Natural Variations in 15N in the Marine Environment

Influence of diet on the distribution of nitrogen isotopes in animals

1981 • 5,995 citations

Influence of diet on the distribution of carbon isotopes in animals

1978 • 4,525 citations

Isotopic standards for carbon and oxygen and correction factors for mass-spectrometric analysis of carbon dioxide

1957 • 4,146 citations

Stepwise enrichment of 15N along food chains: Further evidence and the relation between δ15N and animal age

1984 • 3,918 citations

The thermodynamic properties of isotopic substances

1947 • 2,348 citations

Nitrogen and carbon isotopic composition of bone collagen from marine and terrestrial animals

1984 • 1,919 citations

Submarine Thermal Springs on the Galápagos Rift

1979 • 1,809 citations

δ13C Measurements as Indicators of Carbon Flow in Marine and Freshwater Ecosystems

1989 • 1,737 citations

Fractionation and turnover of stable carbon isotopes in animal tissues: Implications for ?13C analysis of diet

1983 • 1,730 citations

Experimental determination of nitrogen kinetic isotope fractionation: Some principles; illustration for the denitrification and nitrification processes

1981 • 1,707 citations

Nitrogen in the Marine Environment

1985 • 1,088 citations

Standards for stable isotope measurements in natural compounds

1978 • 1,042 citations

A Redetermination of the Relative Abundances of the Isotopes of Carbon, Nitrogen, Oxygen, Argon, and Potassium

1950 • 966 citations

Atmospheric nitrogen is a reliable standard for natural 15N abundance measurements

1983 • 878 citations

Food-Web structure and the fractionation of Carbon isotopes in the bering sea

1979 • 728 citations

Multiple Stable Isotopes Used to Trace the Flow of Organic Matter in Estuarine Food Webs

1985 • 631 citations

Nitrogen isotope fractionation in soils and microbial reactions

1970 • 529 citations

Correlation of carbon and nitrogen stable isotope ratios in sedimentary organic matter 1

1978 • 517 citations

Isotopic fractionation of dissolved nitrate during denitrification in the eastern tropical north pacific ocean

1975 • 465 citations

The determination of nitrogen-15 by emission and mass spectrometry in biochemical analysis: a review

1975 • 430 citations

Kinetic fractionation of stable nitrogen isotopes during amino acid transamination

1986 • 416 citations

Carbon, hydrogen and nitrogen in carbonaceous chondrites: Abundances and isotopic compositions in bulk samples

1985 • 412 citations

Isotope marine chemistry

1981 • 403 citations

Rapid 13C/12C turnover during growth of brown shrimp (Penaeus aztecus)

1982 • 394 citations

Mass Spectrometry and its Applications to Organic Chemistry.

1961 • 386 citations

A new Method of Positive Ray Analysis

1918 • 355 citations

Nitrogen isotope ratios of red tide organisms in the East China Sea: A characterization of biological nitrogen fixation

1986 • 329 citations

The absolute abundance of the nitrogen isotopes in the atmosphere and compressed gas from various sources

1958 • 318 citations

Nitrogen isotope effects in the assimilation of inorganic nitrogenous compounds by marine diatoms

1978 • 316 citations

Natural 15N abundance of presumed N2-fixing and non-N2-fixing plants from selected ecosystems

1982 • 301 citations

Deep-Sea Primary Production at the Galápagos Hydrothermal Vents

1980 • 288 citations

Fractionation of nitrogen isotopes by animals: a further complication to the use of variations in the natural abundance of ¹⁵N for tracer studies

1978 • 285 citations

Fertilizer Nitrogen: Contribution to Nitrate in Surface Water in a Corn Belt Watershed

1971 • 284 citations

Natural abundance of 15N in particulate organic matter in the North Pacific Ocean

1976 • 257 citations

Comparison of Kjeldahl and combustion methods for measurement of nitrogen isotope ratios in organic matter

1984 • 247 citations

Alteration of and ratios of plant matter during the initial stages of diagenesis: Studies utilizing archaeological specimens from Peru

1985 • 244 citations

Interfacing an automatic elemental analyser with an isotope ratio mass sepectrometer: the potential for fully automated total nitrogen and nitrogen-15 analysis

1983 • 237 citations

Natural isotopic composition of nitrogen as a tracer of origin for suspended organic matter in the Scheldt estuary

1984 • 236 citations

Method for Measuring Rates of NH ₄ ⁺ Turnover in Anoxic Marine Sediments, Using a ¹⁵ N-NH ₄ ⁺ Dilution Technique

1979 • 234 citations

The Isotope Effect in the Fixation of Nitrogen by Azotobacter

1960 • 233 citations

Marine and Estuarine Geochemistry

1986 • 219 citations

The isotopic composition of the ammonia and the nitrate ion in rain

1957 • 213 citations

XXVI. Rays of positive electricity

1911 • 203 citations

Stable carbon isotope ratios in the biota, soils and tidal water of a Georgia salt marsh

1976 • 203 citations

15N aboundance in nitrogen of naturally occurring substances and global assessment of denitrification from isotopic viewpoint.

