Toplam 196 içerik listeleniyor
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Kültür Suşları (Maya )
Ulusal Tip Kültür Koleksiyonu Maya ve Mantar Suşları RSKK NO MİKROORGANİZMA CİNSİ KAYNAK KOD TARİH 04005 Aspergillus fumigatus RSHMB - 2004 297 Arthroderma gypseum RSHMB - 1991 483 Aspergilus niger RSHMB - 04017 Aspergillus niger RSHMB - 2004 95071 Candida...
https://www.biyologlar.com/kultur-suslari-maya- -
Primate evolution in the fast lane
The pace of evolution is typically measured in millions of years, as random, individual mutations accumulate over generations, but researchers at Cornell and Bar-Ilan Universities have uncovered a new mechanism for mutation in primates that is rapid, coordinated, and aggressive. The discovery raises questions about the accuracy of using the more typical mutation process as an estimate to date when two species diverged, as well as the extent to which this and related enzymes played a role in...
https://www.biyologlar.com/primate-evolution-in-the-fast-lane-haber-8133 -
Tough times for the tree of life on coral reefs
In terms of evolutionary history, less than a quarter of wrasse species receive minimum protection levels. 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.
https://www.biyologlar.com/tough-times-for-the-tree-of-life-on-coral-reefs-haber-8731 -
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 -
Study documents catastrophic collapse of Sahara's wildlife
A new study led by the Wildlife Conservation Society and Zoological Society or London warns that the world's largest tropical desert, the Sahara, has suffered a catastrophic collapse of its wildlife populations. The study by more than 40 authors representing 28 scientific organizations assessed 14 desert species and found that a shocking half of those are regionally extinct or confined to one percent or less of their historical range. A chronic lack of studies across the region due to past and...
https://www.biyologlar.com/study-documents-catastrophic-collapse-of-saharas-wildlife -
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 -
Türkiye kuşlar listesi
Türkiye'nin farklı iklimli bölgeleri birçok farklı kuş türünün yaşaması için elverişlidir. Yaklaşık 465 kuş türü Türkiye sınırları içinde gözlemlenebilmektedir
https://www.biyologlar.com/turkiye-kuslar-listesi -
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 -
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 -
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 -
Polymerase Chain Reaction (PCR)
Polymerase chain reaction (PCR) allows researchers to amplify DNA in a test tube. This process uses an enzyme derived from heat-resistant bacteria. The steps of PCR are driven by changes in temperature. Originally created for DNA Interactive ( http://www.dnai.org ). TRANSCRIPT: Polymerase chain reaction (PCR) is a process where many copies of a specific piece of DNA can be made. This is known as amplification. Double-stranded DNA (red) unwinds and separates when the temperature is increased....
https://www.biyologlar.com/polymerase-chain-reaction-pcr -
Stem cell breakthrough could set up future transplant therapies
A new method for creating stem cells for the human liver and pancreas, which could enable both cell types to be grown in sufficient quantities for clinical use, has been developed by scientists. Using the technique, researchers have for the first time been able to grow a pure, self-renewing population of stem cells specific to the human foregut, the upper section of the human digestive system. These so-called "Foregut stem cells" could then be developed further to produce liver or pancreatic...
https://www.biyologlar.com/stem-cell-breakthrough-could-set-up-future-transplant-therapies -
Kargagiller (Corvidae)
Göknar kargası (Nucifraga caryocatactes) Sarı gagalı dağ kargası (Pyrrhocorax graculus) Kırmızı gagalı dağ kargası (Pyrrhocorax pyrrhocorax) Bayağı alakarga (Garrulus glandarius) Avrupa saksağanı (Pica pica) Bayağı kuzgun (Corvus corax) Çöl kuzgunu (Corvus ruficollis) Küçük karga (Corvus monedula) Ekin kargası (Corvus frugilegus) Leş kargası (Corvus corone)
https://www.biyologlar.com/kargagiller-corvidae -
Botaniğin Tarihçesi
Bugünkü sistematik botanik adına yaşanan en büyük ilerlemeler, 20. yüzyılın ikinci yarısında meydana gelmiştir. O dönemlerin kötü koşulları ve maddi sıkıntılarına rağmen, dünyanın bir çok yerindeki çok sayıda flora yazarı, önemli çalışmalar başlatmış ve bu konuda büyük adımlar atmışlardır. Dünya tarihinde, bilinen ilk Flora yayınları, küçük bir alanda yetişen bitkilerin isim listesinden bile daha dar kapsamlıydı. Bugün ise, en iyi ve modern...
