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A thin-layer spectroelectrochemical study of 3,3',5,5'-tetramethylbenzidine at SnO_2:F film optically transparent electrode

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science {1. Chemistry 2004年第4期47卷 267-275页

作者： JIAO Kui1. YANG Tao2 & NIU Shuyan1.2 1. college of Chemistry and Molecular {1., qingdao University of science and Technology, qingdao 266042, china 2. college of Chemistry and Chemical {1., Ocean University of china, qingdao 266003, china Correspondence should be addressed to Jiao Kui 1. college of Chemistry and Molecular {1. Qingdao University of Science and Technology 266042 Qingdao China 2. college of Chemistry and Chemical {1. Ocean University of China 266003 Qingdao China

The electrooxidation of 3,3′,5,5′-tetramethylbenzidine (TMB) is dependent on the pH value of Britton-Robinson (B-R) buffer solution. In this work, the electrooxidation behavior of TMB was investigated with a SnO2:F film optically transparent thin-layer spectroelectrochemical cell. TMB underwent one two-electron electrooxidation process in the pH range from 2.0 to < 4.0, and two successive one-electron electrooxidation processes in the pH range from 4.0 to < 7.0 in the B-R buffer solution. At pH 6.5, the electrooxidative product of TMB generated a subsequent chemical reaction to yield an azo compound. Several spectroelectrochemical techniques, such as thin-layer cyclic voltammetry, thin-layer cyclic voltabsorptometry, thin-layer potential-controlled electrolysis absorptometry, thin-layer single-potential-step chronoabsorptometry, thin-layer dou-ble-potential-step chronoabsorptometry, thin-layer single-potential-step open-circuit relaxation chronoabsorptometry, were applied to this investigation. The formal potential E0’ and the electron transfer number corresponding to the electrooxidation of TMB in B-R buffer solution, and the reaction rate constant of the subsequent chemical reaction were determined.

关键词： 3,3′,5,5′-tetramethylbenzidine tin oxide film optically transparent electrode thin-layer spectroelectro-chemistry electrooxidation

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Self-assembly structure formation on patterned InP surfaces

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science {1.(Technological sciences) 2009年第9期52卷 2732-2736页

作者： SU Ge1.2,CAO LiXin1.& LIU TianZhong3 1.Institute of Material science and {1.,Ocean University of china,qingdao 2661.0,china 2 Nanoscale Physics Research Laboratory,School of Physics and Astronomy,the University of Birmingham,Edgbaston,Birmingham B1. 2TT,UK 3 college of food science and engineering,Ocean University of china,qingdao 266003,china Institute of Material science and {1. Ocean University of China Qingdao 266100 China Nanoscale Physics Research Laboratory School of Physics and Astronomy the University of Birmingham Edgbaston Birmingham B15 2TT UK college of {1. science and engineering Ocean University of China Qingdao 266003 China

Self-assembly of polystyrene spheres guided by patterned n-type InP substrates has been investigated. InP surfaces were patterned using a variety of methods including wet chemical etching,sputter coating,thermal evaporation,and photo lithography. The self-assembly of polystyrene spheres depended on the appearance of patterns and was affected by the deposition techniques (sputter coating and thermal evaporation) of Au micro-squares. SEM and AFM were used to characterize the surface morphologies.

关键词： self-assembly polystyrene spheres pattern InP surface

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Preparation, characterization, viscosity and thermal conductivity of CaCO_3 aqueous nanofluids

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science {1.(Technological sciences) 2010年第2期53卷 360-368页

作者： ZHU HaiTao1. LI ChangJiang2, WU DaXiong1. ZHANG CanYing1.& YIN YanSheng2 1.college of Materials {1. and engineering, qingdao University of {1. and Technology, qingdao 266042, china 2 Department of Materials, Ocean University of china, qingdao 266003, china 1. college of Materials {1. and engineering Qingdao University of Science and Technology Qingdao 266042 China2. Department of Materials Ocean University of China Qingdao 266003 China

