Toplam 85 içerik listeleniyor
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Cecropia Güve Yaşam Döngüsü
Cecropia Güve Yaşam Döngüsü Meditate and wonder; Experience the marvel of a complete metamorphosis while listening to sumptuous music of Debussy and Holst. Witness events common to nature but rarely seen. Cecropia moth lifecycle metamorphosis is chronicled in detail. See a caterpillar eat its way out of the egg. Look as a larva changes from black; then yellow; to showing patterns and hues of orange, black, yellow, blue and green. Watch the caterpillar work out of its old 4rth instar...
https://www.biyologlar.com/cecropia-guve-yasam-dongusu -
Scientists discover an on-off switch for aging cells
Scientists at the Salk Institute have discovered an on-and-off "switch" in cells that may hold the key to healthy aging. This switch points to a way to encourage healthy cells to keep dividing and generating, for example, new lung or liver tissue, even in old age. In our bodies, newly divided cells constantly replenish lungs, skin, liver and other organs. However, most human cells cannot divide indefinitely–with each division, a cellular timekeeper at the ends of chromosomes shortens. When...
https://www.biyologlar.com/scientists-discover-an-on-off-switch-for-aging-cells -
Using DNA origami to build nanodevices of the future
Scientists have been studying ways to use synthetic DNA as a building block for smaller and faster devices. DNA has the advantage of being inherently "coded". Each DNA strand is formed of one of four "codes" that can link to only one complementary code each, thus binding two DNA strands together. Scientists are using this inherent coding to manipulate and "fold" DNA to form "origami nanostructures": extremely small two- and three-dimensional shapes that can then be used as construction material...
https://www.biyologlar.com/using-dna-origami-to-build-nanodevices-of-the-future -
Using DNA origami to build nanodevices of the future
Scientists have been studying ways to use synthetic DNA as a building block for smaller and faster devices. DNA has the advantage of being inherently "coded". Each DNA strand is formed of one of four "codes" that can link to only one complementary code each, thus binding two DNA strands together. Scientists are using this inherent coding to manipulate and "fold" DNA to form "origami nanostructures": extremely small two- and three-dimensional shapes that can then be used as construction material...
https://www.biyologlar.com/using-dna-origami-to-build-nanodevices-of-the-future -
Broad, MIT scientists overcome key CRISPR-Cas9 genome editing hurdle
Researchers at the Broad Institute of MIT and Harvard and the McGovern Institute for Brain Research at MIT have engineered changes to the revolutionary CRISPR-Cas9 genome editing system that significantly cut down on "off-target" editing errors. The refined technique addresses one of the major technical issues in the use of genome editing. The CRISPR-Cas9 system works by making a precisely targeted modification in a cell's DNA. The protein Cas9 alters the DNA at a location that is specified by...
https://www.biyologlar.com/broad-mit-scientists-overcome-key-crispr-cas9-genome-editing-hurdle -
Great Barrier Reef marine reserves combat coral disease
A new and significant role for marine reserves on the Great Barrier Reef has been revealed, with researchers finding the reserves reduce the prevalence of coral diseases. It's been known for some time that marine reserves are important for maintaining and enhancing fish stocks, but this is the first time marine reserves have been shown to enhance coral health on the Great Barrier Reef. Researchers from the ARC Centre of Excellence for Coral Reef Studies at James Cook University found that...
https://www.biyologlar.com/great-barrier-reef-marine-reserves-combat-coral-disease -
Zehirli Bitkiler
Tarihin ilk çağlarından günümüze kadar insanlar bitkilerden besinlerini sağlamış ve şifa aramışlardır ve beslenmelerinin yanında önemli hastalıklarını da şifalı bitkilerle tedavi edebilmişlerdir. Ancak her bitkinin düşüldüğü kadar yararlı olmadığı ya da yararlı etkilerinin yanında zararlı olabilen başka etkilerinin de olduğu görülmüştür. Günümüzde de devam eden her ottan şifa arama geleneği özellikle kırsal yörelerde birçok kaza...
https://www.biyologlar.com/zehirli-bitkiler -
Researchers use single molecule of DNA to create world's smallest diode
Researchers at the University of Georgia and at Ben-Gurion University in Israel have demonstrated for the first time that nanoscale electronic components can be made from single DNA molecules. Their study, published in the journal Nature Chemistry, represents a promising advance in the search for a replacement for the silicon chip. The finding may eventually lead to smaller, more powerful and more advanced electronic devices, according to the study's lead author, Bingqian Xu. "For 50 years,...
