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Ultraviolet radiation sensitivity of photosynthesis in phytoplankton from an estuarine environment
Ultraviolet radiation sensitivity photosynthesis in phytoplankton estuarine environment
2014/6/9
We have studied temporal variation in the sensitivity of phytoplankton photosynthesis to inhibition by ultraviolet radiation (UV; 280-400 nm) using biological weighting functions (BWFs) that quantify ...
Distribution and sources of cyclic pheophorbides in the marine environment
Distribution sources cyclic pheophorbide marine environment
2014/6/17
The labile chlorophyll a (Chl a1 ) degradation product, 132 ,17 3 -cyclopheophorbide a enol (CPP516), was only recently found in marine sediments, where it can contribute a significant fraction to sol...
Structural environment of krypton dissolved in vitreous silica
Structural environment krypton dissolved vitreous silica X-ray
2012/4/1
X-ray absorption measurements on Kr dissolved homogeneously in vitreous silica (1.97 wt% Kr)
have been carried out at the Kr K-edge at 4.5 K, representing the first direct determination of the sites
...
Mg-Smectite Authigenesis in a Marine Evaporative Environment, Salina Ometepec, Baja California
Baja California Early Diagenesis Hypersaline Brines K-smectite Mg-smectite Salina Ometepec Saponite Trioctahedral Smectite
2011/12/7
Abstract: Formation of authigenic trioctahedral Mg-rich smectite is common in evaporative lake sediments, but was not described previously in modern marine evaporative environments. This study documen...
Microbial oxidation of pyrite: Experiments using microorganisms from an extreme acidic environment
Microbial oxidation microorganisms acidic environment
2012/4/1
Surface colonization and microbial dissolution of pyrite were studied in the laboratory and by in situ surface colonization experiments conducted at Iron Mountain, California.Laboratory experiments in...
The Effect of Storage Environment on Seed Survival and The Accumulation of Chromosomal Aberrations in Pea Landraces and Cultivars (Pisum sativum L.)
Pisum sativum pea seed viability chromosomal aberrations
2010/3/23
The relationship between loss of seed viability and the accumulation of chromosomal aberrations was investigated in both landraces and cultivars of the pea ( Pisum sativum L.). It was shown here, for ...
The influence of water on the environment of transition metals in silicate glasses
The influence water environment transition metals silicate glasses
2012/3/30
The effect of water (5 H2O 1 OH) on the environment of Co21and Ni21 in albite glass was investigated by electronic absorption spectroscopy. The visible spectra of Co21-doped glasses change only slight...
Effect of the Presence of Aluminum ions in Iron Solutions on the Formation of Iron Oxyhydroxides (FeOOH) at Room Temperature Under Acidic Environment
Akaganeite Aluminum Hydroxy-aluminum ions Iron hydrolysis Transmission electron microscopy X-ray diffraction
2011/12/29
The hydrolytic behavior of Fe solutions at room temperature under acidic conditions was investigated. In the presence of Al ions, with Cl and NO3 as associated anions, the Fe hydrolysis began almost i...
Weathering of Spodumene to Smectite in a Lateritic Environment
Ion-beam thinning Non-crystalline weathering products Smectite Spodumene Transmission electron microscopy
2011/12/30
Weathering of spodumene in a lateritized pegmatite in Western Australia was studied by investigating in situ samples by electron-beam techniques. The spodumene had mostly altered to smectite. However,...
Synthetic Allophane and Layer-Silicate Formation in SiO2-Al2O3-FeO-Fe2O3-MgO-H2O Systems at 23°C and 89°C in a Calcareous Environment
Allophane Hisingerite Hydrous feldspathoid Nontronite Poorly-ordered layer silicates “Protoimogolite” Saponite Synthesis
2012/1/4
Solutions containing AlCl3 and Si(OH)4 (concentrations ≤ 1.5 mM with molar Si:Al ratios of 1:2, 1:1 and 3:1) and FeCl2 (0, 0.5 and 1.0 mM) were adjusted to pH 8 with Ca(OH)2, and incubated at 23°C and...
Properties of Iron Oxides in Two Finnish Lakes in Relation to the Environment of Their Formation
Al-substitution Ferrihydrite Genesis Goethite Iron oxide Lake environment
2012/1/11
Fifteen iron oxide accumulations from the bottoms of two Finnish lakes (搇ake ores? were found to contain as much as 50% Fe. Differential X-ray powder diffraction and selective dissolution by oxalate s...
Vermiculite, mixed-layer vermiculite-phlogopite, and smectite are presently forming from igneous and metamorphic bedrock in the alpine zone of the northern Cascades, Washington. In addition, south-fac...