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Aizawa, Masuo 경북대학교 센서기술연구소 1991 센서技術學術大會論文集 Vol.2 No.1
Current development of biocatalytic and bioaffinity sensors is reviewed with emphasis on electron transfer-type enzyme sensors and optical immunosensors. The electron transfer-type enzyme sensors are exemplified by an enzyme sensor for gaseous ethanol, which comprises a conducting polymer membrane-bound alcohol dehydrogenase and electrodes. Several optical immunosensors such as an electrochemical luminescence immunosensor, optical fiber/wave guide immunosensor, and surface plasmon immunosensor are involved.
Thermoelectric Material Design in Pseudo Binary Systems of on the Powder Metallurgy Route
Aizawa Tatsuhiko,Song Renbo,Yamamoto Atsushi 한국분말야금학회 2006 한국분말야금학회 학술대회논문집 Vol.2006 No.1
New PM route via bulk mechanical alloying is developed to fabricate the solid solution semi-conductive materials with and for 0 < x, y < 1 and to investigate their thermoelectric materials. Since is n-type and both and are p-type, pn-transition takes place at the specified range of germanium content, x, and tin content, y. Through optimization of chemical composition, solid-solution type thermoelectric semi-conductive materials are designed both for n-and p-type materials.
Solid-state Synthesis of Mg2X (X=Si, Ge, Sn and Pb) via Bulk Mechanical Alloying
Aizawa Tatsuhiko,Song Renbo 한국분말야금학회 2006 한국분말야금학회 학술대회논문집 Vol.2006 No.1
Solid-state processing via the bulk mechanical alloying enables us to directly fabricate Mg2X semi-conductive material performs. Precise control of chemical composition leads to investigation on the dilution and enrichment of X in Mg2X. Two types of solid-state reactivity are introduced: e.g. synthesis of Mg2Si from elemental mixture Mg - Si is nucleation-controlled process while synthesis of Mg2Sn from Mg - Sn, diffusion-controlled process. Thermoelectricity of these Mg2X is evaluated for discussion on the validity and effectiveness of this new PM route as a reliable tool for fabrication of thermoelectric compounds.
‘결속성’의 관점에서 본 작문지도 -‘결속장치’에 의한 문장의 연결을 중심으로-
( Aizawa Yuka ) 한국일어교육학회 2012 일본어교육연구 Vol.0 No.23
本稿は、文脈という側面から文のつながりについて考える際に重要な槪念である結束性に注目し、韓國人日本語學習者の作文における結束裝置の使われ方の問題点と結束裝置の誤用を回避するための作文指導とはどのようなものであるかについて考察する。調査の對象は、韓國內の大學3年生による日本語の作文28編で、分析に使用する結束裝置は5種類(指示詞、省略、接續詞、同一語句の反復、關連語句の反復)である。分析の結果は次のとおりである。まず、最もよく使用される結束裝置は同一語句の反復で、誤用率も低く、學習者にとって最も使いやすく間違いにくい結束裝置であることが明らかになった。また、次に使用率の高かったのは接續詞と指示詞であるが、これらは誤用率が高いため、使われやすい反面、間違いやすいものとして、作文敎育の際、注意が必要であることがわかった。次に、各結束裝置の使われ方の問題点と誤用回避のための指導方案について以下にまとめる。なお、關連語句の反復に關しては誤用が見られなかった。①指示詞では、「ソ」を「ア」としてしまう誤用が全體の8割を越えた。日本語と韓國語の指示詞の使われ方の相違を學習者のレベルに應じて指導していく必要がある。②省略では、誤用が生じた場合、讀み手の讀解に與える影響が大きいことがわかった。從って具體的な誤用の文章例を提示しながら、過度な省略に氣をつけるよう注意を促す必要がある。③接續詞では、8割弱に意味の取り違いの誤用が見られた。そのほとんどが、母語からの直譯により誤用が生じたものだった。また、「そして」と「また」の相違もきちんと理解されていなかった。結束裝置のうち、接續詞は最も誤用が多いため、使い分けに關する十分な指導が求められる。④同一語句の反復では、過剩に反復されていた誤用が全體の7割を越え、最も多かった。同一語句が繰り返される場合、省略したり、指示詞を使うなどの方法を提示する必要がある。
BEHAVIOR AND ASSESSMENT OF PESTICIDES IN DRINKING WATER PRODUCTION SYSTEM
AIZAWA,Takako,MAGARA,Yasumoto 嶺南大學校 環境問題硏究所 1995 環境硏究 Vol.15 No.1
