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Tytuł:
A novel biobased polyester plasticizer prepared from palm oil and its plasticizing effect on poly (vinyl chloride)
Autorzy:
Jia, P.
Zhang, M.
Hu, L.
Zhou, Y.
Powiązania:
https://bibliotekanauki.pl/articles/779512.pdf
Data publikacji:
2016
Wydawca:
Zachodniopomorski Uniwersytet Technologiczny w Szczecinie. Wydawnictwo Uczelniane ZUT w Szczecinie
Tematy:
palm oil
polyester
plasticizer
polyvinyl chloride
blend
Opis:
In this study, palm oil was the first time to convert into a novel polyester plasticizer for polyvinyl chloride (PVC). In the first stage, palm oil was converted into palm oil monoglyceride (POM) by alcoholysis with glycerol. Next, a novel palm oil monoglycerides based polyester plasticizer (POMP) was synthesized from POM and maleic anhydride through esterification and condensation reaction. The structure of POMP was characterized with FTIR, 1H NMR and GPC. Then PVC blends were prepared using POMP as a plasticizer, melting behavior, thermal property, compatibility, mechanical properties and mechanism of plasticization of PVC blends were systematically studied. Melting behavior indicated that POMP could decrease the torque and the melt viscosity of PVC blends that was conducive to process. With the content of POMP increasing from 5 g to 15 g in PVC blends, the plasticized PVC blends demonstrated better compatibility, the degradation temperature (Td) increased from 252.6°C to 257.0°C, the glass transition temperature (Tg) decreased from 55°C to 49.5°C. Plasticization was put into effect by interaction of the electron cloud between the PVC chain and POMP molecule. This study may lead to the development of new type of PVC plasticizer based on vegetable oil.
Źródło:
Polish Journal of Chemical Technology; 2016, 18, 1; 9-14
1509-8117
1899-4741
Pojawia się w:
Polish Journal of Chemical Technology
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
A Review on Adsorption of Heavy Metals from Wood-Industrial Wastewater by Oil Palm Waste
Autorzy:
Ayob, Syafiqa
Othman, Norzila
Altowayti, Wahid Ali Hamood
Khalid, Faisal Sheikh
Bakar, Norshila Abu
Tahir, Muhammad
Soedjono, Eddy Setiadi
Powiązania:
https://bibliotekanauki.pl/articles/1839174.pdf
Data publikacji:
2021
Wydawca:
Polskie Towarzystwo Inżynierii Ekologicznej
Tematy:
industrial wastewater
heavy metal
adsorption
activated carbon
oil palm waste
Opis:
The use of heavy metals in the manufacturing industry over the past few decades has eventually contributed to a rise in the flow of metallic compounds into wastewater and has raised significant ecological and health threats to living things. Adsorption is an excellent way to treat solid waste effluent, offering significant benefits such as affordability, profitability, ease of operation and efficiency. However, the price of commercial adsorbent namely activated carbon has soared due to its high demand. There is also a green improvement in this method by turning the commercial adsorbent into agricultural waste. In Malaysia, the oil palm waste is such suitable material that can be utilized for making activated carbon, since they are ample and easy to find. Additionally, part of them is agricultural waste that cannot be consumed (i.e. leaves and fronds). Hence, this study aimed to analyse the potential of activated carbon from agricultural waste, namely oil palm waste, in reducing the levels of heavy metals in industrial wastewater.
Źródło:
Journal of Ecological Engineering; 2021, 22, 3; 249-265
2299-8993
Pojawia się w:
Journal of Ecological Engineering
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Adsorptive removal of colour pigment from palm oil using acid activated nteje clay. Kinetics, equilibrium and thermodynamics
Autorzy:
Ajemba, R. O.
Onukwuli, O. D.
