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REFERENCE LINKING PLATFORM OF KOREA S&T JOURNALS
> Journal Vol & Issue
Journal of the Korean Chemical Society
Journal Basic Information
Journal DOI :
Korean Chemical Society
Editor in Chief :
Byeong Moon Kim
Volume & Issues
Volume 54, Issue 6 - Dec 2010
Volume 54, Issue 5 - Oct 2010
Volume 54, Issue 4 - Aug 2010
Volume 54, Issue 3 - Jun 2010
Volume 54, Issue 2 - Apr 2010
Volume 54, Issue 1 - Feb 2010
Selecting the target year
Synthesis of 7-Methyl-3-(2'-oxo-2H-benzopyran-6'-yl)-5H-1,4-thiazolo-[3,2-a]pyrimidin-5-one and Its Derivatives
Mulwad, Vinata.V. ; Parmar, Hitesh.T. ; Mir, Abid Ali ;
Journal of the Korean Chemical Society, volume 54, issue 1, 2010, Pages 9~12
DOI : 10.5012/jkcs.2010.54.01.009
Photophysical Parameters, Photodecomposition, Fluorescence Quenching and Convolutive Voltammetry of 7-Diethylaminocoumarin (DEAC) Laser Dye
El-Daly, S.A. ; El-Hallag, I.S. ;
Journal of the Korean Chemical Society, volume 54, issue 1, 2010, Pages 13~22
DOI : 10.5012/jkcs.2010.54.01.013
The photophysical properties of 7-diethylaminocoumarin (DEAC) laser dye have been measured in different solvents. The emission spectrum of DEAC has also been measured in cationic (CTAC) and anionic (SDS) micelles. The laser parameters have been calculated in different solvents namely acetone, dioxane, ethanol and dimethylforamide(DMF). The photoreactivity of DEAC has been studied in
solvent using 366 nm light. The values of photochemical yield (
) and rate constant (k) are determined. The interaction of organic acceptors such as picric acid (PA), tetracyanoethylene (TCNE) and 7,7,8,8-tetracynoquinonedimethane (TCNQ) with DEAC are also studied using fluorescence measurements in acetonitrile (
). The electrochemical investigation of (DEAC) has been carried out using cyclic voltammetry and convolutive voltammetry combined with digital simulation technique at a platinum electrode in 0.1 mol
tetrabutyl ammonium perchlorate (TBAP) in
solvent. The electrochemical parameters of the investigated compound were determined using cyclic and convolutive voltammetry. The extracted electrochemical parameters were verified and confirmed via digital simulation method.
Synthesis, Chemical Characterization and Catalytic Activity of Transition Metal Complexes Having Imine Based Nitrogen Donor Ligand
Hussain, Raja Azadar ; Badshah, Amin ; Asma, Maliha ;
Journal of the Korean Chemical Society, volume 54, issue 1, 2010, Pages 23~26
DOI : 10.5012/jkcs.2010.54.01.023
A Schiff base ligand (Z)-N-((Z)-2-(sec-butylimino)-1,2-diphenylethylidene)butan-2-amine was synthesized by condensation of benzil with sec-butyl amine. Complexation of the ligand was carried out with first row transition elements, manganese(II) and nickel(II). Ligand and complexes were characterized by FTIR, elemental analysis and thermogravimetric analysis in solid state and by NMR (
) in solution form. Both the complexes demonstrate good catalytic activity for butadiene oligomerization under mild conditions with methylaluminoxane (MAO) as co-catalyst.
Platinum/Nickel Catalyzed Selective Hydrosilylation of Alkynes and Alkenes with 1,1'-Bis(dimethylhydrosilyl) Ferrocene
Kim, Jin-Sik ; Kong, Young-Kun ;
Journal of the Korean Chemical Society, volume 54, issue 1, 2010, Pages 27~37
DOI : 10.5012/jkcs.2010.54.01.027
The reaction of 1,1'-bis(dimethylhydrosilyl)ferrocene with alkynes in the presence of a catalytic amount of (
leads to the acyclic mixture of monohydrosilylated and/or dihydrosilylated compounds. But the analogous reactions in the presence of Ni
catalyst yield monohydrosilylated compounds or dihydrosilylated products. The monohydrosilylated products were generated from the reactions of alkenes with the silylated ferrocene using nickel catalyst.
