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Papers by kendri wahyuningsih

IOP Conference Series: Earth and Environmental Science

Mint oil has many applications including foods, perfumes and fragrances, pharmaceuticals, cosmeti... more Mint oil has many applications including foods, perfumes and fragrances, pharmaceuticals, cosmetics and pest control. This essential oil is easily damaged because of its high sensitivity to environmental conditions such as heat, oxygen, light and reactions with other compounds. Encapsulation provides protection of the oil against these undesirable conditions. This study was aimed at evaluating the characteristics of mint oil encapsulated in polyethylene glycol (PEG 6000) as influenced by mint oil load. Mint oil was encapsulated in polyethylene glycol at four different percentages (5.0, 7.5, 10 and 12.5%) using a melt dispersion technique. The experiment was done in two replicates. The encapsulates were characterized for their morphology, size attributes and thermal properties. Particulate sizes ranged from 281.4 – 569.5 nm and tended to increase with the increase in oil load. Microstructure of the particles examined under scanning electron microscope showed irregular flakes with siz...

IOP Conference Series: Earth and Environmental Science

Eucalyptus citriodora oil is an essential oil that contains volatile active compounds. To slow do... more Eucalyptus citriodora oil is an essential oil that contains volatile active compounds. To slow down the process of releasing such volatile compounds, a binding agent such as a polymer matrix is needed. This research aimed to prepare and characterize the properties of Eucalyptus citriodora oil encapsulated in polymer matrices. Development of nanoencapsulated Eucalyptus citriodora was prepared using the melt-dispersion method and polymer matrices (PEG-6000 and paraffin wax) with the addition of Mentha piperita oil as aroma enhancer at a ratio of 1:1. The gas chromatography analysis showed that Eucalyptus citriodora oil contains volatile compounds (citronellal 76.17%). The nanoencapsulated eucalyptus powder produced using the PEG-6000 matrix, in terms of properties, was better than that using paraffin for having smaller particle size and being difficult to agglomerate at room temperature. The average size of oil droplets of nanoencapsulated Eucalyptus citriodora in the PEG-6000 matrix ...

THE 5TH INTERNATIONAL CONFERENCE ON MATHEMATICS AND SCIENCE EDUCATION (ICoMSE) 2021: Science and Mathematics Education Research: Current Challenges and Opportunities

Durian skin is a by-product of durian fruit consumption. One-third of durian fruit is edible; how... more Durian skin is a by-product of durian fruit consumption. One-third of durian fruit is edible; however, the seeds and skin are discarded. This durian skin waste can be valorised into value-added products, namely cellulosic and hemicellulosic fractions, as a reinforcement material. By alkaline extraction, cellulose, hemicellulose, and lignin were extracted from durian skin fibre. Subsequently, these fractions were applied to the biocomposite biodegradable foam formulation and used in vegetable packaging. This study aimed to utilise the fibre obtained from durian skin and characterise biodegradable foam reinforced by fractions extracted from durian skin fibre (DSF) and determine its suitability for food packaging. This study used thermopressing to generate biodegradable food trays from corn starch with additional extracted fractions (cellulose, hemicellulose, and lignin) from durian skin. The effect of several formulations of extracted fractions from durian skin on bio-foam properties was investigated. Durian skins were dried and milled to obtain powder durian skin. Two types of powder, namely rough and fine powder durian skin, with moisture content ranging from 6.83-8.17%(w/w). The composition of the rough durian powder were 55.28% of cellulosic fraction, 11.27% of hemicellulosic fraction, and 1.08% of lignin fraction. Additionally, the fine durian powder consists 30.78% of cellulosic fraction, 22.53% of hemicellulosic fraction, and 19.05% of lignin. All trays presented thicknesses between 3 and 4.15 mm, density between 0.16 and 0.64 g cm-3, and moisture content between 1.47 and 6.66% (dry basis). The addition of cellulose and hemicellulose fractions significantly affected the trays' physical and mechanical properties. All trays exhibited colour and structural changes during application storage for seven days at 25 o C. The formulation presenting the best properties contained 2% of hemicellulose and maximal tensile strength.

Universitas Gadjah Mada, 2018

IOP Conference Series: Earth and Environmental Science, 2021

Biofoam (biodegradable foam) is food packaging made of starch with biodegradable characteristic t... more Biofoam (biodegradable foam) is food packaging made of starch with biodegradable characteristic that environmentally friendly. To produce starch-based biofoam with good physical characteristic, requires large amount of starch (30% to 60%) in the formula. To be economical and to reduce the use of starch, it is needed to add filler material. This research aimed to investigate the effect of biosilica and coconut oil addition on the characteristic of cassava starch-based biofoam. Biosilica used as biofiller was extracted from rice husk. In this research, biofoam control (without filler), filled with commercial silica, filled with biosilica and filled with biosilica plus coconut oil were compared. Products were characterized on physical properties namely moisture content, density, color (Chromameter), contact angel (3D-Optic Microscope), crystallinity (X-Ray Diffraction) and surface morphology (Scanning Electron Microscope). Meanwhile mechanical properties were measured on compressive st...

