Pub Date : 2022-03-25DOI: 10.36348/sijcms.2022.v05i03.002
Unegbu Unegbu, C. C., Ajah Ajah, O. O., Nnaoma Nnaoma, I. E, J. Joseph, R. C.
The antioxidant potential of crude ethanolic as well as ethyl acetate and n-hexane soluble fractions of Jatropha tanjorensis which is widely used in indigenous system of medicinal for different purposes were studied. The antioxidant potential of extract different Fractions were evaluated using different in vitro antioxidant models which includes Ascorbic acid, Beta carotene, flavoniods, total phenols, ABTS, H202, FRAP and reducing power. The estimation of the crude extract showed ascorbic acid (93.51mg/kg), beta carotene (10.564mg/kg), flavoniods (7.88mg/kg), total phenols (64.03mg/kg), ABTS (64.21%), H2O2 (6.39%), FRAP (0.221µmol/ml) and Reducing power (2.913µmol/ml). That of ethyl acetate fraction and n-hexane fractions for Ascorbic acid, beta carotene, flavoniods, Total phenols, ABTS, H202, FRAP and reducing power are as; 227.8mg/kg, 9.21mg/kg, 0.59mg/kg, 33.94mg/kg, 96.47%, 2.5%, 1.1911 µmol/ml, 4.500µmol/ml and 228.7mg/kg, 9.21mg/kg, 0.59mg/kg, 33.94mg/kg, 98.93%, 2.32%, 1.578µmol/ml, 4.456µmol/ml respectively. However, the result of this Study reveals the plant contains some appreciable amount of the antioxidant models analyzed which is vital to illnesses associated with oxidative stress thereby revealing that the plant is a good source of natural antioxidant.
{"title":"Evaluation of the antioxidative properties of different Fractions of Ethanol extract of Jatropha tangorensis","authors":"Unegbu Unegbu, C. C., Ajah Ajah, O. O., Nnaoma Nnaoma, I. E, J. Joseph, R. C.","doi":"10.36348/sijcms.2022.v05i03.002","DOIUrl":"https://doi.org/10.36348/sijcms.2022.v05i03.002","url":null,"abstract":"The antioxidant potential of crude ethanolic as well as ethyl acetate and n-hexane soluble fractions of Jatropha tanjorensis which is widely used in indigenous system of medicinal for different purposes were studied. The antioxidant potential of extract different Fractions were evaluated using different in vitro antioxidant models which includes Ascorbic acid, Beta carotene, flavoniods, total phenols, ABTS, H202, FRAP and reducing power. The estimation of the crude extract showed ascorbic acid (93.51mg/kg), beta carotene (10.564mg/kg), flavoniods (7.88mg/kg), total phenols (64.03mg/kg), ABTS (64.21%), H2O2 (6.39%), FRAP (0.221µmol/ml) and Reducing power (2.913µmol/ml). That of ethyl acetate fraction and n-hexane fractions for Ascorbic acid, beta carotene, flavoniods, Total phenols, ABTS, H202, FRAP and reducing power are as; 227.8mg/kg, 9.21mg/kg, 0.59mg/kg, 33.94mg/kg, 96.47%, 2.5%, 1.1911 µmol/ml, 4.500µmol/ml and 228.7mg/kg, 9.21mg/kg, 0.59mg/kg, 33.94mg/kg, 98.93%, 2.32%, 1.578µmol/ml, 4.456µmol/ml respectively. However, the result of this Study reveals the plant contains some appreciable amount of the antioxidant models analyzed which is vital to illnesses associated with oxidative stress thereby revealing that the plant is a good source of natural antioxidant.","PeriodicalId":230897,"journal":{"name":"Scholars International Journal of Chemistry and Material Sciences","volume":"131 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-03-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"122915103","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2022-03-22DOI: 10.36348/sijcms.2022.v05i03.001
A. Adesina
Silver-conjugated magnetic iron oxide nanoparticles (Ag-MNPs) were successfully synthesized and characterized and its effect on certain bacteria was evaluated. The synthesized nanoparticles were tested against six isolates which include Serratia marcescens, Staphylococcus aureus, Escherichia coli, Enterobacter cloacae, Salmonella enterica and Acinetobacter baumannii. The result showed that antibacterial activity of the synthesized Ag-MNPs was found to be effective against Serratia marcescens and Staphylococcus aureus, while the compound was ineffective against some clinical bacterial isolates. The diameters of the zones of inhibition were found to be 20 mm and 27 mm for Serratia marcescens and Staphylococcus aureus, respectively. The Minimum Inhibitory Concentration (MIC) was 10 mg/ml for both organisms. Also, the Minimum Bactericidal Concentration MBC for the two organisms was found to be 20 mg/ml. Therefore, the synthesized compound has antibacterial activity and could be a reliable compound of choice for treating bacterial infections.
