Article Per Year (5 Year)
p-Index From 2020 - 2025
0.751
P-Index
This Author published in this journals
All Journal Jurnal Sains Teh dan Kina Liaison Journal of Engineering
tutun nugraha
Unknown Affiliation
Aerospace Engineering Agriculture, Biological Sciences & Forestry Automotive Engineering Chemical Engineering, Chemistry & Bioengineering Computer Science & IT Environmental Science Industrial & Manufacturing Engineering Mechanical Engineering

Published : 5 Documents Claim Missing Document
Claim Missing Document
Check
Articles

Found 5 Documents
Search

 1 
Comparison Of Red Ginger Dehydration Process Between Oven And Freeze Drying muhammad zacky rizano; tutun nugraha; vanny narita
Liaison Journal of Engineering Vol. 2 No. 2 (2022): Vol 2, No 2, Desember 2022
Publisher : Liaison Journal of Engineering

Show Abstract | Download Original | Original Source | Check in Google Scholar

Abstract

As the tendency towards health awareness has increased, the consumption of dried herbs has risen. The phytochemicals within the plant were known for their health benefits. However, dried herbs in the market these days seemed to lack active compounds. The deficiency of active compounds could be evolving from the dehydration process. The research was established to compare thedehydration process in the dried red ginger (Zingiber officinale var. rubrum) production between freeze drying and oven drying. The oven drying process was done by drying in the oven at 60°C for 24 hours. While the freeze‐drying process was done by freezing the red ginger at ‐60°C for 12 hours, then dried in a vacuum at 25°C. Physical appearance, microstructure, chemical constituents,moisture loss, extraction yield, Total Phenolic Content (TPC), and antioxidant activity were analyzed. The results showed that freeze‐dried seemed to have a light green color while the ovendried had a brownish-yellow color. The freeze-dried appeared to have less volume shrinking as the cell wall in the freeze‐dried was more preserved, which was shown by the SEM imaging. GCMS results conveyed that freeze‐dried looked to have more abundant compounds in higher molecular weight. In comparison, the oven-dried had more abundant in lower molecular weight. Also, the results indicated that there was a significant difference between freeze-dried and oven-dried in total phenolic content. However, there were no significant differences in moisture content, extraction yield,and antioxidant activity. Therefore, further research needs to be developed to compare both dehydration processes.Keywords: dehydration, freeze-drying, red ginger, oven drying
Determination Of The Effects Of pH and Adsorption Isotherm Of Pb(II) Metal Ions by Using Activated Carbon From Spent Coffee Grounds petrick effendi; irfan saputro; tutun nugraha
Liaison Journal of Engineering Vol. 2 No. 2 (2022): Vol 2, No 2, Desember 2022
Publisher : Liaison Journal of Engineering

Show Abstract | Download Original | Original Source | Check in Google Scholar

Abstract

Caffein, tannin, and polyphenol contents in a substance is an important parameter to determine the hazardous level of the substance. This makes the spent coffee ground considered as a hazardous waste. Lead, on the other hand, is considered as toxic heavy metal because of its ability to pollute water ecosystem. In this study, the spent coffee ground was activated by activated carbon then it was used to adsorb lead ion [Pb(II)]. The effect of pH and the adsorption type of the activated carbon used to adsorb lead ion were studied. Several steps such as brewing, drying, and carbonizing under a specific condition were used to obtain the samples of spent coffee ground. The samples were then activated chemically by using HCl and then washed by using deionized water, and dried. The result shows that the moisture content of the activated carbon from the spent coffee ground was 11.32 ± 0.03%, and its pores size formed was 8.50 ± 4.11 nm. The maximum amount of adsorption was occurred at pH 3 and it followed the Langmuir type of adsorption isotherm. The maximum adsorption capacity was 4.97 ± 0.16 mg/gr for each gram of adsorbent which was the activated carbon from the spent coffee ground.Keywords: Spent Coffee Ground; Activated Carbon; pH; SEM; Adsorption Isotherm
Comparison of ImageJ Software Results Between The Growth of Lemna minor in the Presence of Sodium Bicarbonate and Without Sodium Bicarbonate lukas kristian; runita rizkiyanti putri; tutun nugraha
Liaison Journal of Engineering Vol. 2 No. 2 (2022): Vol 2, No 2, Desember 2022
Publisher : Liaison Journal of Engineering

Show Abstract | Download Original | Original Source | Check in Google Scholar

Abstract

Water quality in the recent years had been a very important aspect in daily life, especially in big cities where they produced many liquid organic waste. One of a way to overcome this problem, a primary biological treatment could be used to transform this liquid organic waste water to become a cleaner water by using certain plant that belong to family of duckweeds, which was Lemna minor. Lemna minor plant had the benefit from growing on top of polluted water, in addition it helped to induce a better quality of the polluted by the reducing organic matters. The organic matters itself could be dangerous for daily usage, but for the Lemna minor it was useful for their growth due to their unique ability. The ability that was used by this Lemna minor was called as phytoremediation which defined as the ability to absorb some excess organic matters and transform it to become a nutrients for the plant growth. In this experiment, the phytoremediation effect would be observed by the growth of the plant inside a home scale bioreactors and the result was compared by using ImageJ Software analysis. The comparison are done between two aquariums that were filled with and without sodium bicarbonate. During the experiment days without the sodium bicarbonate, some ofthe Lemna minor could grow very well, but some of the Lemna minor also could not grow very well. During the experiment days with sodium bicarbonate was added, the plant growth was more consistent and grown very well due to the effect of the pH stability and alkalinity return properties. The percent coverage area when the Lemna minor grown very well, it reached up to 66 %.Keywords: Template; Lemna minor, ImageJ, Bioreactor, Waste water treatment, Sodium bicarbonate
INVESTIGATION OF PHYSICAL AND CHEMICAL PROPERTIES OF CITRONELLA OIL FOR DETERMINING THE CONCENTRATION OF CITRONELLAL COMPOUND andry tiawan; tutun nugraha; niken t. listyorini
Liaison Journal of Engineering Vol. 3 No. 1 (2023): Volume III
Publisher : Liaison Journal of Engineering

Show Abstract | Download Original | Original Source | Check in Google Scholar

Abstract

This journal explores the physical and chemical properties of citronella oils extracted from Cymbopogon species, known for their insect-repellent qualities, essential oils and cosmetic applications. The aim is to determine the relation between concentration of citronellal and its properties for further research. The study analyzes density, refractive index, color, solubility, and utilizes GC-MS analysis. Different citronella oil samples with varying citronellal compositions are examined. The results show variations in properties among samples with different concentrations. Density and refractive index had the potential for determining citronellal concentration. GC-MS analysis identifies and quantifies components, with a focus on citronellal. The refractive index is inversely proportional to the concentration. The relation between the value of refractive index and citronella concentration is (y = -0.0002x + 1.4773) with R2 = 0.9934. Refractive index analysis has the strongest potential to be used as field method of measurement due to its higher resolution nature and ease of it use by untrained persons. Keywords: Citronella, Citronellal, Geraniol, Physicochemical Properties, Density, Refractive Index
Preservation of fish using instant extract of green and black tea Tutun Nugraha; Anthony Fernando; Pudjo Rahardjo
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 | 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. 
Co-Authors andry tiawan Anthony Fernando irfan saputro lukas kristian muhammad zacky rizano niken t. listyorini petrick effendi Pudjo Rahardjo runita rizkiyanti putri Vanny Narita