Chinese Journal of Chemistry

Cover image for Chinese Journal of Chemistry

July, 2011

Volume 29, Issue 7

Pages 1295–1550

  1. Contents

    1. Top of page
    2. Contents
    3. Full Papers
    4. Note
  2. Full Papers

    1. Top of page
    2. Contents
    3. Full Papers
    4. Note
    1. Computational Characterization of Binding of Small Molecule Inhibitors to HIV-1 gp41 (pages 1307–1311)

      Kuizhong Song, Ju Bao, Yueming Sun and John Z. H. Zhang

      Version of Record online: 4 JUL 2011 | DOI: 10.1002/cjoc.201180241

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      We carried out computational study to help identify possible binding modes by docking these compounds onto the hydrophobic pocket on protein HIV-gp41 and to characterize structures of binding complexes. The detailed gp41-molecule binding interactions and free energies of binding are obtained through molecular dynamics simulation and MM-PBSA calculation. Specific molecular interactions in the gp41-inhibitor complexes are identified. Conformations were selected at the end of MD simulation. The hydrogen bond between residue for each ligand with 3.0 nm and 120° cutoffs for the distance and angle. 6M007 Mode 2 has hydrogen bond with Arg579, S2986 Mode 2 has a hydrogen bond with Arg579. Hydrophobic interaction is between residues and each ligand with 4.0 nm for the distance.

    2. Enantioselective Synthesis of Glutarimide Alkaloids Cordiarimides A, B, Crotonimides A, B, and Julocrotine (pages 1312–1318)

      Bo Teng, Jianfeng Zheng, Huiying Huang and Peiqiang Huang

      Version of Record online: 27 JUL 2011 | DOI: 10.1002/cjoc.201180248

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      Five glutarimide alkaloids cordiarimides A (5), cordiarimide B (6), crotonimide A (3), crotonimide B (4), and julocrotine (2) have been synthesized starting from Boc-L-glutamine (7). The benzylic alcohol chiral centre of cordiarimide B (6) has been established in 6:1 diastereoselectivity by catalytic asymmetric hydrogenation using Zhou's catalytic system Pd(CF3CO2)2/(R,R)-Me-DuPhos.

    3. Liquid Phase Hydrogenolysis of Biomass-derived Lactate to 1,2-Propanediol over Silica Supported Cobalt Nanocatalyst (pages 1319–1325)

      Jingjing Xue, Fang Cui, Zhiwei Huang, Jianliang Zuo, Jing Chen and Chungu Xia

      Version of Record online: 27 JUL 2011 | DOI: 10.1002/cjoc.201180249

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      The opposite preparation methods, precipitation-gel and deposition-precipitation procedures, have a great influence on the textural properties and cobalt species of both the PG and DP Co/SiO2 catalysts as well as their corresponding reducibility. Because of small particle size, high dispersion of cobalt species and facile reducibility, the Co/SiO2 catalyst prepared by precipitation-gel method presented a much higher activity in function of reduction temperature than the catalyst prepared by deposition-precipitation method.

    4. Catalytic Performance and Coking Behavior of a Submicron HZSM-5 Zeolite in Ethanol Dehydration (pages 1326–1334)

      Fei Wang, Man Luo and Wende Xiao

      Version of Record online: 27 JUL 2011 | DOI: 10.1002/cjoc.201180250

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      13C NMR spectra show that the coke deposits on the submicron ZSM-5 zeolite mainly consist of two carbon species. As the temperature increased, the saturated carbons in the range of δ 0–50 decreased while the unsaturated carbons in the range of δ 100–170 increased. These trends exhibit that the coke became more and more unsaturated with rising temperature.

