Toplam 91 içerik listeleniyor
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Bird genomes contain 'fossils' of parasites that now infect humans
The researchers found DNA 'fossils' of parasitic nematodes in seven groups of birds (clockwise): trogons, mesites, parrots, hummingbirds, hornbills, manakins, tinamous. In rare instances, DNA is known to have jumped from one species to another. If a parasite's DNA jumps to its host's genome, it could leave evidence of that parasitic interaction that could be found millions of years later -- a DNA 'fossil' of sorts. An international research team led from Uppsala University has discovered a new...
https://www.biyologlar.com/bird-genomes-contain-aposfossils-apos-of-parasites-that-now-infect-humans-haber-8710 -
KÖK HÜCRELERE BAKIŞ:TANIMLAR, KAVRAMLAR ve SINIFLANDIRMALAR
İki binli yıllarla beraber kök hücrelerin rejeneratif tıp (yenileyici tıp) alanındaki öneminin giderek arttığını ve tıbbın geleceğini şekillendirme potansiyelini gözlemlemekteyiz.
https://www.biyologlar.com/kok-hucrelere-bakistanimlar-kavramlar-ve-siniflandirmalar -
Improving the delivery of chemotherapy with graphene
A new study published in IOP Publishing's journal 2D Materials has proposed using graphene as an alternative coating for catheters to improve the delivery of chemotherapy drugs. The research suggests that placing graphene - an extremely thin sheet of carbon atoms - on the internal surfaces of intravenous catheters commonly used to deliver chemotherapy drugs into a patient's body will improve the efficacy of treatments, and reduce the potential of the catheters breaking. The study indicates...
https://www.biyologlar.com/improving-the-delivery-of-chemotherapy-with-graphene -
New discovery in living cell signaling
A breakthrough discovery into how living cells process and respond to chemical information could help advance the development of treatments for a large number of cancers and other cellular disorders that have been resistant to therapy. An international collaboration of researchers, led by scientists with the U.S. Department of Energy (DOE)'s Lawrence Berkeley National Laboratory (Berkeley Lab) and the University of California (UC) Berkeley, have unlocked the secret behind the activation of the...
https://www.biyologlar.com/new-discovery-in-living-cell-signaling -
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 -
Detecting HIV diagnostic antibodies with DNA nanomachines
New research may revolutionize the slow, cumbersome and expensive process of detecting the antibodies that can help with the diagnosis of infectious and auto-immune diseases such as rheumatoid arthritis and HIV. An international team of researchers have designed and synthetized a nanometer-scale DNA "machine" whose customized modifications enable it to recognize a specific target antibody. Their new approach, which they described this month in Angewandte Chemie, promises to support the...
https://www.biyologlar.com/detecting-hiv-diagnostic-antibodies-with-dna-nanomachines -
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 -
Wheat disease-resistance gene identified, potential to save billions
A gene that can prevent some of the most important wheat diseases has been identified--creating the potential to save more than a billion dollars in lost production in Australia alone each year. In a global collaboration including the University of Sydney's Plant Breeding Institute (PBI), the CSIRO, CIMMYT (Mexico), University of Newcastle, Chinese Academy of Sciences and the Norwegian University of Life Sciences, the gene Lr67 has been identified as providing resistance to three of the most...
https://www.biyologlar.com/wheat-disease-resistance-gene-identified-potential-to-save-billions -
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 -
Closing the case on an ancient archeological mystery
Climate change may be responsible for the abrupt collapse of civilization on the fringes of the Tibetan Plateau around 2000 B.C. WSU archaeologist Jade D'Alpoim Guedes and an international team of researchers found that cooling global temperatures at the end of the Holocene Climatic Optimum, a 4,000 year period of warm weather, would have made it impossible for ancient people on the Tibetan Plateau to cultivate millet, their primary food source. Guedes' team's research recently was published...
https://www.biyologlar.com/closing-the-case-on-an-ancient-archeological-mystery -
Discovery of an embryonic switch for cancer stem cell generation
An international team of scientists, headed by researchers at UC San Diego School of Medicine and UC San Diego Moores Cancer Center, report that decreases in a specific group of proteins trigger changes in the cancer microenvironment that accelerate growth and development of therapy-resistant cancer stem cells (CSCs). The discovery suggests the basis for a potential new therapeutic approach to eradicate blood cancers, which affect more than 1.1 million Americans. In fact, researchers found...
