The Low Background Infrared calibration (LBIR) facility at the National Institute of Standards and Technology (NIST) presently maintains four absolute cryogenic radiometers (ACRs) which serve as standard reference detectors for infrared calibrations performed by the facility. The primary standard for optical power measurements at NIST-Gaithersburg has been the High Accuracy Cryogenic Radiometer...

Justin Martyr, in his argument with Trypho the Jew,' cites Adam, Abel, Enoch, Lot, Noah, and Melchizedek as examples of ancients who were uncircumcized but approved by God, and then he adds: "Moreover, all those righteous men already mentioned, though they kept no Sabbaths, were pleasing to God; and after them Abraham with all his descendents until Moses. . . . ' 2 The assertion that none of th...

A female Rottweiler dog was presented with a history of intermittent vomiting and diarrhoea, dysorexia, weakness, and weight loss. Haemocytometry and biochemistry values were within normal ranges except for electrolyte analyses, that demonstrated hyponatremia and hyperkalemia with a decreased sodium/potassium ratio. A diagnosis of hypoadrenocorticism was suspected. Basal and post-ACTH stimulati...

Black brown hyperpigmentation of the mucosae, sunexposed skin, palmar creases and frictional sites (Addisonian pigmentation) is characteristic of Addison disease. However, it can also occur as a paraneoplastic manifestation of tumours like bronchogenic carcinoma. Acquired ichthyosis starts later in life and can also be a paraneoplastic presentation. We report a unique combination of paraneoplas...

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In children with acquired oesophageal strictures * even without a definite history of ingestion, there could be a foreign body in the oesophagus * diagnostic work-up in cases of suspected 'occult foreign body' still presents difficulties, particularly if the foreign body is radiolucent * the chronic presence of a foreign body in the oesophagus may lead to severe and unsuspected complications a ...