https://www.biyologlar.com/researchers-use-single-molecule-of-dna-to-create-worlds-smallest-diode -
Researchers use single molecule of DNA to create world's smallest diode
Researchers at the University of Georgia and at Ben-Gurion University in Israel have demonstrated for the first time that nanoscale electronic components can be made from single DNA molecules. Their study, published in the journal Nature Chemistry, represents a promising advance in the search for a replacement for the silicon chip. The finding may eventually lead to smaller, more powerful and more advanced electronic devices, according to the study's lead author, Bingqian Xu. "For 50 years,...
https://www.biyologlar.com/researchers-use-single-molecule-of-dna-to-create-worlds-smallest-diode -
Algae use their 'tails' to gallop and trot like quadrupeds
Long before there were fish swimming in the oceans, tiny microorganisms were using long slender appendages called cilia and flagella to navigate their watery habitats.
https://www.biyologlar.com/algae-use-their-tails-to-gallop-and-trot-like-quadrupeds -
These gigantic whales have nerves like bungee cords
Nerves aren't known for being stretchy. In fact, "nerve stretch injury" is a common form of trauma in humans. But researchers reporting in
https://www.biyologlar.com/these-gigantic-whales-have-nerves-like-bungee-cords -
Penn bioengineers show why lab-made stem cells might fail: Errors in DNA folding
Induced pluripotent stem cells hold promise for regenerative medicine because they can, in theory, turn into any type of tissue and because they are made from a patient's own adult cells, guaranteeing compatibility. However, the technique that turns adult cells into these iPS cells is not foolproof; after reverting to their pluripotent state, these cells don't always correctly differentiate back into adult cells. Researchers from the University of Pennsylvania have now discovered one of the...
https://www.biyologlar.com/penn-bioengineers-show-why-lab-made-stem-cells-might-fail-errors-in-dna-folding -
Gene fuels age-related obesity and diabetes
Practically everyone gets fatter as they get older, but some people can blame their genes for the extra padding. Researchers have shown that two different mutations in a gene called ankyrin-B cause cells to suck up glucose faster than normal, fattening them up and eventually triggering the type of diabetes linked to obesity. The more severe of the two mutations, called R1788W, is carried by nearly one million Americans. The milder mutation, known as L1622I, is shared by seven percent of the...
https://www.biyologlar.com/gene-fuels-age-related-obesity-and-diabetes -
Tiny genetic tweak unlocked corn kernels during domestication
If not for a single genetic mutation, each kernel on a juicy corn cob would be trapped inside a inedible casing as tough as a walnut shell. The mutation switches one amino acid for another at a specific position in a protein regulating formation of these shells in modern corn's wild ancestor, according to a study published in the July 2015 issue of GENETICS, a publication of the Genetics Society of America. "Humans completely reshaped the ancestor of corn, effectively turning the cob inside...
https://www.biyologlar.com/tiny-genetic-tweak-unlocked-corn-kernels-during-domestication -
Embryonic gene Nanog reverses aging in adult stem cells
The images above show, from left to right, functioning stem cells, stem cells no longer functioning due to Hutchinson-Gilford Progeria syndrome (HGPS), and stem cells previously not functioning
https://www.biyologlar.com/embryonic-gene-nanog-reverses-aging-in-adult-stem-cells -
Embryonic gene Nanog reverses aging in adult stem cells
The images above show, from left to right, functioning stem cells, stem cells no longer functioning due to Hutchinson-Gilford Progeria syndrome (HGPS), and stem cells previously not functioning
https://www.biyologlar.com/embryonic-gene-nanog-reverses-aging-in-adult-stem-cells -
Uncovering the secrets of immune system invaders
The human immune system is a powerful and wonderful creation. If you cut your skin, your body mobilizes a series of different proteins and cells to heal the cut. If you are infected by a virus or bacteria, your immune system responds with a series of cells that attack the invader and neutralize it. But sometimes invaders find ways to exploit the very cells that are designed to protect us. Tuberculosis (Mycobacterium tuberculosis) and its lesser-known (and less virulent) relative Mycobacterium...
