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Cells are crawling all over our bodies, but how?

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.

http://www.biyologlar.com/cells-are-crawling-all-over-our-bodies-but-how

Scientists measure the 'beauty' of coral reefs

Scientists measure the 'beauty' of coral reefs

This is an example of a healthy reef. Almost every person has an appreciation for natural environments. In addition, most people find healthy or pristine locations with high biodiversity more beautiful and aesthetically pleasing than environmentally degraded locations. In a study which computed 'aesthetics' as it relates to coral reefs, a multidisciplinary group of researchers have shown that an objective computational analysis of photographic images can be used to assess the health of a coral...

http://www.biyologlar.com/scientists-measure-the-aposbeauty-apos-of-coral-reefs-haber-8733

Kongo Nehri Balıklarının Hızlı Evrimi

Kongo Nehri Balıklarının Hızlı Evrimi

Fotoğrafta bir çift akvaryum çiklet balığı türü olan Telegramma brichardi bulunmaktadır. Fotoğraf:Oliver Lucanus

http://www.biyologlar.com/kongo-nehri-baliklarinin-hizli-evrimi

Cell stress inflames the gut

Cell stress inflames the gut

Over 3.5 million people in Europe and the US suffer from Crohn's disease or ulcerative colitis – the two most common forms of IBD. Chronic bowel inflammation is caused by an overreaction of the immune system to the bacteria which naturally occur in the gut. "This overreaction can come about if, for example, the anti-stress mechanism in the cells of the intestinal mucosa does not function correctly," explains Prof. Dirk Haller of the TUM Chair of Nutrition and Immunology. What Prof. Haller is...

http://www.biyologlar.com/cell-stress-inflames-the-gut

Highly efficient CRISPR knock-in in mouse

Highly efficient CRISPR knock-in in mouse

Genome editing using CRISPR/Cas system has enabled direct modification of the mouse genome in fertilized mouse eggs, leading to rapid, convenient, and efficient one-step production of knockout mice without embryonic stem cells. In contrast to the ease of targeted gene deletion, the complementary application, called targeted gene cassette insertion or knock-in, in fertilized mouse eggs by CRISPR/Cas mediated genome editing still remains a tough challenge. Professor Kohichi Tanaka and Dr. Tomomi...

http://www.biyologlar.com/highly-efficient-crispr-knock-in-in-mouse

SİSTEMATİĞİN TARİHÇESİ

Bugün yaşayan en geri insan topluluklarında dahi çevrelerindeki canlılara isimler verildiği görülür. Hayvanların ve bitkilerin tanınmasıyla insanların ilk ilgisi tarih öncesi devirlerde başlar. Akdeniz çevresinde bulunan mağaralarda ilkçağ insanlarının çizdiği hayvan ve bitki resimleri bunun en belirgin kanıtıdır. İlk çağlarda insanlar bitkileri yenen, yenmeyen, zehirli, zehirsiz gibi kullandıkları biçime göre sınıflandırmışlardır. Daha sonra bu...

http://www.biyologlar.com/sistematigin-tarihcesi

Coral reefs in Palau surprisingly resistant to <b class=red>natural</b>ly acidified waters

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...

http://www.biyologlar.com/coral-reefs-in-palau-surprisingly-resistant-to-naturally-acidified-waters

One of the last strongholds for Western chimpanzees

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...

http://www.biyologlar.com/one-of-the-last-strongholds-for-western-chimpanzees

Small molecule acts as on-off switch for nature's antibiotic factory

Small molecule acts as on-off switch for nature's antibiotic factory

Scientists have identified the developmental on-off switch for Streptomyces, a group of soil microbes that produce more than two-thirds of the world's naturally derived antibiotic medicines. Their hope now would be to see whether it is possible to manipulate this switch to make nature's antibiotic factory more efficient. The study, appearing August 28 in Cell, found that a unique interaction between a small molecule called cyclic-di-GMP and a larger protein called BldD ultimately controls...

http://www.biyologlar.com/small-molecule-acts-as-on-off-switch-for-natures-antibiotic-factory

Stanford researchers genetically engineer yeast to produce opioids

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...

http://www.biyologlar.com/stanford-researchers-genetically-engineer-yeast-to-produce-opioids

