1-20 Record，5121 Records。 Page 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 181 182 183 184 185 186 187 188 189 190 191 192 193 194 195 196 197 198 199 200 201 202 203 204 205 206 207 208 209 210 211 212 213 214 215 216 217 218 219 220 221 222 223 224 225 226 227 228 229 230 231 232 233 234 235 236 237 238 239 240 241 242 243 244 245 246 247 248 249 250 251 252 253 254 255 256 257
communication	PDF file Download: c344.pdf
Phytochemical Investigations and Evaluation of Antibacterial and Irritant Potential of Different Extracts of Whole Plant of Solanum Xanthocarpum Schrad and Wendl
M. Usman Ghani, M. Umar Farooq and M. T. J. Khan*
The plant of Solanum xanthocarpum contained alkaloids, tannins, steroids, saponins and sugars. Antibacterial activity of extracts of plant was tested with Agar-Well diffusion technique. The zone of inhibition indicated antibacterial effect. The hexan and aqueous extract had minute but chloroform had strong anti G+ bacterial activity. Ethanolic extract was a strong anti G+ and G– bacterial. All extracts were non-irritant. (Published online: November 25, 2010)

full paper	PDF file Download: c049.pdf
Synthesis, Characterization, Catalytic and Antibacterial Activity of Two Series of Dinuclear Ruthenium Sulphoxide Complexes Using 5,5 -Methylenebis(pyridine) as Bis-chelating Bridging Ligand
Satyendra N. Shukla,* Pratiksha Gaur, Mamta Prasad, Mahender Prasad, Ripul Mehrotra and Sheela Mathews
The reaction of a new heterocyclic bidentate N containing spacer, (ligand) 5,5’-methylenebis(pyridine) with ruthenium sulphoxide precursors resulted, dinuclear complexes. Catalytic activity of these complexes has been investigated in hydrolysis of benzonitrile. All the complexes exhibit good antibacterial activity against gram-negative bacteria Escherichia coli in comparison to Chloramphenicol. (Published online: June 7, 2011)

Invited Paper	PDF file Download: c298.pdf
(Imido)vanadium(V)-alkyl, Alkylidene Complexes Exhibiting Unique Reactivities towards Olefins, Phenols, and Benzene via 1,2-C-H Bond Activation
Kotohiro Nomura
Recent efforts for synthesis and some reactions of (imido)vanadium(V)-alkyl, -alkylidene complexes containing anionic ancillary donor ligand have been summarized. These complexes exhibit notable catalytic activity and/or selectivity for ethylene polymerization/dimerization by the ligand modifications. These alkyl complexes also show unique reactivity toward phenols, and the alkylidene complexes exhibit notable activity for ring-opening metathesis polymerization of norbornene. (Published online: June 24, 2011)

full paper	PDF file Download: c104.pdf
Profile of Parkia speciosa Hassk Metabolites Extracted with SFE using FTIR- PCA Method
Nik Norulaini Nik Abd. Rahman,* Salman Zhari, Md. Zaidul Islam Sarker,* Sahena Ferdosh, Mohd Azizi Che Yunus and Mohd Omar Abd Kadir
A rapid identification, classification and discrimination tool, combining Fourier Transform Infrared spectroscopy and Principal Component Analysis, was developed and applied to determine the chemical component profile of the supercritical fluid extracted Parkia speciosa under various temperature and pressure. Variability under different supercritical fluid extraction conditions and the separation of different chemical compounds in P. speciosa seeds were detected. (Published online: August 5, 2011)

full paper	PDF file Download: c387.pdf
Efficient Liquid-Phase Oxidation of Diphenylmethane to Benzophenone over Vanadium-Containing MCM-41 Catalysts
Chih-Wei Chen and An-Nan Ko*
Vanadium-containing MCM-41 materials were synthesized by hydrothermal (V-MCM-41) and impregnation (V/MCM-41) methods. In the oxidation of diphenylmethane to benzophenone V-MCM-41 show superior catalytic performance mainly due to the better dispersion and higher oxidation ability of vanadium-oxygen species present in the catalyst. (Published online: September 8, 2011)

full paper	PDF file Download: c421.pdf
A Modified Synthesis of Some Novel Polycyclic Aromatic Phenazines and Quinoxalines by Using the Tungstate Sulfuric Acid (TSA) as a Reusable Catalyst under Solvent-free Conditions
Bahador Karami,* Saeed Khodabakhshi and Marzieh Nikrooz
For the condensation of 1, 2-dicarbonyls and o-phenylenediamines under solvent-free conditions at room temperature, tungstate sulfuric acid (TSA) was found to be an efficient and reusable reagent. The high yield of the pure products and simple preparation of the catalyst have allowed the synthesis of several phenazines and quinoxalines using this methodology. (Published online: September 5, 2011)

