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Profil Kebutuhan terhadap Pengembangan Bahan Ajar Kromatografi Lapis Tipis dalam Pendidikan Asrori, Muhammad Roy; Widarti, Hayuni Retno; Rokhim, Deni Ainur
Chemistry in Education Vol 10 No 1 (2021): Terbit bulan April 2021
Publisher : Universitas Negeri Semarang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.15294/chemined.v10i1.46551

Bahan ajar merupakan salah satu kelengkapan penting dalam pembelajaran. Pada mata pelajaran kromatografi lapis tipis (KLT), bahan ajar yang ada diduga belum sesuai dengan tuntutan kurikulum terbaru dan kebutuhan atau masalah siswa/mahasiswa. Maka, tujuan penelitian ini adalah untuk mengetahui bahan ajar yang perlu dikembangkan pada topik KLT dan untuk mendeskripsikan perbedaan kebutuhan bahan ajar antara siswa Sekolah Menengah Kejuruan (SMK) dan mahasiswa Perguruan Tinggi (PT). Penelitian ini merupakan penelitian deskriptif kualitatif. Data dikumpulkan dari observasi tipe non partisipan, wawancara mendalam dan angket tertutup. Wawancara ditujukan kepada 2 Guru dan 2 Dosen. Angket tertutup diisi oleh 20 siswa kimia analisis SMKN 7 Malang dan 20 Mahasiswa Kimia UM. Teknik analisis secara deskriptif kualitatif melalui reduksi, penyajian, dan penarikan kesimpulan data. Hasil observasi adalah pustaka yang digunakan masih terbitan lama. Hasil wawancara menyatakan bahwa bahan ajar perlu update sesuai perkembangan ilmu. Hasil analisis angket adalah siswa dan mahasiswa memiliki kebutuhan sumber belajar yang berbeda. Siswa SMK membutuhkan sumber belajar yang bersifat teknis (60% video) dan mahasiswa membutuhkan sumber belajar yang bersifat deskriptif (70% animasi). Sumber belajar perlu integrasi teknologi (100% respon setuju). Kesimpulan, bahan ajar perlu dikembangkan yang berbasis multimedia interaktif, sehingga bahan ajar yang dikemas secara utuh disarankan untuk penelitian pengembangan.

Profil Kebutuhan terhadap Pengembangan Bahan Ajar Kromatografi Lapis Tipis dalam Pendidikan Asrori, Muhammad Roy; Widarti, Hayuni Retno; Rokhim, Deni Ainur
Chemistry in Education Vol 10 No 1 (2021): Terbit bulan April 2021
Publisher : Universitas Negeri Semarang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.15294/chemined.v10i1.46551

Bahan ajar merupakan salah satu kelengkapan penting dalam pembelajaran. Pada mata pelajaran kromatografi lapis tipis (KLT), bahan ajar yang ada diduga belum sesuai dengan tuntutan kurikulum terbaru dan kebutuhan atau masalah siswa/mahasiswa. Maka, tujuan penelitian ini adalah untuk mengetahui bahan ajar yang perlu dikembangkan pada topik KLT dan untuk mendeskripsikan perbedaan kebutuhan bahan ajar antara siswa Sekolah Menengah Kejuruan (SMK) dan mahasiswa Perguruan Tinggi (PT). Penelitian ini merupakan penelitian deskriptif kualitatif. Data dikumpulkan dari observasi tipe non partisipan, wawancara mendalam dan angket tertutup. Wawancara ditujukan kepada 2 Guru dan 2 Dosen. Angket tertutup diisi oleh 20 siswa kimia analisis SMKN 7 Malang dan 20 Mahasiswa Kimia UM. Teknik analisis secara deskriptif kualitatif melalui reduksi, penyajian, dan penarikan kesimpulan data. Hasil observasi adalah pustaka yang digunakan masih terbitan lama. Hasil wawancara menyatakan bahwa bahan ajar perlu update sesuai perkembangan ilmu. Hasil analisis angket adalah siswa dan mahasiswa memiliki kebutuhan sumber belajar yang berbeda. Siswa SMK membutuhkan sumber belajar yang bersifat teknis (60% video) dan mahasiswa membutuhkan sumber belajar yang bersifat deskriptif (70% animasi). Sumber belajar perlu integrasi teknologi (100% respon setuju). Kesimpulan, bahan ajar perlu dikembangkan yang berbasis multimedia interaktif, sehingga bahan ajar yang dikemas secara utuh disarankan untuk penelitian pengembangan.

