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All Journal CALYPTRA : Jurnal Ilmiah Mahasiswa Universitas Surabaya Indonesian Journal of Forestry Research Fundamental Management Journal Empowerment : Jurnal Pengabdian Masyarakat Pharmacology and Clinical Pharmacy Research JIPD (Jurnal Inovasi Pendidikan Dasar) Jurnal Ekonomi Bisnis Indonesia Indonesian Journal of Global Health research Wood Research Journal : Journal of Indonesian Wood Research Society Wood Research Journal : Journal of Indonesian Wood Research Society ABDI MOESTOPO: Jurnal Pengabdian pada Masyarakat Devotion: Journal of Research and Community Service Jurnal Ekonomi dan Bisnis GROWTH (JEBG) Synergy and Society Service Jurnal Edukasi dan Pengabdian kepada Masyarakat (JEPKM) Jurnal Mahasiswa Entrepreneur Medika: Jurnal Ilmiah Kesehatan fundamental management journal Indonesian Journal of Forestry Research
Ika WAHYUNI
R & D Unit for Biomaterials, Cibinong Science Center - LIPI
Agriculture, Biological Sciences & Forestry Humanities Decision Sciences, Operations Research & Management Economics, Econometrics & Finance Education Electrical & Electronics Engineering Environmental Science Health Professions Immunology & microbiology Languange, Linguistic, Communication & Media Library & Information Science Medicine & Pharmacology Nursing Public Health Social Sciences Other

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The Effect of Ultrasonication and Delignification Treatment on the Sugar Released Value of Wood Wahyuni, Ika; Adi, Danang Sudarwoko; Risanto, Lucky; Fitria, Fitria; Dwianto, Wahyu; Hartati, Sri; Kaida, Rumi; Hayashi, Takahisa
Wood Research Journal Vol 5, No 2 (2014): Wood Research Journal
Publisher : Masyarakat Peneliti Kayu Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.51850/wrj.2014.5.2.37-45

Abstract

The objective of these research was to study the impact of ultrasonication and delignification pretreatments in several wood species on their easiness for enzymatic hydrolysis, having the potential to be developed as the feedstocks for bioethanol production. Four different wood species from three botanical gardens in Indonesia have been selected, i.e., Gymnostoma sumatranum, Firmiana malayana, Pterocarpus indicus, and Alstonia scholaris, due to their higher sugar released values than a fast-grown tree, Sengon (Paraserianthes falcataria), when all were directly enzymatically hydrolyzed without pretreatment. The sugar released values after ultrasonication and enzymatic hydrolysis were between 3 – 5.5 mg/100 mg wood meal. When delignification pretreatment was performed, the sugar released values were higher than those with ultrasonication, ranging between 4 – 10.2 mg/100 mg wood meal. All the sugar released values after pretreatment were higher than those without pretreatment. Gymnostoma sumatranum was selected as the most potential wood species in this study due to its consistency among the species producing highest sugar released across different treatments. The SEM results showed that there was no significant changes in the morphological structure of the untreated fiber before and after enzymatic saccharification since it still had a complex structure due to the high lignin content. However, after the delignification treatment, the surface morphology of the fiber showed a decrease in the number of pits of the fiber, the surface residual of pits were reduced, parallel lines were more clearly visible, and the fiber structure was damaged with more small holes presented. The surface morphology of the fiber from the wood powder having delignification pretreatment supports the sugar released values which shows that the these values were higher than other treatments due to more recalcitrant substances were degraded, making it was easier for enzymes to break down cellulose. After ultrasonication, the SEM result showed less disrupted cell wall compared to after delignification which confirmed the higher sugar released data with delignification.
The Effect of Ultrasonication and Delignification Treatment on the Sugar Released Value of Wood Wahyuni, Ika; Adi, Danang Sudarwoko; Risanto, Lucky; Fitria, Fitria; Dwianto, Wahyu; Hartati, Sri; Kaida, Rumi; Hayashi, Takahisa
Wood Research Journal Vol 5, No 2 (2014): Wood Research Journal
Publisher : Masyarakat Peneliti Kayu Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.51850/wrj.2014.5.2.37-45

