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1Glacier changes during the last forty years in the Tarim Interior River basin,northwest China显示文摘By comparing digitized glacier outlines from the Chinese Glacier Inventory (CGI) during the 1960s-1970s and Landsat Enhance Thematic Mapper (ETM+) images from 1999 to 2001, we investigated changes for about 7665 alpine glaciers among 11665 glaciers in seven sub-basins of the Tarim Interior River basin (TIRB). The results showed that the total glacier area was reduced by 3.3% from the 1960s/ 1970s to 1999/2001 and area losses for 1-5 km2 glaciers accounted for 48.3% of the total glacier area loss in the TIRB. However, the glacier area reductions varied from 0.7% to 7.9% among the seven sub-basins of the TIRB during the study period. The glacier area changing with altitude showed that the maximum contribution of area shrinkage occurred at 4900-5400 m. Data from 25 meteorological stations in the TIRB showed increases in both the annual mean air temperature and annual precipitation during 1960-2000. This indicates that the glacier shrinkage in the TIRB over the last 40 years was largely due to regional climate warming that enhanced glacier ablation and overcame the effects of increased precipitation on the glacier mass balance.Donghui Shangguan Shiyin Liu Yongjian Ding Lianfu Ding Junli Xu Li Jing 2009Progress in Natural Science:Materials International2009,19,6:26
2Estimations of primary production and export production in the South China Sea based on sediment trap experiments显示文摘The results of time series sediment trap experiments in the South China Sea show that particulate organic carbon (POC) fluxes are influenced by the monsoons. The increase of productivity in the northern South China Sea is mainly due to northeast monsoon while in the central South China Sea the influence of southwest monsoon becomes more prominent. The annual primary production and export production calculated based on POC fluxes are 53 0-63 4 and 10 32-12 93 gC·m -2·a -1, respectively. The enhancement of POC flux during monsoon period suggest that higher palaeoproductivity or organic carbon accumulation rate in glacial age in the South China Sea might be the result of strengthening of the monsoons.Jianfang Chen Lianfu Zheng M. G. Wiesner Ronghua Chen Yulong Zheng H. K. Wong 1998Chinese Science Bulletin1998,43,7:18
3Evaluation of measurement uncertainty based on grey system theory for small samples from an unknown distribution显示文摘To evaluate measurement uncertainty for small sample size and measurement data from an unknown distribution, we propose a grey evaluation method of measurement uncertainty based on the grey relation coefficient. The uncertainty of measurement is analyzed using grey system theory, and the defects of the grey evaluation model of measurement uncertainty (GEMU) are studied. We then establish an improved grey evaluation model of measurement uncertainty (IGEMU). Simulations show that the precision of IGEMU is greater than that of GEMU, and that sample size has only a small effect on the precision of IGEVU. In particular, IGEMU is applied to evaluating measurement uncertainty for small sample size and measurement data from an unknown distribution. The measurement uncertainty of total profile deviation, which is measured by the CNC gear measuring center, can be evaluated by a combination of IGEMU and the Monte Carlo method.HAN LianFu TANG WenYan LIU YongMeng WANG Jun FU ChangFeng 2013Science China(Technological Sciences)2013,56,6:18
4Genetic pattern of belt-wide petroliferous phenomenon in the eastern Pearl River Mouth Basin and its practical application显示文摘The Pearl River Mouth Basin(PRMB) covers an area of approximately 20×104 km2. However, oil-gas fields detected in this area thus far are highly concentrated and controlled predominantly by second-order structural belts, the seven largest of which aggregate proved oil reserves of 7.7×108 m3, accounting for 86% of the total discovered reserve in the basin. These second-order structures have one common phenomenon: oil is contained in all traps present in them. In other words, they are all belt-wide petroliferous reservoirs. Research has identified