{"title":"Antibacterial Activity of Silver-Conjugated Magnetic Iron Oxide Nanoparticles","authors":"A. Adesina","doi":"10.36348/sijcms.2022.v05i03.001","DOIUrl":"https://doi.org/10.36348/sijcms.2022.v05i03.001","url":null,"abstract":"Silver-conjugated magnetic iron oxide nanoparticles (Ag-MNPs) were successfully synthesized and characterized and its effect on certain bacteria was evaluated. The synthesized nanoparticles were tested against six isolates which include Serratia marcescens, Staphylococcus aureus, Escherichia coli, Enterobacter cloacae, Salmonella enterica and Acinetobacter baumannii. The result showed that antibacterial activity of the synthesized Ag-MNPs was found to be effective against Serratia marcescens and Staphylococcus aureus, while the compound was ineffective against some clinical bacterial isolates. The diameters of the zones of inhibition were found to be 20 mm and 27 mm for Serratia marcescens and Staphylococcus aureus, respectively. The Minimum Inhibitory Concentration (MIC) was 10 mg/ml for both organisms. Also, the Minimum Bactericidal Concentration MBC for the two organisms was found to be 20 mg/ml. Therefore, the synthesized compound has antibacterial activity and could be a reliable compound of choice for treating bacterial infections.","PeriodicalId":230897,"journal":{"name":"Scholars International Journal of Chemistry and Material Sciences","volume":"14 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-03-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114165784","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2022-03-08DOI: 10.36348/sijcms.2022.v05i02.002
U. M., Pantami H. A, A. G., A. A
Tomatoes consumed in Gombe are contaminated with traces and heavy metals due to accumulation of these metals in soil that absorbed by crop plants, which is the most serious environmental problem with significant implications on human health. This study focused on the comparative studies on concentrations of carcinogenic and non- carcinogenic heavy metals analyzed based on WHO Permissible limits. Sample T1 Tomatoes showed mean concentrations in decreasing order of Zn = 0.094 ± 0.045 mg/kg followed by Mn = 0.0744 ± 0.0031 mg/kg then Ni = 0.0394 ± 0.0014 mg/kg, Fe = 0.0163 ± 0.00113 mg/kg, Cd = 0.0063 ± 0.00106 mg/kg, Pb = 0.0031 ± 0.0062 mg/kg, Co = 0.00152 ± 0.00126 mg/kg, As = 0 respectively. Sample T2 showed mean concentrations of heavy metals with the highest of Ni = 0.2095 ± 0.27 mg/kg followed by Zn = 0.1761 ± 0.134 mg/kg, Mn = 0.0487 ± 0.0023 mg/kg, Fe = 0.0233 ± 0.00195 mg/kg, Cd = 0.0147 ± mg/kg, Pb = 0.0047 ± 0.0062 mg/kg, Co = 0.0075 ± 0.0065 mg/kg respectively with few above WHO limits of 0.002 – 0.005mg/kg. Sample T3 Tomatoes showed mean concentrations with highest in decreasing order of Mn = 0.0829 ± 0.017 mg/kg followed by Ni = 0.0809 ± 0.00412 mg/kg, Zn = 0.0504 ± 0.0031 mg/kg, Co = 0.0225 ±0.00080 mg/kg, Cd = 0.0179 ± 0.00243 mg/kg, Fe = 0.0143 ± 0.00057 mg/kg. As = 0.0011 ± 0.000265 mg/kg, Pb = 0.0004 ± 0.000058 mg/kg respectively. Hazard Index (HI) of non-carcinogenic Heavy metals analyzed in Tomatoes samples showed highest hazard index in all the three pathways with Co = 3.64 E+ 00 followed by Pb = 2.71E+00 then Cd = 5.51E-01, Ni = 1.07E-02, Mn = 6.81E-03, As = 2.16E-03, Zn = 7.79E-04, while the lowest Hazard index was shown by Fe = 5.62E-05 indicating HI > 1 with adverse health risk in decreasing order of Co > Pb > Cd > Ni > Mn > As > Zn > Fe respectively. Cancer risk effects of carcinogenic heavy metals investigated through ingestion showed the highest cancer risk of Cd = 4.10E-05 followed by As = 3.23E-07 then Pb = 7.14E-06 with order of Cd > As > Pb > Co while cancer risk through inhalation showed the highest in Co = 1.27E-11 followed by Cd = 7.06E-12 then As = 4.76E-13, the lowest of Pb = 4.41E-14 with order of Co > Cd > As > Pb indicating that some heavy metals contaminated the tomatoes analyzed were projecting while hazard and cancer risk on human health will persisted on body systems at certain prolong time, examining of these heavy metals levels will safeguard public health.
