Toplam 124 içerik listeleniyor
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Bitkinin Yüksek Tuzluluktaki Yaşam Mücadelesi : Bitki Hücre Duvarının Algı Mekanizması
Model bitki Arabidopsiste bulunan çok yönlü reseptör kinaz FERONIA’nın yeni keşfedilen rolü.
https://www.biyologlar.com/bitkinin-yuksek-tuzluluktaki-yasam-mucadelesi-bitki-hucre-duvarinin-algi-mekanizmasi -
Bitkinin Yüksek Tuzluluktaki Yaşam Mücadelesi : Bitki Hücre Duvarının Algı Mekanizması
Model bitki Arabidopsiste bulunan çok yönlü reseptör kinaz FERONIA’nın yeni keşfedilen rolü.
https://www.biyologlar.com/bitkinin-yuksek-tuzluluktaki-yasam-mucadelesi-bitki-hucre-duvarinin-algi-mekanizmasi -
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 -
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 -
Stanford researchers genetically engineer yeast to produce opioids
For thousands of years, people have used yeast to ferment wine, brew beer and leaven bread. Now researchers at Stanford have genetically engineered yeast to make painkilling medicines, a breakthrough that heralds a faster and potentially less expensive way to produce many different types of plant-based medicines. Writing today in Science, the Stanford engineers describe how they reprogrammed the genetic machinery of baker's yeast so that these fast-growing cells could convert sugar into...
https://www.biyologlar.com/stanford-researchers-genetically-engineer-yeast-to-produce-opioids -
Researchers use human stem cells to create light-sensitive retina in a dish
Using a type of human stem cell, Johns Hopkins researchers say they have created a three-dimensional complement of human retinal tissue in the laboratory, which notably includes functioning photoreceptor cells capable of responding to light, the first step in the process of converting it into visual images.
https://www.biyologlar.com/researchers-use-human-stem-cells-to-create-light-sensitive-retina-in-a-dish -
The Role of Insulin in the Human Body
Developed and produced by http://www.MechanismsinMedicine.com Animation Description: This patient-friendly animation describes the main role of insulin in the human body. When food is ingested, it travels along the digestive tract where it is broken down into its component nutrients in order to be absorbed into the bloodstream. One such nutrient is glucose, a simple sugar. Glucose gets absorbed by the stomach and intestines and then enters the bloodstream. It travels through the circulation...
https://www.biyologlar.com/the-role-of-insulin-in-the-human-body -
Epigenetic signatures that differentiate triple-negative breast cancers
The new study, published in Nature Communications, compares the breast cancer DNA 'methylome' with that of healthy individuals. The methylome provides a new picture of the genome and shows how it is epigenetically 'decorated' with methyl groups, a process known as DNA 'methylation'.
https://www.biyologlar.com/epigenetic-signatures-that-differentiate-triple-negative-breast-cancers -
Cestoda (YASSI SOLUCANLAR) Özellikleri
CESTODA (YASSI SOLUCANLAR) - Sestodlar; vücutları yassı, halkalara ayrılmış şerit şeklindeki PLATHYHELMINTH'lerdir. - Boyları 2-4 mmden 20-25 mye kadar varan değişik ölçülerde olabilir.(Diphylobotrium latum 20-25 m. , Taenia saginata 5-10m. ) - Halka sayısı ise 3'ten 8-10bine kadar çok farklı sayılarda olabilir. (D.latum 8-10 bin halka, E.granulosus 3 halka) Cestodlarda vücut, şekil ve fonksiyon yönünden 3'e ayrılır: SCOLEX:Ön uçta bulunur. Yuvarlak / badem...
https://www.biyologlar.com/cestoda-yassi-solucanlar-ozellikleri -
Restoring vision with stem cells
Age-related macular degeneration (AMRD) could be treated by transplanting photoreceptors produced by the directed differentiation of stem cells, thanks to findings published today by Professor Gilbert Bernier of the University of Montreal and its affiliated Maisonneuve-Rosemont Hospital. ARMD is a common eye problem caused by the loss of cones. Bernier's team has developed a highly effective in vitro technique for producing light sensitive retina cells from human embryonic stem cells. "Our...