Firefly protein enables visualization of roots in soil

Firefly protein enables visualization of roots in soil

Plants form a vast network of below-ground roots that search soil for needed resources. The structure and function of this root network can be highly adapted to particular environments such as desert soils where plants like Mesquite develop tap roots capable of digging 50 meters deep to capture precious water resources. Excavation of root systems reveals these kinds of adaptations but is laborious, time consuming, and does not provide information on how growing roots behave. A new imaging tool...

http://www.biyologlar.com/firefly-protein-enables-visualization-of-roots-in-soil

HİSTOLOJİDE KULLANILAN BOYALARIN SINIFLANDIRMASI VE STANDARDİZASYONU

Histolojide kullanılan boyaların büyük bölümü 3 temel chromoforik gruptan (quino-noid halka, azo-grup veya nitro grup) tan birine dahildir. Quinonoid boyalar çok geniş ve önemli bir gruptur ve quinonoid yapının özel tiplerine bakılarak alt gruplara ayrılırlar.Histolojide boyalar ya boyaların uygulama tarzlarına bakılarak direkt veya mordant boya; ya da genel kimyasal özelliğine bakılarak asit veya bazik boya olarak sınıflarıdırılırlar. Bazı boyalar light green...

http://www.biyologlar.com/histolojide-kullanilan-boyalarin-siniflandirmasi-ve-standardizasyonu-1

Signs of deforestation in Brazil

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...

http://www.biyologlar.com/signs-of-deforestation-in-brazil

Logging means ants, worms and other invertebrates lose rainforest dominance

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...

http://www.biyologlar.com/logging-means-ants-worms-and-other-invertebrates-lose-rainforest-dominance

Snake venom helps hydrogels stop the bleeding

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...

http://www.biyologlar.com/snake-venom-helps-hydrogels-stop-the-bleeding

Scientists develop mesh that captures oil -- but lets water through

Scientists develop mesh that captures oil -- but lets water through

The unassuming piece of stainless steel mesh in a lab at The Ohio State University doesn't look like a very big deal, but it could make a big difference for future environmental cleanups. Water passes through the mesh but oil doesn't, thanks to a nearly invisible oil-repelling coating on its surface. In tests, researchers mixed water with oil and poured the mixture onto the mesh. The water filtered through the mesh to land in a beaker below. The oil collected on top of the mesh, and rolled...

http://www.biyologlar.com/scientists-develop-mesh-that-captures-oil-but-lets-water-through

Wheat disease-resistance gene identified, potential to save billions

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...

http://www.biyologlar.com/wheat-disease-resistance-gene-identified-potential-to-save-billions

Darwin Neyi Öğretti

Darwin Türlerin Kökeni`ni yazdığı sıralarda insanlar, yeryüzünün ve canlıların geçmişte nasıl yaratılmışlarsa aynı biçimde hiç değişmeden var olmaya devam ettiklerine inanıyorlardı. Yüce bir irade dünyaya `ol` demişti ve o, en tamam haliyle oluvermişti. Bu değişmez doğa inancı insanlığı 19. yüzyıla kadar idare etti. Sonra Darwin`in kitabı çıktı ortaya. Tam da büyük altüst oluşlarla insanlığın makus talihinin değişmeye başladığı dönemdi. Ve...

http://www.biyologlar.com/darwin-neyi-ogretti

Ant Art Mine-Kyle Lyons

Ant Art Mine-Kyle Lyons

Stop motion AV video loop of ants in thier natural habitat. Shot in the mountains of Benicassim, Spain. Audio courtesy of Glimmertitz. glimmertitz.com Looking for free audio visual loops and vj stock footage visit vjvault.com

http://www.biyologlar.com/ant-art-mine-kyle-lyons

İnsan papilloma virüsü

İnsan papilloma virüsü, insan papilloma virüs ya da human papilloma virus (HPV veya İPV) papillomavirus ailesine mensup, deri ve mukozal yüzeylerdeki bazal epitelyal tabaka hücrelerini enfekte eden bir DNA virusu. 1970'li yıllarla beraber HPV ve kanser ilişkisi üzerinde çalışmalar başlamış ve pozitif bulgularla beraber günümüzde önemli bir bilgi birikimi elde edilmiştir[1]. Şimdiye dek 100'den fazla HPV tipi saptanmıştır[2]. HPV; serviks, penis, vulva, vajina, anüs,...

