Journal of Nanoelectronics and Optoelectronics
·
2021
·Vol. 16
·期 12
·1881-1885
·
IF 0.961
Kang Xue,Teng Fei,Hou Jian-Feng,Tan Xi-Han
Phosphorus in steel is typically recognized as a harmful element for high-quality steel, so monitoring phosphorus content is important for iron- and steel-making processes. The solid electrolyte 4CaO·P2O5 is incorporated into a phosphorus sensor with a Sn–P
alloy reference electrode. The cell configuration is written as: Mo|[P]Sn|4CaO·P2O5|[P]Fe|Mo cermet. The sensor is tested on standard on C/Fe solutions at 1633 K. Even with fluctuating temperatures, the phosphorus probe shows consistent measured
values and the developed calibration curves calculate the wt% of phosphorus based on measured voltage difference in the sensor with good stability and rugged construction.
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ZEITSCHRIFT FUR KRISTALLOGRAPHIE-NEW CRYSTAL STRUCTURES
·
2022
·Vol. 237
·期 6
·1051-1053
·
IF 0.365
Hua-Xiang Zhang
C 33 H 40 CdN 8 O 6 , triclinic,
P
1
‾
(no. 2), a = 10.6468(11) Å, b = 11.6739(9) Å, c = 14.5312(9) Å, α = 93.976(5)°, β = 102.005(7)°, γ = 111.827(8)°, V = 1618.4(2) Å 3 , Z = 2, R
gt ( F ) = 0.0480, wR
ref ( F
2 ) = 0.1102, T = 293(2) K.
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JOURNAL OF URBAN HISTORY
·
2010
·
IF 0.165
Richard Harris
Urban historical scholars have neglected smaller urban centers, including their residential environments and the forces that shaped them. For a time, one of these forces was the mail-order kit home. Kit manufacturers sold houses to families throughout the United States and Canada but enjoyed their greatest success in small towns where detached single-family homes were the norm. They worked to insert themselves into local building industries: They challenged lumber dealers and ignored architects but strove to mollify the contractors on whom they and their customers depended. They attracted considerable attention and met with initial success: Emerging rapidly after 1905, they had hit their stride by 1914 and enjoyed a heyday in the 1920s. They were stricken by, and failed to recover from, the Depression in large part because lumber dealers had learned how to compete with them.
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Management and Organization Review
·
2023
·Vol. 19
·期 1
·98-137
·
IF 2.9
Guoguang Wan,Heli Wang,Xuesong Geng,Kenneth G. Huang
This study examines Chinese corporations’ responses to a sudden natural disaster in terms of their philanthropic donations. We apply Polanyi's double movement perspective to argue that rapid market expansion in an emerging economy causes social problems such as large-income disparities and environmental degradation. This calls forth counterforces advocating social responsibility and sustainability. Such countermovements can be strengthened by a major disaster, especially in the domain of corporate philanthropy. The resulting increase in corporate philanthropy persists long after the disaster, especially for those firms with large intra-firm pay disparities, operating in socially contested industries and located in regions with more social foundations. Using the context of China's 2008 Wenchuan earthquake, we find support for these arguments in a sample of Chinese public firms.
本文研究中国公司对于突发自然灾害的捐款行为。我们采用Polanyi的双向运动视角来阐释该现象。双向运动视角认为新兴经济体市场的迅速扩张会带来贫富悬殊和环境破坏等社会问题，同时这些问题会反过来推动大家支持社会责任和可持续发展。这些反向推动在一场大灾难面前会得到加强，尤其反映在公司捐款行为上。灾后公司捐款的增加会在灾难结束后长时间持续，特别是具有以下特点的公司：公司内部工资差异较大、公司所在行业具有社会争议，公司总部所在地的慈善基金会比较多。本文，发现基于中国上市公司样本在中国2008年汶川地震情境下的捐款数据支持了这些论述。
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Journal of Design History
·
2010
·Vol. 23
·期 1
·43-59
·
IF 0
Tucker Lisa Marie
This article focuses on the design and construction of small houses in the USA during the interwar period. The premise of this work is that the developments which took place during this time inform an understanding of how single-family house design has evolved to this day in the USA, where architects are little involved in the design of most single-family houses. As the American Institute of Architects (AIA) is the primary organization representing the architecture profession in the USA, an examination of the historical positions taken by the membership of the AIA with regard to single-family houses was undertaken. The AIA's single concentrated effort towards improving single-family house design was expressed through its endorsement of the Architects’ Small House Service Bureau (ASHSB) between 1922 and 1934; thus this relationship will be discussed in detail as revealed through archival documents of the AIA and the ASHSB.As the only plan book service ever endorsed by any professional design organization and as the only plan book group composed entirely of licensed architects, the Architect's Small House Service Bureau holds a significant place in the history of domestic design in the USA.
