An elephant task

elephant

The ivory trade was banned by CITES (the Convention on International Trade in Endangered Species of Wild Fauna and Flora) in 1989. However, illegal trade continues and as such researchers in India suggest that there is a continued need to characterize Asian elephant ivory and to be able to compare it with African ivory so that national and international laws can be implemented more effectively.

Previously, Erich Raubenheimer and colleagues in the Department of Oral Pathology, Medical University of Southern Africa, established an ivory database that would allow law enforcers to trace the source of illegal ivory and so identify poorly managed game parks, particularly in Africa. However, the ivory of Asian elephants, of which half are found in India, is more prized than African ivory. It is only the males of the Asian elephant that has tusks and they are much smaller than those of its African counterpart. Despite the illegal price differential between continents, the ivory of African and Asian elephants is indistinguishable in superficial appearance, particularly once processed, so it is almost impossible to trace the origin of tusks or a piece of work.

Read the elephant’s tale on spectroscopynow.com

Chemistry jobs

Chemistry Jobs

There are lots of opportunities out there in the job market for chemists, so check out our newly updated chemistry jobs newsfeed powered by ScienceJobs.net. You will find the latest opportunities in all areas of the chemical sciences: Lectureships, research jobs, MBAs, tenure track positions, fellowships, university programs, lectureships, post-doctoral positions, research experience opportunities, research assistant jobs, and faculty positions from all the big players.

Technical tasks include Pfizer looking to fill Molecular & Cell Biology Pathways R4-R6 2 positions and Cell Biologist / Assay Development R3-R5. On the admin side of science, Memorial Sloan-Kettering Cancer Center is looking for an Assistant to Chairman.

Clinilabs has several jobs to fill in New York: Clinical Research Associate, Clinical Research Coordinator, Director of Business Development, Quality Assurance and Compliance Manager, and several others.

For more science jobs, check out the Careers section here.

Brazilians wax lyrical on food testing

Brazilian researchers have developed a method to analyse the metal ion content of food products by combining X-ray spectroscopy (XRS) with a partial least-squares (PLS) data treatment. Their approach promises to be faster, more widely applicable to a range of food and agricultural products, and less expensive than other methods.

Food quality control is critical to consumer safety and satisfaction. Knowing levels of inorganic analytes, such as the toxic elements arsenic, cadmium, chromium, and lead, is important, as is information on macro-nutrients like calcium, potassium, magnesium, sodium, phosphorus, and sulfur and micronutrients (copper, iron, manganese, and zinc).

Read the complete story in the latest science news round-up from David Bradley in Spectroscopynow.com

Cellulite and weight loss

Cellulite weight lossCellulite is of growing concern to a huge number of women and many consider different ways of reducing it including bariatric surgery or a tummy tuck liposuction procedure, diets and other methods, while others really couldn’t care less about the superficial dimpling of their subcutaneous fat. Moreover, it provides yet another example of the medicalisation of a perfectly harmless “condition” as exemplified by the description of “sufferers” as patients.

But, recent research into weight loss and its effects on so-called cellulite is making a big splash. Losing weight can reduce the appearance of cellulite for some women, according to research undertaken by plastic surgeon John Kitzmiller and colleagues. But, here’s the rub, weight loss could make the condition much worse for others.

About 85% of women (that’s 8.5 women in every ten ;-) are affected by cellulite, Kitzmiller claims, “Cellulite is not specific to overweight people, but excess weight may worsen the condition. We found that weight loss in overweight patients improved the appearance of cellulite, but for a few, it actually worsened the condition.”

He examined 29 women [not the biggest most statistically significant sample] who enrolled in medically supervised weight loss programs including low-fat meals, liquid diets, medication, and bariatric surgery. Seventeen patients experienced an improvement in the appearance of their cellulite, while 9 worsened. The average weight loss was 30.5 pounds (range 2.3 — 102 pounds).

Those women who lost most weight and reduced their thigh fat too saw the greatest reduction in cellulite. These patients had a significantly higher starting body mass index (BMI) and had more severe cellulite on average. “Patients” whose cellulite worsened started with a significantly lower BMI, lost smaller amounts of weight, and had no change in percentage of thigh fat.

“There is no answer for completely eliminating cellulite, however, it appears the more weight one loses, the better its appearance,” explains Kitzmiller. “Although the appearance of cellulite diminished for the majority of patients, weight loss did not totally eradicate the condition. The dimples appear to be permanent features that lessen in depth as the pounds come off.”

Needless to say the cosmetic industry and plastic surgeons the world over will be rubbing their hands with glee at Kitzmiller’s revelations. Meanwhile, those women who should be reducing their weight for genuine health reasons who are looking for another reason to procrastinate may find the study most useful in providing them with another reason to put off that new fitness regime and low-cal diet.

