cover
Article Per Year (5 Year)
All
Home Page
OAI Link
Editorial Team
Contact
Reviewer
Google Scholar
Contact Name
Fiametta Ayu Purwandari
Contact Email
fiametta@ugm.ac.id
Phone
+6285712601130
Journal Mail Official
agritech@ugm.ac.id
Editorial Address
Faculty of Agricultural Technology, Universitas Gadjah Mada, Jl. Flora No. 1, Bulaksumur, Yogyakarta 55281, Indonesia
Location
Kab. sleman,
Daerah istimewa yogyakarta
INDONESIA
agriTECH
Published by Universitas Gadjah Mada
ISSN : 02160455     EISSN : 25273825     DOI : 10.22146/agritech
Core Subject : Agriculture,
Agriculture, Biological Sciences & Forestry
Agritech with registered number ISSN 0216-0455 (print) and ISSN 2527-3825 (online) is a scientific journal that publishes the results of research in the field of food and agricultural product technology, agricultural and bio-system engineering, and agroindustrial technology. This journal is published by Faculty of Agricultural Technology, Universitas Gadjah Mada, Yogyakarta in colaboration with Indonesian Association of Food Technologies (PATPI).
Arjuna Subject : Ilmu Pertanian dan Biologi (Semua) - Ilmu Pertanian dan Biologi (Lain-Lain)
Articles 1,392 Documents
 50   51   52   53   54 
Optimasi Dengan Algoritma RSM-CCD Pada Evaporator Vakum Waterjet Dengan Pengendali Suhu Fuzzy Pada Pembuatan Permen Susu Yusuf Hendrawan; Bambang Susilo; Angky Wahyu Putranto; Dimas Firmanda Al Riza; Dewi Maya Maharani; Mutiara Nisa' Amri
agriTECH Vol 36, No 2 (2016)
Publisher : Faculty of Agricultural Technology, Universitas Gadjah Mada, Yogyakarta, Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (790.355 KB) | DOI: 10.22146/agritech.12868

Abstract

Milk candy is a product which has to be produced under a high temperature to achieve the caramelization process. The use of vacuum system during a food processing is one of the alternatives to engineer the value of a material’s boiling point. The temperature control system and the mixing speed in machine that produce the milk candy were expected to be able to prevent the formation of off-flavour in the final product. A smart control system based on fuzzy logic was applied in the temperature control within the double jacket vacuum evaporator machine that needs stable temperature in the cooking process. The objective of this research is developing vacuum evaporator for milk candy production using fuzzy temperature control. The result in machine and system planning showed that the process of milk candy production was going on well. The parameter optimization of water content and ash content purposed to acquire the temperature point parameter and mixing speed in milk candy production. The optimization method was response surface methodology (RSM), by using the model of central composite design (CCD). The optimization resulted 90.18oC for the temperature parameter and 512 RPM for the mixing speed, with the prediction about 4.69% of water content and 1.57% of ash content.ABSTRAKPermen susu merupakan salah satu produk yang diolah dengan suhu tinggi untuk mencapai proses karamelisasi. Pengolahan pangan dengan sistem vakum merupakan salah satu alternatif untuk merekayasa nilai titik didih suatu bahan. Sistem pengendalian suhu serta kecepatan pengadukan pada mesin produksi permen susu diharapkan dapat mencegah terbentuknya partikel hitam (off-flavour) pada produk akhir. Sistem kontrol cerdas logika fuzzy diaplikasikan dalam pengendalian suhu pada mesin evaporator vakum double jacket yang membutuhkan tingkat stabilitas suhu pemasakan permen susu. Tujuan dari penelitian ini adalah membuat rancang bangun evaporator vakum pada pembuatan permen susu dengan menggunakan pengendali suhu fuzzy. Hasil perancangan mesin dan sistem menunjukkan bahwa proses produksi permen susu dapat berlangsung dengan baik. Optimasi parameter kadar air dan kadar abu dilakukan untuk mendapatkan titik parameter suhu dan kecepatan pengadukan produksi permen susu yang optimum. Metode optimasi menggunakan response surface methodology (RSM) model central composite design (CCD). Hasil optimasi didapatkan parameter suhu 90,18oC dan kecepatan pengadukan 512 RPM, dengan prediksi produk permen susu memiliki nilai kadar air 4,69% dan kadar abu 1,57%.
Pemodelan Proses Pengeringan Mekanis Tepung Kasava dengan Menggunakan Pneumatic Dryer: Hubungan Kapasitas Output dengan Variabel Proses Pengeringan Yus Witdarko; Nursigit Bintoro; Bandul Suratmo; Budi Rahadjo
agriTECH Vol 36, No 2 (2016)
Publisher : Faculty of Agricultural Technology, Universitas Gadjah Mada, Yogyakarta, Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (1021.551 KB) | DOI: 10.22146/agritech.12869

