The high beef price triggers adulteration of beef and other non-halal animal meat, such as wild boar and rats. An appropriate and effective analytical method is needed to differentiate halal and ...non-halal animal meat. The SPME/GC-MS method could authenticate meat based on specific volatile compounds in each meat. The objective of this study was to characterize volatile compounds and determine the volatile marker in raw beef, rat, wild boar meat, and their mixtures using SPME/GC-MS. The chemometrics of principal component analysis (PCA) and orthogonal projection to latent structure-discriminant analysis (OPLS-DA) classified raw beef, rat, wild boar, and their mixture. Correlation coefficients and VIP values were used to determine the volatile marker compounds for each meat in the OPLS-DA classes. The OPLS-DA results that the most robust marker in the beef class was dimethylfulvene, benzyl alcohol in the rat class, and 1,3,5-cycloheptatriene in the wild boar class. Furthermore, the most robust marker in the mixture of beef and rat class was benzaldehyde, 3-ethyl-, while 2,6-dimethyldecane was dominant in the mixture of beef and wild boar class. However, further study using larger number of samples which include commercial meat is required to confirm these results.
This study reports the optimization of the preparation of etoricoxib (ETX)-loaded low molecular weight of chitosan (LMWC) nanoparticles (ETX-LMWC-NPs) by ionic gelation method with sodium ...tripolyphosphate (TPP) as cross-linking agent. The independent variables (LMWC/TPP mass ratio, LMWC, and poloxamer 188 concentration) were formulated and optimized using response surface methodology (RSM) Box-Behnken design (BBD) with three levels for each factor. Size of particles, polydispersity index (PDI), and encapsulation efficiency was investigated as the dependent variable. ETX-LMWC-NPs were characterized by particle size analyzer, scanning electron microscope, UV-Vis spectrophotometry, and Fourier transforms infrared spectroscopy. The ETX-LMWC-NPs have an average particle size of 259.91 nm, a PDI of 0.041, and encapsulation efficiency of 51.25%. ETX-LMWC-NPs are spherical and have a spectrum at wavenumber 1656 cm-1 and 718 cm-1, respectively, indicating the presence of C=N and C-Cl originating from the ETX compound. The ETX release profile at pH 1.2 and 6.8 mediums approach the Korsmeyer-Peppas model. ETX released pH 1.2 did not differ significantly from free ETX with a maximum 10-12% release. ETX release at pH 6.8 had a maximum release of 21% and showed a 19% increase in dissolution rate than free ETX. The ETX-LMWC-CSNPs prepared by optimum formula (2.65 % LMWC, 5.5 LMWC/TPP mass ratio, and 1 mg/mL) showed stable monodispersity nanoparticles and easily soluble in water.
RESUMO: Este experimento relata a otimização da preparação de nanopartículas de quitosana de baixo peso molecular (LMWC) (ETX-LMWC-NPs) carregadas com etoricoxibe (ETX) pelo método de gelificação iônica com tripolifosfato de sódio (TPP) como agente de reticulação. As variáveis independentes (razão de massa LMWC / TPP, LMWC e concentração de poloxamer 188) foram formuladas e otimizadas usando metodologia de superfície de resposta (RSM) projeto Box-Behnken (BBD) com três níveis para cada fator. Tamanho das partículas, índice de polidispersidade (PDI) e eficiência de encapsulação foram investigados como a variável dependente. ETX-LMWC-NPs foram caracterizados por analisador de tamanho de partícula, microscópio eletrônico de varredura, espectrofotometria UV-Vis e espectroscopia de infravermelho com transformada de Fourier. Os ETX-LMWC-NPs têm um tamanho médio de partícula de 259,91 nm, um PDI de 0,041 e eficiência de encapsulação de 51,25%. ETX-LMWC-NPs são esféricos e apresentam um espectro no número de onda 1656 cm-1 e 718 cm-1, respectivamente, indicando a presença de C = N e C-Cl originários do composto ETX. O perfil de liberação de ETX em meios de pH 1,2 e 6,8 se aproxima do modelo Korsmeyer-Peppas. O ETX liberado em pH 1,2 não diferiu significativamente do ETX livre com uma liberação máxima de 10-12%. A liberação de ETX em pH 6,8 teve uma liberação máxima de 21% e mostrou um aumento de 19% na taxa de dissolução do que o ETX livre. Os ETX-LMWC-CSNPs preparados pela fórmula ótima (2,65% LMWC, 5,5 LMWC / razão de massa TPP e 1 mg / mL) mostraram nanopartículas de monodispersidade estáveis e facilmente solúveis em água.
