H. Oka

发表

Application of ion-exchange cartridge clean-up in food analysis. V. Simultaneous determination of sulphonamide antibacterials in animal liver and kidney using high-performance liquid chromatography with ultraviolet and mass spectrometric detection.

H. Nagase, H. Matsumoto, Y. Ito, 2000, Journal of chromatography. A.

Simultaneous Analysis of Seven Benzodiazepines in Dietary Supplements as Adulterants Using High Performance Liquid Chromatography and its Application to an Identification System for Diazepam

E. Mikami, T. Ohno, H. Oka, 2005 .

Simultaneous determination of avermectins in bovine tissues by LC-MS/MS.

T. Hino, Koichi Inoue, H. Oka, 2009, Journal of separation science.

Simple and rapid determination of thiabendazole, imazalil, and o-phenylphenol in citrus fruit using flow-injection electrospray ionization tandem mass spectrometry.

H. Nakazawa, Yuko Ito, H. Matsumoto, 2003, Journal of agricultural and food chemistry.

Simple method for the analysis of food dyes on reversed-phase thin-layer plates.

T. Ohno, H. Oka, Y. Ikai, 1987, Journal of chromatography.

Separation and identification of microcystins in cyanobacteria by frit-fast atom bombardment liquid chromatography/mass spectrometry.

M. Watanabe, M. Suzuki, K. Harada, 1992, Toxicon : official journal of the International Society on Toxinology.

Reliable and sensitive method for determination of microcystins in complicated matrices by frit-fast atom bombardment liquid chromatography/mass spectrometry.

H. Matsumoto, K. Harada, H. Oka, 1995, Natural toxins.

Analysis and purification of toxic peptides from cyanobacteria by reversed-phase high-performance liquid chromatography.

W. Carmichael, S. Oishi, M. Watanabe, 1988, Journal of chromatography.

Survey of residual tetracyclines in kidneys of diseased animals in Aichi Prefecture, Japan (1985-1997).

H. Matsumoto, Y. Ito, H. Oka, 2001, Journal of AOAC International.

Chromatographic analysis of tetracycline antibiotics in foods.

Yuko Ito, H. Matsumoto, Y. Ito, 2000, Journal of chromatography. A.

Application of D, L-FDLA derivatization to determination of absolute configuration of constituent amino acids in peptide by advanced Marfey's method

Makoto Suzuki, K. Harada, H. Oka, 1996 .

Improvement of chemical analysis of antibodies. XXII: Identification of residual tetracyclines in honey by frit FAB/LC/MS using a volatile mobile phase

J. Hayakawa, H. Nakazawa, M. Horie, 1994 .

Mass spectrometric analysis of tetracycline antibiotics in foods.

K. Harada, Y. Ito, H. Oka, 1998, Journal of chromatography. A.

A Nonempirical Method Using LC/MS for Determination of the Absolute Configuration of Constituent Amino Acids in a Peptide: Combination of Marfey's Method with Mass Spectrometry and Its Practical Application

K. Harada, H. Oka, K. Fujii, 1997 .

A Nonempirical Method Using LC/MS for Determination of the Absolute Configuration of Constituent Amino Acids in a Peptide: Elucidation of Limitations of Marfey's Method and of Its Separation Mechanism

K. Harada, H. Oka, K. Fujii, 1997 .

Total structures of colistin minor components.

J. Hayakawa, M. Suzuki, K. Harada, 1998, The Journal of antibiotics.

Identification of unlawful food dyes by thin-layer chromatography-fast atom bombardment mass spectrometry.

J. Hayakawa, T. Ohno, M. Suzuki, 1994, Journal of chromatography. A.

Determination of nucleotides in infant formula by ion-exchange liquid chromatography.

T. Hino, Koichi Inoue, H. Oka, 2008, Journal of agricultural and food chemistry.

Determination of avoparcin in animal tissues and milk using LC-ESI-MS/MS and tandem-SPE.

T. Hino, Koichi Inoue, H. Oka, 2008, Journal of separation science.

A strategy for high-speed countercurrent chromatography purification of specific antioxidants from natural products based on on-line HPLC method with radical scavenging assay.

T. Hino, Koichi Inoue, H. Oka, 2012, Food chemistry.

Identification of a Shiga-toxin type I variant containing an IS1203-like element, from Shiga-toxin producing Escherichia coli O157:H7.

Yuko Ito, K. Sakae, M. Matsumoto, 2004, FEMS microbiology letters.

Determination of microcystins in lake water using reusable immunoaffinity column.

Yuko Ito, Y. Ueno, K. Harada, 2002, Toxicon : official journal of the International Society on Toxinology.

An approach to on-line electrospray mass spectrometric detection of polypeptide antibiotics of enramycin for high-speed counter-current chromatographic separation.

T. Hino, Koichi Inoue, H. Oka, 2010, Journal of pharmaceutical and biomedical analysis.

Formation, characterization, and toxicity of the glutathione and cysteine conjugates of toxic heptapeptide microcystins.

K. Matsuura, M. Suzuki, K. Harada, 1992, Chemical research in toxicology.

Characterization of estrogenic compounds in medical polyvinyl chloride tubing by gas chromatography-mass spectrometry and estrogen receptor binding assay.

Koichi Inoue, H. Nakazawa, Y. Yoshimura, 2002, Clinica chimica acta; international journal of clinical chemistry.

On-line solid-phase extraction LC-MS/MS for the determination of Ac-SDKP peptide in human plasma from hemodialysis patients.

T. Hino, Koichi Inoue, H. Oka, 2012, Biomedical chromatography : BMC.

Quantification of N-acetyl-seryl-aspartyl-lysyl-proline in hemodialysis patients administered angiotensin-converting enzyme inhibitors by stable isotope dilution liquid chromatography-tandem mass spectrometry.

T. Hino, Koichi Inoue, H. Oka, 2011, Journal of pharmaceutical and biomedical analysis.

Application of ion-exchange cartridge clean-up in food analysis IV. Confirmatory assay of benzylpenicillin, phenoxymethylpenicillin, oxacillin, cloxacillin, nafcillin and dicloxacillin, in bovine tissues by liquid chromatography-electrospray ionization tandem mass spectrometry.

H. Nagase, H. Matsumoto, Y. Ito, 2001, Journal of chromatography. A.

Serum Concentration of Fentanyl During Conversion From Intravenous to Transdermal Administration to Patients With Chronic Cancer Pain

K. Muro, Koichi Inoue, D. Takahari, 2013, The Clinical journal of pain.

Pulmonary , gastrointestinal and urogenital pharmacology An antioxidant Trolox restores decreased oral absorption of cyclosporine A after liver ischemia – reperfusion through distinct mechanisms between CYP 3 A and P-glycoprotein in the small intestine

Koichi Inoue, M. Okuda, H. Oka, 2012 .

Improvement of chemical analysis of antibiotics. XV. Isocratic high-performance liquid chromatographic methods for the analysis and preparative separation of the components of bacitracin.

M. Suzuki, K. Harada, H. Oka, 1989, Journal of chromatography.

Improvement of chemical analysis of antibiotics. XIII. Systematic simultaneous analysis of residual tetracyclines in animal tissues using thin-layer and high-performance liquid chromatography.

M. Suzuki, K. Harada, H. Oka, 1987, Journal of chromatography.

Preparation of samples for gas chromatography/mass spectrometry analysis of phthalate and adipate esters in plasma and beverages by steam distillation and extraction.

H. Nakazawa, Y. Yoshimura, Kayoko Kato, 2002, Journal of AOAC International.

Identification of Shiga toxins in Shiga toxin-producing Escherichia coli using immunoprecipitation and high-performance liquid chromatography-electrospray ionization mass spectrometry.

Yuko Ito, A. Shimizu, T. Nakanishi, 2003, The Analyst.

Improvement of chemical analysis of antibiotics. XVII. Application of an amino cartridge to the determination of residual sulphonamide antibacterials in meat, fish and egg.

J. Hayakawa, H. Nakazawa, M. Suzuki, 1991, Journal of chromatography.

Detection of Residual Chloramphenicol, Florfenicol, and Thiamphenicol in Yellowtail Fish Muscles by Capillary Gas Chromatography−Mass Spectrometry

H. Oka, T. Nagata, 1996 .

High-throughput analysis of tetracycline and penicillin antibiotics in animal tissues using electrospray tandem mass spectrometry with selected reaction monitoring transition.

