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The antioxidant power of eugenol and vitamin C was examined by analyzing the ability of these ligands to bind to the NADPH oxidase protein target and evaluating their bond interactions with critical residues. The results confirm that docked ligands are more stable in the specified active region of 2CDU during a MD simulation of 100 ns and 2CDU protein-ligand interactions with docked ligands showed significant hydrogen bond, hydrophobic, and water bridge formation. Eugenol exhibits hydrogen bond interactions with critical residues in the selective pocket in comparison to vitamin C. Also, eugenol had a similar binding orientation and very considerable stability in the selective pocket of 2CDU with a high binding energy with lipophilic energy. The electrostatic potential maps indicate that for eugenol, the –OH and –OCH3 sites, while that the –OH and –CO functional groups in vitamin C are responsible of the antioxidant activities of these compounds. HAT and SET mechanisms suggest that eugenol may become a better antioxidant than vitamin C.

Copyright of Revista Colombiana de Investigaciones Agroindustriales is the property of Revista Colombiana de Investigaciones Agroindustriales del Centro Agropecuario Sena Buga and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Vitamin C is of great importance for the body, being necessary for the formation of blood vessels, cartilage, muscle, collagen and for the healing process, so its deficiency in the body, known as hypovitaminosis C, can cause problems such as anemia, bleeding gums, bruising and poor healing. Thus, the present work, through a bibliographic review of scientific articles found on digital platforms, seeks to talk about the role and use of ascorbic acid (AA); Talking about the history of vitamin C, its effects on tissue metabolism, as well as presenting the pharmacological application of vitamin C, addressing its effects on the body, emphasizing the importance of daily use of this vitamin and its benefits for human life and health, in order to inform society about the benefits linked to its use as well as to warn of the risks of lack of this vitamin. Taking into account what was observed, it was possible to perceive the importance of the need to maintain a healthy diet rich in vitamin C, since a deficient diet of this vitamin can cause tiredness, weakness, irritation while a more severe deficiency can cause scurvy. With this, it is essential to look for a competent professional so that he can make the diagnosis, and if it is necessary to use food supplementation of this vitamin via medication. [ABSTRACT FROM AUTHOR]

ABSTRACT: This study evaluated different meta-analytical approaches tousing citric and ascorbic acids in the performance of nursery piglets. The study included 24 publications between 1985 and 2018 (mode 1998), totaling 4215 nursery piglets. The Higgins index indicated high heterogeneity (98.5%) among the studies concerning citric acid (96.9%) and ascorbic acid (91.4%). In variances and forest plot analysis, using citric and ascorbic acids and their analogs was no significant effect (P > 0.05) on piglet weight gain. In the meta-analysis approach proposed by LOVATTO et al. (2007) and SAUVANT et al. (2008), there was no significant effect (P > 0.05) of the addition of citric and ascorbic acids on piglet performance. Numerically, was observed an increased ADG (Δ > 0) related to acids (supplemented over control treatments) in 59.7% (ascorbic acid) and 46.6% (citric acid) of the ADG comparisons. The effect of ascorbic supplementation on the respective control treatment of the overall nursery period was on average 0.98%, 1.07%, and -1.3% for ADFI, ADG, and FCR, respectively. Citric acid supplementation to the respective control treatment of the overall nursery period was on average 1.67%, 4.40%, and -2.29% for ADFI, ADG, and FCR. Adding citric and ascorbic acids in diets for nursery piglets does not alter performance regardless of the meta-analysis method used.

Background: Heat treatment is one of the most used methods to preserve food, such as orange juice, increasing its shelf life. However, little is known about the temperature and speed profiles during heat treatment of liquid food in commercial packaging. Aim: This work aimed to determine the vitamin C content and the convective heat transfer coefficient in the pasteurization of orange juice. Methods: Two tests were performed: in test 1, the heating started with a water bath at 22 ºC and was heated to 80 ºC. In test 2, the water bath started at 80 ºC. Results and Discussion: The convective heat transfer coefficient was analyzed in the wall region, and it is higher in test 2. In both tests, the curve graphic profile follows the same literature trend. Regarding vitamin C, in test 1, there was a reduction in it. In test 2, it remained constant. Conclusions: Studying the thermal behavior of orange juice is extremely important to ensure its quality. In order to avoid this degradation and reduce its loss, it is necessary that in thermal treatments, rapid heating is carried out and that the juice has low exposure to air and heat at the time of its preparation. [ABSTRACT FROM AUTHOR]

The fruit of the butia palm [Butia odorata (Barb. Rodr.) Noblick] has cultural and economic value for the inhabitants of the protected landscape area in Los Palmares de Rocha, Uruguay. Determining the physicochemical and nutritional quality of the fruits can contribute to enhance them by preserving these biosystems. This study aimed to characterize fruits with red, orange and yellow epicarp physically and chemically. Color, dry matter, ash, crude protein, dietary fiber, carotenoids, vitamin C, total polyphenols (TP), and total antioxidant capacity were measured in peel and pulp of the three types of fruit. All data were reported for 100 g of fresh weight. Furthermore, the pH, the titratable acidity and the total soluble solids were determined in the pulp juice. The three types of butia had a higher content of β-carotene (≈1.28 mg), lutein (≈68.2 µg) and TP (≈647.7 mg gallic acid equivalent) in peel than in pulp. In addition, the content of vitamin C (≈48.7 mg) and dietary fiber (≈ 7.1 g) was similar in the peel and in the pulp for the three colors of butia. Intake of 100 g of butia fruits in natura would provide up to 14% of the dietary fiber, 8% β-carotenes and 57% of the vitamin C required daily by an adult.

