Tag: "age" at biology news
Undergraduate research shows leaderless honeybee organizing
...te honors students they are so bright. Pierce, age
22, has been working as a researcher in Schneiders lab for the past two years through a UNC Charlotte Honors College program that fosters research experiences for undergraduates. Using an ingeniously designed experiment, Pierce and his co-authors ...
Boosting key milk nutrients may protect against cancer
...ial included more than one thousand women over the age
of 55 in one of three supplement groups: 1) calcium (1400-1500mg) plus vitamin D (1100 IU vitamin D) 2) calcium only (1400-1500 mg) or 3) a placebo. The researchers found that the risk of developing cancer was 60 percent lower for those who took calc...
Studies to find better ways to preserve human eggs, ovarian tissue under way
...They are collecting ovarian tissue from volunteers age
16 to 37 who need the tissue taken for some reason...ication in eggs. They are using eggs from 60 women age
18-42 that would be discarded because they are not adequate for in vitro fertilization. They also ar...
Bigger horns equal better genes
...ic diversity. However, once the ibex mature to the age
when they begin competing for reproductive mates (7 to 12), horn length varies according to genetic diversity: the greater the diversity, the greater the length of the horns. The researchers believe the horn length discrepancies are evidence to s...
What causes Alzheimer's? Researchers tie beta-amyloids to brain dysfunction
...f the normal volunteers in our study whose average age
was 72 had a positive scan. In subjects with mild cognitive impairment (MCI)a condition that leads to Alzheimer's dementia in about 60 percent of caseswe found positive scans in 60 percent of the subjects. The amount of amyloid present, measured by t...
Women up to age 30 at risk for bone loss, study finds
...for nearly two hours each day. One group ranged in age
from 18 to 23 years, and the other was aged 26 to ...ontinually being replaced with new bone. In both age
groups, two bone formation markers were suppressed, suggesting that low energy availability continue...
Smithsonian scientists connect climate change, origins of agriculture in Mexico
...t encountered by humans at the end of the last ice age
(14,000-10,000 B.P.) was drier and 4 or 5 degrees Centigrade cooler than it is today. The Balsas valley is one of the most likely sites for the domestication of corn (Zea mays) from its wild ancestor, teosinte (Zea mays ssp. parviglumis) because pop...
In search of the biological significance of modular structures in protein networks
... across modules like the way people from the same age
group tend to interact more with each other than with people from different age
groups. It is widely believed that networks within cells are modular in much the same way. Drs Zhi W...
Eavesdropping comes naturally to young song sparrows
...pertoire crystallizes at around 10 to 11 months of age
and does not change. Beecher and his colleagues earlier proposed that eavesdropping and interactive singing are critical in song learning. However, they could not determine if the young birds learned more by direct interaction with a tutor or by ea...
Endogenous cannabinoids linked to fetal brain damage imposed by maternal cannabis use
...interactions than non-exposed children of the same age
and social background....
MIT researchers probe bones' tiny building blocks
...ity and integrity of bone change dramatically with age
and disease, hence understanding the origins of the mechanical properties of this major load-bearing, structural tissue in our body is extremely important from a medical standpoint," Ortiz said. Using a table-top instrument called a molecular force...
Sexual orientation affects how we navigate and recall lost objects, but age just targets gender
...uch as navigating with a map in a car but that old age
does not discriminate on grounds of sexual orienta...han heterosexual members of that gender. However age
was found to discriminate on gender grounds but not sexual orientation. The study found that mens me...
Flaws in colonoscopies may increase risk of colon cancer
... optimal results from their colonoscopy, including age
of the patient, location of the screening and prop...onitoring for inflammatory bowel disease (IBD) and age
(no one older than 80 or younger than 18). The success rate was measured by the completion rate (gr...
New study indicates that people may need more dietary choline than previously thought
...onference found that choline intake decreases with age
and that adults ages 71 and older consume an average of about 264 milligrams per day roughly half of the AI for choline. 3 Eggs, beef liver, chicken liver and wheat germ are considered excellent sources of choline. Two eggs contain 280 milligr...
Salt increases ulcer-bug virulence
...adults. About 20% of persons less than 40 years of age
and about 50% of persons over 60 years of age
are infected. Most infected people do not have symptoms and only a small percentage go on to develop...
A close-up on pancreatic disease: How do we improve the odds?
...8%) compared to females (12/99, 12%), as did older age
(average 67 years for malignancy vs. 62 years for benign lesions). Most patients with malignancy displayed symptoms (28/31, 96%), with abdominal pain being the most common symptom (55%), followed by weight loss (35%), jaundice and pancreatitis. In ...
Exercise reverses aging in human skeletal muscle
... University. The younger (20 to 35 with an average age
of 26) and older (older than 65 with an average age
of 70) adults were matched in terms of diet and exercise; none of them took medication or had diseas...
U of MN will lead national research study on causes of bone cancer in children
...n cancer of the bone in children under 20 years of age
in the United States. Each year about 400 children are diagnosed with the disease. Spector is an assistant professor of pediatrics at the University of Minnesota Medical School and Cancer Center. The University of Minnesota is a national research a...
Parkinson's protein protects neurons from stress induced cell death
...e. Usually, Parkinsons disease occurs after the age
of 50 and in Germany about 400,000 people are affected. It is characterized by a decline of neurons in the so-called Substantia Nigra, a structure in the midbrain that produces dopamine. The resulting deprivation of this messenger substance causes sy...
FSU engineering professor growing bone in a lab
...ut of every two women and one in four men over the age
of 50 eventually will suffer an osteoporosis-related fracture, and many more are at risk. Such fractures typically occur in the hip, spine and wrist. "Currently, there are two sources of bone that can be used for performing corrective grafts -- the...
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