Mudstone samples from the Moreno (Upper Cretaceous-Paleocene) and Kreyenhagen (Eocene) formations are analysed using X-ray diffraction (XRD) fluorescence (XRF) to determine their mineralogy. Smectite (Reichweite R0) is predominant phyllosilicate present, 48% 71.7% bulk rock mineralogy (excluding carbonate cemented highly bio siliceous samples) 70% 98% of <2 μm clay fraction. Opal CT less so ...

The reproductive behaviour of the sexually coercive male eastern mosquitofish (Gambusia holbrooki) offers an excellent model system for testing the benefits of reversible thermal acclimation responses to mating success. We acclimated male mosquitofish to either 18 or 30 degrees C (14 h light:10 h dark) for six weeks and tested their ability to obtain coercive copulations in the presence and the...

Fluorescence imaging using FM 1-43 and related styryl dyes has provided invaluable insights into presynaptic function of synapses in culture preparations, but has been limited in use for studying central synapses in vivo or in brain slices, because of excessive fluorescence background due to nonspecific membrane binding of dye. We demonstrate here that focal excitation of FM dyes using two-phot...

BACKGROUND Sputum microscopy is the only diagnostic for tuberculosis (TB) available at peripheral levels of health service in resource-poor countries. Its sensitivity is reduced in high HIV-prevalence settings. Sodium hypochlorite (NaOCl) specimen sedimentation prior microscopy and light-emitting diode (LED)-fluorescence microscopy (FM) can individually improve performance of microscopy. This s...

BACKGROUND Flooding causes substantial stress for terrestrial plants, particularly if the floodwater completely submerges the shoot. The main problems during submergence are shortage of oxygen due to the slow diffusion rates of gases in water, and depletion of carbohydrates, which is the substrate for respiration. These two factors together lead to loss of biomass and eventually death of the su...

Snow cover on sea ice is the most important factor controlling light availability for algae, but it predicted by climate models to become more variable and stochastic. Here, we document effects of a sudden, complete loss entire snow first-year at Kangerlussuaq Fjord, West Greenland, due natural Föhn wind event that caused ca. 17 °C air temperature increase over 36 h. We applied Imaging-PAM fluo...

Afforestation of contaminated areas is considered as a possible strategy for reduction of contaminations. In the present study, the effects of lead (Pb) and cadmium (Cd) were investigated on chlorophyll fluorescence parameters (Fv/Fm, Fo, and Fm), photosynthetic pigments (chlorophyll a, b, and total chlorophyll), and proline in one-year-old seedlings of Celtis caucasica and Robinia pseudoacacia...

This paper considers the incentive compatibility in many-to-many two-sided matching problems. We first show that the Blocking Lemma holds for many-to-many matchings under the extended max-min preference criterion and quota-saturability condition. This result extends the Blocking Lemma for one-to-one matching and for many-to-one matching to many-to-many matching problem. It is then shown that th...

(Chlorophyll fluorescence parameters in populations of two legume trees: Stryphnodendron adstringens (Mart.) Coville (Mimosoideae) and Cassia ferruginea (Schrad.) Schrad. ex DC. (Caesalpinoideae)). The aim of this study was to investigate the photosynthetic performance in populations of two legume tree species, Stryphnodendron adstringens (Mimosoideae), typical from Cerrado, and Cassia ferrugin...