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

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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
UJI KINERJA ALAT PENGERING PALA MENGUNAKAN BAHAN BAKAR BIOMASSA Dadamuda, Dafrin; Lengkey, M.Si, Dr. Ir. Lady Ch.E; Rawung, M.Si, Handry
COCOS Vol 2, No 7 (2019)
Publisher : COCOS

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ABSTRAK Penjemuran biji pala sering terhambat jika curah hujan tinggi akibatnya kadar air biji pala yang dikeringkan masih tinggi dan tidak merata dengan demikian biji pala dapat terkontaminasi dengan jamur yang dapat menghasilkan racun aflatoksin. Untuk mencegah hal itu maka perlu membuat alat pengering seperti yang disarankan oleh tim Indonesia – UE Trade Support Programme II. Alat yang disarankan oleh Tim Indonesia – EU Trade Support Programme II menggunakan sumber energi listrik dengan daya 1000 Watt. Hal ini menjadi masalah di desa Ambia kecamatan Esang Selatan. Masalah tersebut dapat diatasi dengan memodifikasi alat pengeringan dengan menggunakan tungku berbahan bakar biomassa. Penelitian ini bertujuan untuk menguji teknis alat pengering tipe bak dengan menggunakan bahan bakar biomasa dari segi sebaran suhu, menentukan hubungan kadar air terhadap waktu pengeringan. Penyebaran suhu pada ruang plenum, ruang pengering, suhu bahan dan suhu udara luar terjadi fluktuasi suhu dalam ruang pengering. Perbedaan suhu pengering (plenum) dan suhu lingkungan sangat jauh berbeda Suhu plenum atau suhu udara pengering terendah 53,6 0C, suhu tertinggi 77,6 0C dan suhu lingkungan suhu terendahnya 31,7 0C dan suhu tertinggi 37,2 0C. Pola penurunan kadar air terlihat hampir sama menunjukkan penyebaran suhu yang hampir merata.
MODIFIKASI TUNGKU PEMBUATAN GULA AREN (Arenga Pinnata) MENGGUNAKAN BAHAN BAKAR LPG (Liquified Petroleum Gas) Mokodompit, Rizal; Pangkerego, MS, Ir. Freeke; Lengkey, MSi, Dr. Ir. Lady
COCOS Vol 1, No 4 (2019)
Publisher : COCOS

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Abstract The purpose of this study was to modify and make furnace for the processing of palm sugar, test the performance of modified furnace and traditional furnace in terms of fuel usage and processing time, and calculate the efficiency of traditional furnaces and furnaces. The results showed that the processing of palm sugar sap using 3.6 kg LPG fuel modification furnace had a processing time of 3.33 hours whereas, the processing of traditional palm sugar palm sap using wood fuel as much as 49.3 kg had a processing time of 1, 73 hours because palm sugar has been preheated. The FCR fuel consumption rate using a modified furnace is 1,081 (kg / hour), and the FCR fuel consumption rate (fuel consumption rate) using traditional furnace is 28.49 (kg / hour). The efficiency of the modified furnace is 8.90%, and the efficiency of traditional furnaces is 1.07% Keywords: Processing Time, Fuel Consumption, Furnace Efficiency
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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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.
PENGARUH PENGEMASAN VAKUM TERHADAP KERUSAKAN BIJI JAGUNG (Zea mays L.) Basriadi, Novia; Lengkey, Lady Corrie E. Ch.; Wenur, Frans
COCOS Vol 1, No 4 (2019)
Publisher : Universitas Sam Ratulangi

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.35791/cocos.v1i4.24165

Abstract

ABSTRACT The main problem during corn storage is the attack of insects and fungi. Packaging is one way to overcome this problem. The purpose of this study was to determine the initial and final moisture content of vacuum-packed corn kernels, without vacuum packaging and without packaging, as well as to calculate damage to dried corn during storage. The research method was the experimental method of Completely Randomized Design (RAL) using three treatments: vacuum packaging, without vacuum packaging and without packaging. Then the material is stored for two months at room temperature. The results showed that the lowest damage percentage of corn seeds stored at an average room temperature of 27.7oC was obtained in a vacuum packaging treatment with insect damage rate of 6.31%, fungal damage of 8.96%, with an average moisture content average of 14.19%. Keywords : Dried Corn, Vacuum Packaging, Insect and Fungi Damage
KAJIAN PENYIMPANAN DINGIN TERHADAP MUTU BUNGA POTONG KRISAN Walangitan, Satriani Stelma; Londong STP. MP., Ireine A.; MSi., Dr. Ir. Lady Lengkey
COCOS Vol 1, No 1 (2017)
Publisher : COCOS

