One-step hydrothermal synthesis of Ag decorated TiO₂ nanoparticles for dye-sensitized solar cell application

Dong, Yong Xiang,Wang, Xuan Liang,Jin, En Mei,Jeong, Sang Mun,Jin, Bo,Lee, See Hoon Elsevier 2019 RENEWABLE ENERGY Vol.135 No.-

<P><B>Abstract</B></P> <P>Over the past few years, many efforts have been made to develop efficient visible light-activated photovoltaic materials. In this study, the Ag-TiO<SUB>2</SUB> nanoparticles were synthesized by using the hydrothermal method. Ag-TiO<SUB>2</SUB> nanoparticles showed significantly higher visible light absorption and better photovoltaic activity than anatase TiO<SUB>2</SUB>. TiO<SUB>2</SUB> nanoparticles were decorated with different concentrations of Ag to improve their photovoltaic properties. All the as-prepared TiO<SUB>2</SUB> and Ag-TiO<SUB>2</SUB> nanoparticles showed a pure anatase crystalline structure. In addition, the Ag-doped nanoparticles showed broader absorption edges (which shifted to higher wavelengths) than the undoped nanoparticles. The solar conversion efficiency (<I>η</I>) of 0.1M Ag-decorated (Ag<SUB>0.1</SUB>-TiO<SUB>2</SUB>) nanoparticle-based dye-sensitized solar cell (DSSC) was 6.44%, which is ∼22% higher than that of the TiO<SUB>2</SUB> nanoparticle-based DSSC (<I>η</I> of 5.05%).</P> <P><B>Highlights</B></P> <P> <UL> <LI> A hydrothermal method has been used to synthesize Ag-doped TiO<SUB>2</SUB> (Ag-TiO<SUB>2</SUB>) nanoparticles. </LI> <LI> Ag-TiO<SUB>2</SUB> nanoparticles showed high visible light absorption in the visible spectral region. </LI> <LI> Ag-TiO<SUB>2</SUB> nanoparticles showed high photocurrent density (<I>J</I> <SUB> <I>sc</I> </SUB>) and solar conversion efficiency (<I>η</I>). </LI> <LI> Ag doping increased the solar conversion efficiency by 22% than anatase TiO<SUB>2</SUB>. </LI> </UL> </P>

Trilobites of Upper Ordovician Xiazhen Formation, Yushan, South China

Dong-Chan Lee,Jeong Gu Lee,Jusun Woo,Seung Bae Lee,Dong Jin Lee,Xiang Dong Wang 대한지질학회 2008 대한지질학회 학술대회 Vol.2008 No.

不斷深化的中期經濟關系

金向東(JIN xiang-dong) 전남대학교 글로벌디아스포라연구소 2009 전남대학교 세계한상문화연구단 국제학술회의 Vol.2009 No.10

As of the end of 2004, 300 foreign Businesses have set up operations in North Korea. With 120, or 40%, of than Chinese Thus, North Korea’s level of financial dependence on China is steadily increasing in the background of Chinese-North Korean trade expansion is their geographic proximity, the expansion of China’s ability to provide cheap manufactured items, and iron trade through further investment in North Korean resource development. This paper will examine the current status of North Korea’s economic relationship with China from 1990 to the present, and at the end will forecast Chinese-North Korean economic relations.

Plasmonic-coupling-based sensing by the assembly and disassembly of dipycolylamine-tagged gold nanoparticles induced by complexing with cations and anions.

Li, Dong Xiang,Zhang, Jun Feng,Jang, Yoon Hee,Jang, Yu Jin,Kim, Dong Ha,Kim, Jong Seung Wiley-VCH 2012 Small Vol.8 No.9

<P>A surface-plasmon-coupling-mediated sensor system is developed based on Au nanoparticles tagged with a coordinative dipycolylamine and lipoyl-anchored naphthalimide derivative (AuNP@DPA). The AuNPs with tailored ligands exhibit distinct sensing activity via sequential assembly into nanoparticle aggregates induced by metal ion complexing, and disassembly in the presence of pyrophosphate (PPi) anions, which is accompanied by a swift, reversible color change due to a surface plasmon resonance coupling effect. It is found that divalent metal ions are more effective than mono- or tri-valent ions in the aggregate formation process, Mn(2+)-induced aggregates are more sensitive to the capture of PPi anions than other AuNP aggregates, and the disassembly upon anion complexation exhibits a highly selective response. The AuNP@DPA-based molecular recognition system also demonstrates a viable performance for the detection of total selective metal ions present in different types of water analytes.</P>

One-pot Synthesis of Symmetrical 1,4-Disubstituted Piperazine-2,5-diones

Cho, Su-Dong,Song, Sang-Yong,Kim, Kyung-Hyun,Zhao, Bao-Xiang,Ahn, Chul-Jin,Joo, Woo-Hong,Yoon, Yong-Jin,Falck, J.R.,Shin, Dong-Soo Korean Chemical Society 2004 Bulletin of the Korean Chemical Society Vol.25 No.3

