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... Mitochondrial aldehyde dehydrogenase (ALDH2) is the major ALDH isozyme involved in acetaldehyde metabolism. It is well established that a single nucleotide substitution (G to A) leads to the amino acid change (Glu487Lys) and dominant inactivation of ALDH2 activity. Inactivation of ALDH2 activity causes the aversive reactions associated with “flushing” response observed in many East Asian people fo ...
botanical composition; vegetation cover; data analysis; remote sensing; accuracy; stand structure; forests; Lassen National Forest; California; Modoc National Forest
Abstract:
... The accuracy of a northeastern California vegetation map was assessed using the data from a grid of permanent Forest Inventory and Analysis (FIA) plots collected by Region 5 and the Pacific Northwest Research Station (PNW). The map was assessed in three parts: the Modoc National Forest, the Lassen National Forest and the lands outside National Forest boundaries. Accuracy was assessed hierarchicall ...
wood; tree age; testing; acoustic properties; wood quality; lumber; stand characteristics; Tsuga heterophylla; Picea sitchensis; nondestructive methods; Alaska
Abstract:
... With the move to intensive forest management to meet wood demand and to preserve the environment, southeast Alaska is experiencing a period of significant change in terms of wood characteristics or wood quality. In order to responsibly manage the young-growth stands, it is important to evaluate tree quality prior to harvest and understand the product and economic potential of the wood fiber in sta ...
animal manures; pyrolysis; activated carbon; adsorbents; adsorption; mercury; pollution control; air; gas emissions; coal; burning; byproducts; power plants; filtration; animal manure management; waste utilization; powders; air pollution
Abstract:
... Increased emphasis on reduction of mercury emissions from coal fired electric power plants have resulted in environmental regulations that may in the future require application of activated carbons as mercury sorbents. The sorbents could be injected into the flue gas stream where it adsorbs the mercury. The sorbent (now containing mercury) would be removed via filtration or other means from the fl ...
Weighing Lysimeter Data for The Bushland, Texas Alfalfa Datasets Evapotranspiration, Irrigation, Dew/frost - Water Balance Data for The Bushland, Texas Alfalfa Datasets Growth and Yield Data for the Bushland, Texas Alfalfa Datasets The Bushland, Texas, Alfalfa Datasets
tropical forests; allometry; equations; forest inventory; mixed forests; biomass; forest trees; stems; volume; tree and stand measurements; regression analysis; statistical models; Puerto Rico
Abstract:
... We used forest inventory data, intensive tree measurement, destructive sampling in the field, and subsequent laboratory analyses to develop regression equations that estimate tree biomass, merchantable volume, and total volume for upland forests in Puerto Rican subtropical dry forest. Most parsimonious and additive biomass equations for mixed, dry forest species were fitted to data from 30 destruc ...
estimation; ammonia; diet; chemiluminescence; feeds; winter; nitrogen; feedlots; body weight; air temperature; beef cattle; cattle manure; wind speed; summer; gas emissions; phosphorus; air pollution; Texas; High Plains (United States)
Abstract:
... Micrometeorological methods used to estimate emissions are advantageous because they are noninterfering and can integrate fluxes over large areas. They have not been routinely applied to beef cattle feedyards, where physical complexity and the possibility of disturbed air flow may be problematic. Our objective was to use the flux-gradient method to estimate NH3 emissions from beef cattle feedyard ...
... Runoff volumes from plots can be quite variable. These variations can be important for understanding the hydrologic system, and also to evaluating the effectiveness of infiltration and runoff prediction models. We investigated the sources of variability among 40 replications in a previously reported experiment on fallow plots. A numerical model was calibrated using data from the experiment and fro ...
... Clostridium butyricum is an anaerobic bacterium that inhabits broad niches. Clostridium butyricum is known for its production of butyrate, 1,3-propanediol, and hydrogen. This study aimed to present a comparative pangenome analysis of 24 strains isolated from different niches. We sequenced and annotated the genome of C. butyricum 3-3 isolated from the Chinese baijiu ecosystem. The pangenome of C. b ...
