Toplam 266 içerik listeleniyor
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Cells are crawling all over our bodies, but how?
For better and for worse, human health depends on a cell's motility –– the ability to crawl from place to place. In every human body, millions of cells –are crawling around doing mostly good deeds ––– though if any of those crawlers are cancerous, watch out.
https://www.biyologlar.com/cells-are-crawling-all-over-our-bodies-but-how -
Antibiotic resistance genes increasing
Antibiotic genes are increasing and are just a plane ride away. Around the world, antibiotic use and resistance is increasing while the discovery of new antibiotics has nearly halted.
https://www.biyologlar.com/antibiotic-resistance-genes-increasing-haber-8125 -
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 -
New gene therapy method provides specific, safe control of therapeutic transgenes
Korean researchers have described a novel control system to regulate the expression of a therapeutic transgene by targeting the passenger strand of a microRNA (miR-122) linked to the transgene. The researchers report that a control system based on targeting the passenger strand of miR-122 rather than the guide strand can regulate expression of an exogenous, therapeutic gene, while not affecting the expression of endogenous genes, in an article in Nucleic Acid Therapeutics. The article is...
https://www.biyologlar.com/new-gene-therapy-method-provides-specific-safe-control-of-therapeutic-transgenes-haber-8763 -
The Genetic Structure of Anatolia: From the Neolithic to the Oghuz Migrations
Anatolia has witnessed many migrations and has been home to a variety of civilizations. The increasing availability of ancient DNA samples from different periods and cultures makes it now possible to examine the genetic changes that have taken place in Anatolia since the Neolithic. The ancient DNA revolution has already dispelled many myths, but myths and legends die hard. Some of the more persistent ones concern the impact of the last migration wave to hit Anatolia, marked by the arrival of...
https://www.biyologlar.com/the-genetic-structure-of-anatolia-from-the-neolithic-to-the-oghuz-migrations -
FİTOTERAPİ Bitkilerle tedavi
Fitoterapi, bitkilerin bilimsel temele dayalı akılcı bir yaklaşımla hastalıkların tedavisi veya önlenmesinde kullanımını anlamına gelmektedir. Bitki ve Tedavi sözcüklerinden oluşan fitoterapi, terimi ilk kez, Fransız hekim Henri Leclerc(1870-1955) tarafından `La Presse Medical` adlı dergide, 1939 yılında kullanılmış olsa da bitkilerin tedavide kullanılışı aslında insanlığın ortaya çıkışı ile başlar. İlk insanlar, bitki ve hayvanları izleyerek tedavi...
https://www.biyologlar.com/fitoterapi-bitkilerle-tedavi -
CARETTA CARETTA ( DENİZ KAPLUMBAĞALARI ) MORFOLOJİK ÖZELLİKLERİ
Deniz kaplumbağalarının yaklaşık 100-200 milyon yıldan beri dünyamızda yaşadığı bilinmektedir. Karadan denize geçen en eski sürüngen türü olan deniz kaplumbağaları artık yaşamlarını denizde geçirmektedirler. VİDEOLAR İÇİN TIKLAYINwww.cyprusseaturtles.org/videolar/Turler..._Chelonia_mydas.html www.cyprusseaturtles.org/videolar/Turler...Caretta_caretta.html Günümüzde Dünyada yaşayan sekiz tür deniz kaplumbağası (Dermochelys coriacea, Eretmochelys imbricata,...
https://www.biyologlar.com/caretta-caretta-deniz-kaplumbagalari-morfolojik-ozellikleri -
Balıklarda Üreme
Balıkların üreme organları genellikle gonadlar olup, bunlar dişide ovaryum, erkekte ise testis adını alırlar.
https://www.biyologlar.com/baliklarda-ureme -
Stem cells + nanofibers = Promising nerve research
Every week in his clinic at the University of Michigan, neurologist Joseph Corey, M.D., Ph.D., treats patients whose nerves are dying or shrinking due to disease or injury.
