scholarly journals Ripening and fruit quality of ‘Fortune’ plums treated by pre-harvest application of ripening stimulants

2021 ◽  
Vol 10 (17) ◽  
pp. e115101724098
Author(s):  
Carine Cocco ◽  
Wendel Paulo Silvestre ◽  
Gabriela Weber Schildt ◽  
Felipe Afonso Tessaro
Keyword(s):  
Phenolic Compounds ◽  
Boric Acid ◽  
Titratable Acidity ◽  
Soluble Solids ◽  
Total Phenolic ◽  
Fruit Firmness ◽  
Randomized Design ◽  
Common Strategy ◽  
Total Anthocyanins ◽  
Solids Content

The use of plant growth regulators that increase ethylene production is a common strategy to anticipate fruit ripening, increase peel color, and reduce the number of collections to complete the harvest of the fruits. Besides, this strategy may come true as a helping technique for the farmers to reduce costs with manpower, increasing overall profitability. This work aimed to evaluate the application of several concentrations of ethephon, associated with boric acid, on the anticipation of ripening of ‘Fortune’ plums, cultivated in Serra Gaúcha region, South Brazil. The study was carried out in a commercial orchard during the 2018-2019 and 2019-2020 harvests. It was used a completely randomized design with six treatments and four replicates; each replicate was composed of four plants. The following parameters were evaluated: the amount of fruits collected in each harvest, average fruit mass, diameter, length, firmness, soluble solids content, titratable acidity, SS/TA ratio, total phenolic compounds, and total anthocyanins. According to the results, the application of ethephon was capable of hastening and homogenizing partially plum ripening, but it also caused a reduction of anthocyanin and phenolic compounds contents and fruit firmness. On the other hand, the application of boric acid increased fruit firmness. From an economic standpoint, the pre-harvest application of ethephon may be interesting to reduce manpower requirements during harvest by an earlier harvest and by reducing the number of harvest cycles.

scholarly journals Phenolic compounds and phytochemicals in fruits of black mulberry (Morus nigra L.) genotypes from the Aegean region in Turkey

2018 ◽  
Vol 30 (1) ◽  
pp. 93-101 ◽  
Author(s):  
Volkan Okatan
Keyword(s):  
Phenolic Compounds ◽  
Vitamin C ◽  
Antioxidant Capacity ◽  
Phenolic Content ◽  
Titratable Acidity ◽  
Soluble Solids ◽  
Total Phenolic ◽  
Morus Nigra ◽  
Almost Everywhere ◽  
Solids Content

Abstract Turkey is one of the most important centres of mulberry genetic resources and mulberries grow naturally almost everywhere in Turkey. This study was carried out to determine the most important phenolic compounds and phytochemical properties of mulberry (Morus nigra L.) genotypes collected from natural resources in 2016-2017 in the province of Uşak (Turkey). The investigated biochemical characteristics included: total soluble solids content (TSS), pH, titratable acidity, total phenolic content, vitamin C and antioxidant capacity (DPPH). The highest values of phenolic compounds, i.e. ellagic acid, rutin, quercetin, gallic acid, catechin, chlorogenic acid and caffeic acid, were as follows: 5.89, 133.60, 11.25, 40.90, 10.54, 97.59 and 21.93 g 100 g−1, respectively. The highest values of total phenolics, vitamin C content and antioxidant capacity determined in the investigated mulberry genotypes were 2977.30 mg GAE g−1, 31.34 mg 100 g−1 and 26.80%, respectively. The genotypes 64USA08, 64USA06 and 64USA10 can be recommended in terms of the most valuable chemical composition and used for future breeding purposes. It is desirable to take steps to implement an intensive programme for the preservation of Morus nigra L. biodiversity in Turkey.

scholarly journals Production, physicochemical quality and antioxidant capacity of ‘Niagara Rosada’ grape grafted on different rootstocks