Powiązania:
https://bibliotekanauki.pl/articles/110649.pdf
Data publikacji:
2013
Wydawca:
Politechnika Wrocławska. Oficyna Wydawnicza Politechniki Wrocławskiej
Tematy:
adsorption
kinetics
isotherm
activation
colour pigment
palm oil
bleaching
Opis:
The kinetics of colour pigment removal from palm oil using acid activated clay from Nteje has been investigated. To determine the equilibrium adsorption capacity, the effects of temperature, contact time, adsorbent dosage and particle size were studied. The experimental adsorption data were analyzed using pseudo-first order, pseudo-second order, and Elovich kinetic models. The pseudo-second order model fitted very well to the kinetic experimental data. Equilibrium isotherms were analyzed by Lang-muir and Freundlich adsorption models. The data was in line with the Freundlich isotherm indicating a monolayer adsorption. The activation energy was calculated as 12 kJ/mol, and other thermodynamic parameters were determined as ΔS° = 0.063 J/mol, ΔH° = –34.994 J/mol, and ΔG° = –58.606 kJ/mol. These values indicate that the adsorption of colour pigment from palm oil onto acid activated clay was exothermic and can be attributed to physico-chemical adsorption process.
Źródło:
Physicochemical Problems of Mineral Processing; 2013, 49, 1; 369-381
1643-1049
2084-4735
Pojawia się w:
Physicochemical Problems of Mineral Processing
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Advantages of knowledge management and supply chain integration. A case study of Thai palm oil production
Autorzy:
Phengchan, P.
Thangpreecharparnich, P.
Powiązania:
https://bibliotekanauki.pl/articles/407211.pdf
Data publikacji:
2018
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
knowledge management process
supply chain integration
competitive advantage
palm oil
Opis:
The objectives of this research are to study the direct influence on the competitive advantage and pattern development of variables affecting the competitive advantage of the Thai oil palm industry. This research employs a quantitative research method. The population for the study consists of 150 oil palm industrial operators in Thailand. Questionnaires are used in the data collection and the data are analyzed by using SEM. The research results reveal that the Knowledge Management Process and Supply Chain Integration positively influence the competitive advantage in the quality, delivery, and cost. The competitive advantage receives a positive direct impact from the Knowledge Management Process and Supply Chain Integration. The variation of competitive advantage can be explained as 84%. The obtained results can be used for developing the industry to create economic growth and sustainable competitive advantage.
Źródło:
Management and Production Engineering Review; 2018, 9, 4; 150-160
2080-8208
2082-1344
Pojawia się w:
Management and Production Engineering Review
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
An empirical analysis of Malaysian palm oil export to world main palm oil importing countries : evidence from a panel cointegration model
Autorzy:
Hassan, Nur Ain Mohd
Zakaria, Kalsom
Salleh, Kamalrudin Mohamed
Ahmad, Siti Mashani
Powiązania:
https://bibliotekanauki.pl/articles/2204095.pdf
Data publikacji:
2023
Wydawca:
Politechnika Wrocławska. Oficyna Wydawnicza Politechniki Wrocławskiej
Tematy:
panel cointegration
FMOLS
palm oil export
Granger causality
Opis:
The paper explores the long-term causal relationships of Malaysian palm oil exports with the real effective exchange rate of the respective importing countries, palm oil consumption, vegetable oil production, and GDP growth. The study applied panel cointegration and causality approaches based on data from 10 main palm oil importing countries between 2004 and 2018. The impacts of economic growth, the effective real exchange rate, and the production of other vegetable oils by the main palm oil importing countries on Malaysian palm oil exports were found to be negative. However, palm oil consumption by the main palm oil importers was found to be a statistically significant positive determinant of Malaysian palm oil exports. This finding indicates that consumption has a direct positive effect on the demand for exports. A panel Granger causality analysis revealed a unidirectional causality between importing countries’ production of other vegetable oils and Malaysian exports of palm oil.
Źródło:
Operations Research and Decisions; 2023, 33, 1; 61--73
2081-8858
2391-6060
Pojawia się w:
Operations Research and Decisions
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Analysis of green activities impact on purchase intention
Analiza wpływu zielonej działalności na zamówienie zakupu
Autorzy:
Dwikuncoro, R. Anang
Ratajczak, Sabina
Powiązania:
https://bibliotekanauki.pl/articles/404831.pdf
Data publikacji:
2019
Wydawca:
Politechnika Częstochowska
Tematy:
green product quality
green trust
green satisfaction
palm oil
Indonesia
jakość ekologicznego produktu
zielone zaufanie
zielona satysfakcja
olej palmowy
Indonezja
Opis:
The main objective of the present research is to explore the impact of green satisfaction, green product quality, green trust on purchase intention of the customers. Moreover, the moderating role of pricing of the product and mediating role of customer attitude between independent variables and dependent variables is examined as well. The survey data is employed in the present study and data is gathered from the palm oil customers in the form of questionnaires. For the analysis of the data, SEM (Structural equation modelling) is used. The results of the study revealed that there exists significant relationship among the mentioned relationships. But the green trust is not important to develop intentions among the customers. The findings of the study are important for the academicians of the marketing and strategy makers of the palm oil sector of Indonesia.