https://www.biyologlar.com/stem-cells-nanofibers-promising-nerve-research -
Oksijensiz yaşayabilen çıplak fareler
Araştırmacılar, çıplak kemirgenlerin düşük oksijen düzeylerinden etkilenmediğini ve 18 dakikaya kadar herhangi bir oksijen olmadan hayatta kalabileceğini keşfettiler. Photo credit: Theron Trowbridge / Flickr (CC BY-NC 2.0)
https://www.biyologlar.com/oksijensiz-yasayabilen-ciplak-fareler -
Oksijensiz yaşayabilen çıplak fareler
Araştırmacılar, çıplak kemirgenlerin düşük oksijen düzeylerinden etkilenmediğini ve 18 dakikaya kadar herhangi bir oksijen olmadan hayatta kalabileceğini keşfettiler. Photo credit: Theron Trowbridge / Flickr (CC BY-NC 2.0)
https://www.biyologlar.com/oksijensiz-yasayabilen-ciplak-fareler -
CARETTA CARETTA ( DENİZ KAPLUMBAĞALARININ ) ÜREME ALANLARI
Akdeniz Bölgesindeki Üreme alanları: Günümüzde Akdeniz bölgesinde deniz kaplumbağalarının üremelerine elverişli uygun sahiller hızla yokolma sürecine girmiştir. Gelişen turizm faaliyetleri, aşırı yapılaşma ve denizin kirletilmesi sonucunda üreme sahilleri azalmaktadır. Caretta caretta türü deniz kaplumbağalarının önemli üreme alanları Yunanistan, Türkiye ve Kıbrıs etrafında yoğunluk göstermektedir. Akdenizdeki en önemli üreme alanı Yunanistan’daki...
https://www.biyologlar.com/caretta-caretta-deniz-kaplumbagalarinin-ureme-alanlari -
Hirfanlı Baraj Gölünde Yaşayan Yayın Balığı ( Silurus glanis L.,1758 ) nın Sindirim Kanalı Helmintlerinin Tespiti
Hirfanlı Baraj Gölünde Yaşayan Yayın Balığı ( Silurus glanis L.,1758) nın Sindirim Kanalı Helmintlerinin Tespiti
https://www.biyologlar.com/hirfanli-baraj-golunde-yasayan-yayin-baligi-silurus-glanis-l-1758-nin-sindirim-kanali-helmintlerinin-tespiti -
How knots can swap positions on a DNA strand
Physicists of Johannes Gutenberg University Mainz (JGU) and the Graduate School of Excellence "Materials Science in Mainz" (MAINZ) have been able with the aid of computer simulations to confirm and explain a mechanism by which two knots on a DNA strand can interchange their positions. For this, one of the knots grows in size while the other diffuses along the contour of the former. Since there is only a small free energy barrier to swap, a significant number of crossing events have been...
https://www.biyologlar.com/how-knots-can-swap-positions-on-a-dna-strand -
Coral reefs in Palau surprisingly resistant to naturally acidified waters
Ocean researchers working on the coral reefs of Palau in 2011 and 2012 made two unexpected discoveries that could provide insight into corals' resistance and resilience to ocean acidification, and aid in the creation of a plan to protect them. The team collected water samples at nine points along a transect that stretched from the open ocean, across the barrier reef, into the lagoon and then into the bays and inlets around the Rock Islands of Palau, in the western Pacific Ocean. With each...
https://www.biyologlar.com/coral-reefs-in-palau-surprisingly-resistant-to-naturally-acidified-waters -
İNSANIN EVRİMİ
19. yy’ın ortalarıydı. 1859' yılında Türlerin Kökeni adlı bir kitap yayınlandı.Kitap Darvin imzasını taşıyordu : Charles Darwin ( 1809-1882). Darwin, 19. yüzyılın dahilerinden biriydi. 1871 de ise İnsanın İnişi yayımlandı. İşte Darvin' in bu kitapları insanın doğuşunun bilimsel anlamda ilk açıklama bildirileriydi. İnsanın Afrika' da ve Ekvator yakınında "doğduğu" artık kesinleşmiştir diyebiliriz. (İnsanın Yücelişi, s: 25) Dünya, böyle gelmiş...
