Dataset for the thermodynamic simulation of the dissolution behaviour of elemental tellurium and tellurium dioxide in alkaline cyanide solutions.

It is necessary to simulate the thermodynamics of the Te/TeO2-CN-H2O systems to interpret the dissolution behaviour of elemental tellurium and tellurium dioxide in alkaline cyanide solutions. Below are the data employed to simulate the equilibrium diagrams presented in the article entitled "Dissolution behaviour of elemental tellurium and tellurium dioxide in alkaline cyanide solutions". Most of the reactions are available in the Hydra database of MEDUSA© software along with their logarithms to the base 10 of the equilibrium constants (i.e., log K). However, it was complemented with the log K of some important reactions (e.g., which describes the formation of H2TeO3). Log K values were calculated form the ΔG°f reported in the scientific literature. The databases reported can be used to compare the equilibrium constant values, replicate the diagrams presented in the cited article, and simulate other aqueous systems (e.g., those employing alternative lixiviant agents as thiosulfate, thiourea, etc.).

Aplasia pura de serie roja adquirida y enfermedad renal crónica en terapia de sustitución renal tipo hemodiálisis / Acquired pure aplasia of red cells and chronic kidney disease in renal replacement therapy type hemodialysis

La aplasia pura de serie roja (APSR) adquirida es un trastorno hematopoyético poco frecuente caracterizado por anemia normocítica y normocrómica, reticulocitopenia y ausencia de precursores eritroides en la médula ósea, frecuencia que ha ido incrementando en pacientes con enfermedad renal crónica. Presentamos el caso de un varón de 38 años de edad, con hipertensión arterial sistémica, en terapia hemodialítica. En su evolución cursa con anemia aguda, tras protocolo de estudio se objetivó una aplasia pura de células eritroides por anticuerpos anti eritropoyetina, el paciente recibió bolos de ciclofosfamida, quimioprofilaxis, terapia dialítica, se suspendió la eritropoyetina, presentando buena evolución, efectuándose posteriormente el trasplante renal.

Acquired pure red cells aplasia (PRCA) is a rare hematopoietic disorder characterized by normocytic and normochromic anemia, reticulocytopenia and absence of erythroid precursors in bone marrow, frequency that has been increasing in patients with chronic kidney disease. We present the case of a 38-year-old man with systemic hypertension in hemodialysis therapy. During the course of the disease, acute anemia was observed. After a study protocol, pure erythroid cell aplasia was detected by antierythropoietin antibodies, the patient received boluses of cyclophosphamide, chemoprophylaxis, dialysis therapy, erythropoietin was suspended, with favorable evolution. Subsequently, the kidney transplant.

Physiological and molecular endocrine changes in maturing wild sockeye salmon, Oncorhynchus nerka, during ocean and river migration.

Maturing adult sockeye salmon Oncorhynchus nerka were intercepted while migrating in the ocean and upstream in freshwater over a combined distance of more than 1,300 km to determine physiological and endocrine changes associated with ionoregulation. Sockeye migrating through seawater and freshwater showed consistent declines in gill Na+/K+ -ATPase (NKA) activity, plasma osmolality and plasma chloride concentration. In contrast, plasma sodium concentration became elevated in seawater as fish approached the river mouth and was then restored after sockeye entered the river. Accompanying the movement from seawater to freshwater was a significant increase in mRNA for the NKA α1a subunit in the gill, with little change in the α1b subunit. Potential endocrine signals stimulating the physiological changes during migration were assessed by measuring plasma cortisol and prolactin (Prl) concentrations and quantifying mRNA extracted from the gill for glucocorticoid receptors 1 and 2 (GR1 and GR2), mineralocorticoid receptor (MR), growth hormone 1 receptor (GH1R), and prolactin receptor (PrlR). Plasma cortisol and prolactin concentrations were high in seawater suggesting a preparatory endocrine signal before freshwater entry. Generally, the mRNA expression for GR1, GR2 and MR declined during migration, most notably after fish entered freshwater. In contrast, PrlR mRNA increased throughout migration, particularly as sockeye approached the spawning grounds. A highly significant association existed between gill PrlR mRNA and gill NKA α1a mRNA. GH1R mRNA also increased significantly, but only after sockeye had migrated beyond tidal influence in the river and then again just before the fish reached the spawning grounds. These findings suggest that cortisol and prolactin stimulate ionoregulation in the gill as sockeye salmon adapt to freshwater.