Abstract

In the drying process, output capacity (Qo) is one of important parameter which should be known because it can be used to evaluate the effectiveness of drying process performance. Theoritically, determination of the output capacity of the drying machine in pneumatic drying is still relatively complex. So, a simple calculation method to predict output capacity of the pneumatic drying machine is required. The main objective of this research was to formulate a mathematical relationship between Qo value and various pneumatic drying variables of cassava flour by applying dimensional analysis. The results showed relationship between Qo value and the drying process variables as follows:This equation has a quite high coefficient of determination, and potentially usable for predicting the output capacity in pneumatic drying. Sensitivity analysis indicated that the dimensionless product which had the largest effect on Qo was ... that reached 11.53%.ABSTRAKPada proses pengeringan, kapasitas output (Qo) merupakan salah satu parameter penting yang perlu diketahui. Parameter ini dapat dipakai untuk mengevaluasi efektivitas kinerja proses pengeringan. Pada metode pengeringan secara pneumatik, penentuan kapasitas output mesin pengering secara teoritis, masih relatif komplek. Diperlukan cara perhitungan yang lebih sederhana untuk dapat memprediksi kapasitas output mesin pengering pneumatik. Tujuan dari penelitian ini adalah untuk menghubungkan secara matematis antara nilai Qo dengan beberapa variabel proses pengeringan pneumatik tepung kasava dengan menggunakan metode analisis dimensi. Hasil analisis data memberikan hubungan antara nilai Qo dengan variabel-variabel proses pengeringan sebagai berikut:Persamaan tersebut mempunyai nilai koefisien determinasi yang cukup besar, sehingga dapat digunakan untuk memprediksi kapasitas output pada pengeringan pneumatik. Hasil uji sensitivitas menunjukkan bahwa dimensionless product yang paling berpengaruh terhadap nilai Qo adalah ... yang mencapai 11,53%.
Pengaruh Jenis Asam dalam Isolasi Gelatin dari Kulit Ikan Nila (Oreochromis niloticus) terhadap Karakteristik Emulsi Suryanti Suryanti; Djagal Wiseso Marseno; Retno Indrati; Hari Eko Irianto
agriTECH Vol 37, No 4 (2017)
Publisher : Faculty of Agricultural Technology, Universitas Gadjah Mada, Yogyakarta, Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (592.691 KB) | DOI: 10.22146/agritech.13025