https://www.biyologlar.com/insanin-evrimi -
Magnetic nanoparticles could be key to effective immunotherapy
In recent years, researchers have hotly pursued immunotherapy, a promising form of treatment that relies on harnessing and training the body's own immune system to better fight cancer and infection. Now, results of a study led by Johns Hopkins investigators suggests that a device composed of a magnetic column paired with custom-made magnetic nanoparticles may hold a key to bringing immunotherapy into widespread and successful clinical use. A summary of the research, conducted in mouse and human...
https://www.biyologlar.com/magnetic-nanoparticles-could-be-key-to-effective-immunotherapy -
Stem-cell approach shows promise for Duchenne muscular dystrophy
Researchers have shown that transplanting stem cells derived from normal mouse blood vessels into the hearts of mice that model the pathology associated with Duchenne muscular dystrophy (DMD) prevents the decrease in heart function associated with DMD. Their findings appear in the journal Stem Cells Translational Medicine. Duchenne muscular dystrophy is a genetic disorder caused by a mutation in the gene for dystrophin, a protein that anchors muscle cells in place when they contract. Without...
https://www.biyologlar.com/stem-cell-approach-shows-promise-for-duchenne-muscular-dystrophy -
Evrimin Kanıtları Var mı?
" Hayvan türlerinden biri olarak, biz insanlar, diğer türler gibi evrimin yasalarına uyarız. Bu savı, destekleyecek birçok kanıta da sahibiz. Öncelikle, diğer omurgalı hayvanlarda bulunan birçok benzer ve kökendeş (homolog) yapıya ve organa sahibiz. Diğer hayvanlarda işlev gören birçok yapıyı biz körelmiş olarak taşırız. Embriyomuz gelişirken, solungaç keselerini, basit kalbi; ilkel boşaltim tiplerini, diger omurgali hayvanlardakine benzeyen kuyrugu ve buna benzer...
https://www.biyologlar.com/evrimin-kanitlari-var-mi -
Göllerin Jeolojik Yapıları
Göller göl çukurlarının meydana geliş şekillerine göre ikiye ayrılır. Doğal göller: Doğal çukurlarda suların toplanmasıyla oluşan göllerdir. Tektonik göller: Kıtalar arası kaymayla oluşan çatlakların, çukurların su ile dolmasından meydana gelmiş büyük ve derin göllerdir . Örneğin; Afrika’daki Tanganika gölü,Takoe gölü Asyadaki Baykal gölü, Aral gölü Türkiye’de Burdur, Eğridir, Acıgöl, Tuz gölü Hazar, Sapanca gölleri vardır . Ülkemiz...
https://www.biyologlar.com/gollerin-jeolojik-yapilari -
Stem-cell-based strategy boosts immune system in mice
Raising hopes for cell-based therapies, UC San Francisco researchers have created the first functioning human thymus tissue from embryonic stem cells in the laboratory. The researchers showed that, in mice, the tissue can be used to foster the development of white blood cells the body needs to mount healthy immune responses and to prevent harmful autoimmune reactions. The scientists who developed the thymus cells — which caused the proliferation and maturation of functioning immune cells...
https://www.biyologlar.com/stem-cell-based-strategy-boosts-immune-system-in-mice -
Kene İle Bulaşan Hastalıklar
ÖZET Parazitlerin neden olduğu hastalıklar önemli sağlık problemidir. Endoparazit ve ektoparaziter hastalıklar mevcuttur. Kenelerle bulaşan hastalıklar en sık görülen vektör kaynaklı hastalıklardır. Keneler bakteri, virüs spiroket, protozoa, nematod ve toksinler gibi patojenleri yayabilir ve böylece ektoparaziter kaynaklı hastalıklara sebep olurlar. Ülkemizde keneler için iklim koşulları, bitki örtüsü ve yüzey şekli bakımından uygun koşullar vardır. Bu...
https://www.biyologlar.com/kene-ile-bulasan-hastaliklar -
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 -
Evrim Nedir
“Bilimler, düşündügümüzün tam tersi bir düzen içinde geliştiler. Bize en uzak olan şeylerin yasalari en önce bulundu, sonra yavaş yavaş daha yakinlara sira geldi: Ilkin gökler, arkadan yer, sonra hayvanlarla bitmkilerin yaşami, sonra insan gövedesi en sonra da (Yine de en yarim yamala) insan zihni. Bu durumun anlaşilamayaca bir yani yoktur... Yalniz teme doga yasalarinin bulunmasi degil, dünyanin uzun süreli gelişmesiyle ilgil ögretinin kurulmasi da gökbilimle başladi;...
