HOME >> BIOLOGY >> NEWS
PNAS highlights for the week of May 16 - 20

veins with alternating strong and weak adherence properties. Adhesion dropped when the separation between the veins bonding the aspartate became so small that the leucine segments no longer fit between the veins.

The researchers suggest this precise spatial control of amino acids on inorganic surfaces could have many technological applications.

Tracing the Rise of Ants

In a perspective article, Edward O. Wilson and Bert Hlldobler explore the evolutionary history of ants, tracing their waves of expansion from the first appearance more than 100 million years ago.

Over the past two decades, fossil discoveries combined with studies of anatomy, behavior, and DNA have helped clarify the phylogeny of ants, the authors say. Yet some puzzles remain, such as how the important and ancient subfamily Ponerinae spread so widely while retaining relatively primitive social organization--a question the authors term "the ponerine paradox."

A full explanation will require further discoveries in paleontology and ecology, the authors note. Until then, Wilson and Hlldobler offer a combined phylogenetic and ecological "dynastic-succession" hypothesis that ties together existing knowledge.

Key events in this history include an initial adaptation to forest ground litter and soil coincident with a surge in flowering plants, then an advance to ecological dominance in tropical forests, and finally a broad expansion up into trees and outward into drier environments.

Fish Genitalia May Balance Attractiveness with Predatory Escape

Male genital size in some fish species may be driven by competing evolutionary mechanisms, reflecting a tradeoff between the capacity to attract mates and the ability to quickly evade predators, researchers report.

Diversity of male genitalia size in animals with internal fertilization has intrigued scientists. Most evolutionary explanations have centered on postmating sexual selection,
'"/>

Contact: Leikny Johnson
PNASNews@nas.edu
202-334-1310
Proceedings of the National Academy of Sciences (PNAS)
16-May-2005


Page: 1 2 3 4 5 6

Related biology news :

1. Other highlights in the Aug. 7 JNCI
2. Other highlights in the July 24 JNCI
3. Other highlights from the July 10 JNCI
4. Other highlights in JNCI, June 26
5. Other highlights in JNCI, June 12
6. Other highlights from the June 6 JNCI
7. Other highlights in the May 16 JNCI
8. InfoSNM highlights advances in computer, information sciences for molecular imaging
9. Landmark study highlights complex genetic risk factors behind type 2 diabetes
10. Other highlights from the April 18 Journal of the National Cancer Institute
11. Cold Spring Harbor Protocols highlights reliable methods for gene and protein analyses

Post Your Comments:
*Name:
*Comment:
*Email:
TAG: PNAS highlights for the week May

(Date:7/24/2014)... different effects on different species of fish, according ... Bristol and Exeter which tested fish anti-predator behaviour. ... flying seagull predator model when exposed to additional ... minnows. , Lead author Dr Irene Voellmy ... levels in many aquatic environments have increased substantially ...
(Date:7/24/2014)... meaning the microbial populations found on surfaces in the ... final flavor according to research published ahead of print ... This is the first time investigators have taken a ... sake makers inoculate with both bacteria and yeast, says ... California, Davis, but he and his colleagues investigated a ...
(Date:7/24/2014)... NJIT this week for an all-day public forum on ... Agency (EPA) to dredge toxic sediment from an eight-mile ... has called the plan, which proposes removing 4.3 million ... the riverbed, one of the largest cleanups in the ... disposed off-site. , "We need to ensure the future ...
Breaking Biology News(10 mins):The microbes make the sake brewery 2Experts Weigh the Pros and Cons of a $1.7 Billion EPA Cleanup Plan for the Passaic River at an NJIT 2
(Date:7/24/2014)... forces worldwide rely on sophisticated equipment, trained personnel, ... public areas against terrorist attacks. A revolutionary new ... to make their job much easier. , The ... of Tel Aviv University ,s School of Chemistry ... by the Herzliya company Tracense, picks up the ...
(Date:7/24/2014)... natural and synthetic processes prefer to settle into ... energyit is within the realm of non-equilibrium conditions ... changes in energy and phases, such as temperature ... allow humans to regulate their body temperature, airplanes ... seismic activity. , But even though these ...
(Date:7/24/2014)... Calif. , July 24, 2014 SRI ... contract with the National Institute of Allergy and Infectious ... to conduct preclinical development of potential therapies for HIV ... drugs to treat HIV and AIDS and the complications ... as microbicides for preventing sexual transmission of HIV. ...
(Date:7/24/2014)... -- Neogen Corporation (Nasdaq: NEOG ) advised market ... from new rodenticide research are premature. In its regular ... 22, 2014, Neogen,s CEO commented about several new developments ... "It was my intent Tuesday at our conference call ... type of rodenticide, but certainly not to give any ...
Breaking Biology Technology:Nano-sized chip 'sniffs out' explosives far better than trained dogs 2New approach to form non-equilibrium structures 2National Institute of Allergy and Infectious Diseases Awards SRI International Contract to Study New Therapies for HIV and AIDS 2National Institute of Allergy and Infectious Diseases Awards SRI International Contract to Study New Therapies for HIV and AIDS 3Neogen comments on SenesTech 2
Cached News: