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STUDI PENGARUH PENGENDALI ATC TERHADAP KOMPONEN TEKNOLOGI DALAM SISTEM ATC Tranggono, Tranggono; Rusindiyanto, Rusindiyanto
Jurnal Ilmiah Dinamika Teknik DINAMIKA TEKNIK VOL. 12 NO. 1 JANUARI 2019
Publisher : Jurnal Ilmiah Dinamika Teknik

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Abstract

Air Traffic Controller is one profession with special and complex level of expertise. This is because an ATC controller has activities that involve mindset, communication, decision making, interaction and relationships between human-computers that are vulnerable to errors. And it has a very high risk because it deals with the safety of many people. The task of an ATC controller is to maintain a safe distance between planes that have variations with the density of traffic and airspace. This study aims to determine the relationship between ATC (humanware) controllers and technological components in ATC systems, among others: Organization (orgaware), software (infoware) and equipment / machinery (technoware) of ATC equipment. To identify and know the relationship between variables, with Partial Least Square (PLS). Based on the t-statistical value, obtained significant influential factors indicating the existence of a relationship between the ATC controller (humanware) and other system components (infoware, orgaware, and technoware).
Evaluasi Sensoris Odor Bubuk Merica Hitam (Pipernigrum L) selama Penyimpanan dengan Olfaktometer Statik Utami, Indyah Sulistya; Tranggono, Tranggono; Hastuti, Pudji
Agritech Vol 25, No 4 (2005)
Publisher : Faculty of Agricultural Technology, Universitas Gadjah Mada, Yogyakarta, Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (1113.552 KB) | DOI: 10.22146/agritech.9448

Abstract

The purpose of the study was to enhance objectivity of sensory evaluation by static olfactometry of black pepper powder odor. Five trained assessors evaluate periodically the odor of black pepper powder stored at 50°C during 30 days by test tube and static olfactometry.. Individual repeatability of assessors was higher by static olfactometry than by the test tube. The group perfomed better in discriminating odor character changes using static olfactometry than test tube. They were able to detect an unfamiliar odor but unable to describe it as indicated by the low reproducibility. It follows that static olfactometry can be use as a tool to discriminate black pepper powder character odor changes.
Perubahan Aktivitas Antioksidan, Kadar Antosianin dan Polifenol pada Beberapa Tingkat Kemasakan Buah Duwet (syzygium Cumini) Lestario, Lydia Ninan; Suparmo, Suparmo; Raharjo, Sri; Tranggono, Tranggono
Agritech Vol 25, No 4 (2005)
Publisher : Faculty of Agricultural Technology, Universitas Gadjah Mada, Yogyakarta, Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (878.891 KB) | DOI: 10.22146/agritech.9444

Abstract

Research on antioxidant activity, anthocyanin, and polyphenol contents of Java plum (Syzygium cumini) from several stages of maturity was carried out with three aims: to prove that the fruit contain anthocyanins; to compare antioxidant activity from three stages of fruit maturity; and to examine the possible correlation between maturation and antioxidant activity, anthocyanin and polyphenol contents. The fruit pulp was separated from the seed, frozen dried, and kept in freezer. The freezer dried fruit was extracted (macerated) with methanol-HCl 1% for overnight at 4ºC, and filtered with Whatman no 1 to obtain fruit extract. Anthocyanin-betacyanin testing was used to indicate that the fruit contain anthocyanin. Antioxidant activity test was conducted with ferri-thiocyanate method in linoleic acid emulsion system. Anthocyanin contents was determined with pH differential method, while its polyphenol with spectrophotometric method with Folin-CIocalteu reagent. The result showed that the fruit contained anthocyanin, ranging from 1,68 mg/g at young stage (green) to 29,39 mg/g at overripe stage (black), and showed that antioxidant activity was influenced by fruit maturity. With regard to fruit maturoty, the antioxidant activity of purple, red, adn green fruit were 64,75%, 62,42%, and 29,86% respectively; whereas that of BHT was 79,45%. It was noted that there were significant correlation between the level of anthocyanins, poluphenols, and the degrees of maturity. As the fruit maturity increased, the anthocyanin increased, but the polyphenol decreased. The fruit contained considerable amount of anthocyanins and had antioxidant activity that was influenced by stages of maturity. It was indicated that the more mature the fruit the higher anthocyanins and the lower polyphenols concentrations.
Sintesis Ester Sorbitol Oleat Menggunakan Lipase dari Getah Pepaya, Candida rugosa dan Rhizopus arrhizus ( Suhardi, Suhardi; Tranggono, Tranggono; Hastuti, Pudji; Muchalal, M.
Agritech Vol 26, No 3 (2006)
Publisher : Faculty of Agricultural Technology, Universitas Gadjah Mada, Yogyakarta, Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (1861.677 KB) | DOI: 10.22146/agritech.9591