https://www.biyologlar.com/botanigin-tarihcesi -
Aquilegia olympica - Hasekiküpesi
Fotoğraf: Prof.Dr. Ahmet KARATAŞ
https://www.biyologlar.com/aquilegia-olympica-hasekikupesi -
Signs of deforestation in Brazil
Multiple fires are visible in in this image of the Para and Mato Grosso states of Brazil. Many of these were most likely intentionally set in order to deforest the land. Deforestation is the removal of a forest or stand of trees where the land is thereafter converted to a nonforest use. Examples of deforestation include conversion of forestland to farms, ranches, or urban use. The herringbone-patterned tan lines cutting through the dark green of the Amazon Rainforest in the middle of the image...
https://www.biyologlar.com/signs-of-deforestation-in-brazil -
ARITMA TESİSLERİ VE PROTOZOA
Çalışma metodları birbirinden farklı olsa da arıtma tesislerinin tamamı çeşitli protozoon gruplarını barındırır (Çizelge 1). Biyolojik unsurlar organik madde üzerinden beslenerek organik maddenin topaklaşmasını ve çökmesini sağlarlar. Bakteri bu maddelerin sıvı fazdan uzaklaştırılmasında rol alan en etkin organizma grubunu oluştur. Protozoonlar, atık su arıtma sistemlerinde biyolojik parçalanmadan sorumlu bakteriler üzerinden beslendiklerinden dolayı, önceleri...
https://www.biyologlar.com/aritma-tesisleri-ve-protozoa -
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 -
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 -
Logging means ants, worms and other invertebrates lose rainforest dominance
Invertebrates perform essential functions for the smooth running of the ecosystems in tropical forests. For example, creatures such as termites and millipedes help dead leaves decompose and release their nutrients back into the soil, and carnivorous ants and spiders act as predators of herbivorous invertebrates that would otherwise munch through all the foliage. Nearly a half of all tropical rainforests worldwide have been logged, and this often causes heavy changes to the number and type of...
https://www.biyologlar.com/logging-means-ants-worms-and-other-invertebrates-lose-rainforest-dominance -
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 -
Lycaena tityrus - İsli Bakır Kelebeği
Fotoğraf: Prof.Dr. Ahmet KARATAŞ
https://www.biyologlar.com/lycaena-tityrus-isli-bakir-kelebegi -
Tropikal Kelebekler
The Butterfly Conservatory: Tropical Butterflies Alive in Winter, an annual favorite visited by millions of children and adults, returns to the American Museum of Natural History. Visitors can mingle with up to 500 live butterflies among tropical flowers and vegetation. Watch as Hazel Davies, AMNH's Manager of Living Exhibits, and Whitney Doreen Ortiz walk through the vivarium and interact with butterflies from around the world -- blue morphos, striking scarlet swallowtails and large owl...
https://www.biyologlar.com/tropikal-kelebekler -
Tomares nesimachus - Akdeniz Gelinciği
Fotoğraf: Prof.Dr. Ahmet KARATAŞ
https://www.biyologlar.com/tomares-nesimachus-akdeniz-gelincigi -
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 -
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 -
Leishmania'nın yaşam döngüsü
Diğer bir parazit türü olan Leishmania köpekler aracılığı ile bulaşabilir. Bu grubun alt türü olan Leishmania donovani kalaazar (visseral leishmaniazis) hastalığının etkenidir. Diğer bir alt türü olana Leishmania tropica ise şark çıbanı etkenidir. Bu parazitler için köpekler rezervuar görevi yapar. Flebotomlar (kene ve pire) ise vektör yani taşıyıcılardır. Leishmania donovani insan vücuduna girişinden 2 yada 8 ay sonra etkisini gösterebilir. Dalağın...
https://www.biyologlar.com/leishmanianin-yasam-dongusu -
Rapid plankton growth in ocean seen as sign of carbon dioxide loading
A microscopic marine alga is thriving in the North Atlantic to an extent that defies scientific predictions, suggesting swift environmental change as a result of increased carbon dioxide in the ocean, a study led a by Johns Hopkins University scientist has found. What these findings mean remains to be seen, however, as does whether the rapid growth in the tiny plankton's population is good or bad news for the planet. Published Thursday in the journal Science, the study details a tenfold...