Yuko Ito, H. Matsumoto, H. Oka, 2005, Journal of chromatography. A.

Application of ion-exchange cartridge clean-up in food analysis. VI. Determination of six penicillins in bovine tissues by liquid chromatography-electrospray ionization tandem mass spectrometry.

Yuko Ito, H. Matsumoto, H. Oka, 2004, Journal of chromatography. A.

Separation of spiramycin components using high-speed counter-current chromatography.

M. Suzuki, K. Harada, Y. Ito, 2000, Journal of chromatography. A.

Separation of ivermectin components by high-speed counter-current chromatography

J. Hayakawa, H. Nakazawa, M. Suzuki, 1996 .

[LC/ESI-MS/MS method for the simultaneous determination of macrocyclic lactone parasiticides in livestock products and fish].

T. Hino, Koichi Inoue, H. Oka, 2010, Shokuhin eiseigaku zasshi. Journal of the Food Hygienic Society of Japan.

LC-MS/MS and centrifugal ultrafiltration method for the determination of novobiocin in chicken, fish tissues, milk and human serum.

T. Hino, Koichi Inoue, H. Oka, 2009, Journal of chromatography. B, Analytical technologies in the biomedical and life sciences.

Studies on the polyploidy in Nicotiana induced by the treatment with colchicine. II. Growth rate and chemical analysis of diploid and its autotetraploid in Nicotiana rustica and N. Tabacum.

H. Oka, Y. Noguti, T. Otuka, 1940 .

Direct interfacing of high-speed countercurrent chromatography to frit electron ionization, chemical ionization, and fast atom bombardment mass spectrometry.

J. Hayakawa, M. Suzuki, K. Harada, 1991, Analytical chemistry.

A method usingL/CMS for determination of absolute configuration of constituent amino acids in peptide --- advanced Marfey's method ---

Makoto Suzuki, K. Harada, H. Oka, 1995 .

Simultaneous determination of residual tetracyclines in foods by high-performance liquid chromatography with atmospheric pressure chemical ionization tandem mass spectrometry.

H. Nakazawa, T. Watanabe, Y. Ito, 1999, Journal of chromatography. B, Biomedical sciences and applications.

Simultaneous determination of the nine food additives using high-performance liquid chromatography.

H. Oka, Y. Ikai, N. Kawamura, 1988, Journal of chromatography.

Improvement of chemical analysis of antibiotics. XI. Simultaneous fluorodensitometric determination of polyether antibiotics.

M. Suzuki, K. Harada, H. Oka, 1987, Journal of chromatography.

Two Sensitive Sick-building Syndrome Patients Possibly Responding to p-Dichlorobenzene and 2-Ethyl-1-Hexanol: Case Report

M. Kamijima, H. Nakazawa, Yuko Ito, 2007 .

A REVERSED-PHASE THIN-LAYER CHROMATOGRAPHY/SCANNING DENSITOMETRIC METHOD FOR THE ANALYSIS OF RED CABBAGE COLOR IN FOOD

H. Nagase, Yuko Ito, H. Matsumoto, 2002 .

The rapid analysis for residual pesticides by tandem mass spectrometry with immunoaffinity extraction

H. Nakazawa, H. Oka, Nobuyuki Takahashi, 2004 .

A Reversed‐Phase Thin‐Layer Chromatography/Scanning Densitometric Method for the Qualitative Analysis of Carthamus Yellow in Foods

Yuko Ito, H. Matsumoto, H. Oka, 2005 .

Simultaneous Analysis of Carotenoid Colorings in Foods by Thin Layer Chromatography

Takahiko Miyazawa, H. Nagase, Yuko Ito, 2003 .

A REVERSED-PHASE TLC/SCANNING DENSITOMETRIC METHOD FOR THE ANALYSIS OF TOMATO, ORANGE, AND MARIGOLD COLORS IN FOOD

Takahiko Miyazawa, H. Nagase, Yuko Ito, 2002 .