eight types of second-order structural belts under two categories in the eastern PRMB. Their petroliferous properties are subject to three typical constraints: petroliferous properties of subsags hosting these structural belts, locations of these belts in the petroleum system, and availability of traps prior to the hydrocarbon expulsion and migration. The formation and distribution of oil reservoirs in these belts are characterized by subsag–belt integration and 'three-in-one'. The former indicates that sags and the second-order structural belts within the supply range of the sags constitute the basic units of hydrocarbon accumulations and are therefore inseparable. The latter indicates that a belt-wide petroliferous second-order structural belt always contains three important elements: hydrocarbon richness, effective pathway and pre-existing traps.Shi Hesheng Dai Yiding Liu Lihua Shu Yu Mei Lianfu 2014Petroleum Science2014,11,1:14
5CO_2 gas emplacement age in the Songliao Basin: Insight from volcanic quartz ^(40)Ar-^(39)Ar stepwise crushing显示文摘Due to a lack of suitable minerals, the gas/oil emplacement ages have never been accurately obtained before. CH4-CO2-saline- bearing secondary inclusions are found in quartz from the volcanic rocks of the Yingcheng Formation, the container rocks of the deep CO2 gas reservoir in the Songliao Basin. The inclusion fluid was trapped into microcracks in quartz during the gas em- placement and accumulation, providing an optimal target for the 40Ar-39Ar stepwise crushing technique to determine the CO2 gas emplacement age. 40Ar-39Ar dating results of a quartz sample by stepwise crushing yield a highly linear-regression isochron with an age of 78.4±1.3 Ma, indicating that the accumulation of the deep CO2 gas reservoir in the Songliao Basin occurred in the late Cretaceous. This is the first time to report an exact isotopic age for a CO2 gas reservoir, which indicates that the 40Ar-39Ar dating can serve as a new technique to date the oil/gas emplacement ages.YUN JianBing WU HeYong FENG ZiHui MEI LianFu QIU HuaNing 2010Chinese Science Bulletin2010,55,17:11
6Siliceous microplankton fluxes and seasonal variations in the central South China Sea during 1993-1995: monsoon climate and ? Nino responses显示文摘Seasonal variations of radiolarian and diatom fluxes in the central South China Sea during 1993-1995 were overwhelmingly controlled by monsoon climate. Radiolarian and diatom increased obviously during the Northeast (from November to February) and Southwest (from June to September) monsoons and decreased during the periods between the monsoons. The change of circulation driven by the monsoons improved water exchange in the different areas that brought rich nutrient materials for the surface microplankton, thereby enhancing radiolarian and diatom fluxes. Variation of radiolarian flux coincided with organic carbon flux, surface primary and export productivities. High radiolarian flux corresponded to high surface primary productivity. Radiolarian and diatom fluxes raised abnormally during 1994-1995 could be attributed to the El Nino event during the period.WANG Rujian, LIN Jun, ZHENG Lianfu, CHEN Ronghua & CHEN JianfangLaboratory of Marine Geology of MOE, Tongji University, Shanghai 200092, China The Key Laboratory of Submarine Geoscience, State Oceanic Administration, Hangzhou 310012, China Correspondence should be addressed to Wang Rujian 2000Chinese Science Bulletin2000,45,23:10
7Biomimetic injectable hydrogel microspheres with enhanced lubrication and controllable drug release for the treatment of osteoarthritis显示文摘The occurrence of osteoarthritis(OA)is highly associated with the reduced lubrication property of the joint,where a progressive and irreversible damage of the articular cartilage and consecutive inflammatory response dominate the mechanism.In this study,bioinspired by the super-lubrication property of cartilage and catecholamine chemistry of mussel,we successfully developed injectable hydrogel microspheres with enhanced lubrication and controllable drug release for OA treatment.Particularly,the lubricating microspheres(GelMA@DMA-MPC)were fabricated by dip coating a self-adhesive polymer(DMA-MPC,synthesized