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All Journal Sainteks: Jurnal Sain dan Teknik Inaba of Community Services Journal
Riza Rizkiah
Universitas Insan Cendekia Mandiri
Chemical Engineering, Chemistry & Bioengineering Chemistry Computer Science & IT Decision Sciences, Operations Research & Management Economics, Econometrics & Finance Engineering Industrial & Manufacturing Engineering Languange, Linguistic, Communication & Media Public Health Social Sciences

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Sintesis Nitroselulosa Dari Serat Rami (Boechmerianivea) Menggunakan Trietilamin Riza Rizkiah; Kenny Kencanawati; Ahmad Rosidin; Lingga Wibowo
Sainteks: Jurnal Sain dan Teknik Vol 3 No 1 (2021): Maret
Publisher : Universitas Insan Cendekia Mandiri

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.37577/sainteks.v3i1.231

Abstract

Nitrocellulose is cellulose that is titrated into an ester polymer which can be used as a major component in several types of ammunition and explosives and other materials. Hemp (Boehmeria nivea) is a type of fiber plant that is rich in cellulose and thrives in Indonesia. Until now, the need for nitrocellulose in Indonesia is still imported, even though there is a lot of potential for cellulose that can be exploited, one of which is by synthesizing nitrocellulose from the hemp plant. One of the many uses of nitrocellulose derivatives, one of which is propellant. The propellant is the fuel or power source of a rocket engine. Nitrocellulose that can be used for propellants is nitrocellulose with levels between 11-13.3% nitrogen. This study aims to produce nitrocellulose in levels that meet the standards for making propellants. The study was carried out with a cellulose activation procedure using 20% ​​sodium hydroxide and 1 ml of triethylamine per gram of cellulose. Cellulose nitration was carried out using sulfuric acid and nitric acid with the composition of A (1: 1), B (2: 1) and C (3: 1) which were refluxed for 3 hours. Nitrogen determination was carried out using the Kjeldahl method. The results showed that from 3 samples A, B, and C, nitrogen levels were obtained respectively 12.62%, 13.23%, and 12.97%. This shows that the nitrocellulose from the hemp plant (Boehmeria nivea) can be used for propellants. Keywords: Hemp, nitrocellulose, nitration, triethylamine, propellant
The Influence of Organizational Culture and Organizational Commitment to Employee Work Discipline at the Bandung City Transportation Service Ruli Mochammad Chaerudin; Riza Rizkiah
Sainteks: Jurnal Sain dan Teknik Vol 5 No 2 (2023): September
Publisher : Universitas Insan Cendekia Mandiri

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.37577/sainteks.v5i2.586

Abstract

This study aims to determine whether the variable (X) organizational culture and organizational commitment affect the variable (Y) employee discipline. The data collection method was carried out using descriptive and verification methods through questionnaires distributed to employees of the Bandung City Transportation Office. Samples were taken as many as 40 respondents using Purposive Sampling. The data obtained were then processed using SPSS Version 22 and analyzed using multiple linear regression tools. Based on the research results that have been conducted by researchers, the Ttest test shows that organizational culture has an effect on employee work discipline with a low relationship level of 9.50%, organizational commitment has a positive and significant effect on employee work discipline by 84.10% and the R square test together shows that organizational culture and organizational commitment jointly have a positive and significant effect on employee work discipline of 85.70% while the remaining 14.30% are influenced by other parties not examined.
CROCHET WALLET MAKING TRAINING FOR TEACHERS AND PAUD STUDENTS BAMBIM BAITUL MUTTAQIEN PAUD KEBONLEGA SUB-DISTRICT BOJONGLOA KIDUL CITY BANDUNG Riza Rizkiah; luciana Luciana; Feny Nurherawati; Filly Pravitasari
Inaba of Community Services Journal ( Inacos-J) Vol. 2 No. 01 (2023): Vol. 2 No. 01 (2023): Volume 2 Number 1 June 2023
Publisher : Universitas INABA

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.56956/inacos.v2i01.164

Abstract

Handmade art encompasses various forms of handicraft art created by humans, including knitting. Knitting is a needlework activity that utilizes thread and hook needles. It encompasses different techniques such as embroidery, weaving, crocheting, and knitting itself. Additional activities like lacework, quilting, embroidery, needlepoint, and rugs are also considered part of the knitting realm. Although knitting and crochet are sometimes used interchangeably, they have distinct meanings. Crochet can be created using either manual or mechanical methods, employing a special hook needle to create desired shapes by hooking the thread under the previous loops. Crochet work is known for its textured appearance, with the texture varying depending on the stitches used. Examples of crochet stitches include chains, single crochet, half double crochet, double crochet, treble crochet, double trebles, slip stitch, blocks, picots, cross stitch, clusters, knots stitch, and popcorn stitch.
Co-Authors Ahmad Rosidin Feny Nurherawati Filly Pravitasari Kenny Kencanawati Lingga Wibowo Luciana Luciana Ruli Mochammad Chaerudin