http://www.biyologlar.com/insan-papilloma-virusu

Tropikal Kelebekler

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...

http://www.biyologlar.com/tropikal-kelebekler

Restoring vision with stem cells

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...

http://www.biyologlar.com/restoring-vision-with-stem-cells

How an RNA gene silences a whole chromosome

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...

http://www.biyologlar.com/how-an-rna-gene-silences-a-whole-chromosome

Shiny fish skin inspires nanoscale light reflectors

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...

http://www.biyologlar.com/shiny-fish-skin-inspires-nanoscale-light-reflectors

Tough times for the tree of life on coral reefs

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...

http://www.biyologlar.com/tough-times-for-the-tree-of-life-on-coral-reefs

Herpes outbreak, other marine viruses linked to coral bleaching event

Herpes outbreak, other marine viruses linked to coral bleaching event

A study at Oregon State University has concluded that significant outbreaks of viruses may be associated with coral bleaching events, especially as a result of multiple environmental stresses. One such event was documented even as it happened in a three-day period. It showed how an explosion of three viral groups, including a herpes-like virus, occurred just as corals were bleaching in one part of the Great Barrier Reef off the east coast of Australia. The findings, reported in Frontiers in...

http://www.biyologlar.com/herpes-outbreak-other-marine-viruses-linked-to-coral-bleaching-event

Researchers build molecule that could significantly reduce brain damage in stroke victims

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...

http://www.biyologlar.com/researchers-build-molecule-that-could-significantly-reduce-brain-damage-in-stroke-victims

West Coast scientists sound alarm for changing ocean chemistry

West Coast scientists sound alarm for changing ocean chemistry

The ocean chemistry along the West Coast of North America is changing rapidly because of global carbon dioxide emissions, and the governments of Oregon, California, Washington and British Columbia can take actions now to offset and mitigate the effects of these changes. That is the conclusion of a 20-member panel of leading West Coast ocean scientists, who presented a comprehensive report on Monday outlining a series of recommendations to address the increase in ocean acidification and...

http://www.biyologlar.com/west-coast-scientists-sound-alarm-for-changing-ocean-chemistry

Perfecting a viral pack mule

Perfecting a viral pack mule

Viruses aren't always bad. In fact, scientists can harness the capabilities of some viruses for good--modifying the viruses to carry drug molecules, for example. One useful virus has been cowpea mosaic virus (CPMV), a plant pathogen that can be modified to aid in tumor detection and even chemotherapy. In a new study, published online ahead of print in the journal Structure, researchers at The Scripps Research Institute (TSRI) report that, based on its structure, a hollowed-out version of CPMV...

http://www.biyologlar.com/perfecting-a-viral-pack-mule

Spider and centipede venom evolved from insulin-like hormone

Spider and centipede venom evolved from insulin-like hormone

Funnel-web spider venom contains powerful neurotoxins that instantly paralyze prey (usually insects). Millions of years ago, however, this potent poison was just a hormone that helped ancestors of these spiders regulate sugar metabolism, similar to the role of insulin in humans. Surprisingly, this hormone's weaponization--described on June 11 in the journal Structure--occurred in arachnids as well as centipedes, but in different ways. Researchers at the University of Queensland in Australia...

http://www.biyologlar.com/spider-and-centipede-venom-evolved-from-insulin-like-hormone

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...

http://www.biyologlar.com/turkiye-zootekni-bolumlerinde-hayvan-davranislari-bilimi

Tiny genetic tweak unlocked corn kernels during domestication

Tiny genetic tweak unlocked corn kernels during domestication

If not for a single genetic mutation, each kernel on a juicy corn cob would be trapped inside a inedible casing as tough as a walnut shell. The mutation switches one amino acid for another at a specific position in a protein regulating formation of these shells in modern corn's wild ancestor, according to a study published in the July 2015 issue of GENETICS, a publication of the Genetics Society of America. "Humans completely reshaped the ancestor of corn, effectively turning the cob inside...

http://www.biyologlar.com/tiny-genetic-tweak-unlocked-corn-kernels-during-domestication


