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Fulltext EFFECTS OF DIFFERENTEXPOSURE TIMES OF LED LIGHTS ON POSTHARVEST PERFORMANCES OF FRESH-CUT PINEAPPLE(Ananas comosusL. cv. Josapine)

LEONG JIA Q, WAN ZALIHA WAN SEMBOK

UMT Journal of Undergraduate Research, 2019;1(1):68-79.
MyJurnal

Pineapple is one of the most important commercial fruit crops served in fresh-cut form which is convenientfor the consumers. However, fresh-cut pineapple induces the activity of phenolic compounds which triggers the generation of brown or dark pigments. Browning incidence (BI) directly influences the fruit’s acceptability and marketability. Therefore, different exposure times (5mins, 10mins, 15mins and 20mins)and typesof LED lights (white, red and blue) were applied on fresh-cut pineapple stored at 5oC storage for twelve days to reduce BI. A significant interaction between the two factors was recorded in lightness coefficient, chroma, total phenolic and ascorbic acid (AA)contents. Regardless of exposure times, all types of LED lights, mainly the blue light, succeeded in delaying BI in fresh-cut pineapple. In conclusion, blue light had a tendency todelay BI andmaintaintheother postharvest quality attributes of fresh-cut pineapple.

Matched MeSH terms: Ascorbic Acid
Fulltext Breakfast Consumption and Quality of Macro- and Micronutrient Intake in Indonesia: A Study from the Indonesian Food Barometer

Khusun H, Anggraini R, Februhartanty J, Mognard E, Fauzia K, Maulida NR, et al.

Nutrients, 2023 Aug 30;15(17).
PMID: 37686824 DOI: 10.3390/nu15173792

Breakfast is an important meal that has been shown to have a positive effect on health. The current study aimed to assess the patterns of breakfast consumption among adult Indonesians and to estimate the contribution of breakfast to their nutrient intake and dietary quality. The study used 24-h recall data from the 2018 Indonesian Food Barometer study to assess breakfast intake among 1333 adults aged 18 and above from six provinces in Indonesia. Diet quality was measured using the Nutrient Rich Food index (NRF) 9.3, and the nutritional profile of breakfast was compared across tertiles of NRF 9.3. In total, 5.2% of adults in Indonesia skipped breakfast. Breakfast contributed 26% to daily energy intakes and 22-28% to intakes of all reported nutrients, except for total sugar (12%), vitamin C (8%) and vitamin D (7%). With respect to daily requirements, breakfast contributed approximately 20% to energy, protein, fat and sodium requirements, 26% to saturated fat but <15% to the requirements for most micronutrients and only 5% for fiber. Among breakfast consumers, a higher NRF score was associated with higher daily intakes of protein, dietary fiber and micronutrients and lower intakes of sodium from breakfast. This study suggests that a balanced breakfast in Indonesia should aim to lower fat and saturated fat intake while increasing fiber, potassium, calcium and vitamin C and D intake. These findings could inform the development of nutrient-based guidelines for breakfast consumption in Indonesia.

Matched MeSH terms: Ascorbic Acid
Physico- and phytochemical properties of Brassica juncea as affected by agroclimatic conditions

Batool U, Nawaz R, Ahmad S, Irshad MA, Irfan A, Gaafar AZ, et al.