Copyright of Revista Brasileira de Prescrição e Fisiologia do Exercício is the property of Instituto Brasileiro de Pesquisa e Ensino em Fisiologia do Exercicio and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

La ostra del Pacífico Crassostrea gigas es uno de los moluscos con mayor producción a escala global y el éxito de su cultivo depende principalmente de la producción de semillas bajo condiciones controladas, siendo la calidad del agua utilizada un factor preponderante. Se evaluó la producción de postlarvas, tanto en el desarrollo larvario como en etapa postlarvaria temprana, bajo distintos tratamientos físicos y químicos comúnmente utilizados en el cultivo de invertebrados, teniendo como base la filtración y exposición del agua a la luz ultravioleta-UV (tratamiento 1-control) y sus variantes con adición de: hipoclorito + tiosulfato, hipoclorito + vitamina C, hipoclorito + tiosulfato + ácido etilendiamino tetraacético-EDTA, hipoclorito + tiosulfato + vitamina C + EDTA y antibiótico oxitetraciclina. Los resultados en menor tiempo del desarrollo larvario, mayor tasa de crecimiento y talla de larvas competentes demuestran la eficacia del tratamiento físico del agua filtrada e irradiada con UV en flujos de 10 L min, y de la terapia basada en oxitetraciclina para aumentar la supervivencia, así como también afectar positivamente en la tasa de asentamiento; sin embargo, no recomendamos el uso de antibióticos en la producción de semillas de C. gigas, por generar menor condición fisiológica de las larvas (retardo de 2 días en el desarrollo larvario) y sus efectos de crear resistencia dentro y fuera de la hatchery. Se recomienda para la producción de postlarvas de C. gigas el uso del agua filtrada hasta 1 µm y posterior exposición a luz UV, así como estudios para la búsqueda de alternativas de desinfección o fortalecimiento inmunológico con el uso de productos naturales y probióticos para la optimización del desarrollo larvario y postlarvario.

ABSTRACT This study aimed to evaluate the addition of Vitamin C, reduced Glutathione and trolox on sperm characteristics of pork refrigerated semen. Six pigs were collected through the technique of gloved hand (10 ejaculates/animals). The semen was diluted in MR-A®. After the previous evaluations, the treatments were added: Control group: diluent only; Vitamin C Group: 200μM/mL Vitamin C; Trolox Group: 200μM/mL Trolox; Glutathione group: 2.5mM/ml Reduced glutathione. The semen was stored in thermal boxes and placed inside the refrigerator at 15oC and evaluated at D0, 12, 48, 72 hours. After 30 hours of incubation, each treatment was divided into two equal fractions and the same concentration of antioxidants was added in one of the parts. The results show that reduced glutathione supplementation preserves sperm motility after 24 hours but also has a higher percentage of acrosome intact in the presence of this antioxidant. There was no effect of adding a second dose of the antioxidants. In conclusion, the addition of reduced Glutathione to the swine semen diluent is a promising alternative for better preservation of sperm characteristics and the addition of the second dose of antioxidants during storage is detrimental to semen.

This work evaluates the physical and physicochemical parameters of the "Festival" strawberry variety, obtained under the edaphoclimatic conditions of Humpata, Province of Huila, Angola, followed by its transformation into sweet of adequate quality. The analyzes carried out were: the mass was determined on analytical balance and the transversal and longitudinal diameters with a caliper. Other analyzes were: total acidity titratable by volumetry, pH by potentiometry, total soluble solids by refractometry, moisture and ash by gravimetry. The study carried out showed that the pH of the pulp was 3.41; and in the sweet it was 3.31. The titratable acidity in the strawberry pulp was 0.186 g/100 ml and in the sweet 0.096 g/100 ml; the ascorbic acid content in the pulp was 18.60 mg/100g. The average content of soluble solids in the pulp was 9.51°Brix and for the sweet 68.83°Brix. These chemical characteristics of the pulp and the sweet provide information about their nutritional values. [ABSTRACT FROM AUTHOR]

The study aimed to describe the knowledge of the members of the Butia Palm Groves Network about the properties of butiá that are beneficial to health. It was a qualitative research, with a descriptive approach, with data collection in March and April of 2020. Semistructured interviews were applied to 20 key members of the Rota dos Butiazais. The interviews were applied in person to nine people (recorded and transcribed by the researcher) and via e-mail to 11 participants (due to the social distance, imposed by the pandemic of Covid-19). Thematic content analysis by Laurence Bardin and the theoretical framework of the Theory of Social Representations by Serge Moscovici were used. Participants reported on the antioxidant compounds, fibers, carotenes, vitamins and potassium present in the butiá pulp, stating that these compounds bring benefits for health. They also mentioned that butiá has a nutritional value, is rich in vitamin C, and that there may be properties that have not been studied. Each interviewee has a distinct personal and family history, but they converge on several points related to the knowledge related to the properties of butiá. The participants' reports demonstrate the social representations based on the butiá. [ABSTRACT FROM AUTHOR]

The research analyzed the production, commercialization and consumption of unconventional food plants (PANC) at fairs in São Luís (MA) and the chemical composition of the species Hibiscus sabdariffa L. (vinagreira) and Talinum paniculatum (Jacq.) Gaertn (joão-gome). Questionnaires were applied to three priority groups: marketers, consumers and producers, asking about their knowledge related to PANC, financial return, benefits, planting and frequency of consumption. The chemical parameters analyzed were protein, lipids, fibers, ashes, Brixº, pH, titratable acidity, vitamin C and reducing sugars following different methodologies. The results showed that in the commercial centers of São Luís, the PANC are commercialized and their benefits to health and income generation are recognized by the marketers, producers and consumers, mainly for the female gender. The main responsible for its planting and commercialization are women and the main consumers are adults and the elderly. In the vinagreira, an acidic flavor determined by high pH, titratable acidity and vitamin C was observed. The joão-gome showed little flavor, high content of Vitamin C, protein and fibers. The high protein and fiber content in both species shows the nutritional richness characteristic of PANC. Therefore, the chemical parameters of both species demonstrated the nutritional potential of these plants, justifying their wide use in cooking and traditional medicine in the region. [ABSTRACT FROM AUTHOR]

The production of jams with the addition of residues from fruit processing, such as peels and seeds, can reduce environmental impacts and nutritionally enrich the products. With a view to using the residues from the melon and mandacaru processing, as well as minimizing the postharvest losses of these fruits, the objective was to develop and characterize three formulations of cv. 'Orange Flesh', plus melon peel and mandacaru seeds. The jellies were characterized according to the physical-chemical parameters (pH, total titratable acidity, total sugars, reducing and non-reducing sugars, total soluble solids, water content, water and ash activity) and bioactive compounds (ascorbic acid, total phenolic compounds, total anthocyanins and total flavonoids). From the elaborated jellies it was observed that the formulation with the addition of the cooked melon peels (F3), was the one that obtained the highest levels of bioactive compounds, such as phenolic compounds 39.98 mg 100-1 g-1, however the formulations F2 (melon jelly with 1% mandacaru seeds) and F1 (melon jelly) obtained good results. The melon pulp, its peels and mandacaru seeds proved to be viable alternatives in the production of jams. The incorporation of mandacaru seeds and melon peels contributed to the functionality and attractiveness of the jellies and serves as an alternative for using waste. [ABSTRACT FROM AUTHOR]

Because it is a simple and low-cost process, natural drying, using solar energy and low-cost equipment, becomes a viable and accessible alternative for small rural producers. Guava is a climacteric and highly perishable fruit. The description of the drying process is extremely important to obtain good quality products. This work aimed to develop a low-cost, direct-exposure solar dryer prototype for guava dehydration, in addition to evaluating the efficiency of the process and the physical-chemical quality of the final product. The prototype was developed using alternative and lowcost materials. The efficiency of the process was evaluated through the drying kinetics and the temperature gain of the dryer. The raw material and the final product were evaluated for physical-chemical parameters and color. The drying process made it possible to dry the guava fruits within 15 hours, with an average temperature increase of 19.7°C. The Handerson and Pabis model was the one that best fit to predict the process. Solar drying led to a significant reduction in pH and water content. Regarding acidity and soluble solids content, a significant increase was observed after drying. Regarding vitamin C, there was an increase of about 500% in the concentration in relation to the content of fresh guava. [ABSTRACT FROM AUTHOR]

ABSTRACT Given the potentiality of nanoparticles (NP) to load substances as active principle of drugs, cosmetics and food, there is interest in increasing its production. Particularly in the agroindustrial area, the byproducts are source of functional compounds that must be stabilized by encapsulation, for example, to allow its application. Considering the amount of generated byproducts, it is necessary to understand the encapsulation synthesis in a high scale dimension. In this way, the active compounds vitamin C (from the byproduct of the acerola processing) and polyphenols (from the byproduct of grape processing) were nanoencapsulated into chitosan NP at three reactional volumes: 0.1; 1.0 and 10.0 dm3. The NP were characterized for yield, particle size, morphology, encapsulation efficiency and release profile. In general, the increase in scale did not influence these parameters. It is found a close similarity for NP size value between the 0.1 and 10.0 dm3 reactional volumes. For example, for the blank control, the size was 155±6 and 227±118 nm respectively for 0.1 and 10.0 dm3 reactional volumes. Similarly for the encapsulated acerola byproduct extract (373±44 and 400±83 nm) and ascorbic acid (279±29 and 217±29 nm). For the encapsulated skin grape extract, the size decreased sharply from 1040 to 308 nm. The yield per volume ratio was about 1.3 mg cm-3. Additional analysis for NP with encapsulated skin grape extract, by Scanning Electronic Microscopy, showed uniformly distributed spherical structures and the release profile was similar for all reactional volumes. Thus, the system is suitable for scale-up for NP production.

ABSTRACT Objective: To assess the histopathologic and biomechanical effects of hyaluronic acid (HA) and high-dose vitamin C (VC) on rat Achilles tendon healing. Methods: Forty-eight Sprague-Dawley rats were randomized to HA and VC and control groups with equal numbers. Each group was further divided into two subgroups to be sacrificed on Day 15 (n=8) and Day 30 (n=8). The Achilles tendons were cut and repaired. While the control rats remained untreated, HA and VC were administered after repair. The repaired tendons were removed for biomechanical and histopathologic analyses. In the biomechanical tests, the tendons were stretched to failure and maximum forces were measured. For histopathologic examination, the specimens were interpreted semiquantitatively using Movin’s grading scale and Bonar scores. Results: The highest mean forces were obtained in the HA group on Day 15 and in the VC group on Day 30, with a significant difference between HA and VC on Day 15 between control and VC on Day 30 (p

The study of ionizing irradiation with Cobalt 60 (60Co), in this experiment, aimed to evaluate its influence on postharvest physical parameters for atemoia cv. ‘Thompson’, which are related to the fruit ripening process. The irradiation was carried out at the Radiation Technology Center - CTR IPEN / CNEN - SP, located in the university city USP (University of São Paulo) in the compact multi-purpose radiator where gamma rays are used. Atemias were irradiated with the following doses of cobalt 60 (60Co): T0 = No irradiation (control), T1 = 0.2kGy, T2 = 0.4kGy, T3 = 0.6kGy, T4 = 0.8kGy, T5 = 1,0kGy and T6 = 1,2kGy and then packed in expanded polystyrene trays (2 fruits / tray) and sealed with 0.020mm polyvinyl chloride films; exception made to the control treatment which did not receive irradiation; for each analysis parameter there were three repetitions with two fruits per repetition. The fruits under study were stored in a cold chamber at 15 ± 0.2ºC and 90 ± 2% RH. In all irradiation doses, the following analyzes were carried out: loss of fresh mass, soluble solids (SS), titratable acidity (AT), pH, ascorbic acid (AA), reducing sugars, respiratory rate. The analyzes were analyzed every three days (0,3,6,9,12,15 and 18) days of storage. The experiment was conducted in a completely randomized design (D.I.C.), in a factorial scheme (treatment x storage), composed of seven doses of gamma irradiation and seven storage times. The results were subjected to analysis of variance and the means compared by Tukey's test at the level of 5% probability and regression was performed for the analyzes in the storage period. This experiment can conclude that the doses of 1.0kGy and 1.2kGy demonstrate greater control of breathing, in atemoia, until the 9th day; three days more than the control treatment, the other parameters analyzed did not show any interference in the increase in postharvest life of the atemous cv ‘Thompson’. [ABSTRACT FROM AUTHOR]

Este trabajo tuvo como objetivo la caracterización físico-química de la naranja, variedad Baía, producida en Alto Hama, Angola. Además de la transformación de la fruta en gelatina, mediante un sencillo procedimiento y su caracterización físicoquímica. Trabajamos con 50 kg de fruta. Para la caracterización física se utilizó un calibre y una balanza analítica. En la caracterización físico-química se determinaron los sólidos solubles con un refractómetro. El contenido de ácidos ascórbicos y la acidez total se determinaron mediante titulación con 2,6-diclorofenolindofenol y solución de NaOH 0,1 mol/L respectivamente. La investigación mostró que la fruta se caracteriza por: pH de 3,62; acidez titulable 4,85 g / 100 ml; ácido ascórbico 104,7 mg / 100g y SST de 9,6 °Brix. La gelatina se caracterizó por: pH de 3,58; acidez titulable 0,475 g / 100 ml; ácido ascórbico 13,20 mg / 100g y SST 64,7 °Brix. [ABSTRACT FROM AUTHOR]

The application of technologies such as osmotic dehydration, promotes the reduction of product water in short periods and the improvement of its sensory characteristics. Once the influence of conditions on the efficiency of the osmotic dehydration process of fruits was observed, the objective of this study was to evaluate the effect of temperature and sucrose and xylitol concentrations on osmotic dehydration kinetics, and the effects of complementary microwave drying. on the physical and chemical characteristics of papaya slices. The response surface analysis method was applied through a complete 2? rotational factorial design with 4 axial points and 3 repetitions at the central point, totaling 11 experiments for each osmotic agent, with which it was possible to evaluate the effects of the agent concentration osmotic (sucrose or xylitol) and temperature, in the loss of water from the papaya slices It was found that the ideal condition for carrying out the process was the 50 °Brix concentration of the osmotic agent at a temperature of 30 °C. The slices submitted to osmotic dehydration in these conditions were dried in microwaves and evaluated for their physical and chemical characteristics. The use of xylitol as an osmotic agent was more efficient than sucrose, providing a greater reduction in water, significantly influencing the retention of vitamin C content after microwave drying and presenting a lower water content. [ABSTRACT FROM AUTHOR]

The processing of fresh fruits into derived products provides conservation and consumption outside the harvest period, however, it is important that these products reach the consumer market, attending to and guaranteeing their physical-chemical and functional quality. Thus, the objective of this work was to evaluate physicochemical characteristics and quantification of bioactive compounds in commercial samples of guava and banana sweets, and acerola and guava pulps. The products purchased were represented by four commercial brands, coming from the local markets of Pombal and Patos in Paraíba. Determinations of soluble solids, titratable acidity, pH, ratio, water content, fixed mineral residue, ascorbic acid, chlorophyll, carotenoids, flavonoids, anthocyanins and total extractable polyphenols were carried out. For ash content, sample A of guava jam stood out among the others, indicating a greater amount of inorganic residue. Samples A, B and C of guava jam and sample D of banana jam had the highest content of compounds phenolic. The sweet banana sample C showed the highest content of soluble solids. Acerola pulp sample D obtained the best result for ascorbic acid and phenolic compounds. For pH, only samples B, C and D of guava pulp are within the limits allowed by Brazilian legislation. [ABSTRACT FROM AUTHOR]

The fruits of guava (Psidium guajava L.) are highly appreciated not only for aroma and flavor, but also for nutritional value, being a rich source of vitamin C and can be consumed in natura or in their industrial forms. The objective of this work was to evaluate the performance of guava cultivars, its initial production and its fruit quality in irrigated and non-irrigated environments. Planting was carried out in February 2016, at 2.0 x 4.5 m spacing, with seedlings formed by cuttings from a commercial nursery. The plants were conducted in the espalier system, with regular prunings for fruiting. It was used a complete randomized block design in a 3 x 2 factorial arrangement, with three cultivars (Tailandesa, Século XXI and Pedro Sato) and two production environments (irrigated and non-irrigated). Productive variables (yield per plant and fruit mass) and qualitative variables (pH and total soluble solids content) were analyzed in the first two crop cycles. The yield and mass of fruits of evaluated cultivars were not affected by the additional irrigation of the plants. The irrigation has decreased the pH and the level of soluble solids content of the fruits. The 'Tailandesa' guava cultivar was the one that presented the best productive performance for cultivation in the region of Vera Cruz, SP. [ABSTRACT FROM AUTHOR]

The consumption of fresh fruit is increasing worldwide due to factors that lead to changes in people's eating habits, such as health care and nutritional aspects of food. The present work aimed to evaluate the quality, quantify the bioactive compounds and the antioxidant capacity of noni fruits in five maturation stages. The work was developed in the Laboratory of Technology of Products of Vegetable Origin of the Center of Sciences and Technology of Food of the Federal University of Campina Grande, in the Campus of Pombal - PB. The fruits came from plantations located in the city of Fortaleza - CE, being harvested directly in the canopy of the plant, taking the color of the bark as the harvest index. Physical, physical-chemical evaluations of bioactive compounds and antioxidant capacity in fruits were performed. The experimental design used was completely randomized (p>0.05). Physico-chemical characteristics of soluble solids, total soluble sugars, reducing sugars and SS / AT ratio, increased with advancing maturation. For bioactive compounds, the ascorbic acid content increased considerably with advancing maturation, as well as representative values for phenolic compounds. The fruits studied showed antioxidant properties, increasing the reducing power with ripening. It is concluded that the evaluated fruits presented considerable amounts of biologically active compounds, which can constitute a good source of natural antioxidants. [ABSTRACT FROM AUTHOR]

Copyright of Ambiência is the property of Revista Ambiencia and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Total acidity and vitamin C were determined by using ultraviolet spectroscopy and multi-product multivariate calibration alternately to the reference methods, the potentiometry and Tillman's, respectively. In the developed multi-products models, different products were included (industrialized juices based on soya of different flavors and light). The linear partial least squares (PLS) method was used in the model construction and the outlier samples were evaluated. The accuracy at the 99% level, represented by the root mean square error of calibration (RMSEC) and prediction (RMSEP), was confirmed through the confidence ellipse, whereas the residuals presented random behavior, which indicates that the data fit a linear model. Sensitivity and analytical sensitivity presented adequate results in the determination of vitamin C and acidity, considering the concentration range used 0.83-16.83 mg 100 mL-1 for vitamin C and 0.17-0.34 g 100 mL-1 for total acidity. The inverse of the analytical sensitivity shows that it is possible to distinguish samples with difference in vitamin C concentration of the order of 0.73 mg 100 mL-1, and samples with difference in total acidity of the order of 6.1 x 10-3 g 100 mL- 1.The multi-product PLS model present limits of detection and quantification for vitamin C of 2.43 and 7.36 mg 100 mL-1, respectively. For total acidity, the limits of detection and quantification achieved were 0.02 and 0.06 mg 100 mL-1, respectively. The values for residual prediction deviation (RPD) presented results within the range of values, which classify the models as satisfactory. In addition, the multi-product calibration is fast, because it does not require reagents/solvents and does not generate toxic waste, being an alternative to the conventional methods and being in agreement with the requirements of green chemistry.

Abstract Yellow passion fruit are highly perishable after harvest. Organic products may have better nutritional quality and better postharvest conservation due to the application of different cultural practices such as organic fertilization and non-use of synthetic pesticides. The objective of this study was to evaluate the effects of organic fertilization on the quality and postharvest conservation of yellow passion fruit. The orchard was installed in a completely randomized design with four replications and four plants on the same row per experimental unit. The treatments were three types of fertilization applied in the orchard: mineral (MIN) recommended for the crop; organic (ORG), equivalent to the recommended potassium fertilization for the crop and 2 × ORG with twice the ORG dose. The organic fertilizer used was partially cured cattle manure. The mineral and organic fertilizers were applied superficially. During the harvest, the fruits were classified according to mass, type A (above 175 g), B (between 125 and 175 g) and C (below 125 g). The experiment was developed in a completely randomized design, in a factorial scheme (fertilization x fruit mass classes), with six replications and 90 fruits per treatment. Fruits of plants fertilized with 2 × ORG showed the same pulp yield (PY) of those that received MIN fertilization. Fruits of class C and fruits from plants fertilized with MIN showed greater weight loss. No difference between fertilization and mass classes was found for soluble solids (SS) and titratable acidity (TA). There was also no effect of fertilization on the SS / AT ratio, pH and vitamin C content, however, class B fruits showed, on average, higher values for these pulp aspects. The dose of ORG fertilizer was not enough to keep the fruit quality in relation to the PY, but the fruits from plants fertilized with ORG and 2 × ORG kept up with better commercial quality for a longer period. The organic fertilizer with cattle manure is an efficient alternative to maintaining postharvest conservation of yellow passion fruit.

Abstract The aim of this study was to evaluate the influence of organic and conventional cultivation systems and the cultivars on the postharvest quality, antioxidant activity and acceptability of strawberries. Strawberries of the cultivars Albion, Monterey and San Andreas were analysed with respect to the soluble solids content (SS), titratable acidity (TA), SS/TA ratio, fruit colour, vitamin C content, antioxidant activity by the DDPH method, mineral composition and acceptability. The cultivation systems and cultivars had different influences on the SS, TA, pH, SS/TA and colour of the strawberries. The vitamin C content of cv. Monterey was higher (78.68 mg ascorbic acid 100 g-1) than that of cv. San Andreas (70.28 mg ascorbic acid 100 g-1) in the conventional system, while in the organic system, the cultivars did not differ. Differences were not observed amongst the cultivars and cultivation conditions for antioxidant activity and the cultivation systems and cultivars had no effect on the P, Cu and Mg mineral contents. The conventionally cultivated strawberries of cv. Monterey obtained the highest value for acceptance (7.51) while the organically cultivated strawberries of cv. San Andreas received the lowest value (6.58).

Among the plants used for man as source of food and remedy, Spondias dulcis Forst F. and Spondias purpurea L. can be found. Therefore, the aim of this study was to evaluate the antioxidant capacity of the bark ethanolic extracts of S. dulcis and S. purpurea in in vitro media. The evaluation was performed by the generation of hydroxyl reactive species (HO•), hydrogen peroxide (H2O2) and nitric oxide (NO•) and assessment of the percentage of scavenger of these species by the extracts, and by the measurement of the total antioxidant capacity, by the phosphomolibdenium assay. The extracts showed high ability to scavenge HO•and NO• radicals and H2O2, and high total antioxidant capacity when compared to ascorbic acid (vitamin C). The extracts also showed high concentrations of phenolioc acids in their composition. More studies are being accomplished in order to validate the therapeutic effects of these extracts. [ABSTRACT FROM AUTHOR]

The objective of this work was to evaluate the postharvest conservation of minimally processed kits of yakissoba (carrot, cauliflower, chard and chard), cabbage and leaf mix (crisp lettuce, purple lettuce and arugula) minimally processed stored at different temperatures. The kits were supplied by the Cooperativa Coper Planalto Sul, Curitibanos, SC and the analyzes carried out at the Instituto Federal Catarinenense (IFC), Campus Rio do Sul. Packages containing the products were submitted to storage at room temperature (23±2 °C and 65±5% relative humidity (RH) and refrigerated (5±1 °C and 10±1 °C and 90±5% RH) for 5, 7 and 14 days. Fresh Weight loss (FM) and the attributes of Soluble Solids (SS), Total Titratable Acidity (AT), SS/AT ratio, pH, vitamin C content and apparent wilting and darkening were evaluated after storage. The storage at room temperature showed greatest loss of fresh matter and apparent wilting and browning in all kits evaluated. However, for the yakissoba kit the FM losses did not differ from cold storage at 10 oC for 14 days. The storage promoted the increase of vitamin C content in all the analyzed vegetables. The contents of SS and the SS/AT ratio only showed difference in the yakissoba kit, with reduction of values in all treatments when compared to the control. The refrigeration promoted the maintenance of the visual quality, keeping the conservation for two weeks. [ABSTRACT FROM AUTHOR]

The research of fruit juice and nectars provides drinks with new flavors, attractive colors and textures, and high nutritional value for the beverage industries. This study aimed to evaluate the quality of pulps and nectars, develop blends of tropical fruits, and assess their physicochemical features and presence of bioactive compounds. The preparation of nectars comprised 30% pulp and 70% mineral water, using pulps of tamarind, pineapple, acerola, and passion fruit, which served as matrices for the preparation of seven blend formulations. The following physicochemical characteristics and bioactive compounds were analyzed: soluble solids (SS), titratable acidity (TA), pH, SS/TA ratio, ascorbic acid, chlorophyll, carotenoids, anthocyanins, flavonoids, and total extractable polyphenols. All pulps, nectars, and blends had a pH below 4.5. The acerola pulp and nectar presented the highest ascorbic acid, chlorophyll, anthocyanin, and extractable polyphenol contents. The blend in Formulation 7 (30% tamarind + 20% pineapple + 25% acerola + 25% passion fruit) had the highest titratable acidity, ascorbic acid, anthocyanins, flavonoids, and carotenoids. Formulation 4 (30% tamarind + 30% pineapple + 30% acerola + 10% passion fruit) showed the highest content of total extractable polyphenols. [ABSTRACT FROM AUTHOR]

