Effect of sucrose and pectin addition on physical, chemical, thermal and rheological properties of frozen/thawed pineapple pulps

2012 ◽  
Vol 24 (3) ◽  
pp. 229-239 ◽  
Author(s):  
Márcia Cavalcante Conceição ◽  
Tatiana Nunes Fernandes ◽  
Mônica Elisabeth Torres Prado ◽  
Jaime Vilela de Resende
Keyword(s):  
Rheological Properties ◽  
Physical Chemical

Study of the physical, chemical and rheological properties of oil mixtures transported through the Uzen - Atyrau - Samara pipeline

2021 ◽  
pp. 420-427
Author(s):  
Берик Картанбаевич Саяхов ◽  
Александр Геннадьевич Дидух ◽  
Гульнара Амангельдиевна Габсаттарова ◽  
Марат Давлетович Насибулин ◽  
Жасулан Канатович Наурузбеков
Keyword(s):  
Rheological Properties ◽  
Pour Point ◽  
Heating Temperature ◽  
High Viscosity ◽  
Rheological Parameters ◽  
Polarization Microscopy ◽  
Oil Pipeline ◽  
Physical Chemical ◽  
Wide Range ◽  
Oil Mixtures

На начальных участках магистрального нефтепровода Узень - Атырау - Самара формируются партии низкозастывающих бузачинских и высокозастывающих мангышлакских нефтей. По маршруту транспортировки осуществляются дополнительные подкачки нефтей с различными физико-химическими и реологическими характеристиками, что может оказывать существенное влияние на свойства перекачиваемых нефтесмесей. Цель настоящей работы - исследование физико-химических и реологических свойств бузачинской и мангышлакской нефтесмесей на маршруте поставки Узень - Атырау, а также диапазона и причин изменений характеристик бузачинской нефти (основной в компонентном составе нефтесмесей, перекачиваемых по нефтепроводу Узень - Атырау - Самара). По результатам исследований установлено, что свойства мангышлакской нефтесмеси изменяются в незначительных пределах. Для бузачинской нефтесмеси свойственна нестабильность реологических параметров, которые могут изменяться в широком диапазоне в результате путевой подкачки на различных участках нефтепровода. Колебания реологических параметров наиболее показательных проб партий бузачинской нефтесмеси рекомендуется учитывать для решения задач повышения текучести высоковязких нефтей и оптимизации технологических режимов работы трубопроводов, по которым осуществляется перекачка таких нефтей. Методами газохроматографического анализа молекулярно-массового распределения тугоплавких парафинов и поляризационной микроскопии определена температура нагрева бузачинской и мангышлакской нефтесмесей, оптимальная для ввода депрессорной присадки. At the initial sections of the Uzen - Atyrau - Samara main oil pipeline, batches of low pour point Buzachinsky and high pour point Mangyshlak oils are formed. Additional pumping of oils with different physical, chemical and rheological characteristics is carried out along the transportation route, which can have a significant effect on the properties of the pumped oil mixtures. The purpose of this study is to examine the physical, chemical and rheological properties of Buzachi and Mangyshlak oil mixtures on the Uzen - Atyrau supply route, as well as the range and causes of changes in the characteristics of Buzachinsky oil (the main oil mixture in the blend composition pumped through the Uzen - Atyrau - Samara pipeline). According to the research results, it was found that the properties of the Mangyshlak oil mixture vary within insignificant limits. The Buzachinsky oil mixture is characterized by instability of rheological parameters, which can vary in a wide range as a result of route pumping at different pipeline sections. Fluctuations of the rheological parameters of the most indicative samples of batches of the Buzachinsky oil mixture are recommended to be taken into account in order to increase the fluidity of high-viscosity oils and optimize the process modes of operation of pipelines through which such oils are pumped. Using the methods of gas chromatographic analysis of the molecular weight distribution of high-melting-point paraffins, as well as polarization microscopy, the optimal heating temperature for the introduction of a pour point depressant into the Buzachinsky and Mangyshlak oil mixtures has been determined.

