Toplam 47 içerik listeleniyor
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UW team stores digital images in DNA -- and retrieves them perfectly
Technology companies routinely build sprawling data centers to store all the baby pictures, financial transactions, funny cat videos and email messages its users hoard. But a new technique developed by University of Washington and Microsoft researchers could shrink the space needed to store digital data that today would fill a Walmart supercenter down to the size of a sugar cube. The team of computer scientists and electrical engineers has detailed one of the first complete systems to encode,...
https://www.biyologlar.com/uw-team-stores-digital-images-in-dna-and-retrieves-them-perfectly-haber-8723 -
Gene therapy shows long-term benefit for treating rare blindness
Pioneering gene therapy has restored some vision to patients with a rare form of genetic blindness for as long as four years, raising hopes it could be used to cure common causes of vision loss, new University of Oxford research published today shows.
https://www.biyologlar.com/gene-therapy-shows-long-term-benefit-for-treating-rare-blindness-haber-9436 -
RNA from Trained Aplysia Can Induce an Epigenetic Engram for Long-Term Sensitization in Untrained Aplysia.
Abstract The precise nature of the engram, the physical substrate of memory, remains uncertain. Here, it is reported that RNA extracted from the central nervous system of Aplysia given long-term sensitization training induced sensitization when injected into untrained animals; furthermore, the RNA-induced sensitization, like training-induced sensitization, required DNA methylation. In cellular experiments, treatment with RNA extracted from trained animals was found to increase excitability...
https://www.biyologlar.com/rna-from-trained-aplysia-can-induce-an-epigenetic-engram-for-long-term-sensitization-in-untrained-aplysia- -
RNA from Trained Aplysia Can Induce an Epigenetic Engram for Long-Term Sensitization in Untrained Aplysia.
Abstract The precise nature of the engram, the physical substrate of memory, remains uncertain. Here, it is reported that RNA extracted from the central nervous system of Aplysia given long-term sensitization training induced sensitization when injected into untrained animals; furthermore, the RNA-induced sensitization, like training-induced sensitization, required DNA methylation. In cellular experiments, treatment with RNA extracted from trained animals was found to increase excitability...
https://www.biyologlar.com/rna-from-trained-aplysia-can-induce-an-epigenetic-engram-for-long-term-sensitization-in-untrained-aplysia- -
Pancreas stem cell discovery may lead to new diabetes treatments
Stem cells in the adult pancreas have been identified that can be turned into insulin producing cells, a finding that means people with type 1 diabetes might one day be able to regenerate their own insulin-producing cells. The discovery was made by scientists from the Walter and Eliza Hall Institute and provides further evidence that stem cells don't only occur in the embryo. The ability to produce the hormone insulin is crucial for controlling blood sugar (glucose) levels. In people with...
https://www.biyologlar.com/pancreas-stem-cell-discovery-may-lead-to-new-diabetes-treatments -
Satellites show 'total' California water storage at near-decade low
Updates to satellite data show that California's Sacramento and San Joaquin River basins are at near decade-low water storage levels. These and other findings on the State's dwindling water resources were documented in an advisory report released today from the UC Center for Hydrologic Modeling (UCCHM) at the University of California, Irvine. Responding to Governor Jerry Brown's recent declaration of a drought emergency in California, a team of UCCHM researchers has updated its research on the...
https://www.biyologlar.com/satellites-show-total-california-water-storage-at-near-decade-low -
One of the last strongholds for Western chimpanzees
When Liberia enters the news it is usually in the context of civil war, economic crisis, poverty or a disease outbreak such as the recent emergence of Ebola in West Africa. Liberia's status as a biodiversity hotspot and the fact that it is home to some of the last viable and threatened wildlife populations in West Africa has received little media attention in the past. This is partly because the many years of violent conflict in Liberia, from 1989 to 1997 and from 2002 to 2003, thwarted efforts...
https://www.biyologlar.com/one-of-the-last-strongholds-for-western-chimpanzees -
Surprising global species shake-up discovered
The diversity of the world's life forms — from corals to carnivores — is under assault. Decades of scientific studies document the fraying of ecosystems and a grim tally of species extinctions due to destroyed habitat, pollution, climate change, invasives and overharvesting. Which makes a recent report in the journal Science rather surprising. Nick Gotelli, a professor at the University of Vermont, with colleagues from Saint Andrews University, Scotland, and the University of Maine,...
