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Tag: "microscopic" at biology news

Report warns about carbon dioxide threats to marine life

...temperatures cause the coral to expel the colorful microscopic algae that provide the coral polyps with food. Many calcifying organisms--including marine plankton such as pteropods, a planktonic marine snail--are affected by the chemistry changes. Shelled pteropods are an important food source for salmon, macke...

Bone marrow may restore cells lost in vision diseases

...ale, albino recipients, Harris said. Chemical and microscopic analysis showed the cells that traveled to the injury site and transformed into RPE indeed had male genetic characteristics. Furthermore, these cells were capable of producing pigment - a colorful indication that the RPE could only have arisen from t...

Movie spies on malaria parasite's sneaky behavior

...a red fluorescent marker, Amino was able to record microscopic images inside the animal's liver. He found that not only did the structures Heussler's group saw on the liver cells in the culture dish, called merosomes, protrude from the animal's liver cells as well, but the scientists watched as they pinched off ...

Gut microbes' partnership helps body extract energy from food, store it as fat

...ells but also bacterial cells and cells of another microscopic domain of life known as Archaea," says senior author Jeffrey Gordon, M.D., the Dr. Robert J. Glaser Distinguished University Professor. "As adults, the number of these bacterial and archaeal microbial cells exceeds the number of our human cells by te...

Surprise finding for stretched DNA

...ty of California at Berkeley used a combination of microscopic beads and magnetic tweezers to observe that when a DNA molecule is stretched, it actually begins to overwind. This overwinding continues until the force being applied to stretch the DNA exceeds about 30 picoNewtons. (One picoNewton is about a trillio...

Arctic coring expedition continues to yield new clues

...ditions." In today's oceans, certain species of microscopic plants are known to rapidly multiply and create algal blooms. Dickens said that fossils of these plants ?known only to originate in the tropics before the PETM ?are commonly seen in the ACEX cores. Furthermore, the chemistry of the organic carbon in ...

Gene screen for breast cancer better than pathologist's 'eye'

...cancer-detection rates of their QM-MSP test versus microscopic review by a pathologist on breast fluid samples. The fluid samples, taken from high-risk women or those diagnosed with breast cancer, were obtained through a process called ductal lavage, a saline wash via a catheter threaded through openings in the...

Giant deep-sea tubeworm's meal ticket comes in as a skin infection

...s volcanicsoup in which they both thrive. But the microscopic larvae of these giantsare born bacteria-free, with a completedigestive system. Juveniles swim, hunt, andeat before permanently settling down andtaking up with their microbial partners. Nowthe idea that the larvae acquire theirsymbionts by eating them...

UCLA scientists strengthen case for life more than 3.8 billion years ago

...r. Scientists can aim the beam of ions at specific microscopic areas of a sample and analyze them. While critics noted there are ways to make light carbon in the absence of life, Harrison considers those possibilities to be "extremely unlikely," especially in light of another discovery of rocks in Western Gree...

DOE JGI finishes 100th microbial genome

...ia, Archaea, and even the Eukaryota, which include microscopic fungi, plants, and animals. The 100th microbial genome, a project originally proposed by Dr. Kevin Sowers of the Center of Marine Biotechnology at the University of Maryland Biotechnology Institute (UMBI), is Methanosarcina barkeri fusaro, a metha...

Microbes hitchhike across Atlantic on desert dust

... way from Africa to the Americas by hitchhiking on microscopic dust particles kicked up by storms in the Sahara, according to research presented today at the 106th General Meeting of the American Society for Microbiology in Orlando, Florida. "This study presents evidence of early summer survival and transport ...

Key to early diagnosis of autism may be in the placenta

...am identified trophoblast inclusions by performing microscopic examinations of placental tissues. "We knew that ...Trophoblast inclusions reflect abnormal folding of microscopic layers in the placenta and appear to result from altered cell growth. Kliman likened the presence of...

Iron critical to ocean productivity, carbon uptake

...owth and the absence of the mineral stresses these microscopic ocean plants, triggering them to produce additional pigments that make ocean productivity appear more robust than it really is. As a result, past interpretations of satellite chlorophyll data may be inaccurate, the researchers say, and the tropical ...

A catalogue of proteins

...ng at the structures and organelles in cells using microscopic methods, and then drawing conclusions about their function. Biochemical methods have allowed scientists to examine the inner life of the cell, an organisational unit basic to all life. Now, they are clarifying its structures in detail: from mitochond...

NASA study solves ocean plant mystery

...this affects Earth's climate. Phytoplankton is a microscopic ocean plant and an important part of the ocean food chain. By knowing what limits its growth scientists can better understand how ecosystems respond to climate change. The study focused on phytoplankton in the tropical Pacific Ocean. It is an area ...

APS lecturer shows rare video of 'teacher-student' immune cell interactions in live animal

...g how many of the component cells proceed on their microscopic duties. Until recently, there has been no way to directly view much of this complex cellular teamwork in vitro and in real time. The von Andrian videos provided a real-time look at what happens inside a mouse lymph node when a foreign microbe enters...

Inside rocks, implications for finding life on Mars

...n spectroscopy, could enable scientists to look at microscopic fossils inside the rocks to search for signs of li... "It's astounding to see an organically preserved, microscopic fossil inside a rock and see these microscopic fossils in three dimensions," said Schopf, who is als...

The diversity of marine life in the Gulf of Maine region is much greater than previously thought

...th Carolina). The scope of life forms ranges from microscopic plants to marine mammals in waters from the lower ...oft sediments that cover much of the sea floor and microscopic bacteria and viruses that live throughout the ecosystem. While most are invisible to the human eye,...

How sperm crack the whip

...found that he could patch clamp the pipette into a microscopic "cytoplasmic droplet" that is present in sperm before ejaculation, but is usually lost in mature sperm. Patch clamp studies on spermatozoa with remnant cytoplasmic droplets revealed that CatSper1 was a major component of the calcium ion channel res...

The secret life of algae

...being. Research into fundamental relationships and microscopic bacteria may not seem important at first but it is only by improving our understanding at this level that we can discover how to maintain the health of ecosystems at a global level." ...

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