Analysis of Matrine Alkaloids in Human Urine by Hollow Fiber Liquid-phase Microextraction with High-performance Liquid Chromatography
Han, Dan-Dan ; Row, Kyung-Ho ;
Journal of the Korean Chemical Society, volume 54, issue 1, 2010, Pages 38~42
DOI : 10.5012/jkcs.2010.54.01.038
A sensitive quantitative method for the determination of matrine alkaloids in human urine was developed based on hollow fiber liquid-phase microextraction (HF-LPME) combined with HPLC. The influence of the different factors on the HF-LPME efficiency including the pH and ion strength of the donar solution, the pH of the acceptor solution, stirring rate and extraction time were examined. The best HF-LPME conditions were as follows: 1-octanol impregnated in the pores of the hollow fiber, 100 mmol/L of
at pH 1.50 as the acceptor solution injected into the lumen of the hollow fiber, 1 mol/L NaOH used to adjust the pH of the donor solution, stirring rate of 600 rpm and extraction time of 60 min. The LPME method was applied successfully to the analysis of matrine and sophocarpine in real urine samples.
Synthesis and Characterization of Polymer and Polymer Complex with Some Transition Metal Ions
Badr, S.K. ; Mohamed, T.Y. ;
Journal of the Korean Chemical Society, volume 54, issue 1, 2010, Pages 43~48
DOI : 10.5012/jkcs.2010.54.01.043
Polyamide derived from azo compound of o-amino phenol coupled with acetyl acetone, maleic anhydride acid and p-phenylene diamine were prepared. The prepared polyamide (PA) was refluxed with metal salts of transition metal ions include,
in dimethyl formamide (DMF) in different molar ratios. These complexes were characterized and identified by elemental and thermal analysis, IR, 1H NMR spectra. The data showed that PA ligand coordinates with metal ions in abidentate manner through donating N=N and O-H groups. The metal ions are surrounded by coordinated water molecules and anions to establish the geometrical structure of the complexes. The thermal analysis degradation at different temperatures explained the weight loss of hydrated water and the decompositions of complexes until a constant weight loss of metal oxides is obtained.
Design, Synthesis and Spectral Characterization of Novel 2-morpholino-N-(4,6-diarylpyrimidin-2-yl)acetamides
Kanagarajan, Vijayakumar ; Thanusu, Jayaraman ; Gopalakrishnan, Mannathusamy ;
Journal of the Korean Chemical Society, volume 54, issue 1, 2010, Pages 49~54
DOI : 10.5012/jkcs.2010.54.01.049
A new series of novel 2-morpholino-N-(4,6-diarylpyrimidin-2-yl)acetamides 34-42 is synthesized by the condensation of 2-chloro-N-(4,6-diarylpyrimidin-2-yl)acetamides 25-33 with morpholine in the presence of anhydrous potassium carbonate. The synthesized compounds have been characterized by melting point, elemental analysis, MS, FT-IR, one-dimensional NMR (
) spectroscopic data.
Selective Reduction of Nitro Compounds Using CeY Zeolite Under Microwaves
Arya, Kapil ; Dandia, Anshu ;
Journal of the Korean Chemical Society, volume 54, issue 1, 2010, Pages 55~58
DOI : 10.5012/jkcs.2010.54.01.055
Aliphatic and aromatic nitro compounds were selectively reduced to their corresponding amino derivatives in good yields using formic acid and CeY zeolite under monomode reactor. This system is found to be compatible with several sensitive functionalities. Beside the recycling result showed it had a long catalyst lifetime and could maintain activity even after being used for 20 cycles.