{"title":"Impact and Health Risk Assessment of Heavy metals on Contaminated Tomatoes (Lycopersicum esculentum) Consumed in Gombe Metropolis","authors":"U. M., Pantami H. A, A. G., A. A","doi":"10.36348/sijcms.2022.v05i02.002","DOIUrl":"https://doi.org/10.36348/sijcms.2022.v05i02.002","url":null,"abstract":"Tomatoes consumed in Gombe are contaminated with traces and heavy metals due to accumulation of these metals in soil that absorbed by crop plants, which is the most serious environmental problem with significant implications on human health. This study focused on the comparative studies on concentrations of carcinogenic and non- carcinogenic heavy metals analyzed based on WHO Permissible limits. Sample T1 Tomatoes showed mean concentrations in decreasing order of Zn = 0.094 ± 0.045 mg/kg followed by Mn = 0.0744 ± 0.0031 mg/kg then Ni = 0.0394 ± 0.0014 mg/kg, Fe = 0.0163 ± 0.00113 mg/kg, Cd = 0.0063 ± 0.00106 mg/kg, Pb = 0.0031 ± 0.0062 mg/kg, Co = 0.00152 ± 0.00126 mg/kg, As = 0 respectively. Sample T2 showed mean concentrations of heavy metals with the highest of Ni = 0.2095 ± 0.27 mg/kg followed by Zn = 0.1761 ± 0.134 mg/kg, Mn = 0.0487 ± 0.0023 mg/kg, Fe = 0.0233 ± 0.00195 mg/kg, Cd = 0.0147 ± mg/kg, Pb = 0.0047 ± 0.0062 mg/kg, Co = 0.0075 ± 0.0065 mg/kg respectively with few above WHO limits of 0.002 – 0.005mg/kg. Sample T3 Tomatoes showed mean concentrations with highest in decreasing order of Mn = 0.0829 ± 0.017 mg/kg followed by Ni = 0.0809 ± 0.00412 mg/kg, Zn = 0.0504 ± 0.0031 mg/kg, Co = 0.0225 ±0.00080 mg/kg, Cd = 0.0179 ± 0.00243 mg/kg, Fe = 0.0143 ± 0.00057 mg/kg. As = 0.0011 ± 0.000265 mg/kg, Pb = 0.0004 ± 0.000058 mg/kg respectively. Hazard Index (HI) of non-carcinogenic Heavy metals analyzed in Tomatoes samples showed highest hazard index in all the three pathways with Co = 3.64 E+ 00 followed by Pb = 2.71E+00 then Cd = 5.51E-01, Ni = 1.07E-02, Mn = 6.81E-03, As = 2.16E-03, Zn = 7.79E-04, while the lowest Hazard index was shown by Fe = 5.62E-05 indicating HI > 1 with adverse health risk in decreasing order of Co > Pb > Cd > Ni > Mn > As > Zn > Fe respectively. Cancer risk effects of carcinogenic heavy metals investigated through ingestion showed the highest cancer risk of Cd = 4.10E-05 followed by As = 3.23E-07 then Pb = 7.14E-06 with order of Cd > As > Pb > Co while cancer risk through inhalation showed the highest in Co = 1.27E-11 followed by Cd = 7.06E-12 then As = 4.76E-13, the lowest of Pb = 4.41E-14 with order of Co > Cd > As > Pb indicating that some heavy metals contaminated the tomatoes analyzed were projecting while hazard and cancer risk on human health will persisted on body systems at certain prolong time, examining of these heavy metals levels will safeguard public health.","PeriodicalId":230897,"journal":{"name":"Scholars International Journal of Chemistry and Material Sciences","volume":"9 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-03-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"125922409","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2022-02-22DOI: 10.36348/sijcms.2022.v05i02.001
S. Mikailu, Afieroho Ozadheoghene Eriarie, K. Abo