https://www.biyologlar.com/restoring-vision-with-stem-cells -
Insecta (Hexapoda, Entoma, Böcekler) Sınıfı
Insecta (Hexapoda, Entoma, Böcekler) Sınıfı Bu sınıf böcekleri yani haşareleri içerir. Erişkinlerde vücut belirgin olarak 3 bölüme ayrılmıştır. Bunlar baş, göğüs ve abdomendir. Başta bir çift anten vardır ve göğüs 3 segmentden oluşmuştur. Bu halkaların her birinden birer çift ayak çıkar. Bazı türlerde ise thoraxdan bir veya iki çift kanat çıkar. Abdomen ise değişik sayıda segmentlerden oluşmuştur. Baş (Capot) : Oval veya küremsi yapıdadır....
https://www.biyologlar.com/insecta-hexapoda-entoma-bocekler-sinifi -
Neurons constantly rewrite their DNA
Johns Hopkins scientists have discovered that neurons are risk takers: They use minor "DNA surgeries" to toggle their activity levels all day, every day. Since these activity levels are important in learning, memory and brain disorders, the researchers think their finding will shed light on a range of important questions. A summary of the study will be published online in the journal Nature Neuroscience on April 27. "We used to think that once a cell reaches full maturation, its DNA is totally...
https://www.biyologlar.com/neurons-constantly-rewrite-their-dna -
Nematoda
Vücutları silindirik yapıda ve segmentsizdir. Bir kısmı serbest, bir kısmı ile simbiyotik olarak yaşar. MORFOLOJİK VE FİZYOLOJİK ÖZELLİKLERİErişkinlerde; dişiler genellikle erkeklerden daha büyük ve her iki uçları sivridir. Erkeklerin ise ön ucu sivridir. Arka tarafta kutikulanın şemsiye şeklinde genişlemesinden oluşan yapı bursa copulatrix tir. Bazı erkeklerde ise kuyruk kanatları denilen kutikula genişlemeleri yer alır. Vücutları renksiz ve saydam olan...
https://www.biyologlar.com/nematoda -
How an RNA gene silences a whole chromosome
Researchers at Caltech have discovered how an abundant class of RNA genes, called long non-coding RNAs (lncRNAs, pronounced link RNAs) can regulate key genes. By studying an important lncRNA, called Xist, the scientists identified how this RNA gathers a group of proteins and ultimately prevents women from having an extra functional X-chromosome--a condition in female embryos that leads to death in early development. These findings mark the first time that researchers have uncovered the detailed...
https://www.biyologlar.com/how-an-rna-gene-silences-a-whole-chromosome -
Discovery of an unexpected function of a protein linked to neurodegenerative diseases
Until today, the proteins known as ubiquitin receptors have been associated mainly with protein degradation, a basic cell cleaning process. A new function now described for the protein dDsk2 by the team headed by Ferran Azorín, group leader at the Institute for Research in Biomedicine (IRB Barcelona) and CSIC research professor, links ubiquitin receptors for the first time with the regulation of gene expression. This discovery, published today in Nature Communications, opens up a double...
https://www.biyologlar.com/discovery-of-an-unexpected-function-of-a-protein-linked-to-neurodegenerative-diseases -
Discovery of an unexpected function of a protein linked to neurodegenerative diseases
Until today, the proteins known as ubiquitin receptors have been associated mainly with protein degradation, a basic cell cleaning process. A new function now described for the protein dDsk2 by the team headed by Ferran Azorín, group leader at the Institute for Research in Biomedicine (IRB Barcelona) and CSIC research professor, links ubiquitin receptors for the first time with the regulation of gene expression. This discovery, published today in Nature Communications, opens up a double...
https://www.biyologlar.com/discovery-of-an-unexpected-function-of-a-protein-linked-to-neurodegenerative-diseases -
12th INTERNATIONAL CONGRESS ON THE ZOOGEOGRAPHY AND ECOLOGY OF GREECE AND ADJACENT REGIONS (12. Uluslararası Zoocoğrafya ve Ekoloji Kongresi )
Dear Colleagues, It is a great honour for the Organizing Committee, to invite any professional or student who shares our mutual interest in Zoology to the 12th International Congress on the Zoogeography and Ecology of Greece and Adjacent Regions to be held in Athens, Greece, from June 18 to 22, 2012. The congress' scope includes all issues related to the animal systematics, ecology, phylogeny, phylogeography, and population genetics in Southeastern Europe and the eastern Mediterranean region....