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DOBA, IZUM, KILJ, NUK, PILJ, PNG, SAZU, SIK, UILJ, UKNU, UL, UM, UPUK
The manufacture of vibration damping material from natural rubber (NR) required an increase in dynamic properties, thermal stability, and resistance to heat. Using the Carbon Black N990 as a filler ...in NR vulcanizates can potentially increase on these properties. This research aims to study the effect of using Carbon Black N990 on dynamic properties, thermal stability, and aging resistance to heat in NR vulcanizates. The dynamic properties of NR vulcanizates were determined by Rubber Process Analyzer (RPA), while the thermal stability properties were studied by TGA, and heat resistance was determined by the thermal aging test. The RPA test results showed that adding 50 phr Carbon Black N990 in the NR compound could increase the value of the complex shear modulus to 65%. Furthermore, the results of the TGA test showed that the thermal stability properties of unfilled NR vulcanizates were better than that of NR vulcanizates containing Carbon Black N990. Unfilled NR vulcanizates were heat stable up to 353oC, while NR vulcanizates containing 15, 30, and 50 parts per hundred rubber (phr) Carbon Black N990, respectively, were heat stable up to 348.1oC, 348oC, and 349oC. Based on the requirements of ISO 4632-1, it showed that the NR compound containing Carbon Black N990 has good heat resistance properties. The NR compound formula contains 30 phr Carbon Black N990 showing good dynamic properties and heat resistance in accordance with EN 15129 requirements so that it has the potential to be used as a vibration damping material for earthquake-resistant structures.
The present study synthesized baked hydrogels by crosslinking reactions from the sugar palm starch and modified chitosan using citric acid as a crosslinker and potassium persulfate as the free ...radical initiator. Sugar palm starch was derived from the sugar palm (
Arenga pinnata
) plant, extracted from the stem when it no longer produces sugar and fruits. Baked hydrogels were characterized by their physical and chemical properties, including moisture content, water solubility, swelling capacity and contact angle. From the variation of the obtained baked hydrogels, the moisture contents varied around 11–15%, water solubility was in the range of 28–38%, and the degree of swelling was about 153–283%. In terms of contact angle measurement, the highest value was around 65°. The structure formation of chemical linkages among raw materials of the baked hydrogels was studied using Fourier transform infrared spectroscopy. The morphology was observed with scanning electron microscopy, showing the porosity in the structure. The thermal properties were marked using differential scanning calorimetry with a range of glass transition temperature of 47–60 °C and melting temperature from 190 to 203 °C. In their application as the removal of methylene blue as the targeted water contaminant, the baked hydrogels of HSC 3 can absorb methylene blue solution with the highest degradation percentage, reaching 63.10%. The adsorption capacity of the baked hydrogel, despite its simple preparation method, is relatively high. This is evidenced by its effective ability to adsorb contaminants, which can be attributed to its crosslinking formation. Based on the observed features and experimental outcomes at the laboratory scale, it can be affirmed that the utilization of sugar palm starch and modified chitosan in baked hydrogel exhibits potential for environmental applications pertaining to contamination removal.
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EMUNI, FIS, FZAB, GEOZS, GIS, IJS, IMTLJ, KILJ, KISLJ, MFDPS, NLZOH, NUK, OILJ, PNG, SAZU, SBCE, SBJE, SBMB, SBNM, UKNU, UL, UM, UPUK, VKSCE, ZAGLJ
•Natural zeolite (NZ), which is treated with desilication, is very effective in being used as catalyst support.•The smaller concentration of NaOH in the desilication process, the better the resulting ...characteristics.•The Ni/NZ0.5 catalyst revealed optimal catalytic activity with a liquid fraction and green diesel selectivity of 83.64% and 92.74%, respectively.