2020 ◽  
Vol 36 (6) ◽  
Author(s):  
Bruna Thaís Ferracioli Vedoato ◽  
Francisco José Domingues Neto ◽  
Adilson Pimentel Junior ◽  
Ana Paula Maia Paiva ◽  
Marlon Jocimar Rodrigues da Silva ◽  
...  
Keyword(s):  
Antioxidant Activity ◽  
Phenolic Compounds ◽  
Titratable Acidity ◽  
Soluble Solids ◽  
Total Phenolic ◽  
Soluble Solids Content ◽  
Total Phenolic Compounds ◽  
Production Cycles ◽  
Solids Content ◽  
Niagara Rosada

The objective of this study is to evaluate the effect of rootstocks on grape production, quality and antioxidant capacity of ‘Niagara Rosada’ grape in two productive cycles. The work was developed in Jundiaí-SP, Brazil (26° 06’ S, 46° 55’ W and an average altitude of 745 m). The experimental design was in randomized blocks with subdivided plots, the plots being represented by the rootstocks and the subplots by the production cycles, with four replications, each consisting of 6 plants. The treatments consisted of a combination of ‘IAC 313 Tropical’, ‘IAC 572 Jales’, ‘IAC 571-6 Jundiaí’, ‘IAC 766 Campinas’ and ‘106-8 Mgt’ as rootstocks and ‘Niagara Rosada’ as graft, and the production cycles were 2013 and 2014. The number of bunches, production and productivity of the vines, the physical characteristics of bunches, berries and stalks and the physicochemical composition of the must (soluble solids content, titratable acidity, pH and the relation soluble solids/titratable acidity) were evaluated in production cycles of 2013 and 2014). The content of chlorophylls, anthocyanins, carotenoids, flavonoids and total phenolic compounds and the antioxidant activity of grapes were also evaluated in grape berries. The rootstocks did not influence the production and physical quality of ‘Niagara Rosada’ grapes. As for the chemical characteristics, rootstocks only had an effect on solids content, and ‘IAC 766’ and ‘106-8 Mgt’ rootstocks promoted higher values of this characteristic. Likewise, the total phenolic compounds and the antioxidant activity of the grapes were not influenced by the studied rootstocks. The vines in 2013 presented higher production and better physical characteristics of the grapes, however, the soluble solids content in this cycle was lower than in 2014.

scholarly journals PHYSICOCHEMICAL CHARACTERISTICS, ANTIOXIDANT CAPACITY AND PHENOLIC COMPOUNDS OF TOMATOES FERTIGATED WITH DIFFERENT NITROGEN RATES

2017 ◽  
Vol 30 (1) ◽  
pp. 237-243 ◽  
Author(s):  
MARCOS FILGUEIRAS JORGE ◽  
◽  
KAMILA DE OLIVEIRA DO NASCIMENTO ◽  
JOSÉ LUCENA BARBOSA JUNIOR ◽  
LEONARDO DUARTE BATISTA DA SILVA ◽  
...  
Keyword(s):  
Phenolic Compounds ◽  
Antioxidant Capacity ◽  
Titratable Acidity ◽  
Soluble Solids ◽  
Fecal Coliforms ◽  
Total Phenolic ◽  
Frap Assay ◽  
Antioxidant Capacities ◽  
Microbiological Characteristics ◽  
Nitrogen Rates

ABSTRACT The objective of this work was to evaluate the physicochemical and microbiological characteristics, antioxidant capacity and phenolic compounds of organic cherry tomatoes grown under fertigation with organic dairy cattle wastewater (DCW) with different nitrogen rates. Tomato plants, grown in an agroecological farm in Seropédica, State of Rio de Janeiro, Brazil, were subjected to four different nitrogen rates (T1=0, T2=50, T3=100 and T4=150% of N). The moisture, lipids, ashes, protein and total fiber contents, soluble solids (ºBrix), reducing and total sugars (%), pH and total titratable acidity (mg NaOH per 100 g) were evaluated. The total phenolic content (TPC) and the antioxidant capacity was determined by the DPPH and FRAP methods. The different nitrogen rates (%N) affected the pH, protein and soluble solids contents. The increase in %N increased the antioxidant capacities, according to the DPPH assay, and TPC. On the other hand, the tomatoes under fertigation with the highest %N presented lower antioxidant capacities according to the FRAP assay. The fertigation did not affect the microbiological characteristics of the tomatoes, which presented fecal coliforms count <3 NMP g-1 and absence of Salmonella in 25 g.

