Rokhani Hasbullah
Departemen Teknik Mesin dan Biosistem, Fateta Institut Pertanian Bogor Jl. Raya Darmaga Bogor Gd. Fateta IPB

Published : 59 Documents
Articles

Aktivitas antibakteri asap cair dan daya awetnya terhadap bakso ikan

Jurnal Ilmu Pertanian Indonesia Vol 14, No 1 (2009): Jurnal Ilmu Pertanian Indonesia
Publisher : Institut Pertanian Bogor

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Abstract

The study were investigated antibacterial activity of liquid smoke from coconut shell and its applications of fishball at room temperature (27-28°C) and refrigeration temperature {4±1°C). The Minimum Inhibitory Concentration (MIC) of liquid smokel against Pseudomonas aeruginosa and Staphylococcus aureus were determined using broth or agar dilution methods. liquid smoke showed bactericidal effects with P. aeruginosa than S. aureus. MIC of liquid smoke was 0.40°/o against S. aureus and 0.22°/o against P. aeruginosa. Trial in fishball, showed that boiling in 2.5% liquid smoke and storage at 27-28°C and 4±1°C were inhibited the growthof total bacteria and increased shelflife 16 hours and 8 days than no treatment (based on SNI 01-3819-1995), respectively, and retarded the increased in pH and moisture content after storage. The results indicated thatliquid smoke was an effective inhibitor of fishball spoilage.Keywords: antibacterial activity, fishball preservation, liquid smoke, MIC valueKeywords : Garlic, herbal, imunomodulator, phagocytosis, turmeric, zinc.

Kajian Keamanan Asap Cair Tempurung Kelapa untuk Produk Pangan

Jurnal Ilmu Pertanian Indonesia Vol 13, No 3 (2008): Jurnal Ilmu Pertanian Indonesia
Publisher : Institut Pertanian Bogor

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Abstract

The objective of this research was to study the food safety od coconut shell liquid smoke for food products by acute toxicity test and identification of volatile compounds by means of Gas Chromatography- Mass Spectroscopy (GC-MS).Keyword: acute tixicity, coconut shell liquid smok, food safety, GC-MS, volatile compound 

Perlakuan Uap Panas (Vapor Heat Treatmant) untuk Disinfestasi Lalat Buah dan Mempertahankan Mutu Buah Belimbing (Averrhoa carambola L.)

Jurnal Keteknikan Pertanian Vol 24, No 1 (2010): Jurnal Keteknikan Pertanian
Publisher : PERTETA

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Abstract

Abstract The objectives of this research were to study mortality of carambola fruit fly (B. carambolae D & H) and to study responses of VHT on quality of carambola (A. carambola L). Fruit fly mortality due to heat has been investigated by immersing fruit fly eggs into hot water at temperatures of 40, 43, 46 dan 49oC for 30 minutes and then at temperature of 46.5oC for 0, 5, 10, 15, 20, 25, 30 minutes. Star fruit were treated at temperature of 46.5oC for 5, 15, 30 minutes and then stored in temperatures of 5, 15oC and room temperature (28-30 oC). The result show that mortality has been achieved 100% at temperature more than 43.0oC for 30 minutes and at temperature 46.0oC for more than 15 minutes. VHT had significant influences to decrease the fruit respiration rates, chilling injury, antraknose, to increase the weight loss, color, and soluble solid content. However, there were no significant change in the hardness, water content, vitamin C and organoleptic test. VHT at temperature 46.5oC for 20 up to 30 minutes were effective to kill fruit flies inside carambola and VHT combined by storing in temperature of 15oC were able to maintain carambola quality during storage. Keywords: vapor heat treatment, fruit fly, B. carambolae, carambola, disinfestation Diterima: 1 Februari 2010; Disetujui: 19 April 2010  

Study on Disinfestation of Fruit Fly (Bactrocera dorsalis) Using Vapor Heat Treatment on Gedong Gincu Mango

Jurnal Keteknikan Pertanian Vol 23, No 1 (2009): Jurnal Keteknikan Pertanian
Publisher : PERTETA

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Abstract

Since the prohibition of chemical method for insect disinfestations processes such as ethylene dibromide in 1984, heat treatment method was developed as quarantine technology. One of the heat treatment methods is vapor heat treatment (VHT). The objectives of this research were to study mortality of fruit fly (Bactrocera dorsalis) and to study the responses of VHT on quality of gedong gincu mango. Fruit fly mortality due to heat has been investigated by immersing fruit fly eggs into heated water at temperatures of 40, 43, 46 and 49OC for 30 minutes immersed, also at temperature of 46OC for 5, 10, 15, 20, 25 and 30 minutes. Gedong gincu mangoes were treated at temperature 46.5OC for 0, 10, 20, and 30 minutes. The results showed that mortality has been achieved 100% at temperature more than and equal to 43OC for 30 minutes and attemperature 46OC for more than and equal to 10 minutes. The VHT has significantly and fungi population although without adversely affecting to the fruit quality and there were no significant change in the fruit weight loss, hardness, color, soluble solid content, water content, vitamin C and organoleptic test. VHT at temperature 46.5OC for 20 up to 30 minutes were effective to kill fruit flies inside mangoes and were able tomaintaining mango quality during storage.Keywords : mango, fruit fly, disinfestations, vapor heat treatmentDiterima: 24 Maret 2008; Disetujui: 22 Oktober 2008

Desain dan Kinerja Unit Perlakuan Uap Panas (VHT) Untuk Disinfestasi Lalat Buah pada Penanganan Pascapanen Mangga

Jurnal Keteknikan Pertanian Vol 23, No 1 (2009): Jurnal Keteknikan Pertanian
Publisher : PERTETA

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Abstract

Formerly, chemical fumigation was used for disinfestation treatment, but now had been replaced bychemical-free disinfestations treatment such as vapor heat treatment (VHT). The objectives of this researchwere (1) to design the VHT Unit and testing its performances, and (2) to study the effect of the VHT methodand waxing on the fruit quality during storage of mango. The designs of VHT unit consist of water tank, filter,heater, water pump, differential pressure fan, atomizer, control panel and treatment chamber. Performanceof the unit showed that the temperature of the VHT chamber increased from ambient temperature of 30OCto setting point of 47OC in 70 minutes. Relative humidity of the VHT chamber was very high (more than90%) indicating the VHT unit was successful in being used for fruitfly disinfestations of fruit product. Usingsetting point of 46.5OC, the mango fruit core temperature reached temperature of 45.5-46.3OC in 130minutes. Mango ‘Gedong gincu’ were treated at 46.5OC for 10, 20, 30 minutes and control and then followedby waxing. The results showed that VHT of 10-30 minutes were not significantly affect the fruit quality.There were no significant changes in the fruit weight losses, hardness, color, soluble solid content, watercontent and vitamin C. VHT at 46.5OC for 20-30 minutes was effective to kill the fruitfly infested inside themangos and VHT followed by waxing was able to maintain mango quality during storage.Keywords : mango, fruit fly, heat quarantine treatment, vapor heat treatment (VHT)Diterima: 15 Januari 2008; Disetujui: 27 Agustus 2008

Ultrasonic Wave Characteristics of Arumanis Mangoes And Damage Arumanis Mangoes By Fruit Fly

Jurnal Keteknikan Pertanian Vol 23, No 1 (2009): Jurnal Keteknikan Pertanian
Publisher : PERTETA

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Abstract

The objective of this research was to study the ultrasonic wave characteristic at arumanis mangoesdamage caused by fruit fly. The ultrasonic characteristics that was used to sort the damaged mangoes fromthe normal mangoes were attenuation, velocity and moment zero power (Mo) number. Results showed thatmean attenuation coefficient of normal arumanis mangoes was 36.45 Np/m, mean velocity of ultrasonicwave was 518.19 m/s and Mo number was 4.58. The mean attenuation coefficient arumanis mangoeswhich damaged by fruit fly was 30.67 Np/m, mean velocity of ultrasonic wave was 731.72 m/s and Monumber was 6.40. Relation between the ultrasonic wave characteristic with arumanis mangoes damagecaused by fruit fly showed that attenuation coefficient of arumanis mangoes was increase but damagearumanis mangoes level was decrease, while Mo number was increase in parallel with increase of damagearumanis mangoes level. The ultrasonic wave velocities of arumanis mangoes didn’t show clear correlationwith damage arumanis mangoes level, as shown by from value of r2=0.01. Larva weight of inversely tovalue of attenuation coefficient, correlation of logarithm value r2=0.94. Correlation value of larva weight Mowith number was r2=0.38.Keyword : ultrasonic wave, arumanis mangoes, fruit fly, attenuation coefficient, Mo numberDiterima: 13 Maret 2008; Disetujui: 27 Oktober 2008