full paper	PDF file Download: c369.pdf
Direct Determination of Azathioprine in Human Fluids and Pharmaceutical Formulation Using Flow Injection Chemiluminescence Analysis
Jianbo Wang, Pan Zhao and Suqin Han*
The weak CL reaction of Ce(IV) with azathioprine was enhanced by Rh6G in acidic medium. Hereby, a simple, sensitive and inexpensive FI-CL method for azathioprine had been discovered. The proposed method had been triumphantly applied to the determination of azathioprine in human fluids and pharmaceutical formulation with satisfactory results. (Published online: September 13, 2011)

full paper	PDF file Download: c475.pdf
Study on Spectrophotometric Method for Determination of Bismuth after Flotation Separation Using Microcrystalline Adsorption System
Xin-Rong Wen* and Chang-Qing Tu
Under the optimum conditions, DTMAB+ reacted with I- to produce the microcrystalline matter (Ms-M) of (DTMAB+•I-), the water-insoluble ternary association complex of (DTMAB)3[BiI6] was quantificationally adsorbed on the surface of Ms-M of (DTMAB+•I-) .Bi3+ was separated completely from K+,Na+,Ca2+,Mg2+, Co2+, Ni2+, Mn2+, Zn2+,Fe2+ and Al3+.A new method for flotation separation and determination of bismuth using microcrystalline adsorption system was established and it has been successfully applied to the determination of Bi3+ in bismuthiferous drug samples. (Published online: September 14, 2011)

full paper	PDF file Download: c385.pdf
1,3-Dibromo 5,5-Dimethylhydantoin (DBH) Catalyzed, Microwave-assisted Rapid Synthesis of 1-Amidoalkyl-2-naphthols
Setareh Habibzadeh* and Hassan Ghasemnejad-bosra
A novel procedure for the synthesis of 1-amidoalkyl-2-naphthols by the condensation of 2-naphthole with various araldehydes and acetamide in the presence of 1,3-dibromo 5,5-dimethylhydantoin (DBH) as catalyst under thermal condition and microwave irradiation in high yields. (Published online: September 15, 2011)

full paper	PDF file Download: c389.pdf
Speciation Analysis of Thallium by Reversed-phase Liquid Chromatography - Inductively Coupled Plasma Mass Spectrometry
Yun-Ling Chu, Ruoh-Yun Wang and Shiuh-Jen Jiang*
A rapid and simple thallium speciation method with better detection limits and lower retention times than the existing methods for routine monitoring of environmental samples was developed. (Published online: September 16, 2011)

full paper	PDF file Download: c182.pdf
Transesterification of Soybean Oil Catalyzed by Calcium Hydroxide which Obtained from Hydrolysis Reaction of Calcium Carbide
Ming-Yi Chen, Jian-Xun Wang, Kung-Tung Chen, Bi-Zhou Wen, Wei-Chieh Lin and Chiing-Chang Chen*
Calcium carbide reacts with water to form calcium carbide residue (CCR: main composition is calcium hydroxide) and acetylene. CCR was calcined to form calcium oxide at 600°C, which is the base catalyst for transesterification reaction. Calcinated CCR exhibited highly catalytic to yield FAME for more than 96.5 % conversion yield. (Published online: September 20, 2011)

full paper	PDF file Download: c354.pdf
Montmorillonite as a Heterogeneous Catalyst in the Efficient, Mild and One Pot Synthesis of Schiff Bases under Solvent-Free Conditions
Hossein Naeimi* and Khadijeh Rabiei
A mild and efficient method has been reported for preparation of Schiff base ligands through condensation reaction of various aromatic aldehydes and ketones with different aromatic amines in the presence of montmorillonite as a heterogeneous catalyst under solvent free conditions. (Published online: September 22, 2011)

full paper	PDF file Download: c180.pdf
Electrochemical Surface Structuring with Polyaniline Wrapped Hb for Hydrogen Peroxide Biosensing
Yaping He, Jianbin Zheng* and Qinglin Sheng
The present study has introduced a new, simple and rather universal method for the highly efficient immobilization of Hb by aqueous template-assisted electrodeposition. The composition of biocompatible materials with conducting polymers will widen the use of conducting polymers in the fabrication of novel generation biosensors. (Published online: September 26, 2011)