The prevalence of diabetes mellitus is increasing worldwide. The objective is to investigate and characterize the alpha-amylase inhibition principles of the leaves of Ficus sur Forssk (Moraceae) used in ethnomedicine for management of diabetes mellitus. Powdered leaves were successively macerated with N-hexane, chloroform and 70% ethanol respectively for three consecutive days. The extracts were assessed for phytochemicals and inhibition of alpha-amylase. Alpha-amylase inhibition was assessed using porcine α-amylase. Bioactive n-hexane extract was fractionated on column chromatography packed with Silica Gel G (mesh 60-120) and eluted with gradient mixture of hexane, ethyl acetate and ethanol. Active fractions (F1 - F5) were purified on preparative thin layer chromatography. Active pure compounds were assessed for bioactivity and identified by spectroscopy (UV, IR, MS and NMR). The n-hexane extracts of the plant exhibited highest significant (p < 0.05) inhibition. Fraction F4 was the most active and was and compound FB was characterized from it as a novel abietane-type diterpene (4,7,10-b-trimethyl-benzofuro[c]-6,6-a,8,9,10,10-a-hexahydroisochromene-7-carboxylic acid) with 55% inhibition of alpha-amylase at 50µg/ml. This work reports for the first time a novel diterpenoid from Ficus sur with alpha-amylase inhibition activity.
{"title":"A Diterpene Isolated from Ficus sur Forssk (Moraceae) and it’s Alpha-Amylase Inhibition Activity","authors":"S. Mikailu, Afieroho Ozadheoghene Eriarie, K. Abo","doi":"10.36348/sijcms.2022.v05i02.001","DOIUrl":"https://doi.org/10.36348/sijcms.2022.v05i02.001","url":null,"abstract":"The prevalence of diabetes mellitus is increasing worldwide. The objective is to investigate and characterize the alpha-amylase inhibition principles of the leaves of Ficus sur Forssk (Moraceae) used in ethnomedicine for management of diabetes mellitus. Powdered leaves were successively macerated with N-hexane, chloroform and 70% ethanol respectively for three consecutive days. The extracts were assessed for phytochemicals and inhibition of alpha-amylase. Alpha-amylase inhibition was assessed using porcine α-amylase. Bioactive n-hexane extract was fractionated on column chromatography packed with Silica Gel G (mesh 60-120) and eluted with gradient mixture of hexane, ethyl acetate and ethanol. Active fractions (F1 - F5) were purified on preparative thin layer chromatography. Active pure compounds were assessed for bioactivity and identified by spectroscopy (UV, IR, MS and NMR). The n-hexane extracts of the plant exhibited highest significant (p < 0.05) inhibition. Fraction F4 was the most active and was and compound FB was characterized from it as a novel abietane-type diterpene (4,7,10-b-trimethyl-benzofuro[c]-6,6-a,8,9,10,10-a-hexahydroisochromene-7-carboxylic acid) with 55% inhibition of alpha-amylase at 50µg/ml. This work reports for the first time a novel diterpenoid from Ficus sur with alpha-amylase inhibition activity.","PeriodicalId":230897,"journal":{"name":"Scholars International Journal of Chemistry and Material Sciences","volume":"188 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-02-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"125933415","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
N-heterocyclic carbene boranes (NHC-boranes) are a new kind of compounds which have characteristic structures, luxuriant chemical properties, and preparation with a simple method. They can be widely utilized in various organic synthetic chemical reactions. As practical synthetic reagents or intermediates, it has now attracted attention. In order to show that the status of NHC-boranes in organic synthesis cannot be ignored, this article reviews the structural characteristics, preparation methods and typical chemical reactions of NHC-boranes. We hope that this review can attract more attention, promote the development of synthetic organic chemistry, and apply them to a wider range of areas.
