineering Hunan University of Science and Technology Xiangtan 411201 P. R. China Institute Of Modern Catalysis Beijing University of Chemical Technology State Key Laboratory of Chemical Resource Engi- neering Faculty of Science Beijing 100029 P. R. China

Geometries, interaction energies and electronic properties for four types of dimers（hydrogen bonded, halogen bonded, π-halogen bonded, and ~r-hydrogen bonded） between HCCF and HCCR（R=F, CI, Br） were studied via MP2/6-31 1＋＋G（d,p） ab initio calculation. It is shown that the strength of the zr-hydrogen bonded dimers turns out to be greater than those of the other three types of dimers, with the interaction energies --4.611 kJ/mol for HCCF-HCCF, -4.700 kJ/mol for HCCF-HCCC1, and -4.850 kJ/mol for HCCF-HCCBr respectively at the CCSD（T）/6-311＋＋ G（d,p）//MP2/6-31 1＋＋G（d,p） level. In an effort to understand the nature of the intermolecular interactions prevalent in these dimers, the interaction energies were decomposed into physically distinct energy components with the aid of the symmetry adapted perturbation theory（SAPT）. The dispersion force is found to be the main origin of the intermolecular interactions in hydrogen bonded and halogen bonded dimers. In the π-halogen bonded system, the dispersion is the major bonding force in HCCF-HCCF and HCCF-HCCC1, while the induction energy is the most important component in HCCF-HCCBr. However, both the dispersion and electrostatic energy play a key role in π-hydrogen bonded dimers.

关键词： Ab initio calculation Intermolecular interaction SAPT decomposition

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Acid-Functionalized Nanoparticles for Pretreatment of Wheat Straw

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Journal of Biomaterials and Nanobiotechnology 2012年第3期3卷 342-352页

作者： Leidy Pena Myles Ikenberry Keith L.Hohn Donghai Wang department of Biological and Agricultural engineering Kansas State UniversityManhattanUSA department of Chemical engi-neering Kansas State UniversityManhattanUSA

Perfluoroalkylsufonic (PFS) and alkylsufonic (AS) acid-functionalized magnetic nanoparticles were synthesized and characterized, then evaluated for their ability to hydrolyze hemicelluloses. The magnetic core was made of cobalt spinel ferrite and was coated with silica to protect it from oxidation. The silanol groups allowed surface chemical modification of the nanoparticles with the PFS and AS acid functionalities. Thermogravimetric analysis gave a total organic load of 12.6% and 32.5% (w/w) for AS and PFS nanoparticles, respectively. The surface sulfur content was calculated from XPS analysis as 1.37% and 1.93% for PFS and AS nanoparticles, respectively. Wheat straw samples were treated with the acid-functionalized nanoparticles at two different conditions: 80℃ for 24 h and 160℃ for 2 h. These experiments aimed to hydrolyze wheat straw hemicelluloses to soluble oligosaccharides. PFS nanoparticles solubilized significantly higher amounts of hemicelluloses (24.0% ± 1.1%) than their alkyl-sulfonic counterparts (9.1% ± 1.7%) at 80℃, whereas the hydrothermolysis control solubilized 7.7% ± 0.8% of the original hemicelluloses in the sample. At 160℃, PFS and AS nanoparticles gave significantly higher amounts of oligosaccharides (46.3% ± 0.4% and 45 ± 1.2%, respectively) than the control (35.0% ± 1.8%). The hemicelluloses conversion at 160?C reached 66.3% ± 0.9% using PFS nanoparticles and 61.0% ± 1.2% using AS nanoparticles compared with the control experiment, which solubilized 50.9% ± 1.7% of hemicelluloses in the biomass.

关键词： Acid-Functionalized Magnetic Nanoparticles Biomass Hemicelluloses Hydrolysis

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