Penggunaan Teknologi Perontokan untuk Menekan Susut dan Mempertahankan Kualitas Gabah

Jurnal Keteknikan Pertanian Vol 23, No 2 (2009): Jurnal Keteknikan Pertanian
Publisher : PERTETA

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Abstract

Paddy (Oryza sativa) is a plant producing rice as a staple food of Indonesian people. Efforts to increaserice production is done not only through the extention of the rice areas, but also to minimize postharvestlosses. This study aims to assess the use of thresher technology on postharvest losses of paddy. Threshingof paddy is done by three methods: (1) manually or “gebot”, (2) using pedal threshers, and (3) using powerthreshers. The results showed that the use of power thresher able to reduce paddy losses from 3,31 to4,35 % (for manual threshing or gebot) to be 0,49 to 1,21 %. The use of power thresher also reduces thepercentage of grain cracking from 7,1 % to be 4,1 % by threshing manually. Threshing capacity using powerthresher from 708.0 to 773.0 kg/h, while using the pedal thresher 84.96 to 113.00 kg/h and manual thresherresulting only 54.69 to 62.22 kg/h.Keywords: paddy, power thresher, pedal thresher, manual thresher, postharvest lossesDiterima: 15 Juni 2009; Disetujui: 29 September 2009

Kajian Pengaruh Konfigurasi Mesin Penggilingan terhadap Rendemen dan Susut Giling beberapa Varietas Padi

Jurnal Keteknikan Pertanian Vol 23, No 2 (2009): Jurnal Keteknikan Pertanian
Publisher : PERTETA

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Abstract

Rice is the staple food for Indonesian people so that the rice supply will be the barometer for thenational’s food security. In rice production, both of postharvest losses and low milling yield are still theproblems due to lack of postharvest handling. In this study, the effect of rice milling machine configurationon the milling yield and quality of some paddy varieties was examined. Paddy variety of Ciherang, Cibogoand Hybrid were milled using a configuration process of: 1) two husking and two polishing (2H-2P), 2) onehusking, one separating and one polishing (H-S-P), and 3) one husking, two separating and two polishing(H-2S-2P). The results show that the paddy varieties significanly affect milling yield and losses. However,rice milling machine configurations are not significantly affect the milling yield and losses. Paddy variety ofCibogo resulting in the highest milling yield (67.80 %) compared to Ciherang (62.61 %) and Hibrida (60.78%). Paddy variety of Cibogo resulting in the lowest losses (1.41 %) compared to Ciherang (3.43 %) andHibrida (3.03 %). The speed of milling process for configuration of 2H-2P, H-S-P and H-2S-2P were 228.1kg/hour, 295.6 kg/h and 263.2 kg/hr respectively.Keywords: paddy, rice milling configuration, milling lossess, milling yieldDiterima: 30 Juni 2009; Disetujui: 19 Oktober 2009

Kajian Pengaruh Iradiasi Sinar Gamma Terhadap Mortalitas Lalat Buah Dan Mutu Buah Mangga Gedong (Mangifera indica L) Selama Penyimpanan

Jurnal Keteknikan Pertanian Vol 26, No 1 (2012): Jurnal Keteknikan Pertanian
Publisher : PERTETA