Natural zeolite (NZ) from desilication and activation was prepared to support the Ni catalyst. The catalyst was utilized for the hydrodeoxygenation (HDO) of the palm fatty acid distillate (PFAD) into green diesel. Desilication using sodium hydroxide (NaOH) solution increases the porosity, surface area, and acidity of the natural zeolite, thus increasing the catalytic activity. This study aims to determine the effect of the NaOH concentration utilized in the desilication process on the characteristics of support and catalytic activity of the Ni/NZ catalyst. Additionally, pure Ni and Ni/NZ without desilication were also investigated for comparison. NZ underwent desilication by varying the concentration of NaOH (0.5, 1, and 2 N). Desilicated zeolite was then activated using a 1 M ammonium acetate solution and impregnated with Ni metals. The desilication NZ increases the acidity and surface area at a low NaOH concentration, while the zeolite structure (clinoptilolite) is still intact. Therefore, the catalytic activity of the catalyst was also increased compared to Ni and Ni/NZ catalysts without desilication. Conversely, a higher concentration of NaOH decreases the Si/Al ratio, acidity, and surface area of support. As a result, the catalytic activity of the catalyst decreases, as evidenced by the reduced liquid product in the hydrodeoxygenation of PFAD. The Ni/NZ0.5 catalyst revealed optimal catalytic activity with a liquid fraction and green diesel selectivity of 83.64% and 92.74%, respectively.
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GEOZS, IJS, NUK, OILJ, SBJE, UL, UM, UPCLJ, UPUK, ZAGLJ, ZRSKP
Petroleum fuel is the primary source of energy today. Its use often causes environmental problems, one of them SOx gas emissions. Palm fatty acid distillate (PFAD) is a by-product of crude palm oil ...refining and has great promise to be developed as a renewable energy source. This research investigates the effect of Ni/P catalyst ratios impregnated by activated natural zeolite as solid support to properties and performance of hydrodeoxygenation (HDO) of PFAD to green diesel. The HDO reaction was performed by varying Ni/P at a temperature of 350 °C for 2 h, and 40 bar H2 pressure. The highest conversion and selectivity of PFAD to green diesel are obtained at a ratio of NiP(2:1)/NZ0.5 catalyst.
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GEOZS, IJS, IMTLJ, KILJ, KISLJ, NLZOH, NUK, OILJ, PNG, SAZU, SBCE, SBJE, UILJ, UL, UM, UPCLJ, UPUK, ZAGLJ, ZRSKP
•Preparation Sodium Silicate from Rice Husk to Synthesize Silica Nanoparticles by Sol-Gel Method.•Optimization synthesis of silica nanoparticles using variation Natrium Hydroxide (NaOH).•Application ...of Silica Nanoparticles Adsorption Water in Analysis of Methamphetamine.•Adsorption Isotherm and Kinetics of Adsorption Water in Analysis of Methamphetamine onto nanoparticle silica.
Numerous uses of silica nanoparticles include medication delivery, lightweight aggregates, and energy storage. This work synthesized SiO2NPs from rice husk (RH) by a sol-gel extraction method. Fourier transform infrared (FTIR), Raman spectroscopy, X-ray diffraction (XRD), X-ray fluorescence (XRF), and scanning electron microscopy (SEM) with energy-dispersive X-ray (EDS) were used to analyze the extracted SiO2NPs. XRD diffraction indicates SiO2NPs, and the Debye Scherrer particle size equation shows that the particle size ranges between 43 and 97 nm. SEM image shows the structure of produced exhibits an agglomeration propensity. XRF results confirm that Si and EDS results confirm that Si and O. FTIR and Raman spectra show Si-O-Si and Si-O bonds. The adsorption of methamphetamine consistent with the Langmuir isotherm with a maximum adsorption capacity of 333.3 mg/g. The kinetic adsorption of methamphetamine consistent with the pseudo-second-order kinetic.
