The adulteration concentration of palm kernel oil(PKO)in virgin coconut oil(VCO)was quantified using near-infrared(NIR)hyperspectral imaging.Nowadays,some VCO is adulterated with lower-priced PKO to reduce production ...The adulteration concentration of palm kernel oil(PKO)in virgin coconut oil(VCO)was quantified using near-infrared(NIR)hyperspectral imaging.Nowadays,some VCO is adulterated with lower-priced PKO to reduce production costs,which diminishes the quality of the VCO.This study used NIR hyperspectral imaging in the wavelength region 900-1,650 nm to create a quantitative model for the detection of PKO contaminants(0-100%)in VCO and to develop predictive mapping.The prediction equation for the adulteration of VCO with PKO was constructed using the partial least squares regression method.The best predictive model was pre-processed using the standard normal variate method,and the coefficient of determination of prediction was 0.991,the root mean square error of prediction was 2.93%,and the residual prediction deviation was 10.37.The results showed that this model could be applied for quantifying the adulteration concentration of PKO in VCO.The prediction adulteration concentration mapping of VCO with PKO was created from a calibration model that showed the color level according to the adulteration concentration in the range of 0-100%.NIR hyperspectral imaging could be clearly used to quantify the adulteration of VCO with a color level map that provides a quick,accurate,and non-destructive detection method.展开更多
Coconut oil contains a rich amount of medium-chain fatty acids,including lauric acid,decanoic acid,and octanoic acid,as well as the corresponding medium-chain triglycerides.It possesses functional attributes such as f...Coconut oil contains a rich amount of medium-chain fatty acids,including lauric acid,decanoic acid,and octanoic acid,as well as the corresponding medium-chain triglycerides.It possesses functional attributes such as facile digestion and absorption,as well as antibacterial and antioxidant properties.The study utilized the Citespace and VOSviewer visual analysis software to examine the quantity of published papers,authors,publishing institutions,research hotspots and frontiers of 3442 effective literatures on the theme of"coconut oil"in the Web of Science(WoS)Core Collection database.The research on coconut oil can be condensed into four primary sections:(1)investigation and utilization of physiochemical characteristics of coconut oil,(2)analysis of nutritional composition and study of the effectiveness of coconut oil,(3)identification of adulteration in coconut oil,(4)evaluation of the impact of coconut oil as a dietary supplement on animal metabolism.Additionally,research focal points have evolved in three distinct phases.Prior to 2008,numerous studies were conducted to investigate the precise fatty acid makeup of coconut oil and its potential for lowering cholesterol levels.From 2009 to 2016,significant emphasis was placed on examining the impact of coconut oil on methane production in ruminants.Between 2018 to 2023,the main focus will be on investigating how nanoparticles can alter the properties of coconut oil.In the future,the anticipated research areas of interest are expected to focus on the rapid detection method of coconut oil,the efficacy of coconut oil and the advancement of coconut resources.The objective of this review is to provide researchers with relevant information about coconut oil,aiming to foster the continued growth of the coconut oil industry.展开更多
Permeation of Cu(Ⅱ) from its aqueous solution through a supported liquid membrane (SLM) containing di(2-ethylhexyl)phosphoric acid (D2EHPA) carrier dissolved in coconut oil has been studied. The effects of C...Permeation of Cu(Ⅱ) from its aqueous solution through a supported liquid membrane (SLM) containing di(2-ethylhexyl)phosphoric acid (D2EHPA) carrier dissolved in coconut oil has been studied. The effects of Cu(Ⅱ), pH (in feed), H2SO4 (stripping) and D2EHPA (in membrane) concentrations have been investigated. The stability of the D2EHPA-coconut oil has also been evaluated. High Cu(Ⅱ) concentration in the feed leads to an increase in flux from 4.1 × 10^-9 to 8.9 × 10^-9 mol/(m^2·s) within the Cu(Ⅱ) concentration range 7.8×10^-4-78.6×10^-4 mol/L at pH of 4.0 in the feed and 12.4 × 10^-4 mol/L D2EHPA in the membrane phase. Increase in H2SO4 concentration in strip solution leads to an increase in copper ions flux up to 0.25 mol/L H2SO4, providing a maximum flux of 7.4 × 10^-9 mol/(m^2·s). The optimum conditions for Cu(Ⅱ) transport are, pH of feed 4.0, 0.25 mol/L H2SO4 in strip phase and 12.4 × 10^-4 mol/L D2EHPA (membrane) in 0.5 μm pore size polytetrafluoroethylene (PTFE) membrane. It has been observed that Cu(Ⅱ) flux across the membrane tends to increase with the concentration of copper ions. Application of the method developed to copper plating bath rinse solutions has been found to be successful in the recovery of Cu(Ⅱ).展开更多
