submitted by stillo 1 hour ago
We analyze, using an instrumental variable approach, the effect of the number of fast-food restaurants on school level obesity rates in Arkansas. Using distance to the nearest major highway as an instrument, our results suggest that exposure to fast-food restaurants can impact weight outcomes. Sp...
submitted by NoelKev 1 hour ago
This study utilizes a natural experiment–conditionally random dormitory assignments of first-year US college students–to investigate the influence of obesogenic environmental factors in explaining changes in weight and exercise behavior during the 2009 to 2010 academic year. The design addres...
submitted by TerranTri 1 hour ago
Water-protein interactions help to maintain flexible conformation conditions which are required for multifunctional protein recognition processes. The intimate relationship between the protein surface and hydration water can be analyzed by studying experimental water properties measured in protei...
submitted by DalDenn 1 hour ago
The present study deals with the cytological investigations on the meristematic root cells of carnation (Dianthus caryophyllus Linn.) grown in vivo and in vitro. Cellular parameters including the mitotic index (MI), chromosome count, ploidy level (nuclear DNA content), mean cell and nuclear areas...
submitted by gseikmon 1 hour ago
Two major categories of factors are predicted to influence behaviour in dyadic contests; differences in the abilities of the contestants to acquire and retain resources (resource holding potential), and the value of the contested resource (resource value, RV; which comprises objective and subject...
submitted by CoreColton 1 hour ago
Recent studies suggest that facial attractiveness indicates immune responsiveness in men and that this relationship is moderated by stress hormones which interact with testosterone levels. However, studies testing whether facial attractiveness in women signals their immune responsiveness are lack...
submitted by jomobags466 1 hour ago
Bird song is hypothesized to be a reliable indicator of cognition because it depends on brain structure and function. Song features have been found to correlate positively with measures of cognition, but the relationship between song and cognition is complicated because not all cognitive abilitie...
submitted by majtobo 1 hour ago
The New Zealand bigeye, Pempheris adspersa, is a nocturnal planktivore and has recently been found to be an active sound producer. The rostral end of the swim bladder lies adjacent to Baudelot's ligament which spans between the bulla and the cleithrum bone of the pectoral girdle. The aim of this ...
submitted by qualitybm 1 hour ago
The structure of a complex containing a toxin bound to a potassium ion channel has been solved for the first time, revealing how scorpions have designed toxins that can recognize and target the filter that controls the movement of potassium ions through these channels.
submitted by poloetat 2 hours ago
Chemokine receptors, which belong to the G protein-coupled receptor (GPCR) family of proteins, are critical regulators of cell migration in the context of immune surveillance, inflammation, and development. Recently determined structures of chemokine receptor CXCR4 reveal unique structural featur...
submitted by AbrahamJay 2 hours ago
Four different molecular weight sulfated polysaccharides (UFP1, UFP2, UFP3 and UFP4) were extracted and separated from Ulva fasciata by hot water extraction and ultrafiltration. Their chemical and physical characteristics were determined and antioxidant activities were investigated on the basis o...
submitted by chenane 2 hours ago
In this research work, dextran was extracted from deteriorated sugarcane by alcohol precipitation and purified by gel filtration chromatography. Total acid hydrolysis and enzymatic degradation were utilized to confirm the purity of separated polysaccharide. Using the more recently available techn...
submitted by pioci 3 hours ago
Here we present and describe comparatively 25 talus bones from the Middle Pleistocene site of the Sima de los Huesos (SH) (Sierra de Atapuerca, Burgos, Spain). These tali belong to 14 individuals (11 adult and three immature). Although variation among Middle and Late Pleistocene tali tends to be ...
submitted by swopnelorvi 3 hours ago
Resolution of acute inflammation is an active process that requires inhibition of further leukocyte recruitment and removal of leukocytes from inflamed sites. Emigrated neutrophils undergo apoptosis before being removed by scavenger macrophages. Recent studies using a variety of gene knockout, tr...
submitted by AmareJaxo 3 hours ago
Branching models have a long history of biological applications, particularly in population dynamics. In this work, our interest is the development of mathematical models to describe the demographic dynamics of socially structured animal populations, focusing our attention on lineages, usually ma...