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Journal : Jurnal Agritech

Penerapan Alat Pengepres Ampas Tahu untuk Pengrajin Tempe Gembus Sentra Industri Tahu "Ngudi Lestari" Srandakan, Bantul Suyantohadi, Atris; Supartono, Wahyu; Suryandono, Agustinus
Agritech Vol 20, No 1 (2000)
Publisher : Faculty of Agricultural Technology, Universitas Gadjah Mada, Yogyakarta, Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.22146/agritech.13709

Abstract

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Life Cycle Assessment untuk Produk Ikan Laut di Kabupaten Gunungkidul Supartono, Wahyu
Agritech Vol 22, No 2 (2002)
Publisher : Faculty of Agricultural Technology, Universitas Gadjah Mada, Yogyakarta, Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.22146/agritech.13571

Abstract

Life Cycle Assesment (LCA) is one method to assess enviromental aspects and potential effect due to a product or service. This method was conducted by compilation and analysis on input and output data in the system, evaluation on potential effect on enviroment based on the input and output, interpretation of the compilation results and analysis on effects due to the aim of the LCA. This research was intended to find the LCA of sea fishes, ehich were caught and sold in Baron, Drini and Ngrenehan beaches in Gunung Kidul. Other aims were to know the potency of fish products and to evaluate the effects on enviroment if the fishes were processed into the foods. The samples were fresh fish, fried fish and barbequed fish. Results of the research depicted that, catching 1 kg fresh fish was needed 3600 kcal human energy; 7,47 MJ for fuel and produces CO2 0.385 mg, SO2 0.116 mg, NOx 0.0743 mg dan partikel polutan 0.0107 mg. The result of microbiological test showed, value of Total Plate Count lied between 105 to 108. But the results of microbiological tests depicted, that all samples were negative from presence of E.coli, Staphylococcus sp and Salmonella sp (except fresh fish from Baron showed positif contamination of E.coli).
Analisa Faktor yang Berpengaruh terhadap Permintaan Tepung Terigu oleh Industri Kecil Berbahan Baku Tepung Terigu di Daerah Istimewa Yogyakarta H., Saptati Nurul; Supartono, Wahyu; Mulyati, Guntarti Tatik
Agritech Vol 21, No 2 (2001)
Publisher : Faculty of Agricultural Technology, Universitas Gadjah Mada, Yogyakarta, Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.22146/agritech.13604

Abstract

This research was conducted to identify all influencing factors of wheat flour demand of industries, which used wheat flour as main raw material. Samples of this research were five noodle industries and ten sweet cake industries in Yogyakarta municipality. Dependent variable influencing to wheat flour demand of small scale industries were price of wheat flour, price of substitutes (rice flour and tapioca starch), industrys income, and governmental regulation for wheat flour distribution. A double regression method was used to determine the roles of each dependent variable. Result of data analysis showed, that the wheat flour demand was influenced by five factors in following equation: ... If the price of wheat flour (Pt) increased at 1%, the demand of it (Qt) decreased at 0.09%. The increase in price of rice flour (Ptb) 1% caused the increase in demand of wheat flour (Qt) for 0.124%; The increase in price of tapioca starch (Ptp) for 1% affected the increase in demand of wheat flour 0.028%; the increase of wheat flour demand of 0.427; also for cake industry increase in its income 1% caused increase in the wheat flour was stopped, the demand of wheat flour decreased. This regulation affected the declination of wheat flour demand in small-scale industry of wheat demand for 0.036.
Identification of Wheat Flour Segmentation Based on Household Consumers Preferences Erlandharosi, Ivonny; Supartono, Wahyu; Purwadi, Didik
Agritech Vol 22, No 1 (2002)
Publisher : Faculty of Agricultural Technology, Universitas Gadjah Mada, Yogyakarta, Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.22146/agritech.13573

Abstract

The aim of this study research was to indentify wheat flour segmentation based on household consumer. Samples of this research were CK, KB and SB. The research method was "Stratified Random Sampling". Respondents for questionaire were chosen from consumers who were divided into three level based on welfare society of BKKBN Yogyakarta called higher, middle and lower consumer welfare. The three different level society had different decision to buy products for their need. The segmentation due to the consumer need was needed to homogenize their needs. The result of this research showed that there was an interantion between level of societys welfare and knowledge of wheat flour utilization. It mean that the highest class level knew more about wheat flour utilization. The processed product depended on chosen brand of wheat flour, but there was not an interaction between consumer society level and the chosen product brand of wheat flour. Consumer had difference knowlegde on utilization of CK and KB. For lower and middle class level, and middle and higher class level had similar decision of wheat flour utilization. For higher and lower class level, there was difference knowledge of utilization of wheat flour KB.
Evaluasi Karkas dan Rumah Potong Ayam Lokal di Beberapa Kabupaten di Daerah Istimewa Yogyakarta dan Jawa Tengah Supartono, Wahyu; Raharjo, Sri; Iskandar, Sofyan
Agritech Vol 23, No 4 (2003)
Publisher : Faculty of Agricultural Technology, Universitas Gadjah Mada, Yogyakarta, Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.22146/agritech.13503

Abstract

Local chickens are one of national assets which need serious consideration, because they have some advantages than imported ones. These local chicken are still used as raw material for some traditional foods or ceremonies. But the quality of their carcasses was still low, so that it was needed to observe them in the practices (at the slaughtering houses and the market). The observations were conducted in some regions; Surakarta and Sukoharjo (Middle Java), Yogyakarta city, Sleman and Bantu! (Yogyakarta Special Province). This research was focussed on chemical, physical and microbiological determination on local chicken carcasses, which were sold in the market and evaluastion on slaughtering houses in the five research locations. The results depicted, the local chicken carcasess had higher protein and calorie content, lower fat content than imported ones. Based on sensory evaluation, these chicken carcasses showed good physical appearance. The results on texture and colour test depicted, there were no significant differences among the. But the microbiological test poniled out, that all samples were containinted by Escherichia coil, Staphylococcus sp and Salmonella sp. The field observation on the slaughtering houses showed, that all houses did not implement the principles of equipment lay-out, processing flow, good sanitation and waste handling and hygienic material handling.
Analisa Kualitas Layanan pada Industri Jasa Boga Inderayani, Rina; Supartono, Wahyu; Purwadi, Didik
Agritech Vol 23, No 4 (2003)
Publisher : Faculty of Agricultural Technology, Universitas Gadjah Mada, Yogyakarta, Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.22146/agritech.13504

Abstract

The growth of income, knowledge, jobs, and work places supported the existence of the food service industry to fulfill the societys need To increase the consumers satisfaction, it was needed to measure the service quality. The service quality was measured based on several variables: tangibles, responsiveness, reliability, assurance, and empathy, which ordered by SERVQUAL instruments. The research was conducted by using questionnaire which was spread out to the consumers. The research methodology was purposive random sampling. The data were analyzed by product moment correlation test and Alpha technique for reliability test. The assumption for the double regression model had to fulfill following criterias: no multicolinearity no autocorrelation, and heteroscedasticity which could be ignored. The results showed, that consumers acceptance level for service quality was high, which could be ranked as follow: reliability (highest), assurance, tangibles, responsiveness, and empathy (lowest). Double regression model for the quality service was : Y = 1.377 + 3.99x10-2X17.278x104X2– 4.673x10-2X3 + 0.118X, + 2.381x102X3, which meant variable assurance (X4) gave the highest contribution to the consumers satisfaction
Analisis Pengaruh Kepuasan Kerja terhadap Kinerja Karyawan dengan Pendekatan Kansei Engineering Perusahaan XYZ Risqi, Riza Ovita; Ushada, Mirwan; Supartono, Wahyu
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 | DOI: 10.22146/agritech.9422

Abstract

XYZ Company is an export-oriented industry which is important for them to focus on the competency of worker. Therefore, job satisfaction and workload are the important factors which influence the job performance based on the competency. This research highlighted a methodology to define the relationship between job satisfaction and performance using Kansei Engineering approach. Kansei Engineering approach is applicable to model the human sensibility factors using comparison between verbal and non-verbal parameters. The research objective is to determine the influence of job satisfaction and workload to worker performance. The workload factors were influenced by the workplace environment. Kansei words were acquired using the interview together with the video presentation as the source of worker image. A model of multiple regression analysis was developed as Kansei engineering model. The inputs were satisfaction and workload factors, while output is the worker performance. The research results indicated the correlation value of 77,5%, adjusted r square sebesar 44,1%. Research results indicated worker performance can be affected by job satisfaction and workload by 44.1%. The remained percentage of 55.9% was affected by others variable.ABSTRAKPerusahaan XYZ merupakan perusahaan yang berorientasi ekspor sehingga penting bagi perusahaan untuk dapat mempertahankan karyawan yang berkompeten dibidangnya. Salah satu cara yang dapat dilakukan perusahaan untuk mempertahankan karyawan adalah dengan menciptakan kepuasan kerja karyawan yang dapat mempengaruhi kinerja karyawan. Penelitian ini bertujuan untuk mengetahui besar pengaruh kepuasan kerja dan beban kerja terhadap kinerja karyawan Perusahaan XYZ. Beban kerja dipengaruhi oleh lingkungan kerja. Metode yang digunakan dalam penelitian adalah pendekatan Kansei Engineering. Kansei Engineering merupakan metode yang digunakan untuk mengolah nilai Kansei sebagai input menjadi atribut sistem kerja baru sebagai outputnya. Selain itu metode ini juga digunakan untuk mengetahui gap antara respon verbal dan non-verbal. Nilai Kansei diperoleh melalui wawancara yang disertai dengan pemutaran video sebagai sumber imajinasi karyawan. Hasil dari kuesioner kepuasan dan pengukuran beban kerja kemudian dianalisis menggunakan regresi berganda dengan hasil kuesioner kinerja. Input dari penelitian adalah faktor kepuasan kerja dan beban kerja, sedangkan output adalah kinerja karyawan. Hasil penelitian diperoleh nilai r square yaitu diketahui bahwa nilai korelasi model regresi linier berganda ini adalah sebesar 77,5%, sedangkan adjusted r square sebesar 44,1% menunjukkan bahwa kinerja karyawan variabel Y dapat dijelaskan oleh variabel X yang meliputi faktor fisiologis, keselamatan dan keamanan, sosial, penghargaan, aktualisasi diri, dan beban kerja sebesar 44,1%. Persentase sisanya sebesar 55,9% dijelaskan oleh variabel lainnya.
Pengendalian Pencoklatan Produk Hasil Restrukturisasi Bubur Raharjo, Sri; Suparmo, Suparmo; Supartono, Wahyu; Utama, Zaki
Agritech Vol 22, No 3 (2002)
Publisher : Faculty of Agricultural Technology, Universitas Gadjah Mada, Yogyakarta, Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.22146/agritech.13539