Głównym celem obecnych badań jest zbadanie wpływu zielonej satysfakcji, jakości zielonego produktu, zielonego zaufania na zamiary zakupowe klientów. Ponadto badana jest również moderująca rola wyceny produktu i mediacyjna rola postawy klienta między zmiennymi niezależnymi i zmiennymi zależnymi. Dane z ankiety są wykorzystywane w niniejszym badaniu, a dane są zbierane od klientów oleju palmowego w formie kwestionariuszy. Do analizy danych stosuje się SEM (modelowanie równań strukturalnych). Wyniki badania ujawniły, że istnieje znaczący związek między wymienionymi związkami. Ale zielone zaufanie nie jest ważne dla rozwijania intencji wśród klientów. Wyniki badań są ważne dla naukowców zajmujących się marketingiem i opracowywaniem strategii w sektorze oleju palmowego w Indonezji.
Źródło:
Polish Journal of Management Studies; 2019, 20, 1; 159-167
2081-7452
Pojawia się w:
Polish Journal of Management Studies
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Assessment of the effluent polishing plant using a ultrafiltration membrane installed at a palm oil mill
Autorzy:
Abdul Hadi, Numan
Hawari, Yahaya
Ngatiman, Muzzammil
Jalani, Nor Faizah
Wahab, Noorshamsiana Abdul
Halim, Rohaya Mohamed
Powiązania:
https://bibliotekanauki.pl/articles/208299.pdf
Data publikacji:
2019
Wydawca:
Politechnika Wrocławska. Oficyna Wydawnicza Politechniki Wrocławskiej
Tematy:
BOD
palm oil mill
wastewater treatment
ultrafiltration membranes
BZT
olej palmowy
oczyszczanie ścieków
membrany ultrafiltracyjne
Opis:
Palm oil mills discharge raw effluent with high biochemical oxygen demand (BOD) of about 25 000 mg O2/dm3 . Conventional effluent treatment system uses ponds with a long hydraulic retention time of about 55–85 days, but the reduction of BOD is usually halted at 100–250 mg O2/dm 3. Further reduction of BOD to below 20 mg O2/dm3 to meet regulation requirement needs further advanced treatment. This study evaluates the efficiency of an effluent polishing plant installed at a palm oil mill targeting final effluent BOD below 20 mg O2/dm3. Characteristic of the incoming and treated effluent, dissolved oxygen in the aeration ponds and the effluent flow rate of the treatment plant have been determined. Due to low process throughput at the mill, the polishing plant operated at only 60% of its designed capacity. Treatment of effluent showed reduction of BOD from 39.3±5.8 to 6.1±3.8 mg O2/dm3, i.e., a reduction by 80–94%. Colour – a newly proposed regulation parameter – was reduced from 1081±69 to 845±60 ADMI, i.e., by 11–30%. This study indicates that while the treatment of effluent to reduce the BOD to below 20 O2/dm3 O2/dm3 is feasible, reduction of colour to less than 100 ADMI is not achievable.
Źródło:
Environment Protection Engineering; 2019, 45, 1; 155-170
0324-8828
Pojawia się w:
Environment Protection Engineering
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Automatic non-destructive quality inspection system for oil palm fruits
Autorzy:
Makky, M.
Soni, P.
Salokhe, V.M.