    5. Comprehensive Theoretical and Experimental Studies on the CF3H Fire-extinguishing Mechanism (pages 1335–1350)

      Xiaomeng Zhou and Biao Zhou

      Version of Record online: 27 JUL 2011 | DOI: 10.1002/cjoc.201180251

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      In order to clarify the chemical suppression mechanisms of CF3H, experimental and theoretical studies were conducted respectively in this paper. Firstly, the combustion species in low pressure laminar premixed flat methane flames with CF3H addition is measured by synchrotron radiation molecular beam mass spectrometry (SR-MBMS) experimentally. Fire suppression chemistry of CF3H is investigated by selective detection of combustion radicals and intermediates in experimental process. Secondly, quantum chemistry calculations are performed to calculate the potential energy surfaces (PES) for the CF3H unimolecular dissociation reaction and reactions of CF3H with free radical OH and H at the B3LYP/6-311++G** and QCISD(T)/6-311++G** levels. Finally, the chemical suppression mechanism of CF3H was discussed by comparing the theoretical calculation with experimental measurement.

    6. Thermodynamic Study of the Extraction of Inorganic Mercury Compounds in Fish Species of the International Anzali Wetland, Iran (pages 1341–1346)

      Elahe Astani, Morteza Vahedpour and Leila Dolatyari

      Version of Record online: 27 JUL 2011 | DOI: 10.1002/cjoc.201180252

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      Thermodynamic variable of mercuric bond with SH group of cysteine amino acid of different proteins of muscle tissue in Northern pike, Gold fish, Common carp and White fish shows that the extraction of mercury compounds of sulfhydryl proteins is an endothermic process with positive value for entropy and Gibbs free energy changes at room temperature.

    7. New Insights on the Mechanism of Thermal Cleavage of Unsaturated Bicyclic Diaziridines: A DFT Study (pages 1347–1352)

      S. Arshadi, A. R. Bekhradnia, S. Ahmadi, A. R. Karami and S. Pourbeyram

      Version of Record online: 27 JUL 2011 | DOI: 10.1002/cjoc.201180253

    8. Thermal Decomposition Kinetics of Some Di- and Triorganotin(IV) Carboxylates Derived from para-Nitrophenylethanoic Acid (pages 1359–1365)

      Muhammad Danish, Nazir Ahmad, Saqib Ali and Niaz Muhammad

      Version of Record online: 27 JUL 2011 | DOI: 10.1002/cjoc.201180255

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      Thermogravimetric investigations of organotin(IV) carboxylates with the general formula RmSnL4−m (where R=CH3, C2H5, n-C4H9, C6H5, cyclo-C6H11, n-C8H17, m=2, 3, and L=para-nitrophenylethanoate anion) have been performed. Derivative thermogravimetry and differential thermal analysis techniques, Horowitz-Metzger method and the fundamental thermodynamic relations are used to evaluate the thermokinetic parameters of each thermal degradation pattern.

    9. First Hyperpolarizability Evolutions of Some Extended Sesquifulvalene Compounds (pages 1366–1372)

      Chaoyong Mang, Caiping Liu, Zhiyi Yang, Li Peng and Kechen Wu

      Version of Record online: 27 JUL 2011 | DOI: 10.1002/cjoc.201180256

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      Molecular orbital calculations of some extended sesquifulvalene compounds as On with olefins bridge and Tn with thiophenes bridge as well as their corresponding cyclopentadienyl-iron(II) coordination compounds as IOn and ITn at the hybrid density functional theory level demonstrate that the dipole moment depends linearly on the molecular size (n), and the linear polarizability depends linearly on n2 as well as the first hyperpolarizability also has a linear dependence on n3.

    10. Vesicles Formation Induced by Layered Double Hydroxides in Mixture of Lauryl Sulfonate Betaine and Sodium Dodecyl Benzenesulfonate (pages 1373–1379)

      Hongqian Nie, Shue Song and Wanguo Hou

      Version of Record online: 4 JUL 2011 | DOI: 10.1002/cjoc.201180246

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      Structurally positively charged layered double hydroxides nanoparticles may induce the vesicle formation in a mixture of a zwitterionic surfactant, lauryl sulfonate betaine, and an anionic surfactant, sodium dodecyl benzenesulfonate.