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Abstract

Abstract Gedong mango (Mangifera indica L.) is a tropical fruit that has the potential for export. But, the fruit of the mango is hosted by fruit fly. Fruit fly pests of mango export has been restrained by the very strict quarantine regulation. Therefore, it need a treatment that can annihilate the fruit fly. Irradiation technique has been one of the quarantine treatment that being attention, in order to disinfested pest attack. This research aims to study the effect of irradiation on mortality of fruit fly species Bactocera papayae (oriental fruitfly) on gedong mango, and to study the effect of irradiation dose and storage temperature on the physiology of the nature and quality of mangoes gedong. The results showed the mortality test results for B. papayae towards the dose 0.75 kGy reached until 100%. The next level was to test the mango fruit fly which considered infested naturally from the field. The dose given were 0:25 kGy, 0.5 kGy, 0.75 kGy and control. The results showed that in the control treatment founded that fruit flies growth from the day 9th to day 24th days of storage. 0.25 kGy dose and 0.5 kGy dose given were still found larva growth until the day 24th days of storage. From the test results of mortality at the dose of 0.75 kGy was able to annihilate fruit fly mortality reaches until 100%, but when applied to the fruit which has considered infested in the field were still found larvae growth until the 21st days of storage. Irradiation dose of 0.75 kGy can suppress the respiration rate, and weight losses during storage. With the irradiation dose can affected the quality of gedong mango such as vitamin C, total acid, Total Soluble Solid (TSS), and moisture content of gedong mango. Keywords: Gedong mango, Fruit flies, Irradiation, Quarantine treatment Abstrak Buah mangga gedong (Mangifera indica L.) merupakan salah satu produk hortikultura yang berpotensi untuk di ekspor. Tetapi buah mangga merupakan inang dari lalat buah. Serangan hama lalat buah menyebabkan ekspor buah mangga terhambat oleh aturan karantina yang sangat ketat. Oleh karena itu diperlukan suatu perlakuan yang dapat membunuh lalat buah tersebut. Teknik iradiasi sebagai salah satu perlakuan karantina mulai dilirik untuk tujuan disinfestasi serangga hama. Penelitian ini bertujuan untuk mempelajari pengaruh iradiasi terhadap mortalitas lalat buah (fruit fly) spesies Bactocera papayae (oriental fruitfly) pada buah mangga gedong, dan mempelajari pengaruh dosis iradiasi dan suhu penyimpanan terhadap sifat fisiologi dan mutu buah mangga gedong. Hasil penelitian menunjukkan untuk hasil uji mortalitas B. papayae terhadap dosis 0.75 kGy mencapai 100%. Tahapan selanjutnya adalah menguji buah mangga yang dianggap sudah terinfestasi lalat buah secara alami dari lapang. Besarnya dosis yang diberikan adalah 0.25 kGy, 0.5 kGy, 0.75 kGy dan kontrol. Hasil penelitian menunjukkan bahwa pada perlakuan kontrol ditemui lalat buah yang berkembang pada hari ke-9 sampai hari ke-24 penyimpanan. Pemberian dosis 0.25 kGy dan 0.5 kGy masih ditemukan larva yang berkembang hingga hari ke-24 penyimpanan. Dari hasil uji mortalitas pada dosis 0.75 kGy mampu membunuh lalat buah mencapai mortalitas 100%, namun ketika diterapkan pada buah yang dianggap sudah terinfestasi secara lapang masih ditemukan larva yang berkembang pada hari ke-21 penyimpanan. Pemberian dosis iradiasi sebesar 0.75 kGy dapat menekan laju respirasi, dan susut bobot selama penyimpanan. Dengan pemberian dosis iradiasi dapat mempengaruhi mutu buah mangga gedong seperti halnya kadar vitamin C, total asam, TPT, dan kadar air buah mangga gedong. Kata kunci : Mangga gedong, Lalat buah, Iradiasi, Perlakuan karantina.Diterima:09 November 2011;Disetujui: 13 Maret 2012 

Perlakuan Uap Panas (Vapor Heat Treatment) untuk Disinfestasi Lalat Buah dan Mempertahankan Mutu Buah Belimbing (Averrhoa carambola L.)

Jurnal Keteknikan Pertanian Vol 24, No 1 (2010): Jurnal Keteknikan Pertanian
Publisher : PERTETA

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Abstract

AbstractThe objectives of this research were to study mortality of carambola fruit fly (B. carambolae D & H) and to study responses of VHT on quality of carambola (A. carambola L). Fruit fly mortality due to heat has been investigated by immersing fruit fly eggs into hot water at temperatures of 40, 43, 46 dan 49oC for 30 minutes and then at temperature of 46.5oC for 0, 5, 10, 15, 20, 25, 30 minutes. Star fruit were treated at temperature of 46.5oC for 5, 15, 30 minutes and then stored in temperatures of 5, 15oC and room temperature (28-30 oC). The result show that mortality has been achieved 100% at temperature more than 43.0oC for 30 minutes and at temperature 46.0oC for more than 15 minutes. VHT had significant influences to decrease the fruit respiration rates, chilling injury, antraknose, to increase the weight loss, color, and soluble solid content. However, there were no significant change in the hardness, water content, vitamin C and organoleptic test. VHT at temperature 46.5oC for 20 up to 30 minutes were effective to kill fruit flies inside carambola and VHT combined by storing in temperature of 15oC were able to maintain carambola quality during storage.Keywords: vapor heat treatment, fruit fly, B. carambolae, carambola, disinfestationDiterima: 1 Februari 2010; Disetujui: 19 April 2010