The aim of this study was to develop the water compatible form of coconut oil through nanoemulsification. The effect of different types and amounts of surfactants on the physical characteristics of nanoemulsions conta...The aim of this study was to develop the water compatible form of coconut oil through nanoemulsification. The effect of different types and amounts of surfactants on the physical characteristics of nanoemulsions containing coconut oil was investigated. Coconut oil nanoemulsions containing varied amounts of surfactants including polyethylene glycol octyl phenyl ether(PGO), polyoxyethylene sorbitan monostearate(POS), polyethylene glycol hydrogenated castor oil(PHC), sodium lauryl sulfate(SLS) and poloxamer 407(PLX) were formulated and comparatively evaluated for their physical properties. The results showed that the coconut oil nanoemulsions using PGO, POS and PHC as surfactants exhibited low percent creaming index indicating excellent stability, while those containing SLS and PLX demonstrated the higher percent creaming index suggesting lesser physical stability. The droplet sizes of nanoemulsions consisting of 5%(w/w) PGO, POS and PHC were 22.843, 4.458 and 0.162 μm, respectively. Thus, coconut oil nanoemulsions with the smallest size could be obtained when PHC was applied. Furthermore, the droplet size of nanoemulsions decreased from 33 μm to less than 200 nm with an increase in the amount of PHC from 1% to 10%(w/w). Additionally, the properties of coconut oil based nanoemulsions containing PHC were not changed through temperature cycling test. From these results, it was suggested that the fabrication of stable coconut oil nanoemulsions with small particle size could be easily achieved by using 5%(w/w) PHC as a surfactant. The knowledge gained from the study might provide the basic guideline for the fabrication of stable nanoemulsions for food, cosmetic and pharmaceutical fields in the future.展开更多
Oxidative stress has been discovered to be involved in the progression of diabetes mellitus. The antioxidant properties of virgin coconut oil (VCO) among other functions might have a beneficial effect in ameliorating ...Oxidative stress has been discovered to be involved in the progression of diabetes mellitus. The antioxidant properties of virgin coconut oil (VCO) among other functions might have a beneficial effect in ameliorating the disease. This study was aimed to determine the glycemic and antioxidant effects of VCO in alloxan induced diabetic rats. 24 male Sprague-Dawley rats were divided into 4 groups as follows: control (C), diabetes untreated (DUT), diabetes treated with 7.5 ml/kg VCO (DT7.5) and diabetes treated with 10 ml/kg VCO (DT10). Alloxan (100 mg/kg b.w I.P) was used to induce diabetes and VCO was administered orally once daily for 4 weeks. Fasting blood glucose level was measured on Day 0 (72 hours post alloxan injection) and after 4 weeks. Glucose tolerance test was conducted on the 4th week as well as the determination of serum insulin and liver antioxidant parameters using standard biochemical methods. Values are means ± S.E.M., compared by ANOVA and Tukey’s post hoc test. The results show that VCO significantly reduced the fasting blood glucose level in DT7.5 rats (132.4 ± 6.911) and DT10 rats (131.6 ± 12.2) are compared with DUT rats (320.4 ± 22.99) and improved the oral glucose tolerance. Serum insulin was increased in DT10 rats. GSH activities significantly increased p 10 rats (0.39 ± 0.022) when compared to DUT rats (0.032 ± 0.004). CAT activities also significantly increased p 7.5 (17.63 ± 0.61) and DT10 rats (30.88 ± 0.97) when compared to DUT rats (10.98 ± 0.6). SOD activities significantly increased p 0.05 in DT7.5 (2.634 ± 0.04) and DT10 rats (2.258 ± 0.32) when compared to DUT rats (1.366 ± 0.05) while MDA significantly reduced p 7.5 (49.16 ± 0.51) and DT10 (33.64 ± 0.42) rats when compared to DUT rats (99.93 ± 4.79). This study revealed that VCO has a hypoglycemic action, enhances insulin secretion and also ameliorates oxidative stress induced in type I (alloxan-induced diabetic) male rats.展开更多
Coconut oil (CO) has generated discussions about its possible effects on health, especially for being an oil rich in saturated fat, which is known to contribute to the development of atherosclerosis and cardiovascular...Coconut oil (CO) has generated discussions about its possible effects on health, especially for being an oil rich in saturated fat, which is known to contribute to the development of atherosclerosis and cardiovascular diseases. On the other hand, CO contains high levels of lauric acid that is directly absorbed by enterocytes and may prevent the fat deposition in blood vessels. In addition, flavonoids and polyphenols present in CO may be beneficial in reducing the oxidative stress involved in the etiology of various diseases, for instance, cardiovascular diseases and cancer. This article aimed to review the likely benefits of CO and its effects related to oxidative stress, hyperlipidemia and chronicle diseases in humans.展开更多