1975 • 201 citations

The Origins of Detritus in Georgia Salt Marsh Estuaries

1977 • 193 citations

Role of seagrasses and mangroves in estuarine food webs: temporal and spatial changes in stable isotope composition and amino acid content during decomposition

1984 • 187 citations

Preparation and measurement of isotopic tracers.

1946 • 185 citations

Grasshopper Food Web Analysis: Use of Carbon Isotope Ratios to Examine Feeding Relationships Among Terrestrial Herbivores

1978 • 181 citations

Seasonal variation in the relative utilization of carbon and nitrogen by the mussel Mytilus edulis: budgets, conversion efficiencies and maintenance requirements

1985 • 181 citations

Elemental and isotopic fractionation of carbon and nitrogen by marine, planktonic copepods and implications to the marine nitrogen cycle

1985 • 178 citations

Natural abundances of 15N as a source indicator for near-shore marine sedimentary and dissolved nitrogen

1980 • 174 citations

Carbon-13 Depletion in a Hydrothermal Vent Mussel: Suggestion of a Chemosynthetic Food Source

1979 • 174 citations

Nitrogen and carbon isotope fractionation by two species of marine amphipods: Laboratory and field studies

1982 • 163 citations

δ¹³C evidence of the origins and fates of organic carbon in estuarine and near-shore food webs

1985 • 162 citations

Isotopic composition of atmospheric oxygen and nitrogen

1954 • 160 citations

NITROGEN-15 IN THE NATURAL ENVIRONMENT

1980 • 160 citations

ISOTOPE EFFECTS IN METABOLISM OF¹⁴N AND¹⁵N FROM UNLABELED DIETARY PROTEINS

1966 • 160 citations

Isotopic Fractionation Associated With Symbiotic N₂ Fixation and Uptake of NO₃⁻ by Plants

1980 • 158 citations

Rays of Positive Electricity

1909 • 154 citations

Bacterial symbionts and low 13C/12C ratios in tissues of Pogonophora indicate unusual nutrition and metabolism

1981 • 136 citations

Oceanic Nitrogen Isotopes and Their Uses in Determining the Source of Sedimentary Nitrogen

1982 • 136 citations

Temporal and spatial variations in the natural abundance of 15N in PON from a warm-core ring

1985 • 135 citations

NITROGEN ISOTOPE FRACTIONATION ASSOCIATED WITH THE NO₂⁻ → N₂O STEP OF DENITRIFICATION IN SOILS

1982 • 133 citations

Animal diet in Texas seagrass meadows: δ13C evidence for the importance of benthic plants

1979 • 127 citations

Relationships between the synthesis and breakdown of protein, dietary absorption and turnovers of nitrogen and carbon in the blue mussel, Mytilus edulis L.

1985 • 125 citations

Hydrocarbons in age-dated sediment cores from two basins in the Southern California Bight

1980 • 123 citations

Nitrogen-15: Microbiological Alteration of Abundance

1968 • 122 citations

A rapid procedure for preparing gas samples for nitrogen-15 determination

1970 • 122 citations

NATURAL NITROGEN-15 ABUNDANCE OF SOIL AND PLANT SAMPLES

1976 • 119 citations

Relation between the stable carbon isotope composition of fiddler crabs, plants, and soils in a salt marsh1

1976 • 118 citations

Variations of Nitrogen-15 Abundance in Naturally Occurring Substances

1955 • 117 citations

Characterisation of domestic and industrial sewage in Southern California coastal sediments using nitrogen, carbon, sulphur and uranium tracers

1980 • 117 citations

Stable carbon isotope variability in marine macrophytes and its implications for food web studies

1984 • 117 citations

Low 15N/14N in hydrothermal vent animals: ecological implications

1981 • 112 citations

Nitrogen Isotope Distribution as a Presumptive Indicator of Nitrogen Fixation

1979 • 112 citations

Differences in animal 13C, 15N and D abundance between a polluted and an unpolluted coastal site: Likely indicators of sewage uptake by a marine food web

1981 • 112 citations

15N abundance in Antarctica: origin of soil nitrogen and ecological implications

1981 • 109 citations

Variations of Nitrogen-15 Abundance in Soils

1964 • 108 citations

STUDIES IN PROTEIN METABOLISM

1939 • 99 citations

Apparatus for preparing nitrogen from ammonium chloride for nitrogen-15 determinations