https://www.biyologlar.com/12th-international-congress-on-the-zoogeography-and-ecology-of-greece-and-adjacent-regions-12-uluslararasi-zoocografya-ve-ekoloji-kongresi- -
Kızılırmağa arıtılmış su
Sivas Belediyesi tarafından yapımına 2007 yılında başlanan atık su arıtma tesisi cuma günü Başbakan Recep Tayyip Erdoğan tarafından hizmete açılacak. Yaklaşık 78 bin 500 metreküp günlük debiye ve 345 bin nüfusa göre yapılan tesis, Kızılırmak ın kirletilmemesi, atık suyun arıtılarak nehre verilmesi açısından önem taşıyor. Tesis, Sivas-Ankara kara yolundaki çimento fabrikası ile Kızılırmak Nehri arasında uzun havalandırmalı aktif çamur sistemi olarak...
https://www.biyologlar.com/kizilirmaga-aritilmis-su -
Tabiatı ve Biyolojik Çeşitliliği Koruma Kanunu
Tabiatı ve Biyolojik Çeşitliliği Koruma Kanunu Tasarısı Hazırlık Süreci İle Alakalı Basın Açıklaması 29.10.10 Tabiatı ve Biyolojik Çeşitliliği Koruma Kanunu Tasarısının üzerinde 2002 yılından bu yana çalışılmakta olup, konuyla alakalı olarak 6 Ocak 2003 tarihinde GEF-II Projesi çerçevesinde ilgili Bakanlıklar, kurum ve kuruluşlar, sivil toplum kuruluşları ile üniversitelerin yer aldığı Yasal Çerçeve Değerlendirme Komitesi oluşturulmuştur. Söz...
https://www.biyologlar.com/tabiati-ve-biyolojik-cesitliligi-koruma-kanunu -
A microtubule 'roadway' in the retina helps provide energy for vision
Researchers have discovered a thick band of microtubules in certain neurons in the retina that they believe acts as a transport road for mitochondria that help provide energy required for visual processing. The findings appear in the July issue of The Journal of General Physiology. The retina is a layer of tissue in the back of the eye that converts light into nerve impulses. The retina contains small, specialized neurons called bipolar cells that transmit information from light-sensitive...
https://www.biyologlar.com/a-microtubule-roadway-in-the-retina-helps-provide-energy-for-vision -
Clues contained in ancient brain point to the origin of heads in early animals
A new study from the University of Cambridge has identified one of the oldest fossil brains ever discovered - more than 500 million years old - and used it to help determine how heads first evolved in early animals. The results, published today (7 May) in the journal Current Biology, identify a key point in the evolutionary transition from soft to hard bodies in early ancestors of arthropods, the group that contains modern insects, crustaceans and spiders. The study looked at two types of...
https://www.biyologlar.com/clues-contained-in-ancient-brain-point-to-the-origin-of-heads-in-early-animals -
Hybrid cells cause chaos around cancers
Rice University researchers have built a simulation to show how cancerous tumors manipulate blood-vessel growth for their own benefit. Like all cells, those in tumors need access to the body's fine network of blood vessels to bring them oxygen and carry away waste. Tumors have learned to game the process called angiogenesis in which new vessels sprout from existing ones, like branches from a tree. But some details have been hidden until now. The ability to stop tumors through...
https://www.biyologlar.com/hybrid-cells-cause-chaos-around-cancers -
Deciphering the olfactory receptor code
In animals, numerous behaviors are governed by the olfactory perception of their surrounding world. Whether originating in the nose of a mammal or the antennas of an insect, perception results from the combined activation of multiple receptors located in these organs. Identifying the full repertoire of receptors stimulated by a given odorant would represent a key step in deciphering the code that mediates these behaviors. To this end, a tool that provides a complete olfactory receptor signature...
