Information on the knowledge, uses, and abundance of natural resources in local communities can provide insight on conservation status and conservation strategies in these locations. The aim of this research was to evaluate the uses, knowledge and conservation status of plants in two Quilombolas (descendants of slaves of African origin) communities in the Atlantic rainforest of Brazil, São Seba...

We have measured plasma volume and cardiac index in rats after 50% isovolemic exchange transfusion with human hemoglobin cross-linked between the alpha-chains with bis(3,5-dibromosalicyl)fumarate (alpha alpha Hb) and with bovine hemoglobin modified with polyethylene glycol (PEGHb). alpha alpha Hb and PEGHb differ in colloid osmotic pressure (23.4 and 118.0 Torr, respectively), oxygen affinity (...

ized by high-level production of hemoglobin A (HbA), which is composed of two ␣ and two ␤ subunits, each bound to a heme moiety and produced in a concerted * the bound heme; oxygen binds cooperatively and re-* versibly to ferrous iron from the opposite side of the 1 Department of Molecular Biology heme plane. The elaborate oxygen binding mechanism Lewis Thomas Laboratory of HbA allows the conce...

To study the nature of numerous inclusion bodies seen in red cells from patients with sickle cell disease (Hb SS), we have prepared red cell ghosts free of oxyhemoglobin and analyzed them by spectrophotometric and heme extraction methods. The absorption spectrum in the visible region of the ghost suspensions was typical of hemichromes. The spectrum was similar to that of denatured hemoglobin re...

The regulation of fetal hemoglobin in adult erythroid cells was investigated with bone marrow cultures. Fetal hemoglobin (Hb F) was identified in individual erythroid colonies with fluorescent antibodies against Hb F and synthesis of gamma chains was determined with analyses of radioactive globins. The appearance of fetal hemoglobin in erythroid colonies was clonal. All the cells of the Hb F sy...

normal 0 false false false en-us x-none ar-sa aim: ct number (hu) and linear attenuation coefficient contain useful information which  can be determined during usual ct scanning for the prediction of breast cancerous cells existence based on hemoglobin concentration. methods: this study used breast phantom containing major and minor vessels with diameters of 10 and 5 mm, respectively. the major...

This investigation is concerned with the kinetics of the reciprocal relationship between sheep hemoglobin (Hb) A and Hb C formation in response to anemia. The relative synthesis of the hemoglobin types was assessed at various times in bone marrow erythroid cells incubated in vitro with (59)Fe. The changeover from Hb A to Hb C formation lagged by about 3 days behind the development of anemia and...

Hemoglobin H (Hb H) disease is the most common form of thalassemia intermedia and has many features that require careful consideration in management. In the majority of cases, Hb H disease results from double heterozygosity for alpha(0)-thalassemia due to deletions that remove both linked alpha-globin genes on chromosome 16, and deletional alpha(+)-thalassemia from single alpha-globin gene dele...

We have compared polyethylene glycol-modified bovine hemoglobin (PEG-Hb; high O2 affinity, high viscosity, high oncotic pressure) and human hemoglobin cross-linked between the alpha-chains (alpha alpha-Hb; low O2 affinity, low viscosity, low oncotic pressure) with a non-O2-carrying plasma expander (pentastarch, high viscosity and oncotic pressure) after a 50% (by volume) exchange transfusion fo...

By RALPH C. LKE AND Tii-t s H. J. HuI5MAN T HREE possible variants of Hb-A2 ( a262) with abnormal 6 polypeptide chains have been discovered, namely, Hb-A2’ or Hb-B2 in the Negro race,1’2’4’#{176}”1 Hb-K#{246}ln in one family of German descent13 and Hb-Fbatbush in a family of Puerto Rican ancestry.’4 In this communication, we report the results of studies of an abnormal minor hemoglobin componen...