A MORPHOMETRIC SYSTEM FOR DESCRIBING THE MICROMORPHOLOGY OF ORGANIC SOILS AND ORGANIC LAYERS: FURTHER QUANTITATIVE AND QUALITATIVE CHARACTERIZATION

1985 ◽  
Vol 65 (4) ◽  
pp. 695-706 ◽  
Author(s):  
C. A. FOX
Keyword(s):  
Thin Section ◽  
Quantitative Information ◽  
Level Of Detail ◽  
Organic Soils ◽  
Organic Layer ◽  
Qualitative Information ◽  
Organic Layers ◽  
Level Ii ◽  
Distinct Morphology

At the first level of detail of description of a thin section, qualitative information about the occurrence of the fabric zones (regions of distinct morphology) and their basic morphologic units (the various components) were recorded with symbols in a fabric description symbol. At a second level of detail of description, Level II, additional quantitative and qualitative micromorphological information can be included with coding into the fabric description symbol according to the following. general format:[Formula: see text]At Level II description, quantitative information on the areal proportions of the fabric zones and basic morphologic units are recorded with indices in the fabric unit; qualitative data on the kind of boundary relationships between adjacent fabric zones, and quantitative data on the areal occurrence of the fabric zones are recorded with the modifier expression; and both quantitative and qualitative information on the occurrence, morphology, and arrangement of specific features observed in the fabric zones are recorded with the fabric unit descriptor. Depending on the requirements of a study, more than one fabric unit descriptor can be written for each fabric zone that is delineated in a thin section. The procedure for writing fabric description symbols at a Level II detail of description of a thin section is presented and applied to the characterization of the micromorphology of an organic layer from a Typic Mesisol. Key words: Micromorphology, descriptive method, organic soils, characterization

A MORPHOMETRIC SYSTEM FOR DESCRIBING THE MICROMORPHOLOGY OF ORGANIC SOILS AND ORGANIC LAYERS

1984 ◽  
Vol 64 (4) ◽  
pp. 495-503 ◽  
Author(s):  
C. A. FOX
Keyword(s):  
Granular Material ◽  
Key Words ◽  
Thin Section ◽  
Particulate Material ◽  
Organic Soils ◽  
Thin Sections ◽  
Organic Layers ◽  
Descriptive System ◽  
Descriptive Method

A descriptive system is outlined for characterizing, in thin sections, the micromorphology of organic soils and organic layers. In each thin section, distinct regions of morphology, fabric zones, can be recognized. Each fabric zone may be composed of various combinations of organic constituents. These constituents are designated as basic morphologic units and four main types are defined: particulate material, granular units, discrete compound particles, and massive-appearing fabric. The fabric zone and basic morphologic units can be coded in a fabric description symbol of the following simple general form [Fabric Unit]1 …[Fabric Unit]n, where [Fabric Unit] represents a particular fabric zone and its basic morphologic units. For example, [PpGa] [Ma] is a fabric description symbol indicating that two fabric zones are identified in the thin section. The first [PpBa] is the dominant fabric zone in the thin section (areal proportion) and is composed of two basic morphologic units, mainly recognizable plant fragments, Pp, and a lesser occurrence of amorphous granular material, Ga. The second fabric unit [Ma] indicates a fabric zone composed of one basic morphologic unit: amorphous massive-appearing fabric, Ma. The system is applied to the micromorphological characterization of a Typic Mesisol from Keswick, Ontario. Key words: Microcorphology, organic soils, descriptive method, characterization

Characterization of GaAs/AlGaAs quantum wells and quantum wires by chemical lattice imaging

1994 ◽  
Vol 52 ◽  
pp. 736-737
Author(s):  
A. Carlsson ◽  
J.-O. Malm ◽  
A. Gustafsson
Keyword(s):  
Quantum Well ◽  
Quantum Wells ◽  
Quantum Wires ◽  
Vapour Phase ◽  
Quantitative Information ◽  
Lattice Imaging ◽  
Vapour Phase Epitaxy ◽  
Metalorganic Vapour Phase Epitaxy ◽  
High Resolution Images