Synthesis and Antimicrobial Screening of Some Fluorinated Azoles Containing (2-(6-Methyl-2-P-tolyl-lH-imidazo[1,2-a]pyridin-3-yl) Nucleus
Shelke, Sharad ; Salunkhe, Nilesh ; Sangale, Sandeep ; Bhalerao, Swapnil ; Naik, Nilesh ; Mhaske, Ganesh ; Jadhav, Ranjana ; Karale, Bhausaheb ;
Journal of the Korean Chemical Society, volume 54, issue 1, 2010, Pages 59~64
DOI : 10.5012/jkcs.2010.54.01.059
The synthesis of a series of fluorinated thiadiazoles 3, triazoles 4 and oxadiazoles 5 are synthesized from thiosemicarbazides 2 containing (2-(6-methyl-2-p-tolyl-lH-imidazo[1,2-a]pyridin-3-yl nucleus. These reactions were carried out by conventional method as well as ultra sound irradiation method. All products have been characterized by IR, 1H NMR, MS study and screened for their antimicrobial activity.
Isolation of Alkaloids with Immune Stimulating Activity from Oryza sativa cv. Heugnambyeo
Ryu, Min-Ju ; Chung, Ha-Sook ;
Journal of the Korean Chemical Society, volume 54, issue 1, 2010, Pages 65~70
DOI : 10.5012/jkcs.2010.54.01.065
We describe the immune stimulatory effects of compounds determined by means of activity-monitored extraction and isolation techniques. As a result, 4-carboethoxy-6-methoxy-2-quinolone (1) and 4-carboethoxy-6-hydroxy-2-quinolone (2) were isolated from the ethyl acetate-soluble fraction of the Oryza sativa cv. Heugnambyeo bran, and were determined to exert significant inhibitory effects in macrophage cell line (murine RAW 264.7) and murine splenocytes. The structures were elucidated on the basis of spectroscopic evidence, particularly the results obtained via hetero nuclear multiple-bond connectivity and high-resolution MS spectroscopy. Up to date, compound (1) was isolated as natural sources for the first time.
Densities, Viscosities and Excess Properties of 2-Bromopropane - Methanol Binary Mixtures at Temperature from (298.15 to 318.15) K
Li, Hua ; Zhang, Zhen ; Zhao, Lei ;
Journal of the Korean Chemical Society, volume 54, issue 1, 2010, Pages 71~76
DOI : 10.5012/jkcs.2010.54.01.071
The densities and viscosities of 2-bromopropane-methanol binary mixtures had been determined using an digital vibrating U-tube densimeter and Ubbelohde capillary viscometer respectively from (298.15 to 318.15) K. The dependence of densities and viscosities on temperature and concentration had been correlated. The excess molar volume and the excess viscosity of the binary system were calculated from the experimental density and viscosity data. The excess molar volumes were related to compositions by polynomial regression and regression parameters and total RMSD deviations were obtained; the excess viscosities was related to compositions by Redlich-Kister equation and regression coefficients and total RMSD deviation of the excess viscosity for 2-bromopropane and methanol binary system were obtained. The results showed that the model agreed very well with the experimental data.