The concentration of the pesticides remaining in river water and raw water for tap water supply, located in agricultural area, was measured. As a result, 11 kinds of pesticides were detected. The residual pesticides in water was also degraded by chlorination because of chlorine was a strong oxidant that did not exist in natural condition, and produced by-products. The organo-phosphate pesticides that have P=S bond were easily degraded and produced oxons (P=O) as primary byproduct. Thiobencarb was also degraded by chlorination, and produced chlorobenzyl alcohol, chlorotoluene, chlorobenzyl chloride, chlorobenzoic acid and chlorobenzyl aldehyde as chlorination byproducts. Also, when thiobencarb was detected in raw water, the above byproducts were detected in the filtrated water in a purification plant for water supply. Therefore, the management and control of pesticides in drinking water and ambient water quality management should be scoped the chlorination byproducts.
Satoka Aizawa,Gurmehr Brar,Hidekazu Tsukamoto 거트앤리버 소화기연관학회협의회 2020 Gut and Liver Vol.14 No.1
Cell death is now reclassified into several types based on the mechanisms and morphologic phenotype. Understanding of such classifications offers insights into the pathogenesis of liver disease, as well as diagnostic or therapeutic implications. Apoptosis is recognized relatively easily due to its unique morphology, but lytic cell death may occur in the form of accidental necrosis, mitochondria permeability transition-driven necrosis, necroptosis, pyroptosis, ferroptosis, and parthanatos. The cell may be engulfed by neighboring cells due to a loss of integrin signaling or cancer cell competition by entosis, a type of cell death. The classification also includes mechanistically termed cell death such as autophagy-dependent cell death and lysosome-dependent cell death. These different types of cell death may occur uniquely in certain liver diseases but may coexist in the evolution of the disease. They occur in parenchymal and non-parenchymal liver cells, as well as inflammatory cells, causing distinct pathologic consequences. This review briefly covers the recently revised classifications of cell death and discusses their relevance to liver diseases of different etiologies.
Fabrication of Ruby thin film for temperature indicator application
Hiroaki Aizawa,Kenichi Ito,Sayaka Takahashi,Shuji Komuro,Yukari Miyazaki,Tooru Katsumata 제어로봇시스템학회 2009 제어로봇시스템학회 국제학술대회 논문집 Vol.2009 No.8
Chromium doped sapphire (Ruby) films have been fabricated on Si substrate by laser ablation, and their fundamental optical property and thermal characteristics are evaluated for temperature sensor application. The red emission near 700 nm which originates from 3d transition in Cr<SUP>3+</SUP> ions was clearly observed from the Ruby films. The split of PL peak, originated in 3d-orbital of chromium ion, is also clearly observed from Ruby films. Temperature dependence of PL spectrum from ruby films was measured under Ar laser excitation. PL intensity and PL peak positiongreatly vary with temperature ranging from 293 K to 443 K. To take the advantage of this phenomenon, the temperature sensor with calibration free can be developed.
Optrode sensor for chemical and physical measurement
Hiroaki Aizawa,Hiroaki Ishizawa,Eiji Toba 제어로봇시스템학회 2008 제어로봇시스템학회 국제학술대회 논문집 Vol.2008 No.10
This paper describes an optrode sensor for chemical and physical measurement and its application to industrial examinations. Among many king of optrode sensors, we have fabricated a temperature, oxygen and pH sensor and characteristics of which was experimentally investigated. Our experimental data shows the optrode sensor for chemical and physical measurement has singular capability as compared with a conventional sensor such as an electrode sensor.