by free radical copolymerization)on superficial surface of photo-crosslinked methacrylate gelatin hydrogel microspheres(GelMA,prepared via microfluidic technology),and encapsulated with an anti-inflammatory drug of diclofenac sodium(DS)to achieve the dual-functional performance.The tribological test and drug release test showed the enhanced lubrication and sustained drug release of the GelMA@DMA-MPC microspheres.In addition,the functionalized microspheres were intra-articularly injected into the rat knee joint with an OA model,and the biological tests including qRT-PCR,immunofluorescence staining assay,X-ray radiography and histological staining assay all revealed that the biocompatible microspheres provided significant therapeutic effect against the development of OA.In summary,the injectable hydrogel microspheres developed herein greatly improved lubrication and achieved sustained local drug release,therefore representing a facile and promising technique for the treatment of OA.Ying Han Jielai Yang Weiwei Zhao Haimang Wang Yulong Sun Yuji Chen Jing Luo Lianfu Deng Xiangyang Xu Wenguo Cui Hongyu Zhang 2021Bioactive Materials2021,6,10:8
8Experimental demonstrations of high-Q superconducting coplanar waveguide resonators显示文摘We successfully designed and fabricated an absorption-type of superconducting coplanar waveguide (CPW) resonators. The resonators are made from a niobium film (about 160 nm thick) on a high-resistance Si substrate, and each resonator is fabricated as a meandered quarter-wavelength transmission line (one end is short to the ground and another end is capacitively coupled to a through feedline). With a vector network analyzer we measured the transmissions of the applied microwave through the resonators at ultra-low temperature. The obtained loaded quality factors are significantly high, i.e. up to ~10 6 . When the temperature increases slowly from the base temperature (20 mK), the resonance frequencies of the resonators are blue shifted and the quality factors are lowered slightly. In principle, this type of device can integrate a series of CPW resonators with a common feedline, making it a promising candidate as the data bus for coupling distant solid-state qubits and the sensitive detector of single photons.LI HaiJie WANG YiWen WEI LianFu ZHOU PinJia WEI Qiang CAO ChunHai FANG YuRong YU Yang WU PeiHeng 2013Chinese Science Bulletin2013,58,20:8
9^(40)Ar/^(39)Ar geochronology constraints on hydrocarbon accumulation and destruction periods in the Bankeng paleo-reservoir in the southern margin of the middle Yangtze block显示文摘The exact determination of isotopic ages of hydrocarbon accumulation,reconstruction and destruction periods using traditional isotopic dating methods is complex because of the small numbers of minerals that correlate with hydrocarbons.The quantitative and direct study of hydrocarbon geochronology is therefore an important scientific problem for isotope geochronology and petroleum geology.This study obtains two isotopic ages from a quartz vein sample associated with bitumen in a reverse fault located in the Bankeng paleo-reservoir on the southern margin of the middle Yangtze block (the northern margin of the JiangnanXuefeng uplift) by inclusion 40Ar/39Ar stepwise crushing in a vacuum.Two different and good linear inverse isochrons that correspond to two age plateaus were determined.The two ages correspond to primary inclusions of about 228 Ma and secondary inclusions of about 149 Ma.These inclusion groups represent two distinct kinds of fluids.Quartz veins associated with bitumen in faulted paleo-reservoirs,which have a strict response relationship with tectonization and hydrocarbon accumulation,are the unified products of tectonic processes,hydrocarbon accumulation and reconstruction.Therefore,they can be used to constrain the hydrocarbon accumulation,reconstruction and destruction periods that are controlled by multiphase and complicated tectonic actions.The evolutionary processes of hydrocarbon accumulation can be divided into two periods consisting of a primary oil and gas reservoir formation period in the late Indosinian epoch (about 228 Ma) and a period of oil and gas reservoir reconstruction in the