    11. Antibacterial Activities and Nuclease Properties of Two New Ternary Copper(II) Complexes with 2-(4′-Thiazolyl)-benzimidazole and 2,2′-Bipyridine/1,10-phenanthroline (pages 1380–1388)

      Xiangxiang Ren, Jiayang Chen and Xueyi Le

      Version of Record online: 27 JUL 2011 | DOI: 10.1002/cjoc.201180257

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      Two new complexes [Cu(TBZ)(bipy)Cl]Cl·H2O (1) and [Cu(TBZ)(phen)Cl]Cl·H2O (2) have been synthesized and characterized. The complexes can bind to CT-DNA via intercalative mode and cleave the plasmid DNA by hydroxyl radicals, and a singlet oxygen-like copper-oxo species at physiological pH and room temperature. Furthermore, the complexes have good antibacterial activities against certain selected microorganisms such as B. subtilis, S. aureus, Salmonella and E. coli.

    12. A Green Method for Recycling 2-Propanol from Water during Purification Process of Aqueous Nanocrystals (pages 1389–1394)

      Chunlei Wang, Shuhong Xu and Yiping Cui

      Version of Record online: 27 JUL 2011 | DOI: 10.1002/cjoc.201180258

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      Schematic illustration of the green purification of aqueous nanocrystals.

    13. Synthesis, Structure and Photoluminescent Properties of Zn(II)/Cd(II)-Complexes Containing 2,4,6-Tris-(benzimidazolyl-2-yl)pyridine Ligand (pages 1395–1400)

      Cuijin Li, Qingbing Guo, Guoqiang Yin, Xuhong Jiang and Sheng Gong

      Version of Record online: 27 JUL 2011 | DOI: 10.1002/cjoc.201180259

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      Tridentate rigid 2,4,6-tris(benzimidazolyl-2-yl)pyridine (pytbzim) ligand reacts hydrothermally with Zn(II)/Cd(II) salts to generate three binuclear photoluminescent complexes 13.

    14. Characterization and Catalytic Activity of New Metal-organic Frameworks Resulted from Self-assembly of Ph3SnCl, K[Cu(CN)2] and Nitrogen Donor Ligands (pages 1401–1410)

      Safaa El-din H. Etaiw, Abeer S. Elsherbiny and Ahmed S. Badr El-din

      Version of Record online: 27 JUL 2011 | DOI: 10.1002/cjoc.201180260

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      Five new metal-organic frameworks (MOFs) of the general composition [Ph3SnCu(CN)2·L] have been synthesized and characterized to test their potential applications as catalysts. They exhibit strong fluorescence in the solid state. Also, they are used as heterogeneous catalysts for the degradation of azo-dyes; metanil yellow (MY) by diluted solution of hydrogen peroxide as oxidant. The reaction is first order with respect to MY dye while the factors affecting the rate constant of the degradation reaction are investigated. The activation parameters of the reaction have been estimated and a possible mechanism has been proposed.

    15. Lanthanum Chloride Promoted Proliferation with Enhanced S-phase Entry and Inhibited Potassium Currents of NIH 3T3 Cells (pages 1411–1416)

      Liping Zhang, Zhuoyu Li and Pin Yang

      Version of Record online: 4 JUL 2011 | DOI: 10.1002/cjoc.201180247

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      The effects of La3+ on proliferation, cell cycles, apoptosis and ion channels were investigated in mouse embryo fibroblast NIH 3T3 cells and its possible mechanisms were explored. Our data showed that La3+ promoted cell proliferation with increased S-phase entry and inhibited the outward potassium currents in a concentration-dependent manner in NIH 3T3 cells. La3+ and Ca2+ had synergistic effect on cell proliferation and cell cycles.