How a single molecule turns one immune cell into another

How a single molecule turns one immune cell into another

All it takes is one molecule to reprogram an antibody-producing B cell into a scavenging macrophage. This transformation is possible, new evidence shows, because the molecule (C/EBPa, a transcription factor) "short-circuits" the cells so that they re-express genes reserved for embryonic development. The findings appear July 30 in Stem Cell Reports, the journal of the International Society for Stem Cell Research. Over the past 28 years, researchers have shown that a number of specialized cell...

http://www.biyologlar.com/how-a-single-molecule-turns-one-immune-cell-into-another

Legions of nanorobots target cancerous tumors with precision

Legions of nanorobots target cancerous tumors with precision

The legions of nanorobotic agents are actually composed of more than 100 million flagellated bacteria

http://www.biyologlar.com/legions-of-nanorobots-target-cancerous-tumors-with-precision

Atomic view of microtubules

Atomic view of microtubules

Microtubules, hollow fibers of tubulin protein only a few nanometers in diameter, form the cytoskeletons of living cells and play a crucial role in cell division (mitosis) through their ability to undergo rapid growth and shrinkage, a property called "dynamic instability." Through a combination of high-resolution cryo-electron microscopy (cryo-EM) and a unique methodology for image analysis, a team of researchers with Berkeley Lab and the University of California (UC) Berkeley has produced an...

http://www.biyologlar.com/atomic-view-of-microtubules

Many endangered species are back -- but face new struggles

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...

http://www.biyologlar.com/many-endangered-species-are-back-but-face-new-struggles

Scientists solve mystery behind earthworm digestion

Scientists solve mystery behind earthworm digestion

Scientists have discovered how earthworms can digest plant material, such as fallen leaves, that would defeat most other herbivores. Earthworms are responsible for returning the carbon locked inside dead plant material back into the ground. They drag fallen leaves and other plant material down from the surface and eat them, enriching the soil, and they do this in spite of toxic chemicals produced by plants to deter herbivores. The scientists, led by Dr Jake Bundy and Dr Manuel Liebeke from...

http://www.biyologlar.com/scientists-solve-mystery-behind-earthworm-digestion

Transplantasyon immünolojisi

TRANSPLANTASYON İMMÜNOLOJİSİ VE TARİHÇESİ İmmünoloji İnsan İmmün (Bağışılık) sistemi zararlı olan organizmaları vücuttan uzaklaştırmaktadır. Bu sistem, vücudumuzun yaklaşık iki trilyon hücresini koruyan, antibadi ve sitokinler üreten hareketli askerleridir. Virüs, bakteri ve tümör hücreleri veya transplante edilmiş hücreler gibi yabancı ya da vücuda ait olmayan hücrelerle koordineli bir biçimde hızlıca çok yönlü bir atağa geçmektedir. Her ne...

http://www.biyologlar.com/transplantasyon-immunolojisi

FSS Partners with the Academy of <b class=red>Natural</b> Sciences

FSS Partners with the Academy of Natural Sciences

  At the beginning of the 2009-2010 school year, a new educational connection was forged between Friends Select School and the school’s Parkway neighbor, the Academy of Natural Sciences of Philadelphia. Each section of second and third grade at Friends Select attends a weekly, one hour-long lesson at the Academy for one third of the school year. These trimester-long science units are taught by museum staff members, and are designed by the Academy's education department and the lower...

http://www.biyologlar.com/fss-partners-with-the-academy-of-natural-sciences

Tail as old as time -- researchers trace ankylosaur's tail evolution

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"...

http://www.biyologlar.com/tail-as-old-as-time-researchers-trace-ankylosaurs-tail-evolution

HİSTOLOJİDE KULLANILAN BOYALARIN SINIFLANDIRMASI VE STANDARDİZASYONU

Histolojide kullanılan boyaların büyük bölümü 3 temel chromoforik gruptan (quino-noid halka, azo-grup veya nitro grup) tan birine dahildir. Quinonoid boyalar çok geniş ve önemli bir gruptur ve quinonoid yapının özel tiplerine bakılarak alt gruplara ayrılırlar. Histolojide boyalar ya boyaların uygulama tarzlarına bakılarak direkt veya mordant boya; ya da genel kimyasal özelliğine bakılarak asit veya bazik boya olarak sınıflarıdırılırlar. Bazı boyalar light green...

