A5004308873- Toxic Organic Pollutants Impact
- Effects and risks of endocrine disrupting chemicals
- Analytical Chemistry and Sensors
- Electrochemical Analysis and Applications
- Electrochemical sensors and biosensors
- Microplastics and Plastic Pollution
- Advanced Chemical Sensor Technologies
- Atmospheric chemistry and aerosols
- Chemistry and Chemical Engineering
- Metal-Organic Frameworks: Synthesis and Applications
- Per- and polyfluoroalkyl substances research
- Congenital Anomalies and Fetal Surgery
- Congenital gastrointestinal and neural anomalies
- Allergic Rhinitis and Sensitization
- Analytical Chemistry and Chromatography
- Magnetism in coordination complexes
- Molecular Sensors and Ion Detection
- Viral gastroenteritis research and epidemiology
- Microbial bioremediation and biosurfactants
- SARS-CoV-2 and COVID-19 Research
- Intestinal Malrotation and Obstruction Disorders
- SARS-CoV-2 detection and testing
- Polymer Science and PVC
- Crystal structures of chemical compounds
- Asthma and respiratory diseases
Shimadzu (Japan)
2024
Hodogaya Chemical (Japan)
2019-2022
University of Tsukuba
2014-2021
National Institute of Advanced Industrial Science and Technology
2013-2021
Nagasaki University
2021
Yokohama National University
2006-2008
Mitsubishi Chemical Group Science and Technology Research Center (Japan)
2008
Seattle Children's Hospital
1997
Au nanoparticle (AuNP)-embedded carbon films were formed with a one-step reproducible process by using unbalanced magnetron (UBM) cosputtering to make it possible detect As(3+) in water. The sputtered components NPs (typically 5 nm diameter) spontaneously the films, owing poor intermiscibility of carbon. surface contents embedded AuNPs film widely controllable (Au = 13-21 at %) regulating target powers and individually. obtained had flat (Ra 0.1 nm) despite fact partially exposed surface. By...
This study was conducted with the aim of achieving simultaneous screening various additives in polymer materials by utilizing a solvent-free pyrolyzer/thermal desorption gas chromatography mass spectrometry (Py/TD-GC–MS) method. As first step to achieve this goal, has been examined selecting major substances representing plasticizers and flame retardants, such as short chain chlorinated paraffins (SCCPs), decabromodiphenyl ether (DecaBDE), hexabromocyclododecane (HBCDD), di(2-ethylhexyl)...
This study describes a methodology for evaluating regulatory levels of phthalate contamination. By collecting experimental data on short-term migration using thermal desorption-gas chromatography-mass spectrometry (TD-GC-MS), the di(2-ethylhexyl) (DEHP) from polyvinyl chloride (PVC) to polyethylene (PE) was found be expressed by Fickian approximation model, which originally proposed solid (PVC)/liquid (solvent) phthalates. Consequently, good correlation obtained model with diffusion...
The purpose of this study is to offer a quick and efficient way screen out harmful additives in polymer materials help reducing the burden confirming compliance with chemical regulations. Previous studies have demonstrated possibility using pyrolyzer/thermal desorption gas chromatography–mass spectrometry (Py/TD-GC–MS) simultaneously determine various restricted on regulatory levels. However, reality, such screening technique has not yet been implemented, except for certain phthalates....
The effect of the sp(2)/sp(3) ratio in an unbalanced magnetron sputtered nanocarbon film electrode was studied for determining Cd(2+) and Pb(2+) by anodic stripping voltammetry (ASV). signal-to-noise ASV measurement improved as sp(3) concentration carbon increased because noise current decreased with increasing concentration. detection limits a containing 50% were 0.25 1.0 μg L(-1) high repeatability (Cd: 4.6% Pb: 6.4%, n = 3). For real sample measurement, pretreatment system combining...
Nanocarbon films formed by using unbalanced magnetron sputtering equipment were employed to detect Cd and Pb anodic stripping voltammetry. The electrode performance was evaluated in acetate citrate buffers. Cd-acetate complex easily reduced because the complexation constant moderate. This is quite different from Cd-EDTA which cannot be deposited onto an electrode. In contrast, buffer at lower pH suitable for detecting ion due weak interaction between Pb2+ anion. As a result, (pH 5.0) 2.0)...
This paper describes a simple method for quantifying phthalates via the conversion of anhydrous to dye. The phthalate was hydrolyzed with sodium hydroxide and dehydrated form phthalic anhydride, which converted marker, namely fluorescein, by reaction resorcinol. Concentrated sulfuric acid used as catalyst. presence determined absorbance spectrophotometry. detection limit this di(2-ethylhexyl) 0.1 μmol, relative standard deviation respect reproducibility approximately 10% (n = 3). For other...
The degradation of SARS-CoV-2 specific ribonucleic acid (RNA) was investigated by a numerical modeling approach based on nucleic amplification test (NAAT) results utilizing the SmartAmp technique. precision measurement verified relative standard deviation (RSD) repeated measurements at each calibration point. and detection limits were found to be 6% RSD (seven measurements) 94 copies/tube, respectively, lowest RNA curves obtained from NAAT data four different temperatures in good agreement...
The molecule of the title comound, [Cu(C36H20N4)], is not entirely planar in crystal structure (i.e. D4h), but slightly deformed, with only Ci symmetry. molecules are stacked along b axis a herring-bone fashion.
<title>Abstract</title> This paper presents a screening method for diverse classes of per- and polyfluoroalkyl substances (PFAS) in consumer products using Pyrolysis Gas Chromatography Mass Spectrometer (Py-GC-MS). During the pyrolysis process, polar functional groups (carboxylic or sulfonic) are thermally dissociated, allowing non-polar perfluoroalkyl moieties to elute through GC column. We successfully detected various PFAS, from non-polymeric forms different chain lengths polymeric forms,...
This study aims to provide a simple way identify the possibility of tetrabromobisphenol A (TBBPA) present in polymers without need for complicated separation with expensive equipment. Since presence phenolic hydroxyl groups is known be identifiable by reduction Fe3+ Fe2+ ferric coloring reagent, TBBPA being polymer can screened photometric measurement. mixed solution iron(III) nitrate and potassium hexacyanide(III) acid was used as reagent. With this method, concentration estimated from...
We developed carbon film-based electrodes by using an unbalanced magnetron (UBM) and electron cyclotron resonance (ECR) sputtering equipment, applied for the electroanalysis of four kinds heavy metal ions: cadmium (Cd2+), lead (Pb2+), arsenic (As3+) selenium (Se4+). Au nanoparticle embedded (AuNP-C) film was formed UBM co-sputtering. Regarding detection (Cd2+) (Pb2+) ions, anodic stripping voltammetry measurement performed with our thin electrode. The limits Cd2+ Pb2+ were 0.25 ppb 1.0 on...
C 59 H 63 CuN 7 O 3 , monoclinic, C12/c1 (no.15), a = 32.215(3)Å, b 7.0289(8) Å, c 25.735(3)Å, 125.230(6)°,V 4760.1 Å Z 4, Rgt(F) 0.073, wR ref (F 2 ) 0.220, T 93 K.
Proteins possess sophisticated functions in order to maintain strict life phenomenon.Therefore, the molecules have an aspect as fine materials, example of application tools signal amplification and molecular recognition analytical chemistry.On other hand, many artificial materials unique functions, which are different from that biomolecules.Thus, complex formation between proteins has a great potential create attractive materials.We developed novel hybrid composed proteins, mainly enzymes,...