Epoxy resin (EP) is a thermosetting resin with excellent properties, but its application is limited due to its high brittleness and poor flame retardancy. Therefore, to solve this problem, a dispersion system of imidazole-containing ionic liquid ([Dmim]Es) and graphene in epoxy resin is designed based on the π–π stacking effect between imidazole and graphite layers. The study on the thermal and flame-retardant properties of the composites show that the modified [Dmim]Es–graphene nanosheets improved the flame retardancy, smoke suppression and thermal stability of epoxy resin. With the addition of 5wt% [Dmim]Es and 1% Gra, the exothermic rate (HRR) and total exothermic (THR) of the composites decrease by 35% and 30.2% compared with the untreated epoxy cross-linking, respectively. The limiting oxygen index reaches 33.4%, the UL-94 test rating reaches V-0. The characterization of mechanical properties shows that the tensile properties and impact properties increased by 13% and 30%, respectively. Through SEM observation, the addition of [Dmim]Es improves the dispersion of graphene in the EP collective and changes the mechanical fracture behavior. The results show that ionic liquid [Dmim]Es-modified graphene nanosheets are well dispersed in the matrix, which not only improves the mechanical properties of epoxy resin (EP), but also has a synergistic effect on flame retardancy. This work provides novel flame-retardant and graphene dispersion methods that broaden the range of applications of epoxy resins.

Carbon nanodots (CNDs) are 0D quasi-spherical nanoparticles that are less than 10 nm in size. CNDs that possess surface functional groups such as hydroxyl, amino, and carboxyl groups have been demonstrated to scavenge free radicals efficiently and effectively, resulting in them being beneficial for cosmetic and cosmeceutical applications. In this study, we successfully prepared novel CNDs, namely black VC, using vitamin C (VC) as a promising precursor. Black VC was prepared by a facile one-step method based on short-time microwave irradiation. The properties of black VC were characterized by transmission electron microscopy (TEM) analysis, X-ray diffraction (XRD), high-resolution X-ray photoelectron spectroscopy (XPS), Fourier transform infrared (FTIR) spectroscopy, and UV–vis spectrophotometry. Radical scavenging, cell viability, and anti-pollution activity assays were also conducted to demonstrate the functionalities of black VC. The developed black VC exhibited lower cytotoxicity and better antioxidant, metal chelating ability, and anti-pollution activities than its precursor. These results provide a new approach for developing advanced antioxidants for innovative cosmetic formulations using a simple microwave treatment method. However, black VC retained some problems of its precursor in the form of low stability, which is likely to be a challenge for its cosmeceutical application.

Tuberculosis is a potentially deadly infectious disease caused by the Mycobacterium tuberculosis (M. tuberculosis). Tuberculosis is diagnosed by proving the M. tuberculosis in sputum samples based on the results of acid-resistant staining, culture, and nucleic acid amplification tests. However, there is a report that the detection rate of M. tuberculosis is low in acid-resistant staining using tissue specimens. It has been suspected that the cause is a potential loss of acid resistance by the organic solvents used for tissue specimen preparation. Therefore, this study was pursued to find out if Gram staining and fluorescent staining in addition to acid-resistant staining would be helpful in diagnosing tuberculosis. We used four tissue (lung, small intestine, large intestine, and lymph node) samples with chronic granulomatous inflammation observed in HE staining and positive results in real-time PCR. These detection rates and staining properties were investigated through microscopic examination using the Ziehl-Neelsen, Gram, and Auramin rhodamine staining. In this studies, M. tuberculosis were observed by Ziehl-Neelsen, Gram, and Auramin rhodamine staining in all four samples. In the evaluation of clinical microbiology proficiency testing (CMPT), the Ziehl-Neelsen and Gram staining were the same result, but the Auramin rhodamine staining was relatively low. These data indicated that Gram staining is useful for detecting M. tuberculosis in formalin-fixed tissue specimens. Therefore, if the Ziehl-Neelsen and Gram staining are combined as the M. tuberculosis staining method in tissue specimens, a better direction may be provided for tuberculosis diagnosis.

