Comparison of pyrogallol derivative performance using methyl linoleate from sunflower oil and corn oil as biodiesel antioxidant additives

The objective of this study was to determine whether lipid peroxidation is one mode of action in ochratoxin A (OA) toxicity in vivo. Lipid peroxidation was monitored by analyzing malondialdehyde (MDA) in different tissues by HPLC. A refinement study on the MDA assay was carried out, which showed the importance of the addition of an iron catalyst for the decomposition of hydroperoxides to yield a maximum amount of MDA from a given sample. The rat experiment was designed in a 2 × 2 factorial arrangement using 4 × 6 animals. The four different diets were fed for 21 d and contained either 1% corn oil and 9% tallow (Diets I and III) or 10% corn oil (Diets II and IV); in groups III and IV, 5 mg OA were added per kilogram of diet. For the chick experiment 4 × 8 Leghorn cockerels received diets for 14 d with no added sunflower oil (Diets I and III), whereas the diets of groups II and IV were supplemented with 2.5% sunflower oil. In groups III and IV, 2.5 mg OA were added per kilogram of diet. In both experiments OA decreased the performance of the animals significantly. In the rat experiment an increased lipid peroxidation due to a higher dietary level of unsaturated fatty acids could be obtained, when muscle samples were oxidatively stressed with Fe3+ and ascorbic acid. In the chick experiment there were very clear effects of the dietary treatment on the MDA concentrations of different tissues, as both a higher supply with unsaturated fatty acids and OA increased most of the MDA values significantly. These data suggest that lipid peroxides are formed in vivo by OA, but the effects may vary considerably from species to species, and may also be influenced by other factors. Key words: Ochratoxin A, lipid peroxidation, malondialdehyde, rat, chick

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COMPARISON OF EFFICIENCY OF NATURAL AND SYNTHETIC IMPREGNATING COMPOSITIONS FOR BIRCH WOOD

Actual directions of scientific researches of the XXI century theory and practice ◽

10.34220/2308-8877-2020-8-1-193-198 ◽

2020 ◽

Vol 8 (1) ◽

pp. 193-198

Author(s):

Larisa Belchinskaya ◽

A. Dmitrenkov ◽

Konstantin Zhuzhukin

Keyword(s):

Water Absorption ◽

Vegetable Oils ◽

Wood Species ◽

Sunflower Oil ◽

Corn Oil ◽

Engine Oil ◽

Birch Wood ◽

Hydrophobic Properties ◽

Natural Wood ◽

Oil Sunflower

The article is devoted to the study of technologies for the use of used motor and vegetable oils for hydrophobizing treatment of birch wood. In this work, synthetic and semi-synthetic engine oil is used to impregnate wood; spent corn oil, sunflower oil, organosilicon liquid GKZh-11, industrial impregnating composition of ZhTK. The effectiveness of the impregnating compositions is estimated by the indicators of water absorption and swelling in two mutually perpendicular directions (radial, tangential). Spent motor and vegetable oils saturate wood quite well and give it hydrophobic properties. At the same time, impregnation of birch wood with used engine oil (OMM) allows to improve water absorption of birch wood by 52.1% compared to natural wood and by 21% compared to water absorption. Thus, the processing of birch wood with used motor and vegetable oils makes it possible to utilize production waste and improve the properties of low-value wood species with a significant increase in its resistance to external influences.

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Production of biosurfactants using Egyptian soil fungi

10.21203/rs.3.rs-1136005/v1 ◽

2021 ◽

Author(s):

Shimaa R. Hamed ◽

Raed S. Al-Wasify ◽

Samar Ragab

Keyword(s):

Sunflower Oil ◽

Soil Fungi ◽

Corn Oil ◽

Enhancement Effect ◽

Waste Frying Oil ◽

Fungal Isolates ◽

Local Soil ◽

Wide Range ◽

The Stability ◽

Promising Source

Abstract Soil fungi have unique physiological and metabolic features, and are considered as an important source of biomolecules. The present research aims to study the ability of local soil fungal isolates for the production of biosurfactants and to study the stability of these biosurfactants under different temperatures (50, 70, 90, 110, and 121 ºC), different pH values (2, 3, 6, 10, 12, and 15), and different salinity concentrations (5, 10, 15, 20, and 25% NaCl) depending on the formation of clear zone using oil displacement area (ODA) test. The research also aims to study the enhancement effect of four vegetable oils including sunflower oil, waste frying oil, olive oil, and corn oil on the activity of the produced biosurfactants. The obtained results showed that Aspergillus flavus, Aspergillus wentii and Fusarium sp. had the maximum biosurfactants production. The stability of biosurfactants occurred at alkaline pH, wide range of temperatures, and under high salinity (15%). Sunflower oil had the maximum enhancement effect on the activity of the produced biosurfactants, while corn oil showed lower enhancement effect. Depending on the obtained results, it can be concluded that local soil fungal isolates are considered as a promising source for production of biosurfactants.

