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All Journal Journal of Vocational Studies on Applied Research Journal of Counseling and Educational Research
Wulansari, Tiara
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Humanities Economics, Econometrics & Finance Education Engineering Environmental Science Social Sciences

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Optimizing Microwave-Assisted Extraction Parameters for Delignification of Water Hyacinth Stems Mario, Abraham; Fahira, Lala Firdha; Wulansari, Tiara; Amalia, Rizka
Journal of Vocational Studies on Applied Research Volume 6, Issue 2, Year 2024 (October 2024)
Publisher : Vocational College of Universitas Diponegoro

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.14710/jvsar.v6i2.24429

Abstract

Water hyacinth (Eichornia crassipes) is an aquatic plant that grows very quickly in Indonesian waters and is classified as an invasive weed, so it can cause ecological problems. Water hyacinth stems have a high cellulose content of 28-39%. Extraction of cellulose from water hyacinth needs to be done to remove lignin content. The microwave delignification method has the advantage of a rapid increase in temperature so that the extract yield is greater. This study aims to determine the optimal operating conditions in the delignification process of water hyacinth stems using the Microwave Assisted Extraction (MAE) method by examining the process variables: extraction time (5,10,15 minutes) and microwave power (400, 5000 and 600 watts). Based on the results of the study, the optimal operating conditions at a transmission time of 11.5 minutes and a transmission power of 530.5 watts, which were obtained in 20.25% of water hyacinth stems.
The Effect of Loneliness on Nomophobia In Students at Yaspi Senior High School Hafni, Merri; Istiana, Istiana; Wulansari, Tiara
Journal of Counseling and Educational Research Vol. 1 No. 2 (2024): Journal of Counseling and Educational Research
Publisher : Asosiasi Asesmen Pendidikan (AAP)

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.63203/jcerch.v1i2.138

Abstract

The purpose of this study was to determine the description of Nomophobia in students who have feelings of loneliness, to determine the description of students who experience loneliness, and to measure how much loneliness affects Nomophobia in students at SMA Yaspi. Based on the Solvin formula with a 5% error rate, the researcher gave a questionnaire to 88 students with a population of 113 students. This study used the UCLA-LS Version 3 measurement scale for the balance variable and the NMP-Q measurement scale for the Nomophobia variable. The research method used was quantitative. The data analysis technique was carried out using Simple Linear Regression Analysis which was calculated with the help of the SPSS (Statistical Program for Social Science) 27 for windows program. The results of the study Loneliness has a positive and significant effect on Nomophobia in students at SMA Yaspi which can be interpreted that the higher the level of equality felt, the more Nomophobia behavior will increase. This is based on the results of the calculations produced that the tcount value> ttable (2.660> 1.663) so that Ha is accepted. And the calculated F value = 7.075 with a significance level of 0.009 <0.05, then the regression model can be used to predict the participation variable or in other words there is an influence of the Loneliness variable on the Nomophobia variable. The implications of the research results can be used as a guidance and counseling service program creation at SMA Yaspi.
Co-Authors Fahira, Lala Firdha Hafni, Merri Istiana Istiana Mario, Abraham Rizka Amalia