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BOREAS TE-08 Aspen Bark Spectral Reflectance Data

The BOREAS TE-08 team collected in-lab spectral reflectance data for aspen bark and leaves from three sites within the BOREAS SSA from 24-May-1994 to 16-Jun-1994 (IFC 1), 19-Jul-1994 to 08-Aug-1994 (IFC 2), and 30-Aug-1994 to 19-Sep-1994 (IFC 3). One to nine trees from each site were sampled during the three IFCs. Each tree was sampled in five different locations for bark spectral properties: BS, US, BR, BT, and BO. Additionally, a limited number of LV were collected. Bark samples were removed from the stem of the tree and placed in ziplock bags for transport to UNH, where they were scanned with a spectroradiometer in a controlled environment. Each sample was scanned twice: the first set of measurements was made with the bark surface moistened, and the second set was made with the bark surface air-dried for a period of 30 minutes. These data represent continuous spectra of bark reflectance. Each sample was scanned three times, rotating the sample when possible. The reported values for each sample are an average over the three scans.

Biomass of Sacrificed Spruce/Aspen (SNF)

The purpose of the SNF study was to improve our understanding of the relationship between remotely sensed observations and important biophysical parameters in the boreal forest. A key element of the experiment was the development of methodologies to measure forest stand characteristics to determine values of importance to both remote sensing and ecology. Parameters studied were biomass, leaf area index, above ground net primary productivity, bark area index and ground coverage by vegetation. Thirty two quaking aspen and thirty one black spruce sites were studied. Aspen is an early successional, shade intolerant species. Aspen stands are essentially even aged, and stand age appears to be the most significant difference among sites in determining stand density, average diameter, and biomass density. Biomass density was highest in stands of older, larger trees and decreased in younger stands with smaller, denser stems. Since all aspen stands had closed canopies, the inverse relationship between biomass density and stem density suggests a series of stands in various stages of self thinning. Biomass density and projected LAI were much more variable for spruce than aspen. Spruce LAI and biomass density have a tight, nearly linear relationship. Stand attributes are often determined by site characteristics. Net primary productivity was estimated from the average radial growth over five years measured from the segments cut from the boles and the terminal growth measured as the height increase of the tree. Allometric equations were used to find the height and radial increment as a function of crown height and diameter at breast height. Spruce used an additional parameter of stem density. The models were used to back project five years and determine biomass at that time. The change in biomass over that time was used to determine the productivity. Measurements of sacrificed trees were used to develop relationships between the biophysical parameters (biomass, leaf area index, bark area index and net primary productivity) and the measurements made at each site (diameter at breast height, tree height, crown depth and stem density). These relationships were then used to estimate biophysical characteristics for the aspen and spruce study sites that are provided in the Forest Biophysical Parameters (SNF) data set.

BOREAS HYD-03 SSA/OLD Aspen DBH Data

The BOREAS HYD-03 team collected several data sets related to the hydrology of forested areas. This data set contains measurements of tree diameter at breast height (DBH) from a variety of sites. This study was undertaken to predict spatial distributions of energy transfer, snow properties important to the hydrology, remote sensing signatures, and transmissivity of gases through the snow and their relation to forests in boreal ecosystems.

Aspen Forest Cover by Stratum/Plot (SNF)

The purpose of the Superior National Forest (SNF) study was to improve our understanding of the relationship between remotely sensed observations and important biophysical parameters in the boreal forest. A key element of the experiment was the development of methodologies to measure forest stand characteristics to determine values of importance to both remote sensing and ecology. Parameters studied were biomass, leaf area index, above ground net primary productivity, bark area index and ground coverage by vegetation. Thirty two quaking aspen and thirty one black spruce sites were studied. For the aspen sites, in each plot a visual estimation of the percent coverage of the canopy, subcanopy and understory vegetation was made. The site averages of these coverage estimates are presented in this data set.