CaCO3 aqueous nanofluids were prepared by dispensing aqueous CaCO3 paste into distilled water under ultrasonic vibration. The actual microstructures of the CaCO3 nanofluids with different particle volume fractions were characterized by freeze etching replication transmission electron microscopy (FERTEM). Thermal conductivity and rheological behavior of the nanofluids were measured by standard analyzers. The results show that CaCO3 paste as raw material for nanofluids is advantageous to reducing aggregation of primary nanoparticles. The effective viscosities and effective thermal conductivities of the CaCO3 nanofluids are related to the aggregates of nanoparticles and can be well predicted by the modified Krieger & Dougherty formula and the modified Hamilton & Crosser model, respectively.

关键词： CaCO3 nanofluid thermal conductivity viscosity microstructure

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Investigation of 'chazi'(damaged-enamels)on Chenghua doucai Porcelains

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science {1.(Technological sciences) 2009年第6期52卷 1722-1729页

作者： DU Feng1.& SU BaoRu2 1.Institute of Chemistry & Molecular engineering,{1. University of science & Technology,{1.,china 2 college of Information science & Technology,{1. University of science & Technology,{1.,china Institute of Chemistry & Molecular engineering Qingdao University of Science & Technology Qingdao China college of Information {1. & Technology Qingdao University of Science & Technology Qingdao China

At the end of the 1.50s,Sun Yingzhou considered that the 'chazi'(damaged colour)on Chenghua doucai imperial porcelain as a defect was originally produced in firing process during Chenghua period(1.65―1.87).Researchers in china have accepted his *** any fragment with the 'chazi' has never been found in several tons of Chenghua imperial sherds excavated from Ming imperial kiln site in *** china,few scholars have questioned the formation of 'chazi',and further investigated *** researchers at the Research Laboratory in the British Museum,employing unde-structive EDXRF,have analyzed the chemical composition of the 'chazi'(damaged colour)on a Chen-ghua doucai stem cup in the museum,and they have confirmed that the 'chazi'(damaged colour)was caused by the fire of the Jianfu palace in the Forbidden City in *** on their research,the authors studied the colour chemical principle of the 'chazi's' formation *** to the ceramic technology principle,scientific reasoning for the 'chazi' was carried *** the help of the history of Qing court,the brainteaser of the 'chazi' was totally uncovered,the misunderstanding for the 'chazi' has also been *** research also suggests that employing modern science and technology is a direction to study Chinese ancient ceramic further.

关键词： Chenghua doucai porcelains court eunuchs the set on fire at the Jianfu palace ’chazi’(damaged-enamels) the British Museum colour chemical principle archaeology using science and technology

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Boundary conditions for the bending of a piezoelectric beam

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science {1.(Physics,Mechanics & Astronomy) 2008年第7期51卷 847-856页

作者： GAO Yang1. XU SiPeng2 & ZHAO BaoSheng3 1.college of {1., china Agricultural University, Beijing 1.0083, china 2 college of engineering, Ocean University of china, qingdao 266071. china 3 School of Mechanical engineering, University of {1. and Technology Liaoning, Anshan 1.4044, china 1. college of {1. China Agricultural University Beijing 100083 China 2. college of {1. Ocean University of China Qingdao 266071 China 3. School of Mechanical engineering University of Science and Technology Liaoning Anshan 114044 China

For beam bending in transversely isotropic piezoelectric media, the reciprocal theorem and the general solution of piezoelasticity are applied in a novel way to obtain the appropriate stress and mixed boundary conditions accurate to all orders for the beam of general edge geometry and loadings. By generalizing the method developed by Gregory and Wan, a set of necessary conditions on the edge-data for the existence of a rapidly decaying solution is established. The prescribed edge-data of the beam must satisfy these conditions in order that they could generate a decaying state within the beam. When stress and mixed conditions are imposed on the beam edge, these decaying state conditions for the case of bending deformation of piezoelectric beam are derived explicitly. They are then used for the correct formulation of boundary conditions for the beam theory solution (or the interior solution). Besides, an analytical solution of elastic beam is formulated to verify validity of our boundary conditions. For the stress data, our boundary conditions coincide with those obtained in conventional forms of beam theories. More importantly, the appropriate boundary conditions with two sets of mixed edge-data are obtained for the first time.