https://www.biyologlar.com/uncovering-the-secrets-of-immune-system-invaders -
Legions of nanorobots target cancerous tumors with precision
The legions of nanorobotic agents are actually composed of more than 100 million flagellated bacteria
https://www.biyologlar.com/legions-of-nanorobots-target-cancerous-tumors-with-precision -
Legions of nanorobots target cancerous tumors with precision
The legions of nanorobotic agents are actually composed of more than 100 million flagellated bacteria
https://www.biyologlar.com/legions-of-nanorobots-target-cancerous-tumors-with-precision -
New mechanisms of self-organization in living cells
Chromosome is a structure inside the cell nucleus that carries a large part of the genetic information and is responsible for its storage, transfer and implementation. Chromosome is formed from a very long DNA molecule - a double chain of a plurality of genes. Given that the diameter of the cell nucleus is usually around hundredth of a millimeter or even less, while the total length of DNA constituting human genome is about two meters, it is clear that DNA must be packaged very...
https://www.biyologlar.com/new-mechanisms-of-self-organization-in-living-cells -
Scientists solve mystery behind earthworm digestion
Scientists have discovered how earthworms can digest plant material, such as fallen leaves, that would defeat most other herbivores. Earthworms are responsible for returning the carbon locked inside dead plant material back into the ground. They drag fallen leaves and other plant material down from the surface and eat them, enriching the soil, and they do this in spite of toxic chemicals produced by plants to deter herbivores. The scientists, led by Dr Jake Bundy and Dr Manuel Liebeke from...
https://www.biyologlar.com/scientists-solve-mystery-behind-earthworm-digestion -
Nematode inside nematode
An Antarctic nematode developing within another nematode.
https://www.biyologlar.com/nematode-inside-nematode -
How your cells build tiny 'train tracks' could shed light on human disease
Researchers from the University of Warwick have discovered how cells in the human body build their own 'railway networks', throwing light on how diseases such as bowel cancer work. The results have just been published in Nature Scientific Reports. Professor Rob Cross, Professor of Mechanochemical Cell Biology at Warwick Medical School, said: "Every cell in our bodies contains a railway network, a system of tiny tracks called microtubules that run between important destinations inside the cell...
https://www.biyologlar.com/how-your-cells-build-tiny-train-tracks-could-shed-light-on-human-disease -
Large funnel-web spider find surprises scientists
Scientists studying funnel-web spiders at Booderee National Park near Jervis Bay on the New South Wales south coast have found a large example of an unexpected funnel-web species. The scientists believe the 50-millimetre spider is a species of the tree-dwelling genus Hadronyche, not the ground-dwelling genus Atrax, which includes the Sydney funnel-web, the only species reported in the Park's records. "It's remarkable that we have found this other species in Booderee National Park," said Dr...
https://www.biyologlar.com/large-funnel-web-spider-find-surprises-scientists -
3-D motion of cold virus offers hope for improved drugs using Australia's fastest supercomputer
Melbourne researchers are now simulating in 3D, the motion of the complete human rhinovirus, the most frequent cause of the common cold, on Australia's fastest supercomputer, paving the way for new drug development. Rhinovirus infection is linked to about 70 per cent of all asthma exacerbations with more than 50 per cent of these patients requiring hospitalisation. Furthermore, over 35 per cent of patients with acute chronic obstructive pulmonary disease (COPD) are hospitalised each year due...
https://www.biyologlar.com/3-d-motion-of-cold-virus-offers-hope-for-improved-drugs-using-australias-fastest-supercomputer -
New insights into a virus proteome
The genome encodes the complete information needed by an organism, including that required for protein production. Viruses, which are up to a thousand times smaller than human cells, have considerably smaller genomes. Using a type of herpesvirus as a model system, the scientists of the Max Planck Institute of Biochemistry in Martinsried near Munich and their collaboration partners at the University of California in San Francisco have shown that the genome of this virus contains much more...
https://www.biyologlar.com/new-insights-into-a-virus-proteome -
Bacterial DNA may integrate into human genome more readily in tumor tissue
Bacterial DNA may integrate into the human genome more readily in tumors than in normal human tissue, scientists have found. The researchers, affiliated with the University of Maryland School of Medicine's Institute for Genome Sciences, analyzed genomic sequencing data available from the Human Genome Project, the 1,000 Genomes Project and The Cancer Genome Atlas. They considered the phenomenon of lateral gene transfer (LGT), the transmission of genetic material between organisms in a manner...
