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Orthogonal design for optimization of pigment extraction from surface sediments of the Changjiang River Estuary

Acta Oceanologica sinica 2011年第4期30卷 33-42页

作者： ZHAO Jun YAO Peng YU Zhigang Thomas s Bianchi Key Laboratory of Marine Environment and Ecology Ministry of Education Ocean University of China Qingdao 266100 China department of Oceanography Texas A ＆ M University College Station TX 77843 USA Key Laboratory of Marine chemistry Theory and Technology Ministry of Education Ocean University of China Qingdao 266100 China Institute of Marine Organic Geochemistry College of Chemistry and Chemical Engineering Ocean University of China Qingdao 266100 China

Using a suitable solvent for extracting pigments from sediment for high performance liquid chromatography（HPLC） analysis is critical for obtaining qualitative and quantitative estimates of phytoplanktonic and benthic algal biomass,as well as community composition. Five methodological factors（sample dehydration,extraction solvent,extraction duration,number of extractions,and ratio of solvent volume：sample weight） were studied using an L 9（3 4 ） orthogonal design in a sedimentary pigment extraction experiment on samples collected from the Changjiang large-river delta-front estuary（LDE）,using HPLC analysis. The results show that the optimal extraction method for sedimentary pigments should include freeze-drying samples prior to extraction. The effects of different factors on sedimentary pigment extraction were separated by the L 9（3 4 ） orthogonal design experiments and showed that the extraction solvent was the most important,with extraction duration the second most important,and numbers of extraction and ratio of solvent volume：sample weight was the least important. The mixed solvent treatment comprised of acetone,methanol and water（80：15：5,by volume） was best for polar pigment extraction,with 100% acetone better for apolar pigments. For most pigments employed in this study（i.e.,peridinin,fucoxanthin,alloxanthin,diatoxanthin,zeaxanthin,pheophytin-a and β-carotene） ,3 h was found to be enough time for extraction from these deltaic sediments. However,for chlorophyll-a,the most important pigment used for estimating algal biomass,12.h was needed. A small amount of solvent（3 ml） with duplicate extractions obtained the greatest amount and diversity of pigments. Unfortunately,no extraction method was found to be suitable for all pigments in sediments. The choice of extraction procedure should be made in accordance with the objective of each study,taking into consideration the properties of sediments and pigments in question.

关键词： sedimentary pigments extraction orthogonal design HPLC Changjiang River Estuary

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studies on Amidothiosemicarbazides and Related Hcterocyclic Derivatives ( XIII) --synthetic studies on 2.(3-Pyridyl)-5-Arylamino- 1,3, 4-Thiadiazoles and Oxadiazoles

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chemical Research in Chinese Universities 1989年第2期5卷 147-157页

作者： Zhang Lixue (department of chemistry, Wenzhou {2.’ s College, Wenzhou)Zhang Ziyi (department of chemistry, Lanzhou university, Lanzhou)

By ring-closure of 1-nicotinyl-4-arylthiosemicarbazides under the catalysis of concentrated sulfuric acid or mercuric acetate, a series of 2.(3-pyridyl)-5-arylarnino-1,3,4-thiadiazoles and 2.(3-pyridyl)-5-ary-lamino-1,3,4-oxadiazoles were synthesized, respectively. All the products were subjected to testing of biological activity. Furthermore, the IR, 1H NMR and Ms spectral properties of these new compounds were studied in details and some significant conclusions were drawn.

关键词： 1,3,4-Thiadiazoles ,1,3,4-Oxadiazoles synthesis

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synthesis and Crystal structure of One-dimensional Chain Complexes [K（18-C-6）]2.M（mnt）2.（M=Zn,Hg）

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chemical Research in Chinese Universities 2003年第3期 263-268页

作者： WANG Da qi 1, HE Guo fang 2. QIU Lin lin 2.and DOU Jian min 1,* 1. department of chemistry, Liaocheng {2., Liaocheng 2.2.00, P. R. China 2. department of chemistry, Taishan College, Taian 2.102., P. R. China

The reactions of 18 crown 6 with each of K 2.M=Zn, Hg; mnt=1,2. dicyanoethene 1,2. dithiolate, C 2. 2.CN) 2. 2. were studied and novel complexes [K(18 C 6)] 2.Zn(mnt) 2.(1) and [K(18 C 6)] 2.Hg(mnt) 2.(2. were characterized by elemental analysis, IR spectrum and X ray diffraction analysis. Complex 1 displays a one dimensional chain of [K(18 C 6)] 2.Zn(mnt) 2. bridged by K O interactions between adjacent [K(18 C 6)] + units. Complex 2.is also a one dimensional chain of [K(18 C 6)] 2.Hg(mnt) 2. bridged by K...s weak interactions between adjacent [K(18 C 6)] + and [Hg(mnt) 2. 2. .

