Results 21 to 30 of about 2,050 (137)

Banana Polyphenoloxidase. Preparation and Properties [PDF]

Plant Physiology, 1963
Griffiths (13) has presented evidence indicating that the browning reactions of banana fruit result from the enzymic oxidation of dopamine (3,4 dihydroxyphenylethyliamine) by polyphenoloxidase. Although dopamine does occur in various fruits and vegetables (23), it has not previously been implicated as an important substrate in browning reactions.
openaire   +2 more sources

Fontes e doses de potássio na produção e qualidade do grão de café beneficiado Sources and doses of potassium on the yield and quality of green coffee

Pesquisa Agropecuária Brasileira, 1999
Um experimento de campo foi instalado num Latossolo Roxo distrófico, localizado na Fazenda Experimental da EPAMIG, São Sebastião do Paraíso, MG, em fevereiro de 1993, utilizando-se a espécie Coffea arabica L., cultivar Catuaí Vermelho, linhagem LCH 2077 ...
Enilson de Barros Silva, Francisco Dias Nogueira, Paulo Tácito Gontijo Guimarães, Silvio Júlio de Rezende Chagas, Laerte Costa   +4 more
doaj   +1 more source

Modelling the reactions between free phenols, vitamin C, apple polyphenoloxidase and oxygen during a thermal treatment

, 1992
The kinetics of degradation of chlorogenic acid, epicatechin, L-ascorbic acid and ofpolyphenoloxidase activity from some apple in malate buffer (pH 3.8) solutions at 20 and 50 °Cwith oxygen were investigated to provide information on the impact of the ...
Nicolas, Jacques, Louarme, Loïc, Aka, Jean-Pierre, Courtois, Francis,, Billaud, Catherine   +4 more
core   +3 more sources

Influence of terms and methods of storage on changes in enzyme activity of meadow chernozem-like soil on Zeya-Bureya plain

Бюллетень Почвенного института им. В.В. Докучаева, 2022
The analysis of the biological and enzymatic properties of soils is an important aspect of soil ecology, but the results of studies can be strongly influenced by the storage conditions of the samples.
O. A. Piletskaya, D. A. Yachnaya
doaj   +1 more source

Combined effect of high pressure, temperature and holding time on polyphenoloxidase and peroxidase activity in banana (Musa acuminata)

, 2000
Polyphenoloxidase and peroxidase enzyme activities were evaluated following combined pressure, temperature and holding time treatment in banana (Musa acuminata).
Schaschke, C.J., MacDonald, L.
core   +4 more sources

Influência do processamento por via úmida e tipos de secagem sobre a composição, físico química e química do café (Coffea arabica L). Influence of the wet processing and drying types on chemical and physicochemical composition of coffee (Coffea arabica L.)

Ciência e Agrotecnologia, 2009
O café (Coffea arabica L.) é um importante produto de exportação brasileira, por fazer parte do hábito alimentar da população de diversos países. Sua produção vem passando por transformações tecnológicas que têm como objetivo agregar valores qualitativos
Mariá Auxiliadora Santos, Sára Maria Chalfoun, Carlos José Pimenta   +2 more
doaj   +1 more source

Some Biochemical properties of polyphenoloxidase from spearmint (Mentha arvensis)

Brazilian Archives of Biology and Technology, 2009
Polyphenoloxidase (PPO; EC 1.14.18.1) extracted from Mentha arvensis leaves was isolated by (NH4)2SO4 precipitation and extensive dialysis. Its optimum pH and temperature varied with the substrate. The PPO showed activity with various diphenols.
Valdir Augusto Neves, Douglas Gatte Picchi, Maraiza Aparecida da Silva   +2 more
doaj   +1 more source

The Polyphenoloxidase of Pear Fruit [PDF]

Australian Journal of Biological Sciences, 1964
Following a study of the enzymic browning of apples (Wall,"r 1964) a similar study of pear polyphenoloxidase (PPO) was initiated.
openaire   +1 more source

Effect of dense-phase CO2 on polyphenoloxidase in model solutions

, 2014
This paper was addressed to investigate polyphenoloxidase structural changes in model solutions upon inactivation by DP-CO2 treatments. Polyphenoloxidase was chosen as a typical example of an enzyme responsible for food quality decay.
MANZOCCO, Lara, ANESE, Monica, Maria Cristina Nicoli, IGNAT, Alexandra, Sara Spilimbergo, Giovanna Ferrentino, Agnese Panozzo, Alexandra Ignat, Lara Manzocco, Giorgio Mirolo, NICOLI, Maria Cristina, Monica Anese   +11 more
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Ativação de defesa em cacaueiro contra a murcha-de-verticílio por extratos naturais e acibenzolar-S-metil Activation of defence responses on cocoa against Verticillium wilt by natural extracts and acibenzolar-S-methyl

Pesquisa Agropecuária Brasileira, 2008
O objetivo deste trabalho foi avaliar o potencial de extratos fúngicos e vegetais na redução da murcha-de-verticílio do cacaueiro, as atividades da peroxidase e polifenoloxidase e o conteúdo de lignina.
Ricardo Borges Pereira, Mário Lúcio Vilela de Resende, Pedro Martins Ribeiro Júnior, Daniel Rufino Amaral, Gilvaine Ciavareli Lucas, Fábio Rossi Cavalcanti   +5 more
doaj   +1 more source