COLOR QUALITY OF FROZEN STRAWBERRIES: EFFECT OF ANTHOCYANIN, pH, TOTAL ACIDITY AND ASCORBIC ACID VARIABILITY

1970 ◽  
Vol 35 (4) ◽  
pp. 448-452 ◽  
Author(s):  
R. E. WROLSTAD ◽  
TERYL P. PUTNAM ◽  
G. W. VARSEVELD
Keyword(s):  
Ascorbic Acid ◽  
Total Acidity ◽  
Color Quality

scholarly journals FRUIT ORIENTATION ALTERS THE QUALITY OF LITCHI (LITCHI CHINENSIS SONN.) UNDER THE AGRO-CLIMATIC CONDITIONS OF EASTERN INDIA

2021 ◽  
pp. 17-19
Author(s):  
NARAYAN LAL ◽  
VISHAL NATH
Keyword(s):  
Ascorbic Acid ◽  
Ascorbic Acid Content ◽  
Climatic Conditions ◽  
Lower Half ◽  
Total Acidity ◽  
Eastern India ◽  
Total Sugars ◽  
Chemical Attributes ◽  
Physical And Chemical

Objective: The experiment was conducted on ten litchi cultivars, namely; Purbi, Bedana, Lal Bombay, Mandaraji, Calcuttia, Late Bedana, Trikolia, Dehradoon, Dehrarose, and Seedless No. 2 to assess the physical and chemical composition of fruit as affected by fruit orientation on the tree. Methods: Fruits were picked both from the lower and upper half portion of the tree at fully ripened stage and physio-chemical attributes were analyzed. Results: The result indicated that fruits at lower half portion were not only heavy in weight but also had more percentage of total acidity. However, stone weight, ascorbic acid content, and total sugars were found to be more in fruits collected from the upper half portion of the tree. Conclusion: It can be suggested that picking should be started from those fruits which are positioned at the lower half portion of the tree to collect fruits of superior quality.

scholarly journals STUDY ABOUT THE INFLUENCE OF SOME FACTORS ABOUT THE LACTIC ACID FERMENTATION OF CARROT JUICES

2008 ◽  
Vol 65 (2) ◽  
Author(s):  
Magda Gabriela Bratu ◽  
Lavinia Buruleanu ◽  
Daniela Avram
Keyword(s):  
Amino Acids ◽  
Ascorbic Acid ◽  
Lactic Acid ◽  
Raw Materials ◽  
Lactic Acid Fermentation ◽  
Total Acidity ◽  
Acid Fermentation ◽  
Heat Treated ◽  
Initial Content

The influence of the storage time of vegetables - raw materials, the influence of fermentation temperature and the influence of the glucose addition about the lactic acid fermentation unfolding has been studied. Fresh carrots and carrots stored five months were pressed to raw juice and heat-treated at 70 degrees C for 20 minutes in the aim of destroy the undesirable microorganisms. Carrot juices were inoculated with lactic acid bacteria isolated from epiphytic microbiota at the concentration of 4x105 UFC/ml and fermented in a thermostat for 96 hours. During the fermentation the following analytical parameters were established: reducing sugars, total acidity, pH, amino acids content, nitrites content, ascorbic acid content. During fermentation the pH of carrot juices decreases from 6,15 to 3,99, while the total acidity increases from 0,06 to 1,62% (as lactic acid). Less than 25% of the initial content of ascorbic acid rests in the juices after 96 hours of fermentation. The amino acids content of juices, expressed as g N2/100g, increase with a middle of 50% in 96 hours, due of the proteins decomposition. The pre-digestion of these compounds improve the nutritional quality of the lactofermented juices. We found that the glucose supplement hasn’t a significant influence about the lactic acid accumulation. Also, at the end of the period of study, we found that the substratum metabolization was difficult in the sample with 1% glucose initial added. The quality of the raw materials, especially concerning the sugars content and the total acidity at the beginning of the fermentation process is important because a rapidly increase of acidity minimizes the influence of spoilage bacteria. To proceed from the results of the sensory analysis and the results of the chemical analysis we recommend stopping the fermentation of these juices after 72 hours.

scholarly journals Effects of Forchlorofenuron (CPPU) treatment on fruit properties in the fruit of common guava

