Papers by Indira Prabasari
Green grass jelly edible coating maintains shelf life of sapota fruit (Manilkara zapota)
IOP Conference Series: Earth and Environmental Science
Sapota is one of fruits with short period of shelf life. One of techniques to extend sapota’s she... more Sapota is one of fruits with short period of shelf life. One of techniques to extend sapota’s shelf life is edible coating. Currently, hydrocolloid green grass jelly combining with sodium alginate was used and evaluated to determine its effect on the shelf life of sapota fruit. Coating was done using two different concentration of green grass jelly, 0.2% and 0.4% and no treatment as a control treatment. Coated sapota were stored at room temperature and evaluated every day, including weight loss, colour change, firmness, total acidity, total soluble solid, and reducing sugar. The result showed that 0.4% green grass jelly treatment significantly (p>0.05) inhibit fruit softness, colour change during storage and fruit decay compared to control treatment. The coating fruits delayed the increase in total soluble solid as compared to control fruits. At the end, edible coating treatments extended its shelf life by 2 days compare with the control. The result suggest that green grass jelly...
Pemanasan dan pelapisan alginat sebagai upaya mempertahankan kualitas sawo yang diolah minimal
Planta Tropika: Journal of Agro Science
Effect of Pre-cooling and Chitosan Treatment on Pineapple (Ananas comosus (L.) Merr.) Quality During Cold Storage
IOP Conference Series: Earth and Environmental Science, 2022
Precooling showed promises treatment for chilling injury symptom in the fruit. The research aimed... more Precooling showed promises treatment for chilling injury symptom in the fruit. The research aimed to determine the effect of pre-cooling dan coating treatment using chitosan to the internal browning symptoms of pineapples during cold storage at 10°C. The pineapples of cultivar “Smooth Cayenne” were treated with 6 treatments, namely P0C0 (no pre-cooling and no chitosan), P0C1 (no pre-cooling and chitosan), P1C0 (1-day pre-cooling and no chitosan), P1C1 (1-day pre-cooling and chitosan), P2C0 (3-day pre-cooling and no chitosan), P2C1 (3-day pre-cooling and chitosan). Fruits qualities were evaluated by their weight loss, firmness, chilling injury, and chemical compounds including titratable acidity, phenol compounds, and reducing sugar. The analyses were performed on day 7, 14, 21, 28, and 28+3 days of storage. Each treatment was replicated three times and the data was analyzed using factorial complete randomized design (CRD). The result showed that pre-cooling and chitosan was able to ...
Wasserbestimmung in indonesischen Früchten und Fruchtprodukten
Pemanfaatan Lahan Sempit Melalui Budidaya Sayuran DI Dukuh Tangkilan Sleman
Dasa Wisma Alamanda berada di Dukuh Tangkilan, RT 7 dan RW 23, Desa Sidoarum, Kecamatan Godean, K... more Dasa Wisma Alamanda berada di Dukuh Tangkilan, RT 7 dan RW 23, Desa Sidoarum, Kecamatan Godean, Kabupaten Sleman. Permasalahan yang dihadapi anggota Dasa Wisma Alamanda diantaranya pemahaman dan keterampilan yang kurang untuk budidaya sayuran di lahan sempit. Selain itu kondisi rumah dengan halaman terbatas karena berada di area perumahan juga menjadi masalah dalam budidaya sayuran. Solusi yang ditawarkan adalah penyuluhan serta praktik budidaya sayuran di lahan sempit. Metode yang digunakan untuk mencapai tujuan tersebut melalui penyuluhan, pelatihan, demonstrasi, dan pendampingan budidaya sayuran di lahan sempit. Hasil penyuluhan, pelatihan, dan praktik budidaya sayuran di lahan sempit menunjukkan bahwa pemahaman anggota Dasa Wisma Alamanda terhadap pengetahuan dan praktik budidaya sayuran di lahan sempit mencapai 84,4% sebelum dilakukan penyuluhan, pelatihan serta praktik budidaya sayuran. Pemahaman tersebut meningkat menjadi 98,3% setelah mengikuti penyuluhan, pelatihan dan ...