IOP Conference Series: Earth and Environmental Science, 2021

Nano-biosilica extracted from rice husk, an abundant by-product of rice milling, has many potenti... more Nano-biosilica extracted from rice husk, an abundant by-product of rice milling, has many potential applications in industry. However, the high amount of hydroxyl group in silica make it easy to adsorb moisture and form aggregates that are difficult to distribute in the hydrophobic matrices. This research aimed to modify the surface of nano-biosilica by using a coupling agent and characterize the changes in physical properties. Nano-biosilica was extracted using a sol–gel technique and treated with a silane coupling agent (bis-(triethoxy-silyl-propyl) tetrasulfide/TESPT) at concentrations of 0–20%. Characterization included colour (chromametry), weight increase (gravimetry), crystallinity (X-Ray Diffraction/XRD), microscopic structure (Scanning Electron Microscopy/SEM), functional groups (Fourier Transform – Infrared Spectroscopy/FT-IR), silica content (X-Ray Fluorescence Spectroscopy/XRF), and specific pore surface area (Brunauer Emmett-Teller/BET). Crystallinity decreased with the...

Agrointek : Jurnal Teknologi Industri Pertanian

IOP Conference Series: Earth and Environmental Science, 2019

Several factors affect the shelf life of mangosteen fruit, such as the low quality of fruit at ha... more Several factors affect the shelf life of mangosteen fruit, such as the low quality of fruit at harvest time or poor storage and transportation precise conditions before the fruit is consumed. Cause of poor quality of mangosteen fruit for export due to hardening of fruit skin after harvest and harvesting through matures caused by the lack of proper handling of harvest and postharvest. The objective of the research was to study the effect of hormone treatment, coating material and ethylene absorber to the shelf life of mangosteen. Treatments were implemented by coating process using a combination of GA3 hormone treatment and coating materials (chitosan and wax). The other treatments used were combination of plastic and teabag packaging containing KMNO4. The study was designed using a completely randomized design. Observations included external visuals, internal visuals, weight loss, color, texture, and skin structure. The data analysis was performed using SPSS 2.1 software. At first w...

Jurnal Penelitian Tanaman Industri

Eucalyptus citriodora merupakan salah satu jenis tanaman penghasil minyak atsiri dengan banyak ma... more Eucalyptus citriodora merupakan salah satu jenis tanaman penghasil minyak atsiri dengan banyak manfaat, termasuk untuk pendukung terapi Covid-19. Salah satu produk yang bisa dikembangkan adalah permen keras (hard candy). Penambahan minyak eukaliptus dalam bentuk nanoenkapsulat pada pembuatan hard candy dapat meningkatkan nilai fungsional, serta memberi efek melegakan dan cita rasa khas ketika dikonsumsi. Tujuan penelitian adalah mengetahui karakteristik fisik, kimia, sensoris, dan formulasi terbaik pada produk hard candy pelega tenggorokan dengan penambahan nanoenkapsulat minyak eukaliptus-peppermint.

Jurnal Penelitian Pascapanen Pertanian, 2015

Berbagai upaya telah dilakukan untuk mengurangi ketergantungan terhadap plastik berbahan baku min... more Berbagai upaya telah dilakukan untuk mengurangi ketergantungan terhadap plastik berbahan baku minyak bumi yang persediaannya terbatas dan sulit terdegradasi secara alami sehingga dapat menimbulkan masalah lingkungan. Polivinil Alkohol/PVA memiliki lingkungan dan sifat mekanis setara plastik konvensional. Penelitian ini bertujuan untuk mengetahui pengaruh penambahan nanoselulosa metode casting solution. Percobaan dilakukan dengan mencampurkan larutan PVA dengan berbagai konsentrasi nanoselulosa serat kristalinitas dan morfologi. Hasil penelitian menunjukkan bahwa penambahan nanoselulosa serat nanas 10-40% dapat meningkatkan kuat tarik dan elongasi, namun penambahan hingga 50% justru menurunkan nilai elongasi. Penambahan plasticizer gliserol cenderung menurunkan kuat tarik dan elongasi. Hal ini didukung oleh data XRD yang menunjukkan bahwa penambahan nanoselulosa efektif meningkatkan sifat kristalinitas, namun sifat tersebut menurun setelah ditambahkan gliserol. Penambahan nanoselulosa 40% dan tanpa Kata kunci ABSTRACT A variety of attempts have been made to reduce the dependence on petroleum raw materials based plastics which are limited supply the mechanical properties close to conventional plastic. The objectives of research was to know the effect of pineapple nanocellulose effective in increasing tensile strength and elongation, but the higher addition (of up to 50%) resulted in decreased elongation. The addition and without glycerol.

