scholarly journals Corona Discharge Power of Plasma Treatment Influence on the Physicochemical and Microbial Quality of Enoki Mushroom (Flammulina velutipes)

2022 ◽  
Author(s):  
Nguyen Phuoc Minh
Keyword(s):  
Weight Loss ◽  
Vitamin C ◽  
Plasma Treatment ◽  
Corona Discharge ◽  
Discharge Plasma ◽  
Total Soluble Solid ◽  
Plasma Power ◽  
Soluble Solid ◽  
Corona Discharge Plasma ◽  
Enoki Mushroom

Plasma treatment was widely known as an effective technology applied for contact-surface decontamination. Enoki (Flammulina velutipes) was an edible-medicinal mushroom with different phytochemicals and bioactive components beneficial for human health. Enoki mushroom had high respiration rate therefore it was highly perishable after harvesting. Moreover, it was greatly susceptible to microbial contamination but it was not feasible to be decontaminated by normal water washing. It’s urgent to extend shelf-life and control microbial criteria on this mushroom in dry manner without aqueous treatment. Corona discharge plasma was among 4 kinds of diverse cold atmospheric pressure plasma sources widely applied in food industry. This study demonstrated the influence of corona discharge plasma power values (control, 120, 150, 180, 210 W) on the physicochemical and microbial characteristics of Enoki mushroom during 10 days of storage at ambient temperature. Results showed that Enoki mushroom should be treated at 150 W of corona discharge plasma power to retain weight loss, total soluble solid, vitamin C in acceptable values while reducing total Aerobic count, Coliform, Enterobacteriaceae as much as possible. At the 10th day of storage, the weight loss, total soluble solid, vitamin C, total Aerobic count, Coliform, Enterobacteriaceae were recorded at 3.35±0.07%, 6.98±0.03 oBrix, 14.81±0.04 mg/100 g, 4.71±0.05 log CFU/g, 3.17±0.02 log CFU/g, 2.13±0.01 CFU/g, respectively. Findings of this research proved that corona discharge plasma pretreatment would be appropriate to maintain physicochemical properties and retard microbial loads on Enoki mushroom during preservation.

scholarly journals Pengaruh Bentuk Irisan Nanas Terhadap Mutu Simpan Terolah Minimal

2017 ◽  
Vol 2 (3) ◽  
pp. 266-275
Author(s):  
Lisa Maulidia ◽  
Rita Khatir ◽  
Ratna Ratna
Keyword(s):  
Weight Loss ◽  
Vitamin C ◽  
Life Span ◽  
Total Soluble Solid ◽  
Ananas Comosus ◽  
Minimally Processed ◽  
Fruit Texture ◽  
Short Life Span ◽  
Soluble Solid ◽  
Plastic Bag

