Sentences with phrase «nesting cell structure»

17 September — 22 October 2009 The Scottish enlightenment scientist Lord Kelvin asked the question about how space could be most efficiently bounded by an enclosing geometry the answer being found in those most elusive and fugitive of things: bubbles and foams which forms nesting cell structure of polyhedra.

Not exact matches

«We have 47 teams now, which is quite a few, so we're look at creating groups of teams, or cells, not a monolithic structure.

In the clearest possible case, the ANT - OAR cell would differ from a zygote on all of the parameters noted above: The ANT - OAR cell would have a pattern of gene expression that is clearly distinct from a zygote; it would generate a homogeneous population of cells rather than multiple cell types; it would undergo simple cleavage divisions and not produce any multicellular structures.

It is the DNA located in biological structures called mitochondria, not the DNA contained within the cell nucleus which we normally think of when we refer to «my DNA».

So of course the real problem of life is not that all the structures and molecules in the cell appear to comply with the known laws of physics and chemistry.

Birch and Cobb maintain that the ecological model is more adequate than the mechanical model for explaining DNA, the cell, other biological subject matter (as well as subatomic physics), because it holds that living things behave as they do only in interaction with other things which constitute their environment (LL 83) and because «the constituent elements of the structure at each level (of an organism) operate in patterns of interconnectedness which are not mechanical» (LL 83).

It is these events, and not the molecular structure of the cell, that account for the life of the cell.

I like to let my breads rise slowly, and for as long as possible before baking because it helps with cell structure, but I can't say I ever have the patience to wait that long!

Just as the structure of our cells doesn't change with our diet, the milk our bodies produce doesn't change depending on our nutrition.

«While environmental enrichment didn't seem to significantly influence the number of neurons [that were damaged],» explains Tsai, «it does induce the growth of dendrites and high numbers of synapses,» both of which are neuronal structures that underlie how brain cells communicate with one another.

Solar cells don't just cover the tops of the wings — they're an integral part of the structure.

So far, gene therapy attempts have only resulted in partial improvements of hearing in mouse models of specific human deafness forms that did not include severe anomalies in hair cell structure.

However, lipid compositions vary between cells and cellular structures within the same organism, so diet isn't the only factor determining which lipids are manufactured.

The protein that copies viral RNA is polymerase protein L, which conducts all the enzymatic activities needed to synthesize RNA and then add a cap structure to its end to ensure it doesn't get destroyed by the cell — and to ensure that it can be translated into protein.

Scientists we sent Anand's poster presentation to said that although the team has indeed grown some kind of miniature collection of cells, or «organoid», in a dish, the structure isn't much like a fetal brain.

Now they report recovering not just collagen — which conveys little evolutionary information because it is the same in almost all animals — but also haemoglobin, elastin and laminin, as well as cell - like structures resembling blood and bone cells.

However, there doesn't seem to be any such surface structure on the cells of vertebrates.

Even though the chemical structure of auxin was identified as early as in the 1930s, it is still not completely resolved how the hormone gets to its target cells and unfolds its effect there.

There are details of the structure of the living cell, essential features in the composition of metals, cotton, silk, rubber, paint, bone, nerve, and a thousand other things which are hidden even from the microscope, and must always remain so hidden because the failure does not lie with the skill of the optician but with the incapacity of light itself.

«Even something as seemingly simple as red blood cells that don't have a nucleus evolved a structure and a function that is much more complicated than we can perceive by looking under the microscope,» says Jason Acker, associate director of development for Canadian Blood Services.

Not only did they show that N - cadherin was necessary for creating the perfectly clear structure of the lens, they also observed that malformed lenses lacking N - cadherin began to attract immune cells to try to fix the damage.

A physician and cell biologist who won a 1972 Nobel Prize for his work describing the structure of antibodies, Edelman is now obsessed with the enigma of human consciousness — except that he does not see it as an enigma.

Otherwise «you can't grow them very large and you will be hampered in trying to get the organoid to develop more mature cell types and structures.»

Matteo Boretto, the first author on this study, commented that «we were very excited to see that we could not only robustly grow and amplify endometrial tissue in a dish, but that the tiny structures were also able to reproduce normal responses of the endometrium to hormones: oestrogen makes the tissue thicken, progesterone then induces maturation including folding (see picture), and subsequent removal of both hormones mimics the cell shedding of the menstrual period.»

