In art painting creation, painting material is an important carrier. Acrylic as a young material has very wide applications in modern art. This study mainly analyzed the properties of acrylic material. Firstly, the emergence and development of acrylic were introduced, and then its material characteristics were analyzed. Finally, the performance embodiment of acrylic paintings was compared with oil paintings and watercolor paintings. It was found that acrylic paintings not only had some advantages of oil and watercolor paintings but also had own style characteristics; acrylic paintings also have advantages in durability and flexibility; acrylic paintings could present the characteristics that oil and watercolor paintings did not have while realizing the techniques of them. Acrylic paintings have a broad development space in art creation, which is worth further attention and promotion.

Mononuclear Cu(II), Ni(II), Co(II), Mn(II), Zn(II), Fe(III), Ru(III), and UO2(II) complexes of 2-hydroxy-4-(p-tolyldiazenyl)benzylidene)-2-(p-tolylamino)acetohydrazide (H2L) were prepared by direct method. The ligand and its complexes were isolated in solid state and characterized by analytical techniques such as elemental and thermal analyses, molar conductance, magnetic susceptibility measurements and spectroscopic techniques such as UV-Visible, IR, 1H-NMR and 13C-NMR. The spectral data indicated that the ligand acted as neutral/monobasic bidentate or monobasic/dibasic tridentate ligand bonded to the metal ions through the oxygen atom of ketonic or enolic carbonyl group, azomethine nitrogen atom and deprotonated/protonated phenolic oxygen atom forming either tetragonally distorted octahedral or octahedral. Antimicrobial activities of the ligand and its complexes were evaluated against Escherichia coli, Bacillus subtilis and Aspergillus niger by well diffusion method. The results of antifungal activity showed that the Fe(III) complex (10) exhibited higher antifungal against Aspergillus niger than the other complexes. However, the results of antibacterial activity revealed that Cu(II) complex (4) is the most active against Escherichia coli while the Cu(II) complex (5) and Fe(III) complex (10) exhibited higher antibacterial effect on Bacillus subtilis than the other complexes.

12 kinds of (-)-catechin derivatives were designed and synthesized. The catechin derivatives were evaluated their antioxidant activities using DPPH method. Most of them showed good antioxidant activity, particularly compounds 1d, 1e and 1j exhibited more activity than butylated hydroxytoluene (BHT). Molecular docking studies for compounds 1d, 1e and 1j with STAT1 showed not only sufficent characteristics binding cavity but also agreement with the observed biological activity. Acording to docking results, the compounds showed greater than hydrogen bonding, hydrophobic interactions, electrostatic interactions, and Van der Waals interactions as compared to the reference compound. They formed hydrogen bonds with important residues such as Lys566, His568, Leu570, and Phe644. The compounds showed a novel hydrogen bonding interaction with Arg649, which was not reported previously. Our results might suggest the compounds could serve as a novel anti-oxidant agent.

New phenylthiophenechalcones,1-(biphenyl-4-yl)-3-(5-phenylthiophen-2-yl)prop-2-en-1-one (3a) and 3-(5-phenylthiophen-2-yl)-1-(4-(piperidin-1-yl) phenyl) prop-2-en-1-one (3b) were synthesized, next, their treatment with thiosemicarbazide in ethanol afforded their pyrazoline derivatives (4a) and (4b), respectively. The molecular structures of the synthesized compounds were confirmed via elemental analysis, FT-IR, 1H, 13C NMR and mass spectroscopy. The geometrical elucidation of four suggested conformers has been studied for these compounds. DFT calculations have been performed to study the stability and the structural parameters of the predicted conformers and revealed that orientation of the biphenyl and the phenylthiophene moieties affect the stability of the estimated conformers of the synthesized chalcones and pyrazoline. Moreover, two reaction mechanisms have been proposed to illustrate the reaction products and the DFT calculations have been used to confirm the reaction mechanism of the pyrazoline compounds.

RNA molecules which bind to the G-rich sequence in the 5'-UTR RNA which plays an important role in expression of N-ras, were selected. The secondary structures of five selected RNA aptamers including primer sequence were found by the CLC RNA workbench ver. 4.2 program (www.clcbio.com) and investigated with RNA structural probes such as RNase T1 which has specificity for a G in single-stranded region, RNase V1 specific for double strand and nuclease S1 specific for single strand. The generalized secondary structure model was proposed and characterized. It was composed of a central long double strand region flanked by single strand region at both end sides. The double strand region had an internal single-strand region and bulges. The single strand loop in the right side was composed of four or five nucleotides.

