Starch granules containing amylopectin-rich fractions like sago starch may remain insoluble and undamaged decreasing properties of the film. The aim of this study is to characterize native sago starch films prepared using ultrasonication. An ultrasonication probe was used during gelatinization for 2.5, 5, and 10 min respectively. Ultrasonication decreases the incomplete gelatinized granules resulting in a film with a more compact structure, and lower moisture vapor permeability than non-treated film. The longest duration resulted in a film with the highest transparency, and the highest thermal resistance. The duration for 5 min increased tensile strength of the film by 227%, and its moisture absorption decreased by 29.83% compared to non-sonicated film. After ultrasonication for 10 min, melting temperature increased by 7% in comparison to non-sonicated film. This work promotes a simple method to improve the tensile and physical properties of starch based film.

AbstrakPenanganan gizi buruk selalu dikaitkan dengan makronutrisi padahal mikronutrisi juga penting. Zink merupakan mikronutrisi yang penting untuk sintesis protein, diferensiasi sel dan pertumbuhan. Kurangnya asupan zink dapat menganggu pertumbuhan. Tujuan penelitian ini adalah menentukan pengaruh pemberian suplemen zink terhadap status gizi anak sekolah dasar. Studi ini adalah true experimental dengan rancangan pre test-post test grup design yang dilakukan selama 3 bulan. Subjek penelitian sebanyak 33 orang dengan usia 7 -9 tahun yang memenuhi kriteria inklusi dan ekslusi. Subjek dibagi menjadi 2 kelompok yaitu kelompok 1 (teratur) 14 orang dan kelompok 2 (tidak teratur) 19 orang. Hasil uji t berpasangan terhadap pengukuran rerata Berat Badan (BB), Tinggi Badan (TB) dan Indek Massa Tubuh (IMT). Pre test dan post test untuk kelompok 1 dan kelompok 2 didapatkan nilai p=0,000 , p=0,000 , p=0,000 , p=0,000, dan p=0,051 , p=0,682. Hasil uji Anova one way terhadap pengukuran BB, TB dan IMT post test diantara kedua kelompok didapatkan nilai p=0,053, p=0,117 dan p=0,211. Simpulan studi ini adalah terdapat perbedaan yang bermakna BB dan TB pre-test dan post-test kedua kelompok namun IMT menunjukan hasil tidak bermakna pada pre-test dan post-test kedua kelompok. Tidak terdapat perbedaan yang bermakna BB,TB, dan IMT antara kelompok 1 dan kelompok 2.Kata kunci: zink, berat badan, tinggi badan, indek massa tubuh AbstractHandling the malnutrition has always associated with macronutrients when micronutrients are also important.Zinc is an important micronutrient for protein synthesis, cell differentiation and growth. The lack of zinc intakes can disrupt growth.The objective of this study was to determine the effect of zinc supplementation on nutrional status of primary school student.This research was true experimental with pre and post test group design. This research was conducted for 3 months. The subjects of this study were 33 students with range of age 7-9 years old who met the criteria of inclusion and exclusion. Subjects were divided into 2 groups: group 1 (routine) with 14 students and group 2 (not routine) with 19 students.The result of paired t-test to analyze weight, height and body mass index means pre and post test for group 1 and group 2 were p=0.000 , p=0.000, p=0.000 , p=0.000andp=0.051 , p=0.682. One Way Anova test results on the measurement of weight, height and BMI post test between the two groups were obtained p = 0.053 , p = 0.117 and p = 0.211. Based on the results of the study, there were significant differences in weight and height pre and post test of both groups but BMI pre and post test of both groupsshowed no significant results. The conclusion is there were no significant differences between weight, height, and BMI between group 1 and group 2.

Penanganan gizi buruk selalu dikaitkan dengan makronutrisi padahal mikronutrisi juga penting. Zink merupakan mikronutrisi yang penting untuk sintesis protein, diferensiasi sel dan pertumbuhan. Kurangnya asupan zink dapat menganggu pertumbuhan. Tujuan penelitian ini adalah menentukan pengaruh pemberian suplemen zink terhadap status gizi anak sekolah dasar. Studi ini adalah true experimental dengan rancangan pre test-post test grup design yang dilakukan selama 3 bulan. Subjek penelitian sebanyak 33 orang dengan usia 7 – 9 tahun yang memenuhi kriteria inklusi dan ekslusi. Subjek dibagi menjadi 2 kelompok yaitu kelompok 1 (teratur) 14 orang dan kelompok 2 (tidak teratur) 19 orang. Hasil uji t berpasangan terhadap pengukuran rerata Berat Badan (BB), Tinggi Badan (TB) dan Indek Massa Tubuh (IMT). Pre test dan post test untuk kelompok 1 dan kelompok 2 didapatkan nilai p=0,000 , p=0,000 , p=0,000 , p=0,000, dan p=0,051 , p=0,682. Hasil uji Anova one way terhadap pengukuran BB, TB dan IMT post test diantara kedua kelompok didapatkan nilai p=0,053, p=0,117 dan p=0,211. Simpulan studi ini adalah terdapat perbedaan yang bermakna BB dan TB pre-test dan post-test kedua kelompok namun IMT menunjukan hasil tidak bermakna pada pre-test dan post-test kedua kelompok. Tidak terdapat perbedaan yang bermakna BB,TB, dan IMT antara kelompok 1 dan kelompok 2

Needs for efficient assembly process has led CV Citra Dragon, a medium-scale manufacturing enterprise of agricultural machinery, to utilize welding jig for assembly one part of thresher component as their high demanding product. That component is thresher’s cover that has the potential for productivity improvement hence cost savings. Due to categorize as a specific work-holding device for particular purpose and conditions, design processes of a welding jig has been carried out. This has resulted in the development of a welding jig for assembly of thresher’s cover. The design of welding jig has been evaluated from possibility to deflect during its operation, and it was identified that deflection magnitude of welding jig construction was relatively low. Thus, it can infer that this welding jig can resist operational loads. Furthermore, the productivity and cost-effectiveness analysis were also conducted to ensure the welding jig having fulfilled the objective of the proposal. The analysis indicated that the assembly process becomes efficient as a welding jig deployed. It was contributed by shortening of assembly cycle times that increase the production rate. Also, affordable cost savings can also be obvious especially for labor cost salary.