关键词： One dimensional chain Crown ether mnt complex 18 Crown 6 Crystal structure

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synthesis and Luminescence study of Europium Complexes with Carboxylic Acid and 1,10-Phenanthroline Ligands

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chemical Research in Chinese Universities 1993年第3期9卷 181-187页

作者： QIAN Dong-jin and ZHANG shu-zhen (department of chemistry, shandong {2., Jinan, 2.0100)CHEN Zhong (department of chemistry, teacher s College, Yangzhou {2., Yangzhou, 2.5002.J. Van Houten(department of chemistry, st. Michael’s College, Winooski Park, Colchester, VT05439, U. s. A. )

A series of euroPium(Ⅱ)eomPlexes with earboxylie aeids andl,10-Phenantl飞ro-line:Eu(L):·pllen·jHoO,wl:ereL-formate,3-hydroxy-4-metlloxybenzoate,4一metl、oxybenzoate,4一ehloroPhenoxyaeetate,and diPI、enylaeetate,were synthesizedand el、araeterized by elemental analysis,UV sPeetrum,IR speetrum and melting *** da亡a eonfirmed tllat euroPium 15 eoordinated wirh 0 donor atoms in earboxy!ie aeidand N donor atoms inl,10一phenanthroline.A strong ligand一loealized absorption at2.0 nm!ed to a series of meta!一eentered emission bands between 580 and 710 nm as-signedto ~5D_0-7F_(0.***.2.3.)

关键词： Europium complexes synthesis Luminescence study

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A Thermochemical study of the Reaction of Lanthanum Nitrate with Alanine

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chemical Research in Chinese Universities 2000年第4期16卷 347-350页

作者： LI Qiang-guo (department of chemistry, Chenzhou {2.’ s College, Hunan 42.000, P. R. China) Chenzhou teachers Coll Dept Chem Hunan 423000 Peoples R China

The standard molar reaction enthalpy of the solid-solid coordination reaction La(NO3)3. 6H2. (s) +4Ala(s) (Ala is Alanine)=La(NO3)3·(Ala)4·H2.(s) + 5H2.(1) was studied by using classical solution calorimetry. The molar dissolution enthalpies of the reactants and the product of the solid-solid coordination reaction in 2.mol/L HCl were measured by using an isoperibol calorimeter. From the results and other auxiliary quantities, the standard molar formation enthalpy of [La (NO3)3·(Ala)4·H2., s, 2.8. 15 K] has been determined to be △fHm[La(NO3)3·(Ala)4·H2., s, 2.8. 15 K]=-3 864. 2.8 kJ/mol.

关键词： Lanthanum nitrate Alanine Thermochemistry standard molar formation enthalpy

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Large second-order optical nonlinearities of s-triazine derivatives: View from micro molecules to macro crystals

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science China chemistry 2005年第3期48卷 203-209页

作者： FANG Qi1, LEI Hong2. CUI Yuezhi3, HUANG Zhenli4, XUE Gang1 & YU Wentao1 1. state Key Laboratory of Crystal Materials, shandong university, Jinan 2.0100, China 2. school of Information science and engineering, shandong university, Jinan 2.0100, China 3. department of chemical engineering, Light Industry College of shandong, Jinan 2.0100, China 4. Key Laboratory of Biomedical Photonics, Ministry of Education, Huazhong university of science and Technology, Wuhan 430074, China 1. state Key Laboratory of Crystal Materials Shandong University 250100 Jinan China 2. school of Information science and engineering Shandong University 250100 Jinan China 3. department of chemical {2. Light Industry College of Shandong 250100 Jinan China 4. Key Laboratory of Biomedical Photonics Ministry of Education Huazhong University of Science and Technology 430074 Wuhan China

Three s-triazine derivatives have been synthesized and their structures been de-termined. These are Compound I: 2.4-dimethyl-6-(p-N,N-dimethylaminostyryl)-s-triazine (abbre-viated to NMe-1), Compound II: 2.4-dimethyl-6-(p-N,N-diethylaminostyryl)-s-triazine (to NEt-1), and Compound III: 2.methyl-4,6-bis(p-N,N-dimethylaminostyryl)-s-triazine (NMe-2.. NMe-1 and NEt-1 molecules belong to the D-π-A type with a one-dimensional charge-transfer character. NMe-1 crystallizes to centrosymmetric P1 space group, while NEt-1 to non-centrosymmetric polar Cc space group with all of the molecular charge-transfer axes taking the same orientation. Under the irradiation of 1064 nm fundamental laser, NEt-1 powder crystals radiate a 2.order harmonic light with an intensity 46.8 times that of urea. The Λ typed NMe-2.molecule, which has a two-dimensional charge-transfer character, crystallizes to polar P2. space group. Its powder crystals exhibit a 2.order harmonic intensity 46.2.times that of urea. The quantum chemical cal-culations and tensor analyses have been carried out to reveal the dependence of the macro 2.order nonlinear optical (NLO) efficiency on the micro 2.order NLO coefficients (β) and on the crystalline packing styles.

关键词： s-triazine derivatives, synthesis, structure, sHG intensities of crystals, βvalues of molecules.