https://www.biyologlar.com/discovery-of-an-embryonic-switch-for-cancer-stem-cell-generation -
Tara Oceans expedition yields treasure trove of plankton data
In five related reports in this issue of the journal Science, a multinational team of researchers who spent three and a half years sampling the ocean's sunlit upper layers aboard the schooner Tara unveil the first officially reported global analyses of the Tara Oceans consortium. Planktonic life in the ocean is far more diverse than scientists knew, these reports show. They provide new resources for cataloguing the ocean's numerous planktonic organisms, which -- though critical to life on...
https://www.biyologlar.com/tara-oceans-expedition-yields-treasure-trove-of-plankton-data -
Türkiye Zootekni Bölümlerinde Hayvan Davranışları Bilimi
Hayvan davranışları bilimi bakımından Türkiye’de son yıllarda sevindirici gelişmeler yaşanmaktadır. Lisans ve lisansüstü ders olarak hayvan davranışları, zootekni bölümü olan neredeyse tüm üniversitelerde okutulmaya başlanmıştır. Genellikle lisansta zorunlu ders olarak genel hayvan davranışları verilmekte, lisansüstünde ise seçmeli ders olarak türlere özgü davranış dersleri yer almaktadır. Ülkemizde davranış derslerinin türlere özgünleşmesi...
https://www.biyologlar.com/turkiye-zootekni-bolumlerinde-hayvan-davranislari-bilimi -
Thousands on one chip: New method to study proteins
Protein microarrays like this allow the investigation of thousands of proteins in a single experiment. Microarrays are only a few centimeters in size and host thousands of individual test spots...
https://www.biyologlar.com/thousands-on-one-chip-new-method-to-study-proteins -
Thousands on one chip: New method to study proteins
Protein microarrays like this allow the investigation of thousands of proteins in a single experiment. Microarrays are only a few centimeters in size and host thousands of individual test spots...
https://www.biyologlar.com/thousands-on-one-chip-new-method-to-study-proteins -
Nesli Tükenen Hayvanlar İçin Neler Yapılabilir
Yabani Hayvanların biz insanlarla kontrollü ortak yasam alanlarını paylaşım geleneği çok eskilere dayanmaktadır. Yaklaşık 3 bin yıllık tarihi bir geçmişi olan bu ilişkiyi gerek yabani hayvan barınakları ve gerekse hayvanat bahçelerinin (ZOO) yaptıkları birçok araştırmadan biliyoruz. Bunlar arasında Cin`deki "intelligentia park i" en tarihi olanı unvanına sahiptir ve bunun dışında eski mısırdaki hayvan barınakları ve Romalılar döneminde "Campagna"lardaki fil...
https://www.biyologlar.com/nesli-tukenen-hayvanlar-icin-neler-yapilabilir -
CRISPR gene editing reveals new therapeutic approach for blood disorders
This is a scanning electron micrograph of sickled and other red blood cells.
https://www.biyologlar.com/crispr-gene-editing-reveals-new-therapeutic-approach-for-blood-disorders -
CRISPR gene editing reveals new therapeutic approach for blood disorders
This is a scanning electron micrograph of sickled and other red blood cells.
https://www.biyologlar.com/crispr-gene-editing-reveals-new-therapeutic-approach-for-blood-disorders -
Many endangered species are back -- but face new struggles
A study of marine mammals and other protected species finds that several once endangered species, including the iconic humpback whale, the northern elephant seal and green sea turtles, have recovered and are repopulating their former ranges. The research, published in the June edition of Trends in Ecology and Evolution, suggests that some species, including humpback whales, have reached population levels that may warrant removal from endangered species lists. But returning species, which defy...
https://www.biyologlar.com/many-endangered-species-are-back-but-face-new-struggles -
Eukaryotes: A new timetable of evolution
Contaminated samples have evidently created some confusion in the timetable of life. On the basis of ultra-clean analyses, an international team, including scientists from the Max Planck Institute for Biogeochemistry, has disproved supposed evidence that eukaryotes originated 2.5 to 2.8 billion years ago. In contrast to prokaryotes such as bacteria, eukaryotes have a nucleus. Some researchers thought they had discovered molecular remnants of living organisms in rock samples up to 2.8 billion...
