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All Journal Jurnal Teknologi Dan Industri Pangan Jurnal Pengolahan Hasil Perikanan Indonesia JURNAL KIMIA SAINS DAN APLIKASI Jurnal Natur Indonesia Biota: Jurnal Ilmiah Ilmu-Ilmu Hayati Agrointek Jurnal Penelitian Pascapanen Pertanian agriTECH Biota Warta IHP (Warta Industri Hasil Pertanian) Squalen Bulletin of Marine and Fisheries Postharvest and Biotechnology Forest and Society Jurnal Pascapanen dan Bioteknologi Kelautan dan Perikanan JURNAL PANGAN Jurnal Mutu Pangan : Indonesian Journal of Food Quality Budimas : Jurnal Pengabdian Masyarakat Jurnal Fakultas Teknik UNISA Kuningan Livestock and Animal Research Journal of Livestock and Animal Health (JLAH) Food and Agro-industry (FAGI) Journal Food and Agro-industry (FAGI) Journal Jurnal Standardisasi Jurnal Penginderaan Jauh dan Pengolahan Data Citra Digital

Ratih Dewanti -Hariyadi

Departemen Ilmu Dan Teknologi Pangan, Fakultas Teknologi Pertanian, Institut Pertanian Bogor, Kampus IPB, Darmaga, Jl. Lingkar Akademik, Babakan, Kec. Dramaga, Bogor, Jawa Barat 16680

Author-ID : 209263

Religion Aerospace Engineering Agriculture, Biological Sciences & Forestry Humanities Biochemistry, Genetics & Molecular Biology Chemical Engineering, Chemistry & Bioengineering Chemistry Computer Science & IT Control & Systems Engineering Economics, Econometrics & Finance Electrical & Electronics Engineering Energy Engineering Environmental Science Immunology & microbiology Industrial & Manufacturing Engineering Materials Science & Nanotechnology Medicine & Pharmacology Public Health Social Sciences Veterinary Other

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(The Effect Of Reconstitution Temperature For Local Isolates Of Enterobacter sakazakii (Cronobacter sp.) from Powdered Infant Formula and Weaning Food) Ramadhani Meutia, Yuliasri; Dewanti-Hariyadi, Ratih; -, Estuningsih
Warta Industri Hasil Pertanian Vol 26, No 01 (2009)
Publisher : Balai Besar Industri Agro

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Enterobacter sakazakii (recently know as novel genus Cronobacter sp.) is opportunistic bacteria which can cause severe meningitis in neonates. Eight isolates of E.sakazakii which previously isolated from powdered infant formula (PIF) and weaning food were tested foe their ability to survive during reconstitution with water having various temperatures, and their fate during hang time in comparison with 7 isolates previously described by Estuningsih and E. sakazakii ATCC 352/7. reconstitution with 100 C water decreased he number of bacteria of most isolates to undetectable level, while with 40 C and 4 C water did not reduce the bacterial number significantly. Using water of 70 C, reconstitution decreased the number of bacteria of 10 isolates to undectable levels; however 6 isolates survived the reconstitution temperatures. The hang time test showed that some bacteria which were not detected after reconstitution with 70 C water became detectable after 2 hours. Those surviving reconstitution with 70 C well during hang time for 2 to 8 hours.

Antisipasi terhadap Isu-Isu Baru Keamanan Pangan (The Anticipation of New Issues Food safety) Hariyadi, Ratih Dewanti; Hariyadi, Purwiyatno
JURNAL PANGAN Vol 21, No 1 (2012): PANGAN
Publisher : Perum BULOG