Abstract

The isolation of gelatin from nila fish (Oreochromis niloticus) skin with two types of acid (acetic acid 0,10 M and citric acid 0,05 M) was carried out on the characteristics of the emulsion to know the ability of gelatin as an emulsifier. The observation has been made for gelatin including native molecule weight with non-SDS PAGE (polyacrylamide gel electrophoresis), pH, isoelectric point, and amino acid content. The characteristics of emulsion were analysed for the emulsion properties (activity and stability), viscosity, particle size, microstructure, and zeta potential. The concentrations of gelatin used in the formation of the emulsion were 0%, 0.5%, 1.0%, 2.0%, and 3.0% with soybean oil ratio was 3:1 (v/v). The results showed that the molecular weight of native gelatin from acetic acid 0.10 M was > 260 kD, whereas from citric acids 0.05 M was 260 kD. The isoelectric point of both gelatin was at pH 8.5 whereas the pH of gelatin obtained using acetic acid 0.10 M was 5.35 and citric acid 0.05 M was 4.33. The level of lipophilic amino  acid was higher than hydrophilic amino acid with the highest amount was glycine. The emulsifying properties of gelatin obatined from both acids reached the highest value of EAI (Emulsion Activity Index) at a concentration of 0.5% which decreased with the increasing of concentration. In contrary, the value of ESI (Emulsion Stability Index) and viscosity increased with the increasing of concentration. The particle size and microstructure of gelatin emulsion with acetic acid 0.10 M were greater than those with citric acid 0.05 M at the same concentration and showed to increase with the increasing of concentration. Zeta potentials of both gelatin were positive charge at all concentrations which increased with the increasing of concentration. ABSTRAKIsolasi gelatin dari kulit ikan nila (Oreochromis niloticus) dengan dua jenis asam (asam asetat 0,10 M dan asam sitrat 0,05 M) terhadap karakteristik emulsi telah dilakukan untuk mengetahui kemampuan gelatin sebagai emulsifier. Pengamatan terhadap gelatin meliputi berat molekul native dengan non-SDS PAGE (polyacrylamide gel electrophoresis), titik isoelektrik, pH dan asam amino. Pengamatan terhadap karakteristik emulsi meliputi sifat (aktivitas dan stabilitas), viskositas, ukuran partikel, dan mikrostruktur emulsi serta zeta potensial. Konsentrasi gelatin yang digunakan dalam pembentukan emulsi yaitu 0%, 0,5%, 1,0%, 2,0%, dan 3,0% dengan menambahkan minyak kedele pada rasio 3:1 (v/v). Hasil penelitian menunjukkan berat molekul gelatin native dari asam asetat 0,10 M adalah > 260 kD sedangkan dari asam sitrat 0,05 M sebesar 260 kD. Titik isoelektrik kedua gelatin pada pH = 8,5 sedangkan pH gelatin dari asam asetat 0,10 M sebesar 5,35 dan dari asam sitrat 0,05 M sebesar 4,33. Kandungan asam amino lipofilik dari kedua gelatin lebih banyak daripada asam amino hidrofilik dengan kandungan yang terbesar adalah glisin. Sifat emulsi gelatin dari kedua proses asam tersebut memiliki nilai EAI (Emulsion Activity Index) tertinggi pada konsentrasi 0,5%, yang semakin menurun dengan semakin meningkatnya konsentrasi. Sebaliknya nilai ESI (Emulsion Stability Index) dan viskositas emulsi semakin meningkat dengan semakin meningkatnya konsentrasi. Ukuran partikel droplet dan mikrostruktur emulsi gelatin dari proses asam asetat 0,10 M lebih besar daripada proses asam sitrat 0,05 M pada konsentrasi yang sama dan menunjukkan peningkatan dengan semakin meningkatnya konsentrasi. Zeta potensial kedua gelatin bernilai positif pada semua konsentrasi dan meningkat dengan semakin besarnya konsentrasi.
Pemodelan Daerah Tangkapan Air Waduk Keliling dengan Model SWAT Teuku Ferijal; Siti Mechram; Dewi Sri Jayanti; Purnama Satriyo
agriTECH Vol 35, No 1 (2015)
Publisher : Faculty of Agricultural Technology, Universitas Gadjah Mada, Yogyakarta, Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (238.092 KB) | DOI: 10.22146/agritech.13037

