VITAMIN C CONTENT AND JUICE QUALITY OF EXPOSED AND SHADED CITRUS FRUITS

2006 ◽  
Vol 13 (6) ◽  
pp. 456-460 ◽  
Author(s):  
J. R. WINSTON ◽  
ESTON V. MILLER
Keyword(s):  
Vitamin C ◽  
Juice Quality ◽  
Citrus Fruits

scholarly journals CVPDr DNA FRAGMENT AFFECT DIFFERENCES IN RESISTANT TO CITRUS VEIN PHLOEM DEGENERATION (CVPD) DISEASE, NUTRIENT DEFICIENCIES AND QUALITY OF FRUITS

2017 ◽  
Vol 5 (1) ◽  
pp. 60
Author(s):  
I Gusti Ayu Diah Yuniti ◽  
I Gede Putu Wirawan ◽  
I Nyoman Wijaya ◽  
Made Sritamin
Keyword(s):  
Vitamin C ◽  
Water Content ◽  
Major Obstacle ◽  
Nutrient Deficiencies ◽  
Citrus Fruits ◽  
Sour Taste ◽  
Citrus Plant ◽  
Dna Fragment ◽  
The Difference

Citrus Vein Phloem Degeneration (CVPD) disease is a major obstacle in the effort to develop and increase the production of citrus fruits in Bali. The study on the polymorphism of CVPDr DNA fragment shows that the CVPDr DNA fragment is resistant factor againt CVPD disease. This study try to elaborate the difference in resistance led to differences in plant nutrients deficiencies in the citrus plant with CVPD disease. . Besides, there are also difference in the quality of fruit due to CVPD disease attacks such as water content, vitamin C content and antioxidants in citrus fruits, color, flavor, taste and texture and fruit into small, hard and sour taste.

Pemanfaatan Stearin Kelapa Sawit sebagai Edible Coating Buah Jeruk

2016 ◽  
Vol 10 (1) ◽  
pp. 64-69
Author(s):  
Fauziati Fauziati ◽  
Yuni Adiningsih ◽  
Ageng Priatni
Keyword(s):  
Vitamin C ◽  
Citrus Fruit ◽  
Edible Coating ◽  
Edible Coatings ◽  
Test Results ◽  
Citrus Fruits ◽  
Fixed Amount ◽  
Food Items ◽  
Quality Of Food

Edible coatings represent preservation techniques also function as a packaging material that is applied directly to food items including fruits. Its use is intended to extend the shelf life and improve the quality of food products and is biodegradable materials that are more environmentally friendly. Research Stearin use as edible coating on citrus fruits have been done. The use of stearin used was 0%, 0.1% and 0.2% combined with gelatin at a fixed amount that is 2 g. Edible coatings applied to citrus fruit which gained the best results are stearin 0.1% with test results shrinkage lowest weight on day 12 amounted to 5.598% for the treatment of immersion and can retain the vitamin C content of 40.3 mg / 100 g and can maintain antioksioksidan to 12 days with the antioxidant content of 74.7%.ABSTRAKEdible coating merupakan teknik pengawetan sekaligus berfungsi sebagai bahan pengemasan yang diaplikasikan secara langsung pada bahan pangan termasuk buah buahan. Penggunaannya dimaksudkan untuk memperpanjang masa simpan dan memperbaiki kualitas produk pangan serta merupakan bahan yang biodegradable sehingga lebih ramah lingkungan. Penelitian penggunaan Stearin kelapa sawit sebagai edible coating pada buah jeruk telah dilakukan. Penggunaan stearin yang digunakan adalah 0%, 0.1% dan 0.2% yang dikombinasikan dengan gelatin dengan jumlah tetap yaitu 2 g. Edible coating diaplikasikan ke buah jeruk dimana diperoleh hasil terbaik yaitu stearin 0.1% dengan hasil uji susut bobot terendah pada hari ke 12 sebesar 5.598% untuk perlakuan celup dan dapat mempertahankan kandungan vitamin C sebesar 40.3 mg/100 gr serta dapat mempertahankan antioksioksidan sampai 12 hari dengan kandungan antioksidan 74.7%. Kata kunci : Stearin, Edible Coating, buah jeruk 

scholarly journals Efektifitas Emulsi Lilin Lebah Sebagai Bahan Pelapis Buah Jeruk Siam (Citrus nobilis Lour var. microcarpa) terhadap Mutu Selama Penyimpanan

2019 ◽  
Vol 7 (2) ◽  
pp. 263
Author(s):  
Made Nanda Saputra ◽  
I Made Supartha Utama ◽  
Ni Luh Yulianti
Keyword(s):  
Vitamin C ◽  
Room Temperature ◽  
Color Difference ◽  
Citrus Fruits ◽  
Total Acid ◽  
Randomized Design ◽  
Peel Color ◽  
Soluble Solid ◽  
Completely Randomized Design

