Navigation Links
Poisonous tears
Date:5/16/2011

This release is available in German.

For years Professor Leo von Hemmen, a biophysicist at the TU Muenchen, and Professor Bruce Young, a biologist at the University of Massachusetts Lowell, have been researching the sense of hearing in snakes. While discussing the toxicity of their snakes, it dawned on them that only few snakes inject their venom into their victims' bodies using hollow poison fangs. Yet, even though the vast majority of poisonous reptiles lack hollow fangs, they are effective predators.

Only around one seventh of all poisonous snakes, like the rattlesnake, rely on the trick with the hollow poison fang. The vast majority has developed another system. A typical representative of this class is the mangrove pit viper, Boiga dendrophila. Using its twin fangs, it punches holes into the skin of its victims. The venom flows into the wound between the teeth and the tissue. But there is an even easier way: many poison fangs simply have a groove the venom flows along to enter the wound.

The researchers asked themselves how this simple method could be so successful from an evolutionary perspective, considering that bird feathers, for example, should be able to easily brush away any venom flowing along an open groove. To get to the bottom of this mystery, they investigated the surface tension and viscosity of various snake venoms. The measurements showed that snake venom is amazingly viscous.

The surface tension is high, about the same as that of water. As a result, the surface energy pulls the drops into the fang grooves, where they then spread out. In the course of evolution, snakes have adapted to their respective preferred prey using a combination of optimal fang groove geometry and venom viscosity. Snakes that prey on birds developed deeper grooves to keep the viscous venom from being brushed away by bird feathers.


'/>"/>
Contact: Dr. Andreas Battenberg
battenberg@zv.tum.de
49-892-891-0510
Technische Universitaet Muenchen
Source:Eurekalert  

Page: 1 2

Related biology news :

