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1

Rapid and quantitative blood amino acid analysis by chemical ionization mass spectrometry

John M. L. Mee, John Korth, Berthold Halpern, Lewis B. James

Journal:

Biological Mass Spectrometry = Journal of Mass Spectrometry (Wiley)

Year:

1977

Language:

english

File:

PDF, 406 KB

english, 1977

2

Simultaneous determination of diphenylhydantoin, mephobarbital, carbamazepine, phenobarbital and primidone in serum using direct chemical ionization mass spectrometry

Roger J. W. Truscott, Daniel G. Burke, John Korth, Berthold Halpern, Roger Summons

Journal:

Biological Mass Spectrometry = Journal of Mass Spectrometry (Wiley)

Year:

1978

Language:

english

File:

PDF, 571 KB

english, 1978

3

The identification of 3-keto-2-methylvaleric acid and 3-hydroxy-2-methylvaleric acid in a patient with propionic acidemia

Roger J. W. Truscott, Christopher J. Pullin, Berthold Halpern, Judy Hammond, Eric Haan, David M. Danks

Journal:

Biological Mass Spectrometry = Journal of Mass Spectrometry (Wiley)

Year:

1979

Language:

english

File:

PDF, 702 KB

english, 1979

4

Abnormal deoxyribose metabolites in the urine of a child with a possible new inborn error of metabolism

Roger J. W. Truscott, Berthold Halpern, Judy Hammond, Sue Hunt, Richard G. H. Cotton, Eric A. Haan, David M. Danks

Journal:

Biological Mass Spectrometry = Journal of Mass Spectrometry (Wiley)

Year:

1979

Language:

english

File:

PDF, 676 KB

english, 1979

5

Two new sulphur-containing amino acids in man

Roger J. W. Truscott, Don Malegan, Eric McCairns, Berthold Halpern, Judy Hammond, Richard G. H. Cotton, Julian F. B. Mercer, Sue Hunt, John G. Rogers, David M. Danks

Journal:

Biological Mass Spectrometry = Journal of Mass Spectrometry (Wiley)

Year:

1981

Language:

english

File:

PDF, 665 KB

english, 1981

6

Deuterated peptides: Platinum catalyzed exchange labeling of leucine enkephalin and related peptides

Kym F. Faull, Jack D. Barchas, Stephen Murray, Berthold Halpern

Journal:

Biological Mass Spectrometry = Journal of Mass Spectrometry (Wiley)

Year:

1983

Language:

english

File:

PDF, 684 KB

english, 1983

7

The absolute configuration of the new amino acid 2-amino-4-methyl-hex-5-enoic acid from a new guinea Boletus

Emery Gellert, Berthold Halpern, Richard Rudzats

Journal:

Year:

1978

Language:

english

File:

PDF, 128 KB

english, 1978

8

Hawkinsinuria — identification of quinolacetic acid and pyroglutamic acid during an acidotic phase

Charles H. Hocart, Berthold Halpern, Larry A. Hick, Choon O. Wong, Judith W. Hammond, Bridget Wilcken

Journal:

Journal of Chromatography B: Biomedical Sciences and Applications

Year:

1983

Language:

english

File:

PDF, 439 KB

english, 1983

9

Rapid and simplified extraction procedure for gas chromatographic—mass spectrometric profiling of urinary organic acids

Patricia J. Anderson, William L. Fitch, Berthold Halpern

Journal:

Journal of Chromatography B: Biomedical Sciences and Applications

Year:

1978

Language:

english

File:

PDF, 299 KB

english, 1978

10

Improved procedure for the anion-exchange isolation of urinary organic acids

Peter Sims, Roger Truscott, Berthold Halpern

Journal:

Journal of Chromatography B: Biomedical Sciences and Applications

Year:

1981

Language:

english

File:

PDF, 507 KB

english, 1981

11

ISOLATION AND IDENTIFICATION OF γ-AMINOBUTYRYL-CYSTATHIONINE FROM HUMAN BRAIN AND CSF

Thomas L. Perry, Shirley Hansen, Gary M. Schier, Berthold Halpern

Journal:

Journal of Neurochemistry

Year:

1977

Language:

english

File:

PDF, 419 KB

english, 1977

12

Simple route to sterically pure diketopiperazines

Nitecki, Danute E., Halpern, Berthold, Westley, John W.

Journal:

Journal of Organic Chemistry

Year:

1968

Language:

english

File:

PDF, 421 KB

english, 1968

13

Biogeochemistry of molecular complexes of amino acids with chlorins and porphyrins

Gordon W Hodgson, Margot A Holmes, Berthold Halpern

Journal:

Geochimica et Cosmochimica Acta

Year:

1970

Language:

english

File:

PDF, 1.16 MB

english, 1970

14

Measurement of racemization in peptide synthesis by nuclear magnetic resonance spectroscopy

Halpern, Berthold., Chew, Lawrence F., Weinstein, Boris.

Journal:

Journal of the American Chemical Society

Year:

1967

Language:

english

File:

PDF, 272 KB

english, 1967

15

Transesterification with an anion-exchange resin

Pereira, Wilfred, Close, Virginia A., Patton, Walter, Halpern, Berthold

Journal:

Journal of Organic Chemistry

Year:

1969

Language:

english

File:

PDF, 346 KB

english, 1969

16

Quaternary ammonium salts for butylation and mass spectral identification of volatile organic acids

Burke, Daniel G., Halpern, Berthold.

Journal:

Analytical Chemistry

Year:

1983

Language:

english

File:

PDF, 598 KB

english, 1983

17

Effect of solute structure on separation of diastereoisomeric esters and amides by gas-liquid chromatography

Westley, John W., Halpern, Berthold, Karger, B. L.

Journal:

Analytical Chemistry

Year:

1968

Language:

english

File:

PDF, 366 KB

english, 1968

18

Computer-operated mass spectrometer system

Reynolds, W. E., Bacon, V. A., Bridges, J. C., Coburn, T. C., Halpern, Berthold., Lederberg, Joshua., Levinthal, E. C., Steed, Ernest., Tucker, R. B.

Journal:

Analytical Chemistry

Year:

1970

Language:

english

File:

PDF, 904 KB

english, 1970

19

Rapid and Quantitative Blood Analysis for Free Fatty Acids by Chemical Ionization Mass Spectrometry

Mee, John M. L., Korth, John, Halpern, Berthold

Journal:

Analytical Letters

Year:

1976

Language:

english

File:

PDF, 286 KB

english, 1976

20

Hawkinsinuria

Wilcken, Bridget, Hammond, Judith W., Howard, Neville, Bohane, Timothy, Hocart, Charles, Halpern, Berthold

Journal:

Boston Medical and Surgical Journal

Year:

1981

Language:

english

File:

PDF, 774 KB

english, 1981

21

Determination of steric purity and configuration of diketopiperazines by gas-liquid chromatography, thin-layer chromatography, and nuclear magnetic resonance spectrometry

Westley, J. W., Close, V. A., Nitecki, D. N., Halpern, Berthold

Journal:

Analytical Chemistry

Year:

1968

Language:

english

File:

PDF, 365 KB

english, 1968

22

Investigation of racemization during peptide bond formation by gas chromatography of diastereoisomeric tertiarybutyloxycarbonyl amino acid amides

Halpern, Berthold., Chew, Lawrence F., Westley, John W.

Journal:

Analytical Chemistry

Year:

1967

Language:

english

File:

PDF, 174 KB

english, 1967

23

ChemInform Abstract: A CONVENIENT PREPARATIVE METHOD FOR TRYPTOPHAN BENZYL ESTERS

WILLIAMS, KENNETH, HALPERN, BERTHOLD

Journal:

Chemischer Informationsdienst

Year:

1975

File:

PDF, 201 KB

1975

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