SILICON DIOXIDE CONTENT OF LUNGS IN HEALTH AND DISEASE

JAMA ◽  
1933 ◽  
Vol 101 (8) ◽  
pp. 584 ◽  
Author(s):  
WILLIAM D. McNALLY
Keyword(s):  
Silicon Dioxide ◽  
Health And Disease ◽  
Silicon Dioxide Content

Preparation and Properties of High-Density Polyethylene/Silica Composites

2011 ◽  
Vol 279 ◽  
pp. 115-119 ◽  
Author(s):  
Jing Long Gao ◽  
Yan Hui Liu ◽  
Shou Dong Wei
Keyword(s):  
Mechanical Properties ◽  
Thermal Properties ◽  
Thermal Degradation ◽  
Yield Strength ◽  
Silicon Dioxide ◽  
High Density Polyethylene ◽  
High Density ◽  
Breaking Elongation ◽  
Silica Dioxide ◽  
Silicon Dioxide Content

High-density polyethylene (HDPE)/silica composites with different silicon dioxide fraction were prepared by the melting blend method. The effects of silicon dioxide content on the thermal properties and mechanical properties were mainly investigated. The results show that the thermal degradation of the composites shifts towards higher temperatures as the concentration of silicon dioxide is increased. With increasing silica dioxide content, the tension yield strength of HDPE/silicon composites increased, but its breaking elongation decreased. When silicon dioxide content is 5 %, the tension yield strength and its breaking elongation are 29.33 MPa and 102.82 %, respectively.

Sintering, Microstructure and Dielectric Properties of Ca-Al-B-Si-O Glass/Al2O3 Composites with Various SiO2 Content

2011 ◽  
Vol 130-134 ◽  
pp. 1516-1519
Author(s):  
Ming Liu ◽  
Hong Qing Zhou ◽  
Hai Kui Zhu ◽  
Min Liu ◽  
Jian Xin Zhao
Keyword(s):  
Dielectric Constant ◽  
Dielectric Properties ◽  
Dielectric Loss ◽  
Silicon Dioxide ◽  
Bulk Density ◽  
Microwave Dielectric Properties ◽  
Microwave Dielectric ◽  
Tan Δ ◽  
Silicon Dioxide Content

The effects of silicon dioxide addition on the sintering, microstructure and microwave dielectric properties of Ca-Al-B-Si-O glass/Al2O3 composites were investigated. Results show that: Increasing the silicon dioxide content in the glass leads to the corresponding rise of bulk density, dielectric constant of the LTCC materials and the decrease of its dielectric loss and porosity. A bulk density of 2.92 g·cm-3, a porosity of 0.2%, aεr value of 7.11 and a tan δ value of 0.00096(measured at 10 MHz) are obtained for 68 wt% silicon dioxide of the samples sintered at 875°C for 30 min.

scholarly journals Studies various factors effecting the synthesis of submicron silicon dioxide particles by leaching from waste dumps of the Balaklavskoe deposit

2021 ◽  
Vol 2057 (1) ◽  
pp. 012137
Author(s):  
V A Turyanskiy ◽  
G A Baranov ◽  
T V Chayka ◽  
V M Gavrish
Keyword(s):  
Silicon Dioxide ◽  
High Efficiency ◽  
Solid Phase ◽  
Average Particle Size ◽  
Precipitation Process ◽  
Average Particle ◽  
Waste Dumps ◽  
Dioxide Powder ◽  
Soda Solution ◽  
Silicon Dioxide Content

Abstract The paper presents the results of studies of the main parameters of synthesis of silicon dioxide powder from Balaklava deposit sludge with silicon dioxide content of 24%. During the study caustic soda solution is used as a leaching agent and sulfuric acid was used as a precipitant. At the leaching stage the concentration of leaching agent, the ratio of liquid phase to solid phase, the optimum temperature of leaching as well as the mode of pulp agitation are investigated. At the precipitation stage, the following parameters are considered: concentration of precipitating agent and temperature of the precipitation process. As a result of using the optimal parameters the high efficiency of obtaining silica powder of 98.56% is achieved. Average particle size is 200-800 nm, and agglomerate size is more than 800 nm.

Drug Induced Changes in Cell Organelles

1968 ◽  
Vol 26 ◽  
pp. 110-111
Author(s):  
Sarah A. Luse
Keyword(s):  
Clinical Medicine ◽  
Cell Organelles ◽  
Riboflavin Deficiency ◽  
Drug Induced ◽  
New Era ◽  
Health And Disease ◽  
In The Beginning ◽  
Cellular Pathology ◽  
Induced Changes ◽  
The Impact

In the mid-nineteenth century Virchow revolutionized pathology by introduction of the concept of “cellular pathology”. Today, a century later, this term has increasing significance in health and disease. We now are in the beginning of a new era in pathology, one which might well be termed “organelle pathology” or “subcellular pathology”. The impact of lysosomal diseases on clinical medicine exemplifies this role of pathology of organelles in elucidation of disease today.Another aspect of cell organelles of prime importance is their pathologic alteration by drugs, toxins, hormones and malnutrition. The sensitivity of cell organelles to minute alterations in their environment offers an accurate evaluation of the site of action of drugs in the study of both function and toxicity. Examples of mitochondrial lesions include the effect of DDD on the adrenal cortex, riboflavin deficiency on liver cells, elevated blood ammonia on the neuron and some 8-aminoquinolines on myocardium.

The Laryngeal Epithelium in Reflux

2011 ◽  
Vol 21 (3) ◽  
pp. 112-117 ◽  
Author(s):  
Elizabeth Erickson-Levendoski ◽  
Mahalakshmi Sivasankar
Keyword(s):  
Laryngopharyngeal Reflux ◽  
Critical Role ◽  
Structure And Function ◽  
Laryngeal Disease ◽  
Health And Disease ◽  
And Function ◽  
The Impact

The epithelium plays a critical role in the maintenance of laryngeal health. This is evident in that laryngeal disease may result when the integrity of the epithelium is compromised by insults such as laryngopharyngeal reflux. In this article, we will review the structure and function of the laryngeal epithelium and summarize the impact of laryngopharyngeal reflux on the epithelium. Research investigating the ramifications of reflux on the epithelium has improved our understanding of laryngeal disease associated with laryngopharyngeal reflux. It further highlights the need for continued research on the laryngeal epithelium in health and disease.

Studies on Gastric Mucus in Health and Disease

1965 ◽  
Vol 48 (6) ◽  
pp. 758-767 ◽  
Author(s):  
Lansing C. Hoskins ◽  
Norman Zamcheck
Keyword(s):  
Gastric Mucus ◽  
Health And Disease

A Method for the Colorimetric Determination of β-Glucuronidase in Urine, Serum, Tissue; Assay of Enzymatic Activity in Health and Disease

1959 ◽  
Vol 36 (2) ◽  
pp. 193-201 ◽  
Author(s):  
Julius A. Goldbarg ◽  
Esteban P. Pineda ◽  
Benjamin M. Banks ◽  
Alexander M. Rutenburg
Keyword(s):  
Enzymatic Activity ◽  
Colorimetric Determination ◽  
Health And Disease ◽  
Urine Serum
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