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Objective: to assess the nutritional status and food consumption of the main sources of macro and micronutrients ingested by preschool children. Method: This is an exploratory-descriptive, cross-sectional with a quantitative approach study, composed of 269 children of both sexes aged between 3 and 5 years of child municipal education centers in the city of Montes Claros, Minas Gerais. A food survey and anthropometric evaluation were carried out in the school environment, with the authorization of parents and/or guardians. Results: It appears that most of the children are eutrophic according to all the evaluated criteria. In the investigation of food, only the consumption of calories and iron was appropriate for the age range. Among the macronutrients, the consumption of carbohydrates, lipids and proteins was above the recommended value. Among the micronutrients, an increased consumption of zinc, sodium and vitamin C was observed. However, the intake of micronutrients such as calcium, magnesium, vitamins A, D and E was below the recommended levels, as well as the fibers consumption. Conclusion: It is observed that the nutritional status of children is appropriate, but there is inadequate food intake. This factor may contribute to the increase in overweight and obesity and may also be associated with nutritional deficiencies. [ABSTRACT FROM AUTHOR]

RESUMO O presente trabalho teve como objetivo avaliar a qualidade físico-química das polpas de frutas congeladas comercializadas na cidade de Cuiabá-MT, comparando com os padrões estabelecidos pela legislação vigente. O experimento foi desenvolvido em delineamento inteiramente casualizado, sendo cinco tratamentos (marcas denominadas A, B, C, D e E) e três repetições, para as polpas de abacaxi, acerola, caju, goiaba e maracujá. Foram analisados os parâmetros pH, acidez titulável expressa em ácido cítrico, sólidos solúveis, ratio, vitamina C, açúcar redutor e quantificação da perda de vitamina C após 90 dias de armazenamento sob congelamento, em polpas de acerola e caju. Os dados obtidos foram submetidos à análise de variância, e as médias, comparadas pelo teste de Tukey, ao nível de 5% de probabilidade. A marca D apresentou não conformidade com a legislação para todas as polpas em, pelo menos, um dos parâmetros avaliados. Foi observado maior número de amostras em inadequação para o teor de vitamina C e, de forma geral, as polpas avaliadas apresentaram valores abaixo das especificações exigidas pelos Padrões de Identidade e Qualidade (PIQ) para as mesmas. Todas as amostras avaliadas tiveram redução do teor de vitamina C durante armazenamento sob congelamento, sendo que nenhuma marca de polpa de acerola e apenas uma de caju apresentou, ao final de 90 dias, teor de vitamina C de acordo com o estabelecido pelo PIQ. Conclui-se que é necessária uma intensificação na fiscalização no processamento de polpas de frutas congeladas para garantia da saúde do consumidor.

The native fruits have receiving special attention, not only for their in natura use but also in the processed form. The objective of this work was to evaluated the physicochemical attributes soluble solids (SS), titratable acidity (AT), SS/AT ratio, pH and vitamin C contents in açaí (Euterpe edulis), yellow and red araçá (Psidium cattleianum), butiá (Butia capitata), guabiroba (Campomanesia xanthocarpa), jabuticaba (Plinia cauliflora) and pitanga (Eugenia uniflora) fruits at harvested. The fruits were processed and analyzes in the Laboratory of Physiology and Postharvest of the Instituto Federal Catarinense (IFC) of Rio do Sul. The levels of AT were obtained by titrations, the SS by digital refractometry, the ratio (SS/AT) was calculated by dividing the SS by AT, the pH was determined with a pHmeter in juice extracted from the fruits and the vitamin C content by the spectrophotometric method, using 2,4-denitrophenylhydrazine. Fruits of guabiroba, açaí, butiá and jabuticaba presented the highest values of AT and, together with pitanga, the highest values of SS average contents of 1.40% and 9.05%, respectively. The highest pH were observed in jabuticaba and the lowest in butiá and pitanga. The mean content of vitamin C was 56.14 mg 100g-1 of fresh matter (MF), indicating that all fruits studied are important sources of this vitamin, especially pitanga, with 76.59 mg 100g-1 of MF. The fruits present physicochemical characteristics suitable for in natura and processed form consumption. [ABSTRACT FROM AUTHOR]

ABSTRACT The goal of this study was study the postharvest quality of acerola clone BRS 236 (Malpighia emarginata D.C.) which was harvested at physiological maturity and submitted to four treatments under immersion during 5 minutes at 25 °C, which are: control (water), 60 mg L-1; 120 mg L-1 and 180 mg L-1. After treatment the fruits were packed in polystyrene trays and placed with polyethylene film and then stored at 10 ± 2 °C and 85 ± 5% RH for 12 days. Were analyzed in three days intervals (0, 3, 6, 9 and 12 days): skin color, firmness, pH, titratable acidity, soluble solids, SS/TA ratio, vitamin C and yellow flavonoids. Vitamin C, anthocyanins and yellow flavonoids were not influenced by treatments with GA3 at the end of 12-day of cold storage at 10 ºC. The exogenous application of 120 mg L-1 of GA3 resulted in retention of red color and content of anthocyanins of acerola fruits BRS 236 clone 12-day storage at 10 °C.