early Yanshan epoch (about 149 Ma).This study quantitatively reconstructs the hydrocarbon accumulation and destruction chronological framework of a giant hydrocarbon accumulation belt along the southern margin of the middle Yangtze block (the northern margin of the Jiangnan-Xuefeng uplift) controlled by multiphase and complicated tectonism.The two ages associated with hydrocarbons here correspond to the special controlling actions of continental tectonics in the Jiangnan-Xuefeng uplift that affected the timeline of reconstruction and destruction in this giant marine hydrocarbon accumulation.This study shows the feasibility and usefulness of dating inclusions with the 40Ar/39Ar technique for hydrocarbon geochronology,especially in the marine hydrocarbon accumulation region of southern China within a geological setting of old strata,high thermal evolution hydrocarbons,and complex,multiphase and multicycle tectonization.LIU ZhaoQian MEI LianFu QIU HuaNing SHEN ChuanBo TANG JiGuang YUN JianBing 2011Chinese Science Bulletin2011,56,26:7
10Hydration-Enhanced Lubricating Electrospun Nanofibrous Membranes Prevent Tissue Adhesion显示文摘Lubrication is the key to efficient function of human tissues and has significant impact on the comfort level.However,the construction of a lubricating nanofibrous membrane has not been reported as yet,especially using a one-step surface modification method.Here,bioinspired by the superlubrication mechanism of articular cartilage,we successfully construct hydration-enhanced lubricating nanofibers via one-step in situ grafting of a copolymer synthesized by dopamine methacrylamide(DMA)and 2-methacryloyloxyethyl phosphorylcholine(MPC)onto electrospun polycaprolactone(PCL)nanofibers.The zwitterionic MPC structure provides the nanofiber surface with hydration lubrication behavior.The coefficient of friction(COF)of the lubricating nanofibrous membrane decreases significantly and is approximately 65%less than that of pure PCL nanofibers,which are easily worn out under friction regardless of hydration.The lubricating nanofibers,however,show favorable wear-resistance performance.Besides,they possess a strong antiadhesion ability of fibroblasts compared with pure PCL nanofibers.The cell density decreases approximately 9-fold,and the cell area decreases approximately 12 times on day 7.Furthermore,the in vivo antitendon adhesion data reveals that the lubricating nanofiber group has a significantly lower adhesion score and a better antitissue adhesion.Altogether,our developed hydration-enhanced lubricating nanofibers show promising applications in the biomedical field such as antiadhesive membranes.Liang Cheng Yi Wang Guoming Sun Shizhu Wen Lianfu Deng Hongyu Zhang Wenguo Cui 2020Research2020,,1:6
11Structural Features and Proto-Type Basin Reconstructions of the Bay of Bengal Basin:A Remnant Ocean Basin Model显示文摘Remnant ocean basin is a key to understand the plate suturing and subsequent uplift and erosion of orogen.The Bay of Bengal Basin(BOBB)provides a typical example to analyze the remnant ocean basin structures,evolution,and relationships between depositional filling and uplifting of the Himalayan Orogen.Thirty-nine seismic profiles as well as interval velocities of well BODC3 were used to compile isopach maps of the basin.Among the seismic data,26 seismic profiles were applied to establish 8 cross sections.The cross sections suggest the basin is asymmetric,bounded to the west by the eastern continental margin of India(ECMI)with graben-horst and to the east by the Sunda convergence margin dominated by trench-arc system.The BOBB is characterized by a prominent down flexure structures caused by huge amount of Bengal fan turbidite sediments accumulation.Our isopach maps and chronology data collected from adjacent regions reveal the initial development and fast southward growth of the Bengal fan were related to the early and major stage uplift and erosion of the Himalayan Orogen,respectively.The BOBB has experienced a critical transition from an ocean basin to a remnant ocean basin at Late Oligocene.Such basin structures and evolution features indicate the BOBB provides whole records of oblique convergence of the India and Asia plates,and the early and major stage evolution of the Himalayan Orogen.Peng Zhang Lianfu Mei Ping Xiong Xiaolin Hu Renyuan Li Huaning Qiu 2017Journal of Earth Science2017,28,4:5
