scholarly journals Loss of seed viability in onion (Allium cepa L.) in relation to degradation of lipids during storage

2020 ◽  
Vol 12 (4) ◽  
pp. 635-640
Author(s):  
Vishwanath Rohidas Yalamalle ◽  
Nilesh Nivrutt Gaikwad ◽  
Dinesh Manohar Ithape ◽  
Ashok Kumar ◽  
Kalyani Gorrepati ◽  
...  
Keyword(s):  
Allium Cepa ◽  
Oil Content ◽  
Seed Oil ◽  
Membrane Integrity ◽  
Seed Viability ◽  
Chemical Properties ◽  
Ambient Storage ◽  
Physico Chemical ◽  
Allium Cepa L ◽  
One Year

Onion seeds have one of the lowest longevity among the cultivated crops as it loses viability within a year. The unmarketable seeds have no reported food value or feed value. Onion seeds contain considerable oil content which has potential industrial utility. The present study reports the changes in the quality of seed oil extracted from seeds stored for one year (2019-2020), after which the seeds were unmarketable due to low germination. The physico-chemical properties of seed oil were studied in four onion (Allium cepa L.) varieties (Bhima Safed, Bhima Super, Bhima Dark Red and Bhima Shakti) by standard analytical test. The per cent oil content varied from 12.94% - 16.02% and storage resulted in 0.64% loss in seed oil content. The mean seed germination in freshly harvested seeds was 80.50%, which declined to 52.33% after one year of ambient storage. The electrical conductivity, which measures the membrane integrity increased by 108.60% in one-year-old seeds. The physico-chemical properties of the seed oil deteriorated with the age of the seed. In comparison to the control, the acid values and peroxide values of the seed oil increased by 51.11% and 12.90% respectively, while saponification value decreased by 36.18%. Among the varieties, Bhima Dark Red had the highest degradation in the seed storability and vigour, which also had the highest deterioration in the lipid quality. The present study reports for the first time the degradation of seed lipids during ageing in onion which might be contributing to the poor storability of onion seeds. 

scholarly journals Effects of Pre-sowing Treatments of Calcium Chloride and Phosphorus Fertilization on the Growth, Yield and Oil Content of Groundnut

1970 ◽  
Vol 43 (1) ◽  
pp. 29-36
Author(s):  
AA Jahangir ◽  
M Hossain ◽  
MAA Jahan ◽  
K Nada ◽  
MAM Sarker ◽  
...  
Keyword(s):  
Calcium Chloride ◽  
Oil Content ◽  
Chemical Properties ◽  
Growth Yield ◽  
Calcium Chloride Solution ◽  
Phosphorus Fertilization ◽  
Groundnut Oil ◽  
Pod Yield ◽  
Physico Chemical ◽  
Presowing Treatment

A field experiment was conducted to evaluate the effects of pre-sowing treatment of calcium chloride and phosphorus fertilization individually and combinely on the yield, oil content and physico-chemical properties of groundnut. This experiment consists of three pre-sowing treatments of calcium chloride solution (0%, 0.15%, 0.25%,0.50%) and four doses of phosphorus (0,30,45,60,75 kg/ha) with control. Pod yield of groundnut found 2.25 t/ha was maximum at 0.50% calcium chloride presowing treatment. The number of pods/plant (26.86) as well as, weight of 100 seeds (88.49) found significantly increased by applying 75 kg P2O5 / hectare when compared to the control. From the interaction of pre-sowing and fertilizer treatments, ie, 0.50% pre-sowing of calcium chloride (T3 ) with 75 kg P2O5 / hectare ( P4) produced significantly increased of pod yield (2.54 t / ha) and oil content (47.25%) of groundnut. Responses of pre-sowing and fertilization treatments on physico-chemical properties of groundnut oil such as refractive index, peroxide value, density remained unchanged throughout this experiment. Key words: Groundnut, Presowing, Calcium chlorid, Phosphorus, Oil content. DOI: 10.3329.bjsir.v43i1.854 Bangladesh J. Sci. Ind. Res. 43(1), 29-36, 2008

Physico-chemical properties of Nigerian pumpkin (Curcurbita pepo) seed oil

2006 ◽  
Vol 24 (1) ◽  
Author(s):  
NC Ihediohanma ◽  
CN Ubbaonu ◽  
ENT Akobundu ◽  
EOI Banigo
Keyword(s):  
Seed Oil ◽  
Chemical Properties ◽  
Physico Chemical

Physico-chemical properties of Tecoma stans Linn. seed oil: a new crop for vegetable oil

2015 ◽  
Vol 29 (13) ◽  
pp. 1249-1255 ◽  
Author(s):  
Hassen Mohamed Sbihi ◽  
Sadok Mokbli ◽  
Imededdine Arbi Nehdi ◽  
Saud Ibrahim Al-Resayes
Keyword(s):  
Vegetable Oil ◽  
Seed Oil ◽  
Chemical Properties ◽  
Physico Chemical ◽  
New Crop

scholarly journals Studies on the Physico-Chemical Properties of Siyal Kanta (Argemone mexicana linn) Seed Oil

1970 ◽  
Vol 46 (4) ◽  
pp. 561-564 ◽  
Author(s):  
Gm Ahmed ◽  
MS Rahman ◽  
MR Zaman ◽  
MA Hossain ◽  
MM Uddin ◽  
...  
Keyword(s):  
Fatty Acids ◽  
Fatty Acid ◽  
Silicic Acid ◽  
Column Chromatography ◽  
Seed Oil ◽  
Silicic Acid Column ◽  
Neutral Lipids ◽  
Chemical Properties ◽  
Silicic Acid Column Chromatography ◽  
Physico Chemical

