scholarly journals Drying of acerola residues in a roto-aerated dryer assisted by infrared heating

2018 ◽  
Author(s):  
P.B. Silva ◽  
G. D. R. Nogueira ◽  
C. R. Duarte ◽  
Marcos A.S. Barrozo
Keyword(s):  
Phenolic Compounds ◽  
Vitamin C ◽  
Research Group ◽  
Good Alternative ◽  
Infrared Heating ◽  
Tropical Fruit ◽  
Malpighia Emarginata ◽  
Drying System ◽  
Pre Treatment ◽  
Infrared Lamps

Acerola (Malpighia emarginata D.C.) is a tropical fruit which has attracted recent industrial interest, due to its high levels of bioactive compounds and vitamin C. However, acerola processing generates a substantial amount of wastes, which can represent up to 40% of total processed volume. The drying of acerola residues in a new dryer, developed by our research group, named as roto-aerated dryer, has been investigated. This dryer provides a better fluid-particle contact than the conventional rotatory dryer. A pre-drying system with infrared lamps has been installed in the feed of this new dryer. The effect of the pre-treatment of this fruit residues with ethanol was also investigated. The results shown that the roto-aerated dryer assisted by infrared radiation hybrid combined with a pre-treatment with ethanol is a good alternative for processing fruit residues, aiming their reuse. It was possible to identify conditions under which the phenolic, flavonoid, and antioxidant capacity presented high levels after drying. The main phenolic compounds were idenfied by HPLC.Keywords: Drying; roto-aerated dryer; infrared; acerola  

Chemical Composition and Antioxidant Activity of Juices from Mature and Immature Acerola (Malpighia emarginata DC)

2005 ◽  
Vol 11 (4) ◽  
pp. 315-321 ◽  
Author(s):  
A. M. Righetto ◽  
F. M. Netto ◽  
F. Carraro
Keyword(s):  
Antioxidant Activity ◽  
Ascorbic Acid ◽  
Chemical Composition ◽  
Phenolic Compounds ◽  
Methyl Linoleate ◽  
Vitamin C ◽  
Hplc Analysis ◽  
Syringic Acid ◽  
Coumaric Acid ◽  
Malpighia Emarginata

Chemical composition and antioxidant activity of juice from immature and mature acerola and of concentrated juice from immature acerola were determined. Tartaric, malic and citric acids and a high content of ascorbic acid were found in all the juices. Vitamin C contents were 4.80, 1.90 and 0.97 g/100 g for the concentrated immature, the immature, and the mature acerola juices respectively. The total phenol contents decreased during ripening, from 3.8 mg of catechin/g for immature acerola juice to 1.4 mg of catechin/g for mature acerola juice. The concentrated immature juice had a content of 9.2mg of catechin/g of juice. Catechin, gallic acid, coumaric acid, syringic acid, caffeic acid and ferrulic acid were detected in immature acerola juice by HPLC analysis whereas mature acerola juice showed only one predominant peak with a retention time similar to that of ferrulic acid. The concentrated juice from immature acerola reduced the oxidation of methyl linoleate by 57.2% while the juice from immature acerola reduced the oxidation by 28.1%. These results stated that the antioxidant potential of the acerola juice depended on its content of phenolic compounds and the vitamin C.

scholarly journals Sustainable Processing of Floral Bio-Residues of Saffron (Crocus sativus L.) for Valuable Biorefinery Products

Plants ◽  
2021 ◽  
Vol 10 (3) ◽  
pp. 523
Author(s):  
Stefania Stelluti ◽  
Matteo Caser ◽  
Sonia Demasi ◽  
Valentina Scariot
Keyword(s):  
Phenolic Compounds ◽  
Vitamin C ◽  
Antioxidant Properties ◽  
Crocus Sativus ◽  
Extraction Technique ◽  
Ultrasound Assisted Extraction ◽  
Average Value ◽  
Assisted Extraction ◽  
High Yields ◽  
Crocus Sativus L

Tepals constitute the most abundant bio-residues of saffron (Crocus sativus L.). As they are a natural source of polyphenols with antioxidant properties, they could be processed to generate valuable biorefinery products for applications in the pharmaceutical, cosmetic, and food industries, becoming a new source of income while reducing bio-waste. Proper storage of by-products is important in biorefining and dehydration is widely used in the herb sector, especially for highly perishable harvested flowers. This study aimed to deepen the phytochemical composition of dried saffron tepals and to investigate whether this was influenced by the extraction technique. In particular, the conventional maceration was compared with the Ultrasound Assisted Extraction (UAE), using different solvents (water and three methanol concentrations, i.e., 20%, 50%, and 80%). Compared to the spice, the dried saffron tepals showed a lower content of total phenolics (average value 1127.94 ± 32.34 mg GAE 100 g−1 DW) and anthocyanins (up to 413.30 ± 137.16 mg G3G 100 g−1 DW), but a higher antioxidant activity, which was measured through the FRAP, ABTS, and DPPH assays. The HPLC-DAD analysis detected some phenolic compounds (i.e., ferulic acid, isoquercitrin, and quercitrin) not previously found in fresh saffron tepals. Vitamin C, already discovered in the spice, was interestingly detected also in dried tepals. Regarding the extraction technique, in most cases, UAE with safer solvents (i.e., water or low percentage of methanol) showed results of phenolic compounds and vitamin C similar to maceration, allowing an improvement in extractions by halving the time. Thus, this study demonstrated that saffron tepals can be dried maintaining their quality and that green extractions can be adopted to obtain high yields of valuable antioxidant phytochemicals, meeting the requirement for a sustainable biorefining.