12Improved performance of aluminum pigments encapsulated in hybrid inorganic-organic films显示文摘An organic silane acrylate resin(PMBK) was synthesized by free-radical solution polymerization using methyl methacrylate,butyl acrylate and(3-methacryloxypropyl)trimethoxysilane as monomers.Aluminum(Al) particles were then encapsulated in inorganic-organic hybrid films that were prepared by hydrolysis and condensation of PMBK and tetraethyl orthosilicate(TEOS) on the surface of Al pigments.Characterization results showed that PMBK and TEOS could simultaneously hydrolyze and condense with hydroxyl groups on the surface of the Al particles to form composite Al particles coated with inorganic-organic hybrid films.Compared with raw Al particles,the corrosion resistance and adhesive properties of paint films containing the composite Al particles were improved greatly,while the glossiness of the paint films decreased slightly,from 48.6° to 47.0°.In alkaline media(pH 11),the volume of evolved H_2 of composite Al particles was only 3.5 mL,whereas that of raw Al was 83.5 mL.The glossiness of paint films containing composite Al particles decreased by 1.66%after immersion in alkaline media for24 h,whereas that of raw Al decreased by 14.82%.Peel-off tests of the paint films showed that the composite particles moved slightly away from the paint films.In contrast,the raw Al particles were seriously desquamated,suggesting encapsulation of hybrid films can greatly improve the adhesive properties of Al particles in paint films.Pihui Pi Chao Liu Xiufang Wen Lianfu Zheng Shouping Xu Jiang Cheng 2015Particuology2015,13,2:5
13Black phosphorus-based 2D materials for bone therapy显示文摘Since their discovery,Black Phosphorus(BP)-based nanomaterials have received extensive attentions in the fields of electromechanics,optics and biomedicine,due to their remarkable properties and excellent biocompatibility.The most essential feature of BP is that it is composed of a single phosphorus element,which has a high degree of homology with the inorganic components of natural bone,therefore it has a full advantage in the treatment of bone defects.This review will first introduce the source,physicochemical properties,and degradation products of BP,then introduce the remodeling process of bone,and comprehensively summarize the progress of BP-based materials for bone therapy in the form of hydrogels,polymer membranes,microspheres,and three-dimensional(3D)printed scaffolds.Finally,we discuss the challenges and prospects of BP-based implant materials in bone immune regulation and outlook the future clinical application.Liang Cheng Zhengwei Cai Jingwen Zhao Fei Wang Min Lu Lianfu Deng Wenguo Cui 2020Bioactive Materials2020,5,4:4
14Lotus seedpod-inspired internal vascularized 3D printed scaffold for bone tissue repair显示文摘In the field of bone defect repair,3D printed scaffolds have the characteristics of personalized customization and accurate internal structure.However,how to construct a well-structured vascular network quickly and effectively inside the scaffold is essential for bone repair after transplantation.Herein,inspired by the unique biological structure of“lotus seedpod”,hydrogel microspheres encapsulating deferoxamine(DFO)liposomes were prepared through microfluidic technology as“lotus seeds”,and skillfully combined with a three-dimensional(3D)printed bioceramic scaffold with biomimetic“lotus”biological structure which can internally grow blood vessels.In this composite scaffold system,DFO was effectively released by 36%in the first 6 h,which was conducive to promote the growth of blood vessels inside the scaffold quickly.In the following 7 days,the release rate of DFO reached 69%,which was fundamental in the formation of blood vessels inside the scaffold as well as osteogenic differentiation of bone mesenchymal stem cells(BMSCs).It was confirmed that the composite scaffold could significantly promote the human umbilical vein endothelial cells(HUVECs)to form the vascular morphology within 6 h in vitro.In vivo,the composite scaffold increased the expression of vascularization and osteogenic related proteins Hif1-α,CD31,OPN,and OCN in the rat femoral defect model,significantly cutting down the time of bone repair.To sum up,this“lotus seedpod”inspired porous bioceramic 3D printed scaffold with internal vascularization functionality has broad application prospects in the future.Xiaoyu Han Mingjie Sun Bo Chen Qimanguli Saiding Junyue Zhang Hongliang Song Lianfu Deng Peng Wang Weiming Gong Wenguo Cui 2021Bioactive Materials2021,6,6:4
