Polyurethane Rigid Foam Derived from Reduced Sweet Whey Permeate

1997 ◽  
Vol 45 (10) ◽  
pp. 4156-4161 ◽  
Author(s):  
Ming Hu ◽  
Jung-Yeon Hwang ◽  
Mark J. Kurth ◽  
You-Lo Hsieh ◽  
Charles F. Shoemaker ◽  
...  
Keyword(s):  
Whey Permeate ◽  
Rigid Foam ◽  
Sweet Whey ◽  
Polyurethane Rigid Foam

Preparation of magnetic polyurethane rigid foam nanocomposites

2012 ◽  
Vol 291 (4) ◽  
pp. 903-909 ◽  
Author(s):  
Mir Mohammad Alavi Nikje ◽  
Mohammad Amin Farahmand Nejad ◽  
Keyvan Shabani ◽  
Moslem Haghshenas
Keyword(s):  
Rigid Foam ◽  
Polyurethane Rigid Foam

Water-blown Polyurethane Rigid Foam Modified with Maleate

2005 ◽  
Vol 41 (4) ◽  
pp. 373-387 ◽  
Author(s):  
Satoshi Murayama ◽  
Kenji Fukuda ◽  
Tadashi Kimura ◽  
Toshiaki Sasahara
Keyword(s):  
Rigid Foam ◽  
Polyurethane Rigid Foam

scholarly journals Modelling formation and removal of biofilms in secondary dairy raw materials

2020 ◽  
pp. 59-68
Author(s):  
Svetlana Ryabtseva ◽  
Yulia Tabakova ◽  
Andrey Khramtsov ◽  
Georgy Anisimov ◽  
Vitalii Kravtsov
Keyword(s):  
Glass Surface ◽  
Raw Materials ◽  
Dairy Industry ◽  
Skim Milk ◽  
Whey Permeate ◽  
Biofilm Growth ◽  
Sweet Whey ◽  
Acid Whey ◽  
Skimmed Milk ◽  
Milk Permeate

Introduction. Microorganisms of dairy raw materials tend to adhere to the surfaces of processing equipment and form sustainable biofilms, which is a serious issue in the dairy industry. The goal of the present work was to investigate formation of biofilms on a glass surface in static model conditions, and removal of such biofilms by cleaning. Study objects and methods. The study objects were the permeates of skim milk, sweet whey and acid whey, as well as the biofilms formed and washings from glass slides. Biofilms were removed from the glass with detergents used in the dairy industry. Standard methods of determining microbiological and physicochemical properties were used to characterize the permeates. The biofilm structure and morphology of microorganisms participating in biofilm formation were investigated with a light spectroscopy. The efficiency of biofilm removal in a cleaning process was quantified with optical density of washings. Results and discussion. Biofilms in whey permeates formed slower compared to those in skimmed milk permeate during the first 24 h. Yeasts contributed significantly to the biofilm microflora in acid whey permeate throughout 5 days of biofilm growth. Well adhered biofilm layers were the most stable in skimmed milk permeate. The highest growth of both well and poorly adhered biofilm layers was observed in sweet whey permeate after 3–5 days. It was established that the primary attachment of microorganisms to a glass surface occurred within 8 h, mature multicultural biofilms formed within 48 h, and their partial destruction occurred within 72 h. Conclusion. The research results can be used to improve the cleaning equipment procedures in processing secondary dairy raw materials.

Preparation and Characterization of Polyurethane Rigid Foam/Expanded Perlite Thermal Insulation Composites

2010 ◽  
Vol 96 ◽  
pp. 141-144 ◽  
Author(s):  
Ming Xing Ai ◽  
Li Qiang Cao ◽  
Xiao Long Zhao ◽  
Zhen Yu Xiang ◽  
Xiang Yong Guo
Keyword(s):  
Compressive Strength ◽  
Thermal Properties ◽  
Thermal Insulation ◽  
Mechanical And Thermal Properties ◽  
Expanded Perlite ◽  
Rigid Foam ◽  
Two Component ◽  
Good Heat ◽  
Polyurethane Rigid Foam

The polyurethane rigid foam/expanded perlite thermal insulation composites (PPC) have been prepared by mixing the two-component polyurethane and expanded perlite. The effects of proportioning of constituents on the mechanical and thermal properties of PPC were investigated. The results showed the compressive strength of PPC was improved and good heat-insulating was achieved, which would promote the application of polyurethane rigid foam and expanded perlite in buildings.

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