Kemunculan emerging dan kontaminan baru yang berkaitan dengan keamananpangan merupakan isu yang tidak bisa dihindari. E. coli enterohemoragik misalnya,merupakan contoh emerging baru yang menyebabkan kematian dan kerugian ekonomi di Eropa, sedangkan di Cina melamin adalah contoh mutakhir kontaminan pada susu formula bayi yang telah menyebabkan kematian dan kerugian perdagangan di dunia. Paper ini mengulas berbagai potensi emerging dan kontaminan baru yang mungkin muncul dalam sistem pangan. Tujuannya adalah untuk memberikan pemahaman mengenai emerging dan kontaminan baru tersebut sehingga kemunculannya bisa diantisipasi dengan tepat, baik oleh pemerintah emerging pangan maupun konsumen. Penggunaan kerangka kerja analisis risiko merupakan pendekatan logis yang perlu ditempuh oleh pemerintah untuk melahirkan kebijakan dan tindakan keamanan panganyang tepat untuk keperluan antisipasi tersebut. Sementara itu, emerging pangan perlu secara cermat mengkaji ulang praktek dan tindakan keamanan pangan, termasuk program dan rencana HACCP yang ada. Beberapa hal yang perlu dilakukan oleh emerging antara lain, mengevaluasi kembali spesifikasi ingriedien dan titik-titik kendali kritis, mengembangkan program pengambilan contoh dan pemantauan lingkungan, serta menyesuaikan program pengambilan contoh produk. Dalam kaitannya dengan pengendalian kontaminan yang sengaja ditambahkan (intentional contamination), rencana HACCP perlu mencakup juga bahaya-bahaya yang telah diidentifikasi pernah secara sengaja dimasukkan dalam sistem produksi, serta mengidentifikasi dan mengevaluasi bahaya-bahaya lain yang diketahui atau yang diduga bisa secara sengaja dimasukkan sistem produksi.Emerging pathogens and food contaminants important for food safety are inevitable issues. Enterohemorhagic E. coli, for example, is the latest one to cause fatality and economic loss in Europe while in China melamine is a very important adulaterant in powdered infant formula that has cost life and trade worldwide. This paper discusses the emergence of foodborne pathogens and contaminants in food system. The objective is to provide better understanding regarding the emerging foodborne pathogens and contaminants so that their emergence should be well anticipated by government, food industries as well as consumers. Use of risk analysis framework is the logical approach for government to produceappropriate food safety measures and policies. Meanwhile,food industry should take into precaution their existing food safety measures and revisit their HACCP plan. The most likely aspects to be reconsidered include re-evaluation of the specification for ingredients and critical control points, establishment of environmental monitoring and sampling, and adjustment of sampling plan. With respect to preventing intentional contaminations, HACCP plan should include hazards that may be intentionally introduced, identify and evaluate known or reasonably foreseeable hazards that may be associated with the facility.

Penghambatan Produksi Aflatoksin dari Aspergillus flavus oleh Kapang dan Khamir yang Diisolasi dari Ragi Tempe Purwijantiningsih, Ekawati; Dewanti-Hariyadi, Ratih; Nurwitri, C. C.; Istiana, Istiana (alm.)
Biota : Jurnal Ilmiah Ilmu-Ilmu Hayati Vol 10, No 3 (2005): October 2005
Publisher : Universitas Atma Jaya Yogyakarta

This research was carried out to study the inhibition of aflatoxin production of Aspergillus flavus by moulds and yeasts isolated from ragi tempe. The result showed that moulds found in the ragi tempe consisted of Rhizopus oligosporus, R. oryzae, R. cohnii, Mucor rouxii, Rhizomucor pusillus, Aspergillus niger and miselia sterilia. Yeasts found in the samples were Candida sp1, Candida sp2 and Trichosporon sp. Twelve mould, and yeast isolates were chosen to determine their ability on inhibition of aflatoxin production. Aspergillus flavus alone or in association with each of these isolates were inoculated in Potato Dextrose Broth and analysed for aflatoxin production at day 10. All combinations yielded less aflatoxin than the single culture of A. flavus. All isolates tested could inhibit aflatoxin production. The highest inhibition was shown by Candida sp1 (99,96%).

Penghambatan Ekstrak Etanol Sereh (Cymbopogon citratus (DC) Stapf ) terhadap Produksi Verotoksin Escherichia coli Verotoksigenik Cepeda, Gino Nemesio; Hariyadi, Ratih Dewanti; Supar, Supar
Jurnal Natur Indonesia Vol 13, No 1 (2010)
Publisher : Lembaga Penelitian dan Pengabdian kepada Masyarakat Universitas Riau

Citronella was a spicy plant used as seasoning in Indonesian food. It was reported to have antimicrobial activity. Itsextract in form of volatile oil prepared by distilation can inhibit the growth of some bacteria. The objective of theresearch was to know the inhibition of ethanolic extract of the citronella on growth and verotoxin production ofverotoxigenic Escherichia coli. The assay of antimicrobial activity was done by using broth dilution and verocellassay. The results indicated that minimum inhibitory concentration of extract can inhibit effectively verotoxinproduction of verotoxigenic Escherichia coli.