Camu-camu (Myrciaria dubia) is a fruit species native to the Amazon and its economic importance is proven because the fruit contains high content of ascorbic acid. The objective of this work was to evaluate the germination and vigor of seedlings obtained from seeds of different sizes of two camu-camu populations. The experimental design was completely randomized in a factorial scheme of 2 x 3 (two provenances river Anauá and river Urubu and three seed sizes, small, medium and large) with 5 replicates of 20 seeds per plot. The seeds of the origin of the Anauá river presented higher mass (1.46 g) compared to the origin of the Urubu river (0.78 g). The speed and emergence of seed germination presented better values for the population of the Anauá river, justifying the adoption of choice of origin for the formation of seedlings. For root length, dry shoot mass and dry mass of the root system, the seeds classified as medium and large originated from the Anauá river presented higher values. The size of the seeds is an important character to be used in the production of Myrciaria dubia seedlings. The seeds of the origin of the Anauá river are potentially more vigorous are indicate for the production of camu-camu (Myrciaria dubia) seedlings. [ABSTRACT FROM AUTHOR]

Copyright of Revista de Ciencias Agricolas is the property of University of Narino, Faculty of Agricultural Sciences and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

The objective was to provide information on the technological and nutritional aspects of the fruits of Quipá in order to seek applications for the same in human nutrition. The Quipá is a plant native to the Northeast, its fruit, unlike the fig-of- India is not valued. The fruits were harvested, packaged and taken to the Food Analysis Laboratory, CCTA / UFCG, Pombal- PB. They were then divided into four batches and subjected to extraction of the pulp. the physical, physico-chemical and chemical of the fruits of Quipá were evaluated. The fruits are small, the shell is more than half the weight of the fruit and seeds hinder the acceptability of fruit by the consumer. The pulp makes up just over 20% of the fruit weight, has an acidic pH, wit h low concentration of citric acid soluble solids and lower the fruit of fig-of-India and mandacaru common to semiarid; concentrations of vitamin C and phenolic compounds were considered significant, which did not occur with the flavonoids and anthocyanins, which were present in low concentrations. [ABSTRACT FROM AUTHOR]

Este trabalho objetivou estudar a cinética de degradação de suco integral manga Ubá por testes acelerados e estimar sua vida-de-prateleira a 25°C. Para isso, amostras do produto foram armazenadas em estufas tipo BOD a 25, 35 e 45°C, providas de iluminação (650lux) 24 horas por dia. As características físico-químicas que mais influenciaram na qualidade do produto foram as coordenadas de cor (L* e ∆E*) e a concentração de vitamina C. A alteração da cor seguiu o modelo cinético de ordem zero, sendo verificado um escurecimento dos produtos mantidos a 35°C e 45°C, enquanto que a degradação da vitamina C foi mais bem explicada pelo modelo de primeira ordem. Houve correlação significativa entre a concentração de vitamina C e os valores de L* e ∆E* (PThis research aimed to study the kinetic of whole mango juice cv. 'Ubá' degradation using accelerated assays and estimate its shelf-life at 25°C. The products were stored in BOD incubator at 25°C (control), 35°C and 45°C (accelerated conditions), provided with 24 hours a day 650lux lighting. Physico-chemical properties that most influenced the quality of the product were the color coordinates (L* and ∆E*) and the vitamin C content. It was found that zero order kinetic model was the best fit to variations in the values of L* and ∆E*, which showed browning of products stored under higher temperatures. There were significant correlations between changes in vitamin C content and changes in values of L* and ∆E*, suggesting that the degradation of this vitamin contributed to darkening of the product. Shelf-life of 190 days was estimated for whole mango juice stored at 25°C, using vitamin C content as the limiting quality.

A acerola é um fruto tropical de grande potencial agronômico e nutricional. A propagação vegetativa da aceroleira é uma vantagem para a obtenção e seleção rápida de clones superiores. Com o objetivo de avaliar clones de aceroleira quanto às características agronômicas e a capacidade antioxidante dos frutos, um experimento foi instalado em blocos ao acaso com 25 tratamentos, três repetições e três plantas por parcela, no Campo Experimental de Paraipaba, CE. Durante três anos, foram avaliados: altura da planta, diâmetro de copa, produção e como parâmetros pós-colheita dos frutos, os antioxidantes enzimáticos e não enzimáticos. Pelos resultados obtidos, conclui-se que o padrão de crescimento em altura apresentado pelos clones é resultado da seleção conduzida entre e dentre as progênies por dois ciclos. Dentre todos os materiais estudados, os 23/2(3), 79/10(9) e 26/5(4) apresentam boas produtividades e conteúdos de vitamina C e demonstram ter um potencial para a indústria de extração de vitamina C, enquanto, o material 20/4(8) possui boa produtividade e bom desenvolvimento vegetativo, portanto um bom potencial para a produção voltada para o consumo in natura.Acerola is a tropical fruit with great agronomic and nutritional potential. Vegetative propagation of acerola plant can be an advantage for a quick selection of superior clones. With the objective of evaluating acerola clones regarding their agronomic characteristics and antioxidant capacity of their fruit, an experiment was set up in a randomised-block design with 25 treatments consisting of three replicates with three plants per plot at the Experimental Station in Paraipaba-Ceará. For three years the following characteristics were evaluated: plant height, crown diameter and yield and as post-harvest parameters of the fruit, enzymatic and non-enzymatic antioxidants. The data shows the pattern of vertical growth displayed by the clones is resultant of a selection carried out with the progeny of two cycles. Among the studied clones, 23/2 (3), 79/10 (9) and 26/5 (4) presented good yield and vitamin C content and therefore, have potential for the industrial extraction of vitamin C, while 20/4 (8) has good yield and vegetative growth besides a high antioxidant enzymatic activity, thereby showing good potential for in natura market.

Lately, tropical fruit consumption has increased due to a higher knowledge of its nutritional and therapeutic value. The aim of this work was to evaluate the antioxidant potential of cashew apples from different early dwarf clones during their ripening. The clones analyzed included: CCP 76, CCP 09, BRS 189 and BRS 265 in seven ripening stages. They were analyzed for vitamin C, total carotenoid, total anthocyanin, yellow flavonoids and polyphenol content and total antioxidant capacity. Clone BRS 265 ripe cashew apple presented the highest vitamin C content (279.37 mg x 100 g-1). The ripe BRS 189 cashew apple is colored bright red, and its total anthocyanin content was the highest (21.16 mg x 100 g-1). The yellow flavonoids content was higher for ripe CCP 76 and BRS 189 cashew apples with 56.32 and 50.75 mg x 100 g-1, respectively. The highest levels of extrable polyphenols and antioxidant capacity were observed in CCP 09 in the first five ripening stages. The antioxidant activity of cashew apples (Anacardium occidentale L.) is mainly attributed to polyphenol content (r = 0.90; p < 0.01), and, therefore, they may be considered relevant sources of antioxidant compounds, which are necessary for human health. Cashew apples are consumed fresh which confers direct benefits for human health and present high potential for the development of new products with functional properties.Ultimamente, o consumo de frutas tropicais tem aumentado em razão de um maior conhecimento de seu valor nutricional e terapêutico. Neste trabalho, objetivou-se avaliar o potencial antioxidante de pedúnculos de cajus de diferentes clones de cajueiro anão precoce, durante o seu amadurecimento. Os clones analisados foram: CCP 76, CCP 09, BRS 189 e BRS 265, em sete estádios de amadurecimento. Foram analisados para a vitamina C total, antocianinas, carotenóides totais, flavonóides amarelos, teor de polifenóis e capacidade antioxidante total. O clone BRS 265 maduro obteve o maior teor de vitamina C (279,37 mg x 100 g-1). O pedúnculo maduro BRS 189, apresentou o maior conteúdo de antocianinas totais (21,16 mg x 100 g-1). O conteúdo de flavonóides amarelos foi maior para os clones CCP 76 e BRS 189 maduros, com 56,32 e 50,75 mg x 100 g-1, respectivamente. Os maiores teores de polifenóis extraíveis e atividade antioxidante total foram encontrados no clone CCP 09 nos primeiros cinco estádios de maturação. A atividade antioxidante de pedúnclos de caju (Anacardium occidentale L.) é atribuída principalmente ao teor de polifenóis (r = 0,90, p