Abstract

The objective of these research was to study the impact of ultrasonication and delignification pretreatments in several wood species on their easiness for enzymatic hydrolysis, having the potential to be developed as the feedstocks for bioethanol production. Four different wood species from three botanical gardens in Indonesia have been selected, i.e., Gymnostoma sumatranum, Firmiana malayana, Pterocarpus indicus, and Alstonia scholaris, due to their higher sugar released values than a fast-grown tree, Sengon (Paraserianthes falcataria), when all were directly enzymatically hydrolyzed without pretreatment. The sugar released values after ultrasonication and enzymatic hydrolysis were between 3 – 5.5 mg/100 mg wood meal. When delignification pretreatment was performed, the sugar released values were higher than those with ultrasonication, ranging between 4 – 10.2 mg/100 mg wood meal. All the sugar released values after pretreatment were higher than those without pretreatment. Gymnostoma sumatranum was selected as the most potential wood species in this study due to its consistency among the species producing highest sugar released across different treatments. The SEM results showed that there was no significant changes in the morphological structure of the untreated fiber before and after enzymatic saccharification since it still had a complex structure due to the high lignin content. However, after the delignification treatment, the surface morphology of the fiber showed a decrease in the number of pits of the fiber, the surface residual of pits were reduced, parallel lines were more clearly visible, and the fiber structure was damaged with more small holes presented. The surface morphology of the fiber from the wood powder having delignification pretreatment supports the sugar released values which shows that the these values were higher than other treatments due to more recalcitrant substances were degraded, making it was easier for enzymes to break down cellulose. After ultrasonication, the SEM result showed less disrupted cell wall compared to after delignification which confirmed the higher sugar released data with delignification.
PENGARUH KEPEMIMPINAN, KEDISIPLINAN DAN LINGKUNGAN KERJA TERHADAP KINERJA MELALUI KEPUASAN KERJA SEBAGAI VARIABEL INTERVENING PADA NON ASN DINAS PEMADAM KEBAKARAN KABUPATEN SITUBONDO Ambarwati, Dina Dwi; Wahyuni, Ika; Minullah, Minullah
Jurnal Mahasiswa Entrepreneurship (JME) Vol 3 No 10 (2024): OKTOBER 2024
Publisher : Fakultas Ekonomi dan Bisnis

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.36841/jme.v3i10.5289

Abstract

Situbondo district is one of the small districts located in the eastern part of the island of Java. One of them is the fire department located on Madura Street No. 17 Mimbaan West, Panji, Situbondo. The purpose of this research is to analyze the impact of leadership, discipline and work environment on performance through job satisfaction as a variable intervening on non-ASN fire department of Situbondo district. The total sample used in this study was 58 firefighters in Situbondo district besides the chief. Sampling technique using saturation sampling. Data analysis and hypothesis testing in this study using the Structural Equation - Partial Least Square (PLS-SEM) Model. The results of the direct influence hypothetical test using the Smart PLS 3.0 application, showed that Leadership has a significant positive impact on Employment Satisfaction, Discipline has an significant positive effect on Job Satisface, Working environments have a significant negative impact on Job satisfaction, Leadership significantly negatively impact on Performance, discipline significantly adversely influences Performance, work environment significantly positively impacts Performance, Work satisfaction significantly affects Performance, Leadment significantly influences performance through Job satisfaction.
PENGARUH KINERJA KEUANGAN MELALUI HARGA SAHAM TERHADAP NILAI PERUSAHAAN PADA PERUSAHAAN SUB SEKTOR INDUSTRI HOTEL, RESTORAN, DAN PARIWISATA YANG TERDAFTAR DI BEI TAHUN 2019-2020 Wahida, Zinta Nur; Wahyuni, Ika; Subaida, Ida
Jurnal Mahasiswa Entrepreneurship (JME) Vol 1 No 2 (2022): FEBRUARI 2022
Publisher : Fakultas Ekonomi dan Bisnis

