Botanical Dermatology

Dermatology

a hyperactivity and hypertrophy of the sebaceous glands. In the condition known as seborrhceic dermatitis, however, the study of the histopathology leads Brimacombe to assert that there is a diminution of activity and sometimes an atrophy of the sebaceous glands, with an increase in size and function of the coil glands, the secretion being mainly sudoriparous. This is compensatory for the loss ...

Dermatology

Dermatology

An increasing number of patients with antibiotic-resistant propionibacteria have been described. Extensive sunbathing, even after sunscreen application, may facilitate development of skin cancers by suppressing natural immunity to these atypical growths.

Botanical ratchets.

Ratcheting surfaces are a common motif in nature and appear in plant awns and grasses. They are known to proffer selective advantages for seed dispersion and burial. In two simple model experiments, we show that these anisotropically toothed surfaces naturally serve as motion rectifiers and generically move in a unidirectional manner, when subjected to temporally and spatially symmetric excitat...

Dermatology.