Sci Rep, 2024 Jan 08;14(1):797.
PMID: 38191635 DOI: 10.1038/s41598-023-48808-9

Physicochemical and phytochemical assessment of leaf mustard (Brassica juncea L.) grown in different agroclimatic conditions is essential to highlight their compositional variability and evaluate the most suitable bunch of agroclimatic and agronomic practices. B. juncea is one of the important leafy vegetables that serve as source of vitamin A and C and iron, and plenty of antioxidants. This in situ research was executed to assess the quality variability of B. juncea grown in different agroecosystems. Leaves' samples of B. juncea were procured from 15 farmers' fields exhibiting different agroclimatic conditions i.e., elevation, nutrient management, temperature, irrigation, and tillage practices. Leaves' samples were subjected to physicochemical and phytochemical analysis, i.e., moisture, pH, TSS, ascorbic acid, carotenoids, phenolics, flavonoids, and antioxidant potential. In the leaves' samples of B. juncea, the target properties were found to vary significantly (P ≤ 0.05) in different agroclimatic conditions. The moisture content, ascorbic acid, phenolic content, carotenoids, and antioxidants were found in the range of 62.7-79.3%, 74-91 mg/100 g, 49.2-49.2 mg GAE/100 g, 436.3-480 mg β carotene/100 g, 32.7-46.67%, respectively. This study elaborates the significant variation of physicochemical and phytochemical attributes of B. juncea due to the prevailing agroclimatic conditions. This necessitates the appropriate choice of B. juncea concerning its composition and ecological conditions of its cultivation in the prospective health benefits.

Matched MeSH terms: Ascorbic Acid
Heterophil to lymphocyte ratio and tonic immobility reactions to preslaughter handling in broiler chickens treated with ascorbic acid

Zulkifli I, Che Norma MT, Chong CH, Loh TC

Poult Sci, 2000 Mar;79(3):402-6.
PMID: 10735209

Stress and fear responses were evaluated in broiler chicks that were pretreated for 24 h with 0 ppm (control) or 1,200 ppm of L-ascorbic acid (AA) in their drinking water. The birds were subsequently subjected to either upright handling (UH) or inverted (IH) handling for about 45 s. Heterophil (H) counts, lymphocyte (L) counts, and H/L ratios (H/L) ratios were determined immediately (T0) and at 20 h (T20) following the handling treatment. The H/L ratios were similar for both groups at T0, whereas 20 h after the handling treatment, AA-supplemented birds had lower ratios than controls, resulting in a significant water treatment x time of blood sampling interaction. Inverted handling had negligible effect on H/L ratios but augmented tonic immobility (TI) durations as compared with UH. Irrespective of handling procedure, supplemental AA reduced underlying fearfulness, as measured by TI reaction. Neither water treatment nor handling method had significant effect on number of attempts to induce TI.

Matched MeSH terms: Ascorbic Acid/administration & dosage; Ascorbic Acid/pharmacology*
History of scurvy and use of vitamin C in critical illness: A narrative review

Dresen E, Lee ZY, Hill A, Notz Q, Patel JJ, Stoppe C

Nutr Clin Pract, 2023 Feb;38(1):46-54.
PMID: 36156315 DOI: 10.1002/ncp.10914

In 1747, an important milestone in the history of clinical research was set, as the Scottish surgeon James Lind conducted the first randomized controlled trial. Lind was interested in scurvy, a severe vitamin C deficiency which caused the death of thousands of British seamen. He found that a dietary intervention with oranges and lemons, which are rich in vitamin C by nature, was effective to recover from scurvy. Because of its antioxidative properties and involvement in many biochemical processes, the essential micronutrient vitamin C plays a key role in the human biology. Moreover, the use of vitamin C in critical illness-a condition also resulting in death of thousands in the 21st century-has gained increasing interest, as it may restore vascular responsiveness to vasoactive agents, ameliorate microcirculatory blood flow, preserve endothelial barriers, augment bacterial defense, and prevent apoptosis. Because of its redox potential and powerful antioxidant capacity, vitamin C represents an inexpensive and safe antioxidant, with the potential to modify the inflammatory cascade and improve clinical outcomes of critically ill patients. This narrative review aims to update and provide an overview on the role of vitamin C in the human biology and in critically ill patients, and to summarize current evidence on the use of vitamin C in diverse populations of critically ill patients, in specific focusing on patients with sepsis and coronavirus disease 2019.