An electrochromic nickel oxide thin film was fabricated on a flexible PET/ITO substrate using a nanocrystallite- dispersed coating sol and bar coater. Nanocrystalline NiOx of 3-4 nm crystallite size was first synthesized by base precipitation and thermal conversion. This NiOx nanocrystallite powder was mechanically dispersed in an alcoholic solvent mixed with a silane binder to prepare a coating sol for thin film. This sol method is different from the normal sol-gel method in that it does not require the conversion of precursor by heat treatment. Therefore, this method provides a very facile method to prepare NiOx thin films on any kind of substrate and it can be easily applied to mass production. The electrochromic performance of this NiOx thin film on PET/ITO electrode with a thickness of about 400 nm was investigated in a nonaqueous LiClO4 electrolyte solution by cyclic voltammetric and repeated chronoamperometric measurements in conjunction with spectrophotometry. The visible light modulation of 44% and the colorization efficiency of 41 ㎠/C at 550 nm were obtained at the step potentials of -0.8/+1.2 V vs Ag and a duration of 30 s.

초중등 과학교사들은 인성교육의 필요성을 인지하고 있지만 평가, 경쟁적 분위기, 과중한 업무, 시간 부족의 이유로 인성교육을 실천하는데 어려움을 느끼고 있다. 이러한 선행 연구들은 실제로 인성교육을 수업에 적용한 경험이 없는 교사를 대상으로 한 것이 대부분이다. 인성교육 프로그램을 수업에 적용한 경험이 있는 교사들에 대한 연구가 많지 않기 때문에 실제로 과학 수업에서 인성교육 프로그램을 적용했을 때 발생하는 문제와 제안점을 논의하는 연구가 흔치 않다. 이 연구는 선행연구에서 그 효과가 논의된 인성역량 함양을 위한 협력적 문제해결(CoProC; Collaborative Problem-Solving for Character Competence) 프로그램을 수업 현장에 적용한 교사들의 실천에 대한 것이다. 과학 수업에 CoProC 프로그램을 적용한 5명의 교사가 연구에 참여하였다. CoProC 프로그램 수업에 참여한 학생들의 인성역량 성취도와 교사들의 두차례 인터뷰를 분석하여 결과를 도출하였다. 연구결과에 따르면 교사의 일반 교직 경력보다는 CoProC 프로그램에 대한 연수, 개발, 수업 경험이 학생의 인성역량 성취에 영향을 미치고, CoProC 프로그램의 목적에 대한 교사의 이해가 수업에서 어려움, 평가, 피드백에 영향을 미친다.

The present study describes a hands-on experiment to help students understand the concept of phase change or phase transition and its application in a phase change material (PCM). PCMs are substances that have the capability of storing and releasing large amounts of thermal energy. They act as energy storage materials that provide an effective way to save energy by reducing the electricity required for heating and cooling. Lauric acid (LA) was selected as an example of the PCM. Students investigated the temperature change of LA and the temperature (of air) inside the test tube. The differences in the temperatures of the systems helped students understand how PCMs work. A one-group pretest and posttest design was implemented with 34 grade-11 students in science and mathematics. Students' understanding was assessed using a multiple-choice test and a questionnaire. The findings revealed that the designed activity helped students understand the concept of phase change and its application to materials for thermal energy storage.

이 연구는 협력적 문제해결 중심 교수모델(CoProC)에 기반한 화학 수업을 고등학교 3학년 86명에게 적용하고 이에 따른 인성역량 변화를 인성역량 검사, 논의과정 분석, 반성 글쓰기 분석으로 알아보았으며, 평가 결과 간 상관관계를 분석하였다. 연구 결과, 세 평가 간 상관관계는 낮았으나 모두 인성역량 평균 점수가 향상되었고 세부 인성역량 요소에서는 차이가 나타났다. 인성역량 검사는 자기평가로써 학생들이 학습의 주인의식을 갖고 참여하도록 하였고, 논의과정 분석은 과정평가로써 학생의 말과 행동으로 나타나는 인성역량을 평가하기에 적합한 평가 방법으로 나타났으며, 반성 글쓰기 분석은 학생이 학습 전 과정을 되돌아보면서 행동으로 나타나기 어려운 인성역량을 분석할 수 있다는 장점을 보였다. 따라서 세 인성역량 평가 방법이 상호 보완적으로 함께 실시되면 학생들의 인성역량에 대한 세부적이고 종합적인 정보를 얻을 수 있다고 판단된다.