Problems Associated with the Use of Coal As a Source of14C-Free Background Material

Many14C dating laboratories have established that coal samples exhibit a finite14C age, apparently caused by contamination of the specimens before any laboratory preparation is undertaken. In this work, the possibility that the contamination is due to microbial and fungal activity in the coal substrate is considered and some suggestions are made for alternative sources of background test materials for14C dating laboratories. Initial results indicate that geologically formed graphites contain little14C and are likely to be good background test materials, especially in14C AMS laboratories.

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A NEW RAMPED PYROXIDATION/COMBUSTION FACILITY AT 14CHRONO, BELFAST: SETUP DESCRIPTION AND INITIAL RESULTS

Radiocarbon ◽

10.1017/rdc.2021.46 ◽

2021 ◽

pp. 1-14

Author(s):

Evelyn M Keaveney ◽

Gerard T Barrett ◽

Kerry Allen ◽

Paula J Reimer

Keyword(s):

Bulk Material ◽

Correction Method ◽

Source Attribution ◽

Radiocarbon Age ◽

Targeted Analysis ◽

Consensus Values ◽

Background Material ◽

Initial Results ◽

Blank Correction ◽

Good Agreement

ABSTRACT The Belfast Ramped Pyroxidation/Combustion (RPO/RC) facility was established at the 14CHRONO Centre (Queen’s University Belfast). The facility was created to provide targeted analysis of bulk material for refined chronological analysis and carbon source attribution for a range of sample types. Here we report initial RPO results, principally on background material, but also including secondary standards that are routinely analyzed at 14CHRONO. A description of our setup, methodology, and background (blank) correction method for the system are provided. The backgrounds (anthracite, spar calcite, Pargas marble) reported by the system are in excess of 35,000 14C years BP with a mean age of 39,345 14C years BP (1σ = 36,497–43,800 years BP, N=44) with F14C = 0.0075 ± 0.0032. Initial results for standards are also in good agreement with consensus values: TIRI-B pine radiocarbon age = 4482 ± 47 years BP (N=13, consensus = 4508 years BP); IAEA-C6 ANU Sucrose F14C= 1.5036 ± 0.0034 (N=10, consensus F14C = 1.503). These initial tests have allowed problematic issues to be identified and improvements made for future analyses.

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Electron Probe Analysis of Vertebrate Smooth Muscle: Distribution of Ca and Ci

Proceedings, annual meeting, Electron Microscopy Society of America ◽

10.1017/s0424820100091652 ◽

1976 ◽

Vol 34 ◽

pp. 334-335 ◽

Cited By ~ 1

Author(s):

Avril V. Somlyo ◽

H. Shuman ◽

A.P. Somlyo

Keyword(s):

Smooth Muscle ◽

Electron Probe ◽

Preliminary Report ◽

Cell Damage ◽

Electron Probe Analysis ◽

Perinuclear Space ◽

Probe Analysis ◽

High K ◽

Low K ◽

Initial Results

This is a preliminary report of electron probe analysis of rabbit portal-anterior mesenteric vein (PAMV) smooth muscle cryosectioned without fixation or cryoprotection. The instrumentation and method of electron probe quantitation used (1) and our initial results with cardiac (2) and skeletal (3) muscle have been presented elsewhere.In preparations depolarized with high K (K2SO4) solution, significant calcium peaks were detected over the sarcoplasmic reticulum (Fig 1 and 2) and the continuous perinuclear space. In some of the fibers there were also significant (up to 200 mM/kg dry wt) calcium peaks over the mitochondria. However, in smooth muscle that was not depolarized, high mitochondrial Ca was found in fibers that also contained elevated Na and low K (Fig 3). Therefore, the possibility that these Ca-loaded mitochondria are indicative of cell damage remains to be ruled out.

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High resolution two-dimensional motility mapping; Methodology and initial results

Gastroenterology ◽

10.1016/s0016-5085(01)81122-7 ◽

2001 ◽

Vol 120 (5) ◽

pp. A226-A226 ◽

Cited By ~ 1

Author(s):

W LAMMERS ◽

S DHANASEKARAN ◽

J SLACK ◽

B STEPHEN

Keyword(s):

High Resolution ◽

Two Dimensional ◽

Initial Results

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1103: Laparoscopic Salvage Nephrectomy after Targeted Neoadjuvant Therapy for Metastatic Renal Cell Carcinoma: Initial Results

The Journal of Urology ◽

10.1016/s0022-5347(18)31317-x ◽

2007 ◽

Vol 177 (4S) ◽

pp. 364-364 ◽

Cited By ~ 1

Author(s):

Surena F. Matin ◽

Christopher G. Wood ◽

Shi-Ming Tu ◽

Nizar M. Tannir ◽

Eric Jonasch

Keyword(s):

Renal Cell Carcinoma ◽

Cell Carcinoma ◽

Neoadjuvant Therapy ◽

Metastatic Renal Cell Carcinoma ◽

Renal Cell ◽

Initial Results

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Initial results of concordance between the biofield diagnostic system test (BDS) and Ki-67 labeling index to discriminate highly proliferating palpable breast lesions

European Journal of Cancer ◽

10.1016/s0959-8049(02)80483-x ◽

2002 ◽

Vol 38 (11) ◽

pp. S145

Author(s):

W Gatzemeier

Keyword(s):

Diagnostic System ◽

Labeling Index ◽

Breast Lesions ◽

Ki 67 ◽

Palpable Breast ◽

Biofield Diagnostic System ◽

Initial Results

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The Canadian Cardiovascular Society Heart Failure Guidelines implementation: initial results from the National Workshop Initiative

European Journal of Heart Failure Supplements ◽

10.1016/s1567-4215(08)60062-4 ◽

2008 ◽

Vol 7 ◽

pp. 22-22 ◽

Cited By ~ 1

Author(s):

J HOWLETT ◽

R MCKELVIE ◽

H ROSS ◽

M MARTIN ◽

C PULLEN ◽

...

Keyword(s):

Heart Failure ◽

Canadian Cardiovascular Society ◽

Guidelines Implementation ◽

National Workshop ◽

Initial Results

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The Reliability of Retrieval-Induced Forgetting

European Psychologist ◽

10.1027/1016-9040/a000040 ◽

2012 ◽

Vol 17 (1) ◽

pp. 1-10 ◽

Cited By ~ 6

Author(s):

Rosalind Potts ◽

Robin Law ◽

John F. Golding ◽

David Groome

Keyword(s):

Individual Differences ◽

Recognition Test ◽

Laboratory Tests ◽

The Other ◽

Clinical Factors ◽

Test Items ◽

T1 And T2 ◽

Test Materials ◽

Induced Forgetting

Retrieval-induced forgetting (RIF) refers to the finding that the retrieval of an item from memory impairs the retrieval of related items. The extent to which this impairment is found in laboratory tests varies between individuals, and recent studies have reported an association between individual differences in the strength of the RIF effect and other cognitive and clinical factors. The present study investigated the reliability of these individual differences in the RIF effect. A RIF task was administered to the same individuals on two occasions (sessions T1 and T2), one week apart. For Experiments 1 and 2 the final retrieval test at each session made use of a category-cue procedure, whereas Experiment 3 employed category-plus-letter cues, and Experiment 4 used a recognition test. In Experiment 2 the same test items that were studied, practiced, and tested at T1 were also studied, practiced, and tested at T2, but for the remaining three experiments two different item sets were used at T1 and T2. A significant RIF effect was found in all four experiments. A significant correlation was found between RIF scores at T1 and T2 in Experiment 2, but for the other three experiments the correlations between RIF scores at T1 and T2 failed to reach significance. This study therefore failed to find clear evidence for reliable individual differences in RIF performance, except where the same test materials were used for both test sessions. These findings have important implications for studies involving individual differences in RIF performance.

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