https://www.biyologlar.com/eukaryotes-a-new-timetable-of-evolution -
New DNA research reveals genetic heritage of elusive vaquita
A new method of teasing information from scarce and highly degraded genetic samples is helping NOAA Fisheries and Mexican scientists unravel the genetic heritage of the enigmatic vaquita, the most endangered marine mammal on Earth. Genetic studies are important to the international effort to conserve the vaquita because the DNA that holds their genetic code can unlock the secrets of how they came to be. For instance, it can reveal the story of how - and how long ago - the animals evolved into...
https://www.biyologlar.com/new-dna-research-reveals-genetic-heritage-of-elusive-vaquita -
New DNA research reveals genetic heritage of elusive vaquita
A new method of teasing information from scarce and highly degraded genetic samples is helping NOAA Fisheries and Mexican scientists unravel the genetic heritage of the enigmatic vaquita, the most endangered marine mammal on Earth. Genetic studies are important to the international effort to conserve the vaquita because the DNA that holds their genetic code can unlock the secrets of how they came to be. For instance, it can reveal the story of how - and how long ago - the animals evolved into...
https://www.biyologlar.com/new-dna-research-reveals-genetic-heritage-of-elusive-vaquita -
Dünya’nın Tarihi ve Önemli Doğa Olayları
Yaklaşık 4.6 milyar yaşındaki dünya bu yaşı ile görece genç bir gezegen sayılır. Dünyanın 4.6 milyar yıllık tarihini doğa tarihi anlamında düşündüğümüzde iki bölüme ayırabiliriz. Birinci bölüm dünyanın oluştuğu 4.6 milyar yıl öncesinden başlayıp Kambriyen patlaması denilen ve dünya üzerinde canlı çeşitliliğinin inanılmaz bir şekilde arttığı yaklaşık 540 milyon yıl öncesinde başlayan zaman dilimi ile sona erer. Bu dönem...
https://www.biyologlar.com/dunyanin-tarihi-ve-onemli-doga-olaylari -
EACR-Sponsored, 2nd Anticancer Agents Congress:Targeting Cancer Stem Cell
Dear Colleagues, We are happy to inform you that the EACR-sponsored “2nd Anticancer Agents Congress: Targeting Cancer Stem Cell” will take place on 21-24th November 2013, in Antalya (Turkish Riviera), Turkey. As the local organising association (MOKAD, Association for Molecular Cancer Research in Turkey), it will be a great honour and pleasure to welcome you to Antalya for this international congress. This meeting aims to bring all kinds of anti-cancer agents researchers together and...
https://www.biyologlar.com/eacr-sponsored-2nd-anticancer-agents-congresstargeting-cancer-stem-cell -
Doğa Tarihi Çalışmaları Kronolojisi
MÖ 2500-600: Babiller matematik çalışmalarına başlamışlardı. Bir çemberi 360 dereceye bölmüşler, 60 dakika ve 60 saniyeyi belirlemişlerdir. Tarımsal faaliyetlerini düzenlemek için sel baskınlarını hesaplamaya yönelik bir takvim oluşturmuş ve bir yılı 4.5 dakikalık yanılma payı ile hesaplamışlardı. MÖ 2000 e gelindiğinde arkeolojik kayıtlardan ele geçen papirüslerde Mısırlıların tedavi yöntemleri geliştirdiklerini görüyoruz....
https://www.biyologlar.com/doga-tarihi-calismalari-kronolojisi -
'Fourth strand' of European ancestry originated with hunter-gatherers isolated by Ice Age
The first sequencing of ancient genomes extracted from human remains that date back to the Late Upper Palaeolithic period over 13,000 years ago has revealed a previously unknown "fourth strand" of ancient European ancestry. This new lineage stems from populations of hunter-gatherers that split from western hunter-gatherers shortly after the 'out of Africa' expansion some 45,000 years ago and went on to settle in the Caucasus region, where southern Russia meets Georgia today. Here these...
