Measurement of atmospheric particles and anionic species across central Taiwan

2003 ◽  
Vol 19 (4) ◽  
pp. 351 ◽  
Author(s):  
Guor-Cheng Fang ◽  
Kuan-Foo Chang ◽  
Chungsying Lu ◽  
Hsunling Bai
Keyword(s):  
Atmospheric Particles ◽  
Anionic Species ◽  
Central Taiwan

Occurrences and displacements of landslides by an earthquake with a subsequent rain: the 1999 Chi-chi earthquake in central Taiwan

2004 ◽  
Vol 41 (4) ◽  
pp. 366-374
Author(s):  
Wen-Neng WANG ◽  
Hiroyuki NAKAMURA ◽  
Satoshi TSUCHIYA ◽  
Shang-Chih WU ◽  
Shoung OUYANG
Keyword(s):  
Central Taiwan

Clay liner materials for land disposal of hazardous non-metal wastes

1996 ◽  
Vol 33 (8) ◽  
pp. 71-77
Author(s):  
I. M.-C. Lo ◽  
H. M. Liljestrand ◽  
J. Khim ◽  
Y. Shimizu
Keyword(s):  
Sorption Capacity ◽  
Organic Anion ◽  
Surface Exchange ◽  
Clay Liner ◽  
Effective Removal ◽  
Exchange Constants ◽  
Anionic Species ◽  
Surface Ligand ◽  
Land Disposal

Simple land disposal systems for hazardous and mixed wastes contain heavy metal cationic species through precipitation and ion exchange mechanisms but typically fail by releasing soluble organic and inorganic anionic species. To enhance the removal of anions from leachate, clays are modified with coatings of iron or aluminium cations to bridge between the anionic surface and the anionic pollutants. A competitive surface ligand exchange model indicates that surface coatings of 10 meq cation/gm montmorillonite under typical leachate conditions increase the inorganic anion sorption capacity by at least a factor of 6 and increase the intrinsic surface exchange constants by more than a factor of 100. Similarly, metal hydroxide coatings on montmorillonite increase the organic anion sorption capacity by a factor of 9 and increase the intrinsic surface exchange constants by a factor of 20. For historical concentrations of non-metal anions in US hazardous and mixed waste leachate, sorption onto natural clay liner materials is dominated by arsenate sorption. With cation coatings, anion exchange provides an effective removal for arsenate, selenate, phenols, cresols, and phthalates. Engineering applications are presented for the use of modified clays as in situ barriers to leachate transport of anionic pollutants as well as for above ground treatment of recovered leachate.

O-AcylTEMPOs, a Modified and Fundamental, but Unexplored Carboxylic Derivative: Recent Progress in Synthetic Applications

2019 ◽  
Vol 23 (19) ◽  
pp. 2102-2121
Author(s):  
Hiroyuki Kawafuchi ◽  
Lijian Ma ◽  
Md Imran Hossain ◽  
Tsutomu Inokuchi
Keyword(s):  
Organic Synthesis ◽  
Recent Progress ◽  
Knoevenagel Condensation ◽  
Acid Synthesis ◽  
Amino Acid Synthesis ◽  
Electrophilic Amination ◽  
Weinreb Amides ◽  
Anionic Species ◽  
Diastereoselective Addition ◽  
Carbonyl Function

O-Acylated 2,2,6,6-tetramethylpiperidine-N-oxyls (abbr. O-AcylTEMPOs) are easily available and stable carboxylic derivatives, but their utility in organic synthesis is unexplored in contrast to analogues, such as the N-methoxy-N-methylamides, known as Weinreb amides. Especially, the O–N unit of the O-acylTEMPOs dictates a fairly electronwithdrawing character for the carbonyl function. This enhances the reactivity and stability of the resulting enolate ions. Accordingly, O-acylTEMPOs allow various transformations and this review encompasses seven topics: (1) Reactivity of O-acylTEMPOs towards nucleophiles and chemoselective transformations, (2) Reactivity of anionic species derived from O-acylTEMPOs, (3) E-Selective Knoevenagel condensation of acetoacetylTEMPOs and synthesis of furans, (4) Electrocyclization of 2,4-dienones derived from acetoacetic derivatives and 2-substituted enals, (5) Diastereoselective addition of amide anion to O-(2-alkenoyl)TEMPOs and β-amino acid synthesis, (6) Thermolysis of O-acylTEMPOs, and (7) Applications for Umpolung reactions using O-benzoylTEMPOs, useful for the electrophilic amination of alkenes and alkynes.

A Study of Creative Artworks of Picture Books with Tableware Colored Using Mixed Media

2011 ◽  
Vol 213 ◽  
pp. 177-181
Author(s):  
Rui Lin Lin
Keyword(s):  
Picture Books ◽  
Professional Knowledge ◽  
Mixed Media ◽  
Practical Aspect ◽  
Group Discussions ◽  
Outdoor Activities ◽  
Central Taiwan ◽  
Class Teacher

The purpose of this study is to complete the creative artworks colored using mixed media for the picture books which come as free gifts with the children’s tableware by cooperating with companies in central Taiwan. The personification method was applied to the story marketing design to create a leading character, Baby Cow, with western imagery and eastern quality. The pictures were drawn by hands because it is warm and may imply children’s healthy and vigorous qualities. The design also focuses on several good friends of the leading character, with season changes and corresponding outdoor activities. Moreover, the researcher asked a class teacher from a technology university to guide her students from the design department to make their creative artworks for picture books through group discussions. The results of their designs not only solved the companies’ designing problem but also met the expected goal. And students were able to get to know the industry earlier. The purpose of combining practices with theories for curriculum learning was achieved. And the teacher had learned more about the practical aspect, which helped to improve her professional knowledge.