    16. Silica-bonded S-sulfonic Acid as a Recyclable Catalyst for Synthesis of 2,3-Dihydroquinazolin-4(1H)-ones (pages 1417–1422)

      Khodabakhsh Niknam, Mohammad Reza Mohammadizadeh and Salimeh Mirzaee

      Version of Record online: 27 JUL 2011 | DOI: 10.1002/cjoc.201180261

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      2,3-Dihydroquinazolin-4(1H)-one derivatives were synthesized via a one-pot, three component reaction of isatoic anhydride and an aromatic aldehyde with ammonium acetate or primary amine catalyzed by silica-bonded S-sulfonic acid in ethanol at 80°C.

    17. A Practical Method to Stereospecifically Synthesize trans-Stilbene Derivatives (pages 1423–1428)

      Yujuan Jian, Gaojun Sun, Jiaming Li, Dan Su, Chuanrun Li and Guochen Zhong

      Version of Record online: 27 JUL 2011 | DOI: 10.1002/cjoc.201180279

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      A practical method to stereospecifically synthesize trans-stilbenes was developed via the one-pot benzylation-dehydration reaction of aromatic aldehydes with benzyltrimethylsilane, which was driven by tetrabutylammonium fluoride in THF. A plausible description of the whole process was proposed and the effects of substituted groups on the reaction were investigated. This method was employed to synthesize three precursors of natural products with excellent yields.

    18. Investigation into the Regiochemistry of 1,3-Dipolar Cycloaddition of C,N-Diphenyl Nitrone with Some Vinyl Sulfoximines as Dipolarophile: Theoretical Studies (pages 1429–1433)

      Farid Moeinpour

      Version of Record online: 27 JUL 2011 | DOI: 10.1002/cjoc.201180262

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      The regiochemistry of 1,3-dipolar cycloaddition reactions of C,N-diphenyl nitrone with some vinyl sulfoximines as dipolarophile was investigated using density functional theory (DFT)-based reactivity indexes and activation energy calculations at B3LYP/6-31G(d) level of theory. The theoretical results obtained in the work clearly predict the regiochemistry of the isolated cycloadducts and agree to experimental outcomes.

    19. A Rapid Synthesis of Pyranoid Glycals Promoted by β-Cyclodextrin and Ultrasound (pages 1434–1440)

      Jinzhong Zhao, Huawu Shao, Xin Wu and Shaojing Shi

      Version of Record online: 27 JUL 2011 | DOI: 10.1002/cjoc.201180263

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      A convenient and environmentally benign procedure for the synthesis of glycals from glycosyl bromides with very low zinc dust loading has been demonstrated. The process is activated by β-cyclodextrin and ultrasound.

    20. One-pot Green Procedure for Synthesis of Tetrahydrobenzo[a]xanthene-11-one Catalyzed by Brønsted Ionic Liquids under Solvent-free Conditions (pages 1441–1445)

      Masoumeh Zakeri, Majid M. Heravi, Mina Saeedi, Narges Karimi, Hossein A. Oskooie and Niloofar Tavakoli-Hoseini

      Version of Record online: 4 JUL 2011 | DOI: 10.1002/cjoc.201180240

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      An efficient one-pot condensation of β-naphthol, aldehydes and cyclic 1,3-dicarbonyl compound has been achieved with ionic liquids as catalyst, thus a variety of 8,9,10,12-tetrahydrobenzo[a]xanthen-11-one derivatives were prepared in good yields. The present approach offers several advantages such as shorter reaction times, good yields and mild reaction conditions.

    21. Novel Synthesis of Some Phthalazinone Derivatives (pages 1446–1450)

      Mahmoud R. Mahmoud, Wael S.I. Abou-Elmagd, Hamed A. Derbala and Mohamed H. Hekal

      Version of Record online: 27 JUL 2011 | DOI: 10.1002/cjoc.201180264

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      Dimethyl homophthalate condensed with isatin to give the unexpected five membered lactone 3 rather than the half ester 1 and the δ-lactone2. Treatment of compound 3 with excess hydrazine hydrate afforded phthalazinone carbohydrazide 4 which represents a novel method for the synthesis of phthalazinone derivatives. The carbohydrazide 4 upon treatment with carbon disulphide afforded 1,3,4-oxadiazole derivative 5, which reacted with ethylchloroacetate to give the S-alkylated product 6.