A REVERSED-PHASE THIN-LAYER CHROMATOGRAPHY/SCANNING DENSITOMETRIC METHOD FOR THE ANALYSIS OF GARDENIA YELLOW IN FOOD USING CROCETIN AS AN INDICATOR

Takahiko Miyazawa, Yuko Ito, T. Maruyama, 2001 .

Analysis of β-Carotene and Paprika Color in Foods Using Reversed-phase Thin-layer Chromatography/Scanning Densitometry

Yuko Ito, H. Oka, E. Ueno, 1999 .

Analysis of lac and cochineal colors in foods using reversed phase thin layer chromatography/scanning densitometry

Yuko Ito, H. Oka, Y. Miyazaki, 1999 .

Applicability of Reversed-Phase TLC to the Analysis of Coal Tar Dyes in Food

J. Hayakawa, Takeo Sato, T. Ohno, 1993 .

Improvement of chemical analysis of antibiotics : VI. Detection reagents for tetracyclines in thin-layer chromatography

Makoto Suzuki, K. Harada, H. Oka, 1984 .

Improvement of chemical analysis of antibiotics. XII. Simultaneous analysis of seven tetracyclines in honey.

M. Suzuki, K. Harada, H. Oka, 1987, Journal of chromatography.

Improvement of the chemical analysis of antibiotics I. Simple method for the analysis of tetracyclines on silica gel high-performance thin-layer plates

K. Harada, H. Oka, K. Uno, 1983 .

Screening assay of angiotensin-converting enzyme inhibitory activity from complex natural colourants and foods using high-throughput LC-MS/MS.

T. Hino, Koichi Inoue, H. Oka, 2011, Food chemistry.

Purification of quinoline yellow components using high-speed counter-current chromatography by stepwise increasing the flow-rate of the mobile phase.

Yuko Ito, H. Matsumoto, K. Harada, 2003, Journal of chromatography. A.

Purification of Food Color Red No. 106 (acid red) using pH-zone-refining counter-current chromatography.

Yuko Ito, H. Matsumoto, K. Harada, 2002, Journal of chromatography. A.

Separation of antibiotics by counter-current chromatography.

K. Harada, Y. Ito, H. Oka, 1998, Journal of chromatography. A.

Optimization of a high speed countercurrent chromatograph for analytical separations

J. Hayakawa, Makoto Suzuki, K. Harada, 1991 .

Efficient purification of xanthomonasin A and B from Monascus yellow colorant by high-speed countercurrent chromatography

T. Hino, Koichi Inoue, H. Oka, 2010 .

Isolation of Colistin A and B Using High-Speed Countercurrent Chromatography

J. Hayakawa, H. Nakazawa, K. Harada, 1998 .

Purification of curcumin, demethoxycurcumin, and bisdemethoxycurcumin by high-speed countercurrent chromatography.

T. Hino, Koichi Inoue, A. Nagatsu, 2008, Journal of agricultural and food chemistry.

Separation of lac dye components by high-speed counter-current chromatography.

J. Hayakawa, H. Nakazawa, H. Odani, 1998, Journal of chromatography. A.

Discrepancy Between the Theoretical Plate Number (N) and Peak Resolution (Rs) for Optimizing the Flow Rate in Countercurrent Chromatography

J. Hayakawa, H. Nakazawa, Makoto Suzuki, 1992 .

Purification of Food Color Red No. 106 (acid red) using high-speed counter-current chromatography.

J. Hayakawa, H. Nakazawa, M. Suzuki, 1991, Journal of chromatography.

High Throughput Analysis of N‐Methyl Carbamate Pesticides in Cereals and Beans by Dual Countercurrent Chromatography and Liquid Chromatography Electrospray Ionization Tandem Mass Spectrometry

H. Nagase, Yuko Ito, H. Matsumoto, 2006 .

CCC 2004–Tokyo, the Third International Conference on Countercurrent Chromatography

I. Sutherland, A. Berthod, H. Oka, 2005 .

Rapid determination of carbamate pesticides in food using dual counter-current chromatography directly interfaced with mass spectrometry.

Yoichiro Ito, Yuko Ito, Hiroshi Matsumoto, 2008, Journal of chromatography. A.

Application of dual counter-current chromatography for rapid sample preparation of N-methylcarbamate pesticides in vegetable oil and citrus fruit.

H. Nakazawa, H. Nagase, Yuko Ito, 2006, Journal of chromatography. A.

Preparative purification of gentamicin components using high-speed counter-current chromatography coupled with electrospray mass spectrometry.

T. Hino, Koichi Inoue, M. Horie, 2011, Journal of separation science.

Evaluation of analytical countercurrent chromatographs : high-speed countercurrent chromatograph-4000 vs. Analytical toroidal coil centrifuge

Makoto Suzuki, K. Harada, H. Oka, 1990 .

AN HPLC METHOD FOR THE ANALYSIS OF PAPRIKA COLOR IN FOOD USING CAPSANTHIN AS AN INDICATOR

Kazuo Hayashi, H. Nakazawa, Yuko Ito, 2001 .

Improvement of chemical analysis of antibiotics. V. A simple method for the analysis of tetracyclines using reversed-phase high-performance liquid chromatography.

M. Suzuki, K. Harada, H. Oka, 1984, Journal of chromatography.

Application of ion-exchange cartridge clean-up in food analysis III. Determination of benzylpenicillin, phenoxymethyl-penicillin, oxacillin, cloxacillin, nafcillin and dicloxacillin in bovine liver and kidney by liquid chromatography with ultraviolet detection.

H. Matsumoto, Y. Ito, H. Oka, 2000, Journal of chromatography. A.

Survey of residual tetracycline antibiotics and sulfa drugs in kidneys of diseased animals in the Aichi Prefecture, Japan (1995-1999).

Yuko Ito, H. Matsumoto, H. Oka, 2003, Journal of AOAC International.

Chemical analysis for antibiotics used in agriculture

H. Oka, 1995 .

Improvement of chemical analysis of antibiotics. VIII. Application of prepacked C18 cartridge for the analysis of tetracycline residues in animal liver.

H. Matsumoto, M. Suzuki, K. Harada, 1985, Journal of chromatography.

Application of ion-exchange cartridge clean-up in food analysis. I. Simultaneous determination of thiabendazole and imazalil in citrus fruit and banana using high-performance liquid chromatography with ultraviolet detection.

J. Hayakawa, Y. Ito, H. Oka, 1998, Journal of chromatography. A.

Improvement of chemical analysis of antibiotics. XVI. Simple and rapid determination of residual pyridonecarboxylic acid antibacterials in fish using a prepacked amino cartridge.

H. Nakazawa, M. Suzuki, K. Harada, 1989, Journal of chromatography.

Improvement of chemical analysis of antibiotics. IX. A simple method for residual tetracyclines analysis in honey using a tandem cartridge clean-up system.

M. Suzuki, K. Harada, H. Oka, 1987, Journal of chromatography.

The high throughput analysis of N-methyl carbamate pesticides in wine and juice by electrospray ionization liquid chromatography tandem mass spectrometry with direct sample injection into a short column

H. Nakazawa, I. Saito, H. Nagase, 2005 .

Improvement of chemical analysis of antibiotics. X. Determination of eight tetracyclines using thin-layer and high-performance liquid chromatography.

M. Suzuki, K. Harada, H. Oka, 1987, Journal of Chromatography A.

Improvement of chemical analysis of antibiotics. 21. Simultaneous determination of three polyether antibiotics in feeds using high-performance liquid chromatography with fluorescence detection

Makoto Suzuki, K. Harada, H. Oka, 1994 .

Fast atom bombardment mass spectral study of tetracycline antibiotics

J. Hayakawa, K. Masuda, Makoto Suzuki, 1993 .

Improvement of chemical analysis of antibiotics : III. Simple method for the analysis of tetracyclines on reversed-phase thin-layer plates☆

Makoto Suzuki, K. Harada, H. Oka, 1984 .