Abstract

Upon peeling and slicing fresh fruits are easily discolored due to enzymatic reaction in the presence of oxygen. Restructured fruit also suffer the discoloration during aerobic storage either at room temperature or under refrigeration. The objective of this study was to find alternatives for preventing or retarding the discoloration rate of calcium-alginate restructured fruits during aerobic refrigerated storage using anti browning additives. Four different fruits including avocado, mango, jack fruit, and soursop were restructured using sodium alginate (1% w/w) and calcium lactate (1% w/w). The additives tested were citric acid 0.5% (w/w), ascorbic acid 0.05% (w/w), sodium disulfite 0.01% (w/w), N-acetyl-cysteine 0.05% (w/w), and combination of citric acid 0.05% (w/w) and N-acetyl-cysteine 0.05% (w/w). Addition of anti browning additives at the specified concentration was effective in delaying the discoloration of restructured fruits during aerobic storage at 4ºC for up to 6 days. Among the additives tested the use of combination of citric acid 0.05% (w/w) and N-acetyl-cysteine 0.05% (w/w) was the most effective in retarding the discoloration across the fruits. Restructured soursop, in particular, was not undergoing significant sidcoloration for 11 days of refrigerated storage.
Analisis Preferensi Industri Kecil Berbasis Tepung Terigu terhadap Pemilihan Jenis Tepung Terigu di Kotamadya Yogyakarta Adriansyah, Didi; Supartono, Wahyu; TM, Guntarti
Agritech Vol 20, No 4 (2000)
Publisher : Faculty of Agricultural Technology, Universitas Gadjah Mada, Yogyakarta, Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.22146/agritech.13679

Abstract

In the low class of small scale wheat flour based industries, price attribute played the most important role in choosing wheat flour, followed by dough rising, accessibility, dough elasticity, flavour and colour. The medium class wheat flour based industries had different considerations - price, dough elasticity, dough rising, flavour, accessibility and colour. The price attribute had still the first consideration in choosing wheat flour in the high class of small scale industries and than followed by accessibility, dough elasticity, dough rising, flavour and colour. This research also showed, that the most preferred wheat flour brand by small scale industries base in wheat flour were Cakra Kembang (50%), Segitiga Biru (43%), Beruang Biru (2,8%), Kunci Biru (1,4%), Melati (1,4%) and Raflesia (1,4%).
Karl Fischer Titration as An Alternative Method for Determing The Water Content of Indonesian Spices Supartono, Wahyu
Agritech Vol 19, No 1 (1999)
Publisher : Faculty of Agricultural Technology, Universitas Gadjah Mada, Yogyakarta, Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.22146/agritech.22391

Abstract

Karl Fischer Titration (KFT) is a well established and effective direct primary method to determine water content in various materials. It is based on a specific chemical reaction and it differs principally from the drying and distillation methods. The KFT was introduced as an alternative method to determine the water content in some Indonesian spices (clove, coriander, ginger and white pepper), which generally contain appreciable amount of volatile compounds to distract accurate moisture. The samples used were prepared by cutting and grinding with a morser. The KFT system used was one-component reagent with methanol as working medium. The samples were introduced into a KFT titration cell and titrated directly with the KFT reagent. The extraction time of determination was 60 seconds. The determination of the water content took approximately 10-20 minutes. The distillation and drying method served as control or reference method. The distillation methods which used was a mixture of toluene and xylene 95:5 (vlv) took 2 hours. The drying method was conducted at temperature of 105°C for 3-4 hours.