Helen A. Stafford | Academic Influence

Helen A. Stafford's AcademicInfluence.com Rankings

Helen A. Stafford

Biology

#13797

World Rank

#17376

Historical Rank

#2726

USA Rank

Physiology

#459

World Rank

#690

Historical Rank

#54

USA Rank

Biochemistry

#2433

World Rank

#2587

Historical Rank

#319

USA Rank

biology Degrees

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Biology

Helen A. Stafford's Degrees

PhD Plant Biology University of California, Berkeley
Masters Plant Physiology University of California, Berkeley
Bachelors Biology University of California, Berkeley

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Why Is Helen A. Stafford Influential?

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According to Wikipedia, Helen Adele Stafford was an American plant physiologist and phytochemist. She was from 1977 to 1978 the president of the Phytochemical Society of North America. Biography Helen A. Stafford attended Quaker schools in Philadelphia. She became interested in botany when tending her father's garden.

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Helen A. Stafford's Published Works

Number of citations in a given year to any of this author's works

Total number of citations to an author for the works they published in a given year. This highlights publication of the most important work(s) by the author

Published Works

Flavonoid evolution: an enzymic approach. (1991) (296)
Anthocyanins and betalains: evolution of the mutually exclusive pathways (1994) (223)
The metabolism of aromatic compounds (1974) (137)
Phenolic metabolism in plants (1992) (119)
Possible Multienzyme Complexes Regulating the Formation of C6-C3 Phenolic Compounds and Lignins in Higher Plants (1974) (112)
Proanthocyanidins and the lignin connection (1988) (98)
Flavan-3-ol Biosynthesis : The Conversion of (+)-Dihydroquercetin and Flavan-3,4-cis-Diol (Leucocyanidin) to (+)-Catechin by Reductases Extracted from Cell Suspension Cultures of Douglas Fir. (1984) (84)
Enzymic and nonenzymic reduction of (+)-dihydroquercetin to its 3,4,-diol. (1982) (82)
Intracellular Localization of Enzymes in Pea Seedlings (1951) (81)
The enzymatic reduction of hydroxypyruvic acid to D-glyceric acid in higher plants. (1954) (80)
Differences Between Lignin-like Polymers Formed by Peroxidation of Eugenol and Ferulic Acid in Leaf Sections of Phleum. (1960) (76)
Flavonoids and related phenolic compounds produced in the first internode of Sorghum vulgare Pers. in darkness and in light. (1965) (75)
Changes in phenolic compounds and related enzymes in young plants of sorghum (1969) (67)
Roles of flavonoids in symbiotic and defense functions in legume roots (2008) (60)
Ontogeny and hormonal control of polyphenoloxidase isozymes in tobacco pith. (1970) (57)
Biochemistry of the Mevalonic Acid Pathway to Terpenoids (1990) (57)
Phytochemical Potential of Tropical Plants (1993) (57)
Localization of Enzymes in the Cells of Higher Plants (1954) (54)
THE DISTRIBUTION IN HIGHER PLANTS OF TRIPHOSPHOPYRIDINE NUCLEOTIDE-LINKED ENZYME SYSTEMS CAPABLE OF REDUCING GLUTATHIONE. (1952) (53)
Flavan-3-ol Biosynthesis : The Conversion of (+)-Dihydromyricetin to Its Flavan-3,4-Diol (Leucodelphinidin) and to (+)-Gallocatechin by Reductases Extracted from Tissue Cultures of Ginkgo biloba and Pseudotsuga menziesii. (1985) (52)
DISTRIBUTION OF TARTARIC ACID IN THE LEAVES OF CERTAIN ANGIOSPERMS (1959) (49)
The procyanidins of Douglas fir seedlings, callus and cell suspension cultures derived from cotyledons (1980) (49)
Histochemical & Biochemical Differences Between Lignin-Like Materials in Phleum pratense L. (1962) (49)