Abstract

This study aimed to model watershed area of Keliling Reservoir using SWAT model. The reservoir is located in Aceh Besar District, Province of Aceh. The model was setup using 90m x 90m digital elevation model, land use data extracted from remote sensing data and soil characteristic obtained from laboratory analysis on soil samples. Model was calibrated using observed daily reservoir volume and the model performance was analyzed using RMSE-observations standard deviation ratio (RSR), Nash-Sutcliffe efficiency (NSE) and percent bias (PBIAS). The model delineated the study area into 3,448 Ha having 13 subwatersheds and 76 land units (HRUs). The watershed is mostly covered by forest (53%) and grassland (31%). The analysis revealed the 10 most sensitive parameters i.e. GW_DELAY, CN2, REVAPMN, ALPHA_BF, SOL_AWC, GW_REVAP, GWQMN, CH_K2 and ESCO. Model performances were categorized into very good for monthly reservoir volume with ENS 0.95, RSR 0.23, and PBIAS 2.97. The model performance decreased when it used to analyze daily reservoir inflow with ENS 0.55, RSR 0.67, and PBIAS 3.46.ABSTRAKPenelitian ini bertujuan untuk untuk memodelkan daerah tangkapan air Waduk Keliling dengan menggunakan Model SWAT. Waduk Keliling terletak di Kabupaten Aceh Besar, Propinsi Aceh. Dalam penelitian ini Model SWAT dikembangkan berdasarkan data digital elevasi model resolusi 90 m x90 m, tata guna lahan yang diperoleh dari intepretasi citra satelit dan data soil dari hasil analisa sampel tanah yang diperoleh di daerah penelitian. Model dikalibrasi dengan data volume waduk dan kinerja model dianalisa menggunakan parameter rasio akar rata-rata kuadrat error dan standard deviasi observasi (RSR), efesiensi Nash-Sutcliffe (NSE) dan persentase bias (PBIAS). Hasil deleniasi untuk daerah penelitian menghasilkan suatu DAS dengan luas 3,448 Ha dan memiliki 13 Sub DAS yang dikelompokkan menjadi 76 unit lahan. Sebagian besar wilayah study ditutupi oleh hutan (53%), dan pandang rumput (31%). Hasil analisa menunjukkan bahwa 10 parameter model yang sangat mempengaruhi debit adalah GW_DELAY, CN2, REVAPMN, ALPHA_BF, SOL_AWC, GW_REVAP, GWQMN, CH_K2 dan ESCO. Kinerja model sangat baik dalam memprediksikan volume tampungan waduk bulanan dengan nilai ENS 0,95, RSR 0,23, dan PBIAS 2,97. Namun, kinerja model menurun ketika mensimulasikan debit inflow harian dengan nilai-nilai ENS 0,55, RSR 0,67, dan PBIAS 3,46.
Identifikasi Perubahan Iklim Berdasarkan Data Curah Hujan di Wilayah Selatan Jatiluhur Kabupaten Subang, Jawa Barat Dyah Susilokarti; Sigit Supadmo Arif; Sahid Susanto; Lilik Sutiarso
agriTECH Vol 35, No 1 (2015)
Publisher : Faculty of Agricultural Technology, Universitas Gadjah Mada, Yogyakarta, Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (423.405 KB) | DOI: 10.22146/agritech.13038

