The southern Appalachian spruce-fir forest is a unique ecosystem in North America which consists of red spruce (Picea rubens) and Fraser fir (Abies Frasen). Found at elevations above 4500' and inhabiting 26,609 hectares in...
学科:
Red spruce decline -- Appalachian Region, Southern, Red spruce -- Effect of acid deposition on -- Appalachian Region, Southern, Red spruce -- Soils -- Appalachian Region, Southern, Red spruce -- Appalachian Region, Southern -- Composition, and Inductively coupled plasma spectrometry -- Appalachian Region, Southern
Red spruce (Picea rubens) trees are medium size conifers found in the Appalachian Mountains at high elevations (above 4500 ft.). Since the 1970’s, several reports indicate a decline of spruce-fir forests in the Southern...
关键词:
Acid Deposition, Environmental Chemistry, Inductively Coupled Plasma Optical Emission Spectrometry (ICP-OES), Red Spruce (Picea rubens), and Southern Appalachians Mountains
学科:
Red spruce -- Effect of acid deposition on -- Appalachian Region, Southern, Red spruce decline -- Appalachian Region, Southern, Red spruce -- Soils -- Appalachian Region, Southern, Red spruce -- Appalachian Region, Southern -- Composition, and Inductively coupled plasma spectrometry -- Appalachian Region, Southern
The Atacama Desert, located between the Pacific Ocean and the Andes in northern Chile and southern Peru, is one of the driest regions on the planet. In spite of the extreme aridity, the Atacama is traversed by the Rio Loa, a...
关键词:
antimony isotopes, Atacama Desert, Chuquicamata, El Tatio, Rio Loa, and sequential extraction
学科:
Contaminated sediments -- Chile -- Loa River, Trace elements in water -- Chile -- Loa River, Environmental geochemistry -- Chile -- Loa River, and Water -- Pollution -- Chile -- Loa River
Formaldehyde testing in poor communities can be limited by the capital costs of laboratory grade instruments. Not having access to these instruments could result in the water supply not being tested, which can lead to health...
学科:
Formaldehyde -- Spectra, Spectrum analysis, and Formaldehyde -- Testing
Airborne analytes are often hard to measure due to their small concentrations (ppm-ppb), espe-cially those in our atmosphere. Airborne analytes such as ozone, nitrogen dioxide, and black car-bon are commonly studied for their...
关键词:
CES, CRDS, and Low-cost
学科:
Cavity-ringdown spectroscopy, Analytical chemistry, and Spectrum analysis—Instruments
In recent years, the application of iron oxide nanoparticles for a myriad of research fields has opened many new avenues for possible biomedical applications. The potential to combine the paramagnetic property of iron oxide...
关键词:
Biomedical, Doped, Europium, Lanthanide, Magnetite, and Nanoparticle
Lanthanide metal ions exhibit fascinating optical and magnetic properties. Lanthanide-based nanomaterials have potential applications in optical devices, telecommunication, electroluminescent devices, bio-analytical sensors,...
关键词:
Europium Nanoparticles, Luminescence, Quantum yields, Sensitization, and Upconversion
Microfluidic paper-based analytical devices (µPADs) have been developed using several patterning technologies to reproducibly create inexpensive lab-on-chip type analytical tools. Consequently, these devices are useful for...
关键词:
calcium and magnesium, chelate titrations, microfluidic paper based analytical devices, and water hardness
学科:
Microfluidic devices -- Design and construction, Detectors -- Design and construction, Water -- Analysis, Calcium ions, Magnesium ions, and Water -- Hardness
The Boron atom has seen an increase in usefulness over the last half century due in part to the unique properties of boron that allow for dative binding. Aspects of the boron-nitrogen bond were examined through both...
关键词:
Boron Nitrogen Dative bonding and Boroxine Fluorescence
This study explores the influence of surface charge on the adsorption mechanism of Cu(II) onto ground peanut hulls at different pH values. Ground hulls can be separated into two types based on their density. For both types of...
关键词:
adsorption, biosorption, copper, peanut hulls, pH, and surface charge
学科:
Adsorption, Copper, Hydrogen-ion concentration, and Peanuts