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (291.724 KB) | DOI: 10.36841/jme.v1i2.1914

Abstract

The Covid-19 pandemic also has a negative impact on companies such as a decrease in stock prices and company financial performance which can affect company value. This study aims to determine the effect of financial performance on firm value through stock prices as an intervening variable. The population in this study are all sub-sector companies of the hotel, restaurant and tourism industry. The sample of this research used purposive sampling technique. Data analysis and hypothesis testing used the Structural Equation – Partial Least Square (PLS-SEM) model. The results of the direct influence hypothesis test using the Smart PLS 3.0 application, show that financial performance has a negative but significant effect on stock prices, financial performance has a significant positive effect on firm value, stock prices have a significant positive effect on firm value. The results of the indirect effect hypothesis test show that financial performance has a negative and insignificant effect on firm value through stock prices.
PENGARUH STRUKTUR KEPEMILIKAN TERHADAP NILAI PERUSAHAAN DENGAN KEBIJAKAN HUTANG SEBAGAI VARIABEL INTERVENING PADA PERUSAHAAN SEKTOR ANEKA INDUSTRI YANG TERDAFTAR DI BEI TAHUN 2018-2020 Apriliyanti, Yunita Indri; Wahyuni, Ika; Pramitasari, Triska Dewi
Jurnal Mahasiswa Entrepreneurship (JME) Vol 1 No 7 (2022): JULI 2022
Publisher : Fakultas Ekonomi dan Bisnis

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (893.805 KB) | DOI: 10.36841/jme.v1i7.2189

Abstract

Multi-Industrial Sector Company is one type of business that is growing rapidly in Indonesia. A multi-industrial sector company is one of the companies listed on the Indonesia Stock Exchange and is considered more productive and can provide wide-ranging effects so as to increase the added value of raw materials, increase workforce, produce various consumer needs, generate foreign exchange sources, and contribute to taxes and largest customs. The purpose of this study was to determine the effect of Ownership Structure on Firm Value with Debt Policy as an intervening variable in Multi-Industrial Sector companies listed on the Indonesia Stock Exchange in 2018-2020. The population of this study is all companies in the various industrial sectors listed on the Indonesia Stock Exchange for the 2018-2020 period as many as 51 companies. The sampling technique was determined by purposive sampling. Data analysis and hypothesis testing in this study used the Structural Equation-Partial Least Square (PLS-SEM) method. The results of the direct influence hypothesis test using the Smart PLS 3.0 application, show that ownership structure has a negative but not significant effect on debt policy, ownership structure has a negative but not significant effect on firm value, debt policy has a significant positive effect on firm value. The results of the indirect effect hypothesis test show that the ownership structure has a positive but not significant effect on firm value through debt policy.
INTELLECTUAL CAPITAL TERHADAP NILAI PERUSAHAAN DENGAN PROFITABILITAS SEBAGAI VARIABEL INTERVENING PADA PERUSAHAAN FARMASI YANG TERDAFTAR DI BURSA EFEK INDONESIA PERIODE 2016-2020 Damayanti, Alvina; Wahyuni, Ika; Subaida, Ida
Jurnal Mahasiswa Entrepreneurship (JME) Vol 1 No 9 (2022): SEPTEMBER 2022
Publisher : Fakultas Ekonomi dan Bisnis

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (689.042 KB) | DOI: 10.36841/jme.v1i9.2221

