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All Journal The Journal of Experimental Life Sciences (JELS) JURNAL TAHURI Journal Media Public Relations Jurnal Serambi Biologi Jurnal Rekayasa Proses JURNAL REKAYASA KIMIA & LINGKUNGAN Journal of Islamic Early Childhood Education
Putri, Rika
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Religion Agriculture, Biological Sciences & Forestry Humanities Biochemistry, Genetics & Molecular Biology Chemical Engineering, Chemistry & Bioengineering Education Energy Engineering Immunology & microbiology Languange, Linguistic, Communication & Media Medicine & Pharmacology Neuroscience Social Sciences Other

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Pengaruh Pupuk Organik Cair (POC) Teknologi Nano Dari Limbah Perut Ikan Tuna Mata Besar (Thunnus obesus) Terhadap Pertumbuhan Tanaman Cabai Merah (Capsicum annum L.) Putri, Rika; Razak, Abdul
Jurnal Serambi Biologi Vol. 9 No. 2 (2024): Jurnal Serambi Biologi
Publisher : Department of Biology, Faculty of Mathematics and Natural Sciences, Universitas Negeri Padang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24036/srmb.v9i2.353

Abstract

Cabai merah adalah salah satu komoditas holtikultura yang sangat penting. Cabai merah memiliki kandungan gizi dan berbagai vitamin. Buah cabai merah menghasilkan rasa pedas karena adanya kandungan Capsaicin pada cabai. Kebutuhan akan cabai merah meningkat karena bertambahnya jumlah penduduk. Pada saat sekarang ini, unsur hara yang dipakai oleh petani dipenuhi dengan penggunaan pupuk anorganik yang dapat menyebabkan kerusakan pada tanah sehingga kulitas tanah makin menurun. Dalam mengurangi pemakaian pupuk anorganik, digunakan bahan organik dalam pembuatan pupuk baik dalam bentuk padat maupun cair. Metode yang digunakan dalam penelitian adalah rancangan acak lengkap (RAL) dengan 5 perlakuan dan 5 pengulangan yang terdiri dari: P0 (100 ml air/ tanpa POC), P1 (25 ml POC + 75 ml air), P2 ( 50 ml POC + 50 ml air), P3 (73 ml POC + 25 ml air), P4 (100 ml POC). Data yang diperoleh dianalisis dengan sidik ragam ANOVA dengan menggunakan aplikasi SPSS 23. Jika terdapat perbedaan nyata maka dilanjutkan dengan uji Duncan New Multiple Range Test (DNMRT) pada taraf 5%. Hasil penelitian menunjukkan bhwa pemberian pupuk organik cair teknologi nano dari limbah ikan Tuna Mata Besar berpengaruh terhadap semua parameter pengamatan. Konsentrasi optimal dari semua parameter pengamatan adalah 100 ml POC/polibag.
Optimization of sustainable biodiesel production from waste cooking oil using heterogeneous alkali catalyst Andrifar, M.; Goembira, Fadjar; Ulfah, Maria; Putri, Rika; Yuliarningsih, Rati; Aziz, Rizki
Jurnal Rekayasa Proses Vol 16 No 2 (2022): Volume 16, Number 2, 2022
Publisher : Jurnal Rekayasa Proses

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.22146/jrekpros.74373

Abstract

The increasing world population, rapid industrialization, urbanization, and economic growth have led to a continuous increase in the consumption of fossil fuels to meet the ever-increasing demand for energy. Continuous emissions from burning fossil fuels will create a need to find appropriate and sustainable substitutes for fossil fuels. Biodiesel is the right alternative solution for diesel engines because it is renewable, non-toxic, and environmentally friendly. Waste cooking oil (WCO) from the food, non-food, restaurant, and household sectors is produced on a large scale in every country and can contribute to environmental pollution if proper disposal systems are not applied. Instead of throwing it landfills Environmental pollution can be minimized by recycling WCO. This study evaluates the potential of using WCO to produce biodiesel using zeolite synthesized from fly ash as a heterogeneous alkali catalyst through a transesterification reaction. The reactor in this study used a 1,000 ml three-necked boiling flask equipped with a condenser, cooling tank, and pump. Stirring and heating during the process of biodiesel production using a magnetic stirrer and a hot plate. The thermometer is used to measure the reaction temperature. Optimization of biodiesel production from zeolite catalyst synthesized from fly ash based on variations in the ratio of methanol: oil (8:1; 10:1; 12:1; and 14:1), catalyst weight (1, 2, 3, and 4% weight), and temperature (45 oC, 55 oC, and 65oC). Zeolite from fly ash produces biodiesel with a yield of 91.67% with optimum operating conditions reaction time of 60 minutes, methanol oil ratio of 8:1, operating temperature 55oC, and the amount of catalyst 1% by weight. This experiment confirms the possibility of utilizing fly ash waste for the application of catalysts in biodiesel production.
Synthesis of Zeolite from Fly Ash and Bottom Ash and Application for Biodiesel Transesterification Putri, Rika; Goembira, Fadjar; Ulfah, Maria; Andrifar, Muhammad; Yuliarningsih, Rati; Aziz, Rizki
Jurnal Rekayasa Kimia & Lingkungan Vol 19, No 1 (2024): Jurnal Rekayasa Kimia & Lingkungan (June 2024 )
Publisher : Chemical Engineering Department, Syiah Kuala University, Banda Aceh, Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.23955/rkl.v19i1.33921