Powiązania:
https://bibliotekanauki.pl/articles/24184.pdf
Data publikacji:
2014
Wydawca:
Polska Akademia Nauk. Instytut Agrofizyki PAN
Tematy:
non-destructive quality
inspection system
fruit
African oil palm
quality inspection
fresh fruit
bunch
machine vision
Opis:
In this research a non-destructive, rapid and cost effective examination machine for the estimation of the ripeness fraction, oil content and free fatty acid level in oil palm fresh fruits bunch was developed. The automatic machine-vision based in- spection system provided consistency, rapid estimation and accep- table accuracy results in non-dest ructive manner. Fresh fruits bunch samples from Tenera cultivar (7 to 20 years trees) were taken from Cimulang plantation, Bogor, Indonesia. Two statistical analysis methods were used: a forward stepwise multiple linear regression analysis and a multilayer-perceptron artificial neural network analysis. The best prediction of ripeness and oil content models were obtained using the latter method, while the best free fatty acid prediction model was developed by the first method. The models were then employed in the machine-vision inspection systems of the machine. The system best prediction accuracy of ripeness, oil content and free fatty acid models was 93.5, 96.41, and 89.32%, with standard error of prediction being 0.065, 0.044 and 0.068, respectively. The system was tested through a series of field tests, and successfully examined more than 12 t of fruits bunch per hour, without causing damage.
Źródło:
International Agrophysics; 2014, 28, 3
0236-8722
Pojawia się w:
International Agrophysics
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Biodiesel Production from Crude Palm Oil Using Kapok Skin KOH (Ceiba Pentandra) Catalyst as Solid Green Catalyst
Autorzy:
Jalaluddin
Ginting, Zainuddin
Maliki, Syariful
Setiawan, Arif
Zulfa
Powiązania:
https://bibliotekanauki.pl/articles/2086431.pdf
Data publikacji:
2022
Wydawca:
Polskie Towarzystwo Inżynierii Ekologicznej
Tematy:
biodiesel
crude palm oil
high purity
Ceiba Pentandra
THF
tetrahydrofuran
Opis:
Biodiesel is one type of renewable alternative energy that has great potential to be developed. Biodiesel is a fuel consisting of a mixture of mono-alkyl esters of long-chain fatty acids made from renewable sources, such as vegetable oils or animal fats, one of which is crude palm oil (CPO). Crude palm oil contains free fatty acids in high levels, so treatment is needed to reduce free fatty acids by a reaction known as the esterification reaction. Then, the transesterification process is carried out to produce biodiesel (methyl ester). The purpose of this study was to analyze the effect of catalyst mass, a mole ratio of CPO to moles of methanol and the effect of adding THF co-solvent to biodiesel purity. The catalyst used is a heterogeneous catalyst from kapok fruit peel waste. Kapok fruit rind was calcined at 700°C for 8 hours. The independent variable varied the mole ratio of oil to methanol in a 1:4 ratio; 1:6; 1:8; and 1:10 with a catalyst weight variation of 3 and 4%. Meanwhile, for the addition of co-solvent, variations of THF: methanol v/v 1:1 and 2:1, were carried out. The biodiesel properties such as density, viscosity, water content and acid number, were evaluated and compared with the Indonesian National Standard. The results showed that the transesterification reaction with the addition of co-solvent resulted in a higher methyl ester content than that without the addition of co-solvent. The highest yield of methyl ester without the addition of co-solvent was 79.16%, while the yield of the methyl ester with the addition of THF co-solvent with a ratio of 1:1 and 2:1 v/v to methanol was 90.09 and 94.09%, respectively. The highest methyl ester content (94.09%) was achieved by the addition of THF: methanol = 2:1, CPO: methanol molar ratio = 1:6 and 4 wt% catalyst weight. The results obtained in this study indicate that a green catalyst made from kapok skin can be used to produce biodiesel and also the addition of co-solvent can increase the yield of methyl esters, so that high purity is obtained.
Źródło:
Journal of Ecological Engineering; 2022, 23, 5; 286--292
2299-8993
Pojawia się w:
Journal of Ecological Engineering
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Biodiesel w UE i Polsce - obecne uwarunkowania i perspektywy
Biodiesel in the EU and in Poland - present conditions and the prospects for future
Autorzy:
Roszkowski, A.
