Alkaline sulphide leaching was adopted to extract tellurium from tellurium-bearing gold concentrate for the first time. The tellurium leaching kinetics were studied. The influence of average particle size, stirring speed, leaching temperature, Na2S concentration, and NaOH concentration on the tellurium extraction were investigated. It was found that tellurium extraction could reach 79.14% under the optimum conditions: 17.77 μηι average particle size, 500 r/min stirring speed, 80 g/L Na2S concentration, 30g/L NaOH concentration, 80°C leaching temperature, 4:1 liquid to solid ratio, and 180 minutes leaching time. The interface transfer and diffusion through the product layer or insoluble substance layer were the rate-controlling steps. The leaching kinetics equation was established, and the activation energy was 34.384 kJ/mol.

This study aimed to explore the effects of continuous blood purification (CBP) treatment in pigs affected with acute respiratory distress syndrome (ARDS). A total of 12 healthy male pigs, weighing 12±1.8 kg, were randomly and equally assigned to the control and experimental groups. The ARDS pig model was prepared by intravenous injections of endotoxin (20 µg/kg). The control group was given conventional supportive therapy, while the experimental group was given continuous veno-venous hemofiltration therapy. During the treatment process, the variations in dynamic lung compliance, oxygenation index, hemodynamics, and urine volume per hour at different times (Baseline, 0, 2, 4, and 6 h) were recorded. The levels of tumor necrosis factor (TNF-α), interleukin 6 (IL-6), and IL-10 in serum and bronchoalveolar lavage fluid (BALF) were measured using the enzyme-linked immunosorbent assay. The histomorphological changes of the lung, heart, and kidney were visualized using a light microscope. The nuclear factor κB p65 protein content of the heart, lung, and kidney tissues was also detected using western blot. The experimental group outperformed the control group in both respiratory and hemodynamic events. CBP treatment cleared TNF-α, IL-6, and IL-10 partially from serum and BALF. The pathological examination of the heart, lung, and kidney tissues revealed that the injury was less severe in the experimental group. CBP treatment can improve the organ functions of pigs affected with endotoxin-induced ARDS and protect these organs to some extent.

ABSTRACT This study aimed to investigate the effect of chronic kidney dysfunction (CKD) on the clinical characteristics of patients with acute coronary syndrome (ACS) and the degree of coronary arterial stenosis. The study enrolled 368 patients with ACS who underwent coronary angiography. Blood glucose, glycated haemoglobin (HbA1c), total cholesterol, triglyceride (TG), low-density lipoprotein cholesterol (LDL-C), high-density lipoprotein cholesterol (HDL-C), uric acid (UA), and serum creatinine were examined randomly, and the severity of coronary artery lesions was assessed using the Gensini score. Patients were divided into three groups according to estimated glomerular filtration rate: normal renal function (n = 102), mild renal insufficiency (n = 198), and moderate to severe renal dysfunction (n = 68). The characteristics of patients with coronary artery lesions in the three groups were analysed. Of all patients, 27.7% had normal renal function. In the moderate to severe renal dysfunction group, the majority of patients were women whose average age was older. The ratio of patients with history of hypertension and diabetes mellitus was higher, blood glucose, HbA1c, TG, UA and Gensini score were obviously increased, while HDL-C was significantly decreased; all differences had statistical significance (p < 0.05). Different degrees of CKD occur in patients with ACS. In patients with ACS and CKD, metabolism of glucose and fat are significantly abnormal, and coronary arterial lesions are more serious.

RESUMEN Este estudio se propuso investigar el efecto de la disfunción renal crónica (DRC) sobre las características clínicas de los pacientes con síndrome coronario agudo (SCA), y el grado de estenosis arterial coronaria. El estudio comprendió 368 pacientes con SCA sometidos a angiografía coronaria. La glucosa en sangre, la hemoglobina glicosilada (HbA1c), el colesterol total, los triglicéridos (TG), el colesterol de lipoproteína de baja densidad (LDL-C), el colesterol de lipoproteínas de alta densidad (HDL-C), el ácido úrico (AU), y la creatinina sérica fueron examinados de manera aleatoria, evaluándose la grave-dad de las lesiones de la arteria coronaria mediante la puntuación de Gensini. Los pacientes fueron divididos en tres grupos según el índice de filtración glomerular estimado: función renal normal (n = 102), insuficiencia renal leve (n = 198), y disfunción renal moderada a severa (n = 68). Se analizaron las características de los pacientes con lesiones de la arteria coronaria en los tres grupos. De todos los pacientes, 27.7% tenían función renal normal. En el grupo de disfunción renal moderada a severa, la mayoría de los pacientes eran mujeres cuya edad promedio era mayor. La proporción de pacientes con historia de hipertensión y la diabetes mellitus era mayor; la glucosa en sangre, HbA1c, TG, AU y la puntuación Gensini estaban obviamente aumentados, mientras que el C-HDL estaba significativamente disminuido; todas las diferencias tuvieron significación estadística (p < 0.05). Diferentes grados de DRC ocurren en pacientes con SCA. En pacientes con SCA y DRC, el metabolismo de la glucosa y la grasa son significativamente anormales, y las lesiones arteriales coronarias son más graves.

Effects of grain-domain-size (GDS) on levitation force have been directly investigated and identified in well-textured YBCO bulks. A single-grain-domain YBCO bulk (phi=30mm) was prepared by a top seeded melt growth process, then divided into two, three and four grain-domain to acquire the levitation forces of samples with different GDS. It is found that the levitation force of the samples monotonously decreases with the decreasing of the average GDS (or with the increasing of the total length grain-boundaries of the sample). The maximum levitation force for the single-grain-domain sample is about 1.68, 2.05 and 2.4 times higher than that of the samples with two, three, and four grain-domains. It is concluded that the levitation force of a single-grain-domain YBCO bulk is higher than that of samples with multi-grain-domains. It is also found that the levitation force is proportional to the average grain-domain radius, but inverse proportional to the total length of grain-boundaries of the sample, a simple physical model has been provided and well interpret the experiment results.