Tujuan dari penelitian ini adalah untuk mengetahui efektifitas ragam konsentrasi emulsi lilin lebah sebagai bahan pelapis buah jeruk siam terhadap mutu selama penyimpanan. Penelitian ini menggunakan rancangan acak lengkap (RAL) dengan tiga ragam perlakuan konsentrasi lilin lebah 0% (K0), 2% (K2), dan 4% (K4). Buah tanpa perlakuan disediakan sebagai kontrol (K). Analisis sidik ragam menunjukkan bahwa perlakuan konsentrasi lilin lebah berpengaruh nyata (P>0.05) terhadap susut bobot, intensitas kerusakan, total padatan terlarut, kekerasan buah, color difference, vitamin C, dan uji organoleptik. Perlakuan konsentrasi lilin lebah 4% merupakan perlakuan terbaik untuk memperlambat perubahan mutu pada buah jeruk siam selama penyimpanan pada suhu kamar.   The purposes of this research was to determine the effects of various concentrations of beeswax emulsion as a coating material on the quality of Siam citrus fruits during storage. The research used completely randomized design (CRD) with three different concentration of beeswax emulsion in water consisted of 0%, 2%, and 4%. Fruit without treatment provided as a control. The analysis of variance showed that the emulsion concentrations of significantly (P<0.05) affected the weight loss, damage intensity, total soluble solid, texture, color difference, vitamin C, total acid and organoleptic prefrences (peel color, texture, flavor, and overall acceptance) of the fruits. The concentration of 4% was the best beeswax emulsion to delay quality deterioration of citrus fruits during storage at the room temperature.

Effects of Oil Spray and of Variation in Certain Spray Ingredients on Juice Quality of Citrus Fruits in California Orchards, 1950–19531

1957 ◽  
Vol 50 (2) ◽  
pp. 197-204 ◽  
Author(s):  
L. A. Riehl ◽  
R. T. Wedding ◽  
J. L Rodriguez ◽  
J. P. LaDue
Keyword(s):  
Juice Quality ◽  
Citrus Fruits

scholarly journals Penentuan Kualitas Buah Jeruk (Citrus Sinensis L) Menggunakan Teknologi Laser Photo-Acoustics (LPAS) Dengan Metode Support Vector Machine (SVM)

2019 ◽  
Vol 4 (2) ◽  
pp. 377-386
Author(s):  
Dian Sri Bintang Hasiholan Manihuruk ◽  
Darwin Darwin ◽  
Agus Arip Munawar
Keyword(s):  
Support Vector Machine ◽  
Vitamin C ◽  
Citrus Sinensis ◽  
Sugar Content ◽  
Model Performance ◽  
Support Vector ◽  
Citrus Fruits ◽  
Laser Technology ◽  
Sugar Levels

Abstrak.  Penelitian ini bertujuan untuk mengetahui kandungan vitamin C dan kadar gula pada buah jeruk dengan menggunakan teknologi Laser Photo Acoustics. Penelitian ini menggunakan sampel buah jeruk manis sebanyak 20 buah dengan empat indeks yaitu indeks pertama tidak matang (TM), setengah matang (SM), matang (M) dan matang sekali (MS).  Hasil penelitian menunjukan bahwa panjang gelombang yang diperoleh dalam menduga kadar vitamin C dan kadar gula dikisaran 4418 cm-1 - 4595 cm-1. Selanjutnya prediksi kadar gula terbaik mendapatkan (R2) sebesar 0.769, (r) sebesar 0.877, RMSEC 0.803 sedangkan RPD 2.09 yang tergolong Good Model Performance. Sedangkan untuk vitamin C mendaptkan koefisien determinasi (R2) 0.6182, koefisien kolerasi (r) sebesar 0.7862 dengan RMSEC 0.0231 sedangkan rasio RPD sebesar 1.61 yang merupakan prediksi yang masih kasar. Berdasarkan hasil penelitian yang dilakukan untuk aplikasi teknologi laser photo acoustics dapat disimpulkan bahwa teknologi laser dapat mendeteksi kandungan vitamin C dan Kadar gula pada jeruk.Determination of the Quality of Oranges (Citrus sinensis L.) Using Laser Photo Acoustics (LPAS) Technology with the Support Vector Machine (SVM)Abstract. This research aims to determine the content of vitamin C and sugar levels in citrus fruits using Laser Photo Acoustics technology. This study used a sample of 20 sweet oranges with four indices, the first index was not mature (TM), half cooked (SM), mature (M) and very mature (MS).The results showed that the wavelength obtained in estimating vitamin C levels and sugar levels in the range 4418 cm-1 - 4595 cm-1. Furthermore, the best sugar content prediction gets (R2) of 0.769, (r) of 0.877, RMSEC 0.803 while RPD 2.09 is classified as Good Model Performance. Whereas for vitamin C the determination coefficient (R2) 0.6182, the correlation coefficient (r) is 0.7862 with RMSEC 0.0231 while the RPD ratio is 1.61 which is a rough prediction. Based on the results of the research carried out for the application of photo acoustics laser technology it can be concluded that laser technology can detect the content of vitamin C and sugar content in oranges.

