Lady Lengkey
Jurusan Teknologi Pertanian, Fakultas Pertanian, Universitas Sam Ratulangi, Manado Jalan Kampus Kleak, Manado, Sulawesi Utara, 95115.

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MODEL PENDUGAAN KANDUNGAN AIR, LEMAK DAN ASAM LEMAK BEBAS PADA TIGA PROVENAN BIJI JARAK PAGAR (Jatropha curcas L.) MENGGUNAKAN SPEKTROSKOPI INFRAMERAH DEKAT DENGAN METODE PARTIAL LEAST SQUARE (PLS) LENGKEY, LADY C. E. CH.; BUDIASTRA, I WAYAN; SEMINAR, KUDANG B.; PURWOKO, BAMBANG S.
853-8212
Publisher : Pusat Penelitian dan Pengembangan Perkebunan

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Abstract

ABSTRAKJarak pagar berpotensi sebagai sumber biodiesel karena kandunganlemak yang tinggi (>40%) dan belum ada penggunaan lainnya.Spektroskopi (Near Infrared) NIR adalah metode yang cepat untukmengukur spektrum sampel dan tidak terdapat limbah kimia. Tujuanpenelitian adalah mengembangkan metode pendugaan komposisi kimiabeberapa  provenan  jarak  pagar  berdasarkan  spektroskopi  NIRmenggunakan kalibrasi PLS. Pengujian dilakukan menggunakan tigaprovenan jarak pagar yaitu IP-3A, IP-3M, dan IP-3P masing-masing 85sampel. Spektrum reflektansi diukur menggunakan alat NIRFlex SolidsPetri pada panjang gelombang 1000–2500 nm. Sekitar ⅔ jumlah sampeldigunakan untuk mengembangkan persamaan kalibrasi dan ⅓ jumlahsampel untuk validasi. Pra perlakuan data spektrum dilakukan dengannormalisasi antara 0-1, turunan pertama Savitzky-Golay 9 titik dangabungan keduanya. Hasil penelitian menunjukkan spektroskopi NIRdapat menduga kadar air, lemak, dan asam lemak bebas . Koefisienkorelasi (r) antara komponen kimia metode acuan dengan dugaan NIR>0,83 menunjukkan ketepatan model cukup baik (r kadar air=0,96, r kadarlemak=0,92, dan r ALB=0,89 ). Konsistensi model kalibrasi kadarair=94,85%, lemak=82,56%, dan ALB=87,80%. Koefisien keragamandugaan (Prediction Coeficient Variability/PCV) ketiga model <10%menunjukkan model yang dibangun cukup handal. Ratio of standard errorprediction to deviation (RPD) menunjukkan metode spektroskopi NIRdapat digunakan untuk menentukan kadar air (RPD=3,30) dan lemak(RPD=2,06). Model-model yang dikembangkan secara umum layakuntuk menentukan kadar air dan lemak biji jarak pagar, tetapi belumoptimal untuk penentuan kadar ALB biji jarak pagar.Kata kunci: NIR , jarak pagar, kadar air, kadar lemak, kadar asam lemakbebasABSTRACTPhysic nut is a potential source of biodiesel. It is high in fat content,above 40% and has not been usesed for other purposes. Moisture, free fattyacid, and fat content are the chemical compounds and determinant factorfor physic nut seed quality. The objective of this study was to develop amethod to predict chemical composition of physic nut by NIRspectroscopy and PLS calibration. The study was conducted using threeprovenances of physic nut, i.e. IP-3A, IP-3M, and IP-3P, with 85 sampleseach. The wavelengths of near infrared reflectance ranged from 1000 to2500 nm, and measured by NIR Flex Solids Petri Apparatus.Approximately ⅔ of total samples were used for developing calibrationequation, while ⅓ of total samples for performing validation. Pre-treatmentof spectrum data was done by applying normalization, first derivative ofSavitzky–Golay 9 points, and as well as their combination. The resultsshowed that NIR spectroscopy performed acceptable prediction formoisture and fat content. Correlation coefficients (r) between the referencemethod and NIR prediction were 0.96 for moisture content, 0.92 for fatcontent, and 0.89 for FFA and the consistency of the model were 94.85%for moisture content, 82.56% for fat, and 87.80% for FFA. Prediction ofcoefficient of variability (PCV) of the three models ≤10 % shows that themodels are reliable. Ratio of standard error prediction to deviation (RPD)for moisture content has the potential to be used for screening (RPD=3.30)though the fat content model has rough screening (RPD=2.06).Key words: NIR, physic nut, moisture, fat, free fatty acid contents.
THE QUALITY OF NUTMEG SEEDS AND MACE FROM NORTH SULAWESI Roeroe, Henriette Jacoba; Marmis, Joubert; Tongkeles, Nelly Selvia; Lengkey, Lady
JURNAL LPPM BIDANG SAINS DAN TEKNOLOGI Vol 2, No 1 (2015)
Publisher : JURNAL LPPM BIDANG SAINS DAN TEKNOLOGI

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Abstract

Nutmeg seeds and mace quality are important export commodity from North Sulawesi. Recently, Indonesian nutmeg seeds and mice were contaminated by aflatoxin which was emerged in the storage. This resulted in decrease in price and demand of nutmeg especially from European countries. Aflatoksin scientifically proven can cause cancer. Thus, the products should follow the quality control test to insure the safety and health of consumers to be exported to European countries. This study aimed to know the nutmeg seeds and mace quality using descriptive statistic method. The result showed that 77 nutmeg seeds and 14 mace exports sample tested in 2010 - 2013 qualified for standard quality according to Indonesian National Standard (SNI). However, those samples were contained Aflatoxin ranged between 1.67ppb to 2.00 ppb. This indicated that SNI was no longer able to determine the quality of the nutmeg seeds and mace for export.
PENAMBAHAN GIBERALIN (GA3) DAN SUHU DINGIN TERHADAP MASA SIMPAN BUNGA GLADIOL DALAM KEMASAN PLASTIK Longdong, Ireine A.; Lengkey, Lady; Kairupan, Stella
EUGENIA Vol 17, No 3 (2011)
Publisher : Universitas Sam Ratulangi

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.35791/eug.17.3.2011.3549

Abstract

ABSTRACT   This study aimed to obtain the concentration and duration of immersion Giberalin type GA 3 the most effective way to extend the shelf life of gladiolus flowers, and to get the type of packaging and the right temperature in prolonging the shelf life of gladiolus flowers to prolong shelf life. Descriptive method was used in two experiments. The first experiment was  GA3 concentration and immersion time on the shelf life of gladiolus flowers. The second experiment was  the type of packaging and cold temperatures on the shelf life of gladiolus flowers.  The result of first experiment showed that  gladiolus flowers  soaked at a concentration of 250 ppm GA3 and 1 hour immersion time gives had the lowest value. CO2 production was ranged from mlCO2/kg.hours 18:43  to 33.30 mlCO2/kg.hours. Severe shrinkage rates in day two ,four and six were    27.92%, 36.31% and 40.27% respectively. The degree of gladiolus flowers bloom in the day two was  42.85%  and degree of  on day four was 33.63%. The results of second experiment showed that gladiolus flowers packed in polypropylene plastic storage temperature of 50C for 12 days resulted  the lowest value. CO2 production were ranged from 8.68 mlCO2/kg.hours - 15:10 mlCO2/kg.hours. The severe shrinkage in first  day was  1 27.29%. The degree of blooming in the 8 th day was  9.63%. Degree of wilting during 12 days storage was  0%. Keywords: Flowers gladiolus, Giberalin, cold temperatures, shelf life, plastic packaging
REKAYASA MESIN PENGUPAS KULIT BUAH KOPI JENIS ROBUSTA MODEL TEP-JLL 2015 DI KABUPATEN TANA TORAJA Langi, Jois Limbong; Ludong, Daniel P. M.; Lengkey, Lady C. Ch. E.
Jurnal Teknologi Pertanian (Agricultural Technology Journal Vol 11, No 1 (2020): Jurnal Teknologi Pertanian (Agricultural Technology Journal)
Publisher : Fakultas Pertanian, Universitas Sam Ratulangi

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.35791/jteta.11.1.2020.29983

Abstract

ABSTRACT The objective of this research was to design a pulper machine model TEP-JLL 2015 for fresh coffee robusta used in rural areas of Tana Toraja district. The machine was designed based on the analysis of physical characteristics of Robusta Tana Toraja coffee and literature study. The analysis result of physical characteristics showed the average length, thickness width was 12.494 mm, 12.802 mm, 10.687 mm, respectively, and the bulk density was 1,115 kg/m3. The theoretical hopper capacity of this machine was 3.7687 kg. Assuming the cylinder speed was 111.594 rpm with an effective distance setting system or flawed setting of 1.2 cm, the theoretical capacity of this pulper machine was 380.62 kg/hour. Keywords: fresh Robusta coffee fruit, pulper machine
ANALISIS KUALITAS SELADA (Lactuca sativa L.) YANG DITANAM PADA DUA MEDIA SELAMA PENYIMPANAN DINGIN Rantung, Livia E.; Lengkey, Lady C. Ch. E.; Wenur, Frans
Jurnal Teknologi Pertanian (Agricultural Technology Journal Vol 11, No 1 (2020): Jurnal Teknologi Pertanian (Agricultural Technology Journal)
Publisher : Fakultas Pertanian, Universitas Sam Ratulangi

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.35791/jteta.11.1.2020.29985

