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Characterization of low saturation palm oil products after continuous enzymatic interesterification and dry fractionation

Huey SM, Hock CC, Lin SW

J Food Sci, 2009 May-Jul;74(4):E177-83.
PMID: 19490322 DOI: 10.1111/j.1750-3841.2009.01122.x

The lipase-catalyzed interesterification of refined, bleached, deodorized palm olein with iodine value (IV) of 62 was studied in a pilot continuous packed-bed reactor operating at 65 degrees C. Sn-1,3 specific immobilized enzyme; Lipozyme TL IM (Thermomyces Lanuginosa) from Novozyme A/S was used in this study. The interesterification reaction produced fully solidified fats at ambient temperature due to the production of trisaturated triacylglycerols (TAG) (PPP and PPS, where P = palmitic acid, S = stearic acid). The reaction also increased the percentage of triunsaturated TAG (OLL, OLO, and OOO, where O = oleic acid, L = linoleic acid). The interesterified product was then dry fractionated at temperatures of 9, 12, 15, 18, and 21 degrees C to separate the saturated fats from the unsaturated. The results show that IV of olein increased when the fractionation temperature (T(FN)) decreased. The highest IV of olein was 72, obtained from T(FN) at 9 degrees C. After interesterification and laboratory-scale fractionation, the olein fractions contained higher unsaturation content ranging from 64.7% to 67.7% compared to the starting material (58.3%), while the saturation content was reduced from 41.7% to the range of 32.3% to 35.3%. The yields of these oleins were low with the range of 24.8% to 51.8% due to the limitation of the vacuum filtration. Ten kilograms of pilot-scale fractionation with membrane press filter was used to determine the exact olein yield. At T(FN) of 12 degrees C, 67.1% of olein with saturation content of 33.9% was obtained.

Matched MeSH terms: Triglycerides/metabolism*; Triglycerides/chemistry
Properties of high-oleic palm oils derived by fractional crystallization

Ramli MR, Siew WL, Cheah KY

J Food Sci, 2008 Apr;73(3):C140-5.
PMID: 18387090 DOI: 10.1111/j.1750-3841.2007.00657.x

High-oleic palm oil (HOPO) with an oleic acid content of 59.0% and an iodine value (IV) of 78.2 was crystallized in a 200-kg De Smet crystallizer with a predetermined cooling program and appropriate agitation. The slurry was then fractionated by means of dry fractionation at 4, 8, 10, 12, and 15 degrees C. The oil and the fractionated products were subjected to physical and chemical analyses, including fatty acid composition, triacylglycerol and diacylglycerol composition, solid fat content, cloud point, slip melting point, and cold stability test. Fractionation at 15 degrees C resulted in the highest olein yield but with minimal oleic acid content. Due to the enhanced unsaturation of the oil, fractionation at relatively lower crystallization temperature showed a considerable effect on fatty acid composition as well as triacylglycerol and diacylglycerol composition of liquid fractions compared to higher crystallization temperature. The olein and stearin fractionated at 4 degrees C had the best cold stability at 0 degrees C and sharper melting profile, respectively.

Matched MeSH terms: Triglycerides/analysis*; Triglycerides/chemistry
Composition and thermal analysis of lard stearin and lard olein

Yanty NA, Marikkar JM, Man YB, Long K

J Oleo Sci, 2011;60(7):333-8.
PMID: 21701095

Lard being an edible fat could be used in different forms in food systems. In this study, composition and thermal analysis of lard stearin (LS) and lard olein (LO) were undertaken to determine some common parameters which would enable their detection in food. A sample of native lard was partitioned into LS and LO using acetone as solvent and the fractions were compared to the original sample with respect to basic physico-chemical parameters, fatty acid and triacylglycerol (TAG) composition, and thermal characteristics. Although LS and LO displayed wider variations in basic physico-chemical parameters, thermal properties and solidification behavior, they do possess some common characteristic features with regard to composition. In spite of the proportional differences in the major fatty acids, both LS and LO are found to possess extremely high amount of palmitic (C16:0) acid at the sn-2 positions of their TAG molecules. Similar to native lard, both LS and LO contained approximately equal proportions of TAG molecules namely, linoleoyl-palmitoyl-oleoyl glycerol (LPO) and dioleoyl-palmitoyl glycerol (OPO). Hence, the calculated LPO/OPO ratio for LS and LO are comparably similar to that of native lard.