The objective of the study was to evaluate the effects of different vegetable oils [red palm olein (RPO), palm olein (PO), corn oil (CO) and coconut oil (COC)] on lipid profile in rat. Sixty six Sprague Dawley male ra...The objective of the study was to evaluate the effects of different vegetable oils [red palm olein (RPO), palm olein (PO), corn oil (CO) and coconut oil (COC)] on lipid profile in rat. Sixty six Sprague Dawley male rats were randomly divided into eleven groups of 6 rats per group and were treated with 15% concentrations of RPO, PO, CO and COC for 4 and 8 weeks. Rats in control group were given normal rat pellet only while in treated groups 15% of additional vegetable oils were given. The results at 4 weeks showed a decline in Low Density Lipoprotein Cholesterol (LDL-C) values at RPO and PO groups whereas in CO and COC groups the LDL-C were increased compared to the control group. The High Density Lipoprotein Cholesterol (HDL-C) values increased in RPO and PO groups whereas it was declined in CO and COC groups compared to the control group. At 8 weeks, there was no significant difference (P ≥ 0.05) in HDL-C of rats treated with vegetable oils compared to the control group. However, the LDL-C in RPO and PO was significantly decreased (P ≤ 0.05) in the LDL-C and there was no significant difference (P≥0.05) for CO and COC groups compared to the control groups. The mean value of the LDL-C after 8 weeks in the control group, RPO, PO, CO, and COC groups were 66.1 mg/dl, 31.9 mg/dl, 41.1 mg/dl, 50.41 mg/dl and 54.31 mg/dl respectively. There was significant decreased (P ≤ 0.05) in the total cholesterol (TC) in RPO group for 4 weeks compared to the control group while the TC in PO, CO and COC were within the normal range. The results of TC in all treated rats for 8 weeks were within the normal range. There was no significant difference in TC of rats treated with vegetable oils compared to the control group. Triglycerides (TG) in all treated rats for 4 weeks were within the normal range whereas the TG in RPO, PO and CO groups for 8 weeks were significant increase (P ≤ 0.05) compared to the control group but there was no significant difference between the control group and COC group.展开更多
The current energy crisis could be alleviated by enhancing energy generation using the abundant biomass waste resources. Agricultural and forest wastes are the leading organic waste streams that can be transformed int...The current energy crisis could be alleviated by enhancing energy generation using the abundant biomass waste resources. Agricultural and forest wastes are the leading organic waste streams that can be transformed into useful alternative energy resources. Pyrolysis is one of the technologies for converting biomass into more valuable products, such as bio-oil, bio-char, and syngas. This work investigated the production of bio-oil through batch pyrolysis technology. A fixed bed pyrolyzer was designed and fabricated for bio-oil production. The major components of the system include a fixed bed reactor, a condenser, and a bio-oil collector. The reactor was heated using a cylindrical biomass external heater. The pyrolysis process was carried out in a reactor at a pressure of 1atm and a varying operating temperature of 150˚C, 250˚C, 350˚C to 450˚C for 120 minutes. The mass of 1kg of coconut fiber was used with particle sizes between 2.36 mm - 4.75 mm. The results show that the higher the temperature, the more volume of bio-oil produced, with the highest yield being 39.2%, at 450˚C with a heating rate of 10˚C/min. The Fourier transformation Infrared (FTIR) Spectroscopy analysis was used to analyze the bio-oil components. The obtained bio-oil has a pH of 2.4, a density of 1019.385 kg/m<sup>3</sup>, and a calorific value of 17.5 MJ/kg. The analysis also showed the presence of high-oxygenated compounds;carboxylic acids, phenols, alcohols, and branched oxygenated hydrocarbons as the main compounds present in the bio-oil. The results inferred that the liquid product could be bestowed as an alternative resource for polycarbonate material production.展开更多
