scholarly journals Clarification of purple cactus pear juice using microfiltration membranes to obtain a solution of betalain pigments

2015 ◽  
Vol 18 (3) ◽  
pp. 220-230 ◽  
Author(s):  
Cristina VERGARA ◽  
Beatriz CANCINO-MADARIAGA ◽  
Andrés RAMÍREZ-SALVO ◽  
Carmen SÁENZ ◽  
Paz ROBERT ◽  
...  
Keyword(s):  
Antioxidant Activity ◽  
Pore Size ◽  
Ceramic Membrane ◽  
Cactus Pear ◽  
Microfiltration Membranes ◽  
Pear Juice

Summary Betalains are fruit pigments possessing health-giving properties. To isolate the pigments, the juice must be separated from the fruit matrix, which contains biopolymers. The aim of this study was to clarify cactus pear juice by microfiltration to obtain a clarified juice containing betalains. For this purpose, two 0.2 µm pore size microfiltration membranes (ceramic and polymeric) were tested. The permeates were clear, free of turbidity and high in betalains (20%), also containing polyphenols and antioxidant activity, whereas the retained fractions were high in mucilage. The best separation was obtained using the ceramic membrane.

Removal of bacteriophages with different surface charges by diverse ceramic membrane materials in pilot spiking tests

2012 ◽  
Vol 66 (1) ◽  
pp. 151-157 ◽  
Author(s):  
B. Hambsch ◽  
M. Bösl ◽  
I. Eberhagen ◽  
U. Müller
Keyword(s):  
Pore Size ◽  
Ceramic Membrane ◽  
Ceramic Membranes ◽  
Pilot Scale ◽  
Size Exclusion ◽  
Feed Water ◽  
Surface Charges ◽  
Membrane Materials ◽  
Pore Sizes ◽  
Microfiltration Membranes

This study examines mechanisms for removal of bacteriophages (MS2 and phiX174) by ceramic membranes without application of flocculants. The ceramic membranes considered included ultra- and microfiltration membranes of different materials. Phages were spiked into the feed water in pilot scale tests in a waterworks. The membranes with pore sizes of 10 nm provided a 2.5–4.0 log removal of the phages. For pore sizes of 50 nm, the log removal dropped to 0.96–1.8. The membrane with a pore size of 200 nm did not remove phages. So, the removal of both MS2- and phiX174-phages depended on the pore size of the membranes. But apart from pore size also other factors influence the removal of phages. Removal was 0.5–0.9 log higher for MS2-phages compared with phiX174-phages. Size exclusion seems to be the major but not the only mechanism which influences the efficiency of phage removal by ceramic membranes.

Application of the ceramic membrane with hydrophobic skin layer to separation of activated sludge

1997 ◽  
Vol 35 (8) ◽  
pp. 137-144 ◽  
Author(s):  
Tsuyoshi Nomura ◽  
Takao Fujii ◽  
Motoyuki Suzuki
Keyword(s):  
Activated Sludge ◽  
Pore Size ◽  
Ceramic Membrane ◽  
Membrane Separation ◽  
Porous Ceramic ◽  
Porous Membrane ◽  
Skin Layer ◽  
Gas Permeation ◽  
Wide Range ◽  
Cake Layer

Porous membrane of poly(tetrafluoroethylene) (PTFE) was formed on the surface of porous ceramic tubes by means of heat treatment of the PTFE particles deposit layer prepared by filtering PTFE microparticles emulsified in aqueous phase. By means of inert gas permeation, pore size was determined and compared with scanning electron micrograph observation. Also rejection measurement of aqueous dextran solutions of wide range of molecular weights showed consistent results regarding the pore size. Since the membrane prepared by this method is stable and has unique features derived from PTFE, it is expected that the membrane has interesting applications in the field of water treatment. Membrane separation of activated sludge by this composite membrane and original ceramics membrane showed that the PTFE membrane gives better detachability of the cake layer formed on the membrane. This might be due to the hydrophobic nature of the PTFE skin layer.

scholarly journals Optimization of protein fractionation by skim milk microfiltration: Choice of ceramic membrane pore size and filtration temperature

2016 ◽  
Vol 99 (8) ◽  
pp. 6164-6179 ◽  
Author(s):  
Camilla Elise Jørgensen ◽  
Roger K. Abrahamsen ◽  
Elling-Olav Rukke ◽  
Anne-Grethe Johansen ◽  
Reidar B. Schüller ◽  
...  
Keyword(s):  
Pore Size ◽  
Ceramic Membrane ◽  
Skim Milk ◽  
Protein Fractionation ◽  
Membrane Pore ◽  
Membrane Pore Size

scholarly journals Fenton Discoloration of Ultrasonicated Purple Cactus Pear Juice

Molecules ◽  
2017 ◽  
Vol 22 (8) ◽  
pp. 1344 ◽  
Author(s):  
Isidro Reyes-Hernández ◽  
Nelly Cruz-Cansino ◽  
Ingrid Santander-Martínez ◽  
Ernesto Alanís-García ◽  
Luis Delgado-Olivares ◽  
...  
Keyword(s):  
Cactus Pear ◽  
Pear Juice

Application of nanoemulsions (w/o) with active compounds of cactus pear fruit in starch films to improve antioxidant activity and incorporate antibacterial property

2019 ◽  
Vol 42 (7) ◽  
Author(s):  
Gabriela Medina‐Pérez ◽  
Juan P. Hernández‐Uribe ◽  
Dania Fernández‐León ◽  
Laurette Prince ◽  
Fabián Fernández‐Luqueño ◽  
...  
Keyword(s):  
Antioxidant Activity ◽  
Antibacterial Property ◽  
Pear Fruit ◽  
Active Compounds ◽  
Cactus Pear ◽  
Starch Films

Dietary fiber, phytochemical composition and antioxidant activity of Mexican commercial varieties of cactus pear

2015 ◽  
Vol 41 ◽  
pp. 66-73 ◽  
Author(s):  
Dulce María Jiménez-Aguilar ◽  
Julieta Melissa López-Martínez ◽  
Carmen Hernández-Brenes ◽  
Janet Alejandra Gutiérrez-Uribe ◽  
Jorge Welti-Chanes
Keyword(s):  
Antioxidant Activity ◽  
Dietary Fiber ◽  
Cactus Pear ◽  
Phytochemical Composition
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