In this study a quantum well/quantum wire (QW/QWR) structure grown on a grating of V-grooves has been characterized by a technique related to chemical lattice imaging. This technique makes it possible to extract quantitative information from high resolution images.The QW/QWR structure was grown on a GaAs substrate patterned with a grating of V-grooves. The growth rate was approximately three monolayers per second without growth interruption at the interfaces. On this substrate a barrier of nominally Al0.35 Ga0.65 As was deposited to a thickness of approximately 300 nm using metalorganic vapour phase epitaxy . On top of the Al0.35Ga0.65As barrier a 3.5 nm GaAs quantum well was deposited and to conclude the structure an additional approximate 300 nm Al0.35Ga0.65 As was deposited. The GaAs QW deposited in this manner turns out to be significantly thicker at the bottom of the grooves giving a QWR running along the grooves. During the growth of the barriers an approximately 30 nm wide Ga-rich region is formed at the bottom of the grooves giving a Ga-rich stripe extending from the bottom of each groove to the surface.

scholarly journals Cardiac Computed Tomography Radiomics for the Non-Invasive Assessment of Coronary Inflammation

Cells ◽  
2021 ◽  
Vol 10 (4) ◽  
pp. 879
Author(s):  
Kevin Cheng ◽  
Andrew Lin ◽  
Jeremy Yuvaraj ◽  
Stephen J. Nicholls ◽  
Dennis T.L. Wong
Keyword(s):  
Cardiac Computed Tomography ◽  
Quantitative Information ◽  
Imaging Biomarkers ◽  
Great Promise ◽  
Non Invasive ◽  
Quantitative Image ◽  
Artery Disease ◽  
Therapeutic Decision Making ◽  
Underlying Pathophysiology

Radiomics, via the extraction of quantitative information from conventional radiologic images, can identify imperceptible imaging biomarkers that can advance the characterization of coronary plaques and the surrounding adipose tissue. Such an approach can unravel the underlying pathophysiology of atherosclerosis which has the potential to aid diagnostic, prognostic and, therapeutic decision making. Several studies have demonstrated that radiomic analysis can characterize coronary atherosclerotic plaques with a level of accuracy comparable, if not superior, to current conventional qualitative and quantitative image analysis. While there are many milestones still to be reached before radiomics can be integrated into current clinical practice, such techniques hold great promise for improving the imaging phenotyping of coronary artery disease.

Effect of forest harvesting and slash piling on microbial biomass and respiration in Newfoundland boreal forests

2007 ◽  
Vol 87 (4) ◽  
pp. 455-458 ◽  
Author(s):  
Martin T Moroni ◽  
Paul Q Carter ◽  
Dean W Strickland ◽  
Franz Makeschin ◽  
Don-Roger Parkinson ◽  
...  
Keyword(s):  
Microbial Biomass ◽  
Key Words ◽  
Boreal Forests ◽  
Fungal Biomass ◽  
Forest Harvesting ◽  
Organic Layer ◽  
Total Microbial Biomass ◽  
Organic Layers ◽  
Respiration Rates ◽  
Fumigation Extraction

Clearcutting Newfoundland boreal forests significantly reduced organic layer fungal and total microbial biomass in clearcut areas with and without slash cover, compared with forested plots. However, aerobically incubated respiration rates were highest in organic layers from clearcut areas under slash, intermediate under forests, and lowest from clearcut areas without slash. Key words: Carbon, ergosterol, fumigation–extraction, fungal biomass, harvest slash, nitrogen

Wounding of aspen roots promotes suckering

2004 ◽  
Vol 82 (3) ◽  
pp. 310-315 ◽  
Author(s):  
Erin C Fraser ◽  
Victor J Lieffers ◽  
Simon M Landhäusser
Keyword(s):  
Populus Tremuloides ◽  
Growth Rates ◽  
Growing Season ◽  
Organic Layer ◽  
Trembling Aspen ◽  
Layer Depth ◽  
Injury Type ◽  
Organic Layers ◽  
Root Injury ◽  
Root Sucker

In early May, 1-m sections of trembling aspen (Populus tremuloides Michx.) roots in a forest cutblock were carefully exposed and examined for damage. Undamaged roots were subjected to one of three wounding treatments (scrape, sever, or uninjured control) and were then reburied to either the full normal organic layer depth or to one third of the normal depth. Following one growing season, the roots were reexposed and assessed for aspen sucker numbers and growth rates. Results indicate that injured roots produced suckers nearly twice as often as uninjured roots. Further, injured roots produced more suckers per root, and these suckers were taller and had greater leaf area. Roots buried under shallow organic layers also generated more suckers, regardless of injury type. The side of injury (distal or proximal) did not affect any of the measured variables. The present study suggests that moderate wounding of aspen roots increases initial sucker numbers and growth rates.Key words: trembling aspen, root sucker, root injury, regeneration.

