Sustained positive BOLD (blood oxygen level-dependent) activity is employed extensively in functional magnetic resonance imaging (fMRI) studies as evidence for task or stimulus-specific neural responses. However, the presence of sustained negative BOLD activity (i.e., sustained responses that are lower than the fixation baseline) has remained more difficult to interpret. Some studies suggest th...

The enantiopure coordination polymer [Dy(hfac)3((S/R)-L)]n ([(S/R)-1]n) involving a BINOL-derived bisphosphate ligand (S/R)-L is investigated both in solution and solid-state.

Introduction The majority of studies investigating the linearity of the BOLD signal suggested existence of significant nonlinearity. In these studies, repeated stimuli led to successively smaller BOLD amplitudes and delayed BOLD onset latencies when the inter-stimulus interval (ISI) is shorter than a few seconds. The mechanism of nonlinearity in the BOLD signal remains unknown, partially becaus...

Background: Contributing factors for improved survival of human adipocytes mesenchymal stem cells (h-AMSCs) cultured through hypoxia preconditioning, in example apoptosis inhibition involving BCL2 and HSP27 expression, trigger signal expression (VEGF), SCF OCT-4 CD44+ expression. The objective if this study was to explain the mechanism role hypoxic preconditioning op...

Background: A Step I diet with lean beef compared with lean white meat both decrease LDL cholesterol. To our knowledge, no studies have evaluated a low–saturated fatty acid (SFA) (,7% calories) diet that contains lean beef. Objective: We studied the effect on LDL cholesterol of cholesterollowering diets with varying amounts of lean beef [ie, Dietary Approaches to Stop Hypertension (DASH): 28 g ...

Blood oxygenation level dependent functional magnetic resonance imaging (BOLD-fMRI), one of the most powerful technologies in neuroscience, measures neural activity indirectly. Therefore, systematic correlation of BOLD signals with other neural activity measurements is critical to understanding and then using the technology. Numerous studies have revealed that the BOLD signal is determined by m...

Introduction Spontaneous blood-oxygen-level-dependent (BOLD) fluctuations under the resting brain state have been widely observed and hypothesized to reflect the ongoing activity of the brain. An interesting question about such ongoing activity is if and how (if yes) it would affect task-evoked brain activity [1] which can be studied by fMRI (functional Magnetic Resonance Imaging) BOLD contrast...