1. Poisonous prehistoric raptor discovered by research team from Kansas and China
2. Poisonous Poisson
3. Rotator cuff tears: Are they all in the family?
Post Your Comments:
*Name:
*Comment:
*Email:
Related Image:
Poisonous tears
(Date:9/30/2014)... know what goes wrong with your muscles because of age, ... "normal" actually is. That,s where a new research report published ... Journal comes in. In the report, a team ... that can help scientists "see" which genes are active in ... never-before-detected gene activity and that men have approximately 400 more ...
(Date:9/30/2014)... release is available in German . ... their behavioural response to risky situations such as exposure ... Ornithology now found in a long-term study on different ... both metabolic rate and ambient temperature. High metabolic rates ... as in these scenarios birds were more likely to ...
(Date:9/30/2014)... a suite of perilous threats in today,s ocean. ... climate change, fragile coral ecosystems are disappearing at ... some species of corals surrounding the island of ... in their tropical environment: coral guard-crabs. New research ... Marine Station scientist Seabird McKeon and the museum,s ...
Breaking Biology News(10 mins):Scientists identify which genes are active in muscles of men and women 2Risky metabolism 2Smithsonian scientists discover coral's best defender against an army of sea stars 2
... , Jan. 24, 2013 /PRNewswire-iReach/ -- The companion diagnostics ... has become one of the most promising areas within ... companies are now entering the highly attractive market of ... developing a combination product. The explosive M&A trend in ...
... their mother,s diet during gestation and lactation were found to ... than those not exposed to the chemical, researchers at the ... BPA is a chemical most commonly found in the lining ... in many hard plastic bottles, including baby bottles, but many ...
... Researchers at the University of Pittsburgh School of ... key HIV protein. In findings published online today in ... this vulnerable spot could stop the virus from replicating, ... Previous research demonstrated that a small HIV protein ...
Cached Biology News:Global Companion Diagnostic Market Worth $19.3 billion by 2023: What it Takes to Become a Major Companion Diagnostic Player 2Global Companion Diagnostic Market Worth $19.3 billion by 2023: What it Takes to Become a Major Companion Diagnostic Player 3Global Companion Diagnostic Market Worth $19.3 billion by 2023: What it Takes to Become a Major Companion Diagnostic Player 4Global Companion Diagnostic Market Worth $19.3 billion by 2023: What it Takes to Become a Major Companion Diagnostic Player 5Female mice exposed to BPA by mothers show unexpected characteristics 2Female mice exposed to BPA by mothers show unexpected characteristics 3Pitt team finds 'Achilles Heel' of key HIV replication protein 2
(Date:10/1/2014)... 30, 2014 In response to ... to address sales, training and consumer engagement challenges, ... innovative mobile applications to turn their clients’ visions ... latest customized mobile app creations, are now featured ... In partnership with Toyota, StudioPMG created a robust ...
(Date:10/1/2014)... The U.S. Department of Labor has ... Edwardsville as part of the Trade Adjustment Assistance Community ... co-administered by the Department of Labor and Department of ... Thomas E. Perez and Secretary of Education Arne Duncan ... grants to nearly 270 colleges across the country. ...
(Date:9/30/2014)... available in German . ... Mnchen (TUM) have demonstrated a new kind of building ... future computer chips could be based on three-dimensional arrangements ... enabling technology of the semiconductor industry CMOS fabrication ... researchers and collaborators at the University of Notre Dame ...
(Date:9/30/2014)... Sept. 30, 2014 Nematicide is a ... Nematodes are microscopic parasitic roundworms, found in massive ... other plants and animals. Nematicides have tended to ... properties promoting migration through the soil. A single ... plant-parasitic nematodes. With more than 10,000 species classified, ...
Breaking Biology Technology:Digital Agency Studio PMG Launches New Case Studies on Website 2U.S. Dept. of Labor Awards SIUE Nearly $10-Million Grant 2U.S. Dept. of Labor Awards SIUE Nearly $10-Million Grant 3U.S. Dept. of Labor Awards SIUE Nearly $10-Million Grant 4A new dimension for integrated circuits: 3-D nanomagnetic logic 2A new dimension for integrated circuits: 3-D nanomagnetic logic 3Nematicides Market by Types (Fumigants, Organophosphates, Carbamate and Bio-Nematicides), Applications (Agrochemicals, Industrial, and Others), and Geography (North America, Europe, Asia-Pacific & ROW) - Global Trends & Forecasts to 2019 2
... Calif. and MONROVIA, Calif., Jan. 6, 2011 Amgen ... today that they will collaborate to develop XmAb ® ... and CD32b.  XmAb5871 is currently in late-stage preclinical development ... Under the terms of the agreement, Amgen has the ...
... SAN FRANCISCO, Jan. 6, 2011 Vista Partners ... Therapeutics, Inc. (Nasdaq: OPXA ) and raised ... Silver, Principal Analyst at Vista Partners stated, "Opexa announced yesterday ... for the treatment of Multiple sclerosis , is now ...
... 6, 2011 BioInformatics, LLC announces the release of ... Technologies:  Market Insights for Life Science Suppliers (#10-005) This ... respond in a timely fashion to the rapidly changing ... LLC quantifies and characterizes the market for genetic analysis ...
Cached Biology Technology:Amgen and Xencor Enter Option Deal to Co-Develop Xencor's Novel Antibody for Autoimmune Diseases 2Amgen and Xencor Enter Option Deal to Co-Develop Xencor's Novel Antibody for Autoimmune Diseases 3Vista Partners Updates Coverage on Opexa Therapeutics, Inc.; Raises Target Price From $4.40 to $6.50 2BioInformatics, LLC New Market Report - Genomics Technologies 2
Mouse monoclonal antibody to ALAS2 - aminolevulinate, delta-, synthase 2 (sideroblastic/hypochromic anemia)...
Mouse monoclonal antibody to PDK2 - pyruvate dehydrogenase kinase, isoenzyme 2...
Mouse monoclonal antibody raised against a partial recombinant FBXO24. NCBI Entrez Gene ID = FBXO24...
Mouse polyclonal antibody raised against a partial recombinant WRB. NCBI Entrez Gene ID = 7485...
Biology Products: