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All Journal Jurnal Sains Teh dan Kina Surya Octagon Interdisciplinary Journal of Science and Technology Journal of Functional Food and Nutraceutical Liaison Journal of Engineering
Tutun Nugraha
Faculty of Life Sciences, Swiss German University, BSD City, Indonesia
Aerospace Engineering Agriculture, Biological Sciences & Forestry Automotive Engineering Chemical Engineering, Chemistry & Bioengineering Computer Science & IT Economics, Econometrics & Finance Engineering Environmental Science Industrial & Manufacturing Engineering Mechanical Engineering Nursing Social Sciences Other

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Preservation of fish using instant extract of green and black tea Nugraha, Tutun; Fernando, Anthony; Rahardjo, Pudjo
Jurnal Penelitian Teh dan Kina Vol 15, No 1 (2012)
Publisher : Research Institute for Tea and Cinchona

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (341.791 KB) | DOI: 10.22302/pptk.jur.jptk.v15i1.17

Abstract

The use of illegal and hazardous preservative agents such as formalin by traditional fishermen and trader has become a problem in Indonesia.  In this research, instant extract powder of green tea and black tea were used as natural preservatives for fish. Both substances are known for their anti-bacterial and anti-oxidative activities due to the presence of various types of polyphenols, particularly the catechin groups. The tea extract powder was produced  by drying  using a spray drying device. The two different tea extract powders were tested separately, and in combination. The tests were done by dipping pieces of fresh indian mackerel fish (Rastrelliger kanagurta), also known locally as kembung banjar, in the solution containing the tea extract. The microbial tests were done using total plate count (TPC) method. The result showed that instant green and black tea extracts was capable in suppressing bacterial growth in fish. When the two substances were mixed together, the preservation activities were found to be stronger than if they were used separately. In addition, histamine and total volatile base nitrogen (TVB-N) tests which are regularly used to test the freshness of fish also showed substantial improvement in the quality of the fish sample. The sensory tests also showed that the extracts were capable of improving the freshness of the fish sample. 
Bio-degradeable Bioplastics sebagai Plastik Ramah Lingkungan Wijayanti, Kim Poppy; Dermawan, Nathanael; Faisah, Sabila Nur; Prayogi, Vincent; Judiawan, William; Nugraha, Tutun; Listyorini, Niken Taufiqurrahmi
Surya Octagon Interdisciplinary Journal of Science and Technology Vol 1 No 2 (2016): SOIJST
Publisher : Surya University

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Abstract

Massive uses of conventional plastics have brought negative consequences to the aspects of sustainability and environmental friendliness of human activities, due to the problems concerning the availability of its raw materials and eventual wastes. One of the solutions to face these problems is by producing and using plastics that can degrade and be derived from renewable biomasses which are now known as bio-degradeable bioplastics.  At least, there are 4 kinds of plastics that can fulfill the criteria as being bio-degradeable bioplastics, namely starch-based plastic, cellulose-based plastics, PLA (polylactic acid), and PHA (polyhydroxylalkanoates). These four kinds of plastics have different characteristics, applications, strengths, and also weaknesses. In spite of the many challenges  in the uses of  bio-degradeable bioplastics to replace conventional plastics, newest technological development and the birth of stronger public awareness towards a more sustainable and more environmentaly-friendly life style have given stronger stronger forces to increase the uses and urgency of bio-degradeable bioplastics.
A Review of Nanotechnology Application for Seawater Desalination Process Jordan, Evan; Jessica, Jessica; Martin, Martin; Suryajaya, Tommy; Hakeem, Muhammad Hilmy; Nugraha, Tutun; Listyorini, Niken Taufiqurrahmi
Surya Octagon Interdisciplinary Journal of Science and Technology Vol 1 No 2 (2016): SOIJST
Publisher : Surya University

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Abstract

As freshwater resource decreasing rapidly due to high rate of human population growth, many researchers have done studies to develop methods for producing freshwater supply. Seawater desalination is one of the method that has the credibility to be implemented. However, conventional seawater desalination processes suffer from a number of problems related to energy efficiency and cost. In spite of this, nanotechnology has been applied to the process. In this paper, we give an overview and explanations concerning the roles of nanotechnology in seawater desalination processes which consist of pretreatment, reverse osmosis (RO), and disinfection. In addition, the comparisons between conventional and nanotechnology-applied processes as related to its efficiency and effectiveness are also provided.
EXTRACTION OF HYALURONIC ACID FROM ALOE BARBADENSIS (ALOE VERA) Putri, Runita Rizkiyanti; Nugraha, Tutun; Christy, Stephanie
Journal Akademik Universitas Swiss German Vol 1 No 2 (2020)
Publisher : Swiss German University & Perhimpunan Penggiat Pangan Fungsional dan Nutrasetikal Indonesia (P3FNI)

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (542.709 KB) | DOI: 10.33555/jffn.v1i2.33

Abstract

Hyaluronic acid have a high moisture preservation and biocompatibility characteristic, thus allowing various usage of this substance in pharmaceutical, medicinal, and skin care products. Present manufacturing process of hyaluronic acid requires extraction of animal cells or through other methods utilizing bacteria. The aim of this research is to investigate an alternative source of hyaluronic acid extraction using plant based which is aloe vera (A. Barbadensis).  Three main parts of aloe vera (rind, mesophyll and gel) underwent several steps of extraction process and the result was compared to the sample of hyaluronic acid from goat brain. The evaluation including comparison of total carbohydrates, reducing sugars and degradation using heat treatment. The results of extraction were analyzed using UV-Spectrophotometer at 230 nm and compare to the extraction result of goat brain to ensure the presence of hyaluronic acid. It was found out that the rind part of aloe vera have the highest potential of high content of hyaluronic acid.
Speciation of Uranyl Compound at Different pH and Its Precipitation Characteristics in Nitric Acid michael santoso, samgar; gideon effendi, petrick; nugraha, tutun; listyorini, niken; adhi pratama, hendra
Liaison Journal of Engineering Vol. 3 No. 2 (2023): Vol III
Publisher : Liaison Journal of Engineering

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Abstract

Uranyl is one of the most common chemical compounds that can be found in the waste of nuclear plants. As such, understanding the speciation of uranyl is important to ensure that the best waste treatment option is taken to purify the uranyl inside the waste, whether it is through flocculation, evaporation, or other waste treatment option. As most uranyl waste is either acidic or basic, different pH levels would be the basis of measurement for the speciation analysis of uranyl. Neutralizing the pH of the solution turns out to be the best method to separate uranyl compounds. Keywords: Speciation; pH; Uranyl; Solubility; Nitric Acid
Co-Authors adhi pratama, hendra Anthony Fernando, Anthony Christy, Stephanie Dermawan, Nathanael Faisah, Sabila Nur gideon effendi, petrick Hakeem, Muhammad Hilmy Jessica Jessica Jordan, Evan Judiawan, William listyorini, niken Listyorini, Niken Taufiqurrahmi Martin Martin michael santoso, samgar Prayogi, Vincent Pudjo Rahardjo, Pudjo Putri, Runita Rizkiyanti Suryajaya, Tommy Wijayanti, Kim Poppy