https://www.biyologlar.com/surprising-global-species-shake-up-discovered -
Genome-wide search reveals new genes involved in long-term memory
A new study has identified genes involved in long-term memory in the worm as part of research aimed at finding ways to retain cognitive abilities during aging. The study, which was published in the journal Neuron, identified more than 750 genes involved in long-term memory, including many that had not been found previously and that could serve as targets for future research, said senior author Coleen Murphy, an associate professor of molecular biology and the Lewis-Sigler Institute for...
https://www.biyologlar.com/genome-wide-search-reveals-new-genes-involved-in-long-term-memory -
Long-term changes in dead wood reveal new forest dynamics
Healthy forest ecosystems need dead wood to provide important habitat for birds and mammals, but there can be too much of a good thing when dead wood fuels severe wildfires. A scientist with the U.S. Forest Service's Pacific Southwest Research Station (PSW) compared historic and recent data from a forest in California's central Sierra Nevada region to determine how logging and fire exclusion have changed the amounts and sizes of dead wood over time. Results were recently published in Forest...
https://www.biyologlar.com/long-term-changes-in-dead-wood-reveal-new-forest-dynamics -
New method to grow zebrafish embryonic stem cells can regenerate whole fish
Zebrafish, a model organism that plays an important role in biological research and the discovery and development of new drugs and cell-based therapies, can form embryonic stem cells (ESCs).
https://www.biyologlar.com/new-method-to-grow-zebrafish-embryonic-stem-cells-can-regenerate-whole-fish -
Herpes outbreak, other marine viruses linked to coral bleaching event
A study at Oregon State University has concluded that significant outbreaks of viruses may be associated with coral bleaching events, especially as a result of multiple environmental stresses. One such event was documented even as it happened in a three-day period. It showed how an explosion of three viral groups, including a herpes-like virus, occurred just as corals were bleaching in one part of the Great Barrier Reef off the east coast of Australia. The findings, reported in Frontiers in...
https://www.biyologlar.com/herpes-outbreak-other-marine-viruses-linked-to-coral-bleaching-event -
West Coast scientists sound alarm for changing ocean chemistry
The ocean chemistry along the West Coast of North America is changing rapidly because of global carbon dioxide emissions, and the governments of Oregon, California, Washington and British Columbia can take actions now to offset and mitigate the effects of these changes. That is the conclusion of a 20-member panel of leading West Coast ocean scientists, who presented a comprehensive report on Monday outlining a series of recommendations to address the increase in ocean acidification and...
https://www.biyologlar.com/west-coast-scientists-sound-alarm-for-changing-ocean-chemistry -
Stem cell therapy improves outcomes in severe heart failure
A new stem cell therapy significantly improved long-term health outcomes in patients with severe and end-stage heart failure in a study presented at the American College of Cardiology's 65th Annual Scientific Session.
https://www.biyologlar.com/stem-cell-therapy-improves-outcomes-in-severe-heart-failure -
New procedure allows long-term culturing of adult stem cells
A new procedure developed at Massachusetts General Hospital (MGH) may revolutionize the culturing of adult stem cells. In their report that has been published online prior to its appearance in the August 6 issue of Cell Stem Cell, the team describes generating and expanding airway stem cells from the sorts of tissue samples collected during routine treatment of lung disorders. The overall approach appears applicable to several other tissue types, including skin and the linings of the...
https://www.biyologlar.com/new-procedure-allows-long-term-culturing-of-adult-stem-cells -
Quantum dots with impermeable shell: A powerful tool for nanoengineering
Images of ZnO quantum dots prepared by the Institute of Physical Chemistry of the Polish Academy of Sciences in Warsaw, taken by transmission electron microscopy. False colors.
https://www.biyologlar.com/quantum-dots-with-impermeable-shell-a-powerful-tool-for-nanoengineering -
Quantum dots with impermeable shell: A powerful tool for nanoengineering
Images of ZnO quantum dots prepared by the Institute of Physical Chemistry of the Polish Academy of Sciences in Warsaw, taken by transmission electron microscopy. False colors.