Characterization, identification of ambient air and road dust polycyclic aromatic hydrocarbons in central Taiwan, Taichung

2004 ◽  
Vol 327 (1-3) ◽  
pp. 135-146 ◽  
Author(s):  
Guor-Cheng Fang ◽  
Cheng-Nan Chang ◽  
Yuh-Shen Wu ◽  
Peter Pi-Cheng Fu ◽  
I-Lin Yang ◽  
...  
Keyword(s):  
Polycyclic Aromatic Hydrocarbons ◽  
Aromatic Hydrocarbons ◽  
Road Dust ◽  
Ambient Air ◽  
Polycyclic Aromatic ◽  
Central Taiwan

scholarly journals Phthalocyanine-Functionalized Magnetic Silica Nanoparticles as Anion Chemosensors

Sensors ◽  
2021 ◽  
Vol 21 (5) ◽  
pp. 1632
Author(s):  
João M. M. Rodrigues ◽  
Andreia S. F. Farinha ◽  
Zhi Lin ◽  
José A. S. Cavaleiro ◽  
Augusto C. Tome ◽  
...  
Keyword(s):  
Magnetic Nanoparticles ◽  
Dimethyl Sulfoxide ◽  
Silica Nanoparticles ◽  
Hybrid Material ◽  
Limit Of Detection ◽  
Active Material ◽  
Anion Detection ◽  
Anionic Species ◽  
Magnetic Silica ◽  
Magnetic Silica Nanoparticles

Anionic species are one of the most common pollutants in residual and freshwaters. The presence of anthropogenic anions in water drastically increases the toxicity to living beings. Here, we report the preparation of a new optical active material based on tri(tosylamino)phthalocyanines grafted to ferromagnetic silica nanoparticles for anion detection and removal. The new unsymmetrical phthalocyanines (Pcs) proved to be excellent chemosensors for several anions (AcO−, Br−, Cl−, CN−, F−, H2PO4−, HSO4−, NO2−, NO3−, and OH−) in dimethyl sulfoxide (DMSO). Furthermore, the Pcs were grafted onto magnetic nanoparticles. The resulting novel hybrid material showed selectivity and sensitivity towards CN−, F−, and OH− anions in DMSO with limit of detection (LoD) of ≈4.0 µM. In water, the new hybrid chemosensor demonstrated selectivity and sensitivity for CN− and OH− anions with LoD of ≈0.2 µM. The new hybrids are easily recovered using a magnet, allowing recyclability and reusability, after acidic treatment, without losing the sensing proprieties.

scholarly journals Characterization of Ambient Particulate Matters in an Industry-Intensive Area in Central Taiwan

Atmosphere ◽  
2021 ◽  
Vol 12 (7) ◽  
pp. 926
Author(s):  
Hsing-Wang Li ◽  
Kang-Shin Chen ◽  
Chia-Hsiang Lai ◽  
Ting-Yu Chen ◽  
Yi-Ching Lin ◽  
...  
Keyword(s):  
Principal Component Analysis ◽  
Principal Component ◽  
Component Analysis ◽  
Water Soluble ◽  
High Tech ◽  
Particulate Matters ◽  
Metallic Elements ◽  
Soluble Ions ◽  
Water Soluble Ions ◽  
Central Taiwan

Atmospheric particulate matters (PMs) were measured in an industry-intensive region in central Taiwan in order to investigate the characteristics and possible sources of PMs. The samplings were simultaneously conducted using a 10- and 3-stage Micro Orifice Uniform Deposit Impactor (MOUDI) from 2017 to 2018. In this study, the characteristics of PMs in this region were evaluated by measuring the mass concentration of PMs and analyzing water-soluble ions and metallic elements, as well as dioxins. Additionally, principal component analysis (PCA) was used to identify the potential sources of PMs. The results showed that the mean concentration of coarse (>1.8 μm), fine (0.1–1.8 μm), and ultrafine (<0.1 μm) particles were 13.60, 14.38, and 3.44 μg/m3, respectively. In the industry-intensive region, the size distribution of ambient particles showed a bi-modal distribution with a high concentration of coarse particles in the spring and summer, while fine particles were dominant in the autumn and winter. The most abundant water-soluble ions of PMs were NO3−, Cl−, and SO42−, while the majority of metallic elements were Na, Fe, Ca, Al, and Mg in different particle sizes. The results of Pearson’s correlation analysis for metals indicated that the particles in the collected air samples were related to the iron and steelmaking industries, coal burning, vehicle exhausts, and high-tech industries. The dioxin concentration ranged from 0.0006 to 0.0017 pg I-TEQ/Nm3. Principal component analysis (PCA) revealed that the contribution to PMs was associated with sea salt, secondary pollutants, and industrial process.

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