Recovery of bioactive compounds in kiwifruit juice by ultrafiltration

Ultrafiltration performance of PVDF, PES, and cellulose membranes for the treatment of coconut water (Cocos nucifera L.)

“…This effect was also observed by Campos et al (1996), who found an enzyme activity value of 32.1 U.mL -1 for the PPO enzyme and 114.3 U.mL -1 for the POD enzyme in coconut water in natura. The differences in the enzyme activities of in natura coconut water are probably due to differences in the composition of the raw material and the other factors previously mentioned.…”

“…It was filtered to remove coarse solids through a stainless steel sieve (mesh size 20 and 850 µm opening). In order to inhibit enzymatic activity before and during the process, 200 mg of ascorbic acid per liter of coconut water in natura was added immediately after extraction (CAMPOS et al, 1996).…”

“…Enzyme activity was determined based on the method of Campos et al (1996). The PPO enzyme activity was determined using catechol as a phenolic substrate, the following solutions were poured into a glass cuvette at room temperature (25 °C): 1.3 mL of 0.35 M (pH 6.0) phosphate buffer, 0.7 mL of 0.2 M catechol, and 2 mL of coconut water.…”

Microfiltration of kiwifruit juice and fouling mechanism using fly-ash-based ceramic membranes

“…These bioactive compounds, which have positive effects on human health, are very sensitive to thermal treatment. Cassano et al used a cellulose acetate ultrafiltration membrane to clarify kiwifruit juice, resulting in microbiologically stabilized clarified juice that retained the major part of the fruit's original bioactive compounds (Cassano et al, 2004(Cassano et al, , 2008. Polymeric membranes are inexpensive in comparison with inorganic membranes.…”

Clarification of red raspberry juice using microfiltration with gas backwashing: A viable strategy to maximize permeate flux and minimize a loss of anthocyanins

“…In the past several decades, UF and MF have been increasingly investigated for clarification of juices of different fruits including apple (Vladisavljević et al, 2003), blackcurrant (Pap et al, 2011, sour cherry (Wang et al, 2005), pear (Kirk et al, 1983), melon and watermelon (Vaillant et al, 2005;Rai et al, 2010), kiwifruit (Cassano et al, 2008), passion fruit (Vaillant et al, 1999), starfruit (Sulaiman et al,4 1998), orange and lemon (Rai et al, 2007;Espamer et al, 2006), grapefruit (Snir et al, 1995), mango (Vaillant et al, 2001), banana, pineapple and blackberry (Vaillant et al, 2008), chokeberry and redcurrant (Koroknai et al, 2008), grape (Rektor et al, 2004), peach (Brenna et al, 2000) and plum (Ushikubo et al, 2007).…”