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JOURNAL OF CATALYSIS
·
2018
·
IF 6.759
Somboon Chaemchuen,Xuan Xiao,Marzieh Ghadamyari,Bibimaryam Mousavi,Nikom Klomkliang,Ye Yuan,Francis Verpoort
A robust catalyst generated from the pyrolysis of bimetallic Zn/Co-ZIF comprising magnetic properties demonstrated to be an effective heterogeneous catalyst system for CO 2 conversion reaction without the need of co-catalyst and solvent. Controllable pyrolysis under various conditions resulted in a unique active structure composed of metallic particles stabilized in a nitrogen-doped carbon matrix. The metallic particles acting as acid sites are dispersed in a nitrogen-doped porous carbon-wall which provides the basic sites. These sites are created during the pyrolysis process of Zn/Co-ZIF used as a special template under a controlled atmosphere. The resulting material possessing both, acid and basic sites, showed an excellent catalytic performance for the cycloaddition of CO 2 into epoxides as these sites correspond to the active sites in the catalytic cycle. Additional, the pyrolysis conditions indicated to play an important role in the properties of the resulting materials and in parallel with the catalytic performance. The catalytic material proved to be very robust and maintained high activities for at least eleven cycles using the optimized reaction condition. Moreover, the magnetic property of the resulting catalyst is advantageous especially for the separation from the reaction mixture.
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JOURNAL OF FINANCIAL ECONOMICS
·
2021
·
IF 6.988
José Azar,Miguel Duro,Igor Kadach,Gaizka Ormazabal
This paper examines the role of the “Big Three” (i.e., BlackRock, Vanguard, and State Street Global Advisors) on the reduction of corporate carbon emissions around the world. Using novel data on engagements of the Big Three with individual firms, we find evidence that the Big Three focus their engagement effort on large firms with high CO 2 emissions in which these investors hold a significant stake. Consistent with this engagement influence being effective, we observe a strong and robust negative association between Big Three ownership and subsequent carbon emissions among MSCI index constituents, a pattern that becomes stronger in the later years of the sample period as the three institutions publicly commit to tackle Environmental, Social, and Governance (ESG) issues.
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CARBON
·
2018
·
IF 7.082
Hui Mei,Weizhao Huang,Chengxu Hua,Yawei Xu,Laifei Cheng
Carbonaceous materials with unique microstructure obtained by pyrolyzing renewable and environment-friendly nature plants have promising applications in areas such as battery and catalyst support. However, unexpected cracks accompanied by low oxidation resistance retard further development. In this study, a thin SiC coating for strengthening purpose was in-situ deposited on biomorphic porous carbon materials fabricated by pyrolyzing wood while maintaining low density. Continuously ordered microchannel structures from carbonized nature wood with a diameter of ca. 20 μm was completely replicated after depositing SiC coating, resulting in the good anisotropy in mechanical and thermal properties. The thin SiC coating was found to greatly increase compressive strength from 26.4 to 47.4 MPa and thermal conductivity from 0.49 to 14.94 W/m K in the axial direction with improved oxidation resistance of weight loss from 78.5% to 1.51%. In the radial direction , however, the increase of the two properties was lower due to the longitudinal microchannel structure. Feasibility of the biomorphic carbon serving as catalyst support with highly developed continuous channels was evaluated by loading typical molybdenum disulfide (MoS 2 ). Result shows a significant improvement in both adsorption and photodegradation efficiency against the pure MoS 2 , which is because of the enlarged specific surface area of the catalyst.
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SPECTROCHIMICA ACTA PART A-MOLECULAR AND BIOMOLECULAR SPECTROSCOPY
·
2023
·
IF 4.4
Ting-Ting Sun,Ruo-Jun Man,Jing-Yi Shi,Xiao Wang,Min Zhao,Hong-Yu Hu,Chao-Yue Wang
In this work, through the orthogonal design of two fluorophores and two recognition groups, a series of fluorescent probes were developed from the flavone derivatives for hydrogen sulfide (H 2 S). The probe FlaN-DN stood out from the primarily screening on the selectivity and response intensities. It could respond to H 2 S with both the chromogenic and fluorescent signals. Among the recent reported probes for the H 2 S detection, FlaN-DN indicated the most highlighted advantages including the rapid response (within 200 s) and the high response multiplication (over 100 folds). FlaN-DN was sensitive to the pH condition, thus could be applied to distinguish the cancer micro-environment. Moreover, FlaN-DN suggested practical capabilities including a wide linear range (0–400 μM), a relatively high sensitivity (limit of detection 0.13 μM), and high selectivity towards H 2 S. As a low cytotoxic probe, FlaN-DN achieved the imaging in living HeLa cells. FlaN-DN could detect the endogenous generation H 2 S and visualize the dose-dependent responses to the exogenous H 2 S level. This work provided a typical case of natural-sourced derivatives as functional implements, which might inspire the future investigations.