E2F-3 accumulation is regulated by polypeptide stability.

E2F is a complex family of transcription factors which appears to regulate the transcription of genes required for the S phase of the mammalian cell cycle. In the present work, we have examined the mechanisms regulating E2F-3 accumulation in mouse fibroblasts. We have determined that E2F-3 DNA binding activity is restricted to the G1/S transition and S phase in both normal BALB/c-3T3 fibroblasts and in an SV40 virus-transformed BALB/c-3T3 derivative. Immunoblot analysis indicates that G0 and G1 cells have little or no E2F-3 polypeptide and that the increase in the DNA binding activity of E2F-3 at the G1/S boundary is reflected by an increase in total E2F-3 protein. In contrast to the E2F-3 polypeptide, RNAse protection assays demonstrate that the E2F-3 mRNA is clearly present in G0 and G1 cells. Finally, pulse/chase experiments indicate that the half-life of E2F-3 is approximately 40-fold greater in cells blocked in S phase relative to asynchronously growing cells. Together, these results indicate that the accumulation E2F-3 at S phase may be regulated, at least in part, at the level of protein stability.

Análisis farmacológico conductual de la DL-4-hidroxi, 4-etil, 4-fenil butiramida (HEPB) sobre los componentes motor y discriminativo de la memoria de reconocimiento en la rata / Psychopharmacological analysis of DL-4-hydroxy, 4-ethyl, 4-phenyl butyramide (HEPB) on the motoric and discriminative components of recognition memory in the rat

Este estudio fue llevado a cabo con el objetivo de disociar entre las acciones motoras ejercidas por la administración aguda (1, 2, 5, 10, 20, 40, 60, 80, y 100 mg/kg-1 ip) de HEPB y fenobarbital y sus efectos sobre el componente descriminativo de la memoria de reconocimiento en la rata. A dosis mayores de 20 mg/kg-1, ambos anticonvulsionantes indujeron una reducción (dosis dependiente) en el número de corridas por ensayo (en ratas entradas para recorrer un corredor de 4.2 m de longitud), así como el número de elecciones efectuadas por ensayo en un laberinto en ®T¼ (continuo al corredor) para reconocer (mediante indicios no especiales) el brazo no electrificado que contenía alimento. Sin embargo, ninguno de estos fármacos afectó el porcentaje de elecciones correctas ejecutadas en el paradigma discriminativo, aún bajo condiciones de severa incoordinación motora ejercida por dosis de 60 mg/kg-1 de fenobarbital o de 100 mg/kg-1 de HEPB. Estos datos indican que si bien, a dosis subanestésicas, los anticonvulsionantes probados no alteran la memoria de reconocimiento en la rata, la eficiencia en general que resulta de la prueba conductual para dicha memoria es efectuada por un deterioro en la actividad y coordinación motora

Estudio electrofisiológico de la DL-4-hidroxi, 4-etil, 4-fenil butiramida y de sus homólogos inferiores sobre la actividad espontánea en el hipocampo / Electrophysiologic study of DL-4-hydroxy 4-ethyl, 4-phenyl butyramide and its inferior homologues on the spontaneous activity in the hippocampus