The coconut tree(Cocos nucifera)which is also known as the“Tree of life”has its own values in each part of the tree and coconut oil is more prestigious among them.At present,the consumption of coconut oil is booming...The coconut tree(Cocos nucifera)which is also known as the“Tree of life”has its own values in each part of the tree and coconut oil is more prestigious among them.At present,the consumption of coconut oil is booming all around the world owing to its tremendous health benefits.The unique chemical composition of coconut oil enriched with medium chain fatty acids(MCFAs)has led to the exploration of these nutritional and therapeutic influences.Unlike the long chain fatty acids(LCFAs),the MCFAs generated from the digestion of medium chain triglycerides(MCTs)has a specific pathway for the metabolism,as it bypasses the lymphatic system and enter the liver directly through the portal vein.Due to such distinct attributes in absorption and metabolism,MCTs are readily capable of forming ketone bodies than other triglycerides.These ketone bodies are a competent energy source for the brains,especially those having cognitive impairments like Alzheimer's disease(AD).AD is a neurodegenerative disease characterized clinically by accelerating shortfalls in memory and behavioral changes.The principal biochemical hallmarks behind the pathogenesis of AD are the development of extracellular amyloidβplaques and the accumulation of intracellular neurofibrillary tangles.Occurrence of Cardiovascular diseases(CVD)with elevated LDL levels,hypertension,Type 2 diabetes,obesity,and insulin resistance are some key risk factors that are responsible for the increasing prevalence and incidence of AD.There is sufficient evidence to prove that MCTs in coconut oil are metabolized and absorbed in such a way that retards the severity of these physiological risk factors.Besides,coconut oil is endowed with many polyphenolic compounds that are serving as antioxidants by combating oxidative stress and inflammation,which in turn downregulates the etiology of AD.But depending on the different processing conditions applied in extraction techniques of coconut oil,variations in antioxidant capacity can take place.Even though there are inadequacies in peer-reviewed large cohort clinical data for the long run,this article reviews that coconut oil,its constituents,and metabolism have positive findings on the potentiality to treat AD as a nutritional supplement.展开更多
The purpose of this study was to investigate the effect of different dietary coconut oil(CO)levels on growth,antioxidant capacity and lipid metabolism of juvenile large yellow croaker(Larimichthys crocea).Five iso-nit...The purpose of this study was to investigate the effect of different dietary coconut oil(CO)levels on growth,antioxidant capacity and lipid metabolism of juvenile large yellow croaker(Larimichthys crocea).Five iso-nitrogen(45%crude protein)and iso-lipid(13%crude lipid)experimental diets were prepared by replacing 0%(the control),25%,50%,75%and 100%fish oil with coconut oil.The results showed that dietary CO had no significant effect on survival rate(SR.P>0.05).However,the specific growth rate was increased significantly when compared with the control group when fish were fed the diet with 50%CO(P<0.05).The saturated fatty acids were increased significantly with increasing dietary CO in the liver and muscle,whereas the content of n-3 PUFA was decreased significantly(P<0.05).The highest activities of glutathione peroxidase and superoxide dismutase in the liver were recorded in fish-fed diet with 50%CO;conversely,the content of malondialdehyde was significantly decreased(P<0.05).The mRNA expression of peroxisome proliferator-activated receptor a,carnitine palmitoyl transferase 1 and acyl-CoA oxidase reached the highest levels in fish-fed diet with 50%CO.To some extent,this indicated that the rapid oxidation reaction of fatty acids to provide energy may be the reason for the rapid growth of large yellow croaker.In conclusion,fish-fed diet with 50%CO increased the growth rate and antioxidant capacity.Therefore,the optimal replacement level of CO to FO in the diet should be 50%.展开更多
Analysis of Volatile Organic Compounds (VOCs) in crude coconut and petroleum oils from Nigeria is reported. Using head-space gas chromatography with a flame ionization detector and mass spectrometer, 8 VOCs were found...Analysis of Volatile Organic Compounds (VOCs) in crude coconut and petroleum oils from Nigeria is reported. Using head-space gas chromatography with a flame ionization detector and mass spectrometer, 8 VOCs were found in crude coconut oil and 29 VOCs were identified in crude petroleum oil. Crude coconut oil contained two aromatic, two nitrogenated, and four oxygenated compounds. Alkane, alkene, alkyne, halogenated, and sulfur compounds were absent in crude coconut oil but not in crude petroleum oil. The same observation held true for naphthalene. Conversely, benzofuran was absent in crude petroleum oil but was present in crude coconut oil at a concentration of 1.38 part-per-billion (ppb). The most concentrated VOC in crude coconut oil was dodecanoic acid at 9.98 ppb and that of crude petroleum oil was toluene at 12.61 ppb. Total VOC concentrations in crude coconut and petroleum oils are 20.49 and 87.46 ppb, respectively. These results are helpful in characterizing the chemical signature of Nigerian crude coconut oil for potential forensics use or in biofuel research.展开更多
基金supported by the Thailand Research Fund through the Royal Golden Jubilee Ph.D.Program(PHD/0225/2561)the Faculty of Engineering,Kamphaeng Saen Campus,Kasetsart University,Thailand。
文摘The adulteration concentration of palm kernel oil(PKO)in virgin coconut oil(VCO)was quantified using near-infrared(NIR)hyperspectral imaging.Nowadays,some VCO is adulterated with lower-priced PKO to reduce production costs,which diminishes the quality of the VCO.This study used NIR hyperspectral imaging in the wavelength region 900-1,650 nm to create a quantitative model for the detection of PKO contaminants(0-100%)in VCO and to develop predictive mapping.The prediction equation for the adulteration of VCO with PKO was constructed using the partial least squares regression method.The best predictive model was pre-processed using the standard normal variate method,and the coefficient of determination of prediction was 0.991,the root mean square error of prediction was 2.93%,and the residual prediction deviation was 10.37.The results showed that this model could be applied for quantifying the adulteration concentration of PKO in VCO.The prediction adulteration concentration mapping of VCO with PKO was created from a calibration model that showed the color level according to the adulteration concentration in the range of 0-100%.NIR hyperspectral imaging could be clearly used to quantify the adulteration of VCO with a color level map that provides a quick,accurate,and non-destructive detection method.
基金This study is supported by the Key Laboratory for Deep Processing of Major Grain and Oil,Ministry of Education(Wuhan Polytechnic University)(No.DZLY2022008)Hubei Key Laboratory for Processing and Transformation of Agricultural Products(Wuhan Polytechnic University)(No.NJZ2022008).
文摘Coconut oil contains a rich amount of medium-chain fatty acids,including lauric acid,decanoic acid,and octanoic acid,as well as the corresponding medium-chain triglycerides.It possesses functional attributes such as facile digestion and absorption,as well as antibacterial and antioxidant properties.The study utilized the Citespace and VOSviewer visual analysis software to examine the quantity of published papers,authors,publishing institutions,research hotspots and frontiers of 3442 effective literatures on the theme of"coconut oil"in the Web of Science(WoS)Core Collection database.The research on coconut oil can be condensed into four primary sections:(1)investigation and utilization of physiochemical characteristics of coconut oil,(2)analysis of nutritional composition and study of the effectiveness of coconut oil,(3)identification of adulteration in coconut oil,(4)evaluation of the impact of coconut oil as a dietary supplement on animal metabolism.Additionally,research focal points have evolved in three distinct phases.Prior to 2008,numerous studies were conducted to investigate the precise fatty acid makeup of coconut oil and its potential for lowering cholesterol levels.From 2009 to 2016,significant emphasis was placed on examining the impact of coconut oil on methane production in ruminants.Between 2018 to 2023,the main focus will be on investigating how nanoparticles can alter the properties of coconut oil.In the future,the anticipated research areas of interest are expected to focus on the rapid detection method of coconut oil,the efficacy of coconut oil and the advancement of coconut resources.The objective of this review is to provide researchers with relevant information about coconut oil,aiming to foster the continued growth of the coconut oil industry.
文摘Permeation of Cu(Ⅱ) from its aqueous solution through a supported liquid membrane (SLM) containing di(2-ethylhexyl)phosphoric acid (D2EHPA) carrier dissolved in coconut oil has been studied. The effects of Cu(Ⅱ), pH (in feed), H2SO4 (stripping) and D2EHPA (in membrane) concentrations have been investigated. The stability of the D2EHPA-coconut oil has also been evaluated. High Cu(Ⅱ) concentration in the feed leads to an increase in flux from 4.1 × 10^-9 to 8.9 × 10^-9 mol/(m^2·s) within the Cu(Ⅱ) concentration range 7.8×10^-4-78.6×10^-4 mol/L at pH of 4.0 in the feed and 12.4 × 10^-4 mol/L D2EHPA in the membrane phase. Increase in H2SO4 concentration in strip solution leads to an increase in copper ions flux up to 0.25 mol/L H2SO4, providing a maximum flux of 7.4 × 10^-9 mol/(m^2·s). The optimum conditions for Cu(Ⅱ) transport are, pH of feed 4.0, 0.25 mol/L H2SO4 in strip phase and 12.4 × 10^-4 mol/L D2EHPA (membrane) in 0.5 μm pore size polytetrafluoroethylene (PTFE) membrane. It has been observed that Cu(Ⅱ) flux across the membrane tends to increase with the concentration of copper ions. Application of the method developed to copper plating bath rinse solutions has been found to be successful in the recovery of Cu(Ⅱ).
