S Griffin
Biographic Data
| ID | 5599129 |
|---|---|
| NAME | S Griffin |
| GIVEN NAMES | S |
| FAMILY NAME | Griffin |
| SIGNATURE | GRIFFIN S |
| AFFILIATIONS | Medical Research Council (MRC) Epidemiology Unit, Cambridge, UK |
| VERIFIED | No |
| TOTAL WORKS | 8 |
| TOTAL CITATIONS | 78 |
| AUTHOR COUNT | 8 |
| EDITOR COUNT | 0 |
| FIRST PUBLICATION YEAR | 2001 |
| LATEST PUBLICATION YEAR | 2015 |
| H-INDEX | 3 |
STI/HIV Sexual Risk Behavior and Prevalent STI Among Incarcerated African American Men in Committed Partnerships
PP12 Interventions to Promote Healthy Eating
OP48 Determinants of Active Commuting
Background Numerous cross-sectional studies have examined the associations between individual, psychological and environmental characteristics and active commuting, but few longitudinal studies exist to support more robust causal inference. Using two complementary approaches to longitudinal analysis, we aimed to build on this evidence by exploring whether (a) individual, psychological, workplace and route environmental characteristics, (b) change…
Is a change in mode of travel to school associated with a change in overall physical activity levels in children? Longitudinal results from the SPEEDY study
Background Previous work suggests that children who use active modes of travel (walking or cycling) are more physically active overall than those who use motorised transport (car, bus or train). However, the majority of these studies used cross-sectional designs, and it is not known whether a shift in mode of travel to school is associated with a change in children's overall physical activity. Objective To investigate the relationship between cha…
Ultra small-mass AMS 14C sample preparation and analyses at KCCAMS/UCI Facility
AMS 14 C Sample Preparation at the KCCAMS/UCI Facility
We present an overview of accelerator mass spectrometry (AMS) radiocarbon sample preparation and measurements, describing the technical upgrades that now allow us to routinely obtain 0.2–0.3% precision for 1-mg carbon samples. A precision of ∼1% on samples with 100 μg of carbon can also be achieved. We have also developed graphitization techniques and AMS procedures for ultra-small samples (down to 0.002 mg of carbon). Detailed time series are pr…
Magnesium Perchlorate as an Alternative Water Trap in AMS Graphite Sample Preparation
We present a brief discussion of sample preparation procedures at the Keck Carbon Cycle Accelerator Mass Spectrometer (KCCAMS), University of California, Irvine, and a systematic investigation of the use of Mg(ClO 4 ) 2 as an absorptive water trap, replacing the standard dry ice/ethanol cold finger in graphite sample preparation. We compare high-precision AMS measurement results from oxalic acid I and USGS coal samples using Mg(ClO 4 ) 2 under di…
Changes of Subtropical North Pacific Radiocarbon and Correlation with Climate Variability
We show that high-precision radiocarbon (Δ 14 C) measurements from annual bands of a Hawaiian surface coral decreased by 7‰ from AD 1893 to 1952. This decrease is coincident with the Suess Effect, which is mostly due to the dilution of natural levels of 14 C by 14 C-free fossil fuel CO 2 . This decrease is equal to that expected in surface waters of the subtropical gyres, and indicates that the surface waters of the North Pacific were in steady s…
Magnesium Perchlorate as an Alternative Water Trap in AMS Graphite Sample Preparation
We present a brief discussion of sample preparation procedures at the Keck Carbon Cycle Accelerator Mass Spectrometer (KCCAMS), University of California, Irvine, and a systematic investigation of the use of Mg(ClO 4 ) 2 as an absorptive water trap, replacing the standard dry ice/ethanol cold finger in graphite sample preparation. We compare high-precision AMS measurement results from oxalic acid I and USGS coal samples using Mg(ClO 4 ) 2 under di…
AMS 14 C Sample Preparation at the KCCAMS/UCI Facility
We present an overview of accelerator mass spectrometry (AMS) radiocarbon sample preparation and measurements, describing the technical upgrades that now allow us to routinely obtain 0.2–0.3% precision for 1-mg carbon samples. A precision of ∼1% on samples with 100 μg of carbon can also be achieved. We have also developed graphitization techniques and AMS procedures for ultra-small samples (down to 0.002 mg of carbon). Detailed time series are pr…
Changes of Subtropical North Pacific Radiocarbon and Correlation with Climate Variability
We show that high-precision radiocarbon (Δ 14 C) measurements from annual bands of a Hawaiian surface coral decreased by 7‰ from AD 1893 to 1952. This decrease is coincident with the Suess Effect, which is mostly due to the dilution of natural levels of 14 C by 14 C-free fossil fuel CO 2 . This decrease is equal to that expected in surface waters of the subtropical gyres, and indicates that the surface waters of the North Pacific were in steady s…
Changes of Subtropical North Pacific Radiocarbon and Correlation with Climate Variability
We show that high-precision radiocarbon (Δ 14 C) measurements from annual bands of a Hawaiian surface coral decreased by 7‰ from AD 1893 to 1952. This decrease is coincident with the Suess Effect, which is mostly due to the dilution of natural levels of 14 C by 14 C-free fossil fuel CO 2 . This decrease is equal to that expected in surface waters of the subtropical gyres, and indicates that the surface waters of the North Pacific were in steady s…
Magnesium Perchlorate as an Alternative Water Trap in AMS Graphite Sample Preparation
We present a brief discussion of sample preparation procedures at the Keck Carbon Cycle Accelerator Mass Spectrometer (KCCAMS), University of California, Irvine, and a systematic investigation of the use of Mg(ClO 4 ) 2 as an absorptive water trap, replacing the standard dry ice/ethanol cold finger in graphite sample preparation. We compare high-precision AMS measurement results from oxalic acid I and USGS coal samples using Mg(ClO 4 ) 2 under di…
Ultra small-mass AMS 14C sample preparation and analyses at KCCAMS/UCI Facility
AMS 14 C Sample Preparation at the KCCAMS/UCI Facility
We present an overview of accelerator mass spectrometry (AMS) radiocarbon sample preparation and measurements, describing the technical upgrades that now allow us to routinely obtain 0.2–0.3% precision for 1-mg carbon samples. A precision of ∼1% on samples with 100 μg of carbon can also be achieved. We have also developed graphitization techniques and AMS procedures for ultra-small samples (down to 0.002 mg of carbon). Detailed time series are pr…
Is a change in mode of travel to school associated with a change in overall physical activity levels in children? Longitudinal results from the SPEEDY study
Background Previous work suggests that children who use active modes of travel (walking or cycling) are more physically active overall than those who use motorised transport (car, bus or train). However, the majority of these studies used cross-sectional designs, and it is not known whether a shift in mode of travel to school is associated with a change in children's overall physical activity. Objective To investigate the relationship between cha…
PP12 Interventions to Promote Healthy Eating
OP48 Determinants of Active Commuting
Background Numerous cross-sectional studies have examined the associations between individual, psychological and environmental characteristics and active commuting, but few longitudinal studies exist to support more robust causal inference. Using two complementary approaches to longitudinal analysis, we aimed to build on this evidence by exploring whether (a) individual, psychological, workplace and route environmental characteristics, (b) change…
STI/HIV Sexual Risk Behavior and Prevalent STI Among Incarcerated African American Men in Committed Partnerships
Chemistry (3 works) · Chromatography (3 works) · Demography (3 works) · Environmental health (3 works) · Isotope Analysis in Ecology (3 works) · Medicine (3 works) · Poison control (3 works) · Sample Preparation (3 works) · Accelerator mass spectrometry (2 works) · Baseline (sea) (2 works)