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Kopi spesialti arabika dijual dengan harga lebih mahal dibandingkan dengan kopi robusta. 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 (Typica, Sigarar Utang, dan Yellow Bourbon) dan robusta disiapkan sebanyak total 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 (Genesys UV-visible spectrometer, Thermo Fisher, Scientific, USA) di rentang panjang gelombang 190-400 nm dengan interval 1 nm. Hasil PCA spektra transformasi 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 transformasi di panjang gelombang 250-400 nm menunjukkan model klasifikasi yang dibangun dapat digunakan untuk klasifikasi kopi robusta dan kopi arabika dengan tiga kultivar berbeda (Typica, Sigarar Utang, dan Yellow Bourbon) dengan akurasi klasifikasi mencapai 97.8 sampai 100%. Hasil ini menunjukkan potensi penggunaan metode spektroskopi UV untuk autentikasi cepat kopi spesialti arabika Java Preanger Typica, Sigarar Utang, dan Yellow Bourbon.

Chitosan and chitosan modified carboxymethyl were used to enhance performances of paper packaging. Chitosan 1.0 wt% and chitosan modified carboxymethyl solutions with concentrations of 0.25; 0.5 and 1.0 wt% were manually applied on paper surface using dip coating method. Effects of chitosan coatings on antibacterial properties of the paper were investigated. The antimicrobial activity of chitosan against gram-positive (Staphylococcus aureus) and gram-negative bacteria (Escherichia coli) was found to be enhanced when chitosan and chitosan modified carboxymethyl solution were entrapped within paper. Further paper coated chitosan and chitosan modified carboxymethyl has higher antibacterial activity againt S. aureus rather than E. coli. Keywords: Chitosan carboxymethyl, antibacterial agent, paper packaging

Composite paper is paper made from a mixture of two or more kinds of paper pulp with other materials. The manufacture of composite paper in this study uses OPEFB as the basic material mixed with coconut fiber and uses cassava flour and banana flour as adhesives. Parameters observed in this study were physical and mechanical properties, cellulose, hemicellulose, and lignin from OPEFB composite paper and coconut fiber. Based on the results of this study, the highest mechanical physical properties of paper were thickness, grammage, and density with the addition of 20 gram cassava adhesive (1, 38 mm, 41, 78 g/m2, 0, 30 kg/m3 respectively) while the addition of banana flour had the highest mechanical physical properties at addition of 60 grams with thickness, grammage, and density (1, 49 mm, 45, 60 g/m2, 0, 30 kg/m3 respectively). As for the chemical characteristics of the paper on the adhesive cassava flour has the highest cellulose content in the addition of 20 grams of cassava flour (50, 83 %), while the treatment with the addition of banana flour has the highest cellulose content in the treatment of 60 grams (46, 76 %).

Limbah hasil pertanian merupakan sumber serat yang sangat besar. Limbah hasil pertanian banyak terdapat di Provinsi Lampung antara lain adalah jerami padi dan jagung. Pemanfaatan limbah pertanian merupakan salah satu solusi untuk mendapatkan material penghasil selulosa. Nanoselulosa merupakan salah satu pemanfaatan dari selulosa yang sangat bermanfaat bagi kehidupan. Nanoselulosa dapat dibagi menjadi 3 tipe utama yaitu selulosa nanokristal, selulosa nanofibril, dan nanoselulosa bakterial. Nanoselulosa memiliki diameter 1-100 nm dan panjang 500-2000 nm. Beberapa teknik dikembangkan untuk mengekstrak nanoselulosa dari selulosa diantaranya hidrolisis asam, hidrolisis enzimatis, dan proses mekanis. Adapun penggunaan masing-masing metode ekstraksi dimungkinkan menghasilkan tipe dan properti nanoselulosa yang berbeda. Penelitian ini bertujuan untuk melakukan sintesis nanoselulosa dari limbah hasil pertanian dengan berbagai konsentrasi asam untuk menghasilkan selulosa dengan ukuran nano terbaik berkisar antara 1 – 100 nm. Variasi konsentrasi H2SO4 yang digunakan yaitu 45%, 55%, dan 65%. Dari penelitian ini menghasilkan serbuk selulosa dengan ukuran nano yang bervariasi. Ukuran nanoselulosa yang dihasilkan berkisar antara 356,5 nm – 764,2 nm untuk limbah jerami padi, dan 422,6 nm – 634,0 nm untuk limbah kulit jagung