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Influence of Long Term Fertilization with Different Mineral Fertilizers and Farmyard Manure on some soil chemical Properties and Crop Yields *1

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Pedosphere 1998年第3期8卷 281-288页

作者： LIU DEHUI 1, J. LABETOWICZ 2.and L. KUsZELEWsKI 2.1 Nanjing Agricultural university, Nanjing 2.0095 (China) 2.department of Agricultural {2., Warsaw Agricultural university, Warsaw 02.52. (Poland) (Received February 15, 1998 r Nanjing Agricultural university Nanjing 210095 China department of Agricultural chemistry Warsaw Agricultural University Warsaw OS-5S8 Poland

A long term fertilization experiment was carried out in an experimental field in Lyczyn near Warsaw, Poland. Application ofmineral fertilizers, especially N fertilizers with and without farmyard manure accelerated the acidification process of the soil. Application of 1.6 t CaO ha -1 every four years was essential to maintenance of the soil pH KCl at 5.5～6.6 and base saturation degree above 60%. Application of 50 t farmyard manure ha -1 every 4 years, which contained 46 kg P and 2.0 kg K, was sufficient to maintain both the K and P fertility of the soil. Besides, it was beneficial to alleviating soil acidification. As a result of long term unbalanced fertilization, yield responses to N, P and K fertilizers increased significantly with time. The efficiency of N from farmyard manure was found to be comparable to that of N fertilizer during 1988～1991.

关键词： crop yield farmyard manure mineral fertilizers soil chemical properties

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PuCO基态分子体系的分析势能函数与反应动力学(英文)

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四川大学学报（自然科学版） 2003年第4期40卷 753-758页

作者：黄辉李权内江师范学院化学系四川内江641112 四川师范大学化学系四川成都610066

在Pu原子的相对论有效原子实势近似下 ,用密度泛函B3LYP方法计算得到PuCO基态分子的平衡结构为 :RPuC=0 .30 2.2.7nm ,RCO=0 .10 919nm ,∠PuCO =12.3.72.3o,离解能为12..6 86eV ,谐振频率为 10 4 .4 2.4 7,2.2.5 .7787,2.185 .75 70cm- 1 用多体展式理论得到PuCO基态分子的分析势能函数 ,根据该分析势能函数 ,用准经典方法研究PuCO体系的分子反应动力学 ,结果表明 ,主要反应通道为生成PuCO分子通道。

关键词： PuCO B3LY 分析势能函数反应动力学

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α-Oxoketene Cyclic s, s-cetals chemistry-substitution Reaction of α,α'-Dicinnamoyl Ketene Cyclic s, s-Acetals with Ethylenediamine

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Chinese chemical Letters 1998年第3期9卷 231-232页

作者： Mei Xin ZHAO Qun LIU Fu shun LIANG Jing Fu LIU Bao Zhong ZHAO LianZhong LI (department of chemistry, Northeast Normal {2., Changchun, 13002.)(department of chemistry, Jilin teacher college, Jilin, 131000) NE Normal Univ Dept Chem Changchun 130024 Peoples R China Jilin teacher Coll Dept Chem Changchun 131000 Peoples R China

α,α'-Dicinnamoyl ketene cyclic s, s-acetals 4 were reacted with ethylenediamine to afford α,α'-dicinnamoyl ketene cyclic N,N-acetals 5. This process provides a new method for thesynthesis of 5 in high yield under ... 详细信息

关键词： α,α'-dicinnamoyl ketene cyclic s,s-acetals ethylenediamine substitution reaction,α,α'-dicinnamoyl ketene cyclic N,N-acetals

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studies on the structure and catalytic performance of s and P promoted Na-W-Mn-Zr/siO_2.catalyst for oxidative coupling of methane

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Journal of Natural Gas chemistry 2010年第1期19卷 15-20页

作者： Wen Zheng, Dangguo Cheng, Ning Zhu, Fengqiu Chen, Xiaoli Zhan department of chemical and Biochemical engineering, Zhejiang university, Hangzhou 31002., Zhejiang, China [a] department of chemical and Biochemical engineering Zhejiang University Hangzhou 310027 Zhejiang China

A series of Na-W-Mn-Zr/siO2.catalysts promoted by different contents of s or/and P were prepared and their catalytic performance for oxidative coupling of methane was investigated to clarify the effect of s and P on the Na-W-Mn-Zr/siO2.catalyst. The catalysts were characterized by X-ray diffraction （XRD） and X-ray photoelectron spectroscopy （XPs）. From the characterization results, it is found that the addition of s and P to the Na-W-Mn-ZffsiO2.catalyst helps the formation of active phases, such as α-cristobalite, Na2.O4, ZrO2. and Na2.O4. Moreover, the addition of s and P increases the concentration of surface-active oxygen species by improving the migration of active components from the bulk phase to the surface of the catalyst. According to the activity test, impressive methane conversion and C2.hydrocarbons yield were obtained at a low temperature of 102. K over the six-component Na-W-Mn-Zr-s-P/siO2.catalyst, which contained 2.wt% s and 0.4 wt% P simultaneously. The deactivation of Na-W-Mn-Zr-s-P/siO2.was due to the loss of surface active components.

关键词： oxidative coupling of methane Na-W-Mn-Zr/siO2 s P

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