2019 ◽  
Vol 72 (2) ◽  
pp. 7
Author(s):  
Zeiynab Sabaghnia ◽  
Fariborz Zaree Nahandi
Keyword(s):  
Ascorbic Acid ◽  
Vitamin C ◽  
Principal Components ◽  
Fruit Size ◽  
Soluble Solids ◽  
Total Acidity ◽  
Fruit Firmness ◽  
Total Soluble Solids ◽  
Guava Fruit

<p>The common guava is a small tree from Myrtacaeae family which is cultivated for its fruits. Researches have explored new methods to promote fruit yields and quality of crops. Application of Forchlorofenuron or CPPU (with Molecular Formula: C12H10CIN3O) improves the fruit size as well as its quality, but there has not been an investigation evaluating its effects on common guava fruit under field conditions. This research was performed to study the effects of different doses of CPPU (0, 10, 20 and 40 mg L-1) on common guava fruit size and quality characteristics under field conditions. Analysis of variance and LSD (least significant differences) mean compression indicated that total soluble solids, total acidity, ascorbic acid or vitamin C, fruit firmness, phenolics, 1,1-Diphenyl-2-picrylhydrazyl (DPPH), polygalacturonase, pectin methyl esterase and ethylene were significantly different in most traits and CPPU-40 produced high means. The principal components (PC) analysis explained 95% of the total variation and the first two principal components (PC1 and PC2) explained 78% and 17% of the total variation, respectively. According to biplot, CPPU-40 had the highest values for all of the measured traits except DPPH, ethylene and polygalacturonase. The most prominent relations by biplot were a strong positive correlation among phenolics, fruit firmness, total acidity, total soluble solids and ascorbic acid as indicated by the small obtuse angles between their vectors. The measured traits were grouped into two clusters and cutoff point verified via Wilks’ lambda statistics. Cluster I consisted of three traits (ascorbic acid or vitamin C, fruit firmness and ethylene) while cluster II included total soluble solids. Findings of this study suggest that CPPU can be used as an effective growth regulator to improve the size and quality of common guava fruit.</p>

scholarly journals ВПЛИВ ЕСФОНУ НА БІОХІМІЧНІ ЗМІНИ В ПЕРІОД ДОЗРІВАННЯ ЯГІД, УРОЖАЙНІСТЬ ТА ЯКІСТЬ ПЛОДІВ АҐРУСУ

2019 ◽  
Vol 77 (3) ◽  
pp. 65-70
Author(s):  
Н. S. Shataliuk ◽  
V. G. Kuriata
Keyword(s):  
Ascorbic Acid ◽  
Crop Production ◽  
Starch Content ◽  
Sugar Content ◽  
Control Sample ◽  
Statistical Processing ◽  
Ascorbic Acid Content ◽  
Experimental Sample ◽  
Total Acidity

The effect of pre-harvest treatment of gooseberry bushes (GROSSULARIA RECLINAT (L.) MILL) of cv. Mashenka with a 0.3% aqueous solution of ethylene product on the yield and quality characteristics of berries, quantitative changes in the content of structural polysaccharides during ripening were studied. The experiments were carried out in the field from 2015 to 2017. The experimental sites were randomly chosen, there were five bushes in a row, the repetition of the field experiment was fivefold. The plants were treated with 0.3% aqueous esphone two weeks prior to berry harvesting using an OP-2 backpack. The berries under analysis were selected every four days after treatment with the preparation. The polysaccharide content was determined on a fixed material. The berries were fixed in the field with liquid nitrogen, dried in a drying oven at 70º C to air - dry state. The determination of cellulose and pectin content was carried out by weight method, hemicellulose and non-structural carbohydrates (sugars and starch) in gooseberry fruits were carried out by iodometric method. To evaluate the quality of the berries, their analysis for total acidity was performed by potentiometric titration, ascorbic acid was determined using potassium hexacyanoferrate. The analytical replicability of the studies is fivefold. Statistical processing of the results was performed using the computer program ‘Statistica-6’. The significance of the difference between the control and experiment indicators was determined by Student's t-test. It is found out that on the fourth, eighth and twelfth days, the content of reducing sugars, sucrose and their amounts in the berries treated with ethyleneproducer plants was higher than in the control sample. A more intense decrease in the total acidity of the berries of the experimental sample was observed, while the ascorbic acid content did not change significantly. A higher amylase activity in berries due to ethylene products during ripening was also established, resulting in a faster decrease in the starch content in the berries and an increase in the sugar content. Pre-harvesting of gooseberry with ethylene product esphone leads to increased accumulation of pectic substances in the products, a more intensive hydrolysis of structural polysaccharides in comparison with the control sample, which serves as an indicator of more intense maceration of fetal tissues. The use of pre-harvest processing of gooseberry with ethylene product esphone has led to increased yields and higher quality of gooseberry crop production and has many prospects for the development of mechanized harvesting technologies.

scholarly journals Assessment of the standard of identity and quality of conventional (not pasteurized) and pasteurized cashew pulps commercialized in the State of Ceará, Brazil

2020 ◽  
Vol 9 (9) ◽  
pp. e223996855
Author(s):  
Otaniel Lima de Oliveira ◽  
Ana Paula Ferreira de Almeida ◽  
Fátima Rafaela da Silva Costa ◽  
Luana Guabiraba Mendes ◽  
Antonio Belfort Dantas Cavalcante
Keyword(s):  
Ascorbic Acid ◽  
Citric Acid ◽  
Quality Standard ◽  
Soluble Solids ◽  
Total Acidity ◽  
Small Oscillations ◽  
Solids Content ◽  
Mold And Yeast ◽  
Microbiological Aspects

The present study aimed to evaluate the quality of conventional (unpasteurized) and pasteurized frozen cashew pulps according to their identity and quality standard (physicochemical and microbiological aspects). Thus, four cashew pulp brands were analyzed, two conventional (non-pasteurized) 1 and 2, and two pasteurized 3 and 4. The following parameters with respect to physical-chemical analyzes were determined: soluble solids content, total solids, pH, total acidity expressed in citric acid and ascorbic acid. The mycorbiological analyzes performed were coliforms at 35 °C and 45 °C, molds, yeasts and Salmonella. The results showed that all brands had levels of soluble solids, pH, total acidity expressed in citric acid and ascorbic acid according to the current legislation, with small oscillations between the brands. Microbiological analyzes revealed mold and yeast contamination above that allowed by current legislation. Thus, it is concluded that pasteurization cannot always be considered an effective method in the destruction of microorganisms in food, suggesting an improvement in equipment hygiene.

scholarly journals Silicon attenuates calcium deficiency by increasing ascorbic acid content, growth and quality of cabbage leaves

2021 ◽  
Vol 11 (1) ◽  
Author(s):  
Dalila Lopes da Silva ◽  
Renato de Mello Prado ◽  
Luis Felipe Lata Tenesaca ◽  
José Lucas Farias da Silva ◽  
Ben-Hur Mattiuz
Keyword(s):  
Ascorbic Acid ◽  
Nutrient Solution ◽  
Acid Content ◽  
Dry Matter ◽  
Ascorbic Acid Content ◽  
Calcium Deficiency ◽  
Ca Deficiency ◽  
Leaf Water Loss ◽  
Nutrient Solutions

AbstractCalcium (Ca) deficiency in cabbage plants induces oxidative damage, hampering growth and decreasing quality, however, it is hypothesized that silicon (Si) added to the nutrient solution may alleviate crop losses. Therefore, this study aims at evaluating whether silicon supplied in the nutrient solution reduces, in fact, the calcium deficiency effects on cabbage plants. In a greenhouse, cabbage plants were grown using nutrient solutions with Ca sufficiency and Ca deficiency (5 mM) without and with added silicon (2.5 mM), arranged as a 2 × 2 factorial in randomized blocks, with five replications. At 91 days after transplanting, the plants were harvested for biological evaluations. In the treatment without added Si, Ca deficiency promoted oxidative stress, low antioxidant content, decreased dry matter, and lower quality leaf. On the other hand, added Si attenuated Ca deficiency in cabbage by decreasing cell extravasation while increasing both ascorbic acid content and fresh and dry matter, providing firmer leaves due to diminished leaf water loss after harvesting. We highlighted the agronomic importance of Si added to the nutrient solution, especially in crops at risk of Ca deficiency.

scholarly journals Characterizing Color Quality, Damage to Artwork, and Light Intensity of Multi-Primary LEDs for Museums

Heritage ◽  
2021 ◽  
Vol 4 (1) ◽  
pp. 188-197
Author(s):  
Dorukalp Durmus
Keyword(s):  
Energy Efficiency ◽  
Appearance Model ◽  
Light Sources ◽  
Great Flexibility ◽  
Oil Paintings ◽  
Damage Reduction ◽  
Output Variability ◽  
Color Quality ◽  
Trade Offs

