scholarly journals Physicochemical Characteristics of Papaya (Carica papaya L.) Preserved in Modified Atmospheres

2018 ◽  
Vol 16 (SPL) ◽  
pp. 255-259
Author(s):  
De Paula Claudia D. ◽  
Simanca Monica M. ◽  
Causil Diana P.
Keyword(s):  
Carica Papaya ◽  
Physicochemical Characteristics ◽  
Modified Atmospheres

scholarly journals Organic Management of ‘Maradol’ Papaya (Carica papaya L.) Crops: Effects on the Sensorial and Physicochemical Characteristics of Fruits

Agriculture ◽  
2019 ◽  
Vol 9 (11) ◽  
pp. 234
Author(s):  
Perla Ruiz-Coutiño ◽  
Lourdes Adriano-Anaya ◽  
Miguel Salvador-Figueroa ◽  
Didiana Gálvez-López ◽  
Raymundo Rosas-Quijano ◽  
...  
Keyword(s):  
Carica Papaya ◽  
Management Practices ◽  
Physicochemical Characteristics ◽  
Primary Objective ◽  
Additional Treatment ◽  
Soluble Solids ◽  
Organic Management ◽  
Conventional Agriculture ◽  
Medicinal Value ◽  
Organically Managed

The Maradol Papaya (Carica papaya L.) is a fleshy berry produced in the tropics; it is highly appreciated around the world for its high nutritional and medicinal value, as well as its attractive sensory properties. Evaluating the physiological, chemical, and sensory characteristics of ‘Maradol’ papaya fruits from organically managed crops was the primary objective of this study. Four treatments (T1–T4) were evaluated, all of which were fertilized using the same organic management practices. In addition, plant extracts were applied regularly to T1–T3 as pest control, and single (T2) and double (T1) rows of trap plants (roselle) were used. T4 did not receive additional treatment. Fruits under conventional agriculture outside the experimental site were included for comparative purposes (controls). The organic management of the plants did not negatively influence the physiological traits of postharvest ripening. Among the organic treatments, T1 fruits had the highest total soluble solids, vitamin C, and reducing sugars, as well as the lowest weight loss, which significantly improved the quality of the fruit, compared to conventionally produced fruits. In addition, sensory evaluation performed by trained judges, revealed that fruits from the organically managed plots (T1–T4) were the softest and juiciest, and had a higher score in fruit and papaya aroma, in contrast to the conventionally produced fruits, which turned out to be sour, more astringent, and less soft and juicy. The results show that the exclusively organic management of ‘Maradol’ papaya crops improves several post-harvest traits of the fruits, compared to those that can be purchased commercially and are conventionally grown.

scholarly journals Conservation of Papaya (Carica papaya L.) of the Sunrise Variety Through Modified Atmospheres

2018 ◽  
Vol 16 (SPL) ◽  
pp. 251-254
Author(s):  
De Paula Claudia D. ◽  
Simanca Monica M. ◽  
Causil Diana P.
Keyword(s):  
Carica Papaya ◽  
Modified Atmospheres

scholarly journals Effect of Packaging on Microbial Survival and Physicochemical Characteristics of Non-Thermally Preserved Green Spanish-Style Olives

Proceedings ◽  
2020 ◽  
Vol 70 (1) ◽  
pp. 61
Author(s):  
Aikaterini Tzamourani ◽  
George Economou-Petrovits ◽  
Stavros Panagiotidis ◽  
George-John Nychas ◽  
Efstathios Z. Panagou
Keyword(s):  
Lactic Acid ◽  
Salt Content ◽  
Modified Atmosphere Packaging ◽  
Physicochemical Characteristics ◽  
Sensory Assessment ◽  
Modified Atmospheres ◽  
Ph Values ◽  
Physicochemical Changes ◽  
The Mean ◽  
Olive Varieties

Spanish-style green olives are among the main trade preparations in the international market. The purpose of this work was to investigate the effect of the modified atmosphere packaging of Spanish-style green olives in multi-layered pouches on the microbiological and physicochemical characteristics of olives. Green pitted olives of cv. Conservolea and Halkidiki were packaged in high-barrier multi-layered pouches under modified atmospheres and stored at room temperature for 12 months. Microbiological (lactic acid bacteria (LAB), yeasts, and Enterobacteriaceae) and physicochemical changes (pH, acidity, salt content, texture and color) were monitored throughout storage together with sensory assessment. Results showed that the initial microbiota consisted of LAB (5.9–6.3 log CFU/g) and yeasts (4.8–5.3 log CFU/g). Yeasts started to decline and could not be detected after 90 days of storage. In the end, LAB dominated in populations exceeding 5.4 and 6.1 log CFU/g for cv. Halkidiki and Conservolea, respectively. No Enterobacteriaceae could be detected in both olive varieties. In addition, pH values increased gradually from 3.51 to 4.19, the mean acidity was ca. 0.2% (expressed as lactic acid) and the salt content fluctuated between 2.0–4.4%. Color parameters L* (luminance), a* (greenness/redness) and b* (yellowness/blueness) did not change during storage in both varieties. Texture analysis showed a decrease in olive hardness from 15–20 N to 8 N throughout storage. Sensory analysis revealed that cv. Halkidiki olives were crisper with increased fibrousness compared to cv. Conservolea.