SURVIVAL OF Cronobacter sakazakii IN SKIM MILK DURING SPRAY DRYING, STORAGE AND RECONSTITUTION [Ketahanan Hidup Cronobacter sakazakii dalam Susu Skim selama Proses Pengeringan Semprot, Penyimpanan dan Rekonstitusi] Ratih Dewanti Hariyadi; Fenny Larasati; Lilis Nuraida
Jurnal Teknologi dan Industri Pangan Vol. 23 No. 2 (2012): Jurnal Teknologi dan Industri Pangan
Publisher : Departemen Ilmu dan Teknologi Pangan, IPB Indonesia bekerjasama dengan PATPI

Cronobacter sakazakii is an emerging pathogen known to survive dry conditions and its presence in powder infant formula (PIF) has been linked to several outbreaks. In Indonesia, isolation of this bacterium from various foods have been reported. The objective of this study was to determine the effect of spray drying and storage humidity on the survival of C. sakazakii YRc3a in skim milk and their viability upon reconstitution. The survival of Cronobacter during spray drying was determined by comparing the number of bacteria before and after drying. The viability of Cronobacter in spray dried skim milk (SDSM) during storage was observed at weeks 1 to 8 and 12. At the same intervals, SDSM containing the pathogens was reconstituted at either 27°C or 50°C and the survivors were enumerated. The data were plotted to yield survival curves. Spray drying caused 4.19 log CFU/g reduction of Cronobacter and the bacteria experiencing drying were less sensitive to reconstitution at 50°C. During storage, the water activity of SDSM reached equilibrium at week 2 and afterwards, they started to decrease when stored at 50% or 90% RH, but maintained its viability at 70% RH. Storage at 50% and 90% RH accelerated the death rate of C. sakazakii YRc3a, resulting in the decline of the viable counts for 3 log cycles. At 50% RH, C. sakazakii Yrc3a decreased significantly, but the survivors exhibited increased heat resistance with the lowest reduction upon reconstitution at 50°C (0.16 log CFU/ml).

APLIKASI MUTAN BERFLUORESENS UNTUK MEMPELAJARI KETAHANAN HIDUP, KOLONISASI DAN PENETRASI ISOLAT Cronobacter sakazakii SELAMA PENGERINGAN JAGUNG [Use of GFP Mutant to Study the Survival, Colonization and Penetration of Cronobacter sakazakii Isolates Duri Siti Nurjanah; Maggy T. Suhartono; Ratih Dewanti- Hariyadi; Sri Estuningsih
Jurnal Teknologi dan Industri Pangan Vol. 24 No. 2 (2013): Jurnal Teknologi dan Industri Pangan
Publisher : Departemen Ilmu dan Teknologi Pangan, IPB Indonesia bekerjasama dengan PATPI

Cronobacter sakazakii is a Gram-negative emerging pathogen regarded as causative agent of meningitis and necrotizing enterocolitis in certain groups of infants. In the previous research, thirty-two local isolates of C. sakazakii were obtained from various dried food products such as from corn starch, suggesting that they are able to survive drying. Some of the isolates were toxic. Green Fluorescent Protein (GFP) have been inserted to C. sakazakii and used as a marker for selective enumeration due to the ability of this protein to fluoresce under UV and to tolerate in ampicillin containing media. The objective of this study was to evaluate the survival, colonization and penetration of two isolates of C. sakazakii from dried food product during maize drying. The maize was challenged with mutants at a concentration of 105-106 CFU/g before drying. Maize drying was performed at temperature of 40ºC, 45ºC and 50ºC for 4, 6 and 8 days until the moisture content reached 14%. The totals of resistant drying mutants were counted every day onto ampicillin containing media by observing under UV light. The survival rate of C. sakazakii during drying was determined by the slope of linier regression from C. sakazakii survival curve. Isolates of FWHd16, the toxic strain of C. sakazakii, were more resistant to heat treatments in comparison to isolates of YRt2a, or the non toxic strain of C. sakazakii. Following fluorescence and scanning electron microscope observation, it is concluded that both isolates were colonizing on maize surface. These mutants were able to penetrate to the inner side of the grain by entering injured surface or pores at the tip cap of maize.