Matched MeSH terms: Ascorbic Acid/pharmacology; Ascorbic Acid/therapeutic use
Fulltext Outcome of Er, Cr:YSGG laser and antioxidant pretreatments on bonding quality to caries-induced dentin

Moharam LM, Salem HN, Abdou A, Afifi RH

BMC Oral Health, 2025 Jan 15;25(1):66.
PMID: 39810132 DOI: 10.1186/s12903-024-05390-4

BACKGROUND: This study aimed to assess the influence of different pretreatment protocols and antioxidants application on the shear bond strength (SBS) of universal adhesive to sound (SoD) and caries-induced dentin (CID).
METHODS: One hundred and twenty posterior teeth had their occlusal enamel removed, then the specimens were divided into two main groups according to dentin substrates; SoD and CID, three subgroups according to pretreatments protocols control (no pretreatment), NaOCl-treated, and Er, Cr:YSGG-treated and two divisions according to antioxidant application (with and without sodium ascorbate (SA) application). All-Bond Universal (ABU) universal adhesives was applied in self-etch (SE) mode then resin composite discs were built. The specimens were stored in distilled water for 24-hr at 37°C before SBS testing. Three-way ANOVA and Tukey HSD tests were used for data analysis (a = 0.05).
RESULTS: 6% NaOCl resulted in a significant reduction in SBS in SoD without antioxidant application. 10% SA application showed significant increase in SBS for 6% NaOCl group only in SoD. Laser application recorded a significantly higher SBS compared to 6% NaOCl group without or with antioxidant application, while 10% SA application revealed a significant increase in SBS for control group only.
CONCLUSIONS: Er, Cr:YSGG laser irradiation followed by antioxidant application has the potential to enhance the bonding quality of both tested dentin substrates. NaOCl application has significantly compromised the bonding to SoD and CID substrates.

Matched MeSH terms: Ascorbic Acid/pharmacology; Ascorbic Acid/therapeutic use
Fulltext Crystal deposits in cornea from the use of vitamin C eye drops

Choong YY, Arumugam G

Med J Malaysia, 1999 Dec;54(4):526-7.
PMID: 11072476

There are a number of differential diagnoses for crystal deposits in the cornea. With the presence of a corneal epithelial defect, the differential diagnosis can be narrowed down to either infective causes or deposits from topical medications. This report describes a case of crystal deposits in the cornea from the use of Vitamin C eye drops.

Matched MeSH terms: Ascorbic Acid/administration & dosage; Ascorbic Acid/adverse effects*
Suitability of combination of calcium propionate and chitosan for preserving minimally processed banana quality

Mirshekari A, Madani B, Golding JB

J Sci Food Agric, 2017 Aug;97(11):3706-3711.
PMID: 28111769 DOI: 10.1002/jsfa.8231

BACKGROUND: The marketability of fresh-cut banana slices is limited by the rapid rate of fruit softening and browning. However, there is no scientific literature available about the role of postharvest calcium propionate and chitosan treatment on the quality attributes of fresh-cut banana. Therefore, the aim of the present study was to investigate these effects.
RESULTS: The application of calcium propionate plus chitosan (CaP+Chit) retained higher firmness, higher ascorbic acid content, higher total antioxidant activity and higher total phenolic compounds, along with lower browning, lower polyphenol oxidase, lower peroxidase, lower polygalacturonase and lower pectin methyl esterase activities and microbial growth, compared to control banana slices after 5 days of cold storage.
CONCLUSION: The results of the present study show that CaP+Chit could be used to slow the loss of quality at the same time as maintaining quality and inhibiting microbial loads. © 2017 Society of Chemical Industry.

Matched MeSH terms: Ascorbic Acid/analysis; Ascorbic Acid/metabolism
Intravenous ascorbic acid as a treatment for severe jellyfish stings

Kumar S, Miranda-Massari JR, Gonzalez MJ, Riordan HD

P R Health Sci J, 2004 Jun;23(2):125-6.
PMID: 15377062

We report a case of jellyfish envenomation in a 39 year old male. He was stung extensively on both lower limbs by an unidentified jellyfish. This occurred in shallow waters of a beach in the vicinity of Labuan Island, Malaysia. The patient received ambulatory treatment with parenteral and oral ascorbate with remarkable recovery.

Matched MeSH terms: Ascorbic Acid/administration & dosage; Ascorbic Acid/therapeutic use*
Fulltext The potential of pumpkin (cucurbita moschata duschene) as commercial crop in malaysia

Aimi Adzirul kamarubahrin, Asmaddy Haris, Siti Nurazira Mohd Daud, Zurina kefeli @ Zulkefli, Nursilah Ahmad, Nurul Aini Muhamed, et al.

The Pertanika Journal of Scholarly Research Reviews, 2018;4(3):1-10.
MyJurnal

Awareness of recommendations for fruit and vegetable consumption has increased substantially over the last 20 years. In addition, fruits and vegetables such as pumpkin (Cucurbita moschata Duchesne) are good sources of many important nutrients, including potassium, vitamin C, folate, fibre, and numerous phytochemicals. Malaysia produces pumpkinits own, with considerably large areas of production comparable to its high global demand. However, in reality, there is a limitation in the commercial production as the local pumpkinis very much dependent on the market demand as the utilization has been limited to the consumption of fresh product. Thus, the objective of the study first initiative to provide the information about the pumpkinand second to investigatesthe opportunities on commercialized local pumpkinin Malaysia as by products despite various nutritious it is also listed as prophetic foods. The scientific research that covered a broad range of in vitro to in vivo studies on the by-products potentials of these fruits is also discussed in detail.The current review is an update for researchers to have a better understanding of the pumpkin, which simultaneously can provide awareness to enhance their commercial value and promote their utilization.Malaysia have potential to growth pumpkin instead of continuously importing. The daily consumption of pumpkins may provide various health benefits to human. Future investigation is needed to explore the potential of pumpkin as by products in order to increase its competitiveness and self-sufficiency.

Matched MeSH terms: Ascorbic Acid
One-pot green synthesis of highly reduced graphene oxide decorated with silver nanoparticles

Nur Suhaili Abd Aziz, Muhammad Khairullah Nor Azmi, Abdul Manaf Hashim

Sains Malaysiana, 2017;46:1083-1088.

A one-pot green sonochemical process assisted by ascorbic acid as the reducing agent to produce highly reduced graphene oxide (rGO) decorated with silver nanoparticles (AgNPs) is demonstrated. A complete removal of oxygen-containing group in the GO sheets was confirmed by no observation of the peak corresponds to C-O, C=O and -OH bond. The unexpected decrease of peak intensity corresponds to sp2 hybridized C=C group is explained by a so-called bond polarity effect. The peak observed at ~400 nm seems to show the presence of AgNPs and the red shifting of C=C peak to ~270 nm after the introduction of ascorbic acid indicates the formation of highly reduced GO. The increase of AgNPs size and the crumpled silk-like morphology after the introduction of ascorbic acid also indicate the aggressive reduction of both AgNPs and GO. The increase of ID/IG ratio after the introduction of ascorbic acid seems to indicate the increase of the number of small sp2 domains, the presence of unrepaired defects and the restoration of the sp2 network. This work provides the promising green sonochemical approach by utilizing non-toxic and environmental-friendly reducing agent to produce highly reduced GO decorated with AgNPs for various applications.

Matched MeSH terms: Ascorbic Acid
Fulltext A Comprehensive Review on Chemical and Pharmacological Potential of Viola betonicifolia: A Plant with Multiple Benefits

Rizwan K, Khan SA, Ahmad I, Rasool N, Ibrahim M, Zubair M, et al.

Molecules, 2019 Aug 29;24(17).
PMID: 31470508 DOI: 10.3390/molecules24173138

Viola betonicifolia (Violaceae) is commonly recognized as "Banafsha" and widely distributed throughout the globe. This plant is of great interest because of its traditional, pharmacological uses. This review mainly emphases on morphology, nutritional composition, and several therapeutic uses, along with pharmacological properties of different parts of this multipurpose plant. Different vegetative parts of this plant (roots, leaves, petioles, and flowers) contained a good profile of essential micro- and macronutrients and are rich source of fat, protein, carbohydrates, and vitamin C. The plant is well known for its pharmacological properties, e.g., antioxidant, antihelminthic, antidepressant, anti-inflammatory, analgesic, and has been reported in the treatment of various neurological diseases. This plant is of high economic value. The plant has potential role in cosmetic industry. This review suggests that V. betonicifolia is a promising source of pharmaceutical agents. This plant is also of significance as ornamental plant, however further studies needed to explore its phytoconstituents and their pharmacological potential. Furthermore, clinical studies are needed to use this plant for benefits of human beings.

Matched MeSH terms: Ascorbic Acid
Fulltext Cytomegalovirus retinitis associated with high CD4 counts and DHEA abuse

Keat GY, Ahmad SS, Subramaniam S, Ghani SA, Samsudin A

Indian J Sex Transm Dis AIDS, 2020 06 18;41(1):119-122.
PMID: 33062999 DOI: 10.4103/ijstd.IJSTD_90_15

The most frequent ocular manifestation of acquired immunodeficiency syndrome (AIDS) is cytomegalovirus retinitis (CMVR). This infection is reportedly inversely proportional to the CD4 counts. Usually CMVR develops once the CD4 counts fall below 50/mm3. Our case report documents an AIDS patient who developed CMVR despite CD4 counts being persistently >200/mm3. The patient was self-administering dehydroepiandrosterone, high dose Vitamin C, testosterone and hydrocortisone. This case report describes a unique case of pharmacologically induced elevated CD4 counts, which however, did not prevent the development of CMVR in the patient.

Matched MeSH terms: Ascorbic Acid
Fulltext Browning metabolism and quality of fresh-cut drumstick (Moringa oleifera) as influenced by acidulant treatments

Siddiqui MW, Homa F, Nayyer MA, Ghatak A, Yousuf B, Aftab MA, et al.

J Food Sci Technol, 2020 Jun;57(6):2010-2016.
PMID: 32431327 DOI: 10.1007/s13197-019-04233-3

Though fresh-cut products save our time, but they are very much prone to enzymatic browning that drastically affects product's quality and marketability. Drumstick pods are considered as super food due to high nutritional contents. However, the fresh-cut pods are prone to brown discoloration. The enzyme activities promote the softening and cut-surface browning of pods, thus deteriorates their texture, decreases consumer appeal and shortens the shelf life. So, we aimed to assess the effect of citric (1%) and ascorbic (1%) acid treatments on quality attributes of fresh-cut drumsticks at 3-d interval during storage (5 ± 1 °C). In general there was an increase in lignin and quinone contents, while phenolic content was decreased during storage. However, samples subjected to ascorbic acid dip had higher phenolic content, lower rate of lignin formation, and reduced membrane permeability. Enzyme activities (polyphenol oxidase and peroxidase) were found to increase during storage, however, samples treated with ascorbic acid showed lower activities than that of the control and citric acid treated samples. The reduced enzyme activities resulted in the reduced browning incidence and maintained the quality. Therefore, postharvest dip of fresh-cut drumstick in to ascorbic acid (1%) could be suggested to increase the shelf life with reduced browning during low temperature storage.

Matched MeSH terms: Ascorbic Acid
Plasma vitamins A, C and E in the general population of Singapore, 1993 to 1995

Hughes K, New AL, Lee BL, Ong CN

Ann Acad Med Singap, 1998 Mar;27(2):149-53.
PMID: 9663300

The National University of Singapore Heart Study measured cardiovascular risk factors, including selected plasma vitamins, on a random sample of the general population aged 30 to 69 years. Plasma vitamins A and E were normal and similar by ethnic group. Mean plasma vitamin A levels were: Chinese (males 0.68 and females 0.52 mg/L), Malays (males 0.67 and females 0.54 mg/L), and Indians (males 0.66 and females 0.51 mg/L). Mean plasma vitamin E levels were: Chinese (males 12.6 and females 12.6 mg/L), Malays (males 13.6 and females 13.3 mg/L), and Indians (males 12.9 and females 12.8 mg/L). No person had plasma vitamin A deficiency (< 0.01 mg/L) and only 0.1% had vitamin E deficiency (< 5.0 mg/L). In contrast, plasma vitamin C was on the low side and higher in Chinese than Malays and Indians. Mean plasma vitamin C levels were: Chinese (males 6.3 and females 8.4 mg/L), Malays (males 5.1 and females 6.4 mg/L), and Indians (males 5.7 and females 6.9 mg/L). Likewise, the proportions with plasma vitamin C deficiency (< 2.0 mg/L) were lower in Chinese (males 14.4 and females 0.7%), than Malays (males 19.7 and females 7.2%), and Indians (males 17.8 and females 11.0%). Relatively low levels of plasma vitamin C may contribute to the high rates of coronary heart disease and cancer in Singapore. In particular, lower plasma vitamin C in Malays and Indians than Chinese may contribute to their higher rates of coronary heart disease. However, plasma vitamin C does not seem to be involved in the higher rates of cancer in Chinese than Malays and Indians. The findings suggest a relatively low intake of fresh fruits and a higher intake is recommended. Also, food sources of vitamin C may be destroyed by the high cooking temperatures of local cuisines, especially the Malay and Indian ones.

Matched MeSH terms: Ascorbic Acid/blood*; Ascorbic Acid Deficiency/blood
Fulltext Drying characteristics and quality evaluation of kiwi slices under hot air natural convective drying method

Siew, E.S., Chin, S.K., Soon, W.L.

International Food Research Journal, 2015;22(6):2188-2195.
MyJurnal

Dried kiwis are highly needed in food industries such as cereals, ice-cream, beverages and supplemental products. In this paper, drying characteristics and product quality of hot air dried kiwi slices were studied. Hot air drying of kiwi slices was investigated at drying temperature ranged from 40°C to 60°C and slice thickness of 0.3 cm and 0.6 cm. Results showed that drying of kiwi slices at higher drying temperature stimulates the drying rate, which leads to shorter total drying time required. The drying kinetics of kiwi slices was best fitted by approximation diffusion model. Increased in drying temperatures and slice thickness of kiwi enhanced the effective moisture diffusivity (Deff). The highest Deff of the kiwi slices was recorded as 1.5681 x 10-8 m2 /min at slice thickness of 0.6 cm. In terms of quality analysis, kiwi slices dried at temperature of 60°C with fastest drying rate retained most of the Total Phenolic Content (TPC) in the dried sample. However, drying of kiwi slices at high drying temperature deteriorated the vitamin C content of kiwi slices due to thermal degradation. Thinner kiwi slices could preserve higher amount of TPC and vitamin C during the drying process, yet the best hot air drying temperature for drying of kiwi slices could be relied on the consumers’ preference based on the dried product quality as reported in the current work.

Matched MeSH terms: Ascorbic Acid
Fulltext Comparison of antioxidant properties of pomelo [Citrus Grandis (L) Osbeck] varieties

Toh, J.J., Khoo, H.E., Azrina, A.

International Food Research Journal, 2013;20(4):1661-1668.
MyJurnal

This study aimed to compare the antioxidant content and antioxidant capacity of pulp and peel of two varieties of pomelo fruit (Tambun White and Tambun Pink). Antioxidants including total phenolic content, total flavonoid content and ascorbic acid content were determined using Folin-Ciocalteu reagent assay, aluminium chloride colorimetric assay and AOAC method, respectively. Antioxidant capacity of pomelo pulp and peel was measured using ferric reducing antioxidant potential and trolox equivalent antioxidant capacity assays. The peels of both pomelo fruits had higher antioxidant content and capacity than their pulps. Moreover, the white variety of pomelo had higher antioxidant content and capacity compared to the pink counterpart. Trolox equivalent antioxidant capacity of the samples was positively high correlated with total phenolic content (r = 0.978) and total flavonoid content (r = 0.959), except for ascorbic acid. Therefore, pomelo peel from white variety possessed higher antioxidant properties and it is potentially rich sources of natural antioxidants.

