Sentences with phrase «together by membranes»

All living cells are held together by membranes, which provide a barrier to the transport of nutrients.

Not exact matches

Molecular biology, contrary to the article, does not support evolution by natural chance because evolution can not occur without inheritance, inheritance can not occur without DNA and DNA is so complex it could not have evolved by chance unless we are to assume that molecules just happened to arrange themselves into the DNA molecule at the same times as a nucleus formed to hold the DNA, at the same time as the cell membrane just happened to form around it, at the sametime as all the cell maintaining process in the cytoplasm just happened to come into existence to form a single cell and that all these aspects just happened to come together and work harmoniously.

My partner and midwife took the babies to be weighed and measured as our OB helped me to birth both placentas, which were intact and, interestingly, fused together by their outer membranes.

By pressurizing the gas above this membrane, the researchers are able to gently massage the liquid droplet to ensure its contents are fully mixed together.

There are two - dimensional polymer - like assemblies that occur naturally, such as in cell membranes, where large molecules line up parallel to each other and are held together in a layer by electrostatic attraction.

Work by Scheller, Jahn, John Heuser (Washington University School of Medicine, St. Louis), and others advanced the concept that VAMP / synaptobrevin and syntaxin form coils that wrap around each other along their lengths, thus drawing together the membranes in which they're embedded.

In a European collaboration (NANOQUESTFIT) together with partners around Professor Ori Cheshnovsky at Tel Aviv University (where all nanomasks were written), as well as with support by groups in Jena (growth of biphenyl membranes, Prof. Turchanin), and Vienna (High - Resolution Electron Microscopy, Prof. Meyer) they now demonstrated for the first time that such gratings can be fabricated even from the thinnest conceivable membranes.

For example, KBs were recently reported to act as neuroprotective agents by raising ATP levels and reducing the production of reactive oxygen species in neurological tissues, 80 together with increased mitochondrial biogenesis, which may help to enhance the regulation of synaptic function.80 Moreover, the increased synthesis of polyunsaturated fatty acids stimulated by a KD may have a role in the regulation of neuronal membrane excitability: it has been demonstrated, for example, that polyunsaturated fatty acids modulate the excitability of neurons by blocking voltage-gated sodium channels.81 Another possibility is that by reducing glucose metabolism, ketogenic diets may activate anticonvulsant mechanisms, as has been reported in a rat model.82 In addition, caloric restriction per se has been suggested to exert neuroprotective effects, including improved mitochondrial function, decreased oxidative stress and apoptosis, and inhibition of proinflammatory mediators, such as the cytokines tumour necrosis factor - α and interleukins.83 Although promising data have been collected (see below), at the present time the real clinical benefits of ketogenic diets in most neurological diseases remain largely speculative and uncertain, with the significant exception of its use in the treatment of convulsion diseases.

Garner formulates an amalgamation of materials, such as beads, crystals, silicone, rubber, teeth, condoms, teddy bear stuffing and petroleum jelly, held together by glass walls or latex membranes, to suggest viscera.

It comprised 3 steel rings joined together by a single span of PVC membrane.

Past works in the series have included Olafur Eliasson's The Weather Project, consisting of a giant simulated sun, Anish Kapoor's Marsyas, a set of steel rings joined together by bright red PVC membrane, and Carsten Holler's popular Test Site, which was made up of giant metal slides.

They were layered on top of one another, membrane upon membrane separated by a thin film of liquid, almost like a stack of pancakes held together with maple syrup.