IMAI Shoji

The aim of this study was to investigate the effects of dibromoacetonitrile (DBAN), a by-product in water bacterial control, at sublethal concentrations on rat thymocytes, by using a cytometric technique with appropriate fluorescent dyes. By using...

© 2017 The Japan Society for Analytical Chemistry. Chemical components (Na + , NH4 + , K + , Mg 2+ , Ca 2+ , F − , Cl − , NO2 − , Br − , NO3 − , PO43 − , SO 4 2− ) of fresh rime and snow collected on the summit of Mt. Kajigamori (ALT. 1400 m), Koc...

© 2017 The Japan Society for Analytical Chemistry. An investigation of the atomization mechanism of boron using a commercially averable graphite furnace atomization absorbance spectrometer (GFAAS) was difficult due to the upper limit of atomizatio...

© 2016 Contact Lens Association of Ophthalmologists, Inc. PURPOSE:: To report a case of corneal erosion with pigments derived from a cosmetic contact lens (CCL). METHODS:: A 29-year-old woman complained of foreign body sensation after wearing CCL....

© 2016 The Japan Society for Analytical Chemistry. In order to investigate the long-range transfer mechanism of inorganic small spherical particles in wet-depositions on mountains and remote areas along the Japan Sea in Honshu Island, Japan in 201...

© The Japan Society for Analytical Chemistry. The measurement conditions for determining boron using graphite furnace-atomic absorption spectrometry (GF-AAS) were investigated. Differences in the boron absorbance profiles were found using three di...

© 2015 Contact Lens Association of Ophthalmologists. Objective: To investigate the surfaces and principal elements of the colorants of cosmetically tinted contact lenses (Cos-CLs). Methods: We analyzed the surfaces and principal elements of the co...

© 2014 The Japan Society for Analytical Chemistry. In order to investigate the long-range transfer mechanism of inorganic small spherical particles in wet-depositions, such as rime, snow and glaze, on the summit of Mt. Kajigamori (1399.4 m alt.), ...

The second and third glaze events in Shikoku region were observed to have arisen during the early morning in March 9/2012 and January 14/2013, respectively. In order to obtain information about the concentrations of chemical constituents in glaze,...

The functionality of spring mountain herbs, which were collected in the Kajigamori mountain area of Shikoku area in Japan, was investigated in the course of our studies for utilizing local plant resources. The radical scavenging activity of the ex...

Yttrium is used in the production of various electronic devices because the alloy it contains enhances or modifies the properties of other elements. In order to study the cytotoxic action of yttrium, the effect of yttrium chloride (YCl 3 ) on the ...

Although cadmium-induced apoptosis of lymphocytes is one of common features in the immunotoxicity of cadmium, the membrane pathway for intracellular cadmium accumulation is not fully elucidated. To characterize membrane Cd 2+ transport of rat thym...

Winter rain, fresh snow, rime and glaze samples were collected on the top of Mt. Kajigamori (ALT. 1400 m), which is the watershed protection forest of Riv. Yoshinogawa with an altitude of 1400 m, Kochi, Shikoku Island in West Japan during the wint...

The elemental analysis of a 1M hydrochloric acid leaching solution from soil samples in the mountain district of Shikoku was carried out by a portable liquid electrode plasma (LEP) atomic emission spectrometer. The contents of Na, K, Ca, Mg, Mn, a...

A23187, a calcium ionophore, is used to induce Ca 2+ -dependent cell death by increasing intracellular Ca 2+ concentration ([Ca 2+ ] i ) under in vitro condition. Since this ionophore also increases membrane permeability of metal divalent cations ...

The atomization of various masses of gold deposited on a pyrolytic graphite furnace was observed between 0.02 and 0.20 ng. The process controlling function obtained indicated the formation of gold aggregates, such as droplets or clusters, and the ...

The atomization of 0.2 ng Ag deposited on ascorbic acid pyrolysed at various temperatures was observed and the activation parameters were estimated. The mass of Ag and the pyrolysis conditions were selected to form droplets without any dispersion ...

The analytical performance of pyrolytic and non-pyrolytic boron nitride (PBN and NBN) platforms, attached to a commercially available graphite tube furnace, in electrothermal atomic absorption spectrometry (ETAAS) for Cd was studied. Although the ...

Electrothermal (ET) atomization atomic absorption spectroscopy with a pyrolytic graphite (PG)-coated graphite furnace is employed as one of the effective techniques for determination of trace amount of metal in nano and picograms. In this article,...

A large-volume (100 μl) injection-ETAAS with W-treated PG furnace combined with a phosphate modifier was applied to the determination of unpolluted levels of Cd in tap, snow and river-water samples. The limit of detection of 1.1 ng 1 -1 was observ...

The W-treated pyrolytic graphite (PG) furnace made it possible to enhance the precision (RSD < 2%), detection limit (2.5 ng 1 -1 ) and sensitivity of Cd by a 100 μl injection with 5 μl of 2000 mg l -1 of Pd modifier for 300 firings. The morpho...

As a chemical modifier on kinetic parameters for atomic absorption signals for gold, the effect of the temperature and hold time of the ascorbic acid pyrolysis step has been investigated. The signal for gold, dispersed individually into micro-size...

Determination of As by direct electrothermal atomization atomic absorption spectrometry with a pyropytically-coated graphite furnace treated with W by a single drop treatment technique was reported. The treated PG furnace made it possible to intro...

The effect of various chemical modifiers (KMnO 4 , AgNO 3 +KMnO 4 , Pd, Rh, Ir and Pd+Rh) on ETAAS of Hg with laboratory-made boron nitride tube and platform furnaces was studied. The effectiveness of the chemical modifier was improved by the use ...