Abstrak. Nanas (Ananas comosus Merr) segar mempunyai umur simpan yang relatif singkat. Penyimpanan dengan menggunakan kemasan plastik vakum pada suhu rendah selama penyimpanan merupakan salah satu cara untuk mempertahankan kualitas dan memperpanjang umur simpan buah nanas terolah minimal. Penelitian ini bertujuan untuk mengetahui pengaruh bentuk irisan buah nanas terolah minimal terhadap kualitas dan umur simpan nanas pada pengemasan  vakum menggunakan kemasan plastik polypropilen (PP). Rancangan penelitian yang digunakan adalah Rancangan Acak Lengkap (RAL) non faktorial, dengan faktor perlakuan adalah variasi bentuk irisan pada buah nanas yang terdiri dari 3 taraf yaitu irisan membujur, irisan dadu, dan irisan memanjang. Nanas dipotong setebal 2 cm dan disimpan pada suhu 10°C. Pengamatan dilakukan setiap 2 hari sekali sampai batas ditolak oleh panelis dengan nilai minimal 2 (tidak suka). Pengamatan penelitian meliputi umur simpan, susut bobot, kekerasan, vitamin C dan total padatan terlarut (TPT). Hasil penelitian menunjukkan bahwa nanas terolah minimal yang disimpan pada suhu 10ºC dalam kemasan vakum dengan bentuk irisan memanjang memiliki umur simpan 10 hari, sedangkan dengan bentuk irisan membujur dan irisan dadu memiliki umur simpan 6 dan 8 hari. Perlakuan variasi bentuk irisan tidak berpengaruh nyata terhadap susut bobot, kekerasan, TPT dan vitamin C pada buah nanas terolah minimal tersebut. Susut bobot yang terendah adalah pada perlakuan irisan dadu sebesar 0,9% dan tertinggi pada irisan membujur sebesar 5,2%. Kekerasan tertinggi pada irisan memanjang sebesar 0,7 kg/cm2  dan terendah pada irisan dadu sebesar 0,5 kg/cm2. Perlakuan nanas terolah minimal dengan irisan dadu menunjukkan nilai TPT tertinggi yaitu sebesar 13,3%Brix dan nilai vitamin C tertinggi sebesar 12,03 mg/100 g  bahan segar. The Influences of Cut Types on the Quality of Fresh Minimally Processed Pineapple Abstract. Fresh pineapple (Ananas comosus Merr) has short life span. The storage at vacuum and low temperature condition by using plastic bag is expected to maintain the quality and prolong the life span of fresh minimally processed pineapple. The study aimed to evaluate the influence of cut types of fresh minimally processed pineapple on its quality and shelf life. The study was done under complete random design non factorial with the cut types treatment consisted of 3 variations i.e. slicing, dicing, and julienne. The fruit was cut at thickness of 2 cm and stored at temperature of 10 C. The observation was conducted every 2 day until the consumers rejection by minimal score of 2 (dislike). The parameters observed were the life span, weight loss, the hardness, vitamin C and the total soluble solid. Results showed that the fresh minimally processed pineapple with julienne cut type had the longest life span i.e. 10 days, whereas he fresh minimally processed pineapple with slicing and dicing cut types had life span at 6 and 8 days, respectively. All cut types did not influence the weight loss, the hardness, vitamin C dan total soluble solid of fresh minimally processed pineapple. The lowest weight loss was indicated at dicing cut type (0.9%), while the highest weight loss was indicated at slicing cut type (5.2%). The hardest condition of fruit texture was observed at julienne cut type (0.7 kg/cm2), while the softest condition of fruit texture was observed at dicing cut type (0.5 kg/cm2). The best performance of total soluble solid and vitamin C were determined at dicing cut type.

scholarly journals AlGaN/GaN MOS-HEMTs with Corona-Discharge Plasma Treatment

Crystals ◽  
2017 ◽  
Vol 7 (5) ◽  
pp. 146 ◽  
Author(s):  
Shuo-Huang Yuan ◽  
Feng-Yeh Chang ◽  
Dong-Sing Wuu ◽  
Ray-Hua Horng
Keyword(s):  
Plasma Treatment ◽  
Corona Discharge ◽  
Discharge Plasma ◽  
Corona Discharge Plasma

scholarly journals Dilution Ratio and Pasteurization Effects on the Physico-chemical Characteristics of the Pulp of Saba senegalensis of Côte d'Ivoire

2019 ◽  
pp. 1-9
Author(s):  
Yapi Elisée Kouakoua ◽  
Aïssatou Coulibaly ◽  
Kouadio Claver Degbeu ◽  
N’Guessan Georges Amani
Keyword(s):  
Vitamin C ◽  
Cote D'ivoire ◽  
Total Soluble Solid ◽  
Chemical Characteristics ◽  
Dilution Ratio ◽  
Chemical Parameters ◽  
Physico Chemical ◽  
Soluble Solid ◽  
Saba Senegalensis ◽  
Β Carotene

Aims: The objective of this study was to evaluate the effect of dilution ratio and pasteurization on physico-chemical parameters of Saba senegalensis pulp in the context of its recovery. Study Design: The experimental set-up was of a completely randomized design. Place and Duration of Study: This study was carried out in the Department of Food Science and Technology, at the Laboratory of Food Biochemistry and Tropical Product Technology (BATPTL) of Nangui Abrogoua University, Abidjan, Côte d'Ivoire, between June and August 2019. Methodology: The pulp collected from the fruit was diluted according to the following pulp/water ratio (RPW; v/v): 1:0.5; 1:1 and 1:1.5 and pasteurized at 75°C at different times (5 min, 10 min and 15 min). The pH, titratable acidity (TA), Total soluble solid (TSS), vitamin C, β-carotene and the colour were determined on the different samples. Results: The results obtained during this study showed that all the physico-chemical parameters evaluated, except pH, are affected during dilution while during pasteurization only vitamin C and β-carotene are affected. During the respective dilutions, 50%, 62% and 66% of the vitamin C concentration decreased as well as 53%, 74% and 76% of β-carotene. It also led to a decrease in total soluble solid (TSS) of 32%, 50% and 59%. Following the pasteurization of each diluted pulp12%, 45% and 50% on average of the vitamin C are lost at the respective pasteurization time  (5 min, 10 min and 15 min respectively). For β-carotene the content decreases (50%) within the first 5 minutes and remains constant during the last 10 minutes of pasteurization. Conclusion: During Saba senegalensis fruit processing into nectar, dilution and pasteurization factors must be considered in order to ensure the physico-chemical quality of the beverage. The physico-chemical characteristics were more affected during dilution than in pasteurization.