https://www.biyologlar.com/rapid-plankton-growth-in-ocean-seen-as-sign-of-carbon-dioxide-loading -
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 -
Researchers build molecule that could significantly reduce brain damage in stroke victims
Research teams separated by 14 hours and 9,000 miles have collaborated to advance prospective treatment for the world's second-leading cause of death. University of Nebraska-Lincoln chemists partnered with medical researchers from the National University of Singapore to develop a molecule that can inhibit an enzyme linked with the onset of stroke. Most strokes occur when a disruption of blood flow prevents oxygen and glucose from reaching brain tissue, ultimately killing neurons and other...
https://www.biyologlar.com/researchers-build-molecule-that-could-significantly-reduce-brain-damage-in-stroke-victims -
3. Kromozom
3. kromozom toplamda 22 çift olan otozomal insan kromozomlarından ondördüncüsüdür. İnsanlarda normalde bir çift halinde bulunur. 198 - 200 milyon baz çiftine ve toplam hücre DNA'sının %6.5 ine sahiptir 3. kromozom muhtemelen 1100 ile 1500 gen içermektedir. Diğer bazı kaynaklara göre bu rakam "1000" ila "1100" olarak değişmektedir. Her bir kromozomdaki genlerin belirlenmesi, aktif bir genetik araştırma alanıdır. Araştırmacılar, her kromozomdaki gen...
https://www.biyologlar.com/3-kromozom -
Mikrobiyal Biyoteknoloji Bölüm 1
Biyoteknoloji Nedir ? - Biyolojik araç, sistem ve süreçlerin üretim ve hizmet endüstrilerine uygulanması - Endüstriyel uygulamalarda başarılı olabilmek için Biyokimya, Mikrobiyoloji ve Mühendislik bilimlerinin ortak kullanımı ile mikroorganizmaların, doku ve hücre kültürlerinin kapasitelerinin artırılması - Çeşitli yararlı maddelerin üretilmesi için biyolojik özellikleri kullanan bir teknoloji olması - Biyolojik araçlar tarafından üretilen materyallerin daha...
https://www.biyologlar.com/mikrobiyal-biyoteknoloji-bolum-1 -
Scientists discover oldest plant root stem cells
Scientists at Oxford University have discovered the oldest known population of plant root stem cells in a 320 million-year-old fossil.
https://www.biyologlar.com/scientists-discover-oldest-plant-root-stem-cells -
BÖCEKLERDE BAŞ BÖLGESİ
Bas vücudun ön bölgesini olusturur. Bas normal olarak bir kapsül biçiminde olup üst kisimda sclerotize olmustur ve bu kisimda beyin bulunur. Agiz açikliginin bulundugu alt kisim ise membran yapisindadir. Basin vücudun uzun eksenine göre degisik konumlarda oldugu kabul edilir ve bu konum tarzi siniflandirmada kullanilir. En önemli 2 konum sekli sunlardir: Hypognat: Agiz parçalari asagiya dogru yönelmistir. Basi teskil eden segmentler gövdede bulunan segmentler ile benzer konumdadir....
https://www.biyologlar.com/boceklerde-bas-bolgesi -
Mauremys rivulata - Çizgili Kaplumbağa
Fotoğraf: Prof.Dr. Ahmet KARATAŞ
https://www.biyologlar.com/mauremys-rivulata-cizgili-kaplumbaga -
Gene Drive Technology: Where is the future?
Gene drive technologies may one day help alleviate the burden caused by diseases transmitted by mosquitoes and other animal vectors.
https://www.biyologlar.com/gene-drive-technology-where-is-the-future -
Gene Drive Technology: Where is the future?
Gene drive technologies may one day help alleviate the burden caused by diseases transmitted by mosquitoes and other animal vectors.
https://www.biyologlar.com/gene-drive-technology-where-is-the-future -
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 -
Palearktik Bölge
Avrupa, Afrika'da Sahra'nın kuzeyi, Asya, Himalaya'ların kuzey kısmı, Japonya, İzlanda ve Azor adaları, Kap Verde adası bu bölgenin içine girer. Bu bölgenin kendine özgü hayvanları köstebekler (Talpa), geyikler (Cervus), yaban öküzleri (Bovis), koyunlar (Ovis), keçiler (Rupicapra), narbülbülleri (Erithacus) ve saksağanlar (Pica), körfareler (Spalax), porsuklar (Meles) ve karacalar (Capreo-lus)'dır.
