THERMAL INFLUENCES ON SWELLING-PRESSURE AND SWELLING-DEFORMATION OF BENTONITES AND ITS FACTORS

The Swelling Pressure of Gelatin and the Mechanism of Swelling in Water and Neutral Salt Solutions

1. A method is described for measuring the swelling pressure of solid gelatin. 2. It was found that this pressure increases rapidly between 15 degrees and 37 degrees C., and that the percentage change is nearly independent of the concentration of gelatin. 3. It is suggested that this pressure is due to the osmotic pressure of a soluble constituent of the gelatin held in the network of insoluble...

Reproducibility after de-swelling and re-swelling

The improved resistance of PDMS to pressure-induced deformation and chemical solvent swelling for microfluidic devices

We present a fabrication technique that increases the resistance of PDMS to deformation under pressure driven flow and chemical solvents swelling without the use of any foreign materials. This is achieved by enhancing the material properties of PDMS by coupling two previously isolated processes. First, the weight ratio of the prepolymer to the curing agent was increased from 10:1 to 5:1, with t...

Simulating the swelling and deformation behaviour in soft tissues using a convective thermal analogy

BACKGROUND It is generally accepted that cartilage adaptation and degeneration are mechanically mediated. Investigating the swelling behaviour of cartilage is important because the stress and strain state of cartilage is associated with the swelling and deformation behaviour. It is well accepted that the swelling of soft tissues is associated with mechanical, chemical, and electrical events. ...

the study of practical and theoretical foundation of credit risk and its coverage

پس از بررسی هر کدام از فاکتورهای نوع صنعت, نوع ضمانت نامه, نرخ بهره , نرخ تورم, ریسک اعتباری کشورها, کارمزد, ریکاوری, gdp, پوشش و وثیقه بر ریسک اعتباری صندوق ضمانت صادرات ایران مشخص گردید که همه فاکتورها به استثنای ریسک اعتباری کشورها و کارمزد بقیه فاکتورها رابطه معناداری با ریسک اعتباری دارند در ضمن نرخ بهره , نرخ تورم, ریکاوری, و نوع صنعت و ریسک کشورها اثر عکس روی ریسک اعتباری داردو پوشش, وثی...