To elucidate the pretreatment of a heat moisture treatment that could increase the DS and hydrophobicity of OSA starch, the effect of the moisture level of the HMT process on the physicochemical properties was investigated. The higher moisture content (MC) in the HMT process led to a decreasing degree of crystallinity and gelatinization enthalpy and also produced surface damage and cracking of the granules. HMT pretreatment with the right moisture content resulted in OSA starch with the maximum DS value and reaction efficiency. Pre-treatment HMT at 25% MC (HMT-25) followed by OSA esterification exhibited the highest DS value (0.0086) and reaction efficiency (35.86%). H25-OSA starch has been shown to have good water resistance (OAC 1.03%, WVP 4.92 × 10−5 g/s m Pa, water contact angle 88.43°), and conversely, has a high cold water solubility (8.44%). Based on FTIR, there were two new peaks at 1729 and 1568 cm−1 of the HMT-OSA starch, which proved that the hydroxyl group of the HMT starch molecule had been substituted with the carbonyl and carboxyl ester groups of OSA.

Native Sago starch is difficult to be used in industry because of the limitations of its properties. The aim of this research was to study effect of UV-C photo-oxidation on chemical properties and baking expansion of sago starch. Five slurry ratio (starch : water ratio): 1:2; 1:4; 1:6; 1:8; and 1:10 were oxidized with UV-C irradiation for 20 minutes, and then compared with native sago starch. The results showed that UV-C photooxidation increased amylose content and paste viscosity, but decreased swelling power and solubility, and carbonyl and carboxyl content. Used of UV-C as a photooxidator was effective in increasing baking expansion characteristic, and the best slurry ratio was 1:6, which has 6.97 ml/g specific volume or 33.7% higher than that of native sago starch (5.22 ml/g)

Egg roll merupakan sejenis makanan ringan yang banyak disukai oleh anak-anak sampai dewasa, memiliki rasa manis dan gurih, dengan tekstur yang renyah, dan berbentuk gulungan utuh. Umumnya egg roll yang terbuat dari tepung terigu memiliki tekstur yang mudah rapuh, sehingga untuk mengurangi tingkat kerapuhannya dapat dilakukan dengan menambahkan tepung terigu dengan ppati pada formula egg roll. Tujuan dari penelitian ini adalah untuk mengetahui pengaruh penambahan pati sagu terhadap karakteristik egg roll dan menentukan formulasi terbaik egg roll berbasis pati sagu.. Penelitian ini menggunakan rancangan acak lengkap faktor tunggal dengan 5 formulasi variasi perbandingan tepung terigu dan pati sagu. Produk egg roll yang dihasilkan dari kelima formulasi tersebut dilakukan analisa warna, tekstur, organoleptikc dan komposisi kimianya. Makin tinggi konsentrasi pati sagu maka egg roll menjadi berwarna kemerahan, kekerasan dan kerenyahan menjadi menurun, namun tekstur egg roll menjadi tidak rapuh. Semakin tinggi konsentrasi pati sagu, maka kadar air, karbohidrat dan pati resisten egg roll semakin meningkat namun kadar lemak dan protein egg roll semakin menurun. Perlakuan terbaik diperoleh dari formula 100% pati sagu dengan karakteristik fisik egg roll yang dihasilkan yaitu nilai kekerasan 21,96 N, kerenyahan 31,52 Nmm, dan kerapuhan 4,90 N, serta komposisi kimia egg roll yaitu kadar air 4,73%, kadar protein 7,87%, kadar karbohidrat 56,77%, kadar abu 1,42%, kadar lemak 33,94% dan RS (resistant starch) 0,98%. Egg roll berbasis pati sagu dapat diterima oleh panelis dengan nilai terhadap atribut keseluruhan tertinggi yaitu 6,03. Kesimpulannya, pati sagu dapat digunakan dalam formula pembuatan egg roll. Physicochemical and Sensory Properties of Egg roll BasedSago StarchAbstractEgg roll is a snack which were favored by children and adults, it has a sweet and savory taste, with a crunchy texture, and in the form of whole rolls. Generally, egg roll made from wheat flour which has brittle texture, and to reduce its fragility, starch addition in egg roll formula may be applied. The purpose of this study was to determine the effect of sago starch addition to egg roll formula on the characteristics of egg roll and determine the best formula. This study used a single randomized complete design with 5 formula using various ratio of wheat flour and sago starch. Egg roll products were analyzed for color, texture, organoleptic, and chemical composition. The higher the concentration of sago starch, the reddish egg roll, hardness that was appeared and the decrease in crispness was detected, and resulting in the reduction in the brittleness. The higher the concentration of sago starch might increase the water content, carbohydrate and resistant starch of egg roll but the not for fat content and protein. The best treatment was the formula with 100% sago starch with the physical characteristics of the egg roll produced with the hardness value of 21.96 N, crispness of 31.52 Nmm, fragility of 4.90 N, water content of 4.73%, protein content of 7.87%, carbohydrate content of 56.77%, ash content of 1.42%, fat content of 33.94% and RS (resistant starch) of 0.98%. Egg roll based sago starch could be accepted by panelists with the highest overall attribute value of 6.03. As conclusion, sago starch might able to apply in the production of egg role.

Modifikasi pati dapat dilakukan melaluireaksi oksidasi menggunakan hidrogen peroksida (H2O2) dan dikatalisis irradiasi UV-C. Tujuan dari penelitian ini adalah untuk mengetahui pengaruh konsentrasi H2O2  dan waktu irradiasi UV-C terhadap sifat fisikokimia tapioka teroksidasi. Penelitian ini mengunakan rancangan acak lengkap faktorial yaitu konsentrasi H2O2 (1%, 2%, dan 3%) dan waktu irradiasi (5, 10, dan 15 menit).  Faktor-faktor yang berpengaruh terhadap reaksi oksidasi dikaji dalam penelitian ini meliputi kadar karbonil, karboksil, amilosa, sifat pasta, daya pengembangan dan kelarutan pati. Perlakuan konsentrasi hidrogen peroksida dan waktu irradiasi UV berpengaruh terhadap karakteristik fisikokimia tapioka teroksidasi. Makin tinggi konsentrasi hidrogen peroksida, maka kadar karbonil, amilosa, dan viskositas pasta pati oksidasi yang dihasilkan lebih rendah. Sedangkan makin lama waktu irradiasi UV C, kadar karbonil, dan viskositas pasta pati oksidasi yang dihasilkan lebih rendah, namun kadar karboksil yang dihasilkan meningkat kemudian menurun dengan makin lamanya irradiasi. Kadar karbonil tertinggi diperoleh dari perlakuan H2O2 3%, waktu irradiasi 5 menit sebesar 0,56% dengan viskositas puncak 2800 cp, viskositas akhir 1500 cp, kadar amilosa 23,67% (bk), swelling power 37,23%, kelarutan 28,89%. Sedangkan kadar karboksil tertinggi diperoleh dari perlakuan H2O2 1%, waktu irradiasi 10 menit sebesar 0,33% dengan viskositas puncak 4250 cp, viskositas akhir 3005 cp, kadar amilosa 24,73% (bk), swelling power 31,92%, dan kelarutan 21,55%.