Prosiding Ilmiah Seminar Nasional Lignoselulosa 2020 ini merupakan salah satu upaya untuk mendise... more Prosiding Ilmiah Seminar Nasional Lignoselulosa 2020 ini merupakan salah satu upaya untuk mendiseminasikan hasil-hasil penelitian di Pusat Penelitian Biomaterial LIPI terkait penelitian, pengembangan, dan pengkajian bahan bioproduk yang bersumber dari lignoselulosa. Artikel-artikel dalam prosiding ini telah diseminarkan dalam Seminar Nasional Lignoselulosa 2020 dengan tema “Tantangan dan Peluang Industrialisasi Produk Berbasis Lignoselulosa” dengan beragam bahasan, di antaranya bioproduk, material, bioenergi, dan lingkungan. Prosiding ini menyajikan sebanyak 13 makalah lengkap dari partisipasi aktif, peserta dari kalangan peneliti, akademisi, dan praktisi industri. Selain itu, juga terdapat 5 buah abstrak dari pemakalah kunci (keynote speaker).

Jurnal Penelitian Pascapanen Pertanian

Biosilica from rice husks has a potential that can be used as a reinforcing filler in the product... more Biosilica from rice husks has a potential that can be used as a reinforcing filler in the production of rubber finished goods displace mine silica. But it’s difficult to disperse homogenetically into a rubber finished goods, so it needs to modify the surface using a coupling agent sign. The capacity for the production of modified-biosilica would need to be at a great level to meet the needs of the rubber industry. The purpose of the research is to identify the characteristics of the modified-biosilica by silane TESPT (bis-(3-triethoxysilylpropyl) tetrasulfane) that resulted from increasing the weight of biosilica in the production process and the application as reinforcing filler on the rubber. Increasing of weight in the production process was done gradually on a scale of 0.5; 1; 2; and 5 kg of biosilica per process using a mixer-propeller. The technique on surface modifications was using a one-step modification (OSM) and two-step modification (TSM). Surface modification treatment ...

Journal of Engineering and Technological Sciences, 2021

Silica extracted from rice husk (silica nanoparticles, Si-NP RHA) has great potential for industr... more Silica extracted from rice husk (silica nanoparticles, Si-NP RHA) has great potential for industrial use, particularly as filler in the rubber industry. However, silica is poorly dispersed in the matrix and needs to be modified by a silane linking agent (bis-(3-triethoxysilylpropyl) tetrasulfane (TESPT)) to improve its mixing properties. As a result, a large amount of used solvent containing silane TESPT is produced. This study aimed to evaluate the surface modification of silica nanoparticles from rice husk employing this used solvent and to characterize the particles’ physical properties. Silica nanoparticles were extracted from rice husk using a sol-gel method. FTIR spectography demonstrated that the TESPT on fresh solvent and the used solvent were successfully grafted onto the surface of Si-NP RHA. Si-NP RHA modified by Two Step Modification (TSM) employing used solvent had strong absorption peaks at wave numbers of 2927.94 cm-1 and 1446.61 cm-1, which are associated with vibrat...

Jurnal Penelitian Tanaman Industri

Lada putih (Piper nigrum) hasil olahan petani secara tradisional sering menghasilkan biji lada pu... more Lada putih (Piper nigrum) hasil olahan petani secara tradisional sering menghasilkan biji lada putih yang berbau menyimpang (off-flavor) menyerupai bau kotoran dan cemaran mikroba melebihi ambang batas menurut SNI. Penelitian telah dilakukan di Laboratorium Balai Besar Penelitian dan Pengembangan Pascapanen dari bulan Februari-November 2019. Tujuan penelitian ini adalah mengetahui pengaruh penanganan ulang biji lada putih secara termal (pemberian uap panas) dan non-termal (perendaman dalam air mengandung ozon) terhadap sifat fisiko-kimia, penurunan kontaminan mikroba dan penekanan bau menyimpang. Percobaan dilakukan menggunakan Rancangan Acak Lengkap (RAL) dengan 7 perlakuan dan tiga kali ulangan. Perlakuan tersebut meliputi: kontrol (tanpa perlakuan penanganan ulang), perlakuan termal dengan pemberian uap panas pada 90-100 o C selama 30, 60 dan 90 menit serta perlakuan non-termal yaitu perendaman dalam air berozon selama 20, 40, dan 60 menit. Hasil penelitian menunjukkan bahwa penanganan ulang lada putih secara termal dan non-termal telah mampu memperbaiki mutu fisik, menurunkan kontaminan mikroba dan menekan bau menyimpang pada lada putih. Hasil terbaik diperoleh pada perlakuan secara termal selama 30 menit yang mampu meningkatkan kualitas biji lada putih hingga memenuhi SNI mutu II, menekan kontaminan mikroba dan bau menyimpang secara maksimal. Hasil analisis GC-MS menunjukkan bahwa perlakuan termal selama 30 menit telah mampu menurunkan persentase senyawa kimia penyebab bau menyimpang (menyerupai bau tinja dan apek), yaitu senyawa asam heksanoat, p-cresol, dan 3metil indol. Sedangkan limpahan senyawa asam propanoat dan asam heptanoat sudah hilang tidak terdeteksi oleh instrumen.