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GEOZS, IJS, NUK, OILJ, SBJE, UL, UM, UPCLJ, UPUK, ZAGLJ, ZRSKP
Sansevieria trifasciata (mother-in-law's tongue), an ornamental plant widely found in Indonesia, can absorb electromagnetic radiation in various electronic devices. This study aims to find the best ...S. trifasciata extract as an electromagnetic and thermal radiation reducer emitted from a smartphone. S. trifasciata leaves were macerated using ethanol, acetone, and dichloromethane. The extract was mixed with PVA as a film and tested for electromagnetic radiation using a radiation measuring device type GM-3120. Thermal radiation was tested using a temperature sensor (PASCO CI-6505B) connected to a PASCO 550 Universal Interface. All smartphone protective films decreased radiation from the smartphone, and the acetone extract caused the most significant radiation decrease, with the best results at a concentration of 5%. An S. trifasciata extract contained alkaloids, saponins, steroids, phenolics, and tannins based on the phytochemical tests. Based on LC-MS data, the dominant compounds identified from the three extracts of S. trifasciata is a group of alkaloids, fatty acid, and steroid. The functional groups that are thought to play a role in reducing radiation are the C-O, C=O, and C-OH functional groups. A compound that is thought to contribute to the reduction in radiation is neuroscogenin, a steroid group.
The purpose of this research was to characterize the volatile compounds, texture, and color profile of meatballs made from beef, rat, wild boar, and their combinations. Volatile compounds were ...analyzed using SPME/GC-MS and multivariate data analysis (PCA, PLS-DA). Additionally, several textural features such as hardness, gumminess, chewiness, cohesiveness, and colour (L, a∗, b∗, C, and h) were also analyzed. The findings revealed that texture and color characteristics can only be used to differentiate meatballs based on their raw meat materials when meat adulterants are used in high concentrations (≥50%). PLS-DA analysis of volatile data revealed distinct groupings among various types of meatballs, including meatballs adulterated with rat or wild boar meat at the lowest percentage used in this study (20%). By using VIP and correlation coefficient, the strongest markers in beef, rat, and wild boar meatballs were identified as (Z)-2-amino-5-methyl-benzoic acid, 2-heptenal, and cyclobutanol, respectively. Nonanal was consistently found as a significant marker in the meatballs made from a mixture of beef-rat and beef-wild boar at different ratios. This study demonstrated that the volatile profile of meat is more reliable than physicochemical profiles for developing an analytical tool for quickly identifying undesired meat in meat-derived products.
Volatilomics; Meatball; PLS-DA; Adulteration; Halal.
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GEOZS, IJS, IMTLJ, KILJ, KISLJ, NLZOH, NUK, OILJ, PNG, SAZU, SBCE, SBJE, UILJ, UL, UM, UPCLJ, UPUK, ZAGLJ, ZRSKP
Hepatocellular carcinoma (HCC) accounts for up to 90% of all primary liver cancers worldwide. Cinobufagin is recognized to inhibit miR-494 as the HCC target. Increased expression of TNF-α results in ...an inadequate response to liver anticancer drugs. The models in this study were cinobufagin, cycloartenol, and ethyl acetate fractions of Ganoderma lucidum, 2–5. Seven docking targets in this study were Akt, ERK1, ERK2, PI3K, TNF-α, TNFR1, and TNFR2. Cycloartenol and compound 4 comply with Veber’s rules, Lipinski’s rule of 5, and demonstrate moderate toxicity. The action implies a potential docking target since it produces bond affinities with the compound 2–5 that agree with the IC50 in the literature, which is based on in vitro experiments. Akt as a receptor target is AZD5363. Cycloartenol shows a low ability to inhibit Akt. Conversely, compound 4 inhibits the Akt better than that of cycloartenol, although it is not as good as cinobufagin and AZD5363. Therefore, compound 4, a triterpenoid with a basic framework of lanostane has the potential to be an anticancer candidate for the liver.
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