http://www.biyologlar.com/histolojide-kullanilan-boyalarin-siniflandirmasi-ve-standardizasyonu

Some things are too good to be true: Lycaenid butterfly larvae manipulate ants

Some things are too good to be true: Lycaenid butterfly larvae manipulate ants

Project Assistant Professor HOJO Masaru of Kobe University, Graduate School of Science, and joint research groups at the University of the Ryukyus and Harvard University have discovered that lycaenid butterfly larvae, which are in a symbiotic relationship with ants, can control the effect of dopamine by supplying the ants with nectar. The results of this study provide novel insight into the phenomenon of symbiosis and give clues about the physiological functions of dopamine. The study was...

http://www.biyologlar.com/some-things-are-too-good-to-be-true-lycaenid-butterfly-larvae-manipulate-ants

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....

http://www.biyologlar.com/doga-tarihi-calismalari-kronolojisi

Butterfly mimicry through the eyes of bird predators

Butterfly mimicry through the eyes of bird predators

In the natural world, mimicry isn't entertainment; it's a deadly serious game spanning a range of senses - sight, smell and hearing. Some of the most striking visual mimics are butterflies. Many butterflies become noxious and unpalatable to predators by acquiring chemical defences from plants they ingest as caterpillars. Other butterflies mimic the 'aposematic' or warning colouration and conspicuous wing patterns of these toxic or just plain foul-tasting butterflies. In a new study, scientists...

http://www.biyologlar.com/butterfly-mimicry-through-the-eyes-of-bird-predators

An enzyme enigma discovered in the abyss

An enzyme enigma discovered in the abyss

Scientists at the Universities of Bristol and Newcastle have uncovered the secret of the 'Mona Lisa of chemical reactions' - in a bacterium that lives at the bottom of the Pacific Ocean.

http://www.biyologlar.com/an-enzyme-enigma-discovered-in-the-abyss

Scientists report world's 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,

http://www.biyologlar.com/scientists-report-worlds-first-herbivorous-filter-feeding-marine-reptile

ARKELERİN SİSTEMATİĞİ HAKKINDA BİLGİ

ARKELERİN SİSTEMATİĞİ HAKKINDA BİLGİ

Arkeler, Arkea ( Yunanca αρχαία, "eskiler" 'den türetme; tekil olarak Arkaeum, Arkaean, veya Arkaeon), veya Arkebakteriler, canlı organizmaların bir ana bölümüdür. Yabancı literatürde bu gruptaki canlılar Archaea veya Archaebacteria, grubun tek bir üyesi ise tekil olarak Archaeum, Archaean, veya Archaeon olarak adlandırılır Arkeler, Ökaryotlar ve Bakteriler, üç-saha sisteminin ( İngilizce three domain system) temel gruplarıdır. Bakteriler gibi arkaeler de çekirdeği...

http://www.biyologlar.com/arkelerin-sistematigi-hakkinda-bilgi

Hydra can modify its genetic program

Hydra can modify its genetic program

Champion of regeneration, the freshwater polyp Hydra is capable of reforming a complete individual from any fragment of its body. It is even able to remain alive when all its neurons have disappeared. Researcher the University of Geneva (UNIGE), Switzerland, have discovered how: cells of the epithelial type modify their genetic program by overexpressing a series of genes, among which some are involved in diverse nervous functions. Studying Hydra cellular plasticity may thus influence research...

http://www.biyologlar.com/hydra-can-modify-its-genetic-program

First praying mantis survey of Rwanda uncovers rich diversity

First praying mantis survey of Rwanda uncovers rich diversity

A college student working at The Cleveland Museum of Natural History was lead author on the first formal survey of praying mantises in Rwanda, which revealed a 155 percent increase in praying mantis species diversity for the African country. Riley Tedrow, a Case Western Reserve University graduate student pursuing field research for the Museum, participated in two surveys across four locations in Rwanda, including three national parks. The survey was published Oct. 1, 2015 in the journal...

http://www.biyologlar.com/first-praying-mantis-survey-of-rwanda-uncovers-rich-diversity

 
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