Matched MeSH terms: Triglycerides/analysis*; Triglycerides/chemistry
Effects of administration of alpha-tocopherol and tocotrienols on serum lipids and liver HMG CoA reductase activity

Khor HT, Ng TT

Int J Food Sci Nutr, 2000;51 Suppl:S3-11.
PMID: 11271854

Male hamsters were fed on semi-synthetic diets containing commercial corn oil (CO), isolated corn oil triglycerides (COTG), COTG supplemented with 30 ppm of alpha-tocopherol (COTGTL) and COTG supplemented with 81 ppm of alpha-tocopherol (COTGTH) as the dietary lipid for 45 days. Male albino guinea pigs were fed on commercial chow pellets and treated with different dosages of tocopherol and tocotrienols intra-peritoneally for 6 consecutive days. Serum and liver were taken for analysis. Our results show that stripping corn oil of its unsaponifiable components resulted in COTG which yielded lower serum total cholesterol (TC) and low-density lipoprotein cholesterol (LDL-C) and raised high-density lipoprotein cholesterol (HDL-C) and serum triglycerides (TG) levels. These results indicate that the COTG with its fatty acids are responsible for the hypocholesterolemic effect exhibited by corn oil. However, supplementing the COTG diet with alpha-tocopherol (alpha-T) at 30 ppm significantly raised the serum TC, LDL-C and TG levels, but did not alter the HDL-C level, indicating that alpha-T is hypercholesterolemic. Supplementing the COTG diet with alpha-T at 81 ppm raised the serum TC level but to a lesser extent as compared to that obtained with 30-ppm alpha-T supplementation. The increased TC, in this case, was reflected mainly by an increased in HDL-C level as the LDL-C level was unchanged. The TG level was also raised but to a lesser extent than that obtained with a lower alpha-T supplementation. The liver HMG CoA reductase (HMGCR) activity was exhibited (56%) by the COTG as compared to CO. Supplementation of alpha-T at 30 ppm to the COTG diet resulted in further inhibition (76%) of the liver HMGCR activity. On the contrary, supplementation of alpha-T at 81 ppm to COTG diet resulted in a highly stimulatory effect (131%) on the liver HMGCR activity. Short-term studies with guinea pigs treated intra-peritoneally with alpha-T showed that at low dosage (5 mg) the HMGCR activity was inhibited by 46% whereas increasing the dosage of alpha-T to 20 mg yielded lesser inhibition (18%) as compared to that of the control. Further increase in the dosage of alpha-T to 50 mg actually resulted in 90% stimulation of the liver HMGCR activity as compared to the control. These results clearly indicate that the effect of alpha-T on HMGCR activity was dose-dependent. Treatment of the guinea pigs with 10 mg of tocotrienols (T3) resulted in 48% inhibition of the liver HMGCR activity. However, treatment with a mixture of 5 mg of alpha-T with 10 mg of T3 resulted in lesser inhibition (13%) of the liver HMGCR activity as compared to that obtained with 10 mg of T3. The above results indicate that the alpha-T is hypercholesterolemic in the hamster and its effect on liver HMGCR is dose-dependent. T3 exhibited inhibitory effect on liver HMGCR and alpha-T attenuated the inhibitory effect of T3 on liver HMGCR.

Matched MeSH terms: Triglycerides/administration & dosage; Triglycerides/blood
Fulltext Chemical and Physical Characterization of the Hackberry (Celtis australis) Seed Oil: Analysis of Tocopherols, Sterols, ECN and Fatty Acid Methyl Esters

Nodeh HR, Rashidi L, Gabris MA, Gholami Z, Shahabuddin S, Sridewi N

J Oleo Sci, 2020 Nov 01;69(11):1359-1366.
PMID: 33055442 DOI: 10.5650/jos.ess20128

For the very first time, the nutritional and physicochemical properties of the oil extracted from hackberry Celtis australis fruit were investigated with the aim of possible applications of such wild fruit oil. The physicochemical properties such as peroxide value, acidity, saponification, iodine value and total fat content of the extracted oil were examined extensively. The obtained results showed that peroxide value, acidity, saponification, iodine value and total fat content of the extracted oil were found to be 4.9 meq O2/kg fat, 0.9 mg KOH/g fat, 193.6 mg KOH/g fat, 141.52 mg I2/g fat and ~5%, respectively. The predominant fatty acid found in this wild fruit is linoleic acid which was calculated to be 73.38%±1.24. In addition, gamma-tocopherol (87%) and β-sitosterol (81.2%±1.08) were the major tocopherol and sterol compositions found in Celtis australis seed oil. Moreover, equivalent carbon number (ECN) analysis has indicated that the three linoleic acids are the main composition of the triacylglycerols extracted from Celtis australis. Also, the high value of omega 6 and β-sitosterol make this oil applicable in cosmetics and pharmaceutical applications.

Matched MeSH terms: Triglycerides/analysis*; Triglycerides/chemistry
Synthesis of conjugated linoleic acid-rich triacylglycerols by immobilized mutant lipase with excellent capability and recyclability

Lian W, Li D, Zhang L, Wang W, Faiza M, Tan CP, et al.

Enzyme Microb Technol, 2018 Oct;117:56-63.
PMID: 30037552 DOI: 10.1016/j.enzmictec.2018.06.007

Conjugated linoleic acid (CLA)-rich triacylglycerols (TAG) have received significant attention owing to their health promoting properties. In this study, CLA-rich TAG were successfully synthesized by an immobilized mutant lipase (MAS1-H108A)-catalyzed esterification of CLA-rich fatty acids and glycerol under vacuum. MAS1-H108A was first immobilized onto ECR1030 resin. Results showed that the lipase/support ratio of 41 mg/g was suitable for the immobilization and the thermostability of immobilized MAS1-H108A was greatly enhanced. Subsequently, the immobilized MAS1-H108A was employed for the synthesis of CLA-rich TAG and 95.21% TAG with 69.19% CLA was obtained under the optimized conditions. The TAG content (95.21%) obtained by immobilized MAS1-H108A is the reported highest value thus far, which was significantly higher than that (9.26%) obtained by Novozym 435 under the same conditions. Although the TAG content comparable to the results obtained in this study could also be obtained by Novozym 435, the used enzyme amount is approximately 5-fold of the immobilized MAS1-H108A. Additionally, the immobilized MAS1-H108A exhibited excellent recyclability during esterification retaining 95.11% of its initial activity after 10 batches. Overall, such immobilized mutant lipase with superior esterification activity and recyclability has the potential to be used in oils and fats industry.

Matched MeSH terms: Triglycerides/metabolism*; Triglycerides/chemistry
Fulltext Palm-based medium-and-long-chain triacylglycerol (P-MLCT): production via enzymatic interesterification and optimization using response surface methodology (RSM)

Lee YY, Tang TK, Phuah ET, Karim NA, Alwi SM, Lai OM

J Food Sci Technol, 2015 Feb;52(2):685-96.
PMID: 25694677 DOI: 10.1007/s13197-013-1065-0

Structured lipid such as medium-and long-chain triacylglycerol (MLCT) is claimed to be able to suppress body fat accumulation and be used to manage obesity. Response surface methodology (RSM) with four factors and three levels (+1,0,-1) faced centered composite design (FCCD) was employed for optimization of the enzymatic interesterification conditions of palm-based MLCT (P-MLCT) production. The effect of the four variables namely: substrate ratio palm kernel oil: palm oil, PKO:PO (40:60-100:0 w/w), temperature (50-70 °C), reaction time (0.5-7.5 h) and enzyme load (5-15 % w/w) on the P-MLCT yield (%) and by products (%) produced were investigated. The responses were determined via acylglycerol composition obtained from high performance liquid chromatography. Well-fitted models were successfully established for both responses: P-MLCT yield (R (2) = 0.9979) and by-products (R (2) = 0.9892). The P-MLCT yield was significantly (P 0.05). Substrate ratio PKO: PO (100:0 w/w) gave the highest yield of P-MLCT (61 %). Nonetheless, substrate ratio of PKO: PO (90:10w/w) was chosen to improve the fatty acid composition of the P-MLCT. The optimized conditions for substrate ratio PKO: PO (90:10 w/w) was 7.26 h, 50 °C and 5 % (w/w) Lipozyme TLIM lipase, which managed to give 60 % yields of P-MLCT. Up scaled results in stirred tank batch reactor gave similar yields as lab scale. A 20 % increase in P-MLCT yield was obtained via RSM. The effect of enzymatic interesterification on the physicochemical properties of PKO:PO (90:10 w/w) were also studied. Thermoprofile showed that the P-MLCT oil melted below body temperature of 37 °C.