full paper	PDF file Download: c383.pdf
Pyrazinium Di(hydrogen sulfate) as a Novel, Highly Efficient and Homogeneous Catalyst for the Condensation of Enolizable Ketones with Aldehydes, Acetonitrile and Acetyl Chloride
Ardeshir Khazaei,* Mohammad Ali Zolfigol,* Mohammad Mokhlesi, Abdolkarim Zare, Fatemeh Derakhshan-Panah, Maria Merajoddin, Hassan Keypour and Ahmad Ali Dehghani-Firouzabadi
A highly efficient protocol for the synthesis of β-acetamido ketone or ester derivatives in the presence of pyrazinium di(hydrogen sulfate) {Py(OSO3H)2} as a novel, green and homogeneous solid acid catalyst (or saccharin sulfonic acid) at room temperature is described. one-pot multi-component condensation of enolizable ketones or alkyl acetoacetates with aldehydes, acetonitrile and acetyl chloride affords the title compounds in high yields and short reaction times. (Published online: October 3, 2011)

full paper	PDF file Download: jccs201100386.pdf
A Powder Based Polyaniline Carbon Paste Electrode for Urea Analysis
Hun-Chi Shu* and Shu-Pei Lu
A new polyaniline carbon paste electrode prepared by mixing polyaniline (emeraldine), nafion, graphite powder and urease for urea analysis was exploited. The detection limit of this sensor for urea is 5 μM and the linearity from 5 μM to 7.5 mM is obtained in FIA. This sensor shows good reproducibility and stability. (Published online: October 7, 2011)

full paper	PDF file Download: jccs201100223.pdf
Direct Electrochemistry of Glucose Oxidase Immobilized at a Novel Composite Material β-Cyclodextrin/poly(4-aminothiophenol)/Au Nanoparticle Modified Electrode
Qing-Lin Sheng, Kai Luo, Rui-Xiao Liu and Jian-Bin Zheng
The direct electrochemistry of GOx was achieved at the β-cyclodextrin/poly(4-aminothiophenol) /Au nanoparticle modified electrode. A couple of stable and well-defined redox peaks were observed with the formal potential (E0') of −0.488 V (vs. SCE) in a pH 6.98 buffer solution. (Published online: October 11, 2011)

full paper	PDF file Download: jccs201100342.pdf
Studies on Suzuki-Miyaura Reactions Catalyzed by Ferrocenyl or Cobaltocenyl Phosphines Ligated Palladium Complexes
Jun Hsiao, Chia-Ming Weng and Fung-E Hong*
The most energetically favorable routes in the Suzuki-Miyaura reactions catalyzed by the dmpf- or dmpc-derivatives ligated palladium complexes are found to having two phosphine biting sites on different carbocyclic rings and maintaining tetra-coordinated palladium conformations for all transition states and intermediates. (Published online: October 11, 2011)

full paper	PDF file Download: jccs.201100384.pdf
Electrochemical Oxidation and Sensitive Determination of Pyrogallol at Preanodized Screen-Printed Carbon Electrodes
Pi-Shan Feng, Sheng-Ming Wang, Wan-Yu Su and Shu-Hua Cheng*
We prepared the anodically pretreated screen-printed carbon electrodes (SPCE*) by electrochemical method. The preanodized SPCE* shows larger electrode active surface, faster electron transfer and improved the oxidation of pyrogallol. The working system is highly stable and shows insignificant interferences of some inorganic salts, resorcinol and caffeine. The proposed methods apply to determine pyrogallol in lake water with satisfactory recoveries. (Published online: October 14, 2011)

full paper	PDF file Download: jccs201100462.pdf
Purification and Partial Properties of a Superoxide Dismutase from Agave Hybrid No.11648
Bing Chen,* Liang Chen, Li-Jun Gao, Su-Yu Ye, Rui Xiao, Pei-Lian Liu, Bi-Lian Chen, Yun-Xia Zhang and Jun Ya
An iron -containing superoxide dismutase (SOD, [EC. 1. 15. 1. 1]) was purified from liquid of Agave Hybrid No.11648, an Agave. The method can provide a new natural source of superoxide dismutase from plants. Furthermore, this study can offer some demonstrations for extracting bioactivator from this plant.(Published online: October 17, 2011)

full paper	PDF file Download: jccs201100378.pdf
Density Functional Theory Studies on Intermolecular Interactions of 4-Amino-3,5-dinitropyrazole with NH3 and H2O
Guo-Zheng Zhao and Ming Lu*
Four fully optimized geometries of LLM-116/NH3 and LLM-116/H2O supermolecules were studied using density functional theory method with 6-311++G** basis set. The intermolecular interaction energy and thermodynamic properties were calculated. Natural bond orbital (NBO) analysis was performed. The corresponding interaction intensity sequence is: III > II > V > IV. (Published online: October 20, 2011)