Magnetic, in situ, mineral characterization of Chelyabinsk meteorite thin section

2015 ◽  
Vol 50 (6) ◽  
pp. 1112-1121 ◽  
Author(s):  
Ladislav Nabelek ◽  
Martin Mazanec ◽  
Simon Kdyr ◽  
Gunther Kletetschka
Keyword(s):  
Thin Section ◽  
Chelyabinsk Meteorite ◽  
Mineral Characterization

scholarly journals Indigenous Peoples in Nepal's Forestry Sector Public Discourses

2020 ◽  
Vol 35 (1) ◽  
pp. 121-138
Author(s):  
Jailab Kumar Rai
Keyword(s):  
Indigenous Peoples ◽  
Quantitative Information ◽  
Qualitative Information ◽  
Five Dimensions ◽  
The Public ◽  
Public Events ◽  
Forestry Sector ◽  
Physical Presence ◽  
Number Of Publications ◽  
Number Of Authors

This paper attempts to unfold Nepal's forestry sector discourses from the perspectives of the presence and contribution of indigenous peoples in forestry sector public discourses. The paper deals with five dimensions of indigenous peoples as part of public discourses. They include: (a) policies and legislations;(b) physical presence in the forestry sector government institutions; (c) number of publications; (d) number of authors; and (e) presence in the public events. The qualitative information, derived from the participation and observation of the public events, is complemented by quantitative information compiled from the relevant reports and publications. I found that participation and contribution of indigenous peoples in Nepal's forestry sectors pubic discourses is relatively less. I argue that inadequacy of Nepal's forestry sector policies and practices is a replication of the overall situation of Nepali society that has fostered the exclusion of indigenous peoples.

scholarly journals Isolation Detection and Characterization of Syringolin A produced from the Probiotic Strain Bacillus Cereus Isolated from Donkey Milk

2018 ◽  
Vol 1 (2) ◽  
Author(s):  
Rashmi D ◽  
Sharmila T ◽  
Sushama Patil ◽  
Onkar Apine ◽  
Srinivas Sistla ◽  
...  
Keyword(s):  
Probiotic Strain ◽  
Uv Spectra ◽  
Organic Layer ◽  
Characteristic Peak ◽  
Antitumor Compound ◽  
Solvent Systems ◽  
Culture Supernatants ◽  
Layer Chromatography ◽  
Economical Process

Syringolin A is a non-ribosomal virulence factor secreted by few Pseudomonas strains. Syringolin A is an well known irreversible proteasome inhibitor and antitumor compound. The present study is focused on the extraction of Syringolin A through a non-tedious and economical process. Syringolin A is extracted from culture supernatants by the immiscible organic layer by mixing of dichloromethane or chloroform (trichloromethane). Syringolin A was identified by the characteristic peak at 350 nm by UV spectra. The compound was further characterized by Thin Layer Chromatography (TLC) with the retention value, Rf was found to be in the range of 0.78-0.83 run using a combination of solvent systems water and methanol.  The molecular weight of the compound was found to be 492.2614 g mol-1 identified and analyzed by UHPLC–QTOF-MS analysis. Due to its significant pharmacological importance in proliferative diseases, further studies on production and optimization of these compounds are necessary.   

Measuring unsaturated hydraulic conductivity (K(ψm)) of the F and H soil organic layers at small matric potential (ψm)

2011 ◽  
Vol 91 (6) ◽  
pp. 965-968
Author(s):  
B. Wilske ◽  
E. A. Johnson
Keyword(s):  
Hydraulic Conductivity ◽  
Large Data ◽  
Cold Climate ◽  
Organic Layer ◽  
Matric Potential ◽  
Large Variability ◽  
Organic Layers ◽  
Soil Organic Layer ◽  
Unsaturated Hydraulic Conductivity ◽  
Constant Head

Wilske, B. and Johnson, E. A. 2011. Measuring unsaturated hydraulic conductivity (K(ψm)) of the F and H soil organic layers at small matric potential (ψm). Can. J. Soil Sci. 91: 965–968. K(ψm) of the soil organic layers is a key parameter to assess water redistribution in cold-climate forests. This study tested the twin suction disc apparatus (TSD) as a new method to measure K(ψm) of the F and H layers directly. We compared the results to two studies. One represents a large data base, the other used similar sample locations; but both derived K(ψm) from combining two methods, i.e., pressure plate measurements combined with the instantaneous profile technique or the constant head approach. The TSD data are consistent with previous results considering the large variability in K(ψm) from the combined methods. This suggests that the TSD method represents an alternative to determine K(ψm) of the soil organic layer.

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