    22. Cyclization of 4,5-Diamino Pyrazole Derivatives and Their Antibacterial Activities (pages 1451–1459)

      Hala F. Rizk, Mahmoud A. EI-Badawi, Seham A. Ibrahim and Mohamed A. EI-Borai

      Version of Record online: 27 JUL 2011 | DOI: 10.1002/cjoc.201180265

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      A convenient synthesis of intermediates 4,5-diamino-3-aryl- 1-phenylpyrazoles 4a4c was reported. The different cyclization reactions were carried out with chalcone, 2-mercaptoacetic acid and p-anisialdehyde, ethyl chloroformate, glyoxal and thiourea to afford different N and S containing heterocycles. All the synthesized compounds were screened for antibacterial activities in vitro.

    23. Synthesis and Characterization of Sulfonated Polyimides Containing Trifluoromethyl Groups as Proton Exchange Membranes (pages 1460–1466)

      Qingshuang Zhang and Qiaoling Li

      Version of Record online: 27 JUL 2011 | DOI: 10.1002/cjoc.201180266

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      Novel sulfonated polyimides with CF3 groups were prepared to improve their hydrolytic and oxidative stabilities as proton exchange membranes. The as-obtained membranes also displayed desired proton conductivity and lower methanol permeability.

    24. Synthesis of Chiral 2-Aroyl-1-tetralols: Asymmetric Transfer Hydrgenation of 2-Aroyl-1-tetralones via Dynamic Kinetic Resolution (pages 1467–1472)

      Yun Wu, Zhicong Geng, Jinjin Bai and Yawen Zhang

      Version of Record online: 27 JUL 2011 | DOI: 10.1002/cjoc.201180267

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      The dynamic kinetic resolution of 2-aroyl-1-tetralones was achieved via asymmetric transfer hydrogenation using (S,S)-RuCl(p-cymene)TsDPEN (TsDPEN=N-(tosyl)- 1,2-diphenylethylenediamine) in formic acid/triethylamine (5:2), affording the desired products in good yields (up to 85%) with diastereomeric ratio up to >99:1 and high enantiomeric excesses (up to >99%). The absolute configuration of major product was confirmed by X-ray crystal structure analysis.

    25. Preparation and Reactions of 2-Methyl-7-(3-methyl-5-oxo-1-phenyl-2-pyrazolin-4-yl)-5-arylthiazolo[3,2-a]-pyrimido[4,5-d]oxazin-4(5H)-one (pages 1473–1482)

      Mohamed Salah K. Youssef, Mohamed S. Abbady, Ragaa A. Ahmed and Ahmed A. Omar

      Version of Record online: 27 JUL 2011 | DOI: 10.1002/cjoc.201180268

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      2-Methyl-7-(3-methyl-5-oxo-1-phenyl-2-pyrazolin-4-yl)-5-arylthiazolo[3,2-a]-pyrimido[4,5-d]oxazin-4(5H)-one and 6-chloro-(3-methyl-5-oxo-1-phenyl-2-pyrazolin-4-yl)-5-aryl-8-methyl-5H-thiazolo[3,2-a]pyrimido[4,5-d]pyrimidine were prepared and transformed to related heterocyclic systems via their reactions with various reagents. The biological activity of the prepared compounds was tested.

