检索结果-南通市图书馆

A novel integrated UV-biofilter system to treat high concentration of gaseous chlorobenzene

在线全文

学校读者我要写书评

暂无评论

Chinese Science Bulletin 2008年第17期53卷 2712-2716页

作者： WANG Can XI JinYing HU hongying Department of Environmental Science and Engineering Tsinghua University Beijing 100084 China

A novel integrated UV-biofilter system using UV reactor as the pretreatment process was setup to trea high concentration of gaseous volatile organic compounds (VOCs). Another control biofilter withou the UV pretreatment was also established to compare the performance of the two systems. Chloro benzene was selected as a model compound. The two systems were operated in parallel under differen inlet chlorobenzene concentrations (500, 1000, 1600, mg·m?3). The experimental results indicate tha the integrated system could eliminate chlorobenzene completely (100% removal efficiency) at the inle concentration of 500 mg·m?3, whereas only 60% removal efficiency was achieved for the control biofi ter. Also the elimination capacity for the organic carbon of the integrated system was much higher tha that of the control biofilter. On the basis of intermediates analysis by Ion Chromatography and Ga Chromatography-Mass Spectrometry, the UV pretreatment has been proven to be able to enhance th performance of the following biofilter by transferring the recalcitrant target to some more biodegrad able and soluble organic products (such as formic acid and chlorophenol). Furthermore, the produce ozone, a harmful by-product from UV photo-degradation, could be easily eliminated by the followin biofiltration process.

关键词：氯苯紫外光降解生物过滤作用易挥发有机化合物

Identification of odorous compounds in reclaimed water using FPA combined with sensory GC-MS

在线全文

学校读者我要写书评

暂无评论

Journal of Environmental Sciences 2011年第10期23卷 1600-1604页

作者： Zhiming Yan Yu Zhang Jianwei Yu hongying Yuan Min Yang State Key Laboratory of Environmental Aquatic Chemistry Research Center for Eco-Environmental Sciences Chinese Academy of SciencesBeijing 100085 China.

Odorous compounds in the influent of a reclaimed water treatment plant （RWTP）, consisting of coagulation, sedimentation, continuous micro-filtration （CMF）, and chlorination in succession, in a north China city, were identified by combining flavor profile analysis （FPA） with sensory gas chromatograph-mass spectrometry （GC-MS）. The sewery/swampy/septic odor with an odor intensity of 6.4 was found to be the major odor group in the RWTP influent, and the existence of well-known odorant including dimethyl disulfide, dimethyl trisulfide, indole and skatole were confirmed using GC-MS. The result of a spiking test showed that the intensity （3.6） of the sewery/swampy/septic odor caused by these four chemicals contributed to over 50% of the odor intensity of the influent. The FPA intensity for sewery/swampy/septic odor in the RWTP effluent was 3.8, showing that the treatment process was not efficient for the removal of odorants, particularly indole and skatole.

关键词： sewery/swampy/septic odor reclaimed wastewater flavor profile analysis sensory-GC-MS analysis

Increased nitrogen fertilization inhibits the biocontrol activity promoted by the intercropping partner plant

在线全文

学校读者我要写书评

暂无评论

Insect Science 2021年第4期28卷 1179-1190页

作者： Leyun Wang hongying Cui Xinyue Chang mengmeng Zhu Zihua Zhao Department of Entomology College of Plant ProtectionChina Agricultural UniversityBeijingChina Institute of Plant Protection Ningxia Academy of Agricultural and Forestry SciencesYinchuanChina

The examination of the compatibility between agricultural practices and biocontrol activities is crucial for establishing an efficient,eco-friendly,and sustainable pest management *** this study,we examined the population dynamics of two specialist aphids,the English grain aphid(Sitobion avenae)on potted wheat and the pea aphid(Acyrthosiphon pisum)on potted alfalfa,as well as the biocontrol activity of a generalist predator,the harlequin ladybird beetle(Harmonia axyridis).We investigated their responses to the presence of the intercropping partner plant species(alfalfa and wheat,respectively)through plant volatiles or visual cues at three nitrogen fertilizer levels in a *** the absence of the predator,the English grain aphid population growth rate increased significantly with increasing nitrogen levels,whereas the pea aphid population increased significantly more slowly in response to high nitrogen *** English grain aphid and pea aphid population dynamics were unaffected by the presence of the intercropping ***,the presence of the intercropping partner enhanced the control of both aphid populations by the harlequin ladybird *** nitrogen fertilizer levels decreased the predation rates,which were otherwise increased by the intercropping *** beneficial effects of the intercropping partner were eventually non-existent at the highest nitrogen level *** results imply that the interaction between the presence of intercropping partner and the nitrogen fertilizer application affects the biocontrol activity of the natural enemies of insect ***,the compatibility between agricultural intensification and biocontrol strategies in integrated pest management programs need to be investigated.