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Russian Journal of Physical Chemistry A
·
2023
·Vol. 97
·期 13
·3120-3125
·
IF 0.7
Li Zhong,Yuan Tiantian,Tang Shuqin,Chen Xiangting
Abstract A novel 2D bone-like Au nanoplates/graphene oxide composites have been successfully synthesized using a facile ultrasonic-assistant seed-mediated approach. The morphology and structure were investigated by transmission electron microscope (TEM), high-resolution transmission electronic microscopy (HRTEM) and X-ray photoelectron spectra (XPS). Studies found that the as-synthesized 2D Au nanoplates with relatively good distribution are bone-like morphologies with a length of about 50 nm and a width of about 30 nm. The catalytic activity of as-synthesized products was investigated for the reduction of 4-nitrophenol to 4-aminophenol, and it was seen that the 2D bone-like Au nanoplates/graphene oxide composites exhibited significant enhancement in catalytic activity.
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Plasmonics
·
2016
·Vol. 12
·期 3
·717-727
·
IF 2.146
Zhang Yan,Jiang Jingjing,Li Min,Gao Pengfei,Zhang Guomei,Shi Lihong,Dong Chuan,Shuang Shaomin
A highly selective and ultra-sensitive colorimetric assay has been developed for detecting the magnesium ion (Mg 2+ ) based on pectinase (PE)-protected Au nanoparticles (PE-AuNPs). This is the first study reporting the use of pectinase for green synthesizing gold nanoparticles. Aggregation of PE-AuNPs was induced immediately following the addition of Mg 2+ ion under Tris-HCl buffer at pH 4.0, yielding a color change from red to blue, and the characteristic surface plasmon resonance (SPR) peak of PE-AuNPs was red-shifted to 665 nm. The effects of parameters such as pH, the amount of PE-AuNPs, and incubation time on the sensitivity of colorimetric assay were investigated in detail. The Mg 2+ -induced aggregation of PE-AuNPs could be monitored by both the naked eye and UV–vis spectrophotometry. The lowest detection concentration with the naked eye is 0.52 μM. A linear relationship between the absorbance ratio ( A
665 / A
523 ) and Mg 2+ concentration was observed in two ranges of Mg 2+ concentration by UV–vis spectrophotometry, including 5.34 × 10 −7 μM to 51.4 μM and 5.12 × 10 2 μM to 3.19 × 10 3 μM. The Mg 2+ detection limit was determined to be 4.0 × 10 −9 μM with UV–vis spectrophotometer. The proposed colorimetric assay possesses a highly selective response for Mg 2+ over other metal ions. This method has been successfully applied to determine the Mg 2+ ion in some water samples.
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Biomaterials Science
·
2018
·Vol. 6
·期 7
·1846-1858
·
IF 5.831
Hua Li,Feng Peng,Donghui Wang,Yuqin Qiao,Demin Xu,Xuanyong Liu
Magnesium (Mg) and its alloys are promising cardiovascular stent materials due to their favourable physical properties and complete degradation in vivo. However, rapid degradation and poor cytocompatibility hinder their clinical applications. To enhance the corrosion resistance and endothelialization of the AZ31 alloy, a layered double hydroxide (LDH)/poly-dopamine (PDA) composite coating (LDH/PDA) was successfully fabricated. Polarization curves and the electrochemical impedance spectroscopy Nyquist spectrum test proved that the corrosion resistance of the LDH/PDA sample was significantly improved in vitro. The LDH/PDA sample greatly improved the adherence process and the proliferation rate of human umbilical vein endothelial cells (HUVECs). After culturing for 10 days, the number of living HUVECs on the LDH/PDA sample was comparable to that on the Ti sample whereas the cells barely survived on the AZ31 or LDH coating. Furthermore, heparin was immobilized on LDH/PDA via a covalent bond (LDH/PDA/HEP). The corrosion resistance and long-term proliferation of HUVECs after the introduction of heparin were mildly decreased compared with the L/P sample, but were still greatly improved compared with AZ31, the LDH coating and the PDA coating. Furthermore, the LDH/PDA/HEP sample greatly improved the HUVEC migration rate compared with the LDH/PDA sample, and inhibited platelet adhesion which was intense on the LDH/PDA sample. Both LDH/PDA and LDH/PDA/HEP samples had a low hemolysis rate (2.52% and 0.65%, respectively) in vitro and eliminated the adverse biocompatible effects of the direct PDA coating on the AZ31 substrate in vivo. Our results suggest that the LDH/PDA composite coating with further heparinization is a promising method to modify the surface of Mg alloys by significantly improving corrosion resistance, endothelialization and hemocompatibility.
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