But it seemed unlikely, because the body coverings were thought to grow differently: Feathers and hair develop from specialized plates of thickened ectoderm — an embryonic cell layer — called anatomical placodes, structures not seen in reptiles.

Plakoglobin is a component of two important structures involved in cell - to - cell adhesion, and the investigators found that suppressing its expression caused CTC clusters to fall apart, reducing their metastatic potential, and also disrupted cell - to - cell contact between breast cancer cells but not normal breast tissue.

«Looking at live cell membranes is almost impossible, because the cell membrane is not a simple structure; there are a lot of glycoproteins as well as the extracellular matrix,» explains Sang - Joon Cho, chief scientist and director of R&D at Park Systems in Suwon, Korea.

AFM didn't catch the details of microvilli and other structures on the cell surface.

«The biological context of these cells modifies not only their behaviour but also their internal structure,» comments Casanova.

In further tests, he and his colleagues designed a mutated version of the botulism compound, based on the novel crystal structure, in which HA would not bind with the epithelial cell protein E-cadherin.

The different types of cells made the structures as they do in nature — for example, distal cells made distal tubules, a segment of the nephron that filters urine — but they didn't communicate.

The lipid type, ceramide, also has a functional role in various signaling pathways and affects synaptic function, although its primary role is not in the synapse, but providing structure in cell membranes.

While researchers at the Georgia Institute of Technology don't have a specific application for the doughnut - shaped droplets yet, they believe the novel structures offer opportunities to study many interesting problems, from looking at the properties of ordered materials within these confined spaces to studying how geometry affects how cells behave.

For this study, researchers studied four solar cells with different selenium contents — and corresponding changes in crystal structure — and learned that the one with the highest level of selenium did not perform well.

In a report published in Development, they describe early abnormalities in the way Huntington's neurons look, and how these cells form larger structures that had not previously been associated with the disease.

One innovation that Post hadn't described earlier is a circular structure in the middle of the petri dish around which the cells grow.

There is no reason why even higher efficiencies could not be reached using n - type silicon or more advanced cell structures,» Professor Savin predicts.

«We don't know for certain if the damage is irreversible, but I expect so, because the cells that hold the internal structure in place have been infected and destroyed,» said Diamond, who is also a professor of pathology and immunology, and of molecular microbiology.

Fritz - Laylin will not only clock the speed of the cell (which can be done with lower resolution techniques); she'll look at the way the cell deforms itself as it moves as well as how the flow of its internal structures contributes to the movement.

These cells normally don't mingle with neurons from the diencephalon, which gives rise to less advanced structures such as the hypothalamus and optic nerves.

When for the protein does not bind properly to the microtubules that form the cell's structure, it has a tendency to clump together, she explained, forming insoluble fibers in the neuron.

Investigations into human brain development using human cells in the culture dish have so far been very limited: the cells in the dish grow flat, so they do not display any three - dimensional structure.

Lucia and John both agree that bacteria can not build up a resistance to silver nanoparticles as they can to antibiotics, because of the way the it attacks — destroying the physical structure of the cells, which kills them.

Even though cells are not threatened by hurricanes and earthquakes, the damage induced by heat or radiation is equally devastating: Important proteins that control chemical reactions, transport substances or recognize signal substances, among others, lose their structure and are rendered useless.

The renowned embryologist charted the intricate architecture of the developing nervous system, proving that its final structure is shaped not just by newborn cells but also by those that eventually die.

Scientists do not yet fully understand how antibiotics work on the molecular level, but they think that the drugs are effective in part by introducing reactive oxygen to bacterial cells, which damages key cellular structures.

If we can show that this anomaly doesn't occur in healthy cells, we will be able to think about exploring these structures as possible therapeutic targets.»

For example, part of a description of a method for karyotyping — examining the number and structure of chromosomes in a cell — was not only copied from a paper published by a separate group, but was also not consistent with the procedure actually followed by Obokata's team.

These small RNA molecules must be trimmed from long hairpin - loop structures, raising a question: How do cells know which RNA loops need to be processed this way and which don't?

The key lies in double - stranded RNAs, a type of structure not normally found in a healthy cell.