The Perception of Islamic Youth to The Phenomenon of Hubbu Ilahi Muhammad Roy Asrori; Zakiyatul Fitriyah; Ahmad Faikul Anam; Ahmad Nashih Anis Zubaidy; Zubaidah Zubaidah
International Journal of Islamic Khazanah Vol 11, No 2 (2021): IJIK
Publisher : UIN Sunan Gunung Djati Bandung

Youth life is closely related to spiritual activity. The phenomenon that is still encountered is Hubbu Ilahi, or the love attitude of Allah SWT. This phenomenon is presumed that adolescents only state and do not know the consequences of their attitudes. So, this study aims to determine the perceptions of today's adolescents on the phenomenon of Hubbu Ilahi. This research is descriptive qualitative research with a survey research method. This study used a purposive random sampling technique to 39 adolescents. Data collection used a questionnaire with the google form platform. Then, the data were analyzed using: data presentation, data reduction, and concluding. The results showed that adolescent respondents stated the consistency of love of the Quran, love of Rasulullah (SAW), love of the Prophet's Sunnah, and love of the Akhirat life. However, the busyness of the world blocks the proven proof of love. The analysis concluded that only 7.7% of adolescents fit Hubbu Ilahi's criteria.

ANALISIS KANDUNGAN DARI PASIR PANTAI PEH PULO KABUPATEN BLITAR MENGGUNAKAN XRF DAN XRD Muhammad Roy Asrori; Yana Fajar Prakasa; Dinar Rachmadika Baharintasari; Sumari Sumari
Jurnal Fisika : Fisika Sains dan Aplikasinya Vol 4 No 2 (2019): Jurnal Fisika : Fisika Sains dan Aplikasinya
Publisher : Universitas Nusa Cendana

Telah dilakukan penelitian yang berjudul analisis kandungan mineral pasir pantai Peh Pulo Kabupaten Blitar menggunakan XRF dan XRD. Penelitian ini bertujuan untuk mengetahui bagaimana persentase kandungan mineral dalam pasir pantai Peh Pulo Kabupaten Blitar. Instrumen yang digunakan adalah XRF dan XRD dimana sampel ditempatkan dalam sample holder kemudian diradiasi dengan sinar X. Berdasarkan hasil analisis kandungan unsur dan mineral dalam pasir pantai peh Pulo maka dapat disimpulkan bahwa pasir pantai Peh Pulo memiliki potensi untuk dijadikan sebagai bahan dasar pembuatan material nanoteknologi. Berdasarkan hasil analisis XRF menunjukkan adanya kandungan CaO sebesar 94,46 % dan hasil analisis XRD menunjukkan adanya kandungan mineral jenis Aragonite

Analisis Kandungan Mineral Pasir Pantai Bajul Mati Kabupaten Malang Menggunakan XRF dan XRD Sumari Sumari; Yana Fajar Prakasa; Muhammad Roy Asrori; Dinar Rachmadika Baharintasari
Jurnal Kimia Fullerene Vol 5 No 2 (2020): Fullerene Journal of Chemistry
Publisher : Fakultas Matematika dan Ilmu Pengetahuan Alam

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.37033/fjc.v5i2.154

Mineral exploration in Indonesia has not been evenly distributed, so a study with title analysis of the sand mineral content of Bajul Mati Malang Regency was carried out using XRF and XRD. The aims of this study to determine the percentage of mineral that containing in the sand of Bajul Mati beach in Malang Regency. The instruments used XRF and XRD where the samples were placed in a sample holder and irradiated with X-rays then. The result of analysis of mineral content and metal oxide in Bajul Mati beach sand showed that the beach sand of Bajul Mati has the big potential to be used as a base for making nanomaterials. The results of analysis of XRF showed that the content of SiO2 was 46.7% and the results of analysis of XRD showed that the SiO2 mineral has the quartz phased. Bajul Mati beach sand has the potential to be a source of mineral material.

Pengembangan Virtual Laboratory Pada Praktikum Pemisahan Kimia Terintegrasi Telefon Pintar Deni Ainur Rokhim; Muhammad Roy Asrori; Hayuni Retno Widarti
JKTP: Jurnal Kajian Teknologi Pendidikan Vol 3, No 2 (2020)
Publisher : Universitas Negeri Malang