scholarly journals Evaluation of fermented tea (kombucha) quality

2020 ◽  
Vol 26 (4) ◽  
Author(s):  
Vanesa Šliažaitė ◽  
Aurelija Paulauskienė ◽  
Aurimas Krasauskas
Keyword(s):  
Antioxidant Activity ◽  
Acetic Acid ◽  
Sensory Evaluation ◽  
Total Content ◽  
Titratable Acidity ◽  
Soluble Solids ◽  
Total Phenolic ◽  
Soluble Solids Content ◽  
Fermentation Conditions ◽  
Solids Content

The research was done at Aleksandras Stulginskis University (Vytautas Magnus University Agriculture Academy since 2019) in 2017–2018. The research object was kombucha beverage brewed from Camellia sinensis L. black, green, oolong, pu-erh tea and fermented for 9 and 22 days by microorganisms at different room lighting conditions. The soluble solids content, active acidity and titratable acidity were determined in teas fermented for 22 days. The total amount of phenolics compounds, antioxidant activity, yeast colonies and sensory evaluation of tea were determined in teas fermented for 9 days. The research results showed that the quality of fermented tea was dependent on the tea species, but fermentation conditions were not essential. During the fermentation the soluble solids content of tea decreased by an average of 0.60% and the content of acetic acid increased by 0.34%. The highest content of acetic acid was found on the 22nd day of fermentation in all species of teas. The active acidity (pH) of all investigated species of teas decreased significantly during the fermentation process. The total content of phenolic compunds in all species of teas during the fermentation increased from 20 to 57% regardless of fermentation conditions. The highest content of total phenolic compounds was established in teas fermented for 9 days. The antioxidant activity of teas fermented for 9 days varied depending on the fermentation conditions. For black and green teas fermented in the light the antioxidant activity decreased, for oolong and pu-erh teas fermented in the dark the antioxidant activity increased. The number of yeast colonies increased in all tea samples during the fermentation. The best taste was fixed for pu-erh tea, which scored the highest (11.4) in sensory evaluation.

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.

scholarly journals Influence of stock on physical and chemical traits of fresh apricot fruit

2013 ◽  
Vol 27 (1) ◽  
pp. 111-114 ◽  
Author(s):  
T. Milošević ◽  
N. Milošević ◽  
I. Glišić ◽  
G. Šekularac
Keyword(s):  
Titratable Acidity ◽  
The Other ◽  
Soluble Solids ◽  
Fruit Firmness ◽  
Soluble Solids Content ◽  
Total Sugars ◽  
Solids Content ◽  
Chemical Traits ◽  
Physical And Chemical ◽  
Fruit Mass

Abstract The study was conducted to determine the effects of Myrobalan rootstock and Blackthorn interstock on fruit physical and chemical traits of five apricot cultivars. The results showed that cultivars grafted on Myrobalan rootstock appear to induce a higher fruit mass when compared with the Blackthorn interstock. Blackthorn interstock showed a tendency to induce a higher soluble solids/titratable acidity ratio than Myrobalan. Values of soluble solids content, total sugars, titratable acidity and fruit firmness between Myrobalan rootstock and Blackthorn interstock were not significant. Regarding cultivars, the greatest fruit mass observed in Roxana in both treatments, and the lowest in Biljana on Myrobalan and in Vera on Blackthorn. The lowest soluble solids, total sugars and soluble solids/titratable acidity ratio were found in Roxana in both variants of grafting, whereas the greatest titratable acidity also observed in Roxana in both cases, respectively. Based on the results from this study, the fruits of Roxana can be recommended for fresh consumption, whereas fruits of the other cultivars can be recommended for processing.

scholarly journals Ripe Ora-pro-nobis (Pereskia aculeata miller) fruits express high contents of bioactive compounds and antioxidant capacity

2018 ◽  
Vol 40 (3) ◽  
Author(s):  
Aline Priscilla Gomes da Silva ◽  
Poliana Cristina Spricigo ◽  
Thais Pádua de Freitas ◽  
Thiago Machado da Silva Acioly ◽  
Severino Matias de Alencar ◽  
...  
Keyword(s):  
Phenolic Compounds ◽  
Antioxidant Capacity ◽  
Bioactive Compounds ◽  
Titratable Acidity ◽  
Soluble Solids ◽  
Total Phenolic ◽  
Maturity Stage ◽  
Total Phenolic Compounds ◽  
Total Carotenoids ◽  
Significant Difference