No âmbito dos alimentos recomendados para redução do risco de desenvolver doenças e para melhoria da qualidade de vida, estão as frutas e seus derivados. Este trabalho teve como objetivo desenvolver um suco misto de manga, goiaba e acerola, com aceitação sensorial, utilizando delineamento de mistura para determinar as proporções das polpas. Em cada tratamento, essas proporções, foram definidas segundo um delineamento de mistura simplex aumentado de 10 tratamentos. Foram realizadas análises físico-químicas, tais como: pH, sólidos solúveis (oBrix), acidez titulável, relação de sólidos solúveis (SST)/acidez titulável (ATT), teor de vitamina C e análise sensorial. Com base nos resultados, verificou-se que todas as formulações, obtidas a partir de manga, goiaba e acerola, foram aceitas pelos consumidores. As polpas de goiaba e manga deveriam participar numa maior proporção da mistura, pois favoreceram a aceitação. A polpa de acerola, mesmo em menor proporção, contribuiu para o aumento do teor de vitamina C. As formulações com maior proporção de manga apresentaram maiores valores de pH. Maiores proporções de acerola contribuíram para maiores valores de acidez titulável. As formulações que continham maiores proporções de goiaba geraram maiores valores da relação SST/ATTIn the context of recommended foods to reduce the risk of developing diseases and to improve the quality of life, are the fruits and their derivatives. This study aimed to develop a mixed juice of mango, guava and acerola, with acceptability sensory, using experimental blending to determine the optimal proportions of pulps. In each treatment, these proportions have been defined determined according to a design blending simplex increased by 10 treatments. Were performed physicochemical analyses such as: pH, soluble solids (°Brix), acidity, vitamin C content and sensory analysis. Based on the results, it was found that all the formulations derived from mango, guava and acerola were accepted by consumers. The pulp of guava and mango should participate in a greater proportion of the mix, since they promote acceptance. The pulp of acerola, even in a smaller proportion, contributed to the increase in content of vitamin C.

Vitamin C, an exogenous antioxidant, is essential to human health. In this study, a method was validated to serum vitamin C quantification by HPLC-UV. Its stability with and without the use of tris [2-carboxy-ethyl] phosphine hydrochloride (TCEP), at -20 and -80 °C, in serum and supernatant were also evaluated. Analysis showed r² > 0.99, precision CV% < 15% and % bias < 15%, being linear, precise and accurate. The stability test revealed that using TCEP in serum storage at -20 and -80 °C or in supernatant at -80 °C the vitamin C levels remain stable for 30 and 12 days, respectively.

The objective of the present work was to determine the vitamin content C in different parts from the fruit; pulp, rind and pulp more rind, in four states of maturation: green, mature green, mature and over mature. The fruits were obtained from the Collection of Germoplasma of the Agrarian Experimental Station San Roque of the INIA Loreto, Peru. The technique used for the determination of vitamin content C was Liquid High Chromatography Performance (HPLC) with phase column reverse. The results indicate that the greater vitamin contents C are in the rind and the states of over mature and mature. And vitamin C contained according to maturation states adjusts to a curve of cubical regression, as much for pulp, rind and pulp more rind with 87%, 90% and 98 % of effectiveness; respectively. When moving from a state of maturity to another, the vitamin C content is increased in 515.43 mg in each 100 g of rind sample. The obtained results indicate that camu camu is a potential vitamin C source, located mainly in the rind of the fruit.

La pitahaya amarilla (Selenicereus megalanthus How) es una fruta exótica con gran potencial comercial. No obstante, sólo ha sido aprovechada comercialmente como fruta entera, sin procedimientos que le den valor agregado y mayor tiempo de vida de anaquel. En este trabajo se evaluó la aplicación de 200 mg%lt de 1-MCP (Metylciclopropene) en pitahaya amarilla mínimamente procesada (rodajas con cáscara y sin cáscara), empacada al vacío y almacenada bajo refrigeración, sobre la intensidad respiratoria y parámetros de calidad como sólidos solubles, acidez total titulable, pérdida de peso, azúcares totales, firmeza y color. La aplicación de 1-MCP aumentó la producción de CO2, lo cual se manifestó en mayores contenidos de sólidos solubles y azúcares totales, pero no incidió en la pérdida de peso, variación de la acidez total titulable, cambios de color y retención de la firmeza. En ambos tipos de procesamientos se logró reducir durante el almacenamiento la pérdida de vitamina C.Yellow pitahaya (Selenicereus megalanthus How), is an exotic fruit with great commercial potential, it has been commercialized without using methods that add value and%or prolong its shelf-life. The effect the application of 200 mg%lt 1-MCP on the respiratory rate and quality properties of vacuum sealed minimally processed yellow pitahaya slices during shelf-life under refrigeration was evaluated. Soluble solids, total titratable acidity, weight loss, total sugars, firmness and color were measured in fruit slices with and without skin. The application of 1-MCP before storage increased the respiratory rate and consequently increased soluble solids and total sugars, and did not show any detrimental on weight loss, total titratable acidity, color changes and firmness. However, the application of 1-MCP reduced loss of vitamin C in yellow pitahaya slices with and without skin during storage time.