Matched MeSH terms: Triglycerides
Fulltext Growth performance, plasma Fatty acids, villous height and crypt depth of preweaning piglets fed with medium chain triacylglycerol

Chwen LT, Foo HL, Thanh NT, Choe DW

Asian-Australas J Anim Sci, 2013 May;26(5):700-4.
PMID: 25049841 DOI: 10.5713/ajas.2012.12561

A study was conducted to investigate the effects of feeding medium chain triacylglycerol (MCT) on growth performance, plasma fatty acids, villus height and crypt depth in preweaning piglets. A total of 150 new born piglets were randomly assigned into one of three treatments: i) Control (no MCT); ii) MCT with milk (MCT+milk); iii) MCT without milk (MCT+fasting). Body weight, plasma fatty acid profiles, villus height and crypt depth were measured. Final BW for the Control and MCT+fasting was lower (p<0.05) than MCT+milk. The piglets fed with MCT regardless of milk provision or fasting had greater medium chain fatty acids (MCFA) than the Control. In contrast, the Control had greater long chain fatty acid (LCFA) and unsaturated fatty acid (USFA) than the MCT piglets. The piglets fed with MCT regardless of milk provision or fasting had higher villus height for the duodenum and jejunum after 6 h of feeding. Similar observations were found in piglets fed with MCT after 6 and 8 days of treatment. This study showed that feeding MCT to the piglets before weaning improved growth performance, with a greater concentration of MCT in blood plasma as energy source and a greater height of villus in duodenum, jejunum and ileum.

Matched MeSH terms: Triglycerides
Phosphatidylethanolamine N-methyltransferase gene rs7946 polymorphism plays a role in risk of nonalcoholic fatty liver disease: evidence from meta-analysis

Tan HL, Mohamed R, Mohamed Z, Zain SM

Pharmacogenet Genomics, 2016 Feb;26(2):88-95.
PMID: 26636496 DOI: 10.1097/FPC.0000000000000193

Phosphatidylethanolamine N-methyltransferase (PEMT) governs the secretion of hepatic triglycerides in the form of very low-density lipoprotein and has been implicated in nonalcoholic fatty liver disease (NAFLD). Studies on the role of the PEMT rs7946 polymorphism as a genetic modifier of NAFLD have reported inconsistent results. This meta-analysis was carried out to evaluate and summarize the association of PEMT rs7946 with susceptibility to NAFLD.

Matched MeSH terms: Triglycerides
Fulltext Utilisation of palm – based and beeswax coating on the postharvest-life of guava (Psidium guajava L.) during ambient and chilled storage

Ruzaina, I., Norizzah, A.R., Halimahton Zahrah, M.S., Cheow, C.S., Adi, M.S., Noorakmar, A.W., et al.

International Food Research Journal, 2013;20(1):265-274.
MyJurnal

Guava is a climacteric fruit which has high nutritional content. It is a highly perishable fruit, undergoes rapid postharvest ripening in a few days under ambient condition. This paper aims to determine the effect of palm stearin and palm kernel olein blends on maintaining the quality of guava during storage. Two different coating formulations of palm stearin (PS) and palm kernel olein (PKOo) blends (1:1 and 3:2) were analysed for their slip melting point (SMP), cohesiveness, viscosity and density. Beeswax was used as a commercial coating for comparison whiles the uncoated guava was used as control. These coatings were applied onto guavas by hand-wipe technique using a sponge. Guavas were dried in corrugated fibre board boxes and stored in an air-conditioned room maintained at 20°C while a chiller maintained at 10°C was used for chilled temperature. Coating pick up, thickness and surface area were measured while guava properties were analysed for coating effect on weight loss, O2 and CO2 gases, firmness and glossiness during storage at ambient temperature (20°C) for 21 days and chilled temperature (10ºC) for 30 days. Microstructure analysis was conducted within 2 days of coating at ambient temperature (20ºC). The results obtained indicated that 1:1 PSPKOo blends had higher cohesiveness compared to beeswax. Both PSPKOo blends significantly (p

Matched MeSH terms: Triglycerides
The effect of flow rate at different pressures and temperatures on cocoa butter extracted from cocoa nib using supercritical carbon dioxide

