scholarly journals The Stability of Viscosity of Polybutenes and Polybutene-Mineral Oil Mixtures

1973 ◽  
Vol 22 (236) ◽  
pp. 494-498
Author(s):  
Kiyoshi YOSHIDA ◽  
Kimio KURASE ◽  
Yasumitsu KURANO ◽  
Masuhiro ONOYAMA
Keyword(s):  
Mineral Oil ◽  
Oil Mixtures ◽  
The Stability

P–250 Mineral oil with high viscosity improves the stability of pH and osmolality in the human in vitro culture system

2021 ◽  
Vol 36 (Supplement_1) ◽  
Author(s):  
E Mestres ◽  
Q Matia-Algué ◽  
A Villamar ◽  
M García-Jiménez ◽  
A Casals ◽  
...  
Keyword(s):  
Embryo Culture ◽  
Culture System ◽  
Chemical Properties ◽  
High Viscosity ◽  
Mineral Oil ◽  
Culture Conditions ◽  
Physico Chemical ◽  
Temperature Loss ◽  
The Stability

Abstract Study question Do commercial mineral oil brands differ in their capacity to stabilize the human embryo culture system, and is this related to the oil’s viscosity? Summary answer While the oils’ viscosity only had minor effects on temperature maintenance, it showed a direct correlation with the stability of pH and osmolality during culture. What is known already Mineral oil is a key component of the in vitro embryo culture system, which stabilizes temperature, pH and osmolality of the media during culture. Its use has been implemented worldwide for several decades and many manufacturers currently produce and commercialize oil intended for human embryo culture. Unfortunately, oil remains as one of the less characterized products in the IVF laboratory due to a lack of standardized nomenclature, production and testing. With differing physico-chemical properties, such as viscosity, oils produced by various manufacturers could behave differently to the same culture conditions and, thus, its use may need to be adjusted accordingly. Study design, size, duration Viscosity was quantified in three high-viscosity (H-V) and three low-viscosity (L-V) oils with a viscosity-meter. The required time for media’s pH to equilibrate using each oil was studied, as well as its subsequent stability outside the incubator for 30min. In-drop temperature was assessed during 15min when taking a dish outside the incubator, and again when putting it back. Additionally, each oil’s capacity to avoid media evaporation was studied with daily osmolality measurements during 7 days. Participants/materials, setting, methods pH equilibration was measured with a continuous pHmeter (Log&Guard, Vitrolife) in 4-well dishes prepared with 600µl of medium and 500µl of oil. For the other experiments, 35mm dishes with 4ml of oil and 20µl media droplets were used. pH stability was assessed after 0, 15 and 30min outside the incubator with a blood-gas-analyzer (epoc,SiemensHelthineers). A fine-gauge thermocouple was used to measure in-drop temperature loss/recovery. Daily osmolality readings were taken with a vapor pressure osmometer (Vapro5600,Wescor). Main results and the role of chance The selected oil samples had a viscosity of 115, 111, 52, 22, 18, and 12cP. The medium’s pH took approximately 12h to completely equilibrate under H-V oils, while it took less than 4h in L-V. Similarly, the rise in pH after 30min on a heated stage outside of the incubator with room atmosphere was 0.03, 0.04, 0.06, 0.13, 0.17, and 0.26, respectively. Dishes were taken out of the incubator and placed on a heated surface. In the first five minutes, the in-drop temperature loss ranged between –0.22 and –0.13oC/min, with no significant differences observed between oil types. However, temperature plateaued at a significantly higher value in L-V oils (36.5oC), compared to H-V brands (36.25–36.1oC; p = 0.0005). By contrast, all samples followed a similar pattern when the dishes were returned to the benchtop incubator, with temperature taking around 7 minutes to completely recover. Some media evaporated in all oil groups during the 7-day culture in a dry benchtop incubator. The linear regression performed to compare the evaporation rate between groups showed a statistically significant correlation between oil viscosity and the rate of evaporation (p < 0.0001), with an osmolality rise ranging between +2.55mmol/kg/day in the most viscous oil and +6.29mmol/kg/day in the least viscous. Limitations, reasons for caution While the selected oils for this study represent a wide range of options in the market, future projects could widen this selection and include additional tests, such as optimized bioassays. Results may vary between centers, and thus each laboratory should test and optimize their culture system with their own settings. Wider implications of the findings: Different oil brands have shown differing physico-chemical properties that have a direct effect on the culture system and the stability of several culture conditions. These results may be of major importance to adapt the settings and methodologies followed in each IVF laboratory according to the type of oil being used. Trial registration number Not applicable

The stability and coalescence of hydrate in mineral oil emulsion

2020 ◽  
Vol 38 (18) ◽  
pp. 883-890
Author(s):  
Yi Wu ◽  
Zhenbo Lv ◽  
Liyan Shang ◽  
Zhe Wang ◽  
Baoyu Liu ◽  
...  
Keyword(s):  
Mineral Oil ◽  
Oil Emulsion ◽  
The Stability

scholarly journals Monitoring the stability of fortified cold-pressed sunflower oil under different storage conditions

10.5219/1348 ◽  
2020 ◽  
Vol 14 ◽  
pp. 887-892
Author(s):  
Dani Dordevic ◽  
Simona Jancikova ◽  
Alexandra Lankovova ◽  
Bohuslava Tremlova
Keyword(s):  
Product Development ◽  
Peroxide Value ◽  
Sunflower Oil ◽  
Oxidation Stability ◽  
Storage Conditions ◽  
Human Consumption ◽  
Primary Products ◽  
Oil Mixtures ◽  
The Stability ◽  
Cold Pressed

The aim of the study was to evaluate the stability of cold-pressed sunflower oil mixed with different seeds and herb. The seeds and herb were added at 1% and 5% concentrations; samples were divided into 2 groups: stored in the dark and light. The primary products of oxidation and chlorophyll content were monitored during 3 months of storage. The results showed very low oxidation stability of experimentally produced cold-pressed oil mixtures/dressings, especially during storage on the light. The samples with 5% of hemp herb addition showed the best stability since they have peroxide value under 20 mekv O2.kg-1, both in the dark and on the light. Other samples, both stored in the dark and on light, were declared as not for human consumption due to high oxidative product development. The research represents an important storability evaluation of products that can be found on the market and that can be found very attractive for consumers.

Determining the Enthalpy of Vaporization of Toluene in 5W-30 Motor Oil and Mineral Oil Mixtures

2012 ◽  
Vol 1 (2) ◽  
pp. 23-29
Author(s):  
Shawn M. Abernathy ◽  
Brian Garrett ◽  
Anwar D. Jackson ◽  
Jockquin Jones
Keyword(s):  
Mineral Oil ◽  
Enthalpy Of Vaporization ◽  
Motor Oil ◽  
Oil Mixtures

Bottlenose Dolphins, Tursiops truncatus, Can Detect Oil

1983 ◽  
Vol 40 (9) ◽  
pp. 1516-1522 ◽  
Author(s):  
J. R. Geraci ◽  
D. J. St. Aubin ◽  
R. J. Reisman
Keyword(s):  
Thin Films ◽  
Tursiops Truncatus ◽  
Bottlenose Dolphins ◽  
Mineral Oil ◽  
Crude Oils ◽  
Air Bubbles ◽  
Detection Thresholds ◽  
Leaded Gasoline ◽  
Oil Mixtures ◽  
Motor Oils

Two trained bottlenose dolphins, Tursiops truncatus, were tested for their ability to detect visually 12 different oils and 22 oil mixtures confined at the surface in small cylinders. Detection thresholds were established in tests using progressively lighter substances. The animals detected 6-mm slicks of crude, residual, and refined motor oils, and diesel slicks thicker than 17 mm. They could not detect 6-mm thicknesses of leaded gasoline or transparent mineral oil. One dolphin's ability to detect oil improved with experience. While blindfolded, one dolphin could detect 12-mm-thick samples of two crude oils, Bunker C and mineral oil, but only when the latter two were churned and contained air bubbles. We conclude that dolphins detect the thicker concentrations of oil that occur near the source of an oceanic spill, but not lightly colored or refined products that tend to disperse into thin films.