AGROINTEK

Milling is of important process to improve nutritional and palatability of sorghum seeds for huma... more Milling is of important process to improve nutritional and palatability of sorghum seeds for human consumption. This study investigated the effect of milling process on protein fraction of sorghum flour and the bran. The result showed that dry milled sorghum flour contained higher protein than those of wet milled sorghum flour, and the highest protein content was found on sorghum bran. Dry-milled sorghum flour has protein fraction in albumin, globulin, kafirin and glutelin higher than those of wet-milled sorghum flour. Wet-millled sorghum flour contained high protein fraction in cross link kafirin and cross link glutelin. Different of protein fractions noticed among the samples suggested that the samples contained different in amount of extractable protein and this was due to the differences in total protein.

Indonesian Journal of Chemistry

West Nusa Tenggara is a center of sea oyster farming for Pinctada maxima in Indonesia. The calciu... more West Nusa Tenggara is a center of sea oyster farming for Pinctada maxima in Indonesia. The calcium carbonate (CaCO3) compounds in the shell are one of the decomposed natural minerals to produce calcium oxide (CaO) compound which is able to be used as an alternative heterogeneous catalyst in nanometer scale. This research aims to discover the control factors which influence the production process of nanometer-scaled CaO heterogeneous catalyst and choose the best condition in its production process with a better-quality product. Calcined pearl shell (P. maxima) powder is milled by using Shaker mill. The experimental design is performed by using Taguchi method with an orthogonal matrix consisting of 4 control factor variables, i.e. milling time, ball-to-powder weight ratio, the diameter of milling beads and extent of milling the vial. The selection of best control factor variable combination is computed by using multiresponse loss function. ANOVA analysis shows that the product quality...

JURNAL EKSAKTA

Pinctada maxima shells from West Nusa Tenggara has natural minerals called calcite that can be de... more Pinctada maxima shells from West Nusa Tenggara has natural minerals called calcite that can be decomposed into CaO compounds as a green catalyst that heterogeneous, base and environmentally friendly. CaO compounds in the nanometer scale is one option as an alternative substitute or replacement of the use of homogeneous catalysts. The purpose of this study was to test the catalytic activity of CaO compound from the pearl shells (P. maxima) based on particle size. The catalytic activity test has been measured against the percentage of yield of methyl ester produced by alcoholysis reaction. Characterization of nano-CaO compounds has been done using X-ray powder diffraction (XRD), Brunauer Emmett Teller (BET), scanning electron microscope energy-dispersive X-ray spectroscopy (SEM-EDX), transmittance electron microscopy (TEM), while methyl esters has been analyzed using the ASTM method. CaO catalyst on the nanometer-scale have more effective catalytic activity than micrometer scale with ...

Indonesian Journal of Chemistry, 2016

Cellulose from pineapple leaf fibers as one of the natural polymer which has biodegradable prope... more Cellulose from pineapple leaf fibers as one of the natural polymer which has biodegradable property in a nanometer’s scale, can be formed as a filler in composite of Poly(vinyl) Alcohol/PVA is expected to increase the physical, thermal, and barrier properties of composite films similar to conventional plastic. The aim of this study was to examine the effect of fibrillation of cellulose fibers from pineapple leaf fibers using a combined technique of chemical-mechanical treatments, to investigate the reinforcing effect of concentration of nanocellulose fibrils in the polyvinyl alcohol (PVA) matrix on physical properties, thermal properties, water vapor transmission rate, light transmittance and morphological with and without addition of glycerol. Nanocellulose was made from cellulose of pineapple leaf fiber using wet milling (Ultra Fine Grinder). The composite film production was carried out by using casting solution method by mixing PVA solution with nanocellulose (10-50%) and glyce...