It was found that Arrhenius plots were composed of two straight portions for As deposited on the PG and NPG furnace walls and of one straight portion for that on active carbon formed from the pyrolysis of ascorbic acid at a low-temperature pyrolys...

The mechanistic behaviors of chemical reactions are reviewed together with those for the surface structure and chemical species in a graphite furnace for electrothermal atomization atomic absorption spectrometry. The nanostructure of a graphite su...

Yields of pyrolysis products and pore-size distribution of amorphous carbon produced from organic chemical modifiers, such as ascorbic acid, glucose and sucrose, for electrothermal atomization atomic absorption spectrometry were examined: the pyro...

The effect of treating the surface of a pyrolytically coated graphite furnace with various refractory elements, such as Hf, Nb, W and Zr, on the injectable sample volume was evaluated in order to enhance the sensitivity. Treatment with W made it p...

In the present work we investigated the atomization mechanisms of indium in electrothermal atomic absorption spectrometry with pyrolytically coated graphite (PC) and non-pyrolytically coated graphite (NPG) furnaces treated with a refractory elemen...

The effect of the ramp and bold times and the temperature of the pyrolysis step of ascorbic acid as a chemical modifier on AA signals for gold have been investigated. Three methods of pyrolysis for ascorbic acid were used: (1) pyrolysis of ascorbi...

Precipitation samples (snow) fallen before and after of a strong low pressure passings along south coast of Japan were collected at Joetsu city, Niigata, Japan. Dissolved ions such as Na + , K + , NH 4 + , Mg 2+ , Ca 2+ , Cl - , Br - , NO 3 - , an...

A significant enhancement of sensitivity with the formation of an unresolved double peak signal was observed for indium when deposited in a pyrolytic graphite (PG) furnace pyrolysed with an organic matrix solution and when deposited in a bare PG f...

In the ETAAS determination of In, double and single peak signals were observed when non-pyrolytic and pyrolytic graphite (PG) furnaces, respectively, were used. Since Arrhenius plots for the single peak signal in the PG furnace were composed of tw...

The electrothermal atomic absorption signal for gold deposited after pyrolysis of organic matrices was investigated. The signal shape was altered by pyrolysis of a volatile organic matrix (methanol, propan-1-ol and pentane-1,5-diol) and also a non...

The characteristics of pyrolysed ascorbic acid were investigated by electrothermal vaporization inductively coupled argon plasma mass spectrometry (ETV-ICP-MS) and Raman spectrometry. The signals from the ETV-ICP-MS instrumentation for m/z values ...

Precipitation samples were collected every rain-fall during eight months from June 1994 to January 1995 at Joetsu, Niigata, Japan. Dissolved ions such as Na + , K + , NH 4 + , Mg 2+ , Ca 2+ , CI - , Br-, NO 3 ” and SO4 2- and pH value were analyze...

Cytotoxic effects of silicic acid were investigated in two mouse cell line systems of a macrophage cell line (A640-BB-2 cells) and a fibroblast cell line (3T6 cells), in comparison with those of selenious acid. Phagocytic activity of the A640-BB-2...

The effects of easily ionized element (EIE) matrices on the response in furnace atomization plasma emission spectrometry is reported. Using NaCl and CsCl as model matrices, interference on integrated emission intensity from Pb and Co was studied a...

A furnace atomization plasma emission source was operated in a controlled pressure He environment (200-2000 Torr) (1 Torr=133.322 Pa). The response from several elements (Cd, Pb, Ag, Mn, Cu, Fe and Co) as well as emission from He I at 388.8 nm and...

Interactions of molecular and atomic analyte species released from the primary site of deposition of the sample into a heated integrated contact furnace have been studied with furnace atomization plasma emission spectrometry. With a 30 W forward p...

Aluminum was measured in 68 breast milk samples from 36 healthy mothers, who live in the San-in District in Japan, and in 24 cans from five brands of infant formulae on sale, by the graphite furnace atomic absorption spectrometry. The mean ± SD (r...

1994,1995

The graphite furnace atomic signal of gallium in pure Ar with a pyrolytic graphite (PG) coated tube contained an unresolved double-peak signal. Thermal decomposition of Ga2O(g) produced by carbon-catalyzed decomposition of Ga2O3(s) and an on-surfa...

The effects of prenatal triethylene tetramine dihydrochloride (Trien-2HC1) exposure on fetal mice have been investigated on gestational day 19. Trien-2HC1 was given throughout pregnancy at levels of 0 (control), 3,000, 6,000, or 12,000ppm as drink...

Double-peak atomic absorption signals for lead were observed in the presence of 1 % (m/v) (mass/volume) ascorbic acid when the nonpyrolytlc coated graphite (NPG) tube was used. The signal with double peaks could be separated into two signals: The ...

The effect of the addition of Cr(NO3)3 on graphite-furnace atomic absorption spectrometry for lead in the presence of MgCl2 was investigated from the viewpoint of its mechanism. X-Ray photoelectron spectrometry for the charring product of a mixtur...

A method for the determination of lead in serum by graphite furnace atomic absorption spectrometry with the standard type graphite tube using chromium nitrate as a matrix modifier is described. Serum is used without complicated sample pretreatment...

A simple and rapid method was investigated for the determination of μg/1 levels of lead and cadmium in biological samples, by multichannel graphite furnace atomic absorption spectrometry using ammonium dihydrogen phosphate as a matrix modifier. Bo...