https://www.biyologlar.com/quantum-dots-with-impermeable-shell-a-powerful-tool-for-nanoengineering -
Scientists find that cancer can arise from changes in the proteins that package DNA
In some cancers, including chondroblastoma and a rare form of childhood sarcoma, a mutation in histone H3 reduces global levels of methylation (dark areas) in tumor cells
https://www.biyologlar.com/scientists-find-that-cancer-can-arise-from-changes-in-the-proteins-that-package-dna -
Watching 'jumping genes' in action
"Jumping genes" are ubiquitous. Every domain of life hosts these sequences of DNA that can "jump" from one position to another along a chromosome; in fact, nearly half the human genome is made up of jumping genes.
https://www.biyologlar.com/watching-jumping-genes-in-action -
Watching 'jumping genes' in action
"Jumping genes" are ubiquitous. Every domain of life hosts these sequences of DNA that can "jump" from one position to another along a chromosome; in fact, nearly half the human genome is made up of jumping genes.
https://www.biyologlar.com/watching-jumping-genes-in-action -
Open chromatin profiling key to identifying leukemia cells of origin
Every cancer starts with a single cell, and Jackson Laboratory (JAX) researchers have found a precise and reliable way -- whole-genome profiling of open chromatin -- to identify the kind of cell that leads to a given case of leukemia, a valuable key to cancer prognosis and outcome. "Knowing the cell of origin of cancer cells can provide insight into tumor subtypes and possibly diagnostic and therapeutic benefit," says JAX Assistant Professor Jennifer Trowbridge, Ph.D., the lead author of the...
https://www.biyologlar.com/open-chromatin-profiling-key-to-identifying-leukemia-cells-of-origin -
Honeybees pick up 'astonishing' number of pesticides via non-crop plants
Purdue researchers found that honeybees collect pollen from a wide range of plants, even in areas dominated by corn and soybeans.
https://www.biyologlar.com/honeybees-pick-up-astonishing-number-of-pesticides-via-non-crop-plants -
Honeybees pick up 'astonishing' number of pesticides via non-crop plants
Purdue researchers found that honeybees collect pollen from a wide range of plants, even in areas dominated by corn and soybeans.
https://www.biyologlar.com/honeybees-pick-up-astonishing-number-of-pesticides-via-non-crop-plants -
Watching a forest breathe
Flux towers are equipped with inlets for "sniffing the air " above the forest, in addition to other instruments such as sonic anemometers for measuring wind
https://www.biyologlar.com/watching-a-forest-breathe -
Watching a forest breathe
Flux towers are equipped with inlets for "sniffing the air " above the forest, in addition to other instruments such as sonic anemometers for measuring wind
https://www.biyologlar.com/watching-a-forest-breathe -
Marine carbon sinking rates confirm importance of polar oceans
Results show that the transfer efficiency of organic carbon from the surface to the deep ocean
https://www.biyologlar.com/marine-carbon-sinking-rates-confirm-importance-of-polar-oceans -
Arctic gives clues on worst mass extinction of life
96 percent of marine species, and 70 percent of terrestrial life died off in the Permian-Triassic extinction event, as geologists know it. It is also known as The Great Dying Event for obvious reasons.
https://www.biyologlar.com/arctic-gives-clues-on-worst-mass-extinction-of-life -
İndüklenmiş pluripotent kök hücreler
İnsan iPSC'lerinin hücre akıbetini kontrol etmek için kullanılan geniş bir hücre kültürü ortamı koleksiyonu, takviyeleri, biyoaktif küçük moleküller ve büyüme faktörleri sunuyoruz. Aşağıdaki tablo, insan iPSC'lerini farklı hücre soylarına ayırmak için kullanılan en yaygın şekilde kullanılan protokolleri, ortamları ve karakterizasyon antikorlarını vurgulamaktadır.
https://www.biyologlar.com/pluripotent-ozellik-nedir -
Genomes of chimpanzee parasite species reveal evolution of human malaria
Female orphan chimpanzee are cared for at the Sanaga-Yong Chimpanzee Rescue Center.
https://www.biyologlar.com/genomes-of-chimpanzee-parasite-species-reveal-evolution-of-human-malaria -
Genomes of chimpanzee parasite species reveal evolution of human malaria
Female orphan chimpanzee are cared for at the Sanaga-Yong Chimpanzee Rescue Center.