关键词： Acyrthosiphon pisum biological control habitat Harmonia axyridis nitrogen fertilizer Sitobion avenae

Effect of simulated gastrointestinal digestion on antioxidant,and anti-inflammatory activities of bioactive peptides generated in sausages fermented with Staphylococcus simulans QB7

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Food Science and Human Wellness 2024年第3期13卷 1662-1671页

作者： hongying Li Hongbing Fan Zihan Wang Qiujin Zhu Jianping Wu Laboratory of Animal Genetics Breeding and Reproduction in the Plateau Mountainous RegionMinistry of EducationCollege of Life SciencesGuizhou UniversityGuiyang 550025China Department of Agricultural Food and Nutritional ScienceUniversity of AlbertaAlberta T6G 2P5Canada Department of Animal and Food Sciences University of KentuckyLexington 40546United States School of Liquor and Food Engineering Guizhou UniversityGuiyang 550025China

Dry-fermented sausages are a good source of bioactive peptides,whose stability against gastrointestinal(GI)digestion determines their *** study focused on evaluating the effect of peptide extracts from sausages fermented with Staphylococcus simulans QB7 during in vitro simulated GI digestion,including peptide profiles and antioxidant and anti-inflammatory *** present in sausages were degraded during digestion,with molecular weight reduced from>12 kDa to<1.5 ***,the content of amino acids increased from 381.15 to 527.07 mg/g,especially tyrosine being found only after GI *** anti-inflammatory activities were increased after GI digestion,however,the changes in antioxidant activities were the opposite.A total number of 255,252 and 386 peptide sequences were identified in undigested,peptic-digested and GI-digested samples,***,BIOPEP-UWM and admetSAR were used to further predict the functional properties and intestinal absorption of the identified peptide sequences from GI ***,18 peptides were discovered to possess either antioxidant or anti-inflammatory capacities.

关键词： Gastrointestinal digestion Sausages Bioaccessibility Anti-inflammatory activities

Polypyrrole Hollow Nanotubes Loaded with Au and Fe_(3)O_(4) Nanoparticles for Simultaneous Determination of Ascorbic Acid,Dopamine,and Uric Acid

在线全文

学校读者我要写书评

暂无评论

Chemical Research in Chinese Universities 2022年第4期38卷 941-948页

作者： SHEN Congcong CHEN Yuehua FENG Beidou CHI hongying ZHANG Hua College of Chemistry and Chemical Engineering Henan Normal UniversityXinxiang453007P.R.China

An ultrasensitive electrochemical biosensor was fabricated for electroanalytical determination of ascorbic acid(AA),dopamine(DA)and uric acid(UA)individually and simultaneously based on polypyrrole hollow nanotubes loaded with Au and Fe_(3)O_(4) nanoparticles(NPs)uniformly(PPy@Au-Fe_(3)O_(4)).The PPy@Au-Fe_(3)O_(4) nanotubes were synthesized in one-pot using MoO_(3) nanorods as templates and the polymerization of Py,the formation of Au and Fe_(3)O_(4) NPs and the removel of MoO_(3) templates took place *** studies reveal that PPy@Au-Fe_(3)O_(4) modified glassy carbon electrode(GCE)possesses excellent electrocatalytic activities toward the oxidation of AA,DA and *** oxidation peak currents increase linearly in the concentration ranges of 1–2000µmol/L for AA,0.01–25 and 25–300µmol/L for DA and 0.1–300µmol/L for *** detection limit values(S/N=3)were calculated as 0.45,0.0049,and 0.051µmol/L for AA,DA and UA in the individual *** changing the concentrations simultaneously,the calibration curves showed linearity to 1000,200,and 200µmol/L with detection limit of 0.39,0.0060,and 0.060µmol/L for AA,DA,and UA,***,the obtained biosensor was successfully applied to the detection of AA,DA,and UA with satisfactory results on actual samples.

关键词： PPy@Au-Fe_(3)O_(4)nanotube Electroactive biomolecule Electrochemical biosensor Simultaneous determination

Ionic liquids-SBA-15 hybrid catalysts for highly efficient and solvent-free synthesis of diphenyl carbonate

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Green Energy & Environment 2023年第1期8卷 183-193页

作者： Songlin Wang Qiying Zhang Chengxing Cui hongying Niu Cailing Wu Jianji Wang Collaborative Innovation Center of Henan Province for Green Manufacturing of Fine Chemicals Key Laboratory of Green Chemical Media and ReactionsMinistry of EducationSchool of Chemistry and Chemical EngineeringHenan Normal UniversityXinxiang453007China School of Chemistry and Chemical Engineering Henan Institute of Science and TechnologyXinxiang453003China

Diphenyl carbonate(DPC)is one of the versatile carbonates,and is often used for the production of *** recent years,the catalytic synthesis of DPC has become an important topic but the development of a highly active metal-free catalyst is a great ***,a series of ionic liquids-SBA-15 hybrid catalysts with different functional groups have been developed for the synthesis of DPC under solventfree condition,which are effective and clean instead of the metal-containing *** is found that in the presence of[SBA-15-IL-OH]Br catalyst,methyl phenyl carbonate(MPC)conversion of 80.5%along with 99.6%DPC selectivity is achieved,the TOF value is thrice higher than the best value reported by using transition metal-based ***,the catalyst displays remarkable stability and *** work provides a new idea to design and prepare eco-friendly catalysts in a broad range of applications for the green synthesis of carbonates.