Codot coffee from Tanggamus, Lampung is one of Indonesian specialty coffee with a very limited production. In this research, an authentication study for the Codot ground roasted coffee was conducted using UV-vis spectroscopy and chemometrics. A total of 330 samples of pure and adulterated Codot coffee was prepared. The adulterated Codot coffee samples were intentionally created by adding a regular coffee (non-Codot coffee) into pure Codot coffee samples with three levels of adulterations: low (10-20%), medium (30-40%), and high level (50-60%). All samples were 0,29 mm in particle size. The extraction procedure was performed with hot distilled water (98°C). The spectral data of coffee samples were acquired using a benchtop UV-visible spectrometer in the range of 190-1100 nm using a transmittance mode. The result showed that the pure and adulterated samples could be discriminated along PC1 and PC2 axis. The classification model was developed using LDA with 90,91% of accuracy could be obtained. The LDA model was used to classify the new samples and resulted in a sensitivity (SEN) of 100%, specificity (SPEC) of 76,67%, precision (PREC) of 78,13%, and accuracy (ACC) of 87,27% could be obtained. Using PLS regression, a PLS model was developed to quantify the percentages of Codot coffee adulteration and resulted in high of coefficient of determination both in calibration and validation (R2kal = 0,99 and R2val = 0,98). These results showed that UV-vis spectroscopy and chemometrics are suitable for authentication of Codot specialty coffee with RMSEP = 2,68% and RPD in prediction of 6,49. Keywords: authentication, LDA, PCA, PLS regression, UV-vis spectroscopy

Paper consumption in Indonesia in 2003 reached 5.31 million tons, in 2004 the need for paper consumption reached 5.40 million tons. Meanwhile, in 2005, paper consumption reached 5.61 million tons and in 2009 it reached 7.50 million tons, and this figure continues to increase by 3% - 4% every year. The increase in consumption and the paper industry in Indonesia will be accompanied by an increase in the need for the main raw material for pulp and paper, namely wood so that environmental damage will occur. Alternative materials other than wood which contain cellulose and can be used for pulp and paper manufacture are Empty Palm Fruit Bunches (EFB) and coconut fiber. Mixed fiber paper or often called composite paper, is paper made from a mixture of two or more kinds of paper pulp with other materials. Composite paper can be made using the pulp of EFB mixed with coconut fiber using a banana peel binder. This study aims to determine the mixture of EFB pulp, coconut coir pulp, and banana peel binder so that it can be obtained mixed fiber paper with tear resistance and tensile strength which is most suitable to be applied as an alternative to packaging paper. Based on the pulp produced from research that has been carried out, the cellulose content ranged from 46,4316% until 48,4993%, and hemicellulose ranged between 18,2699% until 20,7593%. With a high cellulose content, samples of EFB raw materials and coconut fiber can be used as raw materials for making paper.

Flakes atau sereal merupakan makanan sarapan yang banyak digemari masyarakat, karena flakes mudah untuk digunakan. Flakes umumnya dibuat dari bahan baku yang berasal dari golongan serealia dan umbi-umbian, seperti tepung terigu dan tapioka yang merupakan sumber karbohidrat dengan gula, garam dan air (Marsetio, 2006). Inovasi telah dilakukan dalam pengolahan flakes untuk meningkatkan nilai nutrisi dari flakes tersebut. Tujuan dari penelitian ini adalah menentukan formulasi tepung pisang dan labu kuning yang optimal terhadap tekstur flakes berdasarkan tingkat kesukaan konsumen. Penelitian ini akan dilakukan dengan tiga ulangan dan terdiri dari perbandingan tepung pisang dan tepung labu kuning, yaitu: P1 = tepung pisang 70% : tepung labu kuning 0% : tepung terigu 30 %; P2 = tepung pisang 60% : tepung labu kuning 10% : tepung terigu 30%; P3 = tepung pisang 50% : tepung labu kuning 20% : tepung terigu 30%; P4 = tepung pisang 40% : tepung labu kuning 30% : tepung terigu 30%; P5 = tepung pisang 30% : tepung labu kuning 40%. : tepung terigu 30%. Dari hasil pengamatan dan pembahasan dapat disimpulkan bahwa formulasi tepung pisang dan tepung labu kuning dalam pembuatan flakes yang paling disukai oleh konsumen adalah dengan perbandingan tepung pisang 60%, tepung labu kuning 10% dan tepung terigu 30%.