IOP Conference Series: Earth and Environmental Science

Mint oil has many applications including foods, perfumes and fragrances, pharmaceuticals, cosmeti... more Mint oil has many applications including foods, perfumes and fragrances, pharmaceuticals, cosmetics and pest control. This essential oil is easily damaged because of its high sensitivity to environmental conditions such as heat, oxygen, light and reactions with other compounds. Encapsulation provides protection of the oil against these undesirable conditions. This study was aimed at evaluating the characteristics of mint oil encapsulated in polyethylene glycol (PEG 6000) as influenced by mint oil load. Mint oil was encapsulated in polyethylene glycol at four different percentages (5.0, 7.5, 10 and 12.5%) using a melt dispersion technique. The experiment was done in two replicates. The encapsulates were characterized for their morphology, size attributes and thermal properties. Particulate sizes ranged from 281.4 – 569.5 nm and tended to increase with the increase in oil load. Microstructure of the particles examined under scanning electron microscope showed irregular flakes with siz...

IOP Conference Series: Earth and Environmental Science

Eucalyptus citriodora oil is an essential oil that contains volatile active compounds. To slow do... more Eucalyptus citriodora oil is an essential oil that contains volatile active compounds. To slow down the process of releasing such volatile compounds, a binding agent such as a polymer matrix is needed. This research aimed to prepare and characterize the properties of Eucalyptus citriodora oil encapsulated in polymer matrices. Development of nanoencapsulated Eucalyptus citriodora was prepared using the melt-dispersion method and polymer matrices (PEG-6000 and paraffin wax) with the addition of Mentha piperita oil as aroma enhancer at a ratio of 1:1. The gas chromatography analysis showed that Eucalyptus citriodora oil contains volatile compounds (citronellal 76.17%). The nanoencapsulated eucalyptus powder produced using the PEG-6000 matrix, in terms of properties, was better than that using paraffin for having smaller particle size and being difficult to agglomerate at room temperature. The average size of oil droplets of nanoencapsulated Eucalyptus citriodora in the PEG-6000 matrix ...

THE 5TH INTERNATIONAL CONFERENCE ON MATHEMATICS AND SCIENCE EDUCATION (ICoMSE) 2021: Science and Mathematics Education Research: Current Challenges and Opportunities

Durian skin is a by-product of durian fruit consumption. One-third of durian fruit is edible; how... more Durian skin is a by-product of durian fruit consumption. One-third of durian fruit is edible; however, the seeds and skin are discarded. This durian skin waste can be valorised into value-added products, namely cellulosic and hemicellulosic fractions, as a reinforcement material. By alkaline extraction, cellulose, hemicellulose, and lignin were extracted from durian skin fibre. Subsequently, these fractions were applied to the biocomposite biodegradable foam formulation and used in vegetable packaging. This study aimed to utilise the fibre obtained from durian skin and characterise biodegradable foam reinforced by fractions extracted from durian skin fibre (DSF) and determine its suitability for food packaging. This study used thermopressing to generate biodegradable food trays from corn starch with additional extracted fractions (cellulose, hemicellulose, and lignin) from durian skin. The effect of several formulations of extracted fractions from durian skin on bio-foam properties was investigated. Durian skins were dried and milled to obtain powder durian skin. Two types of powder, namely rough and fine powder durian skin, with moisture content ranging from 6.83-8.17%(w/w). The composition of the rough durian powder were 55.28% of cellulosic fraction, 11.27% of hemicellulosic fraction, and 1.08% of lignin fraction. Additionally, the fine durian powder consists 30.78% of cellulosic fraction, 22.53% of hemicellulosic fraction, and 19.05% of lignin. All trays presented thicknesses between 3 and 4.15 mm, density between 0.16 and 0.64 g cm-3, and moisture content between 1.47 and 6.66% (dry basis). The addition of cellulose and hemicellulose fractions significantly affected the trays' physical and mechanical properties. All trays exhibited colour and structural changes during application storage for seven days at 25 o C. The formulation presenting the best properties contained 2% of hemicellulose and maximal tensile strength.

Universitas Gadjah Mada, 2018

IOP Conference Series: Earth and Environmental Science, 2021

Biofoam (biodegradable foam) is food packaging made of starch with biodegradable characteristic t... more Biofoam (biodegradable foam) is food packaging made of starch with biodegradable characteristic that environmentally friendly. To produce starch-based biofoam with good physical characteristic, requires large amount of starch (30% to 60%) in the formula. To be economical and to reduce the use of starch, it is needed to add filler material. This research aimed to investigate the effect of biosilica and coconut oil addition on the characteristic of cassava starch-based biofoam. Biosilica used as biofiller was extracted from rice husk. In this research, biofoam control (without filler), filled with commercial silica, filled with biosilica and filled with biosilica plus coconut oil were compared. Products were characterized on physical properties namely moisture content, density, color (Chromameter), contact angel (3D-Optic Microscope), crystallinity (X-Ray Diffraction) and surface morphology (Scanning Electron Microscope). Meanwhile mechanical properties were measured on compressive st...