https://www.biyologlar.com/genomes-of-chimpanzee-parasite-species-reveal-evolution-of-human-malaria -
1986 Çernobil Nükleer Faciasından Yıllar Sonra Vahşi Yaşam Geri Döndü
1986’da yaşanan Çernobil Nükleer Faciası’ndan sonra binlerce insan, nükleer serpinti nedeniyle bir daha dönmemek üzere evlerini terk etti. Bölgede yeni yapılan bir araştırmaya göre Çernobil’de kanada geyiği, kızıl geyik, karaca, yaban domuzları ve kurtların sayısında artış var. Elde edilen bulgular vahşi yaşamın kendi haline bırakıldığında eski haline döndüğünü gösteriyor. Ayrıca elde edilen bulgular, Fukushima faciasının etkilerin uzun süreli...
https://www.biyologlar.com/1986-cernobil-nukleer-faciasindan-yillar-sonra-vahsi-yasam-geri-dondu -
Galaktozeminin Genetiği
Galaktozemiden etkilenmeyen (ne taşıyıcı ne de galaktozemik) biri, GALT enzim (galaktozu vücut için kullanılabilir hale getirmek için gerekli enzim) üretimi için iki normal gen devralır. Bu kişinin genotipi N/N' dir ve enzim aktivitesi normal olur. Klasik galaktozemi taşıyıcısı biri bir ebeveynden normal, diğerinden de klasik galaktozemiye yol açan hatayı kapsayan bir gen alır. Bu kişinin genotipi G/N' dir ve enzim aktivitesi normalden az ama tıbbi komplikasyonlara yol...
https://www.biyologlar.com/galaktozeminin-genetigi -
Human Papilloma Virus
HPV, genital bölge ve mukoza enfeksiyonları yapan, "condyloma acuminatum" adı verilen siğil şeklinde lezyonların oluşumuna neden olan ve servikal kanserle ilişkili olduğu kesin olarak saptanmış bir virüstür. Yaklaşık 100 farklı genotipi bulunan bu virüs vücuda girdiğinde hücre içine yerleşmekte ve immün sistemin zayıfladığı dönemlerde ortaya çıkmaktadır. HPV Moleküler Genetiği Papovavirüs ailesinden olan HPV, 72 kapsomerli, 45-50 nm boyutlarında, ikosahedral...
https://www.biyologlar.com/human-papilloma-virus -
Glikoproteinlerin Yapısı ve Fonksiyonları
Glikoproteinler, bakteriden insana kadar pek çok canlıda bulunur ve farklı işlevlere sahiptir. Kısa oligosakkarit zincirlerine sahip bu proteinler pek çok hücresel olayda hormonlar, virüsler ve başka maddeler tarafından hücre yüzeyinin tanınmasında görev alırlar. Ayrıca hücre yüzey antijenleri, hücre dışı matriksin elemanı, gastrointestinal ve ürogenital yolun müsin salgısı olarak görev yaparlar. Bunların yanında albümin hariç plazmadaki globuler proteinlerin...
https://www.biyologlar.com/glikoproteinlerin-yapisi-ve-fonksiyonlari -
KUŞ GRİBİ , TAVUK VEBASI
Ülkemizde önce geçtiğimiz yılın (2005) Ekim ayında Manyas-Kızıksa’da çıkan ve söndürülen Tavuk Vebası Aralık ayının sonunda yeniden çıkmış ve çok sayıda mihrak belirlenmiştir. Mikrak sayısının fazla olması nedeniyle, özellikle itlaf işlemleri başta olmak üzere yoğun çalışmalar yapılmakta ve hastalık izlenmektedir. Hastalıktan şüpheli evcil ve yaban hayatındaki kanatlılar teşhis için Tarım ve Köyişleri Bakanlığına bağlı Enstitülere...
https://www.biyologlar.com/kus-gribi-tavuk-vebasi -
Asperger sendromu
Asperger sendromu (AS) ya da Asperger bozukluğu, sosyal etkileşimde zorluklar ve sınırlı, stereotipik ilgi ve etkinliklerle tanımlanan otistik spektrum bozukluklarından (OSB) biridir.
https://www.biyologlar.com/asperger-sendromu -
Körlük ve kök hücre tedavisi: Yeni geliştirilen yöntem körlüğe çare olabilecek mi?
Kök hücre tedavisi tıpta oldukça yeni sayılabilecek bir tedavi yöntemidir. Göz hastalıklarında uygulanması ise daha da yeni sayılır. Uygulama her ne kadar yeni olsa da bu konuda beklentiler oldukça yüksek.
https://www.biyologlar.com/korluk-ve-kok-hucre-tedavisi-yeni-gelistirilen-yontem-korluge-care-olabilecek-mi -
Elektronik sigara zararlı mı ?
