Genetics

Pleistocene sediment DNA from Denisova Cave

Max Planck researchers have analyzed DNA from 728 sediment samples from Denisova Cave. Their study provides unprecedented detail about the occupation of the site by both archaic and modern humans over 300,000 years. The researchers ...

Diseases, Conditions, Syndromes

Recommendations developed for evaluating chronic diarrhea

(HealthDay)—In new American Gastroenterological Association (AGA) clinical practice guidelines, published in the September issue of Gastroenterology, recommendations are presented for laboratory evaluation of chronic watery ...

Arthritis & Rheumatism

Consensus statement issued on management of foot, ankle gout

(HealthDay)—The American College of Foot and Ankle Surgeons and the American Association of Nurse Practitioners-Orthopedics Specialty Practice Group have issued a new joint clinical consensus statement on the etiology, ...

Arthritis & Rheumatism

Combo therapy not needed if low RA disease activity achieved

(HealthDay)—Once low rheumatoid arthritis (RA) disease activity is achieved with tocilizumab (TCZ) plus methotrexate (MTX), patients can discontinue MTX without significant disease worsening, according to a study published ...

Health

Extreme flooding can up exposure to pathogens

(HealthDay)—Extreme flooding, such as was seen in Hurricane Harvey, can increase exposure to pathogens, according to a research letter published recently in Environmental Science & Technology.

Surgery

3-D analysis differentiates fat grafting techniques

(HealthDay)—Autologous fat processed by means of a cotton pad filtration technique is an effective method of facial fat grafting, according to a study published online Jan. 11 in JAMA Facial Plastic Surgery.

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Sediment

Sediment is any particulate matter that can be transported by fluid flow, and which eventually is deposited.

Sediments are most often transported by water (fluvial processes) transported by wind (aeolian processes) and glaciers. Beach sands and river channel deposits are examples of fluvial transport and deposition, though sediment also often settles out of slow-moving or standing water in lakes and oceans. Desert sand dunes and loess are examples of aeolian transport and deposition. Glacial moraine deposits and till are ice transported sediments.

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