사료내 흑운모 분말 첨가가 육성돈의 생산성, 혈액내 면역 및 스트레스 관련지표의 변화, 분중 악취방출 가스 생성에 미치는 영향

장해동 ( Hae Dong Jang ),김진동 ( Jin Dong Kim ),홍종욱 ( Jong Wk Hong ),유종상 ( Jong Sang Yoo ),김효진 ( Hyo Jin Kim ),신승오 ( Seung Oh Shin ),황염 ( Yan Hwang ),주천상 ( Tian Xiang Zhou ),진영걸 ( Ying Jie Chen ),조진호 ( Jin 한국동물자원과학회 2008 한국축산학회지 Vol.50 No.3

Causal Relations between Exposome and Stroke: A Mendelian Randomization Study

Hong-Qi Li,Yi-Wei Feng,Yu-Xiang Yang,Xin-Yi Leng,Prof Can Zhang,Shi-Dong Chen,Kevin Kuo,Shu-Yi Huang,Xue-Qing Zhang,Yi Dong,Xiang Han,Xin Cheng,Mei Cui,Lan Tan,Qiang Dong,Jin-Tai Yu 대한뇌졸중학회 2022 Journal of stroke Vol.24 No.2

Background and Purpose To explore the causal relationships of elements of the exposome with ischemic stroke and its subtypes at the omics level and to provide evidence for stroke prevention. Methods We conducted a Mendelian randomization study between exposure and any ischemic stroke (AIS) and its subtypes (large-artery atherosclerotic disease [LAD], cardioembolic stroke [CE], and small vessel disease [SVD]). The exposure dataset was the UK Biobank involving 361,194 subjects, and the outcome dataset was the MEGASTROKE consortium including 52,000 participants. Results We found that higher blood pressure (BP) (systolic BP: odds ratio [OR], 1.02; 95% confidence interval [CI], 1.01 to 1.04; diastolic BP: OR, 1.03; 95% CI, 1.01 to 1.05; pulse pressure: OR, 1.03; 95% CI, 1.00 to 1.06), atrial fibrillation (OR, 1.18; 95% CI, 1.13 to 1.25), and diabetes (OR, 1.13; 95% CI, 1.07 to 1.18) were significantly associated with ischemic stroke. Importantly, higher education (OR, 0.69; 95% CI, 0.60 to 0.79) decreased the risk of ischemic stroke. Higher systolic BP (OR, 1.06; 95% CI, 1.02 to 1.10), pulse pressure (OR, 1.08; 95% CI, 1.02 to 1.14), diabetes (OR, 1.28; 95% CI, 1.13 to 1.45), and coronary artery disease (OR, 1.58; 95% CI, 1.25 to 2.00) could cause LAD. Atrial fibrillation could cause CE (OR, 1.90; 95% CI, 1.71 to 2.11). For SVD, higher systolic BP (OR, 1.04; 95% CI, 1.00 to 1.07), diastolic BP (OR, 1.06; 95% CI, 1.01 to 1.12), and diabetes (OR, 1.22; 95% CI, 1.10 to 1.36) were causal factors. Conclusions The study revealed elements of the exposome causally linked to ischemic stroke and its subtypes, including conventional causal risk factors and novel protective factors such as higher education.

A New Steroidal Saponin, Yuccalan, from the Leaves of yucca smalliana

Jin, Yu-Lan,Kuk, Ju-Hee,Oh, Kyung-Taek,Kim, Young-Ju,Piao, Xiang-Lan,Park, Ro-Dong 대한약학회 2007 Archives of Pharmacal Research Vol.30 No.5

An extract of the leaves of Yucca smalliana Fern. (Agavaceae) showed potential antimicrobial activity. Employing a bioassay linked fractionation method, one of the active principles, namely yuccalan, was isolated as a new stroidal saponin. Thn structure of the new steroidal saponin was elucidated as 3-0-${\beta}$-D-glucopyranosyl-(1${\longrightarrow}$6)-${\beta}$-D-glucopyranosyl-(3${\beta}$, 5${\alpha}$, 6${\alpha}$, 25S)-spirostan-3,6,27-triol (1) using various spectroscopic techniques, including IR, MS, ID and 2D $^1$H-NMR, and $^{13}$C-NMR. The purified yuccalan showed antifungal activities against both Rhizoctonia silani and Fusarium oxysporum.