ELEKTRONİK SİGARANIN FAYDALARI Son zamanların en çok tartışılan konularından biri elektronik sigaranın zararlı olup olmadığı . Yıllardır sigara ticareti yapan eski tekellerin elinde tuttuğu tütün piyasası elektronik sigarayı normal sigaradan daha zararlıymış gibi göstermeye çalışsa da son yapılan çalışma durumun öyle olmadığını gösterdi. Bir çok ülkede kullanımı yasak olan elektronik sigaraların neden yasak olduğunu kimse açıklamıyor fakat...
https://www.biyologlar.com/elektronik-sigara-zararli-mi- -
Tardigrat - Tardigrade Hakkında Özel Bilgiler
Dünya'nın En Dayanıklı Hayvanı Tardigrat "Ramazzottius varieornatus" elektron mikroskop görüntüsü, Credit: Kazuharu Arakawa ve Hiroki Higashiyama
https://www.biyologlar.com/tardigrat-tardigrade-hakkinda-ozel-bilgiler -
Artık Bağışıklık Hücrelerimizin Uzun Süre Sonra Bile Hastalıkları Nasıl Hatırladıklarını Biliyoruz
Pek çoğumuz için, en son 20 yıl önce gördüğümüz yüzleri hatırlayabilmek zorlayıcı olabilir. cenksns/Shutterstock
https://www.biyologlar.com/artik-bagisiklik-hucrelerimizin-uzun-sure-sonra-bile-hastaliklari-nasil-hatirladiklarini-biliyoruz -
Nanomantar Sensörleri : Tek Materyal, Birçok Uygulama
Gerçek zamanlı olarak hücre çoğalmasını algılama potansiyeline sahip silikon dioksit kaynaklı ve altın kapaklara sahip nano ölçekli mantar benzeri yapıların üstündeki hücrelerin (mavi dağ benzeri şekilleri) şematik gösterimi. Credit: OIST
https://www.biyologlar.com/nanomantar-sensorleri-tek-materyal-bircok-uygulama -
Nanomantar Sensörleri : Tek Materyal, Birçok Uygulama
Gerçek zamanlı olarak hücre çoğalmasını algılama potansiyeline sahip silikon dioksit kaynaklı ve altın kapaklara sahip nano ölçekli mantar benzeri yapıların üstündeki hücrelerin (mavi dağ benzeri şekilleri) şematik gösterimi. Credit: OIST
https://www.biyologlar.com/nanomantar-sensorleri-tek-materyal-bircok-uygulama -
Hayvan Bilinci
Hayvanlar çevrelerinden aldıkları bilgileri bir yere hareket etmek, aktiviteleri için zamanlarını ayarlamak, miktarı değerlendirmek veya geçmişi hatırlamak için nasıl kullanırlar?
https://www.biyologlar.com/hayvan-bilinci-1 -
RNA Aktarımıyla Duyusal Bilgi Nakli Gerçekleştirildi
Kaliforniya Üniversitesi Los Angeles Kampüsü biyologları, iki canlı arasında duyusal bilgi aktarımı yapmayı başardıklarını duyurdu. Görsel Telif: Wikimedia, Genny Anderson
https://www.biyologlar.com/rna-aktarimiyla-duyusal-bilgi-nakli-gerceklestirildi -
Bilim tarihinde yeni bir eşik: RNA enjeksiyonu ile hafıza transferi yapıldı
Bilim insanları tıp tarihinde yeni bir eşiği daha geçtiler ve ilk kez bir canlıda RNA (Ribo Nükleik Asit) ile hafıza transferi yaparak yapay hafıza oluşturmayı başardı.
https://www.biyologlar.com/bilim-tarihinde-yeni-bir-esik-rna-enjeksiyonu-ile-hafiza-transferi-yapildi -
Graves Hastalığı Hakkında Bilgi
Bu hastalık, bağışıklık sisteminin tiroid uyarıcı immünoglobulin (TSI) olarak bilinen bir antikoru savaşması için tiroid bezine doğru yönlendirmesi sonucu oluşmaktadır.
https://www.biyologlar.com/graves-hastaligi-hakkinda-bilgi -
Sneddon sendromu hakkında bilgi
Sneddon Sendromu / Sneddon Syndrome
https://www.biyologlar.com/sneddon-sendromu-hakkinda-bilgi