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Yulia, Meinilwita
Jurusan Teknologi Pertanian, Politeknik Negeri Lampung, Jl. Soekarno Hatta No. 10, Rajabasa Bandar Lampung, Lampung
Agriculture, Biological Sciences & Forestry Biochemistry, Genetics & Molecular Biology Chemical Engineering, Chemistry & Bioengineering Computer Science & IT Education Engineering Environmental Science Industrial & Manufacturing Engineering Mechanical Engineering

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APLIKASI UV SPECTROSCOPY DAN METODE SIMCA UNTUK KLASIFIKASI KOPI LIBERIKA TUNGKAL JAMBI DAN KOPI LIBERIKA PROBOLINGGO Sapto Kuncoro; Meinilwita Yulia; Diding Suhandy
Jurnal Teknik Pertanian Lampung (Journal of Agricultural Engineering) Vol 10, No 1 (2021): Maret
Publisher : The University of Lampung

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.23960/jtep-l.v10i1.49-56

Abstract

Tungkal Composite Jambi Liberika Coffee is one of the top qualities of Indonesian coffees that has received a geographic indication certificate (IGs). With its limited production and high prices, currently Tungkal Jambi Liberika coffee is one of the coffees that is prone to being counterfeited. The counterfeiting of Tungkal Jambi Liberika coffee is increasingly difficult to identify, especially in the form of ground roasted coffee. This study evaluated the potential application of UV spectroscopy technology to classify Tungkal Jambi Liberika coffee (with geographic indications) and normal Probolinggo Liberika coffee (non- geographic indications). A total of 120 samples for each Liberika coffee were prepared weighing 1 gram for each sample. Spectra measurements were carried out in the form of a coffee solution. Spectral data were taken using a UV-visible spectrometer with a wavelength interval of 200-400 nm (Genesys™ 10S UV-Vis, Thermo Scientific, USA). By using the average transformed spectra in the 250-350 nm interval, the differences between the two types of Liberika coffee can be clearly seen, especially at some wavelength peaks, namely 270 nm, 300 nm, 315 nm and 346 nm. The classification accuracy obtained for the SIMCA classification is 100% for both Tungkal Jambi Liberika and Probolinggo Liberika coffee. Keywords:   authentication, classification accuracy, Tungkal Jambi Liberika coffee, SIMCA, UV Spectroscopy 
Seleksi Panjang Gelombang yang Efisien pada Nir Spectroscopy untuk Pengukuran Kandungan Padatan Terlarut Buah Salak Pondoh Menggunakan Model Forward Interval PLS (FiPLS) Meinilwita Yulia; Diding Suhandy
Jurnal Ilmiah Teknik Pertanian - TekTan Vol 6 No 3 (2014)
Publisher : Jurusan Teknologi Pertanian

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.25181/tektan.v6i3.838

Abstract

In this research, the feasibility of using NIR spectroscopy coupled with forward interval partial least squares (FiPLS) regression for nondestructive soluble solids content (SSC) determination in Pondoh snake fruit was investigated. Spectra of snake fruit were acquired using a VIS-NIR USB4000 portable spectrometer in absorbance mode. The SSC was measured using a digital refractometer.  The calibration and validation models were developed using the FiPLS regression using original spectra. The result showed that the optimal combinations of 7 spectral intervals among 11 intervals which selected by FiPLS yielded good results (RMSEC = 0.854783%, rc= 0.96, RMSECV = 0.899828%, rv = 0.95).  Keywords: soluble solids content, absorbance mode, nondestructive method, snake fruit, FiPLS regression, NIR spectroscopy
Penentuan Kadar Gula Buah Salak Secara Tidak Merusak Menggunakan Near Infrared (Nir) Spectroscopy dan Interval Partial Least Squares (Ipls) Regression Winarto Winarto; Meinilwita Yulia
Jurnal Ilmiah Teknik Pertanian - TekTan Vol 6 No 1 (2014)
Publisher : Jurusan Teknologi Pertanian

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.25181/tektan.v6i1.855

Abstract

The objectives of this research was to evaluate the feasibility of using NIR spectroscopy and interval partial least squares (iPLS) regression for nondestructive soluble solids content (SSC) determination in snake fruit. Spectra of snake fruit were acquired using a VIS-NIR USB4000 portable spectrometer in absorbance mode. The SSC was measured using a digital refractometer.  The calibration and validation models were developed using the iPLS regression using original spectra. The calibration results showed that the root mean square of cross-validation (RMSECV) of first six subintervals from 582-831 nm was lower than that of the average of RMSECV and these subintervals were selected for developing final iPLS regression. Using the selected subintervals the calibration has high quality of prediction with RPD = 3,35. Keywords: NIR spectroscopy, soluble solids content, absorbance mode, nondestructive   method, snake fruit, iPLS regression
Rancangbangun Alat Press Baglog Jamur Dua Silinder Dengan Penggerak Motor Listrik Fajri Husna; Fiqi Al Hidayat; Muqorrobin Muqorrobin; Yose Sebastian; Meinilwita Yulia
Jurnal Ilmiah Teknik Pertanian - TekTan Vol 7 No 3 (2015)
Publisher : Jurusan Teknologi Pertanian

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.25181/tektan.v7i3.863

Abstract

Mushrooms are plants that have a nucleus, spores, no chlorophyll and are heterotrophic. Mushrooms can not produce their own food, they get nutrition by way of absorption. Nutrients are absorbed from the mushrooms existing in the organic material in which they live (Alexopoulos and Mims, 1996). Baglog is a media into the growth of mushrooms which comprises a mixture of basic materials such as wood sawdust, rice bran, limestone and so on. The mixture will be allowed to stand for 2-3 days so that all the materials decompose properly. All the material that has decomposed properly inserted into the plastic which will then be compacted. This media must be completely solid to support the growth of mushrooms. Compaction is done by using a press baglog mushrooms (Sunarmi and Saparinto, 2010). Keywords: mushroom baglog, two cylinder, electric motor
Rancang Bangun Alat Tanam Benih Kangkung Darat (Ipomoea Raptana Poir) Nasichin Nasichin; Fajarsukoco Fajarsukoco; Duta Satria; Yose Sebastian; Meinilwita Yulia
Jurnal Ilmiah Teknik Pertanian - TekTan Vol 12 No 2 (2020)
Publisher : Jurusan Teknologi Pertanian

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.25181/tektan.v12i2.1914

Abstract

Kale spinach is a type of vegetable that is widely consumed by people in Indonesia. It’s contains protein, carbohydrates, calcium, iron, sodium, phosphorus, fiber, vitamins A and C. The kale spinach is a low-calorie vegetable. The purpose of this research is to design kale spinach seed planting tool with a semi-mechanical system which power comes from human power, this tool is operated by pulling a lever on the tool so that the tool can work. After the manufacture of kale seed planting is complete, the authors test the performance of the tool capacity, and from the results of the performance test of this tool it can be concluded that it can work well. The results of the performance test of the capacity of this tool to plant water spinach seeds with an area of 0.0005 ha takes 0.007 hours with an average speed of 0.2 m/s, the average seeds that fall per hole are 3 seeds, 98.6% efficiency, The theoretical capacity is 0.072 ha/hour, the effective capacity is 0.071 ha/hour, the percentage of growth is 95%, the average distance between plants is 10 cm, and the average distance between rows of plants is 10 cm.
Autentikasi Cepat Kopi Spesialti Arabika Java Preanger Kultivar Typica, Sigarar Utang dan Yellow Bourbon Menggunakan Spektroskopi UV dan Metode PLS-DA Meinilwita Yulia; Kurnia Rimadhanti Ningtyas; Slamet Widodo; Diding Suhandy
Jurnal Keteknikan Pertanian Vol. 11 No. 1 (2023): Jurnal Keteknikan Pertanian
Publisher : PERTETA