https://www.biyologlar.com/evrim-nedir -
Örümcek Türleri
Örümcek, eklembacaklıların örümceğimsiler (Arachnida) sınıfının örümcekler (Araneida) takımından türlerine verilen genel ad. Hemen hemen dünyanın her tarafında yaşarlar. 63.000 kadar türü vardır. Baş ve göğüs kaynaşmıştır. Karın, göğüse ince bir bel (pedisel) ile bağlanmıştır. Aynı büyüklükte başka bir canlının beli bu kadar ince değildir. İçinden sindirim borusu, kan damarları nefes boruları ve sinir sistemi geçer. Örümceklerin boyları,...
https://www.biyologlar.com/orumcek-turleri -
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 -
Chip-based technology enables reliable direct detection of Ebola virus
A team led by researchers at UC Santa Cruz has developed chip-based technology for reliable detection of Ebola virus and other viral pathogens. The system uses direct optical detection of viral molecules and can be integrated into a simple, portable instrument for use in field situations where rapid, accurate detection of Ebola infections is needed to control outbreaks. Laboratory tests using preparations of Ebola virus and other hemorrhagic fever viruses showed that the system has the...
https://www.biyologlar.com/chip-based-technology-enables-reliable-direct-detection-of-ebola-virus -
Kimerler, Kediler ve Diğer Genetik Tuhaflıklar
Hayır, bu bir fotoğraf hilesi değil. Bu gördüğünüz kedicik, aslında bir Kimer olmayan, ama bu yazıyı yazmak için bana esin kaynağı olan Venüs. (Kaynak: Facebook)
https://www.biyologlar.com/kimerler-kediler-ve-diger-genetik-tuhafliklar -
New Science paper calculates magnitude of plastic waste going into the ocean
A plastic grocery bag cartwheels down the beach until a gust of wind spins it into the ocean. In 192 coastal countries, this scenario plays out over and over again as discarded beverage bottles, food wrappers, toys and other bits of plastic make their way from estuaries, seashores and uncontrolled landfills to settle in the world's seas. How much mismanaged plastic waste is making its way from land to ocean has been a decades-long guessing game. Now, the University of Georgia's Jenna Jambeck...
https://www.biyologlar.com/new-science-paper-calculates-magnitude-of-plastic-waste-going-into-the-ocean -
Wisconsin scientists find genetic recipe to turn stem cells to blood
The ability to reliably and safely make in the laboratory all of the different types of cells in human blood is one key step closer to reality.
https://www.biyologlar.com/wisconsin-scientists-find-genetic-recipe-to-turn-stem-cells-to-blood -
Damaged DNA may stall patrolling molecule to initiate repair
Sites where DNA is damaged may cause a molecule that slides along the DNA strand to scan for damage to slow on its patrol, delaying it long enough to recognize and initiate repair. The finding suggests that the delay itself may be the key that allows the protein molecule to find its target, according to researchers at the University of Illinois at Chicago. Usually, the repair protein zips along quickly, says Anjum Ansari, UIC professor of physics and co-principal investigator on the study,...
https://www.biyologlar.com/damaged-dna-may-stall-patrolling-molecule-to-initiate-repair -
Snake venom helps hydrogels stop the bleeding
A nanofiber hydrogel infused with snake venom may be the best material to stop bleeding quickly, according to Rice University scientists. The hydrogel called SB50 incorporates batroxobin, a venom produced by two species of South American pit viper. It can be injected as a liquid and quickly turns into a gel that conforms to the site of a wound, keeping it closed, and promotes clotting within seconds. Rice chemist Jeffrey Hartgerink, lead author Vivek Kumar and their colleagues reported their...
https://www.biyologlar.com/snake-venom-helps-hydrogels-stop-the-bleeding -
Amniotic stem cells demonstrate healing potential
Rice University and Texas Children's Hospital scientists are using stem cells from amniotic fluid to promote the growth of robust, functional blood vessels in healing hydrogels.