https://www.biyologlar.com/fourth-strand-of-european-ancestry-originated-with-hunter-gatherers-isolated-by-ice-age -
Scientists report world's first herbivorous filter-feeding marine reptile
Some strange creatures cropped up in the wake of one of Earth's biggest mass extinctions 252 million years ago. In 2014, scientists discovered a bizarre fossil--a crocodile-sized sea-dwelling reptile,
https://www.biyologlar.com/scientists-report-worlds-first-herbivorous-filter-feeding-marine-reptile -
Scientists report world's first herbivorous filter-feeding marine reptile
Some strange creatures cropped up in the wake of one of Earth's biggest mass extinctions 252 million years ago. In 2014, scientists discovered a bizarre fossil--a crocodile-sized sea-dwelling reptile,
https://www.biyologlar.com/scientists-report-worlds-first-herbivorous-filter-feeding-marine-reptile -
Uluslararası Müzeler Konseyi(Icom)
Konsey1946 yılında Paris’te farklı müzelerden uzmanlar tarafından kuruldu ve başkanlığa Chauncey Hamlin getirildi. Hemen ertesi yıl ise Meksika’da ilk genel kurullarının gerçekleştirdiler. 1965 yılına kadar geçen süreçte büyümeye başlayan konsey bu süreçte yedi konferans gerçekleştirdi. Bu konferanslarında ele alınan üç temel madde; müzelerin eğitici rolleri, sergiler ve kültürel maddelerin uluslararası dolaşımı ile bu...
https://www.biyologlar.com/uluslararasi-muzeler-konseyiicom -
Kültür ve Tabiat Varlıklarını Koruma Kanunu
Kanun 21.03.1983 tarihinde kabul edilmiş olup 2863 kanun numarası ile 23.03.1983 tarihinde resmi gazetede yayınlanarak yürürlüğe girmiştir. Kanunun amacı; ‘korunması gerekli taşınır ve taşınmaz kültür ve tabiat varlıkları ile ilgili tanımları belirlemek, yapılacak işlem ve faaliyetleri düzenlemek, bu konuda gerekli ilke ve uygulama kararlarını alacak teşkilatın kuruluş ve görevlerini tespit etmek’ olarak belirlenmiştir. Kanunun kapması...
https://www.biyologlar.com/kultur-ve-tabiat-varliklarini-koruma-kanunu -
Doğa ve Canlı Hayat İçin Doğa Tarihi Müzelerinin Önemi
Adından da anlaşılacağı gibi ‘doğa’ genel anlamda doğa tarihi müzelerinin temel konusudur. Bu anlamda doğal hayatın korunması ve sürdürülebilirliği noktasında doğa tarihi müzelerine çok iş düşer. Doğal hayatın ve canlılığın korunması ve sürdürülebilirliği ancak bilinçli bir toplum oluşturma ile sağlanabilir ki bilinçli bir toplum oluşturmada müzelerin önemi büyüktür. Zira müzeler bilimsel bilgiler ışığında, insanları...
https://www.biyologlar.com/doga-ve-canli-hayat-icin-doga-tarihi-muzelerinin-onemi -
Müzelerde Eğitim
Genel anlamda müzelerde eğitimi bilimsel eğitim ve toplumsal eğitim iki başlık altında incelemek gerekse de toplumsal anlamda sağlanan eğitim daha ön plana çıkar.
https://www.biyologlar.com/muzelerde-egitim -
A key protein is discovered as essential for malaria parasite transmission to mosquitos
Two teams have independently discovered that a single regulatory protein acts as the master genetic switch that triggers the development of male and female sexual forms (termed gametocytes) of the malaria parasite, solving a long-standing mystery in parasite biology with important implications for human health. The protein, AP2-G, is necessary for activating a set of genes that initiate the development of gametocytes -- the only forms that are infectious to mosquitos. The research also gives...
https://www.biyologlar.com/a-key-protein-is-discovered-as-essential-for-malaria-parasite-transmission-to-mosquitos -
How mold on space station flowers is helping get us to Mars
When Scott Kelly tweeted a picture of moldy leaves on the current crop of zinnia flowers aboard the International Space Station, it could have looked like the science was doomed.
https://www.biyologlar.com/how-mold-on-space-station-flowers-is-helping-get-us-to-mars -
5th Congress of European Microbiologists FEMS 2013
The 5th Congress of European Microbiologists (FEMS) will be held in the interesting city of Leipzig from July 21-25, 2013. FEMS brings together 46 member societies from 36 European countries, including over thirty thousand microbiologists. This important microbiology Congress will provide an interesting forum for thousands of European and other international colleagues to appreciate the current state of the art in microbiology during numerous symposia and workshops led by prominent scientists...
https://www.biyologlar.com/5th-congress-of-european-microbiologists-fems-2013 -
Powering the Cell: Mitochondria
Together Harvard University and XVIVO developed this 3D animation journey for Harvard's undergraduate Molecular and Cellular Biology students about the microscopic world of mitochondria. The animation highlights the creation of Adenosine Triphosphate (ATP) -- mobile molecules which store chemical energy derived from the breakdown of carbon-based food. ATP molecules act as a kind of currency, imparting chemical energy to power all the functional components of cellular activity. This piece...
