The observations to be presented here on the average oxygen pressure gradient that exists between the maternal and fetal bloods of the sheep, separated by the five tissue layers that form the syndesmochorial placenta, are in the nature of a supplement to data published earlier.' In that paper data were presented on the form of the oxygen dissociation curves of fetal and maternal bloods obtained...

pollution arising from plastic waste materials caused a great worry for researchers who are interested in protection of environment. this problem shifts their subject to bio-polymers for applications in packaging industries. however, their low water barrier properties are a critical problem. the effects of citric acid and methyl cellulose on water vapor and oxygen permeabilities and mechanical ...

Oxygen dissociation curves of maternal and fetal bloods prepared in vitro have been described in several species including the goat.' The use of recent polarographic methods for measuring oxygen tension in blood avoids any possible alteration in oxygen affinity of the blood during equilibration in tonometers and could theoretically result in more accurate maternal and fetal oxygen dissociation ...

The interaction of salicylate with the respiratory chain of liver mitochondria generates hydrogen peroxide and, most probably, other reactive oxygen species, which in turn oxidize thiol groups and glutathione. This oxidative stress, confirmed by the prevention of action by antioxidant agents, leads to the induction of the mitochondrial permeability transition in the presence of Ca2+. This pheno...

The capability of Yersinia ruckeri to survive in the aquatic systems reflects its adaptation (most importantly through the alteration of membrane permeability) to the unfavorable environments. The nonspecific porins are a key factor contributing to the permeability. Here we studied the influence of the stimuli, such as temperature, osmolarity, and oxygen availability on regulation of Y. ruckeri...

BACKGROUND Atelectasis results in impaired compliance and gas exchange and, in extreme cases, increased microvascular permeability, pulmonary hypertension, and right ventricular dysfunction. It is not known whether such atelectasis-induced lung injury is due to the direct mechanical effects of lung volume reduction and alveolar collapse or due to the associated regional lung hypoxia. The author...

The packaging industry requires permeable materials capable of offering freshness the content. use fillers can enhance these properties to polymeric material. This work investigates effect incorporating different (organophilic clay and corn straw) on rheological, mechanical, permeability, water absorption biodegradability characteristics poly (butylene adipate co-terephthalate) (PBAT) processed...

Carbon neutrality refers to the state of making net‐zero emissions carbon dioxide (CO 2 ), which is a key concept in tackling global warming. It can be achieved by offsetting as well balancing reduced and emitted emissions. Globally, CO mainly from fossil fuel power plants. The use capture storage technology, including pre‐, post‐, oxy‐fuel combustion capture, plants provide carbon‐neutral stra...

Environmental stress, such as oxygen deprivation, affects various cellular activities and developmental processes. In this study, we directly investigated Drosophila embryo development in vivo while cultured on a microfluidic device, which imposed an oxygen gradient on the developing embryos. The designed microfluidic device enabled both temporal and spatial control of the local oxygen gradient...