15Fullerol-hydrogel microfluidic spheres for in situ redox regulation of stem cell fate and refractory bone healing显示文摘The balance of redox homeostasis is key to stem cell maintenance and differentiation.However,this balance is disrupted by the overproduced reactive oxygen species(ROS)in pathological conditions,which seriously impair the therapeutic efficacy of stem cells.In the present study,highly dispersed fullerol nanocrystals with enhanced bioreactivity were incorporated into hydrogel microspheres using one-step innovative microfluidic technology to construct fullerol-hydrogel microfluidic spheres(FMSs)for in situ regulating the redox homeostasis of stem cells and promoting refractory bone healing.It was demonstrated that FMSs exhibited excellent antioxidant activity to quench both intracellular and extracellular ROS,sparing stem cells from oxidative stress damage.Furthermore,these could effectively promote the osteogenic differentiation of stem cells with the activation of FoxO1 signaling,indicating the intrinsically osteogenic property of FMSs.By injecting the stem cells-laden FMSs into rat calvarial defects,the formation of new bone was remarkably reinforced,which is a positive synergic effect from modulating the ROS microenvironment and enhancing the osteogenesis of stem cells.Collectively,the antioxidative FMSs,as injectable stem cell carriers,hold enormous promise for refractory bone healing,which can also be expanded to deliver a variety of other cells,targeting diseases that require in situ redox regulation.Jielai Yang Jing Liang Yuan Zhu Mu Hu Lianfu Deng Wenguo Cui Xiangyang Xu 2021Bioactive Materials2021,6,12:3
16Clonal variations in cone,seed and nut traits in a Pinus koraiensis seed orchard in Northeast China显示文摘Korean pine(Pinus koraiensis Siebold&Zucc.)in Northeastern China has been genetically improved to increase seed yields in addition to timber.To assess seed yield variability and select highly productive clones,14 cone,seed and nut traits were measured and analyzed.Variance analysis showed that all clones were signifi cantly different in various traits(P<0.01).Phenotypic coeffi cients of variation and repeatability of traits ranged from 9.1 to 34.4%and from 27.5 to 97.7%,respectively.Except for the cone layer and cone seed numbers,the other traits were positively or negatively correlated.Three principal components were identifi ed.Seed and nut traits were the most important traits in the fi rst principal component,and cone traits more important in the second.Using correlation and principal component analyses,cone number and other traits were selected to evaluate materials.Twenty-two clones were selected using a selection rate of 10%based on cone number independently or other combined traits.The genetic gain for diff erent traits ranged from 6.2 to 24.3%.The selected elite clones can supply seedlings for reforestation and the selection method can provide a theoretical basis for selection in other conifer species.David Kombi Kaviriri Yuxi Li Dawei Zhang Hongtao Li Zuoyi Fan Jingyuan Wang Lianfu Wang Qi Wang Deqiu Wang Vincent L.Chiang Xiyang Zhao 2021Journal of Forestry Research2021,32,1:3