Abstract

Indonesian region is strongly influenced by the monsoon climatic conditions have obvious difference between wet season and dry season. Climate variability and extreme climate phenomenon that often happens lately caused climate change. Climate change is characterized by changes in rainfall patterns and its causes shifting early in the season that make it difficult to plan cultivation. It is therefore necessary to study the behavior of the climate through rainfall time series analysis. Statistical tests performed using the F test and t test. This study aims to identify climate change through pattern trends, distribution and similarity of rainfall data at different timescales, using rainfall data rainy season (October to March) and the dry season (April to September) year period from 1975 to 2012. Data obtained from 6 (six) graduated rainfall stations around the study site those are Kalijati, Curugagung, Cinangling, Dangdeur, Subang and Pegaden. Data are grouped in 10-year period with a 4-year timing differences in accordance with the rules of the moving average. The period 1975 -1984 was indicated as an initial period as a basis to look for changes in rainfall patterns that occur. F test shows there has been a change in the distribution of rainfall in every period than normal period. T test showed there has been a change in the pattern of rainfall in the dry season period from 1987 to 1996. While the rainy season is starting to look at the period from 1995 to 2004. Rainy season and the dry season period (1995-2004) shows a similar pattern with the normal period (1975 -1984) so that it is possible in a certain period of climate change on the location of the cycle is approaching normal conditions.ABSTRAKWilayah Indonesia sangat dipengaruhi oleh kondisi iklim monsun yang mempunyai perbedaan yang jelas antara musim basah dan musim kering.Variabilitas iklim dan adanya fenomena iklim ekstrim yang sering terjadi akhir akhir ini menyebabkan terjadinya perubahan iklim. Perubahan iklim ditandai adanya perubahan pola curah hujan yang menyebabkan terjadinya pergeseran awal musim tanam sehingga sulit membuat perencanaan budidaya tanaman. Oleh karena itu perlu dilakukan kajian prilaku iklim melalui analisis deret waktu curah hujan.Uji statistik dilakukan dengan menggunakan uji F dan uji t. Penelitian ini bertujuan untuk mengidentifikasi terjadinya perubahan iklim melalui pola kecenderungan, distribusi dan kesamaan data curah hujan pada rentang waktu yang berbeda, menggunakan data curah hujan musim hujan (Oktober – Maret) dan musim kemarau (April – September) periode tahun 1975 – 2012. Data diperoleh dari 6 stasiun penakar curah hujan di sekitar lokasi penelitian yaitu stasiun Kalijati, Curug agung, Cinangling, Dangdeur, Subang dan Pegaden. Data dikelompokkan dalam periode 10 tahunan dengan beda waktu 4 tahun sesuai dengan aturanmovingaverage. Periode tahun 1975 -1984 menjadi periode awal sebagai dasar untuk melihat perubahan pola curah hujan yang terjadi. Uji F menunjukkan telah terjadi perubahan distribusi curah hujan disetiap periode dibanding periode normalnya. Uji t menunjukkan telah terjadi perubahan pola curah hujan musim kemarau sejak periode tahun 1987 – 1996. Sedangkan musim hujan mulai terlihat pada periode tahun 1995 – 2004. Musim hujan dan musim kemarau periode (1995-2004) menunjukkan pola yang sama dengan periode normal (1975-1984) sehingga dimungkinkan pada periode tertentu siklus perubahan iklim pada lokasi ini mendekati kondisi normal.
Wastewater Treatment for African Catfish (Clarias gariepinus) Culture by Using Anaerobic Process Darwin Darwin; Sarbaini Sarbaini; Satria Purwanto; Fatwa Dhiauddin; Muhammad Ilham; Afrizal Fazil
agriTECH Vol 37, No 4 (2017)
Publisher : Faculty of Agricultural Technology, Universitas Gadjah Mada, Yogyakarta, Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (405.531 KB) | DOI: 10.22146/agritech.13058

Abstract

This study aimed to set up an anaerobic treatment system for the treatment of wastewater derived from the farming of African Catfish (Clarias gariepinus). In this current study, anaerobic treatment of wastewater derived from the African catfish (Clarias gariepinus) aquaculture was conducted in semi-continuous reactor as well as batch reactor under mesophilic condition at 35 °C. The results revealed that the semi-continuous reactors generated higher biogas yield (69.27 mL/g VS) compared with batch reactor (22.81 mL/g VS). High conversion rate of anaerobic treatment process operated in semi-continuous reactor was also represented in higher percentage of COD removal (82.6%) compared with batch reactor which was only 62.76%. After conducting anaerobic treatment process on the wastewater derived from the catfish aquaculture, some parameters including total dissolved solids (TDS), Phosphorous (P), potassium (K) and electrical conductivity (Ec) increased in both batch and semi-continuous reactors. Batch reactors showed TS, VS and COD reduced from 0.23%, 42.88% and 1440 mg/L to 0.137 ± 0.024%, 22.78 ± 19.44% and 536.32 ± 11.27 mg/L, respectively. The results obtained from semi-continuous reactor revealed that TS, VS and COD reduced from 0.23%, 42.88% and 1440 mg/L to 0.219%, 24.353% and 250.61 mg/L, respectively. This study is highly significant for the environmental protection system.  
Fraksinasi dan Identifikasi Senyawa Volatil Asap Cair Cangkang Sawit Muhammad Halim; Purnama Darmadji; Retno Indrati
agriTECH Vol 25, No 3 (2005)
Publisher : Faculty of Agricultural Technology, Universitas Gadjah Mada, Yogyakarta, Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (1977.889 KB) | DOI: 10.22146/agritech.13345