The physico-chemical properties of the extracted oil were studied by the conventional methods. It was observed that Siyal Kanta grown under the soil and climatic condition of Bangladesh contains about 35% of pale yellow coloured oil. The total lipids were fractionated into three major lipid groups, neutral lipids, glycolipid and phospholipids by silicic acid column chromatography. Among the lipids, the neutral lipids were varied from 92.1-92.3%, glycolipid 5.5-5.8% and phospholipid 1.5-1.7% of the total oil of the lipid applied. The oil was also fractionated into mono-, di- and triglyceride by silicic acid column chromatography. The triglycerides were varied from 90.1-90.3%, diglycerides from 2.3-2.8% and monoglycerides from 1.5-1.8%. The saturated and unsaturated fatty acids present in the oil were separated and found to be 14.2-14.5% and 84.2-84.8% respectively depending on the areas in which the plant grows. The fatty acid compositions of the oil were analyzed by Gas Liquid Chromatography (GLC). The major fatty acids found in the oil were oleic acid (23%), linoleic acid (58%), palmetic acid (7%) and ricinoleic acid (10%). Key words: Siyal kanta seed oil; Glyceride; Lipid; Fatty acid. DOI: http://dx.doi.org/10.3329/bjsir.v46i4.9607 BJSIR 2011; 46(4): 561-564

scholarly journals ONE-POT-TWO-STEP SYNTHESIS OF BIOLUBRICANT BASE STOCK FROM RUBBER SEED OIL

2020 ◽  
Vol 45 (5) ◽  
Author(s):  
G.O . Madojemu ◽  
E.A. Elimian ◽  
M.C. Ejimadu ◽  
C.O. Okieimen ◽  
F.E. Okieimen
Keyword(s):  
Hydrogen Peroxide ◽  
Acetic Acid ◽  
Response Surface ◽  
Seed Oil ◽  
Chemical Properties ◽  
Base Stock ◽  
One Pot ◽  
Rubber Seed Oil ◽  
Rubber Seed ◽  
Physico Chemical

Biolubricant base stock was synthesized in this work from rubber seed oil in a one-pot-two-step process of epoxidation and hydroxylation. Rubber seed oil was extracted using a Soxhlet apparatus. The in situ epoxidation of the rubber seed oil with peracid (hydrogen peroxide and acetic acid) was analysed and optimized considering three process variables with their range of values given as temperature of 35-50 , time of 60-180 mins and mole ratio of hydrogen peroxide to acetic acid of 1:0.25-1:1 by applying the central composite design of response surface methodology. The ring opening reaction (hydroxylation) of the epoxide to polyhydroxylated oil (lubricant basestock) with ethanol was carried out using the optimum conditions obtained from the epoxidation process. The rubber seed oil, epoxide and lubricant basestock were characterized in terms of physico-chemical properties using standard methods and in terms of functional groups using Fourier Transform Infrared (FTIR) spectroscopy. Maximum epoxide content of 4.85% and maximum conversion of 71% of rubber seed oil to epoxide was achieved at a temperature of 50􀀀 , reaction time of 180 mins and 1: 0.39 mol/mol of hydrogen peroxide to acetic acid. The predicted values of the epoxidation process reasonably agreed with the experimental ones and model R-squared value of about 95% showed that response surface method can reasonably predict the epoxidation process using a quadratic polynomial model. There was 75% conversion of the epoxide to polyhydroxylated oil (biolubricant basestock), which represents a very high yield. The formation of epoxides and polyhydroxylated oil lead to modification (improvement) in the properties of rubber seed oil as confirmed by the physico-chemical properties and FTIR spectra analysis of the oil, epoxide and lubricant basestock. The study showed that chemical derivatives of rubber seed oils are an attractive, renewable, and ecofriendly alternative to mineral oils for lubricant formulations.

scholarly journals Evaluation of Physico-Chemical Composition in Bulbs of Red, Yellow, and White Onion (Allium Cepa L.) Genotypes of Sub-Tropical India

2020 ◽  
Vol 49 (4) ◽  
pp. 483-490
Author(s):  
I. Kaur ◽  
N. Chawla ◽  
A.S. Dhatt ◽  
M. Kaur
Keyword(s):  
Allium Cepa ◽  
Dry Matter ◽  
Quality Parameters ◽  
Tropical Region ◽  
Fresh Weight ◽  
Correlation Studies ◽  
Physico Chemical ◽  
Allium Cepa L ◽  
Chemical Attributes ◽  
Better Than

In this study, thirty onion (Allium cepa L.) genotypes grown in sub-tropical region of India were analysed for different physico-chemical attributes. There were significant differences among genotypes, and the onion genotypes showed a tendency to be classified according to different colours. The cultivars of the same colour exhibited similar tendencies in terms of accumulating most of the analysed components. About 1.78 fold variation in dry matter (%) and 2 fold variation in fresh weight per bulb were recorded among coloured onions. Red genotype D-888-B possessed maximum contents of TS and NRS, while the yellow coloured genotype POH-5 accumulated highest RS and lowest NRS contents. Maximum values of fructans (3.68 g/100 g DW), AIS (6 g/100 g DW), protein (10.61 g/100 g DW), and FAA (4.24 g/100 g DW) were also found in red coloured genotypes D-715-B, D-97-B, PR-305, and D-PS-121-B, respectively. Proline content in different genotypes was found to vary about 6.9 fold. The correlation studies showed a positive relationship between most of the quality parameters. Our results suggested that red group genotypes were better than yellow and white groups for all the studied parameters except for RS, which makes red genotypes more suitable for processing purposes.

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