Abstract

This study aims to determine the effect of Intellectual Capital on firm value through profitability as an intervening variable. This research was conducted on pharmaceutical companies listed on the Indonesia Stock Exchange. This study used a sample of 6 pharmaceutical companies with a five-year period during 2016-2020 which were selected by purposive sampling technique. The collection technique was obtained through the IDX's official website: www.idx.co.id. Data analysis and hypothesis testing in this study used the Structural Equation-Partial Least Square (PLS-SEM) method. The results of the direct influence hypothesis test using the Smart PLS 3.0 application, show that Intellectual capital has a significant negative effect on Profitability, Intellectual capital has a significant positive effect on Firm Value, Profitability is negative but not significant to Firm Value, and Intellectual Capital has a positive but not significant effect on Firm Value through Profitability.
PENGARUH PERTUMBUHAN PENJUALAN DAN LEVERAGE TERHADAP NILAI PERUSAHAAN PADA PERUSAHAAN PERTAMBANGAN YANG TERDAFTAR DI BURSA EFEK INDONESIA DENGAN KINERJA KEUANGAN SEBAGAI VARIABEL INTERVENING Wahyuni, Wahyuni; Wahyuni, Ika; Subaida, Ida
Jurnal Mahasiswa Entrepreneurship (JME) Vol 2 No 6 (2023): JUNI 2023
Publisher : Fakultas Ekonomi dan Bisnis

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.36841/jme.v2i6.3541

Abstract

The Effect of Sales Growth and Leverage on Company Value in Mining Companies Listed on the Indonesian Stock Exchange with Financial Performance as an Intervening Variable. The purpose of this study is to determine the effect of sales growth and leverage on company value in mining companies listed on the Indonesian stock exchange with financial performance as an intervening variable. The population in this study was all mining companies, totaling 57 companies. The sampling technique in this study used purposive sampling so that 6 samples were obtained. The results of the direct and indirect hypothesis test using the Smart PLS 3.0 application, the direct effect hypothesis test shows that sales growth has a positive but not significant effect on financial performance, leverage has a significant negative effect on financial performance, sales growth has a significant positive effect on company value, leverage has a significant effect positive but not significant to company value, and financial performance has a significant positive effect on company value. The results of the indirect effect test show that sales growth has a positive but not significant effect on company value through financial performance, leverage has a significant negative effect on company value through financial performance.
ANALISIS FAKTOR-FAKTOR YANG MEMENGARUHI RETURN SAHAM PADA PERUSAHAAN TRANSPORTASI YANG TERDAFTAR DI BURSA EFEK INDONESIA DENGAN NILAI PERUSAHAAN SEBAGAI VARIABEL INTERVENING TAHUN 2020-2023 Balgis, Raissa Zerlina; Wahyuni, Ika; Widaninggar, Nanda
Jurnal Mahasiswa Entrepreneurship (JME) Vol 3 No 12 (2024): DESEMBER 2024
Publisher : Fakultas Ekonomi dan Bisnis

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.36841/jme.v3i12.5334

Abstract

Transportation companies play a crucial role in moving goods and people from the point of origin to their destination. This research examines the factors influencing stock returns in transportation companies listed on the Indonesia Stock Exchange, with firm value serving as an intervening variable. The study adopts a descriptive quantitative approach. The population consists of transportation companies listed on the Indonesia Stock Exchange between 2020 and 2023, with purposive sampling used to select the sample. Data analysis and hypothesis testing are carried out using Structural Equation Modeling (SEM). Using the Smart PLS 3.0 statistical application, the hypothesis test results indicate that Leverage has a positive impact on Firm Value, Profitability has a positive but not significant effect on Firm Value, and Market Value Added has a negative but not significant effect on Firm Value. Additionally, leverage has a negative and significant impact on stock returns, while profitability has a positive but not significant effect on stock returns, and added market value has a positive but not significant effect on stock returns. Firm Value itself has a positive but not significant effect on Stock Returns. Furthermore, Leverage has a significant positive but not significant effect on Stock Returns through Firm Value, Profitability has a positive but not significant effect on Stock Returns through Firm Value, and Market Value Added has a negative but not significant effect on Stock Returns through Firm Value.
PENGARUH ETOS KERJA, DISIPLIN KERJA DAN KEPEMIMPINAN TERHADAP KINERJA KARYAWAN MELALUI KEPUASAN KERJA SEBAGAI VARIABEL INTERVENING PADA DINAS KETENAGAKERJAAN DI KABUPATEN SITUBONDO Aryudha, Fernandi; Wahyuni, Ika; Tulhusnah, Lusiana
Jurnal Mahasiswa Entrepreneurship (JME) Vol 3 No 4 (2024): APRIL 2024
Publisher : Fakultas Ekonomi dan Bisnis