Pectic from Mature Orange (Citrus Sinensis) Fruit Albedo Cell Walls: Sequential Extraction and Chemical Characterization
Water content determination of Indonesian fruits and fruit products
GIT laboratory journal Europe, 2003
Water content is very often determined by drying techniques, although these do not in fact measur... more Water content is very often determined by drying techniques, although these do not in fact measure water content but the mass loss under the conditions applied. The results of such analyses can however be matched with the water content determined by another method which serves as reference when the parameters are chosen in an appropriate way. In this work the water content of fruits and fruit products from Indonesia was determined by Karl Fischer titration. It could be shown that the values found can be reproduced by halogen drying.
The research studied properties of biodegradable film from the mixture of sago starch and chitosa... more The research studied properties of biodegradable film from the mixture of sago starch and chitosan. The biodegradable film was obtained by solution casting method with addition of glycerol 1.5% as plasticizer. Mechanical properties of biodegradable film from sago starch and chitosan were determined including tensile strength, elongation, color and biodegradability. To study shape surface morphology of biodegradable film, the microfracture of biodegradable film was observed by scanning electron microscopy (SEM). Biodegradable film with the composition of sago starch and chitosan 1:1 significantly had the lowest number of tensile strength. The study revealed that addition of chitosan improved biopolymer elongation and brightness, but it weakened tensile strength of biopolymer and reduced its biodegradability.
IOP Conference Series: Earth and Environmental Science
The research aimed to study the effect of various concentration of L-arginine and time of immersi... more The research aimed to study the effect of various concentration of L-arginine and time of immersion in inhibiting enzymatic browning on fresh-cut Salacca. The experiment was conducted in Single Factor Completely Randomized Design with treatments as follows: (P0) Control, (P1) L-arginine 50 mM and immersion time 5 min, (P2) L-arginine 50 mM and immersion time 10 min, (P3) L-arginine 50 mM and immersion time 15 min, (P4) L-arginine 100 mM and immersion time 5 min, (P5) L-arginine 100 mM and immersion time 10 min, (P6) L-arginine 100 mM and immersion time 15 min, (P7) L-arginine 150 mM and immersion time 5 min, (P8) L-arginine 150 mM and immersion time 10 min, (P9) L-arginine 150 mM and immersion time 15 min. The result showed that L-arginine prevented synthesis of phenolic compound that promotes browning development. However color measurement of fresh-cut Salacca indicated that L-Arginine was able to prevent browning only up to 9 days. Meanwhile various immersion times did not give si...
Modified Atmosphere Packaging and Heat Treatment for Maintaining the Quality of Fresh-cut Pineapple (Ananas comosus)
IOP Conference Series: Earth and Environmental Science
Peel Ultrastructure During Developmental Stages of Citrus Sinensis (L.) Osbeck
Planta Tropika : Jurnal Agrosains (Journal of Agro Science)
The peel structureof Valencia orange (Citrus sinensis (L.) Osbeck) was examined using Scanning El... more The peel structureof Valencia orange (Citrus sinensis (L.) Osbeck) was examined using Scanning Electron Microscopy (SEM) and showed the distinct regions of the peel: the outer-yellowish part that was called the flavedo and the inner part of the peel that was called the albedo. The flavedo has compact cells with oil glands embedded in it whereas the albedo contains of spongy cells with vascular bundles embedded in it. The ultrastructural examination of the albedo during development revealed the changes of albedo morphology from compact tissue to the loosely arranged tissue. In addition, the distribution of polysaccharide cell walls was observed with histochemical staining and later the distribution of peptic polysaccharide was conducted using anti-pectin monoclonal antibodies (mAbs). Histochemical staining during development demonstrated the difference of abundance of polysaccharide at the tissue level. Furthermore, the distribution of homogalacturonan (HG) was studied with mAb JIM5 that recognizes low methyl-esterified HG and JJM7 which labels high methyl-esterified HG. The observation at the fruit level was conducted using tissue printing and the result showed that low and high methyl-esterified HG was distributed almost similar at the fruit level. Further experiment at the tissue level was performed using Light Microscopy (LM) and revealed that HG was found more abundant in the albedo and vascular bundle followed by the flavedo and oil gland.