Abstract

Palm kernel shell is one residue material of oil palm process industry. Total palm kernel shell were sufficient and could be processed into liquid smoke. The liquid smoke has been found to contain compounds functioning as smoky product improvement. This research was to identify volatile compound components existing in the liquid smoke of pabn kernel shell. This research started from liquid smoke production by pirolisa at 400 °C for 90 minutes and fractionation of temperature variation <100°C(F1), 101-125°C(F2), 126-150°C(F3), 151-175°C(F4), and 176-200°C(F5). The results of fractionation were analysed for the following chemical compositions: phenol, carbonyl, acid, and pH. The volatile compound components of liquid smoke was identified using GC-MS. The result of research indicated that F2 had highest content was 82.26%. The content of phenol, carbonyl, and acid of liquid smoke were 3.86%, 12.48%, and 12.41% respectively. The results of fractionation of phenol content low in F1 increased to F5 of 0.73%. The content of carbonyl was lower and the lowest in F5 was 3.61%. The content of acid was higher and the highest in F5 was 63.81% along with pH of liquid smoke (F0) of 3.29 and more acidy in F5 of 2.69. The result of GC-MS indicated that the liquid smoke consisted of at least 14 high components. Some of them were phenol, 2-methoxy 4-methyl phenol, 2-furan carboxaldehyde, 1,2-benzenediol, 2-methyl phenol, 4-ethyl 2-methoxy phenol, 1,2,3-trimethoxy phenol, 3-methoxy 1,2-benzenediol, 3-methyl 1,2-cyclopentanedione, 1,2,3-trimethoxy 5-methyl benzene, dan 2,3-penthanedione
Aktivitas Antioksidan Ekstrak Aloe vera sebagai Penangkal Radikal Dewi Y.S.K.; Tranggono Tranggono; Sri Raharjo; Pudji Hastuti
agriTECH Vol 25, No 3 (2005)
Publisher : Faculty of Agricultural Technology, Universitas Gadjah Mada, Yogyakarta, Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (1607.168 KB) | DOI: 10.22146/agritech.13346

Abstract

Antiradical activity of Aloe vera extracts was studied in vitro systems. Cloudy and Clarified of Aloe vera extracts exhibited marked activity on inhibition of linoleic acid peroxidation. At a concentration of 0,15 mg, Cloudy extracts exhibited higher antioxidant activity (60,16 %) than Cloudy extracts (53,30 %). Moreover, the antioxidant activity of Clarified extracts was increased affected by the concentation in the system. Increasing the concentration of Cloudy extracts up to 0,60 mg in the system did nor alter of antoxidant activity (P 50,05). Increasing' of the concentration of activated carbon (0,00 to 0,50 % and 1,00 to 2,00 %) used for clarification of Aloe vera was produced significanly decrease in scavenging 1,1-dipheny1-2- pictylhydrazyl (DPPH) free radical activity. Scavenging of free radical activity of Cloudy extracts was not affected by the concentration of extract in the system. Increasing the concentration of Clarifed Aloe vera extracts from 2,50 mg to 5,0 mg. in liposome systems was produced significantly higher of inhibitory malondyaldehyde formation than the concentration of 0,50 mg and 1,25 mg (P :50,05). Base of these results, termination of free radical reactions in Cloudy and Clarified of Aloe vera extracts is responsible for the antioxidant activity of Aloe vera extracts.
Aktivitas Antioksidan Ekstrak Buah Mengkudu (Morinda citrifolia, L) Abdul Rohman; Sugeng Riyanto
agriTECH Vol 25, No 3 (2005)
Publisher : Faculty of Agricultural Technology, Universitas Gadjah Mada, Yogyakarta, Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (3043.057 KB) | DOI: 10.22146/agritech.13347