Background: Posterior capsule tightness (PCT), commonly seen in overhead athletes, is a soft tissue adaptation that is also noted in non-throwers. PCT is associated with scapular and humeral kinematic alterations, significant restriction of shoulder internal rotation (IR) range of motion (ROM), and significant scapular anterior tilting. Sleeper and cross-body stretches (CBS) are suggested for PCT and IR deficits, and have been modified since introduction. A novel modified sleeper stretch (NMSS) was designed in this study to prevent the risk of anterior translation of the humeral head. Though the effects of posterior shoulder stretching exercise have been widely studies, to the best of our knowledge, no previous studies have investigated the effectiveness of posterior shoulder exercises in decreasing scapular anterior tilting. Objects: To compare the immediate effects of two posterior shoulder stretching exercises (NMSS and CBS) on scapular anterior tilting and shoulder IR ROM. Methods: Thirty-two subjects with anteriorly tilted scapula and IR deficits [mean age: 24.3 ± 2.5 years; 15 males and 17 females] participated in this study. Subjects were randomly assigned to either the NMSS or CBS groups. Scapular anterior tilting (at rest and at shoulder 60° active IR) and shoulder IR ROM were measured before and immediately after intervention. Results: Scapular anterior tilting significantly decreased, while the shoulder IR ROM significantly increased in both groups. However, there was no significant group-by-time interaction effect or significant difference between the groups. Conclusion: Both stretching exercises were effective in restoring shoulder IR ROM and decreasing scapular anterior tilting.

『12월 12일』은 이상의 첫 번째 소설로 조선총독부에서 발행한 월간지 『조선』 1930년 2월호부터 12월호까 지 9회에 걸쳐 연재된 장편 소설이다. 『2월 12일』은 적빈으로 처자식, 노모를 잃은 ‘X’가 일본에서 자본주 의의 본질과 모순을 경험하고 고국에 돌아오지만 형제간의 갈등 속에 거의 모든 것을 잃고 자살한다는 내용의 소설이다. X는 향락과 낭비를 통해 자본주의의 소비 문제를 깨닫고 육체를 손상하면서까지 물질문 명의 폭력성을 몸소 체험하는 등 자본주의의 원리를 체득하고 돌아온다. 하지만 동생 T는 돈이 자본이 되어 돈을 버는 자본주의 경제 구조를 이해하지 못한 채 형의 제안을 거부하고 대립한다. X와 T, X와 T의 아들 업의 갈등 끝에 이들은 파국적 결말을 맞이한다. 본 연구는 이상의『12월 12일』의 후반부 주요 서사인 형제간 갈등의 원인을 분석하였다. X와 T 형제간의 갈등과 X와 조카 업 사이의 숙질 간의 갈등의 주된 원인은 돈을 중심으로 한 경제문제와 유교적 가부장제에서 벗어나려는 근대적 주체의 형성 문제에서 비롯되었음을 확인할 수 있었다.

In this research, the a novel finishing machine was used for hight-precision surface of spherical ball products that have been widely used for on/off valve for hydrogen energy flowing system and in medical field such as artificial hip joint component. The spherical balls products are the workpiece that made by Co-Cr-Mo alloys with 32-mm in diameter and Sa≈ 0.30μm in surface roughness. Their surface roughness was successfully improved via the magnetic abrasive tools that controlled the magnetic field of permanent magnets. The critical input conditions were selected as rotational speed: 800rpm, gap: 3mm, tool grain size: 1-μm finishing time: 0, 3, 6, 9, 12, and 15min. The results of this research showed that under the given finishing conditions, the high surface quality in the terms of surface precision of spherical ball products are successfully achieved, in which the surface roughness is reduced from 0.30-μm to 0.04-μm within the short finishing time at 12min. Therefore, it can be concluded that a novel finishing machine is feasible to be used for improving the surface roughness of spherical ball products, resulted in high surface precision of materials.

Quality standards of activated carbon for gas-phase applications have been deleted from the Korean national standard list since 2007, and the iodine adsorption test is the only measure currently used for quality assurance. This study was performed to propose a suitable test method and a quality standard for gas-phase activated carbon. The "1/2 saturated vapor adsorption" test has been developed as a simple and convenient method to determine the adsorption capacity of activated carbon. In this study, the developed test method was evaluated using model VOCs including toluene, methyl ethyl ketone (MEK), and ethyl acetate (EA). A virgin activated carbon revealed adsorption capacities of 344mg/g, 322mg/g, and 328mg/g for toluene, EA, and MEK, respectively, and the adsorption capacity for a mixture of the three VOCs was 334 mg/g. When a regenerated activated carbon was applied, the adsorption capacities dramatically decreased to 62 mg/g, 52 mg/g, and 61 mg/ g for toluene, EA, and MEK, respectively. In addition, the 1/2 solvent vapor adsorption tests using 13 different specimens of activated carbon showed that their capacities were closely related to the iodine adsorption numbers, and this study suggested the adsorption capacity of 300 mg/g as a new quality standard. The novel test method and its standard may help to guarantee the quality of gas-phase activated carbon used for VOCs abatement processes.