关键词： Diphenyl carbonate Ionic liquid Mesoporous silica Disproportionation Catalytic synthesis

MIDNet:Deblurring Network for Material Microstructure Images

在线全文

学校读者我要写书评

暂无评论

Computers, Materials & Continua 2024年第4期79卷 1187-1204页

作者： Jiaxiang Wang Zhengyi Li Peng Shi hongying Yu Dongbai Sun National Center for Materials Service Safety University of Science and Technology BeijingBeijing100083China School of Materials Sun Yat-Sen UniversityShenzhen518107China School of Materials Science and Engineering Southern Marine Science and Engineering Guangdong Laboratory(Zhuhai)Sun Yat-Sen UniversityGuangzhou510006China

Scanning electron microscopy(SEM)is a crucial tool in the field of materials science,providing valuable insightsinto the microstructural characteristics of ***,SEM images often suffer from blurrinesscaused by improper hardware calibration or imaging automation errors,which present challenges in analyzingand interpretingmaterial ***,rectifying the blurring of these images assumes paramountsignificance to enable subsequent *** address this issue,we introduce a Material Images DeblurringNetwork(MIDNet)built upon the foundation of the Nonlinear Activation Free Network(NAFNet).MIDNetis meticulously tailored to address the blurring in images capturing the microstructure of *** keycontributions include enhancing the NAFNet architecture for better feature extraction and representation,integratinga novel soft attention mechanism to uncover important correlations between encoder and decoder,andintroducing newmulti-loss functions to improve training effectiveness and overallmodel *** conducta comprehensive set of experiments utilizing the material blurry dataset and compare them to several state-of-theartdeblurring *** experimental results demonstrate the applicability and effectiveness of MIDNet in thedomain of deblurring material microstructure images,with a PSNR(Peak Signal-to-Noise Ratio)reaching 35.26 dBand an SSIM(Structural Similarity)of *** dataset is available at:https://***/woshigui/MIDNet.

关键词： Image deblurring material microstructure attention mechanism deep learning

Interface behavior of chalcopyrite during flotation from cyanide tailings

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

International Journal of Minerals,Metallurgy and Materials 2022年第3期29卷 439-445页

作者： Xuemin Qiu hongying Yang Guobao Chen Linlin Tong Zhenan Jin Qin Zhang Key Laboratory for Ecological Utilization of Multi-metallic Mineral Northeastern UniversityShenyang 110819China School of Metallurgy Northeastern UniversityShenyang 110819China

The interface characteristics of cyanide tailings are different from those of the raw ore. In this study, valuable elements could not be thoroughly recovered via the flotation of cyanide tailings from Shandong, China. The interface and floatability of these tailings were investig- ated by phase analysis and flotation tests. The chalcopyrite in the cyanide tailings was fine and had a porous surface. The floatability of 68% chalcopyrite was similar to that of galena in the presence of a collector. A layer of fine galena particles compactly wrapped the chalcopyrite. The chalcopyrite recovery sharply decreased as the nonpolar oil residue in cyanide tailings was extracted using alcohol;however, this removal had no effect on the galena. The remaining chalcopyrite in the flotation tailings was covered with an oxidation layer consisting of O, Fe, S, Pb, Cu, Zn, and Si.

关键词： cyanide tailings interface behavior chalcopyrite flotation surface wrapped layer

Cost-Effective Fiber Multiplexing System Based on Low Coherence Interferometers and Application to Temperature Measurement

在线全文

学校读者我要写书评

暂无评论

Photonic Sensors 2016年第4期6卷 318-323页

作者： meng JIANG Zhongze ZHAO Kun LI Zeming WANG Yage ZHAN hongying ZHOU Fu YANG College of Science Donghua University of China Shanghai 201620 China

Based on the low-coherence interferometric principles, a cost-effective all-fiber Mach-Zehnder multiplexing system is proposed and demonstrated. The system consists of two interferometers： sensing interferometer and demodulation interferometer. By scanning an optical tunable delay line back and forth constantly with a stable speed, sensing fibers with different optical paths can be temporal interrogated. The system is experimentally proved to have a high performance with a good stability and low system noises. The multiplexing capacity of the system is also investigated. An experiment of measuring the surrounding temperature is carried out. A sensitivity of 12 gm/℃ is achieved within the range of 20 ℃ to 80 ℃. This low cost fiber multiplexing system has a potential application in the remote monitoring of temperature and strain in building structures, such as bridges and towers.

关键词： Mach-Zehnder interferometer low-coherence multiplexing fiber system