17Experimentally testing Bell's theorem based on Hardy's nonlocal ladder proofs显示文摘Bell's theorem argues the existence of quantum nonlocality which goes basically against the hidden variable theory(HVT). Many experiments have been done via testing the violations of Bell's inequalities to statistically verify the Bell's theorem. Alternatively,by testing the Hardy's ladder proofs we experimentally demonstrate the deterministic violation of HVT and thus confirm the quantum nonlocality. Our tests are implemented with non-maximal entangled photon pairs generated by spontaneous parametric down conversions(SPDCs). We show that the degree freedom of photon entanglement could be significantly enhanced by using interference filters. As a consequence, the Hardy's ladder proofs could be tested and Bell's theorem is verified robustly. The probability of violating the locality reach to 41.9%, which is close to the expectably ideal value 46.4% for the photon pairs with degree of entanglement ε = 0.93. The higher violating probability is possible by further optimizing the experimental parameters.GUO WeiJie FAN DaiHe WEI LianFu 2015Science China(Physics,Mechanics & Astronomy)2015,58,2:2
18Capturing dynamic biological signals via bio-mimicking hydrogel for precise remodeling of soft tissue显示文摘Soft tissue remodeling is a sophisticated process that sequentially provides dynamic biological signals to guide cell behavior.However,capturing these signals within hydrogel and directing over time has still been unrealized owing to the poor comprehension of physiological processes.Here,a bio-mimicking hydrogel is designed via thiol-ene click reaction to capture the early physical signal triggered by inflammation,and the chemical signals provided with chemokine and natural adhesion sites,which guaranteed the precise soft tissue remodeling.This bio-mimicking hydrogel efficiently facilitated cell anchoring,migration,and invasion in the 3D matrix due to the permissive space and the interaction with integrin receptors.Besides,the covalently grafted chemokine-like peptide is optimal for colonization and functional differentiation of endothelial cells through a HIF-1αdependent signal pathway.Furthermore,the early polarization of macrophages,collagen deposition and angiogenesis in rat acute wound model,and the increased blood perfusion in mouse skin flap model have confirmed that the bio-mimicking hydrogel realized precise soft tissue remodeling and opens new avenues for the phased repair of different tissues such as nerve,myocardium,and even bone.Zhengwei Cai Qimanguli Saiding Liang Cheng Liucheng Zhang Zhen Wang Fei Wang Xinliang Chen Gang Chen Lianfu Deng Wenguo Cui 2021Bioactive Materials2021,6,12:2
19Application of confocal laser Raman spectroscopy on marine sediment microplastics显示文摘Marine sediment is the primary sink of microplastics and is an indicator of pollution levels.However,although there are well-developed detection methods,detection is rarely focused on lowmicrometer-sized particles,mainly due to technique limitations.In this study,a simplifi ed process omitting digestion procedures was developed to pretreat microplastics obtained from marine sediment and was coupled with micro-Raman spectroscopy to identify microplastics.Based on the overall analysis of the characteristic peak assignments,a Raman spectral reference library was constructed for 18 types of plastic.In addition,the eff ects of the measurement parameters were systematically described.Field research was then conducted to validate the developed process and investigate microplastic contamination in Huiquan Bay,Qingdao,China.This simplifi ed process could retain the original appearance of microparticles and accomplish the detection of<500μm-sized microplastics in environmental samples.Microplastics in the size range of 10-150μm accounted for 76%of all microplastics,and 56%of the total particles was particles smaller than 50μm.Polypropylene(42%)and polyethylene(20%)were predominant components of the particles.In particular,polypropylene particles smaller than 10μm were identifi ed in marine sediment.This work demonstrates that Raman spectroscopy is not only an eff ective tool for detecting environmental particles but also highly applicable for identifying particles extracted from marine sediment.LIU Jing ZHANG Xin DU Zengfeng LUAN Zhendong LI Lianfu XI Shichuan WANG Bing CAO Lei YAN Jun 2020Journal of Oceanology and Limnology2020,38,5:2
20Optimization and comparison of ultrasound/microwave assisted extraction (UMAE) and ultrasonic assisted extraction (UAE) of lycopene from tomatoes显示文摘ZHANG Lianfu LIU Zelong 2007Ultrasonics Sonochemistry2007,15,5:1
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