The high throughput analysis of N-methyl carbamate pesticides in fruits and vegetables by liquid chromatography electrospray ionization tandem mass spectrometry using a short column

H. Nagase, Yuko Ito, H. Matsumoto, 2006 .

Analysis of crude drugs using reversed-phase TLC/scanning densitometry. (II) Identification of ginseng, red ginseng, gentian, Japanese gentian, pueraria root, gardenia fruit, schisandra fruit and ginger

E. Mikami, T. Ohno, H. Oka, 2006, Journal of Natural Medicines.

Molecular Structure of Gardenia Blue Pigments by Reaction of Genipin with Benzylamine and Amino Acids.

Yuzo Nishizaki, N. Sugimoto, H. Oka, 2021, Journal of agricultural and food chemistry.

Photodecomposition products of tetracycline in aqueous solution

Makoto Suzuki, K. Harada, H. Oka, 1989 .

Hydrophilic Interaction Liquid Chromatography Tandem Mass Spectrometry Method for the Determination of Bicozamycin in Milk

T. Hino, H. Oka, Erina Yamada, 2009 .

Analysis of methyl isothiocyanate in wine by gas chromatography with dual detection.

J. Hayakawa, I. Saito, H. Oka, 1994, Journal of AOAC International.

Simultaneous determination of five polyether ionophores using liquid chromatography with one-step fluorescent derivatization.

T. Hino, N. Kishikawa, N. Kuroda, 2012, Analytical sciences : the international journal of the Japan Society for Analytical Chemistry.

Improvement of chemical analysis of antibiotics: XX. Basic study on high-performance liquid chromatographic determination of four polyether antibiotics pre-derivatized with 1-bromoacetylpyrene☆

Makoto Suzuki, K. Harada, H. Oka, 1993 .

Evaluation of thin layer chromatography—Fast atom bombardment mass spectrometry: Application to the determination of midazolam intoxication by use of 3-glycidoxypropyl-treated thin layer chromatographic plates

H. Oka, Y. Ikai, M. Okamoto, 1993 .

Development of a condensation technique for thin‐layer chromatography/fast‐atom bombardment mass spectrometry of non‐visible compounds

J. Hayakawa, K. Masuda, Makoto Suzuki, 1992 .

Separation and identification of food dyes by thin‐layer chromatography/liquid secondary ion mass spectrometry

K. Masuda, Makoto Suzuki, K. Harada, 1991 .

Chlortetracycline, oxytetracycline, and tetracycline in edible animal tissues, liquid chromatographic method: collaborative study.

H. Oka, J. Macneil, G. O. Korsrud, 1996, Journal of AOAC International.

Improvement of chemical analysis of antibiotics. XXIII. Identification of residual tetracyclines in bovine tissues by electrospray high-performance liquid chromatography-tandem mass spectrometry.

J. Hayakawa, H. Odani, K. Harada, 1997, Journal of chromatography. B, Biomedical sciences and applications.

Development of Competition Enzyme-Linked Immunosorbent Assay for Determination of Formaldehyde in Serum

H. Nakazawa, H. Oka, Y. Miyazaki, 2007 .

Analysis of gardenia blue in foods by thin-layer chromatography

H. Oka, K. Tsutsumiuchi, T. Morimoto, 2018 .

Development and application of an HILIC-MS/MS method for the quantitation of nucleotides in infant formula.

T. Hino, H. Oka, Rutsuko Obara, 2010, Journal of agricultural and food chemistry.

Further application of advanced Marfey's method for determination of absolute configuration of primary amino compound

K. Harada, H. Oka, K. Fujii, 1998 .

Simultaneous determination of triclabendazole and its sulphoxide and sulphone metabolites in bovine milk by high-performance liquid chromatography.

H. Nakazawa, T. Miyazaki, H. Oka, 2000, Journal of chromatography. A.

[Determination of benzimidazole anthelmintics in livestock foods by HPLC].

H. Nakazawa, Yuko Ito, H. Oka, 2003, Shokuhin eiseigaku zasshi. Journal of the Food Hygienic Society of Japan.

PREPARATIVE ISOLATION OF AVERMECTIN ISOMERS BY HIGH-SPEED COUNTERCURRENT CHROMATOGRAPHY COUPLED WITH ELECTROSPRAY MASS SPECTROMETRY

T. Hino, H. Oka, Yasuko Hattori, 2011 .

[Analytical method for carbamate pesticides in processed foods by LC/MS/MS].

Shoichiro Noguchi, H. Oka, H. Terada, 2008, Shokuhin eiseigaku zasshi. Journal of the Food Hygienic Society of Japan.

An HPLC Method for the Analysis of Marigold Color in Food Using Lutein as an Indicator

Takahiko Miyazawa, H. Nagase, Yuko Ito, 2004 .

Determination of mirosamicin in animal tissues by high-performance liquid chromatography.

H. Nakazawa, M. Horie, K. Saito, 1994, Journal of chromatography. B, Biomedical applications.

Rapid and simultaneous analysis of dichlorvos, malathion, carbaryl, and 2,4-dichlorophenoxy acetic acid in citrus fruit by flow-injection ion spray ionization tandem mass spectrometry.

H. Nakazawa, Y. Yoshimura, Kayoko Kato, 2004, Talanta.

[Use of liquid chromatography/mass spectrometry in food analysis].

Y. Ito, H. Oka, Y. Ikai, 2001, Shokuhin eiseigaku zasshi. Journal of the Food Hygienic Society of Japan.

Separation of Gardenia Yellow Components by High-Speed Countercurrent Chromatography

J. Hayakawa, H. Nakazawa, K. Harada, 1995 .

Simple and novel screening assay of natural antioxidants for Cu(II) ion/adrenaline-mediated oxidation of N-terminal amyloid beta by liquid chromatography/mass spectrometry.

T. Hino, H. Oka, K. Inoue, 2010, Journal of agricultural and food chemistry.

Screening assay for metal-catalyzed oxidation inhibitors using liquid chromatography-mass spectrometry with an N-terminal beta-amyloid peptide.

T. Hino, H. Oka, A. Nakagawa, 2009, Analytical chemistry.

Application of ion-exchange cartridge clean-up in food analysis. II. Determination of benzylpenicillin, phenoxymethylpenicillin, oxacillin, cloxacillin, nafcillin and dicloxacillin in meat using liquid chromatography with ultraviolet detection.

Y. Ito, H. Oka, Y. Ikai, 1999, Journal of chromatography. A.

An automatic visual inspection method based on supervised machine learning for rapid on-site evaluation in EUS-FNA

Hirofumi Inoue, Nobumoto Yamane, Kazuki Ogo, 2014, 2014 Proceedings of the SICE Annual Conference (SICE).

Determination of Phthalates in Diet and Bedding for Experimental Animals Using Gas Chromatography-Mass Spectrometry

H. Nakazawa, H. Oka, F. Kondo, 2010, Bulletin of environmental contamination and toxicology.

DETERMINATION OF IMIDOCARB IN BOVINE TISSUES AND MILK SAMPLES BY LC-MS/MS

T. Hino, H. Oka, M. Nunome, 2011 .

Simple and rapid determination of N-methylcarbamate pesticides in citrus fruits by electrospray ionization tandem mass spectrometry

H. Nakazawa, I. Saito, Yuko Ito, 2003 .

Improvement of chemical analysis of antibiotics. XIV. Identification of the components of bacitracin using normal- and reversed-phase thin-layer chromatography.

K. Harada, H. Oka, Y. Ikai, 1988, Journal of chromatography.

Total structures and antimicrobial activity of bacitracin minor components.

J. Hayakawa, K. Harada, H. Oka, 1995, The Journal of antibiotics.

Structural characterization of bacitracin components by Frit-fast atom bombardment (FAB) liquid chromatography/mass spectrometry (LC/MS).

J. Hayakawa, K. Harada, H. Oka, 1992, The Journal of antibiotics.

Identification of food dyes by TLC/SIMS with a condensation technique

K. Masuda, Makoto Suzuki, K. Harada, 1989 .

Horizontal flow-through coil planet centrifuge equipped with a set of multilayer coils around the column holder. Counter-current chromatography of proteins with a polymer-phase system.

Y. Ito, H. Oka, Y. Ito, 1988, Journal of chromatography.

Determination of Residual Avoparcin in Chicken Muscle by High Performance Liquid Chromatography

H. Nakazawa, M. Horie, H. Oka, 1994 .