Light causes damage when it is absorbed by sensitive artwork, such as oil paintings. However, light is needed to initiate vision and display artwork. The dilemma between visibility and damage, coupled with the inverse relationship between color quality and energy efficiency, poses a challenge for curators, conservators, and lighting designers in identifying optimal light sources. Multi-primary LEDs can provide great flexibility in terms of color quality, damage reduction, and energy efficiency for artwork illumination. However, there are no established metrics that quantify the output variability or highlight the trade-offs between different metrics. Here, various metrics related to museum lighting (damage, the color quality of paintings, illuminance, luminous efficacy of radiation) are analyzed using a voxelated 3-D volume. The continuous data in each dimension of the 3-D volume are converted to discrete data by identifying a significant minimum value (unit voxel). Resulting discretized 3-D volumes display the trade-offs between selected measures. It is possible to quantify the volume of the graph by summing unique voxels, which enables comparison of the performance of different light sources. The proposed representation model can be used for individual pigments or paintings with numerous pigments. The proposed method can be the foundation of a damage appearance model (DAM).

scholarly journals Effects of Process Parameters on the Color Quality of Anthocyanin-Based Colorants from Conventional and Microwave-Assisted Aqueous Extraction of Sweet Potato (Ipomoea batatas L.) Leaf Varieties

Proceedings ◽  
2020 ◽  
Vol 70 (1) ◽  
pp. 103
Author(s):  
Jin Mark D. G. Pagulayan ◽  
Aprille Suzette V. Mendoza ◽  
Fredelyn S. Gascon ◽  
Jan Carlo C. Aningat ◽  
Abigail S. Rustia ◽  
...  
Keyword(s):  
Sweet Potato ◽  
Process Parameters ◽  
Ipomoea Batatas ◽  
Extraction Methods ◽  
Aqueous Extraction ◽  
Potato Leaf ◽  
Microwave Assisted ◽  
Color Quality ◽  
The Impact

The study aimed to evaluate the effects of process parameters (time and raw material weight (RMW)) of conventional (boiling for 10–45 min) and microwave-assisted (2–8 min) aqueous extraction on the color quality (i.e., lightness (L*), chroma (C*), and hue (H°) of anthocyanin –based colorants of red and Inubi sweet potato (Ipomoea batatas L.) leaves. Using response surface methodology, it was found that RMW and boiling time (BT) and microwave time (MT) generally had a significant (p < 0.05) effect on the color quality of the extract from both extraction methods. The effects were found to vary depending on the extraction method and variety of the leaves used. Both extraction methods produced a brown to brick-red extract from the Inubi variety that turned red-violet to pink when acidified. The red sweet potato leaves produced a deep violet colored extract that also turned red-violet when acidified. It is recommended that the anthocyanin content of the extracts be measured to validate the impact of the methods on the active agent. Nevertheless, the outcomes in this study may serve as baseline data for further studies on the potential of sweet potato leaf colorants (SPLC) as a colorant with functional properties.

Clinical Efficacy of 25% l-Ascorbic Acid (C'ensil) in the Treatment of Melasma

2009 ◽  
Vol 13 (2) ◽  
pp. 74-81 ◽  
Author(s):  
Seon-Wook Hwang ◽  
Doo-Jin Oh ◽  
Deborah Lee ◽  
Jung-Wook Kim ◽  
Sung-Wook Park
Keyword(s):  
Quality Of Life ◽  
Ascorbic Acid ◽  
Skin Pigmentation ◽  
Severity Index ◽  
Transepidermal Water Loss ◽  
Open Label ◽  
Effective Treatment Modality ◽  
Quality Of Life Scale ◽  
Life Scale

Background: l-Ascorbic acid is used to treat melasma; however, it is quickly oxidized in aqueous solutions. Thus, C'ensil, a formulation containing 25% l-ascorbic acid and a chemical penetration enhancer, was created to promote the penetration of l-ascorbic acid into the skin. Objective: To evaluate the efficacy of C'ensil in patients with melasma. Methods: Forty subjects with melasma were treated with C'ensil during an open-label trial over a period of 16 weeks. Each subject's skin pigmentation was assessed every 4 weeks using the Melasma Area and Severity Index (MASI) and mexameter score. In addition, transepidermal water loss, skin dryness and irritation, and quality of life (Melasma Quality of Life Scale [MelasQoL]) were evaluated. Results: After 16 weeks, a significant decrease was noted in the degree of pigmentation based on the patients' MASI and mexameter scores. MelasQoL scores also decreased, indicating an increase in the subjects' quality of life. Conclusion: Our data indicate that C'ensil is an effective treatment modality for melasma.

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