RAPID DETECTION OF Salmonella IN SHRIMP BY POLYMERASE CHAIN REACTION [Deteksi Cepat Salmonella pada Udang dengan Polymerase Chain Reaction] Ulfah Amalia; Ratih Dewanti-Hariyadi; Achmad Poernomo
Jurnal Teknologi dan Industri Pangan Vol. 25 No. 1 (2014): Jurnal Teknologi dan Industri Pangan
Publisher : Departemen Ilmu dan Teknologi Pangan, IPB Indonesia bekerjasama dengan PATPI

RAPID DETECTION OF Salmonella IN SHRIMP BY POLYMERASE CHAIN REACTION [Deteksi Cepat Salmonella pada Udang dengan Polymerase Chain Reaction]Ulfah Amalia1,2), Ratih Dewanti-Hariyadi2,3)* and Achmad Poernomo4)1) Faculty of Fisheries and Marine Science, Diponegoro University, Semarang2) Department of Food Science and Technology, Bogor Agricultural University, Bogor3) Southeast Asian Food and Agricultural Science and Technology (SEAFAST) Center, Bogor Agricultural University, Bogor4) Center for Research and Development and Product Processing and Marine Biotechnology Fisheries (CRDPPMBF), the Ministry of Marine Affairs and Fisheries, Jakarta Accepted September 27th 2013 / Approved July 4th 2014ABSTRACT Shrimp is an important non-oil commodity for foreign trade in Indonesia. However, rejection of shrimp exports by the importing countries is still commonly encountered. In 2011, the USFDA recorded two cases of Salmonella spp. contamination in shrimp products from two shrimp processing companies in Indonesia. Analysis of Salmonella spp. in seafood is generally performed using a conventional method which takes at least 5 days. The objective of the study is to get a Salmonellae rapid detection method in shrimp by PCR. In this study, optimization of PCR protocol method to detect Salmonella invA gene was conducted using six different annealing temperatures (59, 59.5, 60.8, 62, 64 and 64.5°C). The results showed that 64°C was the optimum annealing temperature to detect the 284 bp fragment of Salmonella invA gene. The PCR based detection method has a DNA detection limit of 27.81mg/mL and 10°CFU/mL of viable salmonellae with 100% specificity. The PCR protocol is capable of detecting six different Salmonella serovars (S. Enteritidis, S. Hadar, S. Heidelberg, S. Kentucky, S. Paratyphi and S. Typhimurium) but none of the non salmonellae isolates. Application of the PCR assay on Salmonella in shrimp after the selective enrichment step suggested that all 16 samples were positive for Salmonella. At the same time, the conventional method could only detected 3 samples for Salmonella positive.

Cronobacter sakazakii MEMASUKI KONDISI VIABLE BUT NONCULTURABLE SELAMA PEMBENTUKAN BIOFILM Yesica M. R. Sinaga; Ratih Dewanti-Hariyadi; - Suliantari
Jurnal Teknologi dan Industri Pangan Vol. 27 No. 2 (2016): Jurnal Teknologi dan Industri Pangan
Publisher : Departemen Ilmu dan Teknologi Pangan, IPB Indonesia bekerjasama dengan PATPI