Synthesis and 3D-QSAR of p-Hydroxybenzohydrazide Derivatives With Antimicrobial Activity Against Multidrug-Resistant Staphylococcus aureus
Bhole, Ritesh P. ; Bhusari, Kishore P. ;
Journal of the Korean Chemical Society, volume 54, issue 1, 2010, Pages 77~87
DOI : 10.5012/jkcs.2010.54.01.077
Hospital-acquired methicillin-resistant Staphylococcus aureus (MRSA) has been an increasing problem worldwide since the initial reports over 40 years ago. To examine new drug leads with potential antibacterial activities, Various N'-[(-3-substituted-4-oxo-1,3-thiazolidin-2-ylidene]-4-hydroxy benzohydrazide (4a-4.i) and N'-[-(3,4-disubstituted)-1,3-thiazolidin-2ylidene)]-4-hydroxybenzohydrazide from (5.a-5.i) to (10.a-10.i) were synthesized using appropriate synthetic route. The entire test compounds (4.a-4.i) and from (5.a-5.i) to (10.a-10.i) were assayed in vitro against s. aureus strain. The minimum inhibitory concentration (MIC) was determined for test compounds and for reference standards. The test compounds showed significant antibacterial activity against the strains used, when tested in vitro. In general, p-hydroxybenzohydrazide ring and substituted thiazoline ring are essential for antimicrobial activity. Among the compounds tested, compounds 6.f, 7.g, 9.f and 10.f, 10 i were found to be most potent. The test compounds were found nontoxic upto the dose level of 2000
/mL. The intact compounds were then subjected for 3D-QSAR studies. 3D-QSAR study based on the principal of alignment of pharmacophoric features by Schrodinger PHASE module. The 3D-QSAR study allowed us to confirm the preferential binding mode of p-hydroxybenzohydrazide inside the active site.
Dissolution Kinetics of Thiourea in Triglycol Solution
Li, Hua ; Guo, Feng ; Hu, Guoqin ; Zhao, Lei ; Zhang, Yadong ;
Journal of the Korean Chemical Society, volume 54, issue 1, 2010, Pages 88~92
DOI : 10.5012/jkcs.2010.54.01.088
Isopropyl mercaptan is an important pharmaceutical intermediate and chemical material. And thiourea and triglycol are the main materials for the synthesis of isopropyl mercaptan. Therefore the dissolution of thiourea in triglycol solution is very important for the production of isopropyl mercaptan. The aims of this study are to examine the dissolution kinetics of thiourea in triglycol solution, and to present an alternative process for producing isopropyl mercaptan. In order to investigate the dissolution kinetics of thiourea in triglycol solution, the concentrations of solution and reaction temperature were selected as experimental parameters. It was determined that the dissolution rate of thiourea increased with the increase in solution concentration and temperature. An empirical equation was used in fitting the data. Statistical analysis indicated small errors and the results should be reliable.
Surface Treatment of Multi-walled Carbon Nanotubes for Increasing Electric Double-layer Capacitance
Kim, Ji-Il ; Kim, Ick-Jun ; Park, Soo-Jin ;
Journal of the Korean Chemical Society, volume 54, issue 1, 2010, Pages 93~98
DOI : 10.5012/jkcs.2010.54.01.093
In this work, the electrochemical properties of surface treated multi-walled carbon nanotubes (MWNTs) were studied. Nitrogen and oxygen functional groups of the MWNTs were introduced by urea and acidic treatment, respectively. The surface functional groups of the MWNTs were confirmed by X-ray photoelectron spectroscopy (XPS) measurements and zeta-potential method. The characteristics of
adsorption isotherm at 77 K, specific surface area, and total pore volumes were investigated by BET eqaution, BJH method and t-plot method. Electrochemical properties of the functionalized MWNTs were accumulated by cyclic voltammetry at the scan rates of 50
as electrolytes. As a result, the functionalized MWNTs led to an increase of capacitance as compared with pristine MWNTs. It was found that the increase of capacitance for urea treated MWNTs was attributed to the increase in density of surface functional groups, resulting in improving the wettability between electrode materials and charge species.
Synthesis of Polymer Materials Containing Platinum Nanoparticles and Their Application for Contact Lenses
Ye, Ki-Hun ; Sung, A-Young ;
Journal of the Korean Chemical Society, volume 54, issue 1, 2010, Pages 99~104
DOI : 10.5012/jkcs.2010.54.01.099
Platinum nanoparticles were added to a mixture of HEMA (2-hydroxyethyl methacrylate), NVP (N-vinyl pyrrolidone) and MMA (methyl methacrylate) in a mould at various concentrations. The resulting mixture was copolymerized by heating at
for 40 min,
for 40 min, and
for 40 min, respectively. The physical properties of contact lens were then measured. The oxygen transmissibility of
mmHg, water content of 34.22~35.52%, refractive index of 1.432~1.435, visible transmittance of 88.3~91.2% and tensile strength of 0.141~0.152 kgf were obtained. The addition of platinum nanoparticles to the polymer allowed the contact lens to have various colors without artificial coloring agents. The polymer materials satisfied the physical properties required to produce contact lenses, making the material suitable to be applied as a functional material for ophthalmological purposes.
