General template-free strategy for fabricating mesoporous two-dimensional mixed oxide nanosheetsviaself-deconstruction/reconstruction of monodispersed metal glycerate nanospheres

Kaneti, Yusuf Valentino,Salunkhe, Rahul R.,Wulan Septiani, Ni Luh,Young, Christine,Jiang, Xuchuan,He, Yan-Bing,Kang, Yong-Mook,Sugahara, Yoshiyuki,Yamauchi, Yusuke The Royal Society of Chemistry 2018 Journal of materials chemistry. A, Materials for e Vol.6 No.14

<P>In this work, we propose a general template-free strategy for fabricating two-dimensional mesoporous mixed oxide nanosheets, such as metal cobaltites (MCo2O4, M = Ni, Zn) through the self-deconstruction/reconstruction of highly uniform Co-based metal glycerate nanospheres into 2D Co-based metal glycerate/hydroxide nanosheets, induced by the so-called “water treatment” process at room temperature followed by their calcination in air at 260 °C. The proposed ‘self-deconstruction/reconstruction’ strategy is highly advantageous as the resulting 2D metal cobaltite nanosheets possess very high surface areas (150-200 m<SUP>2</SUP>g<SUP>−1</SUP>) and mesoporous features with narrow pore size distribution. In addition, our proposed method also enables the crystallization temperature to achieve pure metal cobaltite phase from the precursor phase to be lowered by 50 °C. Using the 2D mesoporous NiCo2O4nanosheets as a representative sample, we found that they exhibit 6-20 times higher specific capacitance and greatly enhanced capacitance retention compared to the NiCo2O4nanospheres achieved through the direct calcination of the Ni-Co glycerate nanospheres. This highlights another advantage of the proposed strategy for enhancing the electrochemical performance of the mixed oxide products for supercapacitor applications. Furthermore, the asymmetric supercapacitor (ASC) assembled using the 2D NiCo2O4nanosheets//graphene oxide (GO) exhibits a maximum energy density of 38.53 W h kg<SUP>−1</SUP>, while also showing a high capacitance retention of 91% after 2000 cycles at 5 A g<SUP>−1</SUP>. It is expected that the proposed general method may be extended to other transition metal elements for creating 2D mixed oxide nanosheets with enhanced surface areas and improved electrochemical performance.</P>

Catecholamines (DOPAMINE) Increases the Virulence of Aeromonas hydrophila ATCC AH-1N, the Causative Agent of Motile Aeromonas Septicemia (MAS)

Ramona Yan,Darmayasa Ida Bagus Gede,Widiantari Ni Putu,Shanti Ni Nengah Bhawa Dwi,Hani Ni Luh,Julyantoro Pande Gde Sasmita,Oktariani Adnorita Fandah,Shetty Kalidas 한국미생물·생명공학회 2024 한국미생물·생명공학회지 Vol.52 No.2

It has been widely documented that stress conditions in aquatic ecosystems could trigger the release of stress hormone (dopamine) in fishes. Such hormone could attract pathogens (such as Aeromonas hydrophila) to initiate its infection in fishes. The major focus of this study was to investigate the effect of the catecholamine derived stress hormone (dopamine) on the motility and hemolytic activity associated with the virulence of A. hydrophila ATCC AH-1N, the causative agent of Motile Aeromonas Septicemia (MAS). The density of bacterial cells used in this study was adjusted at 106 cells/ml. The results showed that dopamine increased swimming motility of A. hydrophila ATCC AH-1N and was proportional to both dopamine hormone concentration and the incubation period. Dopamine concentration of 100 µM in the medium resulted in the highest increment of swimming ability of A. hydrophila ATCC AH-1N. The dopamine hormone was also found to affect the hemolytic activity of A. hydrophila ATCC AH-1N. The optimum hemolytic activity of the pathogen was found at 50 µM dopamine concentration in the medium, and this hemolytic activity was found to decrease when the concentration of dopamine at greater than 50 µM. It can be concluded from this study that dopamine hormone increased the motility and hemolysis capability, as well as the growth rate of A. hydrophila, and hence increased its virulence.