https://www.biyologlar.com/palearktik-bolge-1 -
Parazit yaşayan bir hücreliler
I. Şube : Sarcomastigophora I. Alt şube : Sarcodina (Amipler = Kök bacaklar) 1) Entamoeba histolytica (Amipli dizanteri) : İnsanda amipli dizanteriye sebep olur. Kistleri insana geçtikten sonra ince bağırsakta açılan kistten meydana gelen trofozoitler, kalın bağırsağa geçerler. Kalın barsak mukozada epitel hücreleri arasına girmek ya da sitolotik enzimler çıkararak mukozada derin ülserlerin oluşmasına neden olur ve kanlı ishalle kendini gösterir. *Trofozoit : Bir...
https://www.biyologlar.com/parazit-yasayan-bir-hucreliler -
Şark Çıbanı
Dünya üzerinde coğrafi dağılım gösteren hastalıklardandır. Tatarcık aracılığı ile bulaşır. Etken :Leishmania tropica adı verilen bir protozoondur. İki farklı formu vardır. İnsanda hareketsiz formu ile hastalık yapar. Ancak vektörü olan tatacıklarda kamçı ile hareket eden formu gelişir. Epidemiyoloji :Leishmania türleri ile 3 tip hastalık oluşabilir. Bunlar iç organ tutulumları ile seyreden kala-azar, deriyi tutan şark çıbanı ve mukozaları tutan...
https://www.biyologlar.com/sark-cibani -
Alert to biologists: Ribosomes can translate the 'untranslated region' of messenger RNA
In what appears to be an unexpected challenge to a long-accepted fact of biology, Johns Hopkins researchers say they have found that ribosomes -- the molecular machines in all cells that build proteins -- can sometimes do so even within the so-called untranslated regions of the ribbons of genetic material known as messenger RNA (mRNA). "This is an exciting find that generates a whole new set of questions for researchers," says Rachel Green, Ph.D., a Howard Hughes Medical Institute investigator...
https://www.biyologlar.com/alert-to-biologists-ribosomes-can-translate-the-untranslated-region-of-messenger-rna -
More tomatoes, faster: Accelerating tomato engineering
A researcher transfers tomato plantlets from a plate of regeneration medium.
https://www.biyologlar.com/more-tomatoes-faster-accelerating-tomato-engineering -
More tomatoes, faster: Accelerating tomato engineering
A researcher transfers tomato plantlets from a plate of regeneration medium.
https://www.biyologlar.com/more-tomatoes-faster-accelerating-tomato-engineering -
ENDEMİZM
Bir bitkinin yayılış aşanına o bitkinin “areali” denir. Yayılış alanı geniş olan bitkiye “Kozmopolit”, dar olana yani yer yüzünün belirli ve dar bir bölgesinde doğal olarak yetişen bitkiye de “Endemik” bitki denir. Endemik Yunanca Endos-yerlikelimesinden gelir. Buna göre Endemizm: Bir bitki, türünün dar bir bölgede sınırlanmış halde bulunmasıdır. Yani bu deyim, belirli bir bölgeye veya ülkeye özgü bitki taksonu (Subsp. Species, Genus, Familya gibi)...
https://www.biyologlar.com/endemizm -
Pneumonia -Streptococcal Pneumonia
Pneumonia -Streptococcal Pneumonia The video will desribe what happens microcopically in streptococcal pneumonia. Please see my website for disclaimer.
https://www.biyologlar.com/pneumonia-streptococcal-pneumonia -
Discovery of a salamander in amber sheds light on evolution of Caribbean islands
More than 20 million years ago, a short struggle took place in what is now the Dominican Republic, resulting in one animal getting its leg bitten off by a predator just before it escaped. But in the confusion, it fell into a gooey resin deposit, to be fossilized and entombed forever in amber. The fossil record of that event has revealed something not known before - that salamanders once lived on an island in the Caribbean Sea. Today, they are nowhere to be found in the entire Caribbean...
https://www.biyologlar.com/discovery-of-a-salamander-in-amber-sheds-light-on-evolution-of-caribbean-islands -
Tail as old as time -- researchers trace ankylosaur's tail evolution
How did the ankylosaur get its tail club? According to research from North Carolina State University and the North Carolina Museum of Natural Sciences that traces the evolution of the ankylosaur's distinctive tail, the handle arrived first on the scene, and the knot at the end of the tail followed. The typical ankylosaur had a wide armored body and a flexible tail. But one group of ankylosaurs - ankylosaurids - also had a tail club that could have served as a useful weapon. These "weaponized"...
https://www.biyologlar.com/tail-as-old-as-time-researchers-trace-ankylosaurs-tail-evolution