https://www.biyologlar.com/deciphering-the-olfactory-receptor-code -
Doğu Karadeniz Kuşları Kitabı Tanıtım Etkinliği
Doğu Karadeniz Kuşları kitabı tanıtım etkinliğine katılan bütün arkadaşlarımıza ,özellikle Prof Dr Ahmet Karataş ve Araklı Belediye başkanı Recep Çebi ye sonsuz teşekkür ederiz.
https://www.biyologlar.com/dogu-karadeniz-kuslari-kitabi-tanitim-etkinligi -
T cells use 'handshakes' to sort friends from foes
T cells, the security guards of the immune system, use a kind of mechanical "handshake" to test whether a cell they encounter is a friend or foe, a new study finds.
https://www.biyologlar.com/t-cells-use-handshakes-to-sort-friends-from-foes -
T cells use 'handshakes' to sort friends from foes
T cells, the security guards of the immune system, use a kind of mechanical "handshake" to test whether a cell they encounter is a friend or foe, a new study finds.
https://www.biyologlar.com/t-cells-use-handshakes-to-sort-friends-from-foes -
Metazoa’ nın Yapı Planı ve Ortaya Çıkışı
Çok hücreli hayvanlarda hücreler görecekleri işe göre farklılaşarak dokuları, dokuların bir araya gelmeleri ile de belli bir işi yapmaktan sorumlu organlar oluşur Bu da hayvan gruplarında farklı yapı planlarının ortaya çıkmasına neden olur. Yapı planları her hayvan grubunda farklı olmasına karşın belli hayvanları bünyesinde barındıran hayvan gruplarında ise temel bir yapı vardır Bu filum içine giren hayvan alt kategorilerinde yapı, bu ana yapıdan az farklar...
https://www.biyologlar.com/metazoa-nin-yapi-plani-ve-ortaya-cikisi -
Scientists learn more about how star-shaped brain cells help us learn
A molecule that enables strong communication between our brain and muscles appears to also aid essential communication between our neurons, scientists report.
https://www.biyologlar.com/scientists-learn-more-about-how-star-shaped-brain-cells-help-us-learn -
The importance of keeping silent...in breast cancer cells
Immunofluorescent breast cancer cells used in this study.
https://www.biyologlar.com/the-importance-of-keeping-silent-in-breast-cancer-cells -
The importance of keeping silent...in breast cancer cells
Immunofluorescent breast cancer cells used in this study.
https://www.biyologlar.com/the-importance-of-keeping-silent-in-breast-cancer-cells -
Viruses revealed to be a major driver of human evolution
Aminopeptidase N is a protein that acts as a receptor for coronaviruses, the family of viruses behind recent epidemics of SARS and MERS, among others.
https://www.biyologlar.com/viruses-revealed-to-be-a-major-driver-of-human-evolution -
Viruses revealed to be a major driver of human evolution
Aminopeptidase N is a protein that acts as a receptor for coronaviruses, the family of viruses behind recent epidemics of SARS and MERS, among others.
https://www.biyologlar.com/viruses-revealed-to-be-a-major-driver-of-human-evolution -
Ant antennae provide vital ID information: Study
University of Melbourne scientists have shone a new light into the complexities of ant communication, with the discovery that ants not only pick up information through their antennae, but also use them to convey social signals. It is believed to be the first time antennae have been found to be a two-way communication device, rather than just a receptor. Biologists from the University's School of BioSciences analysed the behaviour and surface chemistry of hundreds of ants to examine how they...
https://www.biyologlar.com/ant-antennae-provide-vital-id-information-study -
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 -
TSRI researchers find 'lead actors' in immune cell development
Authors of the new paper include (left to right) Changchun Xiao, David Nemazee, Alicia Gonzalez Martin and Maoyi Lai of The Scripps Research Institute
https://www.biyologlar.com/tsri-researchers-find-lead-actors-in-immune-cell-development -
Sıtma biyolojisi ve epidemiyolojisi
Sıtmanın özellikle epidemiyolojik özellikleri ile ilgili Türkçe basılmış ülkemizdeki en yeni ve bize göre en iyi derlenmiş kaynak Prof. Dr. Recep Akdur'un 1997 yılında yayınladığı "Sıtma Eğitim Notları" isimli kitaptır. Bundan dolayı, daha çok sıtma vektörünün ekolojisi ve mücadelesi temeline oturtulan kitabımızda, bu konuyla ilgili gereğinden fazla ayrıntıya girmeyeceğiz. İnsan sıtma parazitinin, sivrisinek vücudunda ve insan vücudunda geçen ayrı ayrı...