Physical Characterization and Contact Lens Application of Polymer Produced with Propylene Glycol Additive
Kim, Tae-Hun ; Sung, A-Young ;
Journal of the Korean Chemical Society, volume 54, issue 1, 2010, Pages 105~109
DOI : 10.5012/jkcs.2010.54.01.105
HEMA (2-hydroxyethyl methacrylate), EGDMA (ethylene glycol dimethacrylate) and propylene glycol was copolymerized in the presence of AIBN (azobisisobutyronitrile) initiator in a mould. The physical properties of the contact lens were measured. The water content of 37.06~38.71%, refractive index of 1.492~1.432, visible transmittance of 89.4~91.5%, tensile strength of 0.1416~0.2302 kgf, and contact angle of
were obtained. Therefore, the contact lens material produced using propylene glycol as an additive satisfied the basic physical properties required for contact lenses application. It is interesting to note that an increase in wettability and tensile strength while having no significant changes in water content.
Competitive Adsorption of Two Basic Dyes RB5 and GB4 on a Local Clay
Elaziouti, A. ; Derriche, Z. ; Bouberka, Z. ; Laouedj, N. ;
Journal of the Korean Chemical Society, volume 54, issue 1, 2010, Pages 110~114
DOI : 10.5012/jkcs.2010.54.01.110
The equilibrium of adsorption of basics dyes RB 5 and BG 4 from a single dyes in the mixtures on the sodium-exchanged clay of the Maghnia (Algeria) was studied. The maximum adsorption capacities of BR5 and BG4 in single dyes were 465.13 and 469.90 mg/g respectively. In the simultaneous adsorption of BR5 and BG4 from mixture solutions, three different initials concentrations ratios R (R=
) were tested: 2.5/1, 1/1 and 1/2.5 using ADMI method. The isotherms adsorptions of dyes from the mixtures are characteristics of competition phenomenon. A very strong interaction between BR5 and BG4 for the active sites of adsorption of surface of clay is obtained for R = 1/1. The ratio R' (R'=
) of the adsorption capacity of BR5 and BG4 in the mixture were reduced by factor of 0.86, 0.74 and 0.84 for the initials concentrations ratios R (R=
) of 2.5/1, 1/1 and 1/2.5 respectively. The variation of the ratio of the adsorption capacity R‘ of BR5 and BG4 in the mixture solutions with initial concentration ratios R indicates that BR5 dye is slightly favourable in the competition adsorption than BG4. Langmuir and Freundlich models fit very well with adsorption behaviour of single dyes as well as the dyes in mixture solutions.
Preparation and Evaluation of New Adsorbent (Paper Sludge) in the Treatment of Waste Water of Textile Industry
Elaziouti, A. ; Laouedj, N. ; Segheir, A.A. ;
Journal of the Korean Chemical Society, volume 54, issue 1, 2010, Pages 115~119
DOI : 10.5012/jkcs.2010.54.01.115
Neutral red5 (BR 5) adsorption from aqueous solution was investigated. New solid adsorbent was prepared from paper sludge incinerated at
during 2 hours. Experiments were carried out, in batch system, to remove RB5 dye from the synthetic waste water. Maximum adsorption of 374.98 mg/g at pH 5, at room temperature and contact time of 80 min was obtained. The Langmuir and Freundlich adsorption models were applied to interpret the equilibrium isotherm. The Freundlich isotherm fits quite well with the experimental data (with highly regression coefficient
). The incinerated sludge solid samples untreated and treated with BR5 dye were characterized by FT-IR spectrophotometer.