Abstract

This research aimed to determine antioxidant activity of Morinda citrifolia, L fruit extracts. Morinda citrifolia, L fruit was ground, extracted by methanol, and partitioned by using chloroform and ethyl acetate to recover extracts of methanol, chloroform and ethyl acetate respectively. These extracts were diluted to various concentrations i.e. 1, 5, and 10 %, and were determined their antioxidant activities by linoleic-thiocyanate method. The result showed that extracts of Morinda citrifolia, L fruit had antioxidant activity in the order of ethyl acetate extract > chloroform extract > methanol extract. Antiradical activity tests were carried out by using DPPH (2,2-dipheny1-1-piaylhydrazil) method, the results showed that ethyl acetate extract, chloroform extract, and methanol extract revealed IC50 46,7, 227,7 and 888,6 pg/ml, respectively.
Potensi Daun Kemangi (Ocimum basilicum Linn) sebagai Penangkal Radikal Bebas DPPH (2,2-Diphenyl-l-pycrylhidrazil radical) Paini Sri Widyawati
agriTECH Vol 25, No 3 (2005)
Publisher : Faculty of Agricultural Technology, Universitas Gadjah Mada, Yogyakarta, Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (1935.875 KB) | DOI: 10.22146/agritech.13349

Abstract

The commercial development of plants as sources of natural antioxidant to enhance health and food preservation is of current interest. It is related to phenolic compounds containing in foods and beverages to prevent many diseases. The natural antioxidant is more safety than the synthetic antioxidant such as TBHQ (tether butylated hydroxyquinone), BHT (butylated hydroxytoluene) and BHA (butylated hydroxyanisole). Basil (Ocimum basilicum Linn) contains a wide range of essential oils and is rich in phenolic compounds. These can be extracted by two methods i.e. soxhlet and hydrodistilation. The ethanolic extracts are resulted by soxhlet and essential oils are extracted by hydrodistilation. The oils are analyzed by gas chromatography to know the phenolic compound contents. The spectra are identified by standard compounds i.e. eugenol and linalool. These compounds are used because these are the dominant phenolic compounds in basil. The result showed that linalool spectrum is found in peak number 7 with 6,5 time retention. Total phenolics analysis showed that the highest concentration of them in the ethanolic extracts is 0,25 mg/g sample and in the essential oil is 5,20 mg/g essential oil. The DPPH (2,2-Dipheny1-1-pycrylhidrazil radical) free radical scavenging activity of the ethanolic extracts and the essential oil is tested and compared with I3-carotene and TBHQ. The result showed that the DPPH free radical scavenging activity of these antioxidant is in the order of [1-carotene > essential oil > ethanolic extracts > TBHQ respectively