IMPROVEMENT OF PHYSICAL-CHEMICAL AND RHEOLOGICAL PROPERTIES OF GHARDAÏA LOESS (SOUTHERN ALGERIA) USING BENTONITE CLAY AND LIME

2020 ◽  
Vol 68 (5) ◽  
pp. 499-512
Author(s):  
Asmaa Rahmani ◽  
Abdelkrim Hazzab ◽  
Hadj Aimer ◽  
Abdellah Ghenaim ◽  
Abdelali Terfous
Keyword(s):  
Rheological Properties ◽  
Bentonite Clay ◽  
Physical Chemical

Study of physical-chemical and rheological properties of high-paraffin oils

2021 ◽  
pp. 26-30
Author(s):  
G.R. Gurbanov ◽  
◽  
P.F. Ahmadov ◽  
Keyword(s):  
Surface Tension ◽  
Thermal Expansion ◽  
Temperature Dependence ◽  
Rheological Properties ◽  
Temperature Rise ◽  
Dynamic Viscosity ◽  
Biological Properties ◽  
Temperature Fields ◽  
Paraffin Oil ◽  
Physical Chemical

The temperature dependence of physical-chemical and biological properties of high-paraffin oil was studied in laboratory conditions. The experiments were carried out on the oil samples without agents and with addition of 800 g/t composition developed at the ratio of Difron-4201 + Difron-3705 = 1:1. The increase in the density for 3.8 %, in the ratio of surface tension for 16 %, in the ratio of kinematic and dynamic viscosity up to 88 %, as well as in the ratio of the thermal expansion for 50.11 % was observed in the samples without agents in the temperature rise to 50K. In the samples included in the composition, the surface tension, kinematic and dynamic viscosity sharply decresed in all temperature fields compared to the samples without agents, the density practically did not change, and the ratio of thermal expansion volume slightly differed in all temperature fields.

scholarly journals Application of skimmed milk freeze concentrated in production of ice cream: physical, chemical, structural and rheological properties

2021 ◽  
Author(s):  
Callebe CAMELO-SILVA ◽  
Eulália Lopes da Silva BARROS ◽  
Maria Helena Machado CANELLA ◽  
Silvani VERRUCK ◽  
Amanda Alves PRESTES ◽  
...  
Keyword(s):  
Rheological Properties ◽  
Ice Cream ◽  
Physical Chemical ◽  
Skimmed Milk

scholarly journals Characterization of Some Spelt Wheat Starches as a Renewable Biopolymeric Material

2014 ◽  
Vol 2014 ◽  
pp. 1-9 ◽  
Author(s):  
Dorota Gałkowska ◽  
Teresa Witczak ◽  
Jarosław Korus ◽  
Lesław Juszczak
Keyword(s):  
Rheological Properties ◽  
Viscoelastic Properties ◽  
Shear Thinning ◽  
Wheat Varieties ◽  
Spelt Wheat ◽  
Physical Chemical ◽  
Pasting Characteristics ◽  
Wheat Starches ◽  
Starch Gels

The aim of this work was to analyze selected physical, chemical, thermal, and rheological properties of starches isolated from different spelt wheat varieties. The analyzed starches contained from 22.5 to 24.6 g/100 g of amylose and from 45.9 to 50.6 mg/100 g of phosphorus. Ranges of characteristic gelatinization temperatures, TO, TP, and TE, were 55.7–58.5°C, 61.1–62.6°C, and 67.4–68.2°C, respectively, while gelatinization enthalpy ranged from 8.87 to 9.96 J/g. The pasting curves showed significant differences in pasting characteristics of the starches. The values of maximum viscosity (ηmax) and viscosity after cooling (η50) determined for the starch pastes were in the range of 82.3–100.7 B.U. and 149.3–172.7 B.U., respectively. The starch pastes demonstrated non-Newtonian, shear thinning flow behaviour and thixotropy phenomenon. After cooling the resulting starch gels were characterized by different viscoelastic properties, with a dominance of elastic features (G′>G′′). The starches exhibited different tendency to retrogradation, with its degree (R=ΔHR/ΔHG) in the range of 21.1–37.4%.