n -杂环碳硼烷(nhc -硼烷)是一类结构独特、化学性质丰富、制备方法简单的新型化合物。它们可广泛应用于各种有机合成化学反应中。作为实用的合成试剂或中间体，现已引起人们的重视。为了说明nhc -硼烷在有机合成中的地位不容忽视，本文综述了nhc -硼烷的结构特点、制备方法和典型的化学反应。我们希望这篇综述能够引起更多的关注，促进合成有机化学的发展，并将其应用于更广泛的领域。
{"title":"Research Progress on N-heterocyclic Carbene Boranes","authors":"X. Wang, Yu-jie Yang, Yangyang Song, Shuang Zhao, Hong-jie Qu","doi":"10.36348/SIJCMS.2020.V03I10.002","DOIUrl":"https://doi.org/10.36348/SIJCMS.2020.V03I10.002","url":null,"abstract":"N-heterocyclic carbene boranes (NHC-boranes) are a new kind of compounds which have characteristic structures, luxuriant chemical properties, and preparation with a simple method. They can be widely utilized in various organic synthetic chemical reactions. As practical synthetic reagents or intermediates, it has now attracted attention. In order to show that the status of NHC-boranes in organic synthesis cannot be ignored, this article reviews the structural characteristics, preparation methods and typical chemical reactions of NHC-boranes. We hope that this review can attract more attention, promote the development of synthetic organic chemistry, and apply them to a wider range of areas.","PeriodicalId":230897,"journal":{"name":"Scholars International Journal of Chemistry and Material Sciences","volume":"44 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2020-12-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"115552333","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2019-10-31DOI: 10.36348/sijcms.2019.v02i06.002
A. B. Ahmed, Hamed Alqamoudy, A. Rashed, EL-Mahmoudy, Akram Almabrouk Misbah, Nadea Almunir, Manal M Elshili, M FadiaTaufik, Nouri Kushlaf
The interest in medicinal plants in all modern scientific research remains to discover many medicines and drugs to reduce incurable diseases. This study aimed at detecting the effective chemical compounds, flavonoids, tannins, alkaloids. In addition, the possibility of separating some of these compounds by TLC. The results obtained from this study have shown that most of these compounds are found. In addition to the ability of organic mobile phase to separate of these components where the values of Rf one to three spots .It indicates the difference in polarity and the composition of these compounds found in Okra under study.
{"title":"Phytochemical Screening of Okra plant from Libya","authors":"A. B. Ahmed, Hamed Alqamoudy, A. Rashed, EL-Mahmoudy, Akram Almabrouk Misbah, Nadea Almunir, Manal M Elshili, M FadiaTaufik, Nouri Kushlaf","doi":"10.36348/sijcms.2019.v02i06.002","DOIUrl":"https://doi.org/10.36348/sijcms.2019.v02i06.002","url":null,"abstract":"The interest in medicinal plants in all modern scientific research remains to discover many medicines and drugs to reduce incurable diseases. This study aimed at detecting the effective chemical compounds, flavonoids, tannins, alkaloids. In addition, the possibility of separating some of these compounds by TLC. The results obtained from this study have shown that most of these compounds are found. In addition to the ability of organic mobile phase to separate of these components where the values of Rf one to three spots .It indicates the difference in polarity and the composition of these compounds found in Okra under study.","PeriodicalId":230897,"journal":{"name":"Scholars International Journal of Chemistry and Material Sciences","volume":"64 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-10-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"126848255","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2019-10-31DOI: 10.36348/sijcms.2019.v02i06.003
Sukmawati, P. Lestari
Increased development in the industrial and transportation sectors today significantly increases the use of lubricants. This means that a significant amount of lubrication is needed to meet consumption needs in the industrial and transportation sectors. Palm Fatty Acid Destillate (PFAD) has a high enough potential to be used as a raw material for making oleochemical products, one of which is solid lubricant. This is caused by the composition of fatty acids contained in PFAD not much different from the composition of fatty acids found in palm oil. This study aims to determine the formulation of solid lubricants (grease) from PFAD and mixture metal soap (Al-Ca) as thickener which has characteristics close to SNI solid lubricants and know the quality of solid lubricants produced. The method used in the manufacture of solid grease (grease) consists of two stages. The first stage is the process of making mixed metal soap (Al-Ca) by mixing PFAD and Al(OH)3 Ca(OH)2 and analyzing the mixed metal soap. The second stage is the manufacture of solid lubricants (grease) from mixed metal soap (Al-Ca) and PFAD as well as analyzing the resulting product. Based on the research that has been done, the optimum solid lubricant obtained according to SNI standards is in the composition of A1: B1, A1 is the ratio of Al (OH)3 : Ca(OH)2 = 90% : 10% and B1 is the ratio of metal soap: PFAD = 10 % : 90%, so the density is 0.95 gr / ml and the penetration value is 194 (25C), the melting point is 97C and NLGI 4.