scholarly journals Effect of chitosan coatings on the physicochemical characteristics of Eksotika II papaya (Carica papaya L.) fruit during cold storage

2011 ◽  
Vol 124 (2) ◽  
pp. 620-626 ◽  
Author(s):  
Asgar Ali ◽  
Mahmud Tengku Muda Muhammad ◽  
Kamaruzaman Sijam ◽  
Yasmeen Siddiqui
Keyword(s):  
Cold Storage ◽  
Carica Papaya ◽  
Physicochemical Characteristics

scholarly journals Shelf life of sun-dried meat through the use of modified atmosphere

2020 ◽  
Vol 9 (9) ◽  
pp. e976998301
Author(s):  
Maria Carla da Silva Campêlo ◽  
Jovilma Maria Soares de Medeiros ◽  
Lucas de Oliveira Soares Rebouças ◽  
Luciana Veras Aquino Figueiroa ◽  
Manuella de Oliveira Cabral Rocha ◽  
...  
Keyword(s):  
Microbiological Quality ◽  
Biceps Femoris ◽  
Physicochemical Characteristics ◽  
Quality Characteristics ◽  
Modified Atmosphere ◽  
Chemical Quality ◽  
Modified Atmospheres ◽  
Physico Chemical ◽  
Beef Steaks ◽  
Useful Life

The objective was to evaluate the effects of different modified atmospheres on the packaging of sun-dried meat and their influence on the useful life. To this end, beef steaks of the hard topside type (Bíceps femoris) were cut, salted with 2.5% NaCl and packed in the following atmospheres: atmospheric air (CE-Ar); vacuum (CE-V); 100% CO2 (CE-ATM1); 50% CO2+ 50% N2 (CE-ATM2); 70% CO2+ 30% N2 (CE-ATM3); 30% CO2 + 70% N2 (CE-ATM4). The samples were evaluated for microbiological and physico-chemical quality. Meat packed in atmospheres with different CO2and N2 ratios had a useful life of up to 12 days, without significant variations between treatments, as to microbiological quality. Regarding the physicochemical characteristics, despite increasing the lipid oxidation in the meat, the atmospheres with different mixtures of CO2 and N2 used for packaging the meats presented the best quality characteristics. Therefore, according to this study, atmospheres modified with CO2 and N2 can be recommended as better alternatives to prolong the life of sun-dried meat.

Applications of SEM/EDXA in cement clinker investigation

1990 ◽  
Vol 48 (4) ◽  
pp. 870-871
Author(s):  
Arezki Tagnit-Hamou ◽  
Shondeep L. Sarkar
Keyword(s):  
Mineralogical Composition ◽  
Physicochemical Characteristics ◽  
Cement Clinker ◽  
Accurate Information ◽  
Phase Identification ◽  
History Of ◽  
Bulk Chemical ◽  
Resolution Imaging ◽  
Proven Method ◽  
Instantaneous Chemical

All the desired properties of cement primarily depend on the physicochemical characteristics of clinker from which the cement is produced. The mineralogical composition of the clinker forms the most important parameter influencing these properties.Optical microscopy provides reasonably accurate information pertaining to the thermal history of the clinker, while XRDA still remains the proven method of phase identification, and bulk chemical composition of the clinker can be readily obtained from XRFA. Nevertheless, all these microanalytical techniques are somewhat limited in their applications, and SEM/EDXA combination fills this gap uniquely by virtue of its high resolution imaging capability and possibility of instantaneous chemical analysis of individual phases.Inhomogeneities and impurities in the raw meal, influence of kiln conditions such as sintering and cooling rate being directly related to the microstructure can be effectively determined by SEM/EDXA. In addition, several physical characteristics of cement, such as rhcology, grindability and hydraulicity also depend on the clinker microstructure.

Common modifications of selenocysteine in selenoproteins

2019 ◽  
Vol 64 (1) ◽  
pp. 45-53 ◽  
Author(s):  
Elias S.J. Arnér
Keyword(s):  
Amino Acids ◽  
Covalent Binding ◽  
Physicochemical Characteristics ◽  
Redox Active

Abstract Selenocysteine (Sec), the sulfur-to-selenium substituted variant of cysteine (Cys), is the defining entity of selenoproteins. These are naturally expressed in many diverse organisms and constitute a unique class of proteins. As a result of the physicochemical characteristics of selenium when compared with sulfur, Sec is typically more reactive than Cys while participating in similar reactions, and there are also some qualitative differences in the reactivities between the two amino acids. This minireview discusses the types of modifications of Sec in selenoproteins that have thus far been experimentally validated. These modifications include direct covalent binding through the Se atom of Sec to other chalcogen atoms (S, O and Se) as present in redox active molecular motifs, derivatization of Sec via the direct covalent binding to non-chalcogen elements (Ni, Mb, N, Au and C), and the loss of Se from Sec resulting in formation of dehydroalanine. To understand the nature of these Sec modifications is crucial for an understanding of selenoprotein reactivities in biological, physiological and pathophysiological contexts.

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