Search PubMed⌕ Search

Biomedical subjects

A Butturini

Publications and source records attributed to A Butturini.

83 records · Page 5Linked to original sources
PubMed1984

Serum TSH, T4, T3, FT4, FT3, rT3, and TBG in youngsters with non-ketotic insulin-dependent diabetes mellitus.

Several parameters of thyroid function were studied in 112 non-ketoacidotic youngsters with insulin-dependent diabetes mellitus (IDDM). Levels of thyroxine (T4), reverse triiodothyronine (rT3), thyroxine-binding globulin (TBG) and T3 were lower than in controls, whereas FT4, and FT3 were normal. T4 levels in IDDM patients were positively related to T3, rT3 and TBG, and inversely related to haemoglobin A1 (HbA1). However, only 4 patients showed biochemical hypothyroidism (T4 less than 5 micrograms/100 ml), whereas their FT4, FT3 and thyroid-stimulating hormone (TSH) levels were normal. Concurrent variations of T3 and rT3 levels were found in IDDM patients; thus, their T3/rT3 ratios were stable or higher than in controls, indicating that peripheral deiodination of T4 is preferentially oriented to production of rT3 only during ketoacidosis. Although changes in thyroid function may reflect the degree of metabolic control of diabetes in a large population, the clinical usefulness of serum thyroid hormone measurements in an individual case still appears to be limited.

Adolescent↗
PubMedDate not supplied

Leaf litter dynamics and nitrous oxide emission in a Mediterranean riparian forest: implications for soil nitrogen dynamics.

Mediterranean riparian zones can experience severe drought periods that lead to low soil moisture content, which dramatically affects their performance as nitrate removal systems. In the Mediterranean riparian zone of this study, we determined that N2O emission was practically nil. To understand the role of forest floor processes in nitrogen retention of a Mediterranean riparian area, we studied leaf litter dynamics of two tree species, London planetree [Platanus x acerifolia (Aiton) Willd.] and alder [Alnus glutinosa (L.) Gaertn.], for two years, along with soil nitrogen mineralization rates. Annual leaf litter fall equaled 562.6 +/- 10.1 (standard error) g dry wt. m(-2), 68% of which was planetree and 32% of which was alder. The temporal distribution of litterfall showed a two-peak annual cycle, one occurring in midsummer, the other in autumn. Planetree provided the major input of organic nitrogen to the forest floor, and the amount of planetree leaves remaining on the forest floor was equivalent to approximately four years of stock. Leaf litter decomposition was three times higher for alder (decay coefficient [k] = 1.13 yr(-1)) than for planetree (k = 0.365 yr(-1)). Mineralization rates showed a seasonal pattern, with the maximum rate in summer (1.92 mg N kg(-1) d(-1)). Although the forest floor was an important sink for nitrogen due to planetree leaf accumulation, 7.5% of this leaf litter was scoured to the streambed by wind. This loss was irrelevant for alder leaves. Due to the litter quality, the forest floor of this Mediterranean riparian forest acts as a nitrogen sink.

Betulaceae↗
PubMedDate not supplied

Normal values of total reticulocytes and reticulocyte subsets in children and young adults.

This work provides the values for percentage and total reticulocyte count, as well as the values of reticulocyte fluorescence intensity ratios as determined by an automated fluorescent technique in a normal pediatric population. The peripheral reticulocyte subsets, as assessed on the basis of their degree of maturation, allow a more accurate evaluation of bone marrow activity than the percentage or total count do. This would result in a more appropriate management of erythropoietic disorders in children.

Adolescent↗
PubMedDate not supplied

Medical response to nuclear and radiation accidents.

The authors discuss the several strategies for treating bone marrow suppression caused by exposure to acute high-dose total body radiation. Supportive measures prevent death from infection and/or bleeding and thereby permit autologous bone marrow recovery. Another approach stimulates bone marrow recovery using molecularly cloned hematopoietic growth factors. A third approach replaces the damaged bone marrow via a transplant, either permanently or temporarily.

Accidents↗