Low Temperature Preparation and Photocatalytic Activity of TiO
Jung, Dong-Woon ;
Journal of the Korean Chemical Society, volume 54, issue 1, 2010, Pages 120~124
DOI : 10.5012/jkcs.2010.54.01.120
were synthesized by using precipitation method.
compound absorbed whole UV light as well as long wavelength of visible light (400 - 700 nm) because of the change of band gap from 3.2 eV to 1.77 eV. Results obtained revealed that
showed higher activity than pure
or P-25 for visible-photocatalytic degradation of 1,4-dichlorobenzene.
Kinetic and Thermodynamic Studies of Brilliant Green Adsorption onto Carbon/Iron Oxide Nanocomposite
Ahmad, Rais ; Kumar, Rajeev ;
Journal of the Korean Chemical Society, volume 54, issue 1, 2010, Pages 125~130
DOI : 10.5012/jkcs.2010.54.01.125
In the present work, we have investigated the adsorption efficiency of carbon/iron oxide nanocomposite towards removal of hazardous brilliant green (BG) from aqueous solutions. Carbon/iron oxide nanocomposite was prepared by chemical precipitation and thermal treatment of carbon with ferric nitrate at
. The resulting material was thoroughly characterized by TEM, XRD and TGA. The adsorption studies of BG onto nanocomposite were performed using kinetic and thermodynamic parameters. The adsorption kinetics shows that pseudo-second-order rate equation was fitted better than pseudo-first-order rate equation. The experimental data were analyzed by the Langmuir and Freundlich adsorption isotherms. Equilibrium data was fitted well to the Langmuir model with maximum monolayer adsorption capacity of 64.1 mg/g. The thermodynamic parameters were also deduced for the adsorption of BG onto nanocomposite and the adsorption was found to be spontaneous and endothermic.
Surface Properties and the Catalytic Activity of Amorphous Iron Aluminophosphates: Effect of Fe Loading
Vijayasankar, A.V. ; Aniz, C.U. ; Nagaraju, N. ;
Journal of the Korean Chemical Society, volume 54, issue 1, 2010, Pages 131~136
DOI : 10.5012/jkcs.2010.54.01.131
Iron aluminophosphates (FeAlP) with different percentage of iron were synthesized and characterized for their surface and bulk properties. The catalytic activity was determined in the transesterification of diethyl malonate with benzyl alcohol. Benzyl ethylmalonate and dibenzyl malonate were obtained as the only products. FeAlP with 0.025 mole % of iron was found to be distinctly different in its textural and catalytic properties. Formation of diester was found to be favored by the acid sites of intermediate strength. The presence of hydrated alumina and the polycondensed phosphates in the materials reduced the catalytic activity of iron aluminophosphates in transesterification reaction.
Syntheses and Characterizations of Polymer-Ceramic Composites Having Increased Hydrophilicity, Air-Permeability, and Anti-Fungal Property
Cho, Hyung-Joon ; Jung, Dong-Woon ;
Journal of the Korean Chemical Society, volume 54, issue 1, 2010, Pages 137~141
DOI : 10.5012/jkcs.2010.54.01.137
Generally, polymer materials are not air-permeable and hydrophilic. In addition, they do not possess anti-fungal property. Hydrophilicity, air-permeability, and anti-fungal properties of new composites consisting of polymer, ceramic nanoparticles, and silver ion were investigated by contact angle measurements, air permeation time, and cell culture. The hydrophilic, air-permeable, and anti-fungal composites can be used in health care industry.