Powiązania:
https://bibliotekanauki.pl/articles/239838.pdf
Data publikacji:
2012
Wydawca:
Instytut Technologiczno-Przyrodniczy
Tematy:
biodiesel
rzepak
olej palmowy
generacja substratów
transestryfikacja
BTL
HVO
fermentacja beztlenowa
właściwości paliw
osady ściekowe
oilseed rape
palm oil
substrate generations
transesterification
anaerobic digestion
fuel's characteristics
sewage sludges
Opis:
W pracy przedstawiono obecne i wzrastające znaczenie paliw do silników wysokoprężnych w bilansach paliw transportowych (płynnych) UE oraz opisano rolę i udział biodiesla wytwarzanego z biomasy. Omówiono wprowadzane obecnie zmiany w obowiązujących przepisach prawnych EU i USA, istotnie ograniczające produkcję biodiesla z użyciem dotychczasowych technologii. Opisano wyniki analiz wpływu zmian obszarowych (ILUC) i środowiskowych na uprawy roślinne, będące dotychczas podstawowymi surowcami do produkcji biodiesla metodami transestryfikacji. Omówiono i oceniono przydatność obecnych surowców do wytwarzania biodiesla z uwzględnieniem trzech generacji substratów. Wskazano na wpływ wprowadzanych przepisów na utrudnienia handlowe tak biodieslem, jak i surowcami oraz substratami do jego wytwarzania. Opisano ograniczenia w wykorzystaniu innych pożądanych substratów - tłuszczów zwierzęcych i mikroalg - oraz utrudnienia wynikające z odmiennych interpretacji przepisów o zastosowaniu osadów ściekowych jako biomasy. Przedstawiono ocenę stanu i perspektyw dotychczasowych i przyszłościowych technologii produkcji biodiesla, ze szczególnym uwzględnieniem rzepaku, jako surowca o dotychczas dominującym znaczeniu w UE.
Paper presented actual and increasing importance of the fuels for diesel engines in transport (liquid) fuel balance of the EU; the role and share of biodiesel fuel production from biomass were also described. Introduced actually changes in legal regulations being in force in the EU and USA, significantly limiting diesel production with the use of hitherto applied technologies, were characterized. The results of analyses were given, as concerning the effect of spatial (ILUC) and environmental changes on the crops being till now basic raw materials to generate diesel by transesterification methods. Usability of actual raw materials to diesel production considering three substrate generations, were discussed and evaluated. The effect of regulations being introduced on the commercial difficulties with biodiesel, as well as with the raw materials and substrates to its production, were indicated. Restrictions in utilization of other desirable substrates - the animal fats and micro-algae - as well as impediments resulted from different interpretation of regulations on the use of sewage sludge as biomass - were described. The status and prospects for hitherto existing and the future technologies of biodiesel production were presented, with particular attention put on the oilseed rape as a raw material of dominating, until now, importance in the EU.
Źródło:
Problemy Inżynierii Rolniczej; 2012, R. 20, nr 3, 3; 65-78
1231-0093
Pojawia się w:
Problemy Inżynierii Rolniczej
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Characterization and feasibility of biomass fuel pellets made of Colombian timber, coconut and oil palm residues regarding European standards
Autorzy:
Forero Núnez, C. A.
Jochum, J.
Sierra Vargas, F. E.
Powiązania:
https://bibliotekanauki.pl/articles/363258.pdf
Data publikacji:
2012
Wydawca:
Uniwersytet Warmińsko-Mazurski w Olsztynie
Tematy:
biomass
coconut shells
oil palm shells
pellets
renewable energy
biomasa
energia odnawialna
orzech kokosowy
palma olejowa
skorupa
owoc
Opis:
Strong correlation between economic development, energy demand and fossil fuels utilization during last decades has caused some negative impacts worldwide, based on it, the renewable resources for energy production should be employed to mitigate these effects. Nowadays, biomass is one of the most prominent renewable sources, but factors such as low density and high moisture content are some drawbacks. In order to overcome these problems, some companies use different types of biomass to provide solid biofuels with higher energy density, mechanical resistance and standardized dimensions. Wood pellet industry has increased exponentially during last years, faster than timber industries; therefore, new raw materials should be evaluated to guarantee pellets demand in the near future. Some of them are agricultural residues. Colombia is a country with an interesting potential for biomass production because there is a rising generation of agricultural products. This work aims to assess main properties of Colombian timber industry residues, coconut shells and oil palm shells and compare the characteristics of pellets made from these raw materials with European standards. Pellets made from these feedstocks have an average density between 850 and 1025kg·m-3, low ash contents and heating values around 18000kJ·kg-1. Coconut shell pellets have low compression ratios and problems during pretreatment; whereas, sawdust, wood shavings and oil palm shell pellets proved to be an attractive opportunity for pellet industry development in Colombia.