https://www.biyologlar.com/powering-the-cell-mitochondria -
Tracking the viral parasites cruising our waterways
Humans aren't the only ones who like to cruise along the waterways, so do viruses. For the first time, a map of fecal viruses traveling our global waterways has been created using modeling methods to aid in assessing water quality worldwide. "Many countries are at risk of serious public health hazards due to lack of basic sanitation," said Joan Rose, Homer Nowlin Chair in water research at Michigan State University. "With this map, however, we can assess where viruses are being discharged from...
https://www.biyologlar.com/tracking-the-viral-parasites-cruising-our-waterways -
NIH-funded study establishes genomic data set on Lassa virus
An international team of researchers has developed the largest genomic data set in the world on Lassa virus (LASV). The new genomic catalog contains nearly 200 viral genomes collected from patient samples in Sierra Leone and Nigeria, as well as field samples from the major animal reservoir, or host, of Lassa virus--the rodent Mastomys natalensis, also called the multimammate rat. The researchers show that LASV strains cluster into four major groups based on geographic location, with three in...
https://www.biyologlar.com/nih-funded-study-establishes-genomic-data-set-on-lassa-virus -
Genetic road map may bring about better cotton crops
A University of Texas at Austin scientist, working with an international research team, has developed the most precise sequence map yet of U.S.
https://www.biyologlar.com/genetic-road-map-may-bring-about-better-cotton-crops -
Cracking the mystery of Zika virus replication
This is the structure of the ZIKV helicase in complex with RNA.
https://www.biyologlar.com/cracking-the-mystery-of-zika-virus-replication -
Cracking the mystery of Zika virus replication
This is the structure of the ZIKV helicase in complex with RNA.
https://www.biyologlar.com/cracking-the-mystery-of-zika-virus-replication -
Bumblebee genomes create a buzz in the field of pollination
Bees play a key role in our ecosystem and in the world's food supply.
https://www.biyologlar.com/bumblebee-genomes-create-a-buzz-in-the-field-of-pollination -
Octopus genome reveals cephalopod secrets
Researchers from UC Berkeley, the Okinawa Institute of Science and Technology Graduate University and the University of Chicago have sequenced and annotated the first cephalopod genome
https://www.biyologlar.com/octopus-genome-reveals-cephalopod-secrets -
First fossil facial tumor discovered in a dwarf duck-billed dinosaur from Transylvania
The first-ever record of a tumourous facial swelling found in a fossil has been discovered in the jaw of the dwarf dinosaur Telmatosaurus transsylvanicus, a type of primitive duck-billed dinosaur known as a hadrosaur.
https://www.biyologlar.com/first-fossil-facial-tumor-discovered-in-a-dwarf-duck-billed-dinosaur-from-transylvania -
Scientists sequence first ancient Irish human genomes
Excavated near Belfast in 1855, she had lain in a Neolithic tomb chamber for 5,000 years; subsequently curated in Queens University Belfast.
https://www.biyologlar.com/scientists-sequence-first-ancient-irish-human-genomes -
Scientists sequence first ancient Irish human genomes
Excavated near Belfast in 1855, she had lain in a Neolithic tomb chamber for 5,000 years; subsequently curated in Queens University Belfast.
https://www.biyologlar.com/scientists-sequence-first-ancient-irish-human-genomes -
Sequencing of barley genome achieves new milestone
Barley is one of the world's most important cereal crops.
https://www.biyologlar.com/sequencing-of-barley-genome-achieves-new-milestone -
Sequencing of barley genome achieves new milestone
Barley is one of the world's most important cereal crops.
https://www.biyologlar.com/sequencing-of-barley-genome-achieves-new-milestone -
DNA sequencing to improve treatment of urinary infections
Urinary tract infections (UTIs) could be treated more quickly and efficiently using a DNA sequencing device the size of a USB stick -- according to research from the University of...
https://www.biyologlar.com/dna-sequencing-to-improve-treatment-of-urinary-infections -
DNA sequencing to improve treatment of urinary infections
Urinary tract infections (UTIs) could be treated more quickly and efficiently using a DNA sequencing device the size of a USB stick -- according to research from the University of...
https://www.biyologlar.com/dna-sequencing-to-improve-treatment-of-urinary-infections