BOREAS TE-08 Aspen Bark Chemistry Data

The BOREAS TE-08 team collected pigment density data from aspen bark and leaves from four sites within the BOREAS SSA from 24-May-1994 to 16-Jun-1994 (IFC-1), 19-Jul-1994 to 08-Aug-1994 (IFC 2), and 30-Aug-1994 to 19-Sep-1994 (IFC-3). One to nine trees from each site were sampled during the three IFCs. Each tree was sampled in five different locations for bark pigment properties: basal stem section, which was any bark sample taken below one-half the tree height; upper stem section, which was any bark sample taken from the main stem above one-half the tree height; bark taken from branches up to 3 years old; a 2-year old branch segment; and a 1-year old branch segment. Additionally, a limited number of leaves were collected. Bark samples were removed from the stem of the tree, placed in ziplock bags, and transported to UNH, where they were processed and analyzed by a spectrophotometer. In each data file, samples are identified by Site, date, Tree#, and Sample Location (see 1st paragraph above). Pigment density values are normalized to mg/m2. Density values for the following pigments are provided: Chl a, Chl b, Total Chl (Chl a+b), Carotenoids, Chl a to b ratio, and the Total Chl to carotenoids ratio.

opencc-by-4.0Oct 2020View details →

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Secondary metabolites in leaves of hybrid aspen (Populus tremula L. × P. tremuloides Michx.)

<p>This data set was generated as part of the study "Secondary metabolites in leaves of hybrid aspen are affected by the competitive status and early thinning in dense coppices", published in Annals of Forest Science in 2020.</p>

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Aspen Plus models of the flash distillation process for stabilization of anaerobic digestate and synthesis of ammonium bicarbonate

<p>Aspen Plus models developed for validation of the simulation and to explore more processing conditions for the manufacturing of ammonium bicarbonate and stabilization of anaerobic digestate</p>

opencc-by-4.0May 2023View details →

A Study of Evorpacept (ALX148) With Azacitidine for Higher Risk Myelodysplastic Syndrome (ASPEN-02)

ClinicalTrials.gov study NCT04417517. IPD Sharing: NO. Countries: 3. Publications: 0.

A Study of Evorpacept (ALX148) in Patients With Advanced HER2+ Gastric Cancer (ASPEN-06)

ClinicalTrials.gov study NCT05002127. IPD Sharing: NO. Countries: 12. Publications: 0.

Evaluation of Aspen Spinous Process Fixation System and PLIF Technique for the Treatment of Low Back Pain

ClinicalTrials.gov study NCT01918943. IPD Sharing: Not stated. Countries: 1. Publications: 0.

Evorpacept (ALX148) in Combination With Pembrolizumab in Patients With Advanced Head and Neck Squamous Cell Carcinoma (ASPEN-03)

ClinicalTrials.gov study NCT04675294. IPD Sharing: NO. Countries: 9. Publications: 0.

Aspen Spinous Process Fixation System for Use in PLF in Patients With Spondylolisthesis

ClinicalTrials.gov study NCT01560273. IPD Sharing: UNDECIDED. Countries: 1. Publications: 0.

A Study of Evorpacept (ALX148) With Enfortumab Vedotin for Subjects With Urothelial Carcinoma (ASPEN-07)

ClinicalTrials.gov study NCT05524545. IPD Sharing: Not stated. Countries: 1. Publications: 0.

ASPEN-09: A Study of Evorpacept in Combination With Anti-cancer Therapies in Advanced / Metastatic Malignancies

ClinicalTrials.gov study NCT07007559. IPD Sharing: NO. Countries: 1. Publications: 0.

Evorpacept (ALX148) in Combination With Pembrolizumab and Chemotherapy in Patients With Advanced Head and Neck Squamous Cell Carcinoma (ASPEN-04)

ClinicalTrials.gov study NCT04675333. IPD Sharing: NO. Countries: 8. Publications: 0.

Aspen™ Ultrasound System and Aspen Rehabilitation Technique in the Treatment of Capsular Contracture

ClinicalTrials.gov study NCT02840084. IPD Sharing: NO. Countries: 1. Publications: 0.

Comparison of the Aspen Device Versus Pedicle Screws for Supplemental Posterior Fixation in Lumbar Interbody Fusion

ClinicalTrials.gov study NCT01549366. IPD Sharing: UNDECIDED. Countries: 1. Publications: 0.

Efficacy of the Aspen Spinous Process System in Anterior Lumbar Interbody Fusion (ALIF)

ClinicalTrials.gov study NCT01016314. IPD Sharing: UNDECIDED. Countries: 1. Publications: 0.