Źródło:
Environmental Biotechnology; 2012, 8, 2; 67-76
1734-4964
Pojawia się w:
Environmental Biotechnology
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Development of variable rate sprayer for oil palm plantation
Autorzy:
Ishak, W.
Hudzari, R.
Ridzuan, M.
Powiązania:
https://bibliotekanauki.pl/articles/200163.pdf
Data publikacji:
2011
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
smart sprayer
variable rate
camera vision
weedicide
oil palm
Opis:
This project describes the design and development of a camera vision with color detection for the variable rate technology (VRT) automated sprayer. In this project, the smart sprayer system was already developed and mounted on the ATV. The automated sprayer system was developed by combination of the electromechanical system, PC parallel port relay board, the controller and visual basic programming software. This smart sprayer system is guided with the camera to detect the presence of weeds. Detection of weeds is based on the green color value from RGB value. The amount or percentage (%) of weeds detected determines the rate of spraying that is controlled by an electric motor and the relay board. In this project, the spray nozzles were modified to be fully open, fully closed and half open. The closing and opening of valves were controlled by the electromechanical system that receives the instruction from the camera vision. Experiments carried out shows that the nozzle is closed when the percentage of weeds detected is less than 2%. It is half open at 3% to 50% and fully open at more than 51%. The application rate of spraying can be determined from the result of the spraying operation.
Źródło:
Bulletin of the Polish Academy of Sciences. Technical Sciences; 2011, 59, 3; 299-302
0239-7528
Pojawia się w:
Bulletin of the Polish Academy of Sciences. Technical Sciences
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Development of zero trans baking shortenings by enzymatic interesterification
Otrzymywanie szorteningów piekarskich zero trans metodą przeestryfikowania enzymatycznego
Autorzy:
Gruczynska, E.
Majewska, E.
Tarnowska, K.
Powiązania:
https://bibliotekanauki.pl/articles/801217.pdf
Data publikacji:
2018
Wydawca:
Szkoła Główna Gospodarstwa Wiejskiego w Warszawie. Wydawnictwo Szkoły Głównej Gospodarstwa Wiejskiego w Warszawie
Tematy:
canola oil
palm stearin
trans isomer
baking shortening
enzymatic interesterification
human diet
trans fatty acid
Opis:
For development of zero trans baking shortenings enzymatic interesterification was applied. Both immobilized (Novozym 435, Lipozyme RM IM, Lipase PS “Amano” IM) and native (Lipase A “Amano” 12, Lipomod TM 34P) enzymes were applied as biocatalysts. Palm stearin was explored as a source of palmitic acid. The immobilized enzymes formed new asymmetric triacylglycerols containing palmitic acid. The interesterification process produced the zero trans fats with the solid fat content profiles closely matching those of the commercial baking shortening. Not only did the novel structured lipids have comparable physical properties with the commercial baking shortening, but also offered additional health benefits. Thus enzymatic interesterification with immobilized lipases offered great potential in production of fats with expected properties.
Szorteningi piekarskie zero trans otrzymywano metodą przeestryfikowania enzymatycznego. Katalizatorami reakcji były zarówno enzymy immobilizowane (Novozym 435, Lipozyme RM IM, Lipase PS “Amano” IM), jak i natywne (Lipase A “Amano” 12, Lipomod TM 34P). Źródłem kwasu palmitynowego była stearyna palmowa. W lipidach strukturyzowanych powstających w obecności lipaz immobilizowanych występowały nowe niesymetryczne triacyloglicerole zawierające w cząsteczkach kwas palmitynowy. W wyniku przeestryfikowania otrzymano nowe tłuszcze zero trans o profilach zawartości fazy stałej zbliżonych do handlowego szorteningu piekarskiego przygotowanego z dodatkiem tłuszczów częściowo uwodornionych. Otrzymane tłuszcze miały nie tylko właściwości fizyczne i chemiczne zbliżone do handlowego szorteningu piekarskiego, ale również oferowały dodatkowe korzyści zdrowotne. Przeestryfikowanie enzymatyczne z wykorzystaniem enzymów immobilizowanych może zatem stanowić potencjalną metodę otrzymywania tłuszczów o programowanych właściwościach.
