Diverticular disease of the jejunum and its complications.

Jejunal diverticulosis is an uncommon, acquired condition that has been encountered recently in four patients. These cases (two patients with diverticulitis, one patient with chronic abdominal pain, and one patient incidentally discovered at laparotomy for colonic diverticulitis) are reported. Acute complications of jejunal diverticulosis include diverticulitis, bleeding, and intestinal obstruction. Chronic complications include intractable abdominal pain, malabsorption, and intestinal pseudo-obstruction. Up to 15 per cent of patients with jejunal diverticulosis may require small-bowel resection for treatment of these acute or chronic complications. The clinical significance, proper diagnostic evaluation, and treatment of jejunal diverticular disease are reviewed.

Performance of a Spectrometer for Measuring the Earth's Radiance near 4.3 micro.

A grating spectrometer which makes simultaneous measurements of the earth's radiance near 4.3 micro (2300 cm(-1)) in thirty-five spectral intervals about 0.04 micro wide at 20-sec intervals has been constructed. Calibration procedures are described which permit spectral radiances to be determined to an absolute accuracy of about 3%. Measurements made during balloon flights in 1967 and 1968 illustrate the instrument performance.

Balloon observations of the radiance of the earth between 2100 cm(-1) and 2700 cm(-1).

A grating spectrometer capable of measuring small radiation fluxes with a spectral resolution of 95 at 4.3 micro is described. Bands of CO(2), N(2)O, and O(3) are identified in spectra between 2100 cm(-1) and 2700 cm(-1) of the earth and lower atmosphere obtained from an altitude of 30 km with this instrument. Scattering of solar radiation by clouds was observed between 2400 cm(-1) and 2700 cm(-1). A temperature profile of the atmosphere to 30 km determined from an analysis of the measurements in the region of the 4.3 micro CO(2) band is compared with radiosonde observations made during the flight.