POSTURAL SHOCK IN PREGNANCY

Signs and symptoms of shock may be produced in some patients in late pregnancy by putting them in the dorsal recumbent posture. Change from this position will relieve the condition.The features of the supine hypotensive syndrome can be duplicated by applying pressure to the abdomen with the patient in a lateral position.The postural variations of venous pressure, blood pressure, and pulse appear to be due to obstruction of venous return from the lower portion of the body caused by the large uterus of late pregnancy compressing the vena cava.When shock is observed in a woman in late pregnancy, she should be turned to a lateral position before more active measures of treatment are begun.     

Metastatic adenocarcinoma in the baboon

An adenocarcinoma of undetermined origin, with metastasis to the skeletal system, occurred in a 27 year-old castrated male baboon (Papio species).     

Three-dimensional reconstruction and averaging of 30 S ribosomal subunits of Escherichia coli from electron micrographs

From the micrographs of a tilt series, several particles of negatively stained 30 S ribosomal subunits of Escherichia coli were three-dimensionally reconstructed. Three of them showing similar orientation with respect to the supporting foil were averaged after alignment by newly developed three-dimensional correlation methods. As a main result we found a stained channel-like structure inside the particle. We tentatively propose that this corresponds, at least partially, to positively stained segments of the 16 S RNA.