Enzymic regulation of procyanidin biosynthesis; lack of a flav-3-en-3-ol intermediate (1983) (46)
Procyanidins (Condensed Tannins) in Green Cell Suspension Cultures of Douglas Fir Compared with Those in Strawberry and Avocado Leaves by Means of C(18)-Reversed-phase Chromatography. (1980) (45)
4-Hydroxycinnamic Acid Hydroxylase and Polyphenolase Activities in Sorghum vulgare. (1972) (43)
Peroxidase isozymes of first internodes of sorghum: tissue and intracellular localization and multiple peaks of activity isolated by gel filtration chromatography. (1972) (43)
Modern Phytochemical Methods (1991) (36)
Chemical and enzymatic synthesis of monomeric procyanidins (leucocyanidins or 3',4',5,7-tetrahydroxyflavan-3,4-diols) from (2R,3R)-dihydroquercetin (1985) (35)
Phosphogluconic Dehydrogenase in Higher Plants. (1953) (34)
Regulatory Mechanisms in Anthocyanin Biosynthesis in First Internodes of Sorghum vulgare: Effect of Presumed Inhibitors of Protein Synthesis. (1966) (33)
5 – Compartmentation in Natural Product Biosynthesis by Multienzyme Complexes (1981) (31)
Proanthocyanidins and potential precursors in needles of douglas fir and in cell suspension cultures derived from seedling shoot tissues. (1981) (31)
Comparison of Proanthocyanidins and Related Compounds in Leaves and Leaf-Derived Cell Cultures of Ginkgo bioloba L., Pseudotsuga menziesii Franco, and Ribes sanguineum Pursh. (1986) (30)
The Enzymology of Proanthocyanidin Biosynthesis (1989) (30)
Alcohol dehydrogenase of wheat germ. (1953) (27)
Comparison of Lignin-like Products Found Naturally or Induced in Tissues of Phleum, Elodea, and Coleus, and in a Paper Perioxidase System. (1964) (27)
The Fixation of CO(2) into Tartaric and Malic Acids of Excised Grape Leaves. (1958) (26)
Observations on the Incorporation of C14 into Tartaric Acid and the Labeling Pattern of D-Glucose from an Excised Grape Leaf Administered L-Ascorbic Acid-6-C14. (1958) (25)
Crown gall disease andAgrobacterium tumefaciens: A study of the history, present knowledge, missing information, and impact on molecular genetics (2008) (25)
DISTRIBUTION OF TARTARIC ACID IN THE GERANIACEAE (1961) (24)
Factors Controlling the Synthesis of Natural and Induced Lignins in Phleum and Elodea. (1965) (24)
Incorporation of [C]Phenylalanine into Flavan-3-ols and Procyanidins in Cell Suspension Cultures of Douglas Fir. (1982) (24)
Oxidative dimerization of ferulic acid by extracts from Sorghum (1976) (21)
Teosinte to maize—some aspects of missing biochemical and physiological data concerning regulation of flavonoid pathways (1998) (19)
Tartaric Acid Dehydrogenase Activity in Higher Plants. (1957) (19)
PROANTHOCYANIDINS IN NEEDLES FROM SIX GENERA OF THE TAXODIACEAE (1986) (19)
Biosynthesis of phenolic compounds in first internodes of sorghum: lignin and related products. (1967) (18)
Comparison of Lignin-Like Polymers Produced Peroxidatively by Cinnamic Acid Derivatives in Leaf Sections of Phleum. (1960) (17)
Histochemical assay of proanthocyanidin heterogeneity in cell cultures (1987) (17)
The enzymatic transfer of hydrogen by glyceric and lactic dehydrogenases. (1960) (16)
Relationships between the development of adventitious roots and the biosynthesis of anthocyanins in first internodes of sorghum. (1968) (16)
Chapter Two - The Evolution of Phenolics in Plants (2000) (16)
The effect of greening of sorghum leaves on the molecular weight of a complex containing 4-hydroxycinnamic Acid hydroxylase activity. (1973) (15)
Interference by a phenylacetate pathway in isotopic assays for phenylalanine ammonia-lyase in leaf extracts. (1977) (15)
The development of proanthocyanidins (condensed tannins) and other phenolics in bark of Pseudotsuga menziesii (1989) (14)