https://www.biyologlar.com/amniotic-stem-cells-demonstrate-healing-potential -
15. Avrupa Biyoteknoloji Kongresi - 15th European Congress on Biotechnology
Biyoteknoloji Dünyası İstanbul’da Bir Araya Geliyo Biyoteknoloji Derneği’nin ev sahipliğinde Zed Etkinlik Yönetimi ve Danışmanlığı tarafından gerçekleştirilecek olan kongre 23-26 Eylül tarihlerinde İstanbul Grand Cevahir Otel’ de biyoteknoloji dünyasını bir araya getiriyo “Bio-crossroads” teması ile 15.kez düzenlenecek olan kongre son olarak, 2009 yılında İspanya’nın Barcelona şehrinde gerçekleştirildi. 108 Kurumsal, 12 binin üzerinde kişisel üyesi...
https://www.biyologlar.com/15-avrupa-biyoteknoloji-kongresi-15th-european-congress-on-biotechnology -
Virginia Tech researchers take cue from spider glue in efforts to create new materials
A taut tug on the line signals the arrival of dinner, and the leggy spider dashes across the web to find a tasty squirming insect. The spider, known as an orb weaver, must perfectly execute this moment, from a lightning-fast reaction to an artfully spun web glistening with sticky glue. This glue -- created when glycoproteins are secreted from a spider's abdomen and interact with the atmosphere -- has been studied for the past 12 years by Brent Opell, a professor of biological sciences in the...
https://www.biyologlar.com/virginia-tech-researchers-take-cue-from-spider-glue-in-efforts-to-create-new-materials -
Role of telomeres in plant stem cells discovered
The role played by telomeres in mammalian cells has been known for several years. It is also known that these non-coding DNA sequences, which are found at the ends of the chromosomes, protect them and are necessary to ensure correct cell division.
https://www.biyologlar.com/role-of-telomeres-in-plant-stem-cells-discovered -
Fishing impacts on the Great Barrier Reef
New research shows that fishing is having a significant impact on the make-up of fish populations of the Great Barrier Reef. It's long been known that environmental impacts such as climate change and pollution are amongst the drivers of change on the Great Barrier Reef. Now researchers from the ARC Centre of Excellence for Coral Reef Studies (Coral CoE) at James Cook University have found that removing predatory fish such as coral trout and snapper, through fishing, causes significant changes...
https://www.biyologlar.com/fishing-impacts-on-the-great-barrier-reef -
Functional human liver cells grown in the lab
In new research appearing in the prestigious journal Nature Biotechnology, an international research team led by The Hebrew University of Jerusalem describes a new technique for growing human hepatocytes in the laboratory. This groundbreaking development could help advance a variety of liver-related research and applications, from studying drug toxicity to creating bio-artificial liver support for patients awaiting transplantations. The liver is the largest internal organ in the human body,...
https://www.biyologlar.com/functional-human-liver-cells-grown-in-the-lab -
Scientists create functional liver cells from stem cells
The liver plays a critical role in human metabolism. As the gatekeeper of the digestive track, this massive organ is responsible for drug breakdown and is therefore the first to be injured due to overdose or misuse. Evaluating this drug-induced liver injury is a critical part of pharmaceutical drug discovery and must be carried out on human liver cells. Regretfully, human liver cells, called hepatocytes, are in scarce supply as they can only be isolated from donated organs. Now, in research...
https://www.biyologlar.com/scientists-create-functional-liver-cells-from-stem-cells -
Why some neurons 'outsource' their cell body
Nerve cells come in very different shapes. Researchers at the Bernstein Center Berlin now reveal why, in insects, the cell body is usually located at the end of a separate extension. Using mathematical models, they show that this increases the strength of electrical signal transmission at no additional energetic cost. Nerve cells follow a functional design: They receive input signals over more or less ramified cell branches (dendrites), which they forward to other nerve cells along an...
https://www.biyologlar.com/why-some-neurons-outsource-their-cell-body -
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 -
Brazilian beef industry moves to reduce its destruction of rain forests
Expansion of cattle pastures has led to the destruction of huge swaths of rain forest in Brazil, home to the world's largest herd of commercial beef cattle. But a new study led by the University of Wisconsin-Madison's Holly Gibbs shows that market-driven "zero deforestation agreements" have dramatically influenced the behavior of ranchers and the slaughterhouses to which they sell. Publishing today [May 12, 2015] in the journal Conservation Letters, the research team - including other...