Abstrak: Inovasi metode pembelajaran di dalam laboratorium telah mengalami perkembangan sangat pesat. Salah satu inovasi tersebut melalui penggunaan kelas virtual laboratorium dalam kelas IPA, seperti halnya pada kelas pemisahan kimia. Tujuan dari penelitian ini adalah (1) menciptakan kreasi media pembelajaran Virtual Laboratory pada praktikum pemisahan kimia terintegrasi android untuk menunjang pembelajaran praktikum, (2) mendeskripsikan uji validitas dan keterbacaan mengenai kreasi media pembelajaran Virtual Laboratory pada praktikum pemisahan kimia terintegrasi telefon pintar. Metode pengembangan yang dipakai yaitu 4-D (four-D). Data yang didapat berupa data kualitatif dan kuantitatif. Data kualitatif berupa saran/masukan dari validator dan data kuantitatif berupa angket validasi dan keterbacaan. Hasil validasi menunjukkan bahwa validasi materi sebesar 95% (sangat layak), validasi media 88,5% (sangat layak). Selain itu, hasil uji coba diperoleh sebesar 83,5% (sangat layak). Secara praktis, media yang telah dikembangkan sangat bermanfaat untuk menunjang pembelajaran praktikum.Abstract: Innovation of learning methods in the laboratory has experienced very rapid development. One of these innovations is through the use of virtual laboratory classes in science classes, as well as in chemical separation classes. The purpose of this research is (1) to create a virtual laboratory learning media on chemical separation practicum integrated with the android to support practical learning, (2) to describe the validity and readability test on the creation of the Virtual Laboratory learning media on chemical separation practicum integrated with the android. The development method uses a 4-D (four-D) development model. The data obtained in the form of qualitative and quantitative data. Qualitative data in the form of input from the validator and quantitative data in the form of a validation and readability questionnaire. The validation results show that the material validation is 95% (very feasible), the media validation is 88.5% (very feasible). In addition, the trial results obtained by 83.5% (very feasible).

Sono-hydrolysis of banana stem midrib using HY-zeolite from natural sand-based silica as a catalyst Sumari Sumari; Aman Santoso; Muhammad Roy Asrori; Yana Fajar Prakasa; Dinar Rachmadika Baharintasari
International Journal of Advances in Applied Sciences Vol 11, No 4: December 2022
Publisher : Institute of Advanced Engineering and Science

Banana stem midrib has the potential as a glucose source through catalytic hydrolysis assisted by ultrasonic (sono-hydrolysis). Besides, natural sand-based silica is the potential as raw material for zeolite synthesis. The purpose of the study was to do two things: i) characterize HY-zeolite made from natural sand-based silica and ii) determine whether HY-zeolite is effective for sono-hydrolysis of banana stem midrib. There was a total of four processes that were carried out, including i) the extraction of silica, ii) the synthesis of HY zeolite, iii) the hydrolysis process, and iv) the glucose content test. The results of the study were gained two things: i) The findings of X-ray fluorescence (XRF), X-ray diffraction (XRD), scanning electron microscopy (SEM), and Fourier transform infrared (FTIR) on HY-zeolite are 2.3 Si/Al, obtained 2 theta and d-spacing data similarities for HY-zeolite, and formed T-O-T, O-T-O (T=Si/Al), and Si-OH groups respectively; and ii) HY-zeolite with ultrasonic was effective for hydrolyzing cellulose into glucose at maximum temperature and time, 55 °C and 6 hours.

Silica extract from Malang beach sand via leaching and sol-gel methods Sumari Sumari; Muhammad Roy Asrori; Yana Fajar Prakasa; Dinar Rachmadika Baharintasari; Aman Santoso
International Journal of Advances in Applied Sciences Vol 12, No 1: March 2023
Publisher : Institute of Advanced Engineering and Science

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.11591/ijaas.v12.i1.pp74-81

Many silica minerals are found in beach sands. One of its beach sands is in Bajul Mati beach sand which contains high silica. The silica can be extracted using existing methods, but it is less environmentally friendly. In this research, the extracting process of silica from the sand of Bajul Mati beach (South of Java-Indonesia) has been carried out through a method that is low-cost and more environmentally friendly. The purpose of this study was to characterize extracted silica with instrumentation results and economic analysis. The method of extracting silica from beach sand was via leaching and sol-gel methods: i) leaching with 7M HCl,ii) the formation of clear sodium silicate solution (Na2O.SiO2),iii) sol-gel: sodium silicate solution titrated with oxalic acid (H2C2O4) 1 M until pH 6 was obtained and silicite Si(OH)4 was formed, and iv) characterization with X-ray fluorescence (XRF), X-ray diffraction (XRD), Fourier transform infrared (FTIR), and scanning electron microscopy (SEM) with economic analysis. The result showed that extracted silica has a cristobalite structure based on XRD analysis. The purity of silica (% Wt Si) reached 93.9% based on XRF analysis. FTIR analysis has identified silanol, siloxic, and siloxane groups. The SEM analysis shows that silica (SiO2) particles tend to form agglomerations about ∼1 μm. In addition, economic analysis results showed that this method will support implementation in the future, so silica