Asep EK, Jinap S, Russly AR, Jahurul MH, Ghafoor K, Zaidul IS

J Food Sci Technol, 2016 May;53(5):2287-97.
PMID: 27407195 DOI: 10.1007/s13197-016-2191-2

The effects of flow rate, different pressures and temperatures on cocoa butter extracted from cocoa nib using supercritical carbon dioxide (scCO2) were investigated. The yield was analyzed for total fat content, triacylglycerol (TG) profile, and fatty acid (FA) profile. Extractions were carried out at pressures of 20 and 35 MPa, temperatures of 50 and 60 °C, and CO2 flow rates of 0.5, 1, 2, 4 mL min(-1). The result shows that the yield of cocoa butter extract increased with increasing pressure, temperature, and flow rate and the optimum conditions for the maximum cocoa butter extraction were 35 MPa, 60 °C and 2 mL min(-1), repectively. TGs and FAs were found to be similar in composition to those of cocoa butter obtained by conventional methods. The lower molecular weight TGs and FAs showed higher selectivity compared to higher molecular weight TGs and FAs.

Matched MeSH terms: Triglycerides
Fulltext Extraction and determination of physico-chemical characteristics of Pili nut oil

Zarinah, Z., Maaruf, A.G., Nazaruddin, R., Wong, W.W.W., Xuebing, X.

International Food Research Journal, 2014;21(1):297-301.
MyJurnal

Canarium ovatum oil Engl. (pili nut oil) was extracted by using cold press method and then the
physico-chemical properties of the oil samples, roasted pili nut oil (RPNO) and unroasted pili
nut oil (UPNO) such as iodine value (IV), peroxide value (PV), acid value (% FFA), solid fat
content (SFC), fatty acid composition and triacylglycerol (TAG) composition were determined.
The percentage of oil yield and iodine value for RPNO and UPNO were showed no significant
different, wheareas there were significantly different for the peroxide value and percentage of
free fatty acid. The solid fat content for RPNO and UPNO were similar to the palm olein oil
and both completely melt at 25°C. Both samples, RPNO and UPNO were contained 50.70%
and 52.59% of oleic acid and were found not contain the trisaturated TAGs.

Matched MeSH terms: Triglycerides
Fulltext Comparison of melting behaviors of edible oils using conventional and hyper differential scanning calorimetric scan rates

Abdulkarim, S.M., Ghazali, H.M.

International Food Research Journal, 2007;14(1):25-35.
MyJurnal

HyperDSC™(fast scan rate) was used to study the melting behavior of canola (CLO), sunflower (SFO), palm olein (PO), rice bran oils (RBO), and cocoa butter (CB), and was compared to the melting behaviors using conventional DSC. There was an increase in sensitivity with increase in scan rate. Slow scan rate (5 to 20C/min) gave low sensitivity, which increased when the scan rates were increased to 50, 100 and 200C/min. Peak resolution was affected by scan rate depending on the sample weight. Increase in the size of sample coupled with the use of fast scan rate decreased the peak resolution. Generally small sample sizes gave better peak resolution. Results of the effect of scan rate on glass transition (Tg) shows that Tg, which is a weak transition especially in crystalline and low amorphous materials was not detected using conventional scan rates (5 to 20oC/min). It was however detected using of hyperDSC™ scan rates (100 to 200oC/min). Increasing the scan rate resulted in an increase in the peak temperature and the elimination of shoulder peaks, which were caused due to the polymorphic behavior of the triacylglycerols in the oils. The increase in peak temperature caused a shift in the peak position towards a higher temperature value. There is a positive correlation between the peak temperature and scan rate. The correlation coefficients (r) for CLO, SFO, PO, RBO and CB were 0.96, 0.95, 0.97, 0.96 and 0.96 respectively.

Matched MeSH terms: Triglycerides
Fulltext Influence of rice and added sugar intakes on fasting plasma glucose and triacylglycerol levels amongst a population sample of Malaysian adults

Zhi, Yee Lee, Chuan, Joshua Yung Foo, Mei, Qian Lim, Zheng, Xian Koh, Hui, Wendy Yi Wong, Kock, Tony Wai Ng

International e-Journal of Science, Medicine & Education, 2015;9(1):26-31.
MyJurnal

A recently published meta-analysis showed that each additional serving of rice increased risk of type 2 diabetes mellitus (DM) by an alarming 11%. We investigated whether this phenomenon is seen in the Malaysian population by studying the effect of rice intake and added sugar consumption on fasting plasma glucose (FPG) and fasting triacylglycerol (TAG).