Pre-service Chemistry Teachers' Awareness of Middle School Students' Misconceptions and Their Perceived Educational Needs
Han, Su-Jin ; Park, Youn-Ok ; Park, Ji-Ae ; Noh, Tae-Hee ;
Journal of the Korean Chemical Society, volume 54, issue 1, 2010, Pages 142~149
DOI : 10.5012/jkcs.2010.54.01.142
In this study, we investigated pre-service chemistry teachers' awareness and perceptions of middle school students' misconceptions and their perceived educational needs. A survey was administered to 87 seniors at the department of chemistry education of five colleges of education. The instrument was consisted of a test for their awareness and perceptions of students' misconceptions on chemistry topics and an educational need test for their experiences and needs for learning them. Analyses of the results revealed that most pre-service teachers were not thoroughly aware of students' misconceptions related to the particulate nature of matter. The perceptions of a necessity of knowing misconceptions and a willingness to deal with them were positive. However there were few pre-service teachers addressing them according to the constructivism. The pre-service teachers encountered misconceptions through chemical education courses, and had difficulties in practicing teaching strategies addressing misconceptions because of limited examples of misconceptions and insufficiencies of methods/materials in teaching. They also needed lectures and practices related to students' misconceptions. Educational implications of these findings are discussed.
The Relationships among Students' Mapping Understanding, Mapping Errors and Cognitive/Affective Variables in Learning with Analogy
Kim, Kyung-Sun ; Hwang, Sun-Young ; Noh, Tae-Hee ;
Journal of the Korean Chemical Society, volume 54, issue 1, 2010, Pages 150~157
DOI : 10.5012/jkcs.2010.54.01.150
In this study, we investigated the differences of mapping understanding and the types of mapping errors by the levels of students' cognitive/affective variables and the relationships between mapping understanding and these variables in learning 'concentration and reaction rate' with analogy. After administering the tests regarding logical thinking ability, visual imagery ability, analogical reasoning ability, self efficacy, and need for cognition as pretests, students learned with analogy. Then, students' familiarity and mapping understanding were examined. Analyses of the results revealed that the scores of the mapping understanding for the students with higher levels of all cognitive/affective variables except visual imagery ability and familiarity were significantly higher than those for the students with lower levels. The differences in the types of the mapping errors such as overmapping, failure to map, impossible mapping, artificial mapping, mismapping, rash mapping, and retention of a base feature were also found by the levels of students' cognitive and affective variables. The scores of students' mapping understanding were positively correlated with those of all cognitive and affective variables. The results of multiple regression analysis indicated that students' science achievement, logical thinking ability, and familiarity were significant predictors of mapping understanding. Educational implications of these findings are discussed.
Synthesis of Novel 2,5-Disubstituted 1,3,4-Thiadiazoles: Structural Requirements Necessary for Anticonvulsant Activity
Rajak, Harish ; Aggarwal, Navneet ; Kashaw, Sushil ; Kharya, Murli Dhar ; Mishra, Pradeep ;
Journal of the Korean Chemical Society, volume 54, issue 1, 2010, Pages 158~164
DOI : 10.5012/jkcs.2010.54.01.158
Rapid Spectrophotometric Determination of Trace Amounts of Cyanide and Hydrogen Cyanide Using p-Aminoacetanilide in Various Samples
Parmar, Prachi ; Pillai, Ajai Kumar ; Gupta, Vinay Kumar ;
Journal of the Korean Chemical Society, volume 54, issue 1, 2010, Pages 165~168
DOI : 10.5012/jkcs.2010.54.01.165
New Thermotropic Compounds with Schiff Base Mesogen and Glycols Flexible Spacers
So, Bong-Keun ; Song, Ji-Young ; Lee, Soo-Min ; Choi, Ok-Byung ; Lee, Hwan-Myung ; Lee, Jin-Young ; Kim, Seong-Jo ; Cha, Eun-Hee ; Kim, Ran-Hee ; Park, Joo-Hoon ;
Journal of the Korean Chemical Society, volume 54, issue 1, 2010, Pages 169~173
DOI : 10.5012/jkcs.2010.54.01.169
N- vs. O-alkylation on 4,6-Dimethyl-2-oxo/Thio-nicotinonitrile
Dubey, Rashmi ; Tewari, Ashish Kumar ;
Journal of the Korean Chemical Society, volume 54, issue 1, 2010, Pages 174~176
DOI : 10.5012/jkcs.2010.54.01.174