关键词： boundary conditions beam bending piezoelectric media decaying states regular states

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Mixed boundary conditions for piezoelectric plates

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science {1.(Physics,Mechanics & Astronomy) 2009年第5期52卷 755-761页

作者： GAO Yang 1.,XU SiPeng 2 &ZHAO BaoSheng 3 1.0} of {1.,china Agricultural University,Beijing 1.0083,china 2college of engineering,Ocean University of china,qingdao 266071.china 3 School of Mechanical engineering,University of {1. and Technology of Liaoning,Anshan 1.4044,china college of {1. China Agricultural University Beijing 100083 China college of {1. Ocean University of China Qingdao 266071 China School of Mechanical engineering University of Science and Technology of Liaoning Anshan 114044 China

For plate bending and stretching problems in piezoelectric materials,the reciprocal theorem and the general solution of piezoelasticity are applied in a novel way to obtain the appropriate mixed boundary conditions accurate to all order.A decay analysis technique is used to establish necessary conditions that the prescribed data on the edge of the plate must satisfy in order that it should generate a decaying state within the *** the case of axisymmetric bending and stretching of a circular plate,these decaying state conditions are obtained explicitly for the first time when the mixed conditions are imposed on the plate *** are then used for the correct formulation of boundary conditions for the interior solution.

关键词： boundary conditions piezoelectric plates mixed data bending problems stretching problems

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Colloidal organic carbon in Huanghe, Changjiang and Qiantang River

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Chinese science Bulletin 1998年第11期43卷 915-917页

作者： WANG Jiangtao college of Chemistry and Chemical {1., Ocean University of qingdao, qingdao 266003, china Callege of Chemistry and Chemical engineering Ocean University of Qingdao Qingdao China

Cross-flow ultrafiltration techniques have been used to separate colloidal organic carbon (COC) from natural water, and COC in three water samples that were collected from Huanghe, Changjiang and Qiantang River was determined. On average, COC comprised about 68.6% of the total dissolved organic carbon. The abundance of COC suggested that COC could play important roles in input fluxes and biogeochemistry of organic carbon.

关键词： cross-flow ultrafiltration colloidal organic carbon.

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Detection of Prorocentrum donghaiense using sandwich hybridization integrated with nuclease protection assay

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Acta Oceanologica Sinica 2009年第2期28卷 121-126页

作者： CHEN Jie ZHEN Yu MI Tiezhu YU Zhigang college of Marine Life {1. Ocean University of China Qingdao 266003 China college of Environmental {1. and engineering Ocean University of China Qingdao 266100 China college of Chemistry and Chemical {1. Ocean University of China Qingdao 266100 China

Prorocentrum donghaiense is an important harmful algae bloom （HAB） causing creature in china＇s seas, and the conventional visual detection can not cope with long-term monitoring and highthroughput sampling projects. An assay for P. donghaiense with sandwich hybridization integrated with nuclease protection assay （NPA-SH） was established. Tests with mixed samples and spiked field ones confirmed its good specificity and sensitivity. The cell number of P. donghaiense correlated well with the optical density, and the regression equation is y=4× 1.^- 6x＋ 0.694 9, in which x is the cell number, and y is the optical density, with r2=0.953 5. These results show that the NPA-SH method has good feasibility in the detection of P. donghaiense. Results of NPA-SH and microscopy are excellent for each sample. The NPA-SH method was a simple way in quantitative detection of P. donghaiense, and the whole process could be finished in about six hours, which provided a new approach in high-throughput sampling and long-term monitoring of P. donghaiense.