https://www.biyologlar.com/brazilian-beef-industry-moves-to-reduce-its-destruction-of-rain-forests -
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 -
Shiny fish skin inspires nanoscale light reflectors
A nature-inspired method to model the reflection of light from the skin of silvery fish and other organisms may be possible, according to Penn State researchers. Such a technique may be applicable to developing better broadband reflectors and custom multi-spectral filters for a wide variety of applications, including advanced optical coatings for glass, laser protection, infrared imaging systems, optical communication systems and photovoltaics, according to Douglas Werner, John L. and...
https://www.biyologlar.com/shiny-fish-skin-inspires-nanoscale-light-reflectors -
Lab experiments question popular measure of ancient ocean temperatures
Understanding the planet's history is crucial if we are to predict its future. While some records are preserved in ice cores or tree rings, other records of the climate's ancient past are buried deep in the seafloor. An increasingly popular method to deduce historic sea surface temperatures uses sediment-entombed bodies of marine archaea, one of Earth's most ancient and resilient creatures, as a 150-million-year record of ocean temperatures. While other measures have gaps, this one is...
https://www.biyologlar.com/lab-experiments-question-popular-measure-of-ancient-ocean-temperatures -
Deniz Biyolojisi
Su an yeryüzünde görebildiginiz tüm canlilar, dogadaki canlilarin çok küçük bir bölümünü teskil etmektedir.Yeryüzünün üçte ikisinin sularla kapli oldugunu düsündügümüz zaman, okyanus ve denizlerde yasayan canlilar aleminin ne kadar devasal oldugunu anlayabiliriz. Yapilan arastirmalara göre dünya üzerindeki su kütlesinin hemen hemen tamami volkanik patlamalardan atmosfere salinan su buharindan husule gelmistir. Atmosfere salinan yüksek miktardaki su buhari yogunlasarak...
https://www.biyologlar.com/deniz-biyolojisi -
Odd histone helps suppress jumping genes in stem cells, study says
A family of proteins known as histones provides support and structure to DNA, but for years, scientists have been puzzling over occasional outliers among these histones, which appear to exist for specific, but often mysterious reasons. Now, researchers have uncovered a new purpose for one such histone variant: preventing genetic mutations by keeping certain so-called "jumping genes" in place. This research, which began at Rockefeller University and was published May 4 in Nature, reveals a...
https://www.biyologlar.com/odd-histone-helps-suppress-jumping-genes-in-stem-cells-study-says -
Forensic botany uses plant DNA to trace crimes
Sam Houston State University is advancing the field of forensic botany with the publication of two recent studies that use marijuana DNA to link drug supplies and pollen DNA to aid in forensic investigations. In an article published in the International Journal of Legal Medicine, faculty and students from the Department of Forensic Science report that they developed a test to individualize samples of marijuana that could be used to link drugs across cases. The study examined 11 cases...
https://www.biyologlar.com/forensic-botany-uses-plant-dna-to-trace-crimes -
Tough times for the tree of life on coral reefs
Marine scientists are calling for a re-think of how marine protected areas (MPAs) are planned and coordinated, following a global assessment of the conservation of tropical corals and fishes. Researchers from the Australian Research Council Centre of Excellence for Coral Reef Studies (Coral CoE), at James Cook University in Townsville, analysed the extent to which the evolutionary histories of corals and fishes are protected, rather than looking at individual species. "Our interest was in...
https://www.biyologlar.com/tough-times-for-the-tree-of-life-on-coral-reefs -
Decaying RNA molecules tell a story
Once messenger RNA (mRNA) has done its job - conveying the information to produce the proteins necessary for a cell to function - it is no longer required and is degraded. Scientists have long thought that the decay started after translation was complete and that decaying RNA molecules provided little biological information. Now a team from EMBL Heidelberg and Stanford University led by Lars Steinmetz has turned this on its head in an article published in Cell. The researchers have shown that...
https://www.biyologlar.com/decaying-rna-molecules-tell-a-story