IOP Conference Series: Earth and Environmental Science, 2021

Nano-biosilica extracted from rice husk, an abundant by-product of rice milling, has many potenti... more Nano-biosilica extracted from rice husk, an abundant by-product of rice milling, has many potential applications in industry. However, the high amount of hydroxyl group in silica make it easy to adsorb moisture and form aggregates that are difficult to distribute in the hydrophobic matrices. This research aimed to modify the surface of nano-biosilica by using a coupling agent and characterize the changes in physical properties. Nano-biosilica was extracted using a sol–gel technique and treated with a silane coupling agent (bis-(triethoxy-silyl-propyl) tetrasulfide/TESPT) at concentrations of 0–20%. Characterization included colour (chromametry), weight increase (gravimetry), crystallinity (X-Ray Diffraction/XRD), microscopic structure (Scanning Electron Microscopy/SEM), functional groups (Fourier Transform – Infrared Spectroscopy/FT-IR), silica content (X-Ray Fluorescence Spectroscopy/XRF), and specific pore surface area (Brunauer Emmett-Teller/BET). Crystallinity decreased with the...

Agrointek : Jurnal Teknologi Industri Pertanian

IOP Conference Series: Earth and Environmental Science, 2019

Several factors affect the shelf life of mangosteen fruit, such as the low quality of fruit at ha... more Several factors affect the shelf life of mangosteen fruit, such as the low quality of fruit at harvest time or poor storage and transportation precise conditions before the fruit is consumed. Cause of poor quality of mangosteen fruit for export due to hardening of fruit skin after harvest and harvesting through matures caused by the lack of proper handling of harvest and postharvest. The objective of the research was to study the effect of hormone treatment, coating material and ethylene absorber to the shelf life of mangosteen. Treatments were implemented by coating process using a combination of GA3 hormone treatment and coating materials (chitosan and wax). The other treatments used were combination of plastic and teabag packaging containing KMNO4. The study was designed using a completely randomized design. Observations included external visuals, internal visuals, weight loss, color, texture, and skin structure. The data analysis was performed using SPSS 2.1 software. At first w...

Jurnal Penelitian Tanaman Industri

Eucalyptus citriodora merupakan salah satu jenis tanaman penghasil minyak atsiri dengan banyak ma... more Eucalyptus citriodora merupakan salah satu jenis tanaman penghasil minyak atsiri dengan banyak manfaat, termasuk untuk pendukung terapi Covid-19. Salah satu produk yang bisa dikembangkan adalah permen keras (hard candy). Penambahan minyak eukaliptus dalam bentuk nanoenkapsulat pada pembuatan hard candy dapat meningkatkan nilai fungsional, serta memberi efek melegakan dan cita rasa khas ketika dikonsumsi. Tujuan penelitian adalah mengetahui karakteristik fisik, kimia, sensoris, dan formulasi terbaik pada produk hard candy pelega tenggorokan dengan penambahan nanoenkapsulat minyak eukaliptus-peppermint.

Jurnal Penelitian Pascapanen Pertanian, 2015

Berbagai upaya telah dilakukan untuk mengurangi ketergantungan terhadap plastik berbahan baku min... more Berbagai upaya telah dilakukan untuk mengurangi ketergantungan terhadap plastik berbahan baku minyak bumi yang persediaannya terbatas dan sulit terdegradasi secara alami sehingga dapat menimbulkan masalah lingkungan. Polivinil Alkohol/PVA memiliki lingkungan dan sifat mekanis setara plastik konvensional. Penelitian ini bertujuan untuk mengetahui pengaruh penambahan nanoselulosa metode casting solution. Percobaan dilakukan dengan mencampurkan larutan PVA dengan berbagai konsentrasi nanoselulosa serat kristalinitas dan morfologi. Hasil penelitian menunjukkan bahwa penambahan nanoselulosa serat nanas 10-40% dapat meningkatkan kuat tarik dan elongasi, namun penambahan hingga 50% justru menurunkan nilai elongasi. Penambahan plasticizer gliserol cenderung menurunkan kuat tarik dan elongasi. Hal ini didukung oleh data XRD yang menunjukkan bahwa penambahan nanoselulosa efektif meningkatkan sifat kristalinitas, namun sifat tersebut menurun setelah ditambahkan gliserol. Penambahan nanoselulosa 40% dan tanpa Kata kunci ABSTRACT A variety of attempts have been made to reduce the dependence on petroleum raw materials based plastics which are limited supply the mechanical properties close to conventional plastic. The objectives of research was to know the effect of pineapple nanocellulose effective in increasing tensile strength and elongation, but the higher addition (of up to 50%) resulted in decreased elongation. The addition and without glycerol.