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Polyhydroalkanoates (PHAs) Production from Saponified Sunflower Oil in Mixed Cultures under Aerobic Condition

Jurnal Teknologi ◽

10.11113/jt.v48.230 ◽

2012 ◽

Cited By ~ 4

Author(s):

Mohd. Fadil Md. Din ◽

Zaini Ujang ◽

M. C. M Van Loosdrecht ◽

Mohd. Azlan Ahmad

Keyword(s):

Fatty Acid ◽

Sunflower Oil ◽

Corn Oil ◽

Aerobic Condition ◽

Operating Conditions ◽

Mixed Cultures ◽

Storage Rate ◽

Pha Production ◽

Sequential Phase

Satu kajian makmal telah dijalankan bagi menentukan keadaan yang optimum bagi penghasilan polihidroksialkanoat (PHA) menggunakan minyak bunga matahari (MB) tersaponifikasi. Sistem ini telah dijalankan semasa keadaan fasa terjujuk berterusan bagi pertumbuhan dan pengumpulan. Tujuan saponifikasi ke atas MB adalah untuk meningkatkan kualiti konstituen PHA (e.g. kopolimer bagi unit hidroksil) seperti hidroksibutirat (HBs), hidroksivalerat (HVs) dan hidroksiheksanoat (HHs). Kandungan utama MB adalah asid lemak rantai panjang (ALRP) di dalam kumpulan asid lemak tak tepu (C14:1 - C18:3) dan penghasil PHA yang terpilih akan dihasilkan semasa pertumbuhan tak seimbang (keadaan feast-famine). Operasi suap-kelompok selama hampir 6 bulan di bawah keadaan aerobik dinamik (dengan pelbagai keadaan operasi) dapat meningkatkan penghasilan PHA sehingga 33% jisim sel kering. Ia juga menunjukkan bahawa lumpur yang melalui keadaan aerobik di dalam kultur campuran mampu mengumpulkan jumlah PHA yang tinggi melalui manipulasi panjang kitaran (kajian masa penahanan hidrolik). Kadar penyimpanan spesifik PHA yang tinggi (qpfeast = 0.5 C-mol/C-mol. h) serta kandungan lumpur PHA tinggi dicapai dengan menggunakan kultur campuran menjadikan MB tersaponifikasi ini kompetitif berbanding dengan yang dihasilkan dengan menggunakan minyak sayuran yang lain (minyak jagung, kacang soya dan lain-lain). Kata kunci: Minyak bunga matahari tersaponifikasikan (MB), polihidroksialkanoat (PHA), rejim feast–famine, kultur campuran A laboratory study was conducted to assess the optimal conditions for polyhyroxyalkanoates (PHA) production using saponified sunflower oil (SO). The system was operated under continuous sequential phase of growth and accumulation conditions. The main purposed of using saponified SO was to improve the quality of PHA constituents (e.g. copolymer of hydroxyl-unit) such as hydroxybutyrates (HHBs), hydroxyvalerates (HHVs) and hydroxyhexanoates (HHs). Typically, SO mainly contains long-chain-fatty-acid (LCFA) with unsaturated fatty acid (C14:1 - C18:3) and therefore, the selected PHA-producer would be developed during unbalanced growth (feast-famine condition). Operation of the fed-batch for almost 6 months under aerobic dynamic conditions (with various operating conditions) has increased the PHA production up to 33% of dried cell weight. It was also shown that sludge subjected to aerobic condition in mixed cultures could accumulate high amount of PHA by manipulating the cycle length (HRT study). The high specific PHA storage rate (qpfeast = 0.5 C-mol/C-mol. h) as well as the high sludge PHA contents achieved by mixed cultures make this saponified SO competitive with those based on the other vegetable oil (e.g. corn oil, soy oil, etc.) Key words: Saponified sunflower oil (SO), polyhydroxyalkanoates (PHAs), feast–famine regimes, mixed cultures

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