基金the Thailand Research Fund,Com-mission on Higher Education(Thailand)Silpakorn University Research and Development Institute+1 种基金Faculty of Pharmacy,Sil-pakorn UniversityFaculty of Pharmacy,Siam University-for research funding
文摘The aim of this study was to develop the water compatible form of coconut oil through nanoemulsification. The effect of different types and amounts of surfactants on the physical characteristics of nanoemulsions containing coconut oil was investigated. Coconut oil nanoemulsions containing varied amounts of surfactants including polyethylene glycol octyl phenyl ether(PGO), polyoxyethylene sorbitan monostearate(POS), polyethylene glycol hydrogenated castor oil(PHC), sodium lauryl sulfate(SLS) and poloxamer 407(PLX) were formulated and comparatively evaluated for their physical properties. The results showed that the coconut oil nanoemulsions using PGO, POS and PHC as surfactants exhibited low percent creaming index indicating excellent stability, while those containing SLS and PLX demonstrated the higher percent creaming index suggesting lesser physical stability. The droplet sizes of nanoemulsions consisting of 5%(w/w) PGO, POS and PHC were 22.843, 4.458 and 0.162 μm, respectively. Thus, coconut oil nanoemulsions with the smallest size could be obtained when PHC was applied. Furthermore, the droplet size of nanoemulsions decreased from 33 μm to less than 200 nm with an increase in the amount of PHC from 1% to 10%(w/w). Additionally, the properties of coconut oil based nanoemulsions containing PHC were not changed through temperature cycling test. From these results, it was suggested that the fabrication of stable coconut oil nanoemulsions with small particle size could be easily achieved by using 5%(w/w) PHC as a surfactant. The knowledge gained from the study might provide the basic guideline for the fabrication of stable nanoemulsions for food, cosmetic and pharmaceutical fields in the future.
文摘Oxidative stress has been discovered to be involved in the progression of diabetes mellitus. The antioxidant properties of virgin coconut oil (VCO) among other functions might have a beneficial effect in ameliorating the disease. This study was aimed to determine the glycemic and antioxidant effects of VCO in alloxan induced diabetic rats. 24 male Sprague-Dawley rats were divided into 4 groups as follows: control (C), diabetes untreated (DUT), diabetes treated with 7.5 ml/kg VCO (DT7.5) and diabetes treated with 10 ml/kg VCO (DT10). Alloxan (100 mg/kg b.w I.P) was used to induce diabetes and VCO was administered orally once daily for 4 weeks. Fasting blood glucose level was measured on Day 0 (72 hours post alloxan injection) and after 4 weeks. Glucose tolerance test was conducted on the 4th week as well as the determination of serum insulin and liver antioxidant parameters using standard biochemical methods. Values are means ± S.E.M., compared by ANOVA and Tukey’s post hoc test. The results show that VCO significantly reduced the fasting blood glucose level in DT7.5 rats (132.4 ± 6.911) and DT10 rats (131.6 ± 12.2) are compared with DUT rats (320.4 ± 22.99) and improved the oral glucose tolerance. Serum insulin was increased in DT10 rats. GSH activities significantly increased p 10 rats (0.39 ± 0.022) when compared to DUT rats (0.032 ± 0.004). CAT activities also significantly increased p 7.5 (17.63 ± 0.61) and DT10 rats (30.88 ± 0.97) when compared to DUT rats (10.98 ± 0.6). SOD activities significantly increased p 0.05 in DT7.5 (2.634 ± 0.04) and DT10 rats (2.258 ± 0.32) when compared to DUT rats (1.366 ± 0.05) while MDA significantly reduced p 7.5 (49.16 ± 0.51) and DT10 (33.64 ± 0.42) rats when compared to DUT rats (99.93 ± 4.79). This study revealed that VCO has a hypoglycemic action, enhances insulin secretion and also ameliorates oxidative stress induced in type I (alloxan-induced diabetic) male rats.