Prosiding Ilmiah Seminar Nasional Lignoselulosa 2020 ini merupakan salah satu upaya untuk mendise... more Prosiding Ilmiah Seminar Nasional Lignoselulosa 2020 ini merupakan salah satu upaya untuk mendiseminasikan hasil-hasil penelitian di Pusat Penelitian Biomaterial LIPI terkait penelitian, pengembangan, dan pengkajian bahan bioproduk yang bersumber dari lignoselulosa. Artikel-artikel dalam prosiding ini telah diseminarkan dalam Seminar Nasional Lignoselulosa 2020 dengan tema “Tantangan dan Peluang Industrialisasi Produk Berbasis Lignoselulosa” dengan beragam bahasan, di antaranya bioproduk, material, bioenergi, dan lingkungan. Prosiding ini menyajikan sebanyak 13 makalah lengkap dari partisipasi aktif, peserta dari kalangan peneliti, akademisi, dan praktisi industri. Selain itu, juga terdapat 5 buah abstrak dari pemakalah kunci (keynote speaker).

Jurnal Penelitian Pascapanen Pertanian

Biosilica from rice husks has a potential that can be used as a reinforcing filler in the product... more Biosilica from rice husks has a potential that can be used as a reinforcing filler in the production of rubber finished goods displace mine silica. But it’s difficult to disperse homogenetically into a rubber finished goods, so it needs to modify the surface using a coupling agent sign. The capacity for the production of modified-biosilica would need to be at a great level to meet the needs of the rubber industry. The purpose of the research is to identify the characteristics of the modified-biosilica by silane TESPT (bis-(3-triethoxysilylpropyl) tetrasulfane) that resulted from increasing the weight of biosilica in the production process and the application as reinforcing filler on the rubber. Increasing of weight in the production process was done gradually on a scale of 0.5; 1; 2; and 5 kg of biosilica per process using a mixer-propeller. The technique on surface modifications was using a one-step modification (OSM) and two-step modification (TSM). Surface modification treatment ...

Journal of Engineering and Technological Sciences, 2021

Silica extracted from rice husk (silica nanoparticles, Si-NP RHA) has great potential for industr... more Silica extracted from rice husk (silica nanoparticles, Si-NP RHA) has great potential for industrial use, particularly as filler in the rubber industry. However, silica is poorly dispersed in the matrix and needs to be modified by a silane linking agent (bis-(3-triethoxysilylpropyl) tetrasulfane (TESPT)) to improve its mixing properties. As a result, a large amount of used solvent containing silane TESPT is produced. This study aimed to evaluate the surface modification of silica nanoparticles from rice husk employing this used solvent and to characterize the particles’ physical properties. Silica nanoparticles were extracted from rice husk using a sol-gel method. FTIR spectography demonstrated that the TESPT on fresh solvent and the used solvent were successfully grafted onto the surface of Si-NP RHA. Si-NP RHA modified by Two Step Modification (TSM) employing used solvent had strong absorption peaks at wave numbers of 2927.94 cm-1 and 1446.61 cm-1, which are associated with vibrat...

Jurnal Penelitian Tanaman Industri

Lada putih (Piper nigrum) hasil olahan petani secara tradisional sering menghasilkan biji lada pu... more Lada putih (Piper nigrum) hasil olahan petani secara tradisional sering menghasilkan biji lada putih yang berbau menyimpang (off-flavor) menyerupai bau kotoran dan cemaran mikroba melebihi ambang batas menurut SNI. Penelitian telah dilakukan di Laboratorium Balai Besar Penelitian dan Pengembangan Pascapanen dari bulan Februari-November 2019. Tujuan penelitian ini adalah mengetahui pengaruh penanganan ulang biji lada putih secara termal (pemberian uap panas) dan non-termal (perendaman dalam air mengandung ozon) terhadap sifat fisiko-kimia, penurunan kontaminan mikroba dan penekanan bau menyimpang. Percobaan dilakukan menggunakan Rancangan Acak Lengkap (RAL) dengan 7 perlakuan dan tiga kali ulangan. Perlakuan tersebut meliputi: kontrol (tanpa perlakuan penanganan ulang), perlakuan termal dengan pemberian uap panas pada 90-100 o C selama 30, 60 dan 90 menit serta perlakuan non-termal yaitu perendaman dalam air berozon selama 20, 40, dan 60 menit. Hasil penelitian menunjukkan bahwa penanganan ulang lada putih secara termal dan non-termal telah mampu memperbaiki mutu fisik, menurunkan kontaminan mikroba dan menekan bau menyimpang pada lada putih. Hasil terbaik diperoleh pada perlakuan secara termal selama 30 menit yang mampu meningkatkan kualitas biji lada putih hingga memenuhi SNI mutu II, menekan kontaminan mikroba dan bau menyimpang secara maksimal. Hasil analisis GC-MS menunjukkan bahwa perlakuan termal selama 30 menit telah mampu menurunkan persentase senyawa kimia penyebab bau menyimpang (menyerupai bau tinja dan apek), yaitu senyawa asam heksanoat, p-cresol, dan 3metil indol. Sedangkan limpahan senyawa asam propanoat dan asam heptanoat sudah hilang tidak terdeteksi oleh instrumen.