중국의 통신가격에 대한 법규제

Dong-gao Wu,Xiang-lan Jin 서울대학교 법학연구소 2011 경제규제와 법 Vol.4 No.1

2000년에 중국 국무원(중앙정부)은 <통신조례>를 제정반포하였다. 본 조례는 비록 전국인민대표대회 및 그 상무위원회에서 제정한 법률은 아니지만 현재 중국 통신영역에서의 유일한 종합성적인 법규범이다. 본 조례는 특히 한개 장절의 편폭으로 통신가격에 관하여 규정하고 있으며 통신가격의 유형, 정부가 통신가격을 결정하는 기본원칙, 통신가격결책기관 및 그 절차 등을 명확히 하고 있다. 그후 2002년에 중국 중앙정부의 통신산업 주요 담당기관인 국가계획발전위원회(현재의 국가발전과 개혁위원회)와 정보산업부(현재의 공업과 정보화부)가 공동으로 <통신가격 비준등록 절차규정>을 제정하였다. 본 규정은 상술한 <통신조례> 중의 통신가격에 관한 규정의 내용을 세밀화하였으며 통신가격 공개,통신업계의 自主定價에 관한 감독 등의 제도를 확립하였다. 상술한 두개의 법규범을 바탕으로 중국은 초보적으로 통신가격에 관한 법제도를 설립하게 되었다. 통신가격의 결정방식에 관하여 상술한 법규범은 비록 政府定價, 政府指導價, 市場調節價등 방식을 규정하고 있지만政府定價방식을 아주 작은 범위에 한정하고 그 밖의 방식의적용범위를 확대하고 있는바 이는 사실상 통신가격 결정에 있어서의 경영업자의 자율적 공간의 확충으로 이해할 수 있다. 政府定價, 政府指導價방식의 통신가격 결정주체에 관하여 상술한 법규정에 의하면 <공업과 정보화부>는 응당 통신가격심의위원회를 설립하여야 한다. 당해 위원회는 통신가격제정 또는 조정에 관한 결책권을 행사한다. 문제는 상술한<규정>이 통신가격방안의 구체설계자로서의 통신가격심의위원회를 명확히 하고 있지만 당해 기구의 구성상황을 규정하지 않고 있으며 또한 비록 당해 기구의 운영방식을 규정하고 있다 하더라도 그 운영절차에 대해서는 구체적으로 규정하고 있지 않다. 따라서 구체적인 가격방안의 제출절차는 역시 불투명하다. 중국의 법규범은 상술한 두가지 유형의 통신가격에 관하여 중국정부가 주동적으로 가격을 결정하는 제도를 확립하였을 뿐만아니라 정부의 규제대상인 통신업자에게 가격조정신청권한을 부여하였으며 해당 권리의 실현 경로를 명확히하였다. 문제는 비록 대체적인 가격조정신청절차와 신청서의내용을 규정하고 있으나 관련된 많은 구체절차가 불명확하다는 것이다. 상술한 법규정에 의하면 정부는 등록, 처벌 및 가격조정명령 등 수단으로 통신업자의 자주적 가격결정행위에 대하여 감독권을 행사한다. 문제는 상술한 규정이 등록제도만 규정하였을뿐 통신업자가 어떠한 절차로 등록하는가에 대해서는 규정하지 않고 있다. Chinese State Council formulated ‘Telecommunications Regulations’ in 2000. Though this regulation was not the law which the National People’s Congress and the Standing Committee of the National People’s Congress made, it is the only comprehensive legal norms right now. Its publication terminated the state which Chinese telecommunication didn’t have own law. SDPC and MII formulated ‘Examining and keeping Records Procedure Regulation of Telecommunication Fees’ in 2002. This regulation got into detail a bit and established telecommunication fees’ open system, supervision system for independent pricing of telecommunication business operators. Therefore, China has established a preliminary law system of telecommunication fees. The above regulations set three certain kinds of government pricing, government guidance pricing and market regulation pricing. Government pricing is limited to small range, but government guidance pricing and market regulation pricing’ applicable scope are enlarged. This actually enlarged independent space of communication business operators. According to the regulations, MIIT should found Review Committee of Communication Fees which decides whether to set or adjust fees. The problem is that the regulations although explicit the Review Committee of Communication Fees as designer of two kinds of communication fees scheme, its composition and operate procedure are not regulated. Consequently, proposing procedure of specific price scheme is very opaque. As for above two kinds of communication fees, Chinese government not only established government active pricing system, but also gave the application rights of adjusting pricing to communication business operators who are supervised by government and answered how to realize the rights. The problem is that application procedure and application content of adjusting pricing of communication business operators are regulated by and large, but a lot of specific procedures are not clear. In addition, according to the regulations, government supervises the independent pricing behavior of communication business operators by keeping records, punishing and requiring adjusting pricing, etc. The problem is that the regulations only stipulated keeping records system, and the communication business operators how to keep records is unknown.

Pronuclear Formation and DNA Synthesis in Pig Oocytes following Intracytoplasmic Injection of Pig or Mouse Spermatozoon

Xiang Sun Cui,Bong-Ki Kim,Sun Hong Jun,Dong Il Jin,Chang Sik Park,Nam-Hyung Kim 한국동물번식학회 2002 Reproductive & Developmental Biology(Supplement) Vol.26 No.1s