Źródło:
Zeszyty Problemowe Postępów Nauk Rolniczych; 2018, 592
0084-5477
Pojawia się w:
Zeszyty Problemowe Postępów Nauk Rolniczych
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Effect of chemical treatments on the properties of oil palm petiole fiber composites
Autorzy:
Nneka, Ejikeugwu L.
Wadzani, Gadzama S.
Chistian, Asadu O.
Chiamaka, Otisi B.
Powiązania:
https://bibliotekanauki.pl/articles/1193486.pdf
Data publikacji:
2021
Wydawca:
Przedsiębiorstwo Wydawnictw Naukowych Darwin / Scientific Publishing House DARWIN
Tematy:
High density polyethylene
Oil palm petiole fiber (OPPF)
acetic anhydride
chemical composition
potassium chlorate
sodium hydroxide
tensile strength
zinc chloride
Opis:
The effect of chemical treatments with acetic anhydride, potassium chlorate, sodium hydroxide and zinc chloride on the properties of Oil Palm Petiole Fiber composites was studied. The untreated and chemically treated Oil Palm Petiole Fiber (OPPF) was used in fabricating natural fiber/HDPE composites using injection molding machine. The chemical treatments on OPPF enhanced its chemical compositions and morphology. It was observed that the cellulose content at the peak for different treatment are 58.4%, 56.7%, 55.2% and 51.5% at 4wt% concentration for NaOH, KClO3, C4H6O3 and ZnCl respectively. The composites produced with chemically treated fibers performed better than the untreated one. The highest tensile strength of 44.2 Mpa, 39.1 Mpa, 35.6 Mpa, 31.2 Mpa and 25.5 Mpa was obtained at fiber content of 29 wt% for OPPF treated with NaOH, KClO3, C4H6O3, ZnCl and untreated OPPF respectively. Water absorbed by the untreated fiber was high compared to the chemically treated fiber. The chemical treatment created a better interfacial bonding and could be responsible for the improved mechanical properties.
Źródło:
World Scientific News; 2021, 158; 247-266
2392-2192
Pojawia się w:
World Scientific News
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Feasibility study of palm oil boiler ash (POBA) as a partial replacement of sand in foamed concrete
Autorzy:
Mohamed Yousuff, Mohamed Khatif Tawaf
Sharipudin, Siti Shahidah
Mohammad, Shahrul Nizam
Roslan, Azmi
Michael, Zeno
Shahrul Azhar, Ilya Izyan
Zainal Abidin, Nurrul Amilin
Powiązania:
https://bibliotekanauki.pl/articles/35547210.pdf
Data publikacji:
2022
Wydawca:
Szkoła Główna Gospodarstwa Wiejskiego w Warszawie. Wydawnictwo Szkoły Głównej Gospodarstwa Wiejskiego w Warszawie
Tematy:
foamed concrete
compressive strength
water absorption
sand replacement
palm oil boiler ash
POBA
Opis:
A study was conducted to explore the effect of palm oil boiler ash (POBA) on foamed concrete by varying the percentage of POBA over sand quantities (0, 4, 8 and 12%). This paper primarily discusses the water absorption test, uniaxial compressive strength, and dry density findings. It indicates that substituting sand with POBA greatly enhances the strength of foamed concrete. When the quantity of POBA was raised up to 12% throughout all curing times, the compressive strength steadily increased in the range of 4.34–13.50 N·mm–2. Furthermore, the dry density of foamed concrete was shown to be directly related to the fraction of POBA in the mixture. The dry density of foamed concrete increases as the amount of POBA increases. Despite this, water absorption shown that increasing POBA increases water absorption percentage in foamed concrete from 7.4 to 10.4%. This is due to the fact that a composition with a high POBA percentage will generate more pores than a mixture with a low POBA percentage.
Źródło:
Scientific Review Engineering and Environmental Sciences; 2022, 31, 1; 3-13
1732-9353
Pojawia się w:
Scientific Review Engineering and Environmental Sciences
Dostawca treści:
Biblioteka Nauki
Artykuł
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