关键词： Prorocentrum donghaiense ribosomal RNA S1.enzyme sandwich hybridization integrated with nuclease protection assay (NPA-SH)

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Further study of sources of the imported cobalt-blue pigment used on Jingdezhen porcelain from late 1. to early 1. centuries

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science {1.(Technological sciences) 2008年第3期51卷 249-259页

作者： DU Feng1.& SU BaoRu2 1.Institute of Chemistry & Molecular engineering, {1. University of science & Technology, {1. 266000, china 2 college of Information science Technology, {1. University of science & Technology, {1. 266000, china Institute of Chemistry & Molecular engineering Qingdao University of Science & Technology Qingdao 266000 China college of Information {1. Technology Qingdao University of Science & Technology Qingdao 266000 China

Based on the conclusion of modern scientific analysis: the cobalt-blue pigment applied on Jingdezhen official porcelain during Yuan Dynasty and prior to Xuande reign of Ming Dynasty (1.71.1.25) contains high iron and low manganese con- tents, and the cobalt during Xuande and after Xuande periods (after 1.26) of Ming Dynasty contains high manganese and low iron contents, in combination with the traditional archaeological method, the related historical textual records were in- vestigated and analyzed, the imported cobalt employed on Jingdezhen official porcelain was studied comprehensively, systematically and logically. In fact, 'Su Ma Li Qing' (Samarra-blue) and 'Su Bo Ni Qing' (Sumatra-blue) are definitely different cobalt ores originated in different places, because of their very similar translitera- tions in Chinese, the confusion has appeared in ancient books for more than 400 years, which considered 'Su Ma Li Qing' and 'Su Bo Ni Qing' as the same co- balt-blue pigment. In this article the mistake was corrected, the possible producing places and the approximate eras of the two pigments imported to china and used at Jingdezhen were also suggested.

关键词： imported cobalt-blue pigments employed on official blue-and-white porcelain Yuan Dynasty early Ming Dy- nasty Mn/Fe content ratio Su Ma Li Qing (Samarra-blue) Su Bo Ni Qing (Sumatra-blue) scientific archae- ological research transliteration

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Cryopreservation of amphioxus (Branchiostoma belcheri) spermatozoa

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Acta Oceanologica Sinica 2009年第2期28卷 96-102页

作者： XU Yuyan ZHANG Shicui VERAPONG Vuthiphandchai SUBUNTITH Nimrat college of {1. science and engineering Ocean University of China Qingdao 266003 China college of Marine Biology Ocean University of China Qingdao 266003 China Department of Aquatic science Burapha University Chonburi 20131 Thailand Department of Microbiology and Environmental science Program Faculty of Science Burapha University Chonburi 20131 Thailand

Amphioxus, Branchiostoma belcheri, a closest relative of vertebrates, is at a high risk of extinction due to a combination of low effective population size, altered native habitats and environmental pollution, yet little is known about cryopreservation of its gametes. This study deals with the cryopreservation of amphioxus senlen. The main findings are that （1. the extender of Yao et al. is the best one among the four extenders examined; （2） the appropriate ratio of semen to extender of Yao et al. plus cryoprotectant is from 1.5 to 1.7; （3） dimethyl sulfoxide （DMSO） and methanol are the better cryoprotectants than glycerol, with DMSO giving the best results; （4） the eggs fertilized with post-thaw spermatozoa are capable of developing to at least hatching stage, and the highest hatching rate is （1..4±3.0）%. This is the first report on freezing and thawing of amphioxus spermatozoa, providing a simple and practical protocol for cryopreservation of amphioxus spermatozoa and laying a foundation for safeguarding this endangered species.

关键词： amphioxus Branehiostoma beleheri cryopreservation spermatozoa motility

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