Abstract

ABSTRACTThe objective of this study was to investigate the quality (weight, color, stem firmness and total dissolved solids) of hydroponic and soil culture lettuce (Lactuca sativa L.).  This study used a non factorial completely randomized design with two treatments (type of planting media) as follows hydroponic lettuce and soil culture lettuce. This research conducted 9 replications. Data were analyze with ANOVA to determine whether there is a difference in the quality of lettuce after storage at cold temperatures. Lettuce is packed and placed at cold storage of 50C. The change in weight, color, stem firmness and total dissolved solids  were observed every 3 days during storage period. The result of this study show that hydroponic lettuce and soil lettuce gave different responses during cold storage. After 15 days of storage, soil culture lettuce has better quality than hydroponic lettuce in terms of maintaning the weight and total dissolved solids. While, in maintaning the color and firmness of the stem, hydroponic lettuce has better quality. Keywords: Lettuce, planting media, cold storage
KAJIAN MUTU LABU SIAM (Sechium edule) TEROLAH MINIMAL YANG DIKEMAS VAKUM SELAMA PENYIMPANAN Pinem, Esron H.; Longdong, Ireine A.; Lengkey, Lady C. Ch. E.
Jurnal Teknologi Pertanian (Agricultural Technology Journal Vol 11, No 2 (2020): Jurnal Teknologi Pertanian (Agricultural Technology Journal)
Publisher : Fakultas Pertanian, Universitas Sam Ratulangi

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.35791/jteta.11.2.2020.31488

Abstract

AbstractThis study aims to analyze the deterioration of the quality of the chayote during storage using several packaging methods. The research method was carried out experimentally and the data were processed descriptively which consisted of three treatments, namely: vacuum packed, without vacuum, and open. Each treatment was carried out 3 (three) times with each weight of 250 grams. Research shows that minimally processed chayote which is vacuum packed and stored at a temperature range of 5oC - 9.6oC can last for 12 days, experiencing a weight loss of 0.90%. The color changed from Faded Yellow to Gray Yellow. The texture becomes soft with a hardness value of 8.80 N. The water content changes from 91.98% to 94.70%.In conclusion, the storage life of vacuum packed minimally processed chayote could be prolonged up to 12 days at 5oC – 9,6oC, grey-yellow in color, texture softened, and weight loss as much as 0.90%. Keywords: Chayote, minimally processed, vacuum packed.
ANALISIS MUTU DAN EKONOMI PENERAPAN PENGEMASAN VAKUM BAWANG DAUN POTONGAN (Allium fistulosum L.) SELAMA PENYIMPANAN Mikael, Florensi Wahyuni; Molenaar, Robert; Lengkey, Lady C. Ch. E.
Jurnal Teknologi Pertanian (Agricultural Technology Journal Vol 11, No 2 (2020): Jurnal Teknologi Pertanian (Agricultural Technology Journal)
Publisher : Fakultas Pertanian, Universitas Sam Ratulangi

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.35791/jteta.11.2.2020.31487

Abstract

AbstractThis study aimed to analyze leeks packaging and without packaging during storage, and to analyze economical packaging and knowing the number of breakeven points obtained. This study uses an experimental method, and descriptive analysis of data consisting of 2 treatments and 3 replications, namely scallions which are vacuum packed, and leeks without packaging that are stored in a refrigerator with a temperature of 5-10˚C.From the results of research on quality analysis of changes in weight, color and texture showed that the vacuum packaged onions at a storage temperature of 5˚C – 10˚C gave the best results over a 14-day shelf life compared to unpacked leeks which only lasted for a shelf life of 6 days. Weight reduction occurred in the treatment without packaging by 44%. The total fixed cost is Rp.219,625 /Year, the total variable cost is Rp.5,519 per package, with a yearly production of 24,300 packs /Year, to obtain the selling price of vacuum packaging leeks of Rp.6,080 per package, and the break-even analysis results in get is 392 packaging /Year.Keywords : Leeks, Vacuum Packaging, Storage Time
ANALISIS MUTU BIJI PALA (Myristica fragrans H.) PADA BERBAGAI TINGKAT KEMATANGAN BERBEDA SETELAH PENJEMURAN Awuy, Gebby; Longdong, Ireine A.; Lengkey, Lady C. Ch. E.
Jurnal Teknologi Pertanian (Agricultural Technology Journal Vol 11, No 2 (2020): Jurnal Teknologi Pertanian (Agricultural Technology Journal)
Publisher : Fakultas Pertanian, Universitas Sam Ratulangi

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.35791/jteta.v11i2.37787

Abstract

AbstractThe objective of this study is to investigate the quality of nutmeg with different degrees of maturity in sun drying based on the national quality standards in Indonesia, namely Calibrated Nutmeg (CN), ABCD (Average), shrivel, and BWP (Broken Wormy Punky). The result of this study showed that older maturity degree of nutmeg give the better quality. Nutmeg with maturity degree of 7 months contain 0 % CN, 7.16 %  ABCD, 13.09 % Shrivel, and 79.75 % BWP. Nutmeg with maturity degree of 8 months contain 7.90 % CN, 13.09 % ABCD, 13.3 % Shrivel, and 65.68 % BWP. Nutmeg with maturity degree of 9 months contain 30.12 % CN, 38.27 % ABCD, 20.99 % Shrivel, and 10.62 % BWP. Key words: quality analysis, different degrees of maturity, sun drying, nutmeg