scholarly journals Phytochemical changes in mango fruit in response to Alternaria alternata infection

2018 ◽  
Vol 36 (No. 3) ◽  
pp. 227-232 ◽  
Author(s):  
Jiao Li ◽  
Liangang Mao ◽  
Yanning Zhang ◽  
Lan Zhang ◽  
Hongyun Jiang
Keyword(s):  
Superoxide Dismutase ◽  
Vitamin C ◽  
Fruit Quality ◽  
Alternaria Alternata ◽  
Enzyme Activities ◽  
Phenylalanine Ammonia Lyase ◽  
Titratable Acidity ◽  
Mango Fruit ◽  
Malondialdehyde Content

Changes in mango fruit quality, malondialdehyde content, and enzymatic activities in response to pathogen Alternaria alternata infection were studied. A. alternata significantly affected the appearance of mango fruit at 5 and 7 days after treatment (DAT). The quality of pathogen-infected fruit first showed a significant decrease in titratable acidity and vitamin C content and a significant increase in pH since 3 DAT. The malondialdehyde content was higher than that in the untreated controls at 3 and 7 DAT. The enzyme activities of ascorbate peroxidase and polyphenol oxidase showed significant increases since 3 DAT. Significant increases in l-phenylalanine ammonia-lyase and superoxide dismutase activities were observed at 7 DAT. These results indicate that A. alternata infection first significantly affects some biochemical constituents and enzyme activities in mango fruit since 3 DAT and that there was no significant effect on appearance until 5 DAT.

scholarly journals Impact of High-Pressure Homogenization Parameters on Physicochemical Characteristics, Bioactive Compounds Content, and Antioxidant Capacity of Blackcurrant Juice

Molecules ◽  
2021 ◽  
Vol 26 (6) ◽  
pp. 1802
Author(s):  
Bartosz Kruszewski ◽  
Katarzyna Zawada ◽  
Piotr Karpiński
Keyword(s):  
High Pressure ◽  
Vitamin C ◽  
Antioxidant Capacity ◽  
Bioactive Compounds ◽  
Titratable Acidity ◽  
Physicochemical Characteristics ◽  
Food Preservation ◽  
Inlet Temperature ◽  
High Pressure Homogenization

High-pressure homogenization (HPH) is one of the food-processing methods being tested for use in food preservation as an alternative to pasteurization. The effects of the HPH process on food can vary depending on the process parameters used and product characteristics. The study aimed to investigate the effect of pressure, the number of passes, and the inlet temperature of HPH processing on the quality of cloudy blackcurrant juice as an example of food rich in bioactive compounds. For this purpose, the HPH treatment (pressure of 50, 150, and 220 MPa; one, three, and five passes; inlet temperature at 4 and 20 °C) and the pasteurization of the juice were performed. Titratable acidity, pH, turbidity, anthocyanin, vitamin C, and total phenolics content, as well as colour, and antioxidant activity were measured. Heat treatment significantly decreased the quality of the juice. For processing of the juice, the best were the combinations of the following: one pass, the inlet temperature of 4 °C, any of the used pressures (50, 150, and 220 MPa); and one pass, the inlet temperature of 20 °C, and the pressure of 150 MPa. Vitamin C and anthocyanin degradation have been reported during the HPH. The multiple passes of the juice through the machine were only beneficial in increasing the antioxidant capacity but negatively affected the colour stability.

scholarly journals Desamerization of Bitter Jam: Biochemical and Sensory Quality

2018 ◽  
Vol 2018 ◽  
pp. 1-13
Author(s):  
Samira Lagha-Benamrouche ◽  
Terkia Benaissa ◽  
Rezki Sadoudi
Keyword(s):  
Chemical Composition ◽  
Vitamin C ◽  
Sensory Analysis ◽  
Sensory Quality ◽  
Bioactive Compound ◽  
Antioxidant Potential ◽  
Antioxidant Compounds ◽  
Bitter Orange ◽  
Sensorial Quality

This work consists of studying the influence of the desamerization of the mesocarpe on the chemical composition and the sensorial quality of the jam, based on the bitter orange. The results of the various analysis show that desamerization decreases acidity, sugars, protein, and bioactive compound levels (carotenoids, polyphenols, and vitamin C), but desamerized jams still remain an important source of antioxidant compounds with antioxidant potential in the diet. Concerning the sensory analysis of the jams, the results show that the jam desamerized with water presents the same bitterness as the bitter jam and that the salt significantly reduces the bitterness of the jams.

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