Abstract

Burning coal in a Coal-Fired Power Plant produces by-products like fly ash and bottom ash. Zeolite synthesized from the ash in Teluk Sirih Coal-Fired Power Plant was applied as a catalyst in the biodiesel transesterification reaction. Zeolite synthesis used the hydrothermal method with acid pretreatment. The operating conditions for fly ash zeolite are a 2.4-molar ratio SiO2/Al2O3 and a crystallization time of 6 hours. The bottom ash zeolite used a 2.0-molar ratio SiO2/Al2O3 and a crystallization time of 8 hours. The performance test of the synthesized catalyst was carried out in the transesterification reaction using waste cooking oil as a raw material with a free fatty acid content of 0.7%. The synthesized catalyst was characterized using x-ray diffraction, scanning electron microscope, and Bruneuer-emmet-teller. The biodiesel with the highest yield was analyzed based on SNI 7182: 2015. The synthesis results of the catalyst produced type A zeolite, shown by the typical X-ray diffraction pattern and supported by the morphological test results using a cube-shaped. The surface area of zeolite fly ash and bottom ash is 12.87 m2/g and 5.13 m2/g. The test showed fly ash zeolite had the highest biodiesel yield of 89.66%. Based on the characterization using SNI 7182: 2015, the color and free glycerol met the standards, while density 40 C, kinematic viscosity 40 C, acid number, total glycerol, methyl ester content, and water content did not meet the standards.
Language, Identity, and Education: Exploring Students’ Linguistic Repertoires in Multilingual Indonesian Communities Maharani, Intan; Rizal, Ahmad; Putri, Rika; Ramadhan, Yusuf
Jurnal Tahuri Vol 20 No 2 (2023): August 2023
Publisher : Jurusan Pendidikan Bahasa dan Seni FKIP Universitas Pattimura

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30598/tahurivol20issue2page99-117

Abstract

Indonesia’s multilingual landscape offers a dynamic site for exploring how language, identity, and education intersect in everyday life. This study examines how students in multilingual Pontianak, West Kalimantan, construct and negotiate their linguistic repertoires across school, home, and religious domains, and how these repertoires reflect broader ideologies of language and belonging. Employing a qualitative ethnographic approach within a multi-site case study design, the research was conducted in four secondary schools representing public, Islamic, and Catholic institutions. Data were collected through participant observation, semi-structured interviews, language portrait and mapping activities, and classroom discourse analysis involving students, teachers, and administrators. Findings reveal that students possess fluid and hybrid linguistic repertoires shaped by their sociocultural environments. While local Melayu dialects dominate informal communication, Bahasa Indonesia and English function as symbols of academic legitimacy and modernity, and Arabic indexes religious identity. Institutional language policies, however, often reinforce hierarchical ideologies that marginalize local languages. The study introduces the Multilayered Linguistic Repertoire Model (MLRM), which conceptualizes multilingualism as dynamic identity practice rather than discrete linguistic systems. The model advances theoretical and pedagogical contributions to language policy, literacy education, and sociolinguistic research in postcolonial contexts, underscoring the need for inclusive and culturally grounded approaches to multilingual education in Indonesia.
PERAN MEDIA SOSIAL WHATSAPP DALAM PEMBELAJARAN MATEMATIKA PADA PERILAKU SISWA KELAS V D SDN NEGERI 1 KALIBALAU KENCANA BANDAR LAMPUNG Suhardi; Putri, Rika
Journal Media Public Relations Vol. 3 No. 2 (2023): Journal Media Public Relations (JMP)
Publisher : Program Studi Ilmu Komunikasi Universitas Tulang Bawang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.37090/jmp.v3i2.1336