scholarly journals Pendugaan Umur Simpan Jeruk Siam (Citrus nobilis var. microcarpa) Berdasarkan Kandungan Vitamin C Menggunakan Persamaan Arrhenius

2016 ◽  
Vol 1 (1) ◽  
pp. 1077-1086
Author(s):  
Niken Wahyuningsih ◽  
Ratna Ratna ◽  
Zulfahrizal Zulfahrizal
Keyword(s):  
Vitamin C ◽  
Arrhenius Equation ◽  
Storage Temperature ◽  
Total Soluble Solid ◽  
Organoleptic Test ◽  
Soluble Solid

Abstrak.Menganalisis mutu selama penyimpanan dapat dilakukan dengan mengendalikan kondisi penyimpanan tertentu serta menduga laju penurunan mutu yang terjadi. Penelitian ini bertujuan untuk menduga umur simpan jeruk siam berdasarkan laju penurunan vitamin C selama penyimpanan menggunakan persamaan Arrhenius. Jeruk siam segar disimpan dengan variasi suhu yaitu suhu 10⁰C, 15⁰C, dan 28⁰C. Analisis dilakukan 3 hari sekali hingga panelis menolak dengan parameter susut bobot, tingkat kekerasan, total padatan terlarut (TPT), vitamin C, dan uji organoleptik yaitu warna, aroma, tekstur, rasa, dan penerimaan keseluruhan. Hasil penelitian diperoleh persentase susut bobot pada suhu 10⁰C dan suhu 15⁰C yaitu 11,57 % pada penyimpanan hari ke- 12. Tingkat kekerasan tertinggi pada suhu penyimpanan 10 ⁰C yaitu 2,09 Kg/cm2. Suhu 15 ⁰C mengalami kenaikan total padatan terlarut paling tinggi hingga 9,70% brix. Uji organoleptik penyimpanan terbaik pada suhu 15 ⁰C dengan lama penyimpanan hingga hari ke- 12, warna, tekstur, aroma, rasa dan penerimaan keseluruhan skornya yaitu 4,28, 4,05, 3,76, 4,50 dan 4,10. Umur simpan jeruk siam pada suhu 10⁰C umur simpannya 15 hari, suhu penyimpanan 15⁰C umur simpannya 14 hari, Suhu  28⁰C umur simpannya 13 hari. Penelitian ini didapatkan model pendugaan laju penurunan mutu jeruk siam selama penyimpanan yaitu k = 30.01808 e-777.54(1/T). Abstract. Analyzing the quality during storage could be done by controlling the storage as well as suspecting the rate of decrease the quality. This research aim to presume the life of siamese orange based on the rate of vitamin C decrease during the storage by using Arrhenius equation. The fresh siamese oranges with variety of storage temperature were 10 0C, 15 0C, and 28  0C. Analysis done in 3 days until the panelist refected to the shrinkage of weight, the level of solid, total soluble solid (TSS), Vitanin C, and organoleptic test such as colour, aroma, texture, taste, acceptance in a whole. From the result it is obtained the percentage of shrinkage weigh of temperature at 10 0C and at 15 0C  was 11,57 % in the storage of day 12. The highest level of solid was on temperature at 10 0C was 2,09 kg/cm2. On the temperature 15 0C it has the total soluble solid up to 9,70b% brix. The best organoleptic test storage was on temperature 15 0C with in 12 days of storage, the highest colour, aroma, texture, taste, and acceptance in a whole score was 4,28, 4,05, 3,76, 4,50 and 4,10. The siamese orange life storage on temperature 10 0C could be storage for 15 days, on temperature 15 0C could be storage for 14 days, on temperature 28 0C could be storage for 13 days. The reseach found out that the persume of decreasing the quality of siamese orange duringstorage was k = 30.01808 e-777.54(1/T).

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