Synthesis and application of 8-hydroxyquinoline modified magnetic mesoporous carbon for adsorption of multivariate metal ions from aqueous solutions

Wenlu Guo,Xiangguo Meng,Yan Liu,Liang Ni,Zhaoyong Hu,Rui Chen,Minjia Meng,Yun Wang,Juan Han,Min Luo 한국공업화학회 2015 Journal of Industrial and Engineering Chemistry Vol.21 No.1

The new 8-hydroxyquinoline (8-HQ) modified magnetic mesoporous carbon (8-HQ-Ni-CMK-3) wasprepared and applied for adsorption of multivariate metal ions from aqueous solution. The preparedadsorbent was characterized by Fourier transform infrared, X-ray diffraction, scanning electronmicroscopy, transmission electron microscope, nitrogen adsorption-desorption isotherm, elementalanalysis, and vibrating sample magnetometer. The static adsorption behaviors toward multivariatemetal ions on graphite, the modified graphite by 8-HQ, magnetic mesoporous carbon, and 8-HQ-Ni-CMK-3 were compared, which showed that 8-HQ-Ni-CMK-3 had excellent adsorption capacity. Theremoval of multivariate metal ions using 8-HQ-Ni-CMK-3 by fixed-bed column was further investigated.

An empirical study on the international competitiveness of China's creative design industry

Ni, Yan,Zhang, Yizhou 한국문화산업학회 2023 문화산업연구 Vol.23 No.1

Creative design industry, also known as creative industry, creative economy, etc. It refers to enterprises that obtain development impetus from individual creativity, skills and talents, and activities that can create potential wealth and employment opportunities through the development of intellectual property. It usually includes advertising, architectural art, art and antique markets, handicrafts, fashion design, film and video, interactive software, music, performing arts, publishing, software and computer services, television and radio, etc. In addition, it also includes tourism, museums and art galleries, heritage and sports. This international competitiveness reflects a country's economic soft power.The purpose of this study is to carry out a longitudinal analysis of the change trend of the international competitiveness of creative design industry in China from 2017 to 2021. The objects of evaluation in this article are glass industry, architecture industry, fashion industry, jewelry industry, toy industry, and furniture industry. These data are from the United Nations Commodity Trade Statistics Database and the China Economic Network Database. The measurement indicators include the international market share index, trade competitiveness index Including Net Export Revealed Comparative Advantage Index, which aims to analyze the international competitiveness of China's creative design industry through the international competitiveness evaluation index in the international competition theory. According to the calculation results, the international competitiveness of China's creative design industry is on the rise, but many industries are still at the lower level of the international value chain, It can be seen that there is a clear gap between the overall strength and the international powers.Therefore, China's creative design industry should further improve its international competitiveness by improving the quality of creative products, strengthening the training of creative talents, establishing brand positioning awareness, protecting design copyright, and expanding the international market.

Serum Amyloid A is a Novel Prognostic Biomarker in Hepatocellular Carcinoma

Ni, Xiao-Chun,Yi, Yong,Fu, Yi-Peng,He, Hong-Wei,Cai, Xiao-Yan,Wang, Jia-Xing,Zhou, Jian,Fan, Jia,Qiu, Shuang-Jian Asian Pacific Journal of Cancer Prevention 2014 Asian Pacific journal of cancer prevention Vol.15 No.24

Purpose: To investigate the prognostic value of serum amyloid A (SAA) in patients with hepatocellular carcinoma (HCC) undergoing surgery. Materials and Methods: Preoperative serum samples of 328 patients with HCC who underwent curative resection and of 47 patients with benign liver lesion were assayed. Serum levels of SAA were measured by enzyme-linked immunosorbent assay and its correlations with clinicopathological characteristics and survival were explored. Results: Levels of SAA were significantly higher in patients with HCC than those with benign liver lesion. There were strong correlations between preoperative serum SAA level and tumor size and more advanced BCLC stage. On univariate analysis, elevated SAA was associated with reduced disease-free survival and overall survival (p=0.001 and 0.03, respectively). Multivariate analyses showed that serum SAA level was an independent prognostic factor for overall survival (hazard ratio 2.80, p=0.01). Conclusions: High SAA serum level is a novel biomarker for the prognosis of HCC patients.

Motion behavior research of liquid micro-particles filtration at various locations in a rotational flow field

Yan Yan,Yuanzai Lin,Jie Cheng,Zhonghua Ni 국제구조공학회 2017 Structural Engineering and Mechanics, An Int'l Jou Vol.62 No.2

This study presents a particle-wall filtration model for predicting the particle motion behavior in a typical rotational flow field-filtration in blower system of cooker hood. Based on computational fluid dynamics model, air flow and particles has been simulated by Lagrangian-particle/ Eulerian-gas approaches and get verified by experiment data from a manufacturer. Airflow volume, particle diameter and local structure, which are related to the particle filtration has been studied. Results indicates that: (1) there exists an optimal airflow volume of 1243 m3/h related to the most appropriate filtration rate; (2) Diameter of particle is the significant property related to the filtration rate. Big size particles can represent the filtration performance of blower; (3) More than 86% grease particles are caught by impeller blades firstly, and then splashed onto the corresponding location of worm box internal wall. These results would help to study the micro-particle motion behavior and evaluate the filtration rate and structure design of blower.