... Risk is an intrinsic part of cropping systems and cropping system management. A stochastic budgeting example using field plot data is used to illustrate common sources of risk and methods producers use to deal with risk. An additional example utilizes crop simulation modeling to illustrate the potential importance of timeliness risk in cropping system choices. The examples provide a framework for ...
... The Annualized Agricultural Nonpoint Source Pollution model (AnnAGNPS 2.0) has been developed as a technological tool that can be used to estimate watershed response to agricultural management practices. AnnAGNPS 2.0 has been used for the Deep Hollow watershed of the Mississippi Delta Management System Evaluation Area (MDMSEA) project for nitrogen loadings assessment. From sensitivity analyses, so ...
range management; correlation; shrublands; rangelands; Universal Soil Loss Equation; soil erosion; measurement; prairies; Revised Universal Soil Loss Equation; prediction; Western United States
... Molecular techniques have now been widely applied in many disciplines of biological sciences including fungal identification in microbial ecology and in plant pathology. In plant pathology, it is now common to use molecular techniques to identify and study plant pathogens of many agronomical and horticultural crops including cool season grain legume crops. In this chapter, we present two examples ...
in vivo studies; dual-energy X-ray absorptiometry; magnetic resonance imaging; anthropometric measurements; histidine; biomarkers; nitrogen; skeletal muscle; chemical analysis; models; body composition; human health; creatinine; potassium; bioelectrical impedance; computed tomography; metabolites
... Black ash (Fraxinus nigra) is an important component of wetland forests throughout the Upper Midwest and northeastern United States and is highly valued for paneling, furniture, and basketry. Decline of black ash has been noted with increasing frequency, although no detailed studies of the pattern of decline across the region have been done. From analyses of Forest Health Monitoring aerial sketchm ...
soil quality; air temperature; cropping systems; weather; crop yield; Great Plains region
Abstract:
... Soils serve a multitude of functions and play an important role in environmental quality through interactions with the hydrosphere and the atmosphere. Long-term studies are usually required to compare management effects on the soil resource to make soil quality assessments. This requirement exists because of the effect annual variations in weather have on the system and also because we are often t ...
... Conventional soil tests, culture-based microbial methods, and the novel method of 15N-DNA stable isotope probing (SIP) were employed to illustrate atrazine biodegradation as related to the physiochemical properties of an atrazine-exposed Cisne soil. This soil exhibited enhanced atrazine degradation. Mineralization underestimated the rate of atrazine dissipation demonstrated by the accumulation of ...
snags; geographical distribution; species diversity; forests; forest inventory; fuel loading; fuels (fire ecology); decayed wood; biomass; forest health; United States
Abstract:
... Standing dead trees in forests of the United States serve as wildlife habitat, a fuel loading component, and carbon stocks. Although standing dead trees are a vital component of forest ecosystems, information regarding this resource across the Nation is lacking. The first annual inventory of standing dead trees across the United States was initiated in 1999, resulting in a comprehensive assessment ...
hydrologic models; watershed hydrology; watershed management; geographic information systems; landscapes; decision support systems
Abstract:
... The Automated Geospatial Watershed Assessment (AGWA, see: www.tucson.ars.ag.gov/agwa) tool is a GIS interface jointly developed by the USDA-Agricultural Research Service, the U.S. Environmental Protection Agency, the University of Arizona, and the University of Wyoming to automate the parameterization and execution of the Soil Water Assessment Tool (SWAT) and KINEmatic Runoff and EROSion (KINEROS2 ...
hydrologic models; watershed hydrology; geospatial data processing; geographic information systems; runoff; water erosion; water flow; model validation; Arizona
Abstract:
... The Automated Geospatial Watershed Assessment Tool (AGWA) is a GIS-based hydrologic modeling tool that is available as an extension for ArcView 3.x from the USDA-ARS Southwest Watershed Research Center (www.tucson.ars.ag.gov/AGWA/) and US-EPA BASINS website (www.epa.gov/OST/BASINS/). AGWA was designed to facilitate the assessment of land-use and climate-change impacts on water yield and quality at ...