Studies show that nonsporeformer food-borne pathogens may enter a viable but nonculturable (VBNC) state under stress conditions. This research aimed to study the ability of Cronobacter sakazakii to enter a VBNC state during biofilm formation on stainless steel (SS) surfaces and its resuscitability. C. sakazakii YRt2a pGFPuv mutant and wildtype (WT) originally isolated from powder infant formula (PIF) were used in this study. Biofilms were developed on SS surfaces in 1/10 Trypticase Soy Broth (TSB). Culturability of the biofilms was monitored by swabbing and plating the WT or mutant sessile cells onto Trypticase Soy Agar (TSA) or TSA containing 100 μg/mL ampicillin (TSAA), respectively. Meanwhile, their viability was measured using direct microscopic (DMC) count based on green fluorescence for mutant isolates and direct viable count (DVC) for the WT using a fluorescence microscope. Biofilm of C. sakazakii pGFPuv mutant on SS entered VBNC state after 25 days of incubation, while the WT C. sakazakii biofilms was still culturable until day 63. Sodium pyruvate in solid and liquid medium was not able to resuscitate the biofilm cells of C. sakazakii pGFPuv in VBNC state. C. sakazakii pGFPuv mutants enter VBNC state faster than the WT isolates. Depleted nutrient is thought to drive biofilm of C. sakazakii pGFPuv to enter VBNC.

SINTASAN Cronobacter sakazakii pGFPuv SELAMA PENYIMPANAN JAGUNG PIPILAN BERKADAR AIR AWAL BERBEDA DI BERBAGAI RH Karina Nola Sinamo; - Suliantari; Ratih Dewanti-Hariyadi
Jurnal Teknologi dan Industri Pangan Vol. 27 No. 2 (2016): Jurnal Teknologi dan Industri Pangan
Publisher : Departemen Ilmu dan Teknologi Pangan, IPB Indonesia bekerjasama dengan PATPI

Cronobacter sakazakii is an opportunistic foodborne pathogen reported to cause necrotizing enterocolitis, bacteremia, and meningitis in certain groups of infant. C. sakazakii has been reported to survive at low aw or dryness. Presence of wild-type C. sakazakii in dry product is difficult to be distinguished from naturally occuring C. sakazakii. A pGFPuv mutant of C. sakazakii has been reported to have similar growth pattern, thus has the potential to be used in further investigation. The study aimed to evaluate the effect of initial moisture content and relative humidity (RH) on the survival rate of C. sakazakii pGFPuv in corn kernels during storage at room temperature. The study consists of drying corn kernels to achieve moisture contents of 12 and 16% (w.b), inoculation of C. sakazakii pGFPuv, and storage at RH 50, 70 and 90% for 12 weeks. Every two week, corn kernels were sampled and the moisture content was measured using oven method, water activity was measured with aw meter, and total C. sakazakii pGFPuv was enumerated by spread plate method. Meanwhile, total bacteria, mold and yeast were enumerated by pour plate method. Corn kernels achieved equilibrium moisture content and aw after two weeks of storage. The number of C. sakazakii decreased rapidly during storage at RH 70 and 90%, however they could survived at RH 50% for 12 weeks, especially when the initial moisture content was 16%. The total bacteria decreased by 3.5-3.9 Log CFU/g during storage at three RHs, but mold and yeast increased rapidly at RH 90%.

SELEKSI ISOLAT BAKTERI ASAM LAKTAT ASAL TEMPE DAN TAPE SEBAGAI KANDIDAT PROBIOTIK Raini Panjaitan; Lilis Nuraida; Ratih Dewanti-Hariyadi
Jurnal Teknologi dan Industri Pangan Vol. 29 No. 2 (2018): Jurnal Teknologi dan Industri Pangan
Publisher : Departemen Ilmu dan Teknologi Pangan, IPB Indonesia bekerjasama dengan PATPI