AGROINTEK

Milling is of important process to improve nutritional and palatability of sorghum seeds for huma... more Milling is of important process to improve nutritional and palatability of sorghum seeds for human consumption. This study investigated the effect of milling process on protein fraction of sorghum flour and the bran. The result showed that dry milled sorghum flour contained higher protein than those of wet milled sorghum flour, and the highest protein content was found on sorghum bran. Dry-milled sorghum flour has protein fraction in albumin, globulin, kafirin and glutelin higher than those of wet-milled sorghum flour. Wet-millled sorghum flour contained high protein fraction in cross link kafirin and cross link glutelin. Different of protein fractions noticed among the samples suggested that the samples contained different in amount of extractable protein and this was due to the differences in total protein.

Indonesian Journal of Chemistry

West Nusa Tenggara is a center of sea oyster farming for Pinctada maxima in Indonesia. The calciu... more West Nusa Tenggara is a center of sea oyster farming for Pinctada maxima in Indonesia. The calcium carbonate (CaCO3) compounds in the shell are one of the decomposed natural minerals to produce calcium oxide (CaO) compound which is able to be used as an alternative heterogeneous catalyst in nanometer scale. This research aims to discover the control factors which influence the production process of nanometer-scaled CaO heterogeneous catalyst and choose the best condition in its production process with a better-quality product. Calcined pearl shell (P. maxima) powder is milled by using Shaker mill. The experimental design is performed by using Taguchi method with an orthogonal matrix consisting of 4 control factor variables, i.e. milling time, ball-to-powder weight ratio, the diameter of milling beads and extent of milling the vial. The selection of best control factor variable combination is computed by using multiresponse loss function. ANOVA analysis shows that the product quality...

JURNAL EKSAKTA

Pinctada maxima shells from West Nusa Tenggara has natural minerals called calcite that can be de... more Pinctada maxima shells from West Nusa Tenggara has natural minerals called calcite that can be decomposed into CaO compounds as a green catalyst that heterogeneous, base and environmentally friendly. CaO compounds in the nanometer scale is one option as an alternative substitute or replacement of the use of homogeneous catalysts. The purpose of this study was to test the catalytic activity of CaO compound from the pearl shells (P. maxima) based on particle size. The catalytic activity test has been measured against the percentage of yield of methyl ester produced by alcoholysis reaction. Characterization of nano-CaO compounds has been done using X-ray powder diffraction (XRD), Brunauer Emmett Teller (BET), scanning electron microscope energy-dispersive X-ray spectroscopy (SEM-EDX), transmittance electron microscopy (TEM), while methyl esters has been analyzed using the ASTM method. CaO catalyst on the nanometer-scale have more effective catalytic activity than micrometer scale with ...

Indonesian Journal of Chemistry, 2016

Cellulose from pineapple leaf fibers as one of the natural polymer which has biodegradable prope... more Cellulose from pineapple leaf fibers as one of the natural polymer which has biodegradable property in a nanometer’s scale, can be formed as a filler in composite of Poly(vinyl) Alcohol/PVA is expected to increase the physical, thermal, and barrier properties of composite films similar to conventional plastic. The aim of this study was to examine the effect of fibrillation of cellulose fibers from pineapple leaf fibers using a combined technique of chemical-mechanical treatments, to investigate the reinforcing effect of concentration of nanocellulose fibrils in the polyvinyl alcohol (PVA) matrix on physical properties, thermal properties, water vapor transmission rate, light transmittance and morphological with and without addition of glycerol. Nanocellulose was made from cellulose of pineapple leaf fiber using wet milling (Ultra Fine Grinder). The composite film production was carried out by using casting solution method by mixing PVA solution with nanocellulose (10-50%) and glyce...