Effect of deacetylation degree of chitosan on rheological properties and physical chemical characteristics of genipin-crosslinked chitosan beads

2020 ◽  
Vol 106 ◽  
pp. 105876 ◽  
Author(s):  
Loleny Tavares ◽  
Elí Emanuel Esparza Flores ◽  
Rafael Costa Rodrigues ◽  
Plinho Francisco Hertz ◽  
Caciano Pelayo Zapata Noreña
Keyword(s):  
Rheological Properties ◽  
Chemical Characteristics ◽  
Chitosan Beads ◽  
Deacetylation Degree ◽  
Physical Chemical ◽  
Crosslinked Chitosan

scholarly journals Effect of Waste Engine Oil and Waste Cooking Oil on Performance Improvement of Aged Asphalt

2019 ◽  
Vol 9 (9) ◽  
pp. 1767 ◽  
Author(s):  
Haibin Li ◽  
Bo Dong ◽  
Wenjie Wang ◽  
Guijuan Zhao ◽  
Ping Guo ◽  
...  
Keyword(s):  
Rheological Properties ◽  
Waste Cooking Oil ◽  
Engine Oil ◽  
Asphalt Binders ◽  
Cooking Oil ◽  
Waste Engine Oil ◽  
Physical Chemical ◽  
Pavement Recycling ◽  
Aged Asphalt ◽  
Cyclic Utilization

In order to explore the applicability of waste engine oil and waste cooking oil used in aged asphalt, the effect of waste engine oil and waste cooking oil on aged asphalt recycling was studied through the analysis of the improvement of its physical, chemical, and rheological properties. Six aged asphalt binders with different aging times were obtained by indoor test simulation using the Thin Film Oven Test at 163 °C. Then, waste engine oil and waste cooking oil with five different dosages were added to investigate improvement performances. The results clearly demonstrated that waste engine oil and waste cooking oil could soften and recover the work ability of aged asphalt effectively. Furthermore, the physical, chemical, and rheological performances of six aged asphalts could be improved to normal level of virgin asphalt if the content of waste engine oil or waste cooking oil was suitable. The rheological properties of aged asphalt with waste cooking oil had better improvement than that with waste engine oil. Overall, the good applicability would provide waste oil a much wider service range in asphalt pavement recycling field. It also provided a method of developing new rejuvenating agent with the two waste oils to achieve complex synergism effect. Moreover, it realized the waste cyclic utilization and environmental protection.

scholarly journals Effect of pre-emulsified sesame oil on physical-chemical and rheological properties of pork batters

2017 ◽  
Vol 37 (4) ◽  
pp. 620-626 ◽  
Author(s):  
Zhuang Li KANG ◽  
Dong-yang ZHU ◽  
Bin LI ◽  
Han-Jun MA ◽  
Zhao-Jun SONG
Keyword(s):  
Rheological Properties ◽  
Sesame Oil ◽  
Physical Chemical

scholarly journals Characterization and Marmelade processing potential of quince cultivars cultivated in tropical regions

2018 ◽  
Vol 40 (2) ◽  
Author(s):  
Paula Nogueira Curi ◽  
Givago Coutinho ◽  
Mariana Matos ◽  
Rafael Pio ◽  
Francielly Corrêa Albergaria ◽  
...  
Keyword(s):  
Rheological Properties ◽  
Physicochemical Characteristics ◽  
Great Variability ◽  
Consumer Acceptance ◽  
Chemical Characteristics ◽  
Tropical Regions ◽  
Sensory Acceptance ◽  
Physical Chemical

Abstract With the purpose of adding value to the final product and aiming to identify which cultivars implanted in tropical regions are more appropriate for the processing of marmelade, the objective of this study was to characterize and evaluate the influence of different cultivars of quince (‘Fuller’, ‘Smyrna’, ‘Portugal’, ‘Provence’, ‘Mendonza Inta-37’, ‘Alaranjado’, ‘Lajeado’, ‘CTS 207’, ‘D’Angers’ and ‘Bereczy’) grown in tropical Brazilian regions, on the physical-chemical characteristics, rheological properties and the consumer acceptance of the obtained marmelade. The different quince cultivars presented great variability among themselves in relation to physical and physicochemical characteristics. However, the cultivars studied gave rise to marmelades that were similar to each other, which had a high sensory acceptance, except for the cultivar Mendonza Inta-37, which resulted in a less accepted marmelade.

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