Matched MeSH terms: Triglycerides
Fulltext Palm kernel oil blends as suppository bases in the delivery of aspirin

Noordin, M.I., Chung, L.Y.

JUMMEC, 2007;10(2):43-50.
MyJurnal

Rectal delivery of drugs has been proven to be effective in terms of drug absorption and distribution comparable with other routes such as oral, buccal, sublingual or even nasal. In this study, two new suppository bases were developed using combinations of locally sourced hydrogenated palm kernel oil, hydrogenated palm kernel stearin and hydrogenated palm kernel olein with mixtures of stearic acid and glyceryl monostearate. When formulated with aspirin, these bases produced suppositories with acceptable characteristics. These aspirin suppositories were tested on twelve healthy subjects after an approval from the Medical Ethics Committee, University of Malaya had been procured. We quantified aspirin from the urine samples of the subjects to determine the relative availability of the different suppository preparations relative to an oral dose. The excretion of salicylic acid, one of the metabolite of aspirin in human urine taking aspirin was quantified. The F value was found to range from 1.16 to 1.38. Hence, the excretion results showed that these palm kernel oil blends are suitable suppository bases.

Matched MeSH terms: Triglycerides
The use of enzymatically synthesized medium–and long-chain triacylglycerols (MLCT) oil blends in food application

Koh, S. P., Long, K., Yusoff, M. S. A., Arifin, N.

International Food Research Journal, 2011;18(1):355-366.
MyJurnal

The potential use of medium- and long-chain triacylglycerols (MLCT) oil blends in food applications such as frying oil and salad dressings were investigated. The frying strength of palm-based MLCT oil with different antioxidants under deep frying conditions was assessed. Palm-based MLCT oil showed better thermal-resistant oxidative strength than refined, bleached and deodorized (RBD) palm olein throughout the five consecutive days of frying. Sensory evaluation and rancidity assessment on fried chips showed no significant differences (P > 0.05) between chips fried in RBD palm olein and palm-based MLCT oil. MLCT-based salad dressings treated with different antioxidants showed similar rheological behaviors as compared to soybean based salad dressings. The overall quality of the physical appearance and organoleptic acceptability based on quantitative descriptive analysis showed no significant differences (P > 0.05) in all salad dressings. These findings indicated that MLCT-based oil blends can be used as healthy functional oil for daily consumption.

Matched MeSH terms: Triglycerides
Fulltext Neck circumference and its association with cardiometabolic risk factors: a systematic review and meta-analysis

Ataie-Jafari A, Namazi N, Djalalinia S, Chaghamirzayi P, Abdar ME, Zadehe SS, et al.

Diabetol Metab Syndr, 2018;10:72.
PMID: 30288175 DOI: 10.1186/s13098-018-0373-y

Background: Recently, neck circumference (NC) has been used to predict the risk of cardiometabolic factors. This study aimed to perform a systematic review and meta-analysis to examine: (i) the sensitivity (SE) and specificity (SP) of NC to predict cardiometabolic risk factors and (ii) the association between NC and the risk of cardiometabolic parameters.
Methods: A systematic search was conducted through PubMed/Medline, Institute of Scientific Information, and Scopus, until 2017 based on the search terms of metabolic syndrome (MetS) and cardio metabolic risk factors. Random-effect model was used to perform a meta-analysis and estimate the pooled SE, SP and correlation coefficient (CC).
Results: A total of 41 full texts were selected for systematic review. The pooled SE of greater NC to predict MetS was 65% (95% CI 58, 72) and 77% (95% CI 55, 99) in adult and children, respectively. Additionally, the pooled SP was 66% (95% CI 60, 72) and 66% (95% CI 48, 84) in adult and children, respectively. According to the results of meta-analysis in adults, NC had a positive and significant correlation with fasting blood sugar (FBS) (CC: 0.16, 95% CI 0.13, 0.20), HOMA-IR (0.38, 95% CI 0.25, 0.50), total cholesterol (TC) (0.07 95% CI 0.02, 0.12), triglyceride (TG) concentrations (0.23, 95% CI 0.19, 0.28) and low density lipoprotein cholesterol (LDL-C) (0.14, 95% CI 0.07, 0.22). Among children, NC was positively associated with FBS (CC: 0.12, 95% CI 0.07, 0.16), TG (CC: 0.21, 95% CI 0.17, 0.25), and TC concentrations (CC: 0.07, 95% CI 0.02, 0.12). However, it was not significant for LDL-C.
Conclusion: NC has a good predictive value to identify some cardiometabolic risk factors. There was a positive association between high NC and most cardiometabolic risk factors. However due to high heterogeneity, findings should be declared with caution.

