Category: News (page 5 of 17)

yvette fay francis-mcbarnette

The New York Times ran an obituary commemorating the life of Dr. Yvette Francis-McBarnette. I had never heard of her but found her life story inspirational, especially for budding minority scientists.

Yvette Francis McBarnette

Dr Yvette Fay Francis-McBarnette

Yvette immigrated to New York City from Jamaica with her parents and at 14 years old she began studies at Hunter College. After completing a bachelor’s degree in physics, she began a master’s degree in chemistry at Columbia University. Then she went on to be come only the second black woman to earn a medical degree from Yale University.

As a physician, she made tremendous progress in studying and treating sickle cell anemia in young patients. Sickle cell disease deforms the shape of red blood cells, making them rigid and harder to pass through capillaries. It can lead to oxygen deprivation in organs and tissues and also severe pain. The disease is more prevalent in black and Mediterranean populations.Yvette pioneered new antibiotic treatments for the disease and established the Foundation for Research and Education in Sickle Cell Disease. And she did all of this work during the 1950s and 60s when women had fewer opportunities and less support than exists today, doubly so for black women.

 

spermbots


Fortune magazine reports on some exciting research related to male infertility. As the headline says, “This Robot Is Like a Chauffeur for Slow Sperm”. Basically, researchers have developed tiny metal helices that wrap around the tail of a sperm cell. The helix effectively turns the sperm into a micromotor that can be directed a magnetic field. They are calling the invention a “spermbot”.

The video above lets you see how spermbots can propel once immobile sperm toward an egg.  So far scientists haven’t been able to actually fertilize an egg using the spermbot, but they are optimistic that with further study and development, this might someday improve success of in vitro fertilizations.

Take a look at the original research paper here in Nano Letters.  Caged Oligo explains some of the science behind the machine.

a ring to prevent HIV

HIV Prevention Ring

A monthly vaginal ring can prevent HIV transmission in women.

Women use a silicone elastomer vaginal matrix ring that dispenses an anti-HIV drug—similar to ones used to dispense birth control hormones—and are protected from HIV infection for a month.

According to researchers who tested the ring on more than 4,500 African women between the ages of 18 and 45, the concept works. Women who used the ring were 27 percent less likely to become infected with the HIV virus, according to data presented last Monday at the annual Conference on Retroviruses and Opportunistic Infections in Boston.

The ring must remain inserted the entire month for the treatment to work most effectively. Researchers are currently working on ways of improving the ring to make it easier for women to adhere to the treatment.

“We need to figure out what women really want,” says Carl Dieffenbach, director of the Division of AIDS, National Institute of Allergy and Infectious Diseases who oversees more than a billion dollars of National Institutes of Health–funded AIDS research and was not involved with the study. “This is just a step along the way. Do we do better if we offer women protection from pregnancy as well as protection from HIV?” The next studies might have both birth control and antiviral properties or perhaps just contraception instead of a placebo.

//vawessoa.com/4/4535925