沈從文의 습작기 소설 속 여성형상은 작품의 지역적 배경과 인물의 결혼 여부에 따라 서로 다른 특징을 지니고 있다. 北京을 배경으로 한 작품 속 여성은 대부분 작 가의 성적 욕구와 밀접한 관련이 있다. 기혼여성의 경우, 모두가 성에 자유롭고 적극 적인데, 이는 작가의 성적 욕구를 투사한 결과로 보인다. 미혼여성의 경우, 작가가 감히 근접하지 못할 아름다움의 화신으로서 등장하고 있다. 이는 작가가 젊고 아름 다운 여성을 학예의 여신 뮤즈로 승화한 것으로 추측할 수 있다. 湘西를 배경으로 한 작품 속 여성은 작가의 성적 욕구를 초월한 존재로 그려지고 있다. 기혼여성은 자애로운 어머니, 현명한 주부, 사랑스러운 부인의 모습으로 그려지고 있는데, 이는 도시 생활에 지친 작가가 행복한 추억의 공간으로 심리적 퇴행을 하고 있음을 보여 준다. 미혼여성은 湘西의 자연과 결합하여 정체를 알 수 없는 신비한 존재로 그려지 고 있는데, 이는 湘西라는 신화적 상상의 공간에서 작가가 내면의 아니마를 적극적으로 탐색하게 되었음을 보여준다

본 연구는 소설 󰡔완득이󰡕를 통해 장애인, 결혼이주여성, 다문화가족 등 한국사회에서 소외될 수밖에 없 는 사회적 조건들을 가진 완득이네 가족이 정체성을 회복하면서 사회로 나오는 과정을 살펴보고 있다. 장애 인 아버지, 결혼이주여성인 베트남 어머니, 혼혈아(본인) 등의 이유로 완득이는 친한 친구도 없이 심리적으 로 혼자 숨어 지내고 있다. 이러한 완득이를 담임인 이동주 선생이 수시로 이름을 불러 밖으로 나오게 만든 다. 완득이의 가정이 완전체를 향해 가는 과정은 완득이가 먹는 음식을 통해 나타난다. 완득이가 평소 주식 처럼 먹었던 라면과 즉석밥은 공장에서 만들어진 간편식으로, 불완전한 식사인 동시에 완득이의 불완전한 가족 상태를 의미한다. 담임의 주선으로 어머니를 만나게 되고, 그 후 어머니가 해준 반찬도시락은 절반의 완전함이었다. 어머니와 아버지가 해후한 후 이웃과 함께 폐닭 백숙을 먹으면서 완전한 가족의 모습을 구현 한다. 폐닭 백숙은 아버지의 인생을 상징하는 한편, 온 가족이 함께 먹는 첫 번째 식사였다는 점에서 의미를 지닌다. 이 자리에서 완득이가 ‘어머니’라고 공개적으로 말함으로써 완득이의 가족은 완전체가 된다. 또한 완득이는 적성에 맞는 킥복싱을 배우며 타인과 소통하고 세상에 나갈 준비를 한다. 이같은 논의들을 통해 본 연구는 소설 󰡔완득이󰡕가 우리사회의 주변부 인물들이 자신들의 정체성을 확인하고 탐색하는 작품임을 보여주었다.

Flavobacterium 속(genus)은 Bacteriodetes 문(phylum), Flavobacteriaceae 과(family)의 대표 속(type genus)으로서, 이 속의 세균들은 황색 색소를 함유하는 그람 음성 간균이다. 이 속 세균들은 자 연계의 다양한 환경에서 분리되고 있다. 황색색소를 함유하는 그람음성 간균이 경남 창원시 소재 창원대 학교 교내의 연못에서 분리되었고, 이 세균은 균주 B1으로 명명되었다. 균주 B1을 생리학적, 생화학적 및 계통분석학적으로 분석한 결과, Flavobacterium 속에 속하는 것으로 결론지어졌다. 이 세균의 16S rRNA 유전자 염기서열을 BLAST로 분석해 본 결과, 다른 어떠한 세균과도 16S rRNA 유전자 염기서 열의 상동성이 99.0%를 넘지 않았다. 균주 B1의 주된 지방산은 iso-C15:0(19.6%), summed feature 3(C16:1 ω7c and/or C16:1 ω6c, 16.1%), iso-C17:0 3OH(10.2%), iso-C15:0 3OH(8.4%) 및 iso-C15:1 G(6.6%)인 것으로 밝혀졌는데, 이는 다른 Flavobacterium 종들의 지방산 함량과 확연한 차이가 있는 것을 알 수 있었다. 이 세균의 16S rDNA 염기서열은 genbank에 accession number OP060681로 등록 되었다.