Abstract

The ability of  lipase from Carica papaya latex, Candida rugosa and Rhizopus arrhizus to catalyze esterification of sorbitol and oleic acid to produce Sorbitol Oleat Esters (SOE) was investigated in this study. Response Surface Methodology (RSM) was employed to evaluate the effects of temperature (x1 =40-50oC), reaction time (x2=24-72 hours), concentration of enzyme (x3=25-75 units),  on percentage molar conversion as well as to determine the optimum condition of this reaction in term of this factors. Based on RSM analysis using  lipase from Carica papaya latex, the optimum synthesis conditions that giving 58.31% molar conversion, were : temperature of 45.15oC, reaction time  51.73  hours, concentration of enzyme 37 units. Using lipase from Candida rugosa , the optimum synthesis conditions that giving 59.49 % molar conversion, were : temperature of 45.08oC, reaction time  53.42 hours, concentration of enzyme 75 units.  Using lipase from Rhizopus arrhizus, the optimum synthesis conditions that giving 61.89 % molar conversion, were : temperature of 45.01oC, reaction time  61.68 hours, concentration of enzyme 66 units.  The characteristics of SOE products using lipase from Carica papaya latex and Rhizopus arrhizus were degree of esterification (DE) 1 and (DE) 2,  hydrophilic lypophilic balance 7.5-8.0, and surface tension  34.8-35.1 dyne/cm. SOE products using lipase from Candida rugosa were DE 1, DE 2, and DE 3, hydrophilic lypophilic balance 3-6, and surface tension  31.18-31.83 dyne/cm. and capable to maintain emulsion of water in oil.
ANALISA HUMAN ERROR PADA KARYAWAN PRODUKSI BARECORE MENGGUNAKAN METODE HUMAN RELIABILITY ASSESSMENT (HRA) Ngatilah, Yustina; Pudji W, Endang; Rochmoeljati, Rr; Tranggono, Tranggono
Tekmapro : Journal of Industrial Engineering and Management Vol 14 No 1 (2019): TEKMAPRO
Publisher : UPN Veteran Jawa Timur

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (182.462 KB) | DOI: 10.33005/tekmapro.v14i1.24

Abstract

Seluruh industri pasti memiliki keinginan untuk memiliki zero accident. Namun pada kenyataannya banyak perusahaan yang memiliki angka kecelakaan yang tinggi tiap tahunnya. Human Reliability Assessment merupakan salah satu metode untuk memberi usulan alternatif pengurangan terhadap kecelakaan kerja yang terjadi. Dimana langkah yang digunakan yakni mengumpulkan data kecelakaan kerja,data Task Analysis Sistem dan data identifikasi kegagalan. Pengolahan yang dilakukan yakni dengan penggambaran kecelakaan kerja menggunakan Fault Tree Analysis,kemudian kuantifikasi nilai Human Error Probability dengan metode Human Error And Reduction Technique dan pada akhirnya akan ditemukan usulan alternatif pengurangan kecelakaan kerja. Hasil dari penelitian ini adalah mengidentifikasi kesalahan manusia yang menimbulkan kecelakaan kerja. Kesalahan karyawan tersebut antara lain posisi pemotongan kurang benar dengan probabilitas tertinggi yaitu 0,728, untuk yang lain seperti gagal memposisikan saat pengambilan material, salah posisi dalam melakukan prosedur,tidak fokus dalam melakukan proses,tidak memperhatikan posisi kayu dan terburu-buru dalam melakukan prosedur probabilitasnya dibawah 0,728.
Sintetis secara Semi Kontinyu Biosurfaktan Ester Sorbitol Oleat Menggunakan Lipase Getah Pepaya Imobil Suhardi, Suhardi; Tranggono, Tranggono; Hastuti, Pudji; Muchalal, M.
Agritech Vol 26, No 1 (2006)
Publisher : Faculty of Agricultural Technology, Universitas Gadjah Mada, Yogyakarta, Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (450.46 KB) | DOI: 10.22146/agritech.9466