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.36841/jme.v3i4.4919

Abstract

The purpose of this research is to analyze and test the influence of work ethic, work discipline and leadership on employee performance through job satisfaction. The sampling technique is determined by Non-Probability Sampling using Total Sampling or saturated samples. Data analysis and hypothesis testing in this research used the Structural Equation Model - Patial Least Square (PLS-SEM). The results of the direct influence hypothesis test using the Smart PLS 3.0 application, show that work ethic and work discipline have a significant effect on job satisfaction, leadership has a positive but not significant effect on job satisfaction, work ethic has a negative but not significant effect on performance, work discipline has a positive but not significant effect. significant effect on employee performance, leadership has a significant effect on employee performance, job satisfaction has a significant effect on employee performance. The results of indirect hypothesis testing show that the work ethic variable on employee performance through job satisfaction has a positive but not significant effect, work discipline on employee performance through job satisfaction has a positive but not significant effect and leadership on employee performance through job satisfaction has a positive but not significant effect.
LEVERAGE DAN UKURAN PERUSAHAAN TERHADAP NILAI PERUSAHAAN PADA PERUSAHAAN PERTAMBANGAN YANG TERDAFTAR DI BURSA EFEK INDONESIA DENGAN PROFITABILITAS SEBAGAI VARIABEL INTERVENING Fajri, Saiful; Wahyuni, Ika; Subaida, Ida
Jurnal Mahasiswa Entrepreneurship (JME) Vol 2 No 4 (2023): APRIL 2023
Publisher : Fakultas Ekonomi dan Bisnis