https://www.biyologlar.com/bacterial-dna-may-integrate-into-human-genome-more-readily-in-tumor-tissue -
Heme, a poisonous nutrient, tracked by 'Green Lantern' sensor
Tailor-made ratiometric sensors make baker's yeast cells light up green, as Georgia Tech scientists use it to track the movements of the essential toxin heme
https://www.biyologlar.com/heme-a-poisonous-nutrient-tracked-by-green-lantern-sensor -
Heme, a poisonous nutrient, tracked by 'Green Lantern' sensor
Tailor-made ratiometric sensors make baker's yeast cells light up green, as Georgia Tech scientists use it to track the movements of the essential toxin heme
https://www.biyologlar.com/heme-a-poisonous-nutrient-tracked-by-green-lantern-sensor -
Relaxation helps pack DNA into a virus
Researchers at the University of California, San Diego have found that DNA packs more easily into the tight confines of a virus when given a chance to relax, they report in a pair of papers to be published in in the early edition of the Proceedings of the National Academy of Sciences the week of May 26 and the May 30 issue of Physical Review Letters. DNA is a long, unwieldy molecule that tends to repel itself because it is negatively charged, yet it can spool tightly. Within the heads of...
https://www.biyologlar.com/relaxation-helps-pack-dna-into-a-virus -
Too much of a good thing: Extra genes make bacteria lethal
We, as most animals, host many different beneficial bacteria. Being beneficial to the host often pays off for the bacteria, as success of the host determines the survival and spread of the microbe. But if bacteria grow too much they may become deadly. In a new study published in the latest edition of the scientific journal PLOS Biology*, a research team from Instituto Gulbenkian de Ciencia (IGC; Portugal) found that a single genomic change can turn beneficial bacteria into pathogenic bacteria,...
https://www.biyologlar.com/too-much-of-a-good-thing-extra-genes-make-bacteria-lethal -
The 'intraterrestrials': New viruses discovered in ocean depths
The intraterrestrials, they might be called. Strange creatures live in the deep sea, but few are odder than the viruses that inhabit deep ocean methane seeps and prey on single-celled microorganisms called archaea. The least understood of life's three primary domains, archaea thrive in the most extreme environments on the planet: near hot ocean rift vents, in acid mine drainage, in the saltiest of evaporation ponds and in petroleum deposits deep underground. Virus in the deep blue sea While...
https://www.biyologlar.com/the-intraterrestrials-new-viruses-discovered-in-ocean-depths -
Ancient algae found deep in tropical glacier
The remains of tiny creatures found deep inside a mountaintop glacier in Peru are clues to the local landscape more than a millennium ago, according to a new study by Rice University, the University of Nebraska-Lincoln and Ohio State University. The unexpected discovery of diatoms, a type of algae, in ice cores pulled from the Quelccaya Summit Dome Glacier demonstrate that freshwater lakes or wetlands that currently exist at high elevations on or near the mountain were also there in earlier...
https://www.biyologlar.com/ancient-algae-found-deep-in-tropical-glacier -
Cell death: How a protein drives immune cells to suicide
The best hiding place often lies behind enemy lines, as many bacteria such as the pathogens responsible for tuberculosis or typhoid have realized. They invade immune cells and can survive there, well hidden, for some time. To eliminate such invaders, the host macrophages can initiate a suicide program. Together with researchers at the Novartis Institute for Biomedical Research and ETH Zurich, the team led by Prof. Sebastian Hiller from the Biozentrum at the University of Basel has shown for the...
https://www.biyologlar.com/cell-death-how-a-protein-drives-immune-cells-to-suicide -
Cell death: How a protein drives immune cells to suicide
The best hiding place often lies behind enemy lines, as many bacteria such as the pathogens responsible for tuberculosis or typhoid have realized. They invade immune cells and can survive there, well hidden, for some time. To eliminate such invaders, the host macrophages can initiate a suicide program. Together with researchers at the Novartis Institute for Biomedical Research and ETH Zurich, the team led by Prof. Sebastian Hiller from the Biozentrum at the University of Basel has shown for the...
https://www.biyologlar.com/cell-death-how-a-protein-drives-immune-cells-to-suicide -
Coral 'toolkit' allows floating larvae to transform into reef skeletons
In a study published today, researchers from the University of Hawai'i at Mānoa (UHM), Rutgers University,
https://www.biyologlar.com/coral-toolkit-allows-floating-larvae-to-transform-into-reef-skeletons -
The first long-horned beetle giving birth to live young discovered in Borneo
A remarkably high diversity of the wingless long-horned beetles in the mountains of northern Borneo is reported by three Czech researchers from the Palacký University, Olomouc, Czech Republic. Apart from the genera and species new to science, the entomologists report the first case of reproduction by live birth in this rarely collected group of beetles. Generally, insects are oviparous, which means that their females lay eggs and the embryonic development occurs outside the female's body. On...