Fabrication of extremely sharp diamond micro mills via laser-assisted grinding

Ni Chen,Yang Wu,Ning He,Julian Polte,Bo Yan,Liang Li,Eckart Uhlmann 대한기계학회 2022 대한기계학회 춘추학술대회 Vol.2022 No.11

Investigation on the Dispersion Characteristics in Optical Fiber Telecommunication

Ni Yan Rong,Min Ru 보안공학연구지원센터 2015 International Journal of Future Generation Communi Vol.8 No.4

Dispersion is widely existed in the optical fiber. The reason is various, such as material dispersion, waveguide dispersion, mode dispersion, and so on. It will lead to the signal waveform distortion and pulse broadening and then limit the transmission capacity and bandwidth in the optical fiber. With the rapid development, transmission rate can reach even hundreds of Gb/s, and it may lead to many problems. Correspondingly, compensation methods have been paid much attention, and there are also many methods proposed for the compensation. However, we should know the characteristics of the dispersion in order to get compensation algorithms with much higher efficiency. Optical fiber systems with better performance will be designed and manufactured. In this paper, appropriate methods are adopted to analyze the photonic crystal fiber. With the adjusting of the structure parameters, we can design a highly nonlinear photonic crystal fiber with different dispersion characteristics. We study the characteristics of the dispersion of optical fiber communication. According to the analysis to obtain the dispersion characteristics of optical fiber under different parameters.

A Comparative Study on Ternary Low-Platinum Catalysts with Various Constructions for Oxygen Reduction and Methanol Oxidation Reactions

Yan-Ni Wu,Hai-Fu Guo,Peng Hu,Xiao-Peng Xiao,Zhao-Wang Xiao,Shi-Jun Liao 성균관대학교(자연과학캠퍼스) 성균나노과학기술원 2016 NANO Vol.11 No.7

Three types of ternary low-platinum nanocatalysts, alloy PdPtIr/C, core–shell PdPt@PtIr/C and Pd@PtIr/C, have been prepared, and their catalytic behaviors toward methanol oxidation reaction (MOR)/oxygen reduction reaction (ORR) are comparatively investigated via cyclic voltammetry and chronoamperometry analysis in an acidic medium. Through a two-step colloidal technique, the synthesized core–shell structured catalyst PtPd@PtIr/C with alloy core and alloy shell show the best catalytic activity toward MOR and the best poisoning tolerance. The alloy PdPtIr/C catalyst prepared via a one-step colloidal technique exhibits the best performance toward ORR among the three catalysts. All the three catalysts are characterized by transmission electron microscopy (TEM), X-ray diffraction (XRD) and other characterization techniques.

Structural, Half-metallic and Magnetic Properties of the Imperfect Pb₂FeReO<SUB>6</SUB> Containing Eight Different Inherent Defects

Yan Zhang,Hua-Xin Chen,Li Duan,Lei Ni,Ji-Bin Fan,Jie Wang,Guang-Teng Ci,Vincent Ji 한국자기학회 2019 Journal of Magnetics Vol.24 No.3

The structural, half-metallic (HM) and magnetic properties of the imperfect Pb₂FeReO6 containing eight different inherent defects of the FeRe or ReFe antisites, Fe1-Re1 or Fe1-Re4 interchanges, VFe, VRe, VO or VPb vacancies have been studied by first-principles calculations. No obvious structural changes are observed for FeRe or ReFe antisites, Fe1-Re1 or Fe1-Re4 interchanges and VPb vacancy defects, however, the six (two) nearest neighbors O (Fe or Re) of the vacancy move away from (close to) VFe or VRe (VO) vacancies. The HM character is maintained for FeRe or ReFe antisites, far Fe1-Re4 interchange, VFe, VO or VPb vacancies, while vanished for near Fe1-Re1 interchange or VRe vacancy. So the near Fe1-Re1 interchange or VRe vacancy defects should be avoided to preserve the HM character of the Pb₂FeReO6 and thus usable in spintronics devices. Except for the FeRe antisite case with a slightly higher total moment, the total moments μtot of the imperfect Pb₂FeReO6 with the other seven inherent defects are smaller than 3.96 μB/f.u. of the perfect Pb₂FeReO6.