Page 52 of 140 | Total Record : 1392

 50   51   52   53   54 

Filter by Year

1980 2026


Reset
Filter By Issues
All Issue Vol 46, No 1 (2026) Vol 45, No 3 (2025) Vol 45, No 2 (2025) Vol 45, No 1 (2025) Vol 44, No 4 (2024) Vol 44, No 3 (2024) Vol 44, No 2 (2024) Vol 44, No 1 (2024) Vol 43, No 4 (2023) Vol 43, No 3 (2023) Vol 43, No 2 (2023) Vol 43, No 1 (2023) Vol 42, No 4 (2022) Vol 42, No 3 (2022) Vol 42, No 2 (2022) Vol 42, No 1 (2022) Vol 41, No 4 (2021) Vol 41, No 3 (2021) Vol 41, No 2 (2021) Vol 41, No 1 (2021) Vol 40, No 4 (2020) Vol 40, No 3 (2020) Vol 40, No 2 (2020) Vol 40, No 1 (2020) Vol 39, No 4 (2019) Vol 39, No 3 (2019) Vol 39, No 2 (2019) Vol 39, No 1 (2019) Vol 38, No 4 (2018) Vol 38, No 3 (2018) Vol 38, No 2 (2018) Vol 38, No 1 (2018) Vol 37, No 4 (2017) Vol 37, No 3 (2017) Vol 37, No 2 (2017) Vol 37, No 1 (2017) Vol 36, No 4 (2016) Vol 36, No 3 (2016) Vol 36, No 2 (2016) Vol 36, No 1 (2016) Vol 35, No 4 (2015) Vol 35, No 3 (2015) Vol 35, No 2 (2015) Vol 35, No 1 (2015) Vol 34, No 4 (2014) Vol 34, No 3 (2014) Vol 34, No 2 (2014) Vol 34, No 1 (2014) Vol 33, No 4 (2013) Vol 33, No 3 (2013) Vol 33, No 2 (2013) Vol 33, No 1 (2013) Vol 32, No 4 (2012) Vol 32, No 3 (2012) Vol 32, No 2 (2012) Vol 32, No 1 (2012) Vol 31, No 4 (2011) Vol 31, No 3 (2011) Vol 31, No 2 (2011) Vol 31, No 1 (2011) Vol 30, No 4 (2010) Vol 30, No 3 (2010) Vol 30, No 2 (2010) Vol 30, No 1 (2010) Vol 29, No 4 (2009) Vol 29, No 3 (2009) Vol 29, No 2 (2009) Vol 29, No 1 (2009) Vol 28, No 4 (2008) Vol 28, No 3 (2008) Vol 28, No 2 (2008) Vol 28, No 1 (2008) Vol 27, No 4 (2007) Vol 27, No 3 (2007) Vol 27, No 2 (2007) Vol 27, No 1 (2007) Vol 26, No 4 (2006) Vol 26, No 3 (2006) Vol 26, No 2 (2006) Vol 26, No 1 (2006) Vol 25, No 4 (2005) Vol 25, No 3 (2005) Vol 25, No 2 (2005) Vol 25, No 1 (2005) Vol 24, No 4 (2004) Vol 24, No 3 (2004) Vol 24, No 2 (2004) Vol 24, No 1 (2004) Vol 23, No 4 (2003) Vol 23, No 3 (2003) Vol 23, No 2 (2003) Vol 23, No 1 (2003) Vol 22, No 4 (2002) Vol 22, No 3 (2002) Vol 22, No 2 (2002) Vol 22, No 1 (2002) Vol 21, No 4 (2001) Vol 21, No 3 (2001) Vol 21, No 2 (2001) Vol 21, No 1 (2001) Vol 20, No 4 (2000) Vol 20, No 3 (2000) Vol 20, No 2 (2000) Vol 20, No 1 (2000) Vol 19, No 4 (1999) Vol 19, No 3 (1999) Vol 19, No 2 (1999) Vol 19, No 1 (1999) Vol 18, No 4 (1998) Vol 18, No 3 (1998) Vol 18, No 2 (1998) Vol 18, No 1 (1998) Vol 17, No 4 (1997) Vol 17, No 3 (1997) Vol 17, No 2 (1997) Vol 17, No 1 (1997) Vol 16, No 4 (1996) Vol 16, No 3 (1996) Vol 16, No 2 (1996) Vol 16, No 1 (1996) Vol 15, No 4 (1995) Vol 14, No 3 (1994) Vol 14, No 2 (1994) Vol 14, No 1 (1994) Vol 13, No 4 (1993) Vol 13, No 3 (1993) Vol 13, No 2 (1993) Vol 13, No 1 (1993) Vol 12, No 4 (1992) Vol 12, No 3 (1992) Vol 12, No 2 (1992) Vol 12, No 1 (1992) Vol 11, No 4 (1991) Vol 11, No 3 (1991) Vol 11, No 2 (1991) Vol 11, No 1 (1991) Vol 10, No 4 (1990) Vol 10, No 3 (1990) Vol 10, No 2 (1990) Vol 10, No 1 (1990) Vol 9, No 4 (1989) Vol 9, No 3 (1989) Vol 9, No 2 (1989) Vol 9, No 1 (1989) Vol 8, No 4 (1988) Vol 8, No 3 (1988) Vol 8, No 2 (1988) Vol 8, No 1 (1988) Vol 7, No 2 (1987) Vol 7, No 1 (1987) Vol 6, No 1 & 2 (1986) Vol 5, No 1 & 2 (1985) Vol 4, No 2,3, & 4 (1984) Vol 4, No 1 (1984) Vol 3, No 3 (1982) Vol 3, No 1 (1982) Vol 2, No 4 (1981) Vol 2, No 3 (1981) Vol 2, No 2 (1981) Vol 2, No 1 (1981) Vol 1, No 3 (1980) Vol 1, No 2 (1980) Vol 1, No 1 (1980) More Issue