El objetivo de esta investigación fue determinar la acción del anticonvulsionante DL-4-hidroxi, 4-etil, 4-fenil butiramida (HEPB), así como de sus homólogos inferiores propionamida (HEPP) y acetamida (HEPA), sobre la actividad neuronal espontánea en laminilla del hipocampo del cobayo. Se llevaron a cabo los registros extracelulares con un electrómetro AC usando electrodos de vidrio (NaC12M, 5-10 µM) colocados en el extracto piramidal de la región CA. Los efectos de los tres compuestos (100-1000 µM en solución de Krebs normal, por 5 min) sobre la amplitud y frecuencia de la actividad unitaria fue analizada mediante programas de computadora a partir de los registros digitalizados. A concentraciones mayores de 1x10 M, los anticonvulsionantes estudiados ejercieron una acción inhibitoria (concentración dependiente) prolongada (10-80 min) sobre la frecuencia de la actividad espontánea de la neuronas CA, sin afectar la amplitud del potencial de acción. Las concentraciones inhibitorias promedio (CI calculadas a partir de los resultados obtenidos para cada fármaco son de 147 µM para HEPB y de 281 y 416 µM para HEPP y HEPA, respectivamente. Estos datos indican una relación estrecha entre la potencia y la longitud de la cadena carbonada para los tres fármacos, lo cual es sugerente de un posible mecanismo de acción común

[Primary liver cancer. Its epidemiological, clinical and biochemical characteristics]. / Cáncer hepático primario. Características epidemiológicas, clínicas y bioquímicas.

Epidemiological, clinical, biochemical and topographic features of primary hepatic cancer (PHC) were reviewed retrospective and prospectively in this study. This review consisted of 76 patients from 1971 to 1990. Forty nine males and 27 females. The mean age was 66.1 +/- 11.7 years. Hepatocellular carcinoma (HC) was the most frequent histological type (84.1%), followed by cholangiocarcinoma (87.7%). Mixed carcinoma and hepatoblastoma were 4.3 and 2.9% respectively. The prevalence af PHC among 1485 autopsies was 0.74%. The most frequent sites af metastasis were the lungs (66%) and portal vein (50%). Hepatocellular carcinoma was associated to cirrhosis in 80% of the cases. A syndrome including asthenia, weight loss, hepatomegaly and cholestasis was identified in most of the patients, and alkaline phosphatase was the most frequently disturbed laboratory test. 60% of tumors were bilateral and none of the solitary tumors had less than 5 cms in diameter. 20% of HC showed normal serum levels of AFP (< 20 ng/ml). 40% had at least one of the markers of B virus hepatitis in serum.

Cardiovascular, pulmonary, and cancer rehabilitation. 1. General principles of cardiovascular rehabilitation.

This self-directed learning module highlights advances in this topic area. It is part of the chapter on cardiovascular, pulmonary, and cancer rehabilitation for the Self-Directed Medical Knowledge Program Study Guide for practitioners and trainees in Physical Medicine and Rehabilitation. This section reviews the anatomy of the heart, physiology of exercise training, pathophysiology and clinical aspects of cardiac conditions frequently encountered in rehabilitation, cardiac evaluation techniques, physical conditioning for normal persons, and rehabilitation of the patient with heart disease. Advances that are covered in this section include indications for cardiac rehabilitation following coronary artery bypass graft compared with percutaneous transluminal coronary angioplasty and exercise testing and physical conditioning of patients on long-term beta-adrenergic blockade or with severe left ventricular dysfunction.

Cardiovascular, pulmonary, and cancer rehabilitation. 2. Cardiovascular considerations in the rehabilitation of the disabled.

This self-directed learning module addresses core concepts in the application of principles of cardiac rehabilitation for the physically disabled population. It is part of the chapter on cardiovascular, pulmonary, and cancer rehabilitation for the Self-Directed Medical Knowledge Program Study Guide for practitioners and trainees in physical medicine and rehabilitation. This section contains general and athletic conditioning programs for the disabled, rehabilitation of the disabled with coexisting cardiac disease (including modified exercise tolerance testing, cardiac demands of rehabilitation programs, and cardiac precautions), and peripheral circulatory dysfunction (arterial, venous, and lymphatic).