Abstract

Media sosial whatsApp adalah alat komunikasi online yang digunakan sebagai alat bantu penyampai pesan (pelajaran) pada pembelajaran daring (Matematika) dimasa Pandemi covid-19 SD Negeri 1 Kalibalau Kencana Bandar Lampung. Dalam pembelajaran daring melalui WhatsApp memudahkan siswa dan guru untuk melakukan kegiatan belajar mengajar namun juga memiliki keterbatasan akan interaksi dan pengawasan dalam pembelajaran, sehingga guru tidak dapat mengetahui sejauh mana pemahaman materi siswa. Penelitian ini bertujuan untuk: Menganalisis apakah ada "peran pemberian materi (foto/video)", "peran bahasa", dan "peran penguasaan materi guru" dalam media sosial whatsApp pada pembelajaran matematika dengan perilaku siswa (pengetahuan, sikap, tindakan) kelas VD SD Negeri 1 Kalibalau Kencana Bandar Lampung. Dengan  jenis penelitian kualitatif, dan subjek penelitian berjumlah tujuh belas orang, terdiri dari dua key informan dan lima belas informan, menggunakan metode observasi, wawancara dan dokumentasi untuk pengumpulan data serta pendekan teori New Media/media baru (Pierre Levy). Hasil penelitian ini menunjukan bahwa: Ada "peran pemberian materi (foto/video)", "peran bahasa", dan "peran penguasaan materi guru"  dalam media sosial whatsApp pada pembelajaran matematika dengan perilaku siswa (pengetahuan, sikap, tindakan) kelas V D SD Negeri 1 Kalibalau Kencana Bandar Lampung. Pembelajaran matematika melalui media sosial WhatsApp dapat membantu siswa memiliki keterampilan berhitung dan mengetahui dan memahami dasar-dasar pelajaran matematika.
The Role of Educators in Implementing Disciplined Character in Children Efendi, Efendi; Misdawati, Misdawati; Eka Putri, Yuliana; Putri, Rika
Journal of Islamic Early Childhood Education Vol. 2 No. 2 (2024): December
Publisher : Institute of Research and Community Service STAI Yayasan Tarbiyah Islamiyah Kota Padang

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

Abstract

Education and application of discipline character in children should be started as early as possible. Through discipline character, children are taught to behave according to established standards. In this study, the role of teachers in applying discipline character in Sholeh toddler playgroup is examined. There are specific problems in the role of educators in applying discipline character in children. This study aims to determine the extent of the role of educators in applying discipline character in Sholeh toddler playgroup in Agam Regency. This type of research uses qualitative research methods with a qualitative descriptive approach. The data in this study were taken directly to the field, namely the research location at KB Balita Sholeh in Salareh Aia Barat village, Palembayan sub-district, Agam Regency. The data sources used in this study are primary and secondary data. Data collection techniques used are observation, interviews, and documentation. The technique of guaranteeing data validity uses source triangulation. Meanwhile, the data analysis technique in this study uses data reduction, data presentation, and drawing conclusions or verification. The results of this study are concluded that the role of educators in applying discipline character in Sholeh toddler playgroup has shown development with good results. This is proven by the actions or attitudes shown by the children, including the children have started to maintain the neatness and cleanliness of the classroom, line up neatly and orderly and many of them have obeyed the rules at school
Immunostimulant Activity of Neem Leaf (A. indica A. Juss) Ethanol Fraction on Tilapia (Oreochromis niloticus) Putri, Rika; Andayani, Sri; Yuniarti, Ating
The Journal of Experimental Life Science Vol. 8 No. 3 (2018)
Publisher : Graduate School, Universitas Brawijaya

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (1110.631 KB) | DOI: 10.21776/ub.jels.2018.008.03.08

Abstract

Intensive cultivation of Tilapia with high stock density and continuous artificial feeding will decrease the water quality and increase the growth of pathogenic bacteria. That situation led to the fish stressed so that the fish become the target of bacterial pathogen attacks. Alternatively, the environmental friendly treatment using herbal immunostimulant to solve that problem is required. The herbal in this study used neem leaf (Azadirachta indica A. Juss). The aim of this study was to evaluate ethanol fraction of neem leaf on immunostimulant activity of Oreochromis niloticus. In this study, the extraction method used maceration. Fractionation methods were using Thin Layer Chromatography (TLC) and Column Chromatography (CC). The biological component was analyzed using Phytochemical, FTIR and GC-MS methods. TLC test showed that ethyl acetate: n-hexane (1:1, v/v) result in brightest luminescence colors on the plates of silica gel under UV light (365 nm). The chromatography column from the ethanol extract of neem leaf (A. indica A. Juss) showed that separation of the fraction was done based on the formation of color, which obtained 5 (five) types of fractions. The results of the phytochemical test for the fraction 4 of neem leaf contains two compounds, i.e. flavonoids (+) and triterpenoids (++). The FTIR test showed that fraction 4 of neem leaves contain a class of terpenoid and flavonoid compounds. GCMS test results on fraction 4 of the neem leaves (A. indica A. Juss) obtained the high peak, which has 4 terpenoid compounds, 1 compound of flavonoid, and 1 type of lauric acid. The total leukocyte of the fish test increased after treated with fraction 4 of neem leaf (A. indica A. Juss) compared with control on day 7 after injection, i.e. 25.29 x 104 cells.mL-1.Keywords: fraction, leukocyte, Neem Leaves, Tilapia, Phytochemicals.
Co-Authors Abdul Razak ahmad rizal Andrifar, M. Andrifar, Muhammad Asa, Ferdian Ondira Ating Yuniarti Efendi Efendi Eka Putri, Yuliana Fadjar Goembira Maharani, Intan Maria Ulfah Misdawati, Misdawati Muhammad Luthfi Rizki Aziz Sri Andayani Suhardi Yuliarningsih, Rati