Matched MeSH terms: Triglycerides
Hybrid liquid biphasic system for cell disruption and simultaneous lipid extraction from microalgae Chlorella sorokiniana CY-1 for biofuel production

Yew GY, Chew KW, Malek MA, Ho YC, Chen WH, Ling TC, et al.

Biotechnol Biofuels, 2019;12:252.
PMID: 31666807 DOI: 10.1186/s13068-019-1591-8

Background: The extraction of lipids from microalgae requires a pretreatment process to break the cell wall and subsequent extraction processes to obtain the lipids for biofuels production. The multistep operation tends to incur high costs and are energy intensive due to longer process operations. This research work applies the combination of radicals from hydrogen peroxide with an organic solvent as a chemical pretreatment method for disrupting the cell wall of microalgae and simultaneously extracting lipids from the biomass in a one-step biphasic solution.
Result: Several parameters which can affect the biphasic system were analyzed: contact time, volume of solvent, volume ratio, type of organic solvent, biomass amount and concentration of solvents, to extract the highest amount of lipids from microalgae. The results were optimized and up to 83.5% of lipid recovery yield and 94.6% of enhancement was successfully achieved. The results obtain from GC-FID were similar to the analysis of triglyceride lipid standard.
Conclusion: The profound hybrid biphasic system shows great potential to radically disrupt the cell wall of microalgae and instantaneously extract lipids in a single-step approach. The lipids extracted were tested to for its comparability to biodiesel performance.

Matched MeSH terms: Triglycerides
Effects of autochthonous probiotic feeding on performances, carcass traits, serum composition and faecal microflora of broiler chickens

Idoui T, Karam N

Sains Malaysiana, 2016;45:347-353.

The objective of this study was to investigate the effect of autochthonous Lactobacillus plantarum feeding on growth performance, carcass traits, serum composition and faecal microflora of broiler chickens. The results showed a significant positive effect (p< 0.05) of probiotic on body weight and feed conversion ratio. Coliform counts in the fecal matter of broiler chickens receiving probiotic were lower than the analogous population in control birds (p<0.05). In contrary, lactic acid bacteria (LAB) number increased (p<0.05) in fecal matter of experimental group. At the end of the study, the degree of serum cholesterol reduction resulted in a 20.31% compared to the control group (p<0.05). The experimental group had significantly lower serum triglycerides (p<0.05). It was concluded that autochthonous probiotic improved growth and feed efficiency in broilers chickens and considering the improvements in carcass traits. This probiotic possess the property of reducing cholesterol and triglycerides in the blood and possess a positive effect on the gut microflora.

Matched MeSH terms: Triglycerides
Biodiesel production from fish (cyprinus carpio) waste and evaluation of engine performance

Mohammed Saifuddin, Amru N. Boyce

Sains Malaysiana, 2017;46:1771-1778.

As fossil energy resources are depleting quick and energy security is playing a vital role in the world economy. Quest for alternative energy sources have turned researches investigation in waste foods for next generation fuel. Biodiesel is usually considered to be environmentally friendly as it reduces greenhouse gas emission. Fish wastes rich in fatty acids and can be used as the raw material to produce biodiesel through transesterification reaction. The results showed that the seven peaks are fatty acid methyl esters, indicating all the triglycerides were successfully methylated to methyl esters. Fish based biodiesel provided a significant reduction in carbon monoxide (CO) and hydrocarbon (HC) emissions under engine loads of 15 (Nm) and required no engine modification. The viscosity of the produced biodiesel was within the range of international standards (ASTM). The biodiesel was found to contain a low base number and exhibited a lower specific fuel consumption compared to the conventional diesel. It can be concluded that biodiesel derived from waste fish oil can be considered as a potential source of commercial biodiesel.

Matched MeSH terms: Triglycerides

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