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4 results for “needle concentration”
Black spruce needle nitrogen concentration from 1998
We collected black spruce needle from one site located near Fairbanks Ak (S1: 64o52.164? N, 147o51.462? W) in August 1998. The needles were collected from 10 different trees, 5 leafage classes, 3 layers, 2 aspectss, and 3 replicates of each. Nitrogen concentration was measured on these needles. Data analysis indicated that canopy aspect and height did not significantly influence needle concentration, but needle age (F = 555, P < 0.0001) and individual trees within a stand (F = 108, P < 0.0001) combined to explain over 90% of the variation in foliar N.
Black spruce needle nitrogen concentration from 5 stands in 1999
We collected black spruce needle from several sites located near Fairbanks Ak, and Delta, Ak in August 1999 (Sites designated here as S1, S2, and S3) were located in Fairbanks (64o40?N, 148o15?W), Alaska (S1: 64o52.164? N, 147o51.462? W; S2: 64o52.058? N, 147o51.378? W; S3: 64o51.603? N, 147o52.789? W) with 2 additional sites (S4, S5) in Delta, Alaska (64010? N, 145030? W). In each stand, 30 trees were randomly selected for sampling. Within each tree, five shoots were collected from the southern aspect of the mid-canopy height from each of the following age classes: 0-, 1-, 4-, 9-, and 19-years old. In two of the Fairbanks stands (S2, S3), 19-year old needles were not present. A total of 690 samples over the five stands include 150 samples per stand in three stands (S1, S4, S5) and 120 samples per stand in the other two stands (S2, S3). Needles were returned to the lab and nitrogen content was determined. We used a three-factor nested analysis of variance (ANOVA) to evaluate differences in needle N concentration among the ages of needles on a tree, among trees nested within a stand, and among stands. Ages and stands were treated as fixed factors and tree was treated as a random factor. The ANOVA and means testing for these differences used Proc GLM in the SAS statistical package with needle N content as the dependent variable and needle age, tree, and stand as independent variables. The GLM procedure handled the problem of missing treatment combinations within the ANOVA. Type III sum of squares was used to test the effects of factors without interactions
Evaluating Fine Needle Aspiration to Measure Hepatic Vaniprevir (MK-7009) Concentrations in Participants With Chronic Hepatitis C (MK-7009-048)
ClinicalTrials.gov study NCT01678131. IPD Sharing: YES. Countries: 0. Publications: 1.
Assessment of Concentric Needle Technique in Temporomandibular Joint (TMJ) Internal Derangement.
ClinicalTrials.gov study NCT05510336. IPD Sharing: Not stated. Countries: 0. Publications: 0.
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Allen Brain Atlas
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DANDI Archive for NWB datasets
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International Brain Laboratory public data
The International Brain Laboratory public data releases expose standardized mouse decision-making experiments, including Neuropixels recordings, widefield calcium imaging, behavior, and session metadata accessed through the ONE API.
OpenNeuro
OpenNeuro is a free, open platform for sharing neuroimaging datasets, with public search, dataset pages, and download paths for web, S3, DataLad, and the OpenNeuro CLI.