The Dextrin Production as a Modified Starch from Cassava through Hydrolysis of α-Amylase Enzyme

ABSTRACT Cassava contains a very high water content (± 60%), therefore if it is not immediately processed further, after 3 days it will cause browning, softening, and rot. To overcome this problem, it can be done by processing fresh cassava into dried products such as cassava, flour, and starch (tapioca flour). Natural starch (unmodified) has several disadvantages including: it takes a long time in cooking, the paste is formed hard and not clear, besides that it is too sticky. Therefore development of dextrin (modified starch) making technology from tapioca flour through hydrolysis using α-amylase enzymes is expected to produce the texture characteristics of processed products that are softer, more blooming, and have a sweet aroma. To obtain dextrins that have superior properties, it is necessary to study the factors that influence the process of making dextrins, including variations in the temperature of liquification, 80, 95, and 110oC and variations in the time of liquification, 45, 60, 75 and 90 minutes. The parameters observed were characteristic analysis for cassava starch (native) and dextrin products (modified starch). Characteristics of cassava starch tests included sugar content, amylose content, amylopectin, ash content, moisture content, and yield. Dextrin analysis included reducing sugar content, water content, ash content, and yield. The optimum condition of modified starch was achieved at 80oC liquification condition for 90 min obtained an average water content of 3.83%, 17.2% reducing sugar content with a yield of around 63.37%.Keywords: cassava, dextrin, hydrolysis, alpha amylase enzym

PENERAPAN TEKNOLOGI OLAHAN NIRA AREN DI DESA TIMBUSENG KEC. PATTALLASSANG KAB. GOWA

PENERAPAN TEKNOLOGI  OLAHAN NIRA AREN DI DESA TIMBUSENG KEC. PATTALLASSANG KAB. GOW

PEMANFAATAN POLIFENOL HASIL EKSTRAKSI DARI DAUN KETAPANG SEBAGAI BIOREDUKTOR PEMBUATAN NANOPARTIKEL TiO2.

PEMANFAATAN POLIFENOL HASIL EKSTRAKSI DARI DAUN KETAPANGSEBAGAI BIOREDUKTOR PEMBUATAN NANOPARTIKEL TiO2

REUSE LIMBAH CANGKANG KERANG KEPAH (Polymesoda erosa) SEBAGAI BIOMATERIAL KALSIUM OKSIDA

REUSE LIMBAH CANGKANG KERANG KEPAH (Polymesoda erosa) SEBAGAI BIOMATERIAL KALSIUM OKSID

SINTESIS DAN KARAKTERISASI POLIELEKTROLIT KOMPLEKS (PEC) KITOSANPEKTIN SEBAGAI MATRIKS FILM INDIKATOR pH

Polyelectrolyte complex (PEC) was formed by the ionic interaction between the polyanion of pectin and polycation ofchitosan. The electrostatic attraction between the amino group bonding (-NH3+) of protonated chitosan and carboxyl acidbond (-COO-) deprotonated from pectin is the main interaction of the formation of PEC chitosan-pectin. The purpose ofthis research is to synthesize and characterize PEC chitosan-pectin for application as a pH indicator. The comparison ofsolution chitosan 3% to pectin 3% (b/v) are 0, 10, 30, 50, 70, 90 and 100% at pH 4. The process of synthesis PEC filmhas used the ultrasonic method. The product of polyelectrolyte complex chitosan-pectin can be synthesized by indirectmethods at pH 4. The difference in the characteristics of the PEC chitosan-pectin of various polymer composition andprovenance are indicated with the analysis of functional group analysis, thermal analysis, swelling and color analysis

Synthesis and Characterization of TiO2 Nanoparticle as Adsorbent on The Treatment of Methylene Blue Dye Pollutant

The dye of methylene blue (MB) is organics pollutant from chemical industries. The parameter of MB content are available as methylene blue active substance (MBAS) do not exceed 200 µg/L.  The treatment of MB dye pollutant can be done by adsorption process with TiO2 nanoparticle. This aim of this research was synthesized of TiO2 nanoparticle using PVA as surfactant and titanium tetraisoproxide (TTIP) as titanium source through sol-gel preparation to hydrothermal process at temperature 400 and 600oC. The result of XRD spectrum was shown the tetragonal crystal, the phase of anatase, and the size of particle was 1.66 to 3.15 nm. Infrared spectroscopy of Ti-O functional group was at 467 cm-1 and there were hydroxyl groups of the surface TiO2. DSC analysis was indicated the thermal stability of TiO2 at 250oC. Application of TiO2 nanoparticle as an adsorbent to photodegradation of MB with Hg lamp 150 watt during 60 minutes. The highest of adsorption capacity at the sample TiO2-600 was 217 mg/g and effectiveness adsorption was 81%. Isoterm adsorption process of MB by TiO2 nanoparticle can be obtained with Langmuir and Freundlish equation, with the determined coefficient value were close to 1. These results suggest of TiO2 nanoparticle was indicated highly potential to apply for the treatment of pollutant industries

PREPARASI DAN KARAKTERISASI TITANIUM DIOKSIDA (TiO2) MESOPORI SEBAGAI ADSORBEN LOGAM Cu(II) DAN METHYLENE BLUE

Titanium dioxide (TiO2) is a mesoporous materials having pore size diameter 2-50 nm, pore structure uniform,large surface area, and uniform of pore size distribution. The purpose of this research is to synthesize TiO2 mesoporousmaterials using hydrothermal method, titanium tetra isopropoxide (TTIP) as a precursor and pluronik 123 (P123) assurfactant agent for the pore-forming template. The products of TiO2 mesoporous has analyzed using the Brunauer-Emmet-Teller (BET) methode, FTIR, XRD and DSC. The results of these analyses of surface area and pore sizedistribution were 121 m2/g, pore volume 0.173 cc/g and pore diameter of 9.46 nm. The results of XRD analysis show thetetragonal structure and anatase phase. TiO2 mesoporous was generated the amount of Cu(II) adsorption were 450 mg/gfor 60 minutes and the amount of methylene blue adsorption were 96 mg/g for 60 minutes

ADSORBSI LOGAM Cu(II) DAN METHYLEN BLUE MENGGUNAKAN SILIKA MESOPORI SBA-15

In this study, the synthesis of mesoporous silica SBA-15 via hydrothermal treatment has been investigated byusing Pluronik 123 as a direct structure agent and TEOS as precursor. Characterization was carry out through BETmethode to calculate surface area, pore diameter, and pore volume. The results showed that the surface area of SBA-15948 m2/g, pore volume 1.305 cc/g and pore diameter 55 Å. The maximum percentage removal of Cu(II) and methyleneblue were 78% and 76%, respectively. The amount of capacity adsorption of SBA-15 were 76,4 mg/g for MB and 1532mg/g for methylene blue. The present investigation introduced a new material silica mesoporous SBA-15 as an efficientadsorbent for removal of Cu(II) and methylene blu

PKM PENGUATAN SISTEM PEMASARAN UKM NAYA’S FOOD KULINER KHAS MAKASSAR DI KAB. GOWA

PKM PENGUATAN SISTEM PEMASARAN UKM NAYA’S FOOD KULINER KHAS MAKASSAR DI KAB. GOW

PREPARASI DAN KARAKTERISASI EKSTRAK SILIKA DARI SEKAM PADI

PREPARASI DAN KARAKTERISASI EKSTRAK SILIKA DARI SEKAM PAD