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.19028/jtep.011.1.1-15

Abstract

Kopi spesialti arabika Java Preanger kultivar Typica, Sigarar Utang, dan Yellow Bourbon saat ini tersedia di pasar kopi premium dengan harga mahal dan saat ini menjadi salah satu target pemalsuan kopi. Penelitian ini bertujuan untuk mengevaluasi aplikasi metode spektroskopi UV dan metode PLS-DA (partial least squares-discriminant analysis) untuk autentikasi cepat kopi spesialti arabika Java Preanger dengan tiga kultivar berbeda. Sampel kopi bubuk spesialti arabika dan robusta disiapkan sebanyak 550 sampel dengan berat 1 g untuk setiap sampel. Seluruh sampel diekstraksi dengan prosedur standar dan diencerkan dengan perbandingan 1:70 (volume/volume). Sampel kopi yang telah diencerkan kemudian diambil sebanyak 3 mL, dimasukkan ke dalam sel kuvet kuarsa, dan diambil spektranya menggunakan alat spektrometer UV-visible di rentang panjang gelombang 190-400 nm dengan interval 1 nm. Hasil PCA spektra hasil pengolahan di panjang gelombang 250-400 nm menunjukkan tiga kultivar kopi spesialti arabika dan kopi robusta dapat dibedakan dengan jelas dan terletak di klaster yang berbeda. Namun kopi spesialti arabika Typica dan Sigarar Utang terletak di klaster yang saling berdekatan dan sebagian sampel saling bertumpuk menunjukkan kedua kultivar kopi arabika tersebut memiliki kemiripan. Hasil PLS-DA spektra hasil pengolahan di panjang gelombang 250-400 nm menunjukkan model klasifikasi yang dibangun dapat digunakan untuk klasifikasi kopi robusta dan kopi arabika dengan tiga kultivar berbeda dengan akurasi klasifikasi mencapai 97.8 sampai 100%.
Pengembangan produk teh kulit buah kopi dari tiga klon kopi robusta Analianasari Analianasari; Dayang Berliana; Eko Win Kenali; Meinilwita Yulia
AGROINTEK Vol 17, No 4 (2023)
Publisher : Agroindustrial Technology, University of Trunojoyo Madura

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21107/agrointek.v17i4.17150

Abstract

Coffee skin is a waste from green coffee production as much as 40-45% which has the potential as a source of natural antioxidants. The diversity of local Robusta coffee clones in West Lampung as raw materials for the processing of coffee products provides a variety of coffee skins which are thought to have strong antioxidant activity which is useful as a functional drink for coffee skin tea (cascara).The aims of the study werestudy aimed of the study were to identify the sweetness level of coffee cherries skin from three local coffee robusta clones (rope, huerona, and srintil), identify antioxidant activity, test consumer preferences, and calculate the added value of coffee skin tea (cascara). The research method uses DPPH antioxidant activity analysis, consumer preference test (organoleptic hedonic test), and the calculation of added valueadded value calculation using the Hayami method. The results showed that the antioxidant activity of the Rope clone had strong antioxidant activity, the cascara drink on the level of aroma, taste, and liking for cascara tea found no difference between samples based on analysis of variance, but. Still, the cascara drink from the Rope clone had a darker color. The added value generated by the cascara is IDR 27,941 per kilogram of raw materials used
Co-Authors Analianasari Analianasari Asnaning, Aniessa Rinny Cicih Sugianti Dayang Berliana Dayang Berliana Diding Suhandy Duta Satria Eko Win Kenali Fajarsukoco Fajarsukoco Fajri Husna Fiqi Al Hidayat Kusumiyati Muqorrobin Muqorrobin Naoshi Kondo Nasichin Nasichin ningtyas, Kurnia rimadhanti Sapto Kuncoro Shintawati Shintawati Siti Suharyatun Slamet Widodo Sri Waluyo Winarto Winarto Yose Sebastian Yuichi Ogawa