Determination of the stability of coal-oil mixtures (COM) by infrared analysis

Fuel ◽  
1982 ◽  
Vol 61 (5) ◽  
pp. 479-481 ◽  
Author(s):  
Enzo Benedetti ◽  
Rinaldo Santini ◽  
Aldo D'Alessio ◽  
Piegiorgio Vergamimi
Keyword(s):  
Infrared Analysis ◽  
Oil Mixtures ◽  
The Stability

Characteristics of Mineral Oil-based Nanofluids for Power Transformer Application

2017 ◽  
Vol 7 (3) ◽  
pp. 1530 ◽  
Author(s):  
I. H. Zakaria ◽  
M. H. Ahmad ◽  
Y. Z. Arief ◽  
N. A. Awang ◽  
N .A. Ahmad
Keyword(s):  
Electrical Properties ◽  
Breakdown Strength ◽  
Power Transformer ◽  
Atmospheric Pressure Plasma ◽  
Mineral Oil ◽  
Transformer Oil ◽  
Before And After ◽  
Cold Atmospheric Pressure Plasma ◽  
The Stability ◽  
Physical Changes

Trends in the field of nanomaterial-based transformer oil show most of the conducted works have focused only on the transformer oil-based nanofluids but limited studies on the stability of transformer oil-based nanofluids. Since mineral oil-based nanofluids still can produce the sedimentation, thus the cold-atmospheric pressure plasma method is proposed to functionally modify the Silicon Dioxide (SiO<sub>2</sub>) nanofiller in order to enhance the electrical properties of the mineral oil-based nanofluids. The AC breakdown strength oil samples before and after modification were measured. It was found that the plasma treated nanofluids have higher AC breakdown voltage compared to pure oil and untreated nanofluids. Also, Fourier Transform Infrared (FTIR) Spectroscopy has been used in this study to analyse the physical changes of oil samples. It is envisaged that the added silica nanofiller has significant effect on electrical properties of the transformer oil-based nanofluids which would enable to the development of an improved class of liquid dielectric for the application of power transformer.

Determining Electrical Properties of Different Type of Mineral Oil Mixtures

2017 ◽  
Vol 6 (3) ◽  
pp. 544 ◽  
Author(s):  
Muhammad Bin Yahya ◽  
Alan Jaynoe Caeser anak Tening
Keyword(s):  
Olive Oil ◽  
Sunflower Oil ◽  
Test Procedure ◽  
Mineral Oil ◽  
Standard Test ◽  
Transformer Oil ◽  
Mineral Oils ◽  
Oil Mixtures ◽  
Transformer Insulation ◽  
Relationship Of

<p>This paper is written to show comparison between the naphthenic mineral oil with namely olive oil and sunflower oil in the context of voltage breakdown as insulating transformer oil. Olive oil is known to have been tested as alternative oil for transformer insulation and sunflower oil is a new oil being tested in this paper. The oils are mixed within certain ratios in order to determine the withstand breakdown voltages. The relationship of the breakdown voltages are also tied with the viscosity of the mixtures, and the mixture of oils are also exposed to ageing test and of tan-delta balancing test. All test follow IEC60156 standard test procedure for liquid insulation test. The mixtures were compared to the existing mineral oils and the findings will be discussed.</p>

The Possibility of Using Grafted Waste Rubber

1991 ◽  
Vol 64 (2) ◽  
pp. 133-138 ◽  
Author(s):  
G. Adam ◽  
A. Šebenik ◽  
U. Osredkar ◽  
F. Ranogajec ◽  
Z. Veksli
Keyword(s):  
Large Scale ◽  
Ethyl Acrylate ◽  
Mineral Oil ◽  
Polymeric Chain ◽  
Rubber Compound ◽  
Real Possibility ◽  
Polar Groups ◽  
Waste Rubber ◽  
Polybutadiene Rubber ◽  
The Stability

Abstract With the addition of 20 phr of BR granulate grafted with ethyl acrylate by the redox or gamma irradiation method to polyacrylic rubber compound, the properties of the rubber worsened, but remained within the range of properties characteristic for these types of rubber. The stability of rubber against swelling in hot mineral oil was satisfactory even when 30 phr of grafted granulate was added to polyacrylic rubber. It can be concluded that polybutadiene granulate when grafted with ethyl acrylate, gains some properties characteristic for polyacrylic rubber due to the introduction of polar groups into the polymeric chain of the BR rubber. This might also be the reason why polybutadiene granulate grafted with ethyl acrylate could be in no case added to polybutadiene rubber regardless of the grafting method. No attempt was made so far to evaluate the economical aspects of grafting waste rubber and the real possibility of using grafted granulate on a large scale.

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