Search results for "Fas"

Excitation energy transfer in isolated chlorosomes from Chloroflexus aurantiacus

2009

Abstract Chlorosomes from green photosynthetic bacteria Chloroflexus aurantiacus have been studied by time-resolved femtosecond transient absorption spectroscopy. The fastest kinetics of 200–300 fs resolved, was interpreted to stem for intra-chlorosomal excitation energy transfer. Energy transfer from the antenna to the baseplate appeared as a major 9.2 ps rise component detected at the baseplate probe wavelength. Excitation energy transfer rates were evaluated for a model chlorosome. Calculated rod to rod, and rods to baseplate rate constants of 200–400 fs and 10–20 ps, respectively, are in accord with the experimental results.

Excitation Energy Transfer in Isolated Chlorosomes from Chlorobaculum tepidum and Prosthecochloris aestuarii

2012

Excitation energy transfer in chlorosomes from photosynthetic green sulfur bacteria, Chlorobaculum (Cba.) tepidum and Prosthecochloris (Pst.) aestuarii, have been studied at room temperature by time-resolved femtosecond transient absorption spectroscopy. Bleach rise times from 117 to 270 fs resolved for both chlorosomes reflect extremely efficient intrachlorosomal energy transfer. Bleach relaxation times, from 1 to 3 ps and 25 to 35 ps, probed at 758 nm were tentatively assigned to intrachlorosomal energy transfer based on amplitude changes of the global fits and model calculations. The anisotropy decay constant of about 1 ps resolved at 807 nm probe wavelength for the chlorosomes from Chlo…

Effects of an invasive crayfish on the littoral macroinvertebrates of large boreal lakes are habitat specific

2013

Summary Invasive crayfish are widely acknowledged to have negative effects on benthic food webs in lakes, but few studies have investigated such effects at wider spatial scales and in varying habitats under natural conditions. We examined the effects of introduced signal crayfish (Pacifastacus leniusculus) on the macroinvertebrate assemblages of different habitats in two large boreal lakes. We evaluated whether the density, taxon richness and species composition are altered by the non-native crayfish and whether the responses are similar for stony and vegetated habitats and across a depth gradient. We also studied the influence of crayfish on periphyton biomass at stony sites, as a potentia…

The introduced signal crayfish and native noble crayfish have different effects on sublittoral macroinvertebrate assemblages in boreal lakes

2015

Chapter 2 Fasciola, Lymnaeids and Human Fascioliasis, with a Global Overview on Disease Transmission, Epidemiology, Evolutionary Genetics, Molecular …

2009

Abstract Fascioliasis, caused by liver fluke species of the genus Fasciola, has always been well recognized because of its high veterinary impact but it has been among the most neglected diseases for decades with regard to human infection. However, the increasing importance of human fascioliasis worldwide has re‐launched interest in fascioliasis. From the 1990s, many new concepts have been developed regarding human fascioliasis and these have furnished a new baseline for the human disease that is very different to a simple extrapolation from fascioliasis in livestock. Studies have shown that human fascioliasis presents marked heterogeneity, including different epidemiological situations and…

Female choice for male drumming in the wolf spiderHygrolycosa rubrofasciata

1997

Mate preferences in invertebrates have usually been studied with simultaneous choice exper- iments alone, which allows eVective detection of any preferences but does not tell much about the strength of inter-sexual selection. Under natural conditions females frequently have to rely on sequential choice, and choosy females may incur opportunity and direct costs such as loss of time when they reject a male. Female preference in the wolf spider Hygrolycosa rubrofasciata for two components of male courtship signalling, rate and volume, was investigated. Both of these characteristics were tested with a sequential choice set-up and the eVect of volume also with a simultaneous choice method. Femal…

Drosophila melanogaster overexpression FAS live longer

2018

FAS and FAS ligand is critical in the control of the extension of extrinsic pathway of apoptosis. In previous studies we have performed transcriptomics peripheral blood cells from centenarians, octogenarians and young persons and we found over expression in centenarians of the FAS receptor. To confirm the role of FAS ligand in longevity across animal species, we have generated Drosophila melanogaster that over expresses this gene using the GAL4-UAS technique. The results show that flies overexpressing FAS increase maximal longevity in twelve percent and average longevity in six percent. Therefore, we confirm that FAS is related to longevity flight.

Funcionamiento neurocognitivo y psicosocial de pacientes con trastorno bipolar en una unidad de salud mental

2018

INTRODUCCION: Existe evidencia de que los pacientes que padecen Trastoro Bipolar (TB), e incluso sus familiares sanos, presentan patrones característicos de afectación de ciertos dominios neurocognitivos que persisten tras la remisión clínica o período de eutimia. La pérdida de funcionalidad psicosocial de estos pacientes se predice mejor con la presencia de alteraciones cognitivas que con variables clínicas o evolutivas. El clínico asistencial debería conocer si existe afectación o deterioro en las funciones neurocognitivas de sus pacientes pero en el medio asistencial cotidiano es difícil poder evaluar adecuadamente las funciones cognitivas y tampoco se acostumbra a cuantificar la funcion…

On GPU-accelerated fast direct solvers and their applications in image denoising

2015

Muscle-Tendon Interaction During Human Dolphin-Kick Swimming

2019

Without high impact forces, it is not clear how humans can utilize tendon elasticity during low-impact activities. The purpose of the present study was to examine the muscle-tendon behavior together with the electromyographic (EMG) activities of the vastus lateralis (VL) muscle during the human dolphin-kicking. In a swimming pool, each subject (n = 11) swam the 25 m dolphin-kicking at two different speeds (NORMAL and FAST). Surface EMGs were recorded from the VL and biceps femoris (BF) muscles. Simultaneous recordings of the knee joint angle by electro-goniometer and of the VL fascicle length by ultrasonography were used to calculate the muscle-tendon unit and tendinous length of VL(L-MTU a…