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All Journal Jurnal Informatika Universitas Pamulang Jurnal Ilmiah Teknik Kimia Jurnal Saintika Unpam : Jurnal Sains dan Matematika Unpam Jurnal Teknologi
Untung Nugroho Harwanto
Universitas Pamulang
Chemical Engineering, Chemistry & Bioengineering Chemistry Civil Engineering, Building, Construction & Architecture Computer Science & IT Decision Sciences, Operations Research & Management Electrical & Electronics Engineering Mathematics Mechanical Engineering Physics

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Analisis Pengolahan Limbah Padat Tahu Terhadap Alternatif Industri Pangan Sosis (Grade B) Ibnu Sina; Untung Nugroho Harwanto; Zakki Rosmi Mubarok
Jurnal Ilmiah Teknik Kimia Vol 5, No 1 (2021): JURNAL ILMIAH TEKNIK KIMIA
Publisher : Program Studi Teknik Kimia, Universitas Pamulang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.32493/jitk.v5i1.9193

Abstract

Literature studies show that the nutrient content in tofu pulp is still high; however the utilization of this waste is still relatively low by the community. Nowadays, tofu dregs is still widely used as an ingredient for animal feed. Some of the reasons why people don't take advantage of tofu waste are consits of the funding, equipment, time and worries related to starting their own business. The aims of this study is to make a pre-designed tofu dregs processing plant into a multipurpose product aggregate such as sausages driven by the tofu business community. The method stage in this research is making a feasible product and process scheme, analyzing tofu solid waste in the form of a paper project and making a household scale sausage production prototype. The results of this study are able to produce a role model for tofu dregs utilization which is more  conomically valuable but still meet the standard and quality of reasonableness. The results of the role model will be disseminated by reaching out to tofu entrepreneur communities to collaborate with each other so that the utilization of tofu with high economic value can be carried out more massively, structurally and systematically.
WHAT MAKES INTRODUCTORY PHYSICS DIFFICULT? Untung Nugroho Harwanto
JURNAL SAINTIKA UNPAM Vol 2, No 1 (2019)
Publisher : Program Studi Matematika FMIPA Universitas Pamulang

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (327.869 KB) | DOI: 10.32493/jsmu.v2i1.2916

Abstract

The purpose of this study was to make an investigation what makes physics difficult. Students from different islands in Indonesia who were taking a preparation course in South Tangerang were taken into account of survey. A yes-no answer questionnaire was prepared in order to get the students perception toward physics. The questionnaire was given to approximately 115 students in the middle of the semester. The students were asked to full fill a questionnaire through what makes introductory physics difficult. We found that factor related to the nature of physics is taking part as the maximum percentage on the reason why physics considered as a difficult subject. But factor related to the courses is taking part as the minimum percentage on the reason why physics considered as a difficult subject. The female and male students mostly agreed that the factor related to the nature of physics and took more than fifty percent. Lack of physics background, lack of previous experience and working only assigned problem have the high percentage as the part of student controlled factor. Physics is cumulative subject and physics required good mathematics both are taking high percentage related to the nature of physics.
Perancangan dan Penerapan Sistem Kendali Marketing pada Industri Air Minum dalam Kemasan Berbasis Customer Relationship Management Ali Maddinsyah; Untung Nugroho Harwanto; Rifkah Akmalina; Risza Putri Elburdah
Jurnal Informatika Universitas Pamulang Vol 7, No 4 (2022): JURNAL INFORMATIKA UNIVERSITAS PAMULANG
Publisher : Teknik Informatika Universitas Pamulang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.32493/informatika.v7i4.26470

Abstract

The demand of drinking water is growing continuously, so that the business prospects are also increasingly promising. This condition becomes a challenge for business doer of drinking water, including CV. Tirta Sasmita. A manual customer data management in CV. Tirta Sasmita causing most of customer data are not well documented, so that it may reduce the number of customers. Customer relationship management (CRM) that consists of human resources, process, and technology is a strategy which can be implemented to improve the customer service to be more effective. This research aims to design a CRM-based application that can be used in marketing control system for business doer of drinking water CV. Tirta Sasmita. This research used qualitative approach method, with descriptive research to arrange a business process flow, and action research to design CRM application using Unified Modelling Language (UML) and interface design. This application was developed using prototype method, in which customer database inside are beneficial to ease the remarketing activity. ‘Add order’ menu in CRM application system is also beneficial in terms of sales trends. There are seven access rights in the application which are based on business process flow of CV. Tirta Sasmita, namely sales counter, field sales, supervisor marketing, manager marketing, finance, surveyor, and legal. This system can be implemented based on process business in CV. Tirta Sasmita.
Effect of Solid-to-Solvent Ratio and Maceration Time on Extraction Yield and Physicochemical Properties of Turmeric (Curcuma longa L.) Extract: Curcuminoid Characterization by HPLC Irman Ansari Adlin; Rusnia Junita Hakim; Untung Nugroho Harwanto; Wiwik Indrawati; Annisa Mayesti; Mela Rosiana Ariesti
Jurnal Teknologi Vol 26, No 2 (2026): Agustus 2026
Publisher : Politeknik Negeri Lhokseumawe

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30811/teknologi.v26i2.9063

Abstract

Curcuma longa L. is a major source of curcuminoids, bioactive compounds known for their antioxidant, anti-inflammatory, and antimicrobial activities. The efficiency of curcuminoid extraction is governed by key process parameters, particularly the solid-to-solvent ratio and extraction time. This study evaluated the effects of these parameters on extraction yield and physicochemical properties of turmeric extract, followed by curcuminoid characterization using high-performance liquid chromatography (HPLC). A factorial experimental design was employed using 96% ethanol as the extraction solvent. Maceration was performed at solid-to-solvent ratios of 1:7, 2:7, and 3:7 (w/v) for 24, 48, and 72 h. Extraction yield, pH, viscosity, and density were determined, while curcuminoid content was analyzed in the selected extract using HPLC. Data were analyzed using two-way ANOVA at a 95% confidence level. Both solid-to-solvent ratio and maceration time significantly affected extraction yield, pH, viscosity, and density (p 0.05). Significant interaction effects were observed for pH and viscosity, whereas no significant interaction effects were found for extraction yield and density (p 0.05). The highest extraction performance was obtained at a solid-to-solvent ratio of 3:7 (w/v) and a maceration time of 72 h, resulting in an extraction yield of 16.37%, pH of 7.01, viscosity of 148.00 cP, and density of 1.0497 g/mL. HPLC analysis revealed a dominant curcumin peak at a retention time of 5.11 min and a curcuminoid content of 17,964.24 mg/kg (1.80% w/w). These findings demonstrate that increasing the solid-to-solvent ratio and extending maceration time improve extraction performance and influence the physicochemical characteristics of turmeric extract. 
Co-Authors Annisa Mayesti Ibnu Sina Irman Ansari Adlin Mela Rosiana Ariesti Rifkah Akmalina Risza Putri Elburdah Rusnia Junita Hakim Wiwik Indrawati Zakki Rosmi Mubarok