https://www.biyologlar.com/sitma-biyolojisi-ve-epidemiyolojisi -
Scientific serendipity yields new neuron type in mouse retina
3-D reconstruction of a GluMI cell at the ultrastructural level showing its input (magenta puncta) and output (yellow puncta) obtained using serial block face scanning electron microscopy
https://www.biyologlar.com/scientific-serendipity-yields-new-neuron-type-in-mouse-retina -
Scientific serendipity yields new neuron type in mouse retina
3-D reconstruction of a GluMI cell at the ultrastructural level showing its input (magenta puncta) and output (yellow puncta) obtained using serial block face scanning electron microscopy
https://www.biyologlar.com/scientific-serendipity-yields-new-neuron-type-in-mouse-retina -
Neuron unites 2 theoretical models on motion detection
As indicated by their name, photoreceptor cells in the eye respond to light: is an image point bright or dark? They do not indicate the direction of a movement.
https://www.biyologlar.com/neuron-unites-2-theoretical-models-on-motion-detection -
Intestinal worms 'talk' to gut bacteria to boost immune system
EPFL researchers have discovered how intestinal worm infections cross-talk with gut bacteria to help the immune system. Intestinal worms infect over 2 billion people across the world, mostly children, in areas with poor sanitation. But despite causing serious health problems, worms can actually help the immune system of its host as an indirect way of protecting themselves. The evidence for this is so strong that we are now testing worms for clinical benefits. However, very little is known...
https://www.biyologlar.com/intestinal-worms-talk-to-gut-bacteria-to-boost-immune-system -
Researchers map Zika's routes to the developing fetus
Zika virus infects numerous primary cell types and explants of the human placenta, suggesting placental and paraplacental routes of virus transmission.
https://www.biyologlar.com/researchers-map-zikas-routes-to-the-developing-fetus -
Researchers map Zika's routes to the developing fetus
Zika virus infects numerous primary cell types and explants of the human placenta, suggesting placental and paraplacental routes of virus transmission.
https://www.biyologlar.com/researchers-map-zikas-routes-to-the-developing-fetus -
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 -
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 -
Genes influence choice between small rewards now or bigger ones later
"Would you rather have $20 now, or can I mail you $40 in a few weeks? "
https://www.biyologlar.com/genes-influence-choice-between-small-rewards-now-or-bigger-ones-later -
Genome of bed bug decoded
These bloodsuckers originally parasitized bats.
https://www.biyologlar.com/genome-of-bed-bug-decoded -
Genome of bed bug decoded
These bloodsuckers originally parasitized bats.
https://www.biyologlar.com/genome-of-bed-bug-decoded -
Tüp Bebekte Başarıyı Artıran Test: ERA
Rahimin embriyoyu kabul edeceği en uygun zamanı belirleyen çok ileri bir genetik test olan ERA (Endometrium Receptivity Assay) tüp bebekteki başarıyı da artıyor. Acıbadem Tüp Bebek Merkezleri Koordinatörü Kadın Hastalıkları ve Doğum Uzmanı Prof. Dr. Bülent Tıraş, “Bu testle rahimden alınan 238 gen inceleniyor. ERA tekrarlayan başarısızlıkları yüzde 27 -30 başarıya dönüştüren yeni bir testtir” dedi.İnfertil çiftlerin sayısı toplumlarda artış...
https://www.biyologlar.com/tup-bebekte-basariyi-artiran-test-era -
The corn snake genome sequenced for the first time
Wild-type corn snakes typically exhibit, over a light orange background coloration, a pattern of dark orange dorsal saddles and lateral blotches that are outlined with black
https://www.biyologlar.com/the-corn-snake-genome-sequenced-for-the-first-time