    26. Cu(OTf)2 Catalyzed Synthesis of Bis(5-methyl-2-furyl)methanes by Condensation of 2-Methylfuran with Carbonyl Compounds under Solvent Free Conditions (pages 1483–1488)

      Manoj Kumar Muthyala, V. Kameswara Rao and Anil Kumar

      Version of Record online: 27 JUL 2011 | DOI: 10.1002/cjoc.201180269

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      A facile and efficient one-pot three-component synthesis of bis(5-methyl-2-furyl)- methanes has been achieved, via the reaction of 2-methylfuran with a series of aliphatic and aromatic aldehydes and aliphatic ketones in presence of copper(II) triflate under solvent free conditions. The bis(5-methyl-2-furyl)methanes were obtained in 34% –72% yields and the catalyst was recycled up to four successive cycles without much loss in catalytic activity.

    27. A Concise Synthesis of the HCV Protease Inhibitor BILN 2061 and Its P3 Modified Analogs (pages 1489–1502)

      Dejun Liu, Jingchao Dong, Yunxing Yin, Rujian Ma, Yifeng Shi, Hao Wu, Shuhui Chen and Ge Li

      Version of Record online: 27 JUL 2011 | DOI: 10.1002/cjoc.201180270

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      A concise synthesis of BILN 2061 was achieved through more efficient installation of P2 4-quinoline moiety via SN2 displacement of the β-OBs group located on the 4-hydroxyl proline intermediate, which was prepared from 4-α-hydroxyl proline analog via Mitsunobu reaction with inversion of stereochemistry. In addition, a short and practical synthesis for P3 unit is also described herein. Final assembly of four fragments for BILN 2061 was achieved with an overall yield of 58% in 4 steps from P1 to 15a. Furthermore several analogs of BILN 2061 (WX-1–WX-5) containing modifications on P3 unit were synthesized successfully using the same synthetic route as described for the parent inhibitor BILN 2061.

    28. Synthesis and Supramolecular Assemblies of Tripodal 1,3,5-Tris(phenoxymethyl)-2,4,6-triethylbenzene Analogues (pages 1503–1510)

      Mingliang Ma, Lingwei Kong, Xiaoyan Li, Haishan Jin, Xiaoli Zhao and Ke Wen

      Version of Record online: 27 JUL 2011 | DOI: 10.1002/cjoc.201180271

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      Synthesis of tripodal 1,3,5-tris(phenoxymethyl)-2,4,6-triethylbenzene analogues have been described. Single crystal X-ray diffraction studies revealed that the three phenolic substituents bearing hydroxymethyl functions could form supramolecular assemblies with cavity-like structures by two individual molecules via intermolecular hydrogen-bond interactions.

    29. Isosteviol-amino Acid Conjugates as Highly Efficient Organocatalysts for the Asymmetric One-pot Three-component Mannich Reactions (pages 1511–1517)

      Yajie An, Qian Qin, Chuanchuan Wang and Jingchao Tao

      Version of Record online: 27 JUL 2011 | DOI: 10.1002/cjoc.201180272

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      Isosteviol-amino acid conjugates were synthesized and used as chiral catalysts for the asymmetric three-component Mannich reaction with hydroxyacetone as donor molecule. Good yields (up to 98%) and excellent stereoselectivities (up to 97:3 dr and 99% ee) were achieved in a short reaction time. In addition, syn- or anti-configurations of α-hydroxy-β-amino carbonyl compounds were obtained as main products with different chiral catalysts.

    30. Synthesis and Characterization of New 3-(3-Hydroxyphenyl)-4- alkyl-3,4-dihydrobenzo[e][1,3]oxazepine-1,5-dione Compounds (pages 1518–1522)

      Hasnah Osman, AbdulKarim-Talaq Mohammad, Guan-Yeow Yeap and Farook Adam

      Version of Record online: 27 JUL 2011 | DOI: 10.1002/cjoc.201180273

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      A series of 3-(3-hydroxyphenyl)-4-alkyl-3,4-dihydrobenzo[e][1,3]oxazepine-1,5-dione compounds with general formula CnH2n+1CNO(CO)2C6H4(C6H4OH) in which n are even parity numbers from 2 to 18 are prepared. The structure determinations on these compounds were performed by FT-IR spectroscopy which indicated that the terminal alkyl chain attached to the oxazepine ring was fully extended. Conformational analysis in DMSO at ambient temperature was carried out for the first time via high resolution 1H NMR and 13C NMR spectroscopy.

