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Renal Tubular Hypouricemia And Calcium Urolithiasis, Tadashi Kotake, Naoto Miura, Haruo Ito

Scanning Microscopy

The information concerning the relationship of hypouricemia with urinary tract stones is limited. We investigated the incidence and types of hypouricemia, and also studied its relationship to urinary tract stones. Hypouricemia was detected in 3 out of 1520 outpatients (0.20%). The loading tests using pyrazinamide, probenecid and benzbromarone showed that uric acid absorption was impaired before tubular secretion in two cases and incomplete postsecretory reabsorption in one case. Complication of urinary tract stone was found in two cases. The composition of the stones was mixed calcium oxalate and uric acid. Hypouricemia should be recognized as one of the causes of …

Microwear Studies Of Early African Hominid Teeth, Pierre-François Puech

Scanning Microscopy

Studies of microwear on fossil hominid teeth have become an important approach in paleoanthropology. Since there are very few samples of early hominids from East Africa with suitable teeth, this paper presents a review of the occurrence of some dental wear characteristics to provide a data base for reconstructing the diet of the early hominids.

Distinctive microwear features such as furrows, crenulations, stress lines and deep grooves, are interpretive tools that can be used in a biomechanical approach. Occurrence of the same dental microwear patterns in extant species with known dietary differences is indicative of foods that have probably been …

Factors Affecting Fasting Urinary Calcium Excretion In Stone Former Patients On Different Dietary Calcium Intake, Piergiorgio Messa, Giuseppe Mioni, Rossana Franzon, Michele Messa, Aldo Cruciatti, Sandro Giannini, Angela D'Angelo

Scanning Microscopy

The effects of variable calcium content on daily and fasting urinary calcium and other lithogenic solutes excretion, on the bone turnover index (fasting hydroxyproline urinary excretion) and on the calciotropic hormones were studied in 312 stone former patients with an outpatient protocol and 15 stone former patients in an inpatient study. Furthermore in 60 of these patients, 30 while on a low calcium diet (LCD) and 30 on a free calcium home diet (FCD), the effects of an oral calcium load (OCL) on bone turnover index, calciotropic hormones and calcium excretion were evaluated. The results demonstrate that an LCD is …