Osmotic squat actuation in stiffness adjustable bacterial cellulose composite hydrogels

2020 ◽  
Vol 8 (12) ◽  
pp. 2400-2409
Author(s):  
Chen Qian ◽  
Taka-Aki Asoh ◽  
Hiroshi Uyama
Keyword(s):  
Osmotic Pressure ◽  
Bacterial Cellulose ◽  
Stimuli Responsive ◽  
Composite Hydrogels ◽  
Pressure Changes ◽  
Cellulose Composite

Stimuli-responsive stiffness change and squat actuation were realized in bacterial cellulose hydrogels by utilizing internal osmotic pressure changes.

3D Printing of Antimicrobial Alginate/Bacterial-Cellulose Composite Hydrogels by Incorporating Copper Nanostructures

2019 ◽  
Vol 5 (11) ◽  
pp. 6290-6299 ◽  
Author(s):  
Elena Gutierrez ◽  
Patricio A. Burdiles ◽  
Franck Quero ◽  
Patricia Palma ◽  
Felipe Olate-Moya ◽  
...  
Keyword(s):  
3D Printing ◽  
Bacterial Cellulose ◽  
Composite Hydrogels ◽  
Cellulose Composite

Colloid osmotic pressure changes of dog's blood exposed to different mixtures of CO2 and air

1978 ◽  
Vol 44 (2) ◽  
pp. 254-257 ◽  
Author(s):  
Y. Kakiuchi ◽  
A. B. DuBois ◽  
D. Gorenberg
Keyword(s):  
Red Blood Cells ◽  
Osmotic Pressure ◽  
Cell Volume ◽  
Blood Cells ◽  
Freezing Point ◽  
Colloid Osmotic Pressure ◽  
Red Cell ◽  
Freezing Point Depression ◽  
Pressure Changes ◽  
Different Levels

Hansen's membrane manometer method for measuring plasma colloid osmotic pressure was used to obtain the osmolality changes of dogs breathing different levels of CO2. Osmotic pressure was converted to osmolality by calibration of the manometer with saline and plasma, using freezing point depression osmometry. The addition of 10 vol% of CO2 to tonometered blood caused about a 2.0 mosmol/kg H2O increase of osmolality, or 1.2% increase of red blood cell volume. The swelling of the red blood cells was probably due to osmosis caused by Cl- exchanged for the HCO3- which was produced rapidly by carbonic anhydrase present in the red blood cells. The change in colloid osmotic pressure accompanying a change in co2 tension was measured on blood obtained from dogs breathing different CO2 mixtures. It was approximately 0.14 mosmol/kg H2O per Torr Pco2. The corresponding change in red cell volume could not be calculated from this because water can exchange between the plasma and tissues.

Biosynthesis of Carboxymethylated Bacterial Cellulose Composite for Wound Dressing

2011 ◽  
Vol 685 ◽  
pp. 322-326 ◽  
Author(s):  
Jun Wei Yu ◽  
Xiao Li Liu ◽  
Chang Sheng Liu ◽  
Dong Ping Sun
Keyword(s):  
Bacterial Cellulose ◽  
Wound Dressing ◽  
Culture Medium ◽  
Acetobacter Xylinum ◽  
Water Holding Capacity ◽  
Water Soluble ◽  
Transmission Rates ◽  
Measurement Results ◽  
Water Holding ◽  
Cellulose Composite

A novel bacterial cellulose (BC) composite (carboxymethylated-bacterial cellulose, CM-BC) was synthesized by Acetobacter xylinum by adding water-soluble carboxymethylated cellulose (CMC) in the culture medium. FTIR results showed that CM-BC is obtained by the incorporation of CMC in the network of BC. Water-holding capacity and water vapor transmission rates (WVTR) of CM-BC and BC are determined. The WVTR of CM-BC is comparable to that of BC, but the water-holding capacity of CM-BC is improved compared with BC. Tensile strengths measurement results showed that the fracture stress of CM-BC is higher than that of BC, indicating that CM-BC have more potential wound dressing applications than BC.

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