Lactic acid bacteria (LAB) have been isolated from Indonesian fermented foods such as tempe and tape. Some lactic acid bacteria are known to have health benefits and as probiotics. The objective of this study was to evaluate the probiotic potential of lactic acid bacteria isolated from tempe and tape. LAB isolated from tape were evaluated for their tolerance towards low pH (pH 2.0) and 0.5% bile salt. LAB isolated from tape and tempe resistant to low pH and bile salt were then evaluated for their antimicrobial activities against pathogenic bacteria (E. coli ATCC 25922, S. typhimurium ATCC 14028, L. monocytoge-nes ATCC 7644, S. aureus ATCC 25923 and B. cereus ATCC 11778). The isolates were also tested for their adherence properties, consisting of hidrophobicity test using microbial adhesion to solvents (MATS) assay, autoaggregation as well as coaggregation between LAB and pathogens. The results of this study indicated that three isolates from tape (L. fermentum 1 BK2-5, L. fermentum 2 BK2-7, P. acidilactici NG6-4) showed good tolerance to pH 2.0 and 0.5% bile salt. L. fermentum S21209 isolated from tempe showed the strongest antimicrobial activity against the five pathogens tested. Based on the adhesion to xylene, L. fermentum 1 BK 2-5 was categorized as strong hydrophobic, followed by L. fermentum S21209 and L. fermentum TS4-5. Meanwhile, L. fermentum TS 4-5, L. fermentum S21209, L. fermentum 1 BK 2-5 and P. pentose-ceus 1 W2SR04 have the highest autoaggregation ability. L. fermentum S21209 also had the highest co-aggregation ability to the five pathogenic bacteria tested. The ability of LAB to coaggregate with all pathogens tested correlated with their strong antimicrobial properties. Based on the resistance toward low pH and bile salt, antimicrobial activity and adherence properties, L. fermentum S21209 from tempe and L. fermentum 1 BK 2-5 from tape are the most potential as probiotic candidates.

Co-Authors - Suliantari Abd. Rahman As-syakur Achmad Poernomo Achmad Poernomo Achmad Poernomo Alifia, Murninur Amiroh Amiroh Amiroh Amiroh, Amiroh Arimah Arimah Ayu Intan Sari Aziz, Kholifatul Azura Ulfa, Azura Bambang Trisakti Budi Nurtama C. C. Nurwitri Cahyadi, Muhammad Cynthia Cynthia Cynthia CynthiaCynthia David Yudianto Dedi Fardiaz Ekawati Purwijantiningsih Ekawati Purwijantiningsih, Ekawati Eko Hari Purnomo Endang Tri Rahayu, Endang Tri Ermi Sukasih Estuningsih - Estuningsih - Ety Parwati Fadhina, Maisharah Fenny Larasati Firman Fajar Perdhana Gathot Winarso, Gathot Gino Nemesio Cepeda Hanifaturahmah, Fadiyah Harsi D. Kusumaningrum Hesty Nur Fadia Istiana (alm.) Istiana Istiana, Istiana (alm.) Ita Carolita, Ita Joko Riyanto Karina Nola Sinamo Komala, Kemal Lendrawati Lendrawati Lilis Nuraida Maggy T. Suhartono Maggy Thenawidjaja Suhartono Mala Nurilmala Melati, Rahadina Praba Muhammad Nur Mutaqin, Muhammad Zakki Nandika, Muhammad Rizki Nanin Anggraini, Nanin nFN Setyadjit Ni Gusti Ayu Made Widyatari Asthiti Ni Made Vina Citanirmala Nugroho Indrotristanto Nur Richana Nur Wulandari Nur Wulandari Nuri Andarwulan Nurwitri, C. C. Oryssa Sathalica Pradianti Pawestri, Wari Prasetio, Wiji Pratiwi Yuniarti Martoyo Pratiwi Yuniarti Martoyo Purwiyatno Hariyadi Rahmawati Rahmawati Raini Panjaitan Ramadhani Meutia, Yuliasri Ratu Ayu Dewi Sartika Rika Puspitasari MZ Rinto . Sari, Ratna Nurmalita SEDARNAWATI YASNI Shanti Emawati Siti Nurjanah Siti Nurjanah Soegiarto, Salma Rachmanda Sri Estuningsih Sri Harini Suardana, A. A. Md. Ananda Putra Suci Apsari Pebrianti Sudiyono Sudiyono Sukarno Sukarno Supar, Supar Sutrisno Hadi Purnomo Tatik Kartika, Tatik Tri Isti Rahayu Ulfah Amalia Uswatun Hasanah Vanessa Len Cahya Agustine Wati, Ari Kusuma Wijaya, Agung Dwi Wilis, Nabila Sekar Winiati P Rahayu Winiati P Rahayu Winiati P. Rahayu Winiati Pudji Rahayu Wiweka, Toh Jaya Yati Maryati Yati Maryati Yesica M. R. Sinaga Yesica Marcelina Romauli Sinaga Yuli Yanti Yuliasri Ramadhani Meutia Yusma Yennie Yusma Yennie

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