1977 • 99 citations

High nitrogen isotope ratio for soils of seabird rookeries

1986 • 95 citations

[16] Methods for measurement of nitrogen fixation

1957 • 93 citations

15N/14N ratio of dissolved N2O in the eastern tropical Pacific Ocean

1984 • 92 citations

The Validity of the Use of Tracers to Follow Chemical Reactions

1949 • 87 citations

Nitrogen‐Isotope Ratios of Nitrate in Ground Water Under Fertilized Fields, Long Island, New York

1985 • 82 citations

Use of Variations in Natural Nitrogen Isotope Abundance for Environmental Studies: A Questionable Approach

1972 • 81 citations

Variations in the natural abundance of 15N in estuarine suspended particulate matter: A specific indicator of biological processing

1985 • 79 citations

13C/12C ratios in marine invertebrates from reducing sediments: confirmation of nutricional importance of chemoautotrophic endosymbiotic bacteria

1986 • 76 citations

Isotope assessment of Holocene human diets in the southwestern Cape, South Africa

1985 • 75 citations

Utilization of shallow-water seagrass detritus by Carribbean deep-sea macrofauna: δ13C evidence

1985 • 74 citations

Rapid conversion of organic nitrogen to N2 for mass spectrometry: an automated dumas procedure

1965 • 73 citations

STUDIES IN PROTEIN METABOLISM

1939 • 71 citations

13C/12C ratios in marine food webs of the Torres Strait, Queensland

1983 • 70 citations

Nitrogen/argon and nitrogen isotope ratios in two anaerobic environments, the Cariaco Trench in the Caribbean Sea and Dramsfjord, Norway

1961 • 70 citations

Automation of an interface between a nitrogen analyser and an isotope ratio mass spectrometer

1985 • 65 citations

Natural enrichment of 15N during decomposition of plant material in soil

1983 • 63 citations

Recovery of ammonium nitrogen by solvent extraction for the determination of relative 15N abundance in regeneration experiments

1986 • 59 citations

Nitrogen/argon and nitrogen isotope ratios in aerobic sea water

1961 • 54 citations

Vertical patterns in <SUP>15</SUP>N natural abundance in PON from the surface waters of warm-core rings

1986 • 54 citations

Tracing flocculent industrial and domestic sewage transport on San Pedro Shelf, Southern California, by nitrogen and sulphur isotope ratios

1980 • 52 citations

Isotopic variations of the nitrogen in Lake Superior

1977 • 51 citations

A resin-based method for the preparation of molecular nitrogen for 15N analysis from urinary and plasma components

1982 • 48 citations

Carbon-13 depletion in an estuarine bivalve: Detection of marine and terrestrial food sources

1982 • 48 citations

NONRADIOGENIC ISOTOPES IN GEOLOGY: A REVIEW

1953 • 48 citations

NITROGEN ISOTOPE FRACTIONATION DURING AMMONIUM EXCHANGE REACTIONS WITH SOIL CLAY

1978 • 44 citations

Stable isotope and amino acid composition of estuarine dissolved colloidal material

1985 • 42 citations

Natural variations in the relative abundances of the nitrogen isotopes

1957 • 35 citations

Simultaneous measurements and determinations of stable carbon and nitrogen isotope ratios, and organic carbon and nitrogen contents in biological samples by coupling of a small quadrupole mass spectrometer and modified carbon-nitrogen elemental analyzer

1983 • 34 citations

Nitrogen isotope ratio analysis of small samples: sample preparation and calibration

1985 • 28 citations

Quantitative determination of total organic nitrogen and isotope enrichment in marine phytoplankton

1974 • 28 citations

A new method for the recovery of ammonium from natural waters for measurement of 15N composition in isotope dilution experiments

1985 • 27 citations

[21] The measurement of stable isotopes

1957 • 25 citations

A model for the vertical flux of nitrogen in the upper ocean: Simulating the alteration of isotopic ratios

1986 • 22 citations

An instrumental method for nitrogen-15 and total nitrogen by combined system of mass spectrometer and automatic nitrogen analyzer

1975 • 12 citations

Does Diffusive Separation Exist in the Atmosphere below 55 Kilometers?

1951 • 11 citations

Abundance of N ¹⁵ in the Nitrogen Occluded in Radioactive Minerals

1950 • 11 citations

Isotopic Separation due to Settling in the Atmosphere

1950 • 10 citations

Schnelle Simultanbestimmung von Stickstoff-15 und Gesamtstickstoff durch direkte Kopplung von Massenspektrometer und automatischer Elementaranalyse

1978 • 8 citations

Abundance of N15 in the Nitrogen Present in Crude Oil and Coal

1951 • 8 citations

1 The Use of Stable Isotopes in Medicinal Chemistry

1978 • 7 citations

A new method for precision isotope ratio differences using a conventional quadrupole mass spectrometer

1976 • 5 citations

Fractionation of nitrogen-15 during distillation of ammonia in an all-glass still

1980 • 4 citations