Matched MeSH terms: Ascorbic Acid
Fulltext Evaluation of antioxidant properties in fresh and pickled papaya

Nurul, S. R., Asmah, R.

International Food Research Journal, 2012;19(3):1117-1124.
MyJurnal

Preservative fruits have gained popularity in recent years as part of food consumption, but their benefits towards human health are not known. This study compared total phenolic (TPC), total flavonoid (TFC), β-carotene, lycopene, ascorbic acid (AA) contents and antioxidant properties between fresh and pickled papaya. The results indicated that mean TPC (mg gallic acid equivalent/100 g dry samples), TFC (mg rutin equivalent/100 g dry samples), β-carotene (µg/100 g edible portions), lycopene (µg/100 g edible portions) and AA content (mg/100 g edible portions) were higher in fresh papaya (141.66 ± 11.71; 57.80 ± 2.11; 793.83 ± 5.47; 779.69 ± 5.55; 70.37 ± 0.65) as compared to pickled form. Antioxidant activity (%) measured by DPPH and β-Carotene-Linoleate bleaching method was higher in fresh papaya (56.83 ± 4.68; 77.56 ± 1.40). Total phenolic, total flavonoid, ascorbic acid, beta carotene and lycopene were strongly correlated with antioxidant activity and scavenging activity (0.905 ≤ r ≤ 1.00) indicating that were important contributors to antioxidant properties in papaya extracts. The pickling process of papaya caused a significant decrease in their antioxidant component and activity

Matched MeSH terms: Ascorbic Acid
Fulltext Effect of thermal and ultraviolet treatments on the stability of antioxidant compounds in single strength pineapple juice throughout refrigerated storage

Goh, S. G., Noranizan, M., Leong, C. M., Sew C. C., Sobhi, B.

International Food Research Journal, 2012;19(3):1131-1136.
MyJurnal

Thermal treatment is commonly applied in juice manufacturing as a method to pasteurize juices. However the heat may deteriorate some of the essential compounds in the juice, especially heat-sensitive antioxidants. Therefore non-thermal treatment such as ultraviolet (UV) ray has been proposed as an alternative for pasteurization. The objective of this study was to compare the effect of thermal and UV treatments on the content of antioxidants (phenolic acids, flavonoids, carotenoids, ascorbic acids) and antioxidant capacity of single strength pineapple juice. The antioxidants stability of juices throughout 14 days of refrigerated storage was also studied. Ultraviolet treatment shows higher ascorbic acid content after treatment as compared to thermally treated single strength pineapple juice. Storage time affected the studied antioxidants, where UV
treatment provided better stability to ascorbic acid content while thermal treatment provided better stability to flavonoids and carotenoids.

Matched MeSH terms: Ascorbic Acid
Fulltext Studies on the physicochemical and sensory characteristics of goat's milk dadih incorporated with tropical-fruit purees

Chye, S.J., Ahmad, R., Noor Aziah, A.A.

International Food Research Journal, 2012;19(4):1387-1392.
MyJurnal

This study was carried out to improve the nutritional value of goat’s milk dadih by the addition of tropical-fruit purees, namely, jackfruit (Artocarpus heterophyllus, Lam.), pineapple (Ananas comosus) and papaya (Carica papaya). Dadih with added fruits were compared with the control (without fruit puree) for physical, chemical and sensory attributes. The texture properties of the tropical- fruit dadih were significantly different (p< 0.05) from the control. Control dadih showed highest values for lightness and hue (p< 0.05) as compared to tropical- fruit dadih. The addition of tropical- fruit purees significantly increased (p< 0.05) the moisture, protein, ash and vitamin C contents of the fruit added dadih. There were no significant differences (p> 0.05) in the fat, carbohydrate, energy and total soluble solid contents. Sensory evaluations using a hedonic test showed that all dadih were acceptable. Overall, syneresis of the dadih increased with decreasing pH throughout storage at 4°C.

Matched MeSH terms: Ascorbic Acid

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