Judul: Kajian Stabilitas Komponen Volatil dan Atribut Mutu Sirup Campuran Jahe, Sereh, dan Madu selama Penyimpanan
Abstrak: Ginger (Zingiberofficinale) and lemongrass (Cymbopogoncitratus) are two types of spices which often used as flavoring ingredients in beverages or foods. In these products, honey is sometime added as a sweetener. These spices and honey are known to have functional properties. The aim of this study was to study the stability of volatile components and quality attributes of the best formulation of syrup made from ginger, lemongrass, and honey during storage at room temperature. In the preliminary study, ginger and lemongrass were extracted with water at 60 0C for 10 minutes, filtered and decantation at room temperature to obtain the clear beverages. Different concentrations of syrup formulas were made as follows; ginger extract of 20%, 25% and 30%, and lemongrass extract of 10% and 15% and to each of formula were added 10% of honey. Determination of the best formula syrup based on an organoleptic test and capacity antioxidant. On advance research, the best formula of syrup (25% ginger extract, 15% lemongrass extract, and 10% honey) put in a dark glass bottle then stored at room temperature for 8 weeks and observed every 2 weeks. The observation during storage related quality attribute was include antioxidant capacity, total phenols, total plate count, pH, total titrable acid, total dissolved solids, and viscosity. The quality attribute did not change significantly during storage. The chromatogram of day-0 showed 116 peaks but only 71 peaks could be identified, there were 10 volatile components had an area over 2%. Primary volatile components on syrups were citral, neral, zingiberene, curcumene, β- bisabolene, cineole (1,8), cymene(0-), β-phellandrene, β-sesquiphellandrene, and α-farnesene (E,E.) The area of citral, neral, curcumene, β-bisabolene and cymene decreased during storage, on the other hand the area cineole (1.8), zingiberene, β- phellandrene, β-sesquiphellandrene, and α-farnesene (E,E) increased apparently during storage. Thus, the syrup is potent as functional food.
Keyword: syrup, ginger, lemongrass, honey, quality attribute volatile components

Judul: Product Development of Herbal Ginger Syrup
Abstrak: Jahe merupakan komoditas rempah-rempah yang banyak dikonsumsi dan diketahui manfaatnya, sehingga berpotensi untuk dikembangkan baik dalam pembuatan produk makanan maupun minuman. Selain komponen bahan aktif minyak atsiri, jahe juga memiliki kandungan pati berkisar 45-55% dari bobot rimpang kering. Dalam pembuatan minuman herbal, pati merupakan hasil samping dalam proses ekstraksi bahan aktif. Penelitian ini bertujuan untuk memanfaatkan kandungan pati dengan bantuan enzim alfa amilase serta meningkatkan penerimaan konsumen dengan penambahan rempah-rempah. Metode yang digunakan adalah Human Centered Design (HCD) yang diawali dari identifikasi masalah, verifikasi masalah, ideasi, prototipe, dan verifikasi solusi. Hasil observasi terhadap produk komersial menunjukkan tingkat rasa pedas terbilang rendah dibandingkan tingkat rasa manis pada produk. Prototyping sirup jahe merah dilakukan sebanyak 3 kali. Prototype 1 berdasarkan hasil uji organoleptik sudah menunjukkan beberapa parameter telah sesuai preferensi konsumen, namun masih terdapat beberapa parameter yang perlu diperbaiki. Selain itu, prototype 1 memiliki konsistensi yang kental dan berkabut, terdapat sedikit after-taste pahit, serta setelah disimpan di kulkas selama 24 jam produk membentuk gumpalan keras seperti gel. Prototype 2 telah memiliki konsistensi yang baik, namun rasa pahit yang dihasilkan masih terdeteksi. Hasil uji organoleptik prototype 3 menunjukkan tingkat rasa pedas dan rasa manis telah sesuai dengan preferensi konsumen dengan aroma yang lebih wangi dan manis. Formulasi terpilih sirup jahe merah menggunakan 250 g jahe merah, 125 g gula kristal, 500 g air, dan 35 g rempah-rempah., Product Development of Herbal Ginger Syrup. Supervised by TITI CANDRA SUNARTI. Ginger is a spice commodity that is widely consumed and its benefits are known, so it has the potential to be developed both in the manufacture of food and beverage products. In addition to the active ingredient components of essential oils, ginger also has a starch content ranging from 45-55% of the dry rhizome weight. In the manufacture of herbal drinks, starch is a by-product in the process of extracting the active ingredients. This study aims to utilize the starch content with the help of the enzyme alpha amylase and increase consumer acceptance with the addition of spices. The method used is Human Centered Design (HCD) which begins with problem identification, problem verification, ideation, prototype, and solution verification. The results of observations on commercial products show that the level of spicy taste is relatively low compared to the level of sweetness in the product. The red ginger syrup prototype was carried out 3 times. Prototype 1 based on the results of organoleptic tests has shown that several parameters are in accordance with consumer preferences, but there are still some parameters that need to be improved. In addition, prototype 1 has a thick and cloudy consistency, there is a slight bitter after-taste, and after being stored in the refrigerator for 24 hours the product forms hard lumps like gel. Prototype 2 already has a good consistency, but the resulting bitter taste is still detectable. The results of the organoleptic test of prototype 3 show that the level of spicy and sweet taste is in accordance with consumer preferences with a more fragrant and sweet aroma. The selected formulation of red ginger syrup uses 250 g of red ginger,
Keyword: alpha amylase, red ginger, starch, low sugar, red ginger syrup

Judul: Rancang Bangun Mekanisme Penggetar Untuk Bajak Subsoil Getar Dengan Dua Bilah Bajak
Abstrak: Bajak subsoil merupakan alat pengolahan tanah pertama yang sering digunakan sebelum pembajakan dengan bajak singkal atau bajak piring untuk memecah lapisan keras di lapisan bawah. Alat ini biasanya digunakan pada tanah yang telah mengalamli pemadatan akibat lalu lintas traktor. Alat ini memiliki tahanan tarik yang tinggi dan biasa ditarik traktor empat roda
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