Classification of Mangosteen Surface Quality Using Principal Component Analysis
Emerging Information Science and Technology
TELKOMNIKA (Telecommunication Computing Electronics and Control)
This study aimed to design an accurate and practical system of leaf area determination using a sm... more This study aimed to design an accurate and practical system of leaf area determination using a smartphone. A software application for leaf area computation was developed using Open CV (Open Source Computer Vision) library. Open CV software was tested to estimate the accuracy of leaf area calculation. Leaf area calculations were undertaken using three different image resolutions to compare their accuracy. The results of the software calculations were then compared with the results of the laboratory leaf area meter to identify any errors. The results showed that higher image resolutions improved accuracy by reducing errors. High resolution image gave higher accuracy, however processing speed decreased. Leaf measurement in this project resulted in accuracy range between 92.8% to 99.0%. It was concluded that the Open CV algorithm gave fast and adequate accuracy for leaf area calculation, and that the smartphone mobile application system was practical for field use.
Planta Tropika: Journal of Agro Science
Struktur kulit jeruk Valencia (Citrus sinensis (L.) Osbeck] diuji menggunakan Scanning Electron M... more Struktur kulit jeruk Valencia (Citrus sinensis (L.) Osbeck] diuji menggunakan Scanning Electron Microscopy (SEM) dan menunjukkan bagian yang berbeda dari kulitnya: bagian luar berwarna kekuningan yang disebut flavedo dan bagian dalam kulit yang disebut albedo. Flavedo memiliki sel kompak dengan kelenjar minyak tertanam di dalamnya sedangkan albedo mengandung sel spons dengan ikatan pembuluh tertanam di dalamnya. Pengujian ultrastruktur dari albedo pada masa perkembangan menunjukkan perubahan morfologi albedo dari jaringan kompak menjadi jaringan yang longgar. Selain itu, distribusi polisakarida pada dinding sel diamati dengan pewarnaan histokimia dan kemudian distribusi polisakarida peptin dilakukan dengan menggunakan monoklonal antibodi anti-pektin (mAbs). Pewarnaan histokimia selama fase perkembangan menunjukkan perbedaan jumlah polisakarida pada tingkat jaringan. Selanjutnya, distribusi homogalacturonan (HG) dipelajari dengan menggunakan mAb JIM5 yang mengenali HG esterifikasi metil rendah dan JJM7 dengan label HG esterifikasi metil tinggi. Pengamatan pada buah dilakukan dengan menggunakan pencetakan jaringan dan hasilnya menunjukkan bahwa HG esterifikasi metil rendah dan tinggi didistribusikan hampir merata ke selurah bagian buah. Penelitian lanjutanpada tingkat jaringan dilakukan dengan menggunakan Light Microscopy (LM) dan menunjukkan bahwa HG ditemukan lebih banyak di dalam Albedo dan jaringan pembuluh diikuti oleh flavedo dan kelenjar minyak.
Water content determination of Indonesian fruits and fruit products
Git Laboratory Journal Europe, 2003
Wasserbestimmung in indonesischen Früchten und Fruchtprodukten
Git, 2003
Journal of Food Protection, 2012
The type of sampling technique used to obtain food samples is fundamental to the success of micro... more The type of sampling technique used to obtain food samples is fundamental to the success of microbiological analysis. Destructive and nondestructive techniques, such as tissue excision and rinsing, respectively, are widely employed in obtaining samples from chicken carcasses. In this study, four sampling techniques used for chicken carcasses were compared to evaluate their performances in the enumeration of hygiene indicator microorganisms. Sixty fresh chicken carcasses were sampled by rinsing, tissue excision, superficial swabbing, and skin excision. All samples were submitted for enumeration of mesophilic aerobes, Enterobacteriaceae, coliforms, and Escherichia coli. The results were compared to determine the statistical significance of differences and correlation (P < 0.05). Tissue excision provided the highest microbial counts compared with the other procedures, with significant differences obtained only for coliforms and E. coli (P < 0.05). Significant correlations (P <...
Pectic polysaccharides from mature orange (Citrus sinensis) fruit albedo cell walls: Sequential extraction and chemical characterization
Carbohydrate Polymers, 2011
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Papers by Indira Prabasari