https://www.biyologlar.com/the-first-long-horned-beetle-giving-birth-to-live-young-discovered-in-borneo -
The first long-horned beetle giving birth to live young discovered in Borneo
A remarkably high diversity of the wingless long-horned beetles in the mountains of northern Borneo is reported by three Czech researchers from the Palacký University, Olomouc, Czech Republic. Apart from the genera and species new to science, the entomologists report the first case of reproduction by live birth in this rarely collected group of beetles. Generally, insects are oviparous, which means that their females lay eggs and the embryonic development occurs outside the female's body. On...
https://www.biyologlar.com/the-first-long-horned-beetle-giving-birth-to-live-young-discovered-in-borneo -
Deep-sea bacteria could help neutralize greenhouse gas, researchers find
A type of bacteria plucked from the bottom of the ocean could be put to work neutralizing large amounts of industrial carbon dioxide in the Earth's atmosphere, a group of University of Florida researchers has found. Carbon dioxide, a major contributor to the buildup of atmospheric greenhouse gases, can be captured and neutralized in a process known as sequestration. Most atmospheric carbon dioxide is produced from fossil fuel combustion, a waste known as flue gas. But converting the carbon...
https://www.biyologlar.com/deep-sea-bacteria-could-help-neutralize-greenhouse-gas-researchers-find -
Protein structure paves the way for new broad spectrum antifungals
This ribbon diagram shows two views of the structure of the enzyme Tps2 as it removes a phosphate from a sugar molecule (yellow, orange and red).
https://www.biyologlar.com/protein-structure-paves-the-way-for-new-broad-spectrum-antifungals -
Nobel laureate, new technologies show how cancer cells protect chromosomes from decay
Protective telomeres are augmented by freely diffusing telomerase.
https://www.biyologlar.com/nobel-laureate-new-technologies-show-how-cancer-cells-protect-chromosomes-from-decay -
Nobel laureate, new technologies show how cancer cells protect chromosomes from decay
Protective telomeres are augmented by freely diffusing telomerase.
https://www.biyologlar.com/nobel-laureate-new-technologies-show-how-cancer-cells-protect-chromosomes-from-decay -
Fiddler crabs' 'Morse code' attracts Mrs. Right
This is the male fiddler crab Uca lactea.
https://www.biyologlar.com/fiddler-crabs-morse-code-attracts-mrs-right -
Fiddler crabs' 'Morse code' attracts Mrs. Right
This is the male fiddler crab Uca lactea.
https://www.biyologlar.com/fiddler-crabs-morse-code-attracts-mrs-right -
The mysterious sexual life of the most primitive dragonfly
Hemiphlebia mirabilis is a rare species in every sense: it is the most primitive dragonfly known to man, it has unique reproductive behaviors and was believed to be extinct.
https://www.biyologlar.com/the-mysterious-sexual-life-of-the-most-primitive-dragonfly -
The mysterious sexual life of the most primitive dragonfly
Hemiphlebia mirabilis is a rare species in every sense: it is the most primitive dragonfly known to man, it has unique reproductive behaviors and was believed to be extinct.
https://www.biyologlar.com/the-mysterious-sexual-life-of-the-most-primitive-dragonfly -
How a cold gets into cells
Cold viruses cause us irritation by penetrating into our cells and transporting their RNA into the cytoplasma of the infected cells. This is the only way they can multiply.
https://www.biyologlar.com/how-a-cold-gets-into-cells -
New clues found to how 'cruise-ship' virus gets inside cells
Researchers at Washington University School of Medicine in St. Louis have identified the protein that norovirus -- shown here in a colored transmission electron micrograph -- uses to invade cells
https://www.biyologlar.com/new-clues-found-to-how-cruise-ship-virus-gets-inside-cells -
New genus of bacteria found living inside hydraulic fracturing wells
Ohio State University researchers and their colleagues have identified a new genus of bacteria living inside hydraulic fracturing wells.
https://www.biyologlar.com/new-genus-of-bacteria-found-living-inside-hydraulic-fracturing-wells -
New genus of bacteria found living inside hydraulic fracturing wells
Ohio State University researchers and their colleagues have identified a new genus of bacteria living inside hydraulic fracturing wells.
https://www.biyologlar.com/new-genus-of-bacteria-found-living-inside-hydraulic-fracturing-wells