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ABSTRACT The aims of this study is to determine the shelf life and quality change i.e the wilting percentage of  chrysanthemum cut flowers, weight loss, changes in the diameter of the bud and color changes of the flower. This research use descriptive method. Before placing in the refrigerator pre-cooling has been done by dipping the flower stems into 3°C of ice water and held at the average temperature of 7,35°C. The results showed that the longest vase life of chrysanthemum cut flower is 41 days. The wilting reached 100% on 41th day. The average of weight loss percentage is 18,69%. The average of diameter change of flower buds reached the maximum on the 37th day. The color of petals change from white to brown.   Keywords: Pre-cooling, chrysanthemum cut flower, cold storage
PENENTUAN UMUR SIMPAN SIRUP PALA BERDASARKAN PERUBAHAN DERAJAT KEASAMAN pH Sahambangung, Melisa J.; Lengkey, Lady Ch.; Rumambi, David
COCOS Vol 7, No 3 (2016)
Publisher : COCOS

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ABSTRACTNorth Sulawesi province known as one of the largest producer of nutmeg crop in Indonesia. North Sulawesi supplies about 75% of the needs of nutmeg world with exports ranging between 1000 to 2000 tons. Processing nutmeg nutmeg syrup is one way of diversification of nutmeg. Small and Medium Industries (SMI) "Sari Fruit" is one nutmeg syrup producers in North Sulawesi, especially in the district of Sitaro. However nutmeg syrup products on the market has not been specified expiration date. One method that can be used in determining the shelf life of foodstuffs is ASLT (Accelerated Shelf Life Testing). The benefits of this research is to increace public knowledge about the processing of nutmeg syrup, and to add nutmeg syrup product competitiveness. The nutmeg syrup stored at a temperature of 30 ° C, 35 ° C and 40 ° C for 12 weeks (90 days). The parameters used to analyze the degradation products are nutmeg syrup, pH. The results showed that the shelf life based on pH nutmeg syrup at normal storage temperature of 30 ° C is 52.48 weeksKey words : nutmeg syrup, ASLT ((Accelerated Shelf Life Testing)
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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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.
PENGARUH PULSING DENGAN AIR KELAPA DAN SUHU PENYIMPANAN TERHADAP MUTU BUNGA POTONG MAWAR (Rosa hybrida) Rengkuan, Riva R.; Longdong STP, MP, Ireine A.N.; Lengkey, MSi., Dr. Ir. Lady C. Ch.
COCOS Vol 1, No 5 (2017)
Publisher : Universitas Sam Ratulangi

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.35791/cocos.v1i5.15847

Abstract

ABSTRACTEffects of pulsing and low temperature storage on the vase life of rose cut flowers had been studied. To prolong the postharvest life or flowering display of rose cut flowers by pulsing them after picking, that is, putting the stems in a sugar solution. The objectives of this study was to get the best pulsing time, vase life and quality change i.e the wilting percentage of rose cut flowers. First step of this research was pulsing the rose cut flowers with a coconut water for 1, 2, and 3 hours, then stored those flowers in low temperature 5,250C. The results showed that pulsing the rose cut flowers in coconut water for 2 hours is the best pulsing time and can prolong the vaselife until 40 days.Keyword : Pulsing, coconut water, rose cut flowers, cold storage
KARAKTERISTIK DAN MODEL PENGERINGAN LAPISAN TIPIS DAGING BUAH PALA (Myristica fragrans Houtt) MENGGUNAKAN EXPERIMENTAL DRYER Koloay, Frisela Groria; Lengkey, Lady; Wenur, Frans
COCOS Vol 1, No 7 (2017)
Publisher : Universitas Sam Ratulangi

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.35791/cocos.v1i7.16899

Abstract

ABSTRAC Drying the nutmeg flesh with a thin layer method is carried out by using an experimental dryer. The objectives of this study were to study of drying air temperature and humidity on the drying of nutmeg flesh and to develop a mathematical model to estimates the drying curves. The experimental dryer is modified at Workshop of Agricultural Engineering study program University of Sam Ratulangi. The drying temperature is arranged at 60˚C. Simple method using an excel software is used in the analysis of raw data obtained from the drying experiment. The results showed the dryer air temperature in the dryer distribution and fluctuate in 52.1-62. 5˚C, while relative humidity ranges from 42-47%. It takes 3 hours to dry the nutmeg flesh until 12 – 14% moisture content. Mathematical model of the relation of water content and time is y = 1001.4e-0.023 with coefficient of determination (R²) = 0.9919. The mathematical model of drying rate versus time is y = 5.006e-0.016 with R² = 0.9662. While the mathematical model of drying rate versus moisture content is y = 1.5115e0.0036x with R² = 0.799. The models showed have a good in quality of the fit.Keywords: dry nutmeg, characteristics, drying model and thin layer