Abstract

Study on synthesis of sorbitol oleiate ester biosurfactan using Carica papaya latex immobilized-hpase as catalyst was caned out using oleic acid as a raw material. In the first step, process optimization for biosurfactan production was done with Carica papaya latex immobilized-lipase as acatalyst using a semi continuous methods. Lipase from Carica papaya latex was extracted using phosphate buffer pH 7.3 containing NaCI 0.1M then precipitated with addition of ammonium sulphate. Furthermore, the precipitated enzyme was solubilized in phosphate buffer pH 7.3, immobilized on Na-alginat (3%) and dried in freeze drier. Some variables for reaction were studied consisting of water concentration (20, 40, 60%), silica gel (0, 60, 120%) and reaction time (24,48,72 hours) with lipase concentration of 10%, and incubated at 45°C for those determined times and the acid value was monitored. In the second step, production of biosurfactant was also carried out using the semi-continuous methods, oleic acid and sorbitol were used as reactans and immobilzed-lipase of Carica papaya latex as a catalyst. Product fungsional properties were also determined including hydroxyl value, refraction index, melting point, fatty acid composition and HLB ( hydrophylic-lipophylic balance) value, surface tension and emulsifier characteristics. Result showed that : semi continuous production of sorbitol fatty acid ester with feed rate 0.1 ml per minute, temperature 45°C, 10% immobilized-lipse of Carica papaya latex, water: sorbitol ratio (40.16%), silica gel: water ratio (63.66%), sorbitol : oleic acid ratio (1:3 mol), incubation time 41.37 hours, resulted 54.96% product. The product characteristics were as follows : sorbitol oleiate acid ester content 70%, rendement 60%, hydroxil value 57 mg KOH/g, melting point 165°C, refractive index 1.4590, HLB value 7.5, surface tension 31.83 dyne/cm, capacity to keep emulsion (W/O) stability 140 minutes.
Aktivitas Peroksida dan Profil Senyawa Flavor Selama Pemeraman Buah Mangga Pasca Penyimpanan Suhu Rendah Tranggono, Tranggono
Agritech Vol 19, No 4 (1999)
Publisher : Faculty of Agricultural Technology, Universitas Gadjah Mada, Yogyakarta, Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (1731.211 KB) | DOI: 10.22146/agritech.13716

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Pembuatan dan Karakterisasi Minyak Goreng Rendah Kalori Xilitol Poliester Suhardi, Suhardi; Tranggono, Tranggono; Supranto, Supranto; Hastuti, Sri
Agritech Vol 21, No 3 (2001)
Publisher : Faculty of Agricultural Technology, Universitas Gadjah Mada, Yogyakarta, Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (1418.4 KB) | DOI: 10.22146/agritech.13589

Abstract

Xilitol poliester was produced by esterification involving xilitol and fatty acid metil ester (FAME) from DALMS (destilate fatty acid from palm oil). The reaction was affected by : reaction time, temperature and reactant molar ratio. Optimum condition based on response surface methodology (RSM) analysis was as follows : reaction time 6,78 h, reaction temperature 144,5ºC, substrate molar ratio 10, 3:1 and convertion of xilitol poliester 86,4%. Xilitol poliester produced was composed of short chain fatty acid. The physical properties of xilitol poliester (smoke point, melting point, refractive index, spesific gravity and viscosity) were little bit lower than those of palm oil. Analysis of hydrophilic lipophilic balance showed that xilitol poliester may be used as emulsifier. Hydrolitie activity of pancreatic lipase to xilitol poliester lower than that of palm oil. Perokside value of xilitol poliester was lower than that of palm oil.
Aktivitas Antioksidan Ekstrak Aloe vera sebagai Penangkal Radikal Y.S.K., Dewi; Tranggono, Tranggono; Raharjo, Sri; Hastuti, Pudji
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.
Sifat Antioksidatif Ekstrak Buah Duwet (Syzygium cumini) Lestario, Lydia Ninan; Hastuti, Pudji; Raharjo, Sri; Tranggono, Tranggono
Agritech Vol 25, No 1 (2005)
Publisher : Faculty of Agricultural Technology, Universitas Gadjah Mada, Yogyakarta, Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (2909.677 KB) | DOI: 10.22146/agritech.13374

Abstract

A research on Java plum (Syzygium cumini) fruit as source of natural antioxidant has been done with special emphasis on the role of anthocyanins. The aims of this research were : to determine the extraction condition which include types of solvents, length of time, and temperature of extractions. The solvents combination consisted of : methanol-HC1 1%; acetone; acetone-water (7:3); and water, which were applied for 4, 8, 12 hours extractions at room (27-29°C) and cool room (4°C) temperatures. The results showed that methanol-HCI I% gave highest extract of anthocyanins and polyphenols and antioxidant activity as compared to acetone, acetone-water (7:3), and water. Higher antioxidant activity and anthocyanin content were resulted from extraction in 4°C compared to room temperature; whereas higher polyphenol content were obtained from extraction at room temperature compared to cool room temperature. The length of extraction time. did not give significant differences in antioxidant activity, anthocyanin and polyphenol content. With regard to methanol-HC1 1% extract, there was a sienificant correlation between anthocyanin level and antioxidant activity (Y= 12,20 X + 84,40 ; r=0,900), and nonsignificant correlation between polyphenol content and antioxidant activity (Y= -0,92 X + 144 ; r=-0,805) (r table = 0,811); These facts indicated that the anthocyanin had a high antioxidant activity.Key words: Syzygium cumini, antioxidant activity, anthocyanin, polyphenol.