Watching the stars closely

NASA Hubble Stars

NASA’s Hubble Space Telescope continues to surprise astronomers, this time by identifying the parent star of a distant planet through the observational technique of gravitational microlensing. By elucidating detailed information about the star associated with an exoplanet, astronomers should now be able to unearth the properties of the planet itself and so improve our understanding of planet formation and evolution.

Read the full story in the latest issue of Spotlight from David Bradley and Intute.

Also in this month’s Spotlight – Cornell physicist J.C. Séamus Davis and colleagues at Tokyo University and AIST Labs, Tsukuba, Japan, have been watching superconductors ever so closely, atom by atom in fact. Now, his shocking observations could turn up the heat on this area of research as he has found that high-temperature superconductors may be much more like low-temperature superconductors than scientists previously thought. The discovery has implications for making new superconducting materials. Read on…

And…

The radioactive decay of the rust-coloured mineral monazite can help scientists synchronise their geological clocks thanks to work carried out at New York’s Vanderbilt University. Microscopic crystals of the material act as tiny clocks allowing a date to be stamped on rich ore deposits in rock formations altered by high-temperature fluids. More…

20 year model relieves stress

20 year old model

No…not that kind of model!

“The formation and evolution of dislocation cell structures (patterning) is one of the most important aspects of the deformation process in ductile metals,” according to Lyle Levine and colleagues at the National Institute of Standards and Technology (NIST), Oak Ridge National Laboratory (ORNL), and the University of Southern California. Metallurgists already know that this patterning process arises as clusters of dislocations interact with each other while recent diffraction-resolved studies have shown that the process is initiated by crystal lattice breakup. However, predicting exactly how a metal will behave under stress remains an unresolved problem. Now, Levine and his colleagues have turned to a twenty-year old model to help them out.

Read on…

How to write a successful science thesis

Scientific thesis

This concise guide to the art of writing a scientific thesis demonstrates how you can wring the max. from your results with the min. of effort, at least that’s what the jacket claims.

The book is based on a proven concept that assumes no special writing talent and builds on the model of the previous publication in the series The Art of Scientific Writing. If you’ve got the results and plenty of notes, but no idea how to bring them together to create a degree-winning thesis, then grab a copy of Ebel et al’s latest book.

It’s packed with examples, as well as providing challenging problems to help you organise your thoughts and work.

Perfect for anyone with a term paper, thesis, or dissertation to write. Co-author William E Russey of Juniata College says it will “ultimately lead to better grades”. And, that can be no bad thing.

How to Write a Successful Scientific Thesis available from Amazon

Brain protein unlocked

A key protein linked to neurodegenerative diseases, such as Huntington’s and Alzheimer’s diseases, has been characterised using NMR by US researchers.

John Cavanagh, Douglas Kojetin, David Kordys, and Richele Thompson of North Carolina State University teamed with colleagues Ronald Venters of Duke University and Rajiv Kumar of the Mayo Clinic and Foundation have obtained a structure for the protein, calbindin-D28K. This protein modulates calcium levels by sequestering calcium from areas that have too much or serves as an on/off switch for further chemical reactions. It is found in the kidneys, pancreas, ocular nerve and large amounts are present in the brain. It is its role in the brain as a “bodyguard” against the action of the enzyme caspase-3 that links it to neurodegenerative diseases. By binding to and inhibiting caspase-3, calbindin D28K prevents the formation of damaging plaque and tangle formation in the brain, which are hallmarks of neurodegenerative disease. The structure of this key protein has remained elusive, until now.

Read on…

Bird flu reaches the US

…but it’s not the deadly strain of avian influenza (high-pathogenicity avian influenza, HPAI H5N1) that has featured in endless media speculation over the last couple of years. At a time, when the Thai authorities have announced several new cases of bird flu in their country, scientists in the US have detected the low-pathogenicity (LPAI) bird flu in wild swans near the banks of Lake Erie.

Ron DeHaven, administrator of USDA’s Animal and Plant Health Inspection Service, told the Associated Press that “We do not believe this virus represents a risk to human health.” Preliminary testing showed the presence of the H5 and the N1 sub-types in the infected Michigan birds, but the USDA explains that these are more probably present because of LPAI, which is also known as American H5N1, as opposed to Asian H5N1.

Evidence of this putative low pathogenicity avian influenza (LPAI) has been found on two occasions in wild birds in the United States. In 1975 and 1986, it was detected in wild ducks. These detections occurred as part of routine sampling. LPAI H5N1 has also been detected in Canada, most recently in 2005.

Asian H5N1 has killed at least 140 people but is yet to mutate into a form that is readily transmissable between humans. Indeed, it seems the only likely way you catch this strain is through very close proximity to infected birds (i.e. sharing living quarters) or by coming into contact with feces from an infected bird.

More on the Michigan bird flu story…