STUDIES ON THE GROWTH AND XYLARY DEVELOPMENT OF PHLEUM PRATENSE SEEDLINGS IN DARKNESS AND IN LIGHT (1948) (14)
Activation of 4-hydroxycinnamate hydroxylase in extracts from sorghum. (1974) (13)
A Developmental Study of D-Glyceric Acid Dehydrogenase. (1954) (13)
Dehydrogenase Activity of Hydroxymalonate and Related Acids in Higher Plants. (1956) (12)
The Distribution and Development of Enzymes in Pea Seedlings (1952) (11)
A monophenol oxidase activity in extracts of sorghum. (1970) (11)
Secondary metabolites: Their function and evolution (1993) (11)
Enzymatic oxidation of DPNH by diketosuccinate and dihydroxyfumarate. (1954) (8)
Characteristics of a 4-hydroxycinnamate hydroxylase purified from sorghum leaves. (1976) (8)
Conversion of l- and d-Phenylalanine to Phenylacetate via Phenylpyruvate in Sorghum Leaf Extracts. (1979) (7)
Observations on the Incorporation of C into Tartaric Acid and the Labeling Pattern of D-Glucose from an Excised Grape Leaf Administered L-Ascorbic Acid-6-C. (1958) (7)
What Is a Plant Cell? (1991) (6)
Phytochemical Potential of Tropical Plants. (1994) (5)
Transformations of a large aggregate of hydroxycinnamate hydroxylase to lower molecular weight forms by sulfhydryl agents in green leaves of sorghum. (1975) (5)
Variability in accumulation of proanthocyanidins (condensed tannins) in needles of Douglas-fir (Pseudotsuga menziesii) following long-term budworm defoliation (1984) (4)
The accumulation of anthocyanins in green and red seedling strains of Sorghum vulgare. (1970) (4)
Plant Science Review: Plant Polyphenols 2, Chemistry, Biology, Pharmacology, Ecology (2001) (3)
Photochemical dimerization of ferulic Acid by chloroplasts from sorghum. (1977) (3)
A Guide to the Nomenclature and Classification of Organisms (1960) (2)
Recent Discoveries about Phenolics (1998) (2)
Plant Cell Wall Polymers. Biogenesis and Biodegradation. Norman G. Lewis and Michael G. Paice, Eds. American Chemical Society, Washington, DC, 1989. xii, 676 pp., illus. $119.95. ACS Symposium Series, vol. 399. From a symposium, Toronto, ON, June 1988. (1990) (2)
Progress in Phytochemistry. Vol. 1. L. Reinhold and Y. Liwschitz, Eds. Interscience (Wiley), New York, 1968. x + 723 pp., illus. $23.75 (1969) (1)
Tenth anniversary meeting of the phytochemical society of North America (1971) (1)
Comparison ofProanthocyanidin s andRelated Compounds in Leaves andLeaf-Derived Cell Cultures ofGinkgo bioloba L., Pseudotsuga menziesii Franco, andRibes sanguineum Pursh' (1986) (0)
4-Hydroxvcinnamic AcidHydroxylase andPolyphenolase Activities inSorghumvulgarel (1972) (0)
Plant pigments. (1976) (0)
Activation of 4-Hydroxvcinnamate Hvdroxvlase in Extracts from Sorghum '2 (0)
THE FIXATION OF C 1402 INTO TARTARIC AND MALIC ACIDS OF EXCISED GRAPE LEAVES 1 ' 2 (2004) (0)
TARTARIC ACID DEHYDROGENASE ACTIVITY IN HIGHER PLANTS 1 , 2 (2004) (0)
COM2\PARISON OF LIGNIN-LIKE POLJYMERS PRODUCED PEROXIDATIVELY BY CINNAMIIC ACID DERIVATIVES IN LEAF SECTIONS OF PHLEUMN1 (0)
FORMIED BY PEROXIDATION OF EUGENOL AND FERULIC ACID IN LEAF SECTIONS OF PHLEUM' (0)
THE CONVERSION OF (+)-DIHYDROQUERCETIN AND FLAVAN-3,4-CIS-DIOL (LEUCOCYANIDIN) TO (+)-CATECHIN BY REDUCTASES EXTRACTED FROM CELL SUSPENSION CULTURES OF (1984) (0)
Biosynthesis ofPhenolic Compounds inFirst Internodes of Sorghum:Lignin andRelated Products' (1967) (0)
Plant Pigments: The Flavonoids . J. B. Harborne, T. J. Mabry, and Helga Mabry, Eds. Academic Press, New York, 1975. Two volumes. Part 1. xvi pp. + pp. 1-632, illus. Part 2. xvi pp. + pp. 633-1204, illus. $33.50 each. (1976) (0)

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