Abstract Pereskia aculeata Miller is a native cactaceae found from the Northeast to the South of Brazil. This plant is recognized by the high nutritional value of their leaves, which are the most used in cooking and folk medicine. However, studies on the chemical characteristics and antioxidant capacity of the ora-pro-nobis fruits are scarce. Therefore, the aim of this study was to determine the best harvest point of the ora-pro-nobis fruits to optimize the content of bioactive compounds and their antioxidant capacity. The fruits were manually harvested, defined by their peel colors in three maturity stages: unripe (green), intermediate (yellowish green), and ripe (yellow) stages. The following attributes were evaluated: soluble solids (SS), titratable acidity (TA), SS/TA ratio, pH, and content of bioactive compounds, such as total chlorophylls, carotenoids, yellow flavonoids, total phenolic compounds, and antioxidant capacity. There was a decrease in the content of chlorophyll followed by an increase in the of total carotenoids and yellow flavonoids, due to the maturity stage. For the total phenolic compounds, it was not observed significant difference between the stages. The antioxidant capacity was quantified by the ORAC method in lyophilized pulp in the unripe (1.95 mmol 100 g-1 trolox) and ripe (3.85 mmol 100 g-1 trolox) stages. The lowest contents were observed in the intermediate (0.80 mmol 100 g-1 trolox in lyophilized pulp) stage. The maturity stage significantly influenced the bioactive compounds of ora-pro-nobis, which presented higher values of total carotenoids, yellow flavonoids, and antioxidant capacity in ripe fruits.

scholarly journals Post harvest evaluation of physical-chemical parameters of mechanically damaged Tahiti acid limes

2010 ◽  
Vol 1 (2) ◽  
pp. 79
Author(s):  
Michel Shoiti Tamura ◽  
Roselene Ferreira Oliveira ◽  
Simone Correia Molina ◽  
Edmar Clemente
Keyword(s):  
Titratable Acidity ◽  
Soluble Solids ◽  
Chemical Parameters ◽  
Post Harvest ◽  
Physical Chemical ◽  
Randomized Design ◽  
Significant Difference ◽  
Completely Randomized Design ◽  
Solids Content

<p>From harvest to consumption, fruit and vegetables suffer a series of mechanical damages which, depending on their sensitiveness, may cause damages that put their final quality at risk. This work had as its objective evaluate the post harvest quality of mechanically damaged &lsquo;Tahity&rsquo; acid limes. The experiment was carried out in a completely randomized design, with 3 repetitions and 7 fruits per treatment, mechanical damages were then evaluated by cutting and impacting in comparison to healthy fruits (control), and maintained for periods of 0, 3. 6, 9, 12, 15 and 18 days, thus obtaining a 3 x 7 factorial experiment. Analyses were made throughout the 18 days, so as to determine the total soluble solids content (expressed in &deg;Brix); titratable acidity (in g of citric acid. 100mL<sup>-1</sup>); ratio (relationsoluble solids and titratable acidity); vitamin C (expressed in mg of ascorbic acid 100mL<sup>-1</sup>) and pH. The results obtained showed that there was significant difference in the chemical parameters evaluated, mainly those submitted to damaging treatment.</p><p>&nbsp;</p><p>DOI: http://dx.doi.org/10.14685/rebrapa.v1i2.20</p>

scholarly journals Postharvest Quality of Grape Tomatoes Treated with 1-Methylcyclopropene at Advanced Ripeness Stages

HortScience ◽  
2006 ◽  
Vol 41 (1) ◽  
pp. 183-187 ◽  
Author(s):  
Muharrem Ergun ◽  
Steven A. Sargent ◽  
Donald J. Huber
Keyword(s):  
Ethylene Production ◽  
Titratable Acidity ◽  
Soluble Solids ◽  
Postharvest Quality ◽  
Fruit Firmness ◽  
Soluble Solids Content ◽  
Respiration Rates ◽  
Total Titratable Acidity ◽  
Solids Content