    31. Quantitative Analysis of Holmium Ion by a Ho3+ Ion-Selective Sensor Based on a Symmetric Thio-Schiff's Base (pages 1523–1528)

      Hassan Ali Zamani, Rahimi Fatemeh, Naghavi-Reyabbi Fatemeh, Arvinfar Ali, Imani Alihossien, Reza Ganjali Mohammad, Faridbod Farnoush and Salavati-Niasari Masoud

      Version of Record online: 27 JUL 2011 | DOI: 10.1002/cjoc.201180274

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      A poly(vinyl chloride) (PVC) membrane sensor for holmium ions was fabricated based on N-[(Z)-1-(2- thienyl)methylidene]-N-[4-(4-{[(Z)-1-(2-thienyl)methylidene]amino} phen- oxy)phenyl] amine (TPA) as a new ion carrier, acetophenon (AP) as plasticizing solvent mediator and sodium tetraphenyl borate (NaTPB) as an anion excluder.

    32. Novel Hydrazone-Based Tripodal Sensors: Single Selective Colorimetric Chemosensor for Acetate in Aqueous Solution (pages 1529–1534)

      Youming Zhang, Qiao Li, Qinsheng Zhang, Qi Lin, Cheng Cao, Mingxia Liu and Taibao Wei

      Version of Record online: 27 JUL 2011 | DOI: 10.1002/cjoc.201180275

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      A series of novel tripodal colorimetric anion sensors based on hydrazone CH[DOUBLE BOND]N[BOND]NH groups have been synthesized and their recognition behavior with anionic guests has been studied.

    33. Determination of Astaxanthin and Canthaxanthin Triplet Properties in Different Polarities of the Solvent by Laser Flash Photolysis (pages 1535–1540)

      Haixia Li, Peng Zhang, Xiyu Song and Wenfeng Wang

      Version of Record online: 27 JUL 2011 | DOI: 10.1002/cjoc.201180276

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      Triplet-triplet extinction coefficients for astaxanthin and canthaxanthin in different deaerated polarity solutions of MeCN and benzene were evaluated by laser flash photolysis at 298 K in the spectral region from 350 to 650 nm by energy transfer method, employing 2-acetonaphthone as sensitizer.

    34. Effect of Lead Contamination on Soil Microbial Activity Measured by Microcalorimetry (pages 1541–1547)

      Nan Gai, Yongliang Yang, Tao Li, Jun Yao, Fei Wang and Huilun Chen

      Version of Record online: 27 JUL 2011 | DOI: 10.1002/cjoc.201180277

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      Microcalorimetry was used to investigate the microbial activity in three types of soil, and to evaluate the influence of different concentrations of Pb2+ on soil microbial activity. It revealed that the different behaviors of microbial activity were influenced by environmental features. Microcalorimetric data also show changes in the metabolism processes affected by the different concentrations of Pb2+.

  3. Note

    1. Top of page
    2. Contents
    3. Full Papers
    4. Note
    1. Proteomics-based Characterization of Protein Complexes from Human Pancreatic Cancer Cell Line (pages 1548–1550)

      Xinli Wang, Guoqiang Chen, Zhiyun Zhao, Xiaodong Wang and Zhili Li

      Version of Record online: 27 JUL 2011 | DOI: 10.1002/cjoc.201180278

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      Differential centrifugation and three-dimensional polyacrylamide gel electrophoresis (PAGE) were performed to separate protein complexes from the cell lysate of human pancreatic cancer cell line, SW1990, followed by mass spectrometric identification. Four macromolecular protein complexes, 20S proteasome, TER ATPase, Hsp60 and Hsp90, were separated and identified.

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