scholarly journals In Vivo Protective Effects of Gallic Acid Isolated from Peltiphyllum Peltatum Against Sodium Fluoride-Induced Oxidative Stress in Rat Erythrocytes

2013 ◽  
Vol 64 (4) ◽  
pp. 553-559 ◽  
Author(s):  
Seyed Fazel Nabavi ◽  
Solomon Habtemariam ◽  
Antoni Sureda ◽  
Akbar Hajizadeh Moghaddam ◽  
Maria Daglia ◽  
...  
Keyword(s):  
Oxidative Stress ◽  
Lipid Peroxidation ◽  
Superoxide Dismutase ◽  
Vitamin C ◽  
Gallic Acid ◽  
Sodium Fluoride ◽  
Enzyme Activities ◽  
Control Group ◽  
Rat Erythrocytes ◽  
Pre Treatment

Abstract Gallic acid has been identified as an antioxidant component of the edible and medicinal plant Peltiphyllum peltatum. The present study examined its potential protective role against sodium fluoride (NaF)-induced oxidative stress in rat erythrocytes. Oxidative stress was induced by NaF administration through drinking water (1030.675 mg m-3 for one week). Gallic acid at 10 mg kg-1 and 20 mg kg-1 and vitamin C for positive controls (10 mg kg-1) were administered daily intraperitoneally for one week prior to NaF administration. Thiobarbituric acid reactive substances, antioxidant enzyme activities (superoxide dismutase and catalase), and the level of reduced glutathione were evaluated in rat erythrocytes. Lipid peroxidation in NaF-exposed rats significantly increased (by 88.8 %) when compared to the control group (p<0.05). Pre-treatment with gallic acid suppressed lipid peroxidation in erythrocytes in a dose-dependent manner. Catalase and superoxide dismutase enzyme activities and glutathione levels were reduced by NaF intoxication by 54.4 %, 63.69 %, and 42 % (p<0.001; vs. untreated control group), respectively. Pre-treatment with gallic acid or vitamin C significantly attenuated the deleterious effects. Gallic acid isolated from Peltiphyllum peltatum and vitamin C mitigated the NaF-induced oxidative stress in rat erythrocytes.

scholarly journals Malpighia emarginata DC. bagasse acetone extract: Phenolic compounds and their effecton Spodoptera frugiperda(J.E. Smith) (Lepidoptera: Noctuidae)

2016 ◽  
Vol 76 (1) ◽  
pp. 55-61 ◽  
Author(s):  
Tamara R Marques ◽  
Aline A Caetano ◽  
Dejane S Alves ◽  
Vinicius de O Ramos ◽  
Anderson A Simão ◽  
...  
Keyword(s):  
Phenolic Compounds ◽  
Spodoptera Frugiperda ◽  
Acetone Extract ◽  
Malpighia Emarginata ◽  
Lepidoptera Noctuidae

Diffuse light affects the contents of vitamin C, phenolic compounds and free amino acids in lettuce plants

2019 ◽  
Vol 272 ◽  
pp. 227-234 ◽  
Author(s):  
Patrick Riga ◽  
Leyre Benedicto ◽  
Ángel Gil-Izquierdo ◽  
Jacinta Collado-González ◽  
Federico Ferreres ◽  
...  
Keyword(s):  
Amino Acids ◽  
Phenolic Compounds ◽  
Vitamin C ◽  
Free Amino Acids ◽  
Free Amino ◽  
Diffuse Light

scholarly journals The influence of ethanol on the convective drying and on the nutritional quality of dekopon slices

2018 ◽  
Author(s):  
Ronaldo Elias de Mello-Júnior ◽  
Nathane Silva Resende ◽  
Jefferson Luiz Gomes Corrêa ◽  
Leila Aparecida Salles Pio ◽  
Elisângela Elena Nunes Carvalho
Keyword(s):  
Antioxidant Activity ◽  
Phenolic Compounds ◽  
Vitamin C ◽  
Nutritional Quality ◽  
Quality Parameters ◽  
Nutritional Composition ◽  
Convective Drying ◽  
Total Phenolic ◽  
Drying Time ◽  
Citrus Reticulate

Dekopon or Hallabong (Citrus reticulate “Shiranui”) is a hybrid fruit that belongs to the citrus fruits. The scientific and commercial interests in dekopon is due to its nutritional composition. The objective of the study was to verify the influence of ethanol as a pretreatment in reducing drying time as well as maintaining nutritional quality (vitamin C, total phenolic compounds, and antioxidant activity) of dekopon slices. The drying with ethanol at 70 °C promoted the greatest reduction in drying time, but the processed pretreated samples at 50 °C presented the highest level of nutritional quality parameters. Keywords: drying time; vitamin C; phenolic compounds; antioxidant activity 

scholarly journals Evaluation of different methodologies for the determination of phenolic compounds in tropical fruits

2020 ◽  
Vol 23 ◽  
Author(s):  
Karina Carvalho Guimarães ◽  
Derlyene Lucas Salgado ◽  
Elisângela Elena Nunes Carvalho
Keyword(s):  
Phenolic Compounds ◽  
Vitamin C ◽  
Fruits And Vegetables ◽  
Titratable Acidity ◽  
Natural Antioxidants ◽  
Soluble Solids ◽  
Total Phenolic ◽  
Fast Blue ◽  
Recent Method

Abstract Phenolic compounds are natural antioxidants and can be found with abundance in fruits and vegetables. One of the first methods created for analyzing phenolic compounds was the Folin-Denis method; and hereafter, the Folin Ciocalteu method was developed and recently, one of the most recent method is the Fast Blue. Due to the importance of these compounds in food, this work aimed to determine the total phenolic compounds in three fruits, such as: Passion Fruit, “Palmer” mango and “Pera” orange. In addition, these fruits were analyzed through three different determination methods. Furthermore, the content of vitamin C, soluble solids, titratable acidity and pH of these fruits were evaluated. Based on the results, it was verified that there was no difference among the values of vitamin C, soluble solids and TA in relation to those found in the literature. When comparing the three methods (Fast Blue BB, Folin-Ciocalteu Reagent and Folin-Denis Reagent), the results showed a difference in the phenolic compounds that may be related to the distinct reagents used in each method and its different action.

Acerola – tropikalny owoc z ogromną dawką witaminy C

2018 ◽  
Vol 21 (2A) ◽  
Author(s):  
Jacek Majewski ◽  
Michał Orylski ◽  
Aleksander Całkosiński ◽  
Maciej Majewski
Keyword(s):  
Insulin Resistance ◽  
Cardiovascular Disease ◽  
Antioxidant Activity ◽  
Vitamin C ◽  
Control Group ◽  
Human Immune System ◽  
Good Source ◽  
Tropical Fruit ◽  
Human Immune ◽  
Risk Of Cancer

Acerola is a tropical fruit which contains extremely high amounts of vitamin C. Thanks to that, it is used to produce concentrates of ascorbic acid. Vitamin C is also proven to have impact on human immune system. Additionally, it is a good source of carotene, vitamin A, anthocyanins and other nutrients. Several studies were carried out to establish acerola impact on the metabolism. Among mice it decreased the after-meal glucose level and HbA1c but had no effect on insulin resistance. Another study shows that acerola can contribute to reducing obesity and inflammation thanks to increasing IL-10/TNF ratio. Also, it may lead to decrease the risk of cancer or cardiovascular disease thanks to having strong antioxidant activity. Mice given acerola had decreased level of fatigue and could withstand longer periods of activity compared to control group. All those features of acerola are available if it is processed shortly after being collected and is not exposed to heat.

scholarly journals ANALISA PEMANFAATAN KOMPOS SEBAGAI MEDIA BIOCOVER DI TEMPAT PEMROSESAN AKHIR SAMPAH: Studi Kasus Kota Depok, Jawa Barat

REAKTOR ◽  
2014 ◽  
Vol 15 (2) ◽  
pp. 117
Author(s):  
Gabriel Andari Kristanto ◽  
Dwi Rahayu ◽  
Evy Novita
Keyword(s):  
Methane Emission ◽  
Urban Areas ◽  
Organic Waste ◽  
Good Alternative ◽  
Waste Processing ◽  
Maturation Process ◽  
Compaction Rate ◽  
Process Study ◽  
Mature Compost ◽  
Pre Treatment

High percentage of organic waste in urban areas makes composting as good alternative in waste processing. However, composting has not been effectively used and the result is not optimal. Previous studies found compost can be used as biocover media to reduce methane emission landfill. The objective of the study is to identify the characteristic of produced at temporary waste unit Depok, West Java and the effect of compaction toward the amount of methane removal in the landfill. Before applied as biocover media, compost was characterized followed by maturation process. Study on methane removal efficiency was conducted as batches in four reactors for 35 days with compaction rate varying from 750, 800, 850 dan 900 kg/m3. Composting media used in the research had 80 cm thickness with artificial gas consisting of 50% CH4 dan 50% CO2. Initially, compost did not meet criteria as mature compost based on SNI 19-7030-2004, and as media biocover hence a pre-treatment was needed to improve the quality compost to meet the requirements. Compaction rate of 900 kg/m3has highest elimination capacity of methane i.e. 98,31%±3,6% and 13,98±4,32 g/m3/hour.

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