文摘Coconut oil (CO) has generated discussions about its possible effects on health, especially for being an oil rich in saturated fat, which is known to contribute to the development of atherosclerosis and cardiovascular diseases. On the other hand, CO contains high levels of lauric acid that is directly absorbed by enterocytes and may prevent the fat deposition in blood vessels. In addition, flavonoids and polyphenols present in CO may be beneficial in reducing the oxidative stress involved in the etiology of various diseases, for instance, cardiovascular diseases and cancer. This article aimed to review the likely benefits of CO and its effects related to oxidative stress, hyperlipidemia and chronicle diseases in humans.
文摘The objective of the study was to evaluate the effects of different vegetable oils [red palm olein (RPO), palm olein (PO), corn oil (CO) and coconut oil (COC)] on lipid profile in rat. Sixty six Sprague Dawley male rats were randomly divided into eleven groups of 6 rats per group and were treated with 15% concentrations of RPO, PO, CO and COC for 4 and 8 weeks. Rats in control group were given normal rat pellet only while in treated groups 15% of additional vegetable oils were given. The results at 4 weeks showed a decline in Low Density Lipoprotein Cholesterol (LDL-C) values at RPO and PO groups whereas in CO and COC groups the LDL-C were increased compared to the control group. The High Density Lipoprotein Cholesterol (HDL-C) values increased in RPO and PO groups whereas it was declined in CO and COC groups compared to the control group. At 8 weeks, there was no significant difference (P ≥ 0.05) in HDL-C of rats treated with vegetable oils compared to the control group. However, the LDL-C in RPO and PO was significantly decreased (P ≤ 0.05) in the LDL-C and there was no significant difference (P≥0.05) for CO and COC groups compared to the control groups. The mean value of the LDL-C after 8 weeks in the control group, RPO, PO, CO, and COC groups were 66.1 mg/dl, 31.9 mg/dl, 41.1 mg/dl, 50.41 mg/dl and 54.31 mg/dl respectively. There was significant decreased (P ≤ 0.05) in the total cholesterol (TC) in RPO group for 4 weeks compared to the control group while the TC in PO, CO and COC were within the normal range. The results of TC in all treated rats for 8 weeks were within the normal range. There was no significant difference in TC of rats treated with vegetable oils compared to the control group. Triglycerides (TG) in all treated rats for 4 weeks were within the normal range whereas the TG in RPO, PO and CO groups for 8 weeks were significant increase (P ≤ 0.05) compared to the control group but there was no significant difference between the control group and COC group.
文摘The current energy crisis could be alleviated by enhancing energy generation using the abundant biomass waste resources. Agricultural and forest wastes are the leading organic waste streams that can be transformed into useful alternative energy resources. Pyrolysis is one of the technologies for converting biomass into more valuable products, such as bio-oil, bio-char, and syngas. This work investigated the production of bio-oil through batch pyrolysis technology. A fixed bed pyrolyzer was designed and fabricated for bio-oil production. The major components of the system include a fixed bed reactor, a condenser, and a bio-oil collector. The reactor was heated using a cylindrical biomass external heater. The pyrolysis process was carried out in a reactor at a pressure of 1atm and a varying operating temperature of 150˚C, 250˚C, 350˚C to 450˚C for 120 minutes. The mass of 1kg of coconut fiber was used with particle sizes between 2.36 mm - 4.75 mm. The results show that the higher the temperature, the more volume of bio-oil produced, with the highest yield being 39.2%, at 450˚C with a heating rate of 10˚C/min. The Fourier transformation Infrared (FTIR) Spectroscopy analysis was used to analyze the bio-oil components. The obtained bio-oil has a pH of 2.4, a density of 1019.385 kg/m<sup>3</sup>, and a calorific value of 17.5 MJ/kg. The analysis also showed the presence of high-oxygenated compounds;carboxylic acids, phenols, alcohols, and branched oxygenated hydrocarbons as the main compounds present in the bio-oil. The results inferred that the liquid product could be bestowed as an alternative resource for polycarbonate material production.
文摘The coconut tree(Cocos nucifera)which is also known as the“Tree of life”has its own values in each part of the tree and coconut oil is more prestigious among them.At present,the consumption of coconut oil is booming all around the world owing to its tremendous health benefits.The unique chemical composition of coconut oil enriched with medium chain fatty acids(MCFAs)has led to the exploration of these nutritional and therapeutic influences.Unlike the long chain fatty acids(LCFAs),the MCFAs generated from the digestion of medium chain triglycerides(MCTs)has a specific pathway for the metabolism,as it bypasses the lymphatic system and enter the liver directly through the portal vein.Due to such distinct attributes in absorption and metabolism,MCTs are readily capable of forming ketone bodies than other triglycerides.These ketone bodies are a competent energy source for the brains,especially those having cognitive impairments like Alzheimer's disease(AD).AD is a neurodegenerative disease characterized clinically by accelerating shortfalls in memory and behavioral changes.The principal biochemical hallmarks behind the pathogenesis of AD are the development of extracellular amyloidβplaques and the accumulation of intracellular neurofibrillary tangles.Occurrence of Cardiovascular diseases(CVD)with elevated LDL levels,hypertension,Type 2 diabetes,obesity,and insulin resistance are some key risk factors that are responsible for the increasing prevalence and incidence of AD.There is sufficient evidence to prove that MCTs in coconut oil are metabolized and absorbed in such a way that retards the severity of these physiological risk factors.Besides,coconut oil is endowed with many polyphenolic compounds that are serving as antioxidants by combating oxidative stress and inflammation,which in turn downregulates the etiology of AD.But depending on the different processing conditions applied in extraction techniques of coconut oil,variations in antioxidant capacity can take place.Even though there are inadequacies in peer-reviewed large cohort clinical data for the long run,this article reviews that coconut oil,its constituents,and metabolism have positive findings on the potentiality to treat AD as a nutritional supplement.
基金Acknowledgments This research was supported by the National Science Fund for Distinguished Young Scholars of China[grant number:31525024]the China Agriculture Research System[Grant number:CARS47-11]+2 种基金Aoshan Talents Program Sup ported by Qingdao National Laboratory for Marine Science and Technology[Grant number:2O15ASTP]Key Program of National Natural Science Foundation of China[Grant number:318301031]Scientific and Technological Innovation of Blue Granary[Grant number:2018YFD0900402].
文摘The purpose of this study was to investigate the effect of different dietary coconut oil(CO)levels on growth,antioxidant capacity and lipid metabolism of juvenile large yellow croaker(Larimichthys crocea).Five iso-nitrogen(45%crude protein)and iso-lipid(13%crude lipid)experimental diets were prepared by replacing 0%(the control),25%,50%,75%and 100%fish oil with coconut oil.The results showed that dietary CO had no significant effect on survival rate(SR.P>0.05).However,the specific growth rate was increased significantly when compared with the control group when fish were fed the diet with 50%CO(P<0.05).The saturated fatty acids were increased significantly with increasing dietary CO in the liver and muscle,whereas the content of n-3 PUFA was decreased significantly(P<0.05).The highest activities of glutathione peroxidase and superoxide dismutase in the liver were recorded in fish-fed diet with 50%CO;conversely,the content of malondialdehyde was significantly decreased(P<0.05).The mRNA expression of peroxisome proliferator-activated receptor a,carnitine palmitoyl transferase 1 and acyl-CoA oxidase reached the highest levels in fish-fed diet with 50%CO.To some extent,this indicated that the rapid oxidation reaction of fatty acids to provide energy may be the reason for the rapid growth of large yellow croaker.In conclusion,fish-fed diet with 50%CO increased the growth rate and antioxidant capacity.Therefore,the optimal replacement level of CO to FO in the diet should be 50%.
文摘Analysis of Volatile Organic Compounds (VOCs) in crude coconut and petroleum oils from Nigeria is reported. Using head-space gas chromatography with a flame ionization detector and mass spectrometer, 8 VOCs were found in crude coconut oil and 29 VOCs were identified in crude petroleum oil. Crude coconut oil contained two aromatic, two nitrogenated, and four oxygenated compounds. Alkane, alkene, alkyne, halogenated, and sulfur compounds were absent in crude coconut oil but not in crude petroleum oil. The same observation held true for naphthalene. Conversely, benzofuran was absent in crude petroleum oil but was present in crude coconut oil at a concentration of 1.38 part-per-billion (ppb). The most concentrated VOC in crude coconut oil was dodecanoic acid at 9.98 ppb and that of crude petroleum oil was toluene at 12.61 ppb. Total VOC concentrations in crude coconut and petroleum oils are 20.49 and 87.46 ppb, respectively. These results are helpful in characterizing the chemical signature of Nigerian crude coconut oil for potential forensics use or in biofuel research.