{"title":"Optimization the Ratio of Palm Fatty Acid Distillate (PFAD) and Mixed Metal Soap (Al-Ca) in the Manufacture of Biodegradable Solid Lubricants","authors":"Sukmawati, P. Lestari","doi":"10.36348/sijcms.2019.v02i06.003","DOIUrl":"https://doi.org/10.36348/sijcms.2019.v02i06.003","url":null,"abstract":"Increased development in the industrial and transportation sectors today significantly increases the use of lubricants. This means that a significant amount of lubrication is needed to meet consumption needs in the industrial and transportation sectors. Palm Fatty Acid Destillate (PFAD) has a high enough potential to be used as a raw material for making oleochemical products, one of which is solid lubricant. This is caused by the composition of fatty acids contained in PFAD not much different from the composition of fatty acids found in palm oil. This study aims to determine the formulation of solid lubricants (grease) from PFAD and mixture metal soap (Al-Ca) as thickener which has characteristics close to SNI solid lubricants and know the quality of solid lubricants produced. The method used in the manufacture of solid grease (grease) consists of two stages. The first stage is the process of making mixed metal soap (Al-Ca) by mixing PFAD and Al(OH)3 Ca(OH)2 and analyzing the mixed metal soap. The second stage is the manufacture of solid lubricants (grease) from mixed metal soap (Al-Ca) and PFAD as well as analyzing the resulting product. Based on the research that has been done, the optimum solid lubricant obtained according to SNI standards is in the composition of A1: B1, A1 is the ratio of Al (OH)3 : Ca(OH)2 = 90% : 10% and B1 is the ratio of metal soap: PFAD = 10 % : 90%, so the density is 0.95 gr / ml and the penetration value is 194 (25C), the melting point is 97C and NLGI 4.","PeriodicalId":230897,"journal":{"name":"Scholars International Journal of Chemistry and Material Sciences","volume":"18 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-10-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"122165311","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2019-10-31DOI: 10.36348/sijcms.2019.v02i06.001
P. ObukaNnaemekaS., J. AniNdubuisi, R. OziokoEmeka
Increasing interest in natural fibres for composite material formation and applications informs the aim of this paper on review of various surface modification methods employed towards the improvement of the Tribological properties of these fibres for interfacial bonding with polymer matrices. Natural fibres have wonderful properties ranging from accessibility, bi-degradability, recyclability, low density and many more but have particular negative characteristic that needs to be corrected in order to improve its surface interaction with composite matrices; which is their great affinity for water. Different methods of treating natural fibres have been applied towards reducing the hydrophilic nature of these fibres. These surface modification processes do not only reduce water absorption capability of these fibres but also increases fibrillation and material wettability. This review of literatures showed that mercerization treatment and acetylation treatment are the most applicable surface modifications or treatments for natural fibres.
{"title":"Improved Engineering Tribological Property of Natural Fibres by Surface Modifications: A Review","authors":"P. ObukaNnaemekaS., J. AniNdubuisi, R. OziokoEmeka","doi":"10.36348/sijcms.2019.v02i06.001","DOIUrl":"https://doi.org/10.36348/sijcms.2019.v02i06.001","url":null,"abstract":"Increasing interest in natural fibres for composite material formation and applications informs the aim of this paper on review of various surface modification methods employed towards the improvement of the Tribological properties of these fibres for interfacial bonding with polymer matrices. Natural fibres have wonderful properties ranging from accessibility, bi-degradability, recyclability, low density and many more but have particular negative characteristic that needs to be corrected in order to improve its surface interaction with composite matrices; which is their great affinity for water. Different methods of treating natural fibres have been applied towards reducing the hydrophilic nature of these fibres. These surface modification processes do not only reduce water absorption capability of these fibres but also increases fibrillation and material wettability. This review of literatures showed that mercerization treatment and acetylation treatment are the most applicable surface modifications or treatments for natural fibres.","PeriodicalId":230897,"journal":{"name":"Scholars International Journal of Chemistry and Material Sciences","volume":"42 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-10-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"131450709","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
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