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.36841/jme.v2i4.3440

Abstract

Company value in mining companies listed on the Indonesia Stock Exchange with Profitability as an Intervening variable. Companies with good performance will continue to experience growth well in the future. Company size is considered capable of affecting company value. The company's goal is to increase prosperity and profits for shareholders in the company. This study aimed to determine the significance of the effect of Leverage and company size on company value through Profitability. This research uses descriptive and quantitative research. The population in this study are 47 mining sector companies listed on the Indonesia Stock Exchange period 2019-2021. The sampling technique in this study used Purposive Sampling technique. Data analysis and hypothesis testing in this study. This study uses the Structural Equation Model - Partial Least Square (PLS-SEM). The results of the direct effect hypothesis test using the Smart PLS 3.0 application show that Leverage has a negative but insignificant effect on Profitability, Company size has a negative but insignificant effect on Profitability, Leverage has a negative but insignificant effect on Company value, Company size has a significant positive effect on company value, Profitability has a positive but insignificant effect on company value. The indirect effect hypothesis test results show that the variable Leverage on Company value through Profitability has a negative but insignificant effect, and company size on Company value through Profitability has a negative but insignificant effect.
Co-Authors Afandi, Arif Afia Rohmatul, Vivi Afia Rohmatul Afifuddin, Muhammad Agus Wahyudi Salasa Gama Agustiarini, Suzhmita Agustin, Diah Rosalinda Agustin, Dinda Nurfiqi Ahmad Zaini Akmaris, Corintania Byand Al Fadly, Muh Wahyu Amalia, Risky Sofiatul Ambarwati, Dina Dwi Amelia, Sofiyatul Amrulloh, Lalu Sanik Wahyu Fadil Ananda, Rizka Ayu Anshory, Muhammad Iqbal Apriliyanti, Yunita Indri Ardhya Yudistira Adi Nanggala Ariani, Marieta Arifah, Ila Nur Arifah, Khoiratin Ariyantiningsih, Febri Artawan, I Putu Gede Bayu Aryudha, Fernandi Atiyah, Khoriratul Aulia, Rieza Nuril Aulifa, Diah L. AYU LESTARI Azizah, Faradila Alya Nur Azizah, Mega Nur Balgis, Raissa Zerlina Corina, Vania Rika Damayanti, Alvina Danang S. Adi Danang Sudarwoko Adi Desy Ratnasari Dewi, Nawa Kartika Dewi, R. Rosiyana Dewi, Rana Hariantika Dian Widiarti Diefayoni, Kevin Septyan Dina Pratiwi Dwi Santi Dwi Perwitasari Wiryaningtyas, Dwi Perwitasari Dwi Santi, Dina Pratiwi Dwipa, Bram Mahara Dwitama, Andika Ediyanto Erliana, Elfira Euis HERMIATI Fadiana, Mu'jizatin Fajar, Dani Syahrul Fajri, Saiful Fandiyanto, Randika Fatah, Ahmad Zainul Fatimah, Ratna Dwi Febiawanticha, Resma Ferdiansyah, Yusfan Filrisqi, Nurul Mareta Fitria Fitria Fitria, Anjar Ghina, Kaisul Hamida, Lutfiyatil Hanifa, Hilmiyatul Haryanti, Indri Sri Hasnawati Hasnawati Hendra Syahputra Herawati, Ita Hidayat, Ricky Hikmah, Ayu Nur Imania, Shofiatul Insani, Auliasha Firlana Hadi Istifani, Shofiatul Hasana Nur Jafar, Eka Sufartianinsih Jamilah, Alfi Wahidatul Jutti Levita Kharimah, Nurul Ikhsan Kharimah, Nurul Ikhsan Khofifah, Ana Khomariyah, Siti Nur KHOTIMAH, KHOSNUL Labiba, Fikriatul Laili, Siti Wiladatul Lestari, Indah Nita Lita Permata Sari Lucky Risanto Lusiana Tulhusnah Maghfiroh, Shofiyatul Mahila, Laely Septy Izza Maulidayanti, Elsa Bela Meilinda, Silvi Minullah, Minullah Muchamad Subali Noto Murtiani, Farida Muzaqi, Ahmad Nanda Widaninggar, Nanda Neneng Aminah Ningrum, Fitria Puspa Noor Hidayah Nurfadilah Nurfadilah Nurhasanah Nurhasanah Nurobikhainih, Mariasri Pramita, Risky Yunas Restu Pratiwi, Anita Yoan Putra, Gilang Pratama Qomariyah, Umam Durrotul Rachman, Riza Rahman, Alrival Zainur Rahman, Ervina Adita Rahmania, Wasilatul Ratih Damayanti Rini Kartika Sari Riski, Alfina Riskiya, Siti Romlani, Ucik Rosadi, Gufron Rosdianto, Aziiz M. Rosiva, Maulindatur Rumi Kaida rusnoto rusnoto Sakdiyah, Wardatus Salimah, Kiswatus Salsabila, Nindya Sari D, Siti Naga Uleng Purnama Sari, Putri Ayu Purnama Sari, Revina Andika Saudi, Rizky Rahmawati Setiana, Beta Soeliha, Siti Sri Hartati Sri Rulliaty Sri Rullyati Sukma S. Kusumah Sulistiyowati, Novi Susanto, Fidy Deli Syah, Aditiya Risqiyanto Takahisa Hayashi Takashi Watanabe Triska Dewi Pramitasari Vinola Herawaty Violiandani, Erine W, Dwi Perwitasari Wahida, Zinta Nur Wahyu DWIANTO wahyuni wahyuni Widayanti, Dwi Widiantari, Aninda Dinar Windiyani, Windiyani Wisnu, M. Ari Witriyana, Yuvita Budi Yasin, Ali Yatim, Yatim Yudha Praja, Yudha Yuliana Putri Yuliana, Feby Eka Nur Yusup AMIN Zainullah, Muhammad Zehro, Fatimatuz