Grape tomatoes (Lycopersicon esculentum Mill. `Santa') harvested at light-red (>90% color) and full-red stages were treated with 1 μL·L–1 1-methylcyclopropene (1-MCP) for 24 hours at 20 °C and stored at 20 °C. After 1 day of storage, fruit harvested at light-red stage treated with 1-MCP had a 56% lower respiration rate than untreated fruit. By day 7, respiration rates of the two treatments had converged at about 2 mL·kg–1·h–1. Ethylene production of light-red stage tomatoes treated with 1-MPC was 24% lower than untreated during storage, with rates converging by day 11. For fruit harvested full-red, 1-MCP had similar effects on respiration and ethylene production, although convergence occurred earlier, by day 5. Subsequent tests were conducted only with fruit harvested at full-red stage, since fruit harvested at the light-red stage had lower soluble solids content (4.3%) than fruit harvested at the full-red stage (5.5%). Several combinations of 1-MCP concentrations and exposure times were applied at 20 °C: 1 μL·L–1 for 24 h, 5 μL·L–1 for 6 or 12 h, 25 μL·L–1 for 6 or 12 h, and 50 μL·L–1 for 6 or 12 h; following the respective pretreatment fruits were stored at 20 °C. 1-MCP pretreatment extended marketable life by 1 d, irrespective of pretreatment regime, where untreated and pretreated fruit remained marketable (<15% of fruit soft, decayed and/or shriveled) for 6 and 7 d, respectively. However, 1-MCP did not affect whole fruit firmness, epidermal color, internal color, soluble solids content (6.5%), total titratable acidity (0.64%), or pH (4.3). In a third test simulating commercial handling procedures, full-red harvested tomatoes were treated with 1 μL·L–1 1-MCP for 24 h at either 13 or 20 °C, stored for 4 d at 13 °C, and then transferred to 20 °C. Under these conditions, marketable life for untreated and 1-MCP-treated tomatoes was 7 and 8 d, respectively.

scholarly journals Cambuci: a native fruit from the Brazilian Atlantic forest showed nutraceutical characteristics

2018 ◽  
Vol 40 (5) ◽  
Author(s):  
Tatiane de Oliveira Tokairin ◽  
Aline Priscilla Gomes da Silva ◽  
Poliana Cristina Spricigo ◽  
Severino Matias de Alencar ◽  
Angelo Pedro Jacomino
Keyword(s):  
Ascorbic Acid ◽  
Phenolic Compounds ◽  
Atlantic Forest ◽  
Titratable Acidity ◽  
Soluble Solids ◽  
Total Phenolic ◽  
Brazilian Atlantic Forest ◽  
Fruit Pulp ◽  
Total Phenolic Compounds ◽  
Fresh Weight

Abstract The Atlantic Forest is recognized as a biome rich in biodiversity. Cambuci trees (Campomanesia phaea) produce fruits that may be consumed as both fresh and processed forms but are still underutilized. The aim of this study was to describe the physicochemical characteristics and bioactive compounds in cambuci fruits from Brazilian Atlantic Forest, located at Natividade da Serra-SP, Brazil. Cambuci fruits of the fifty-nine accessions were characterized according to fresh weight, pulp yield, peel percentage, longitudinal and transversal diameters (LD and TD, respectively), pH, soluble solids content (SSC), titratable acidity (TA), SSC/TA ratio, ascorbic acid, total phenolic compounds content, and antioxidant activity using the DPPH assay. The soluble solids contents varied from 5.10 °Brix to 11.00 °Brix. The titratable acidity varied from 1.29 to 2.90 g citric acid 100 g-1. Ascorbic acid content was of 31.12 to 139.38 mg 100 g-1. Total phenolic compounds varied from 330.5 mg GAE 100 g-1 to 3,526.04 mg GAE 100 g-1. The antioxidant activity was of 65.03 µmol Trolox g-1 fruit pulp (fresh weight) to 199.78 µmol Trolox g-1 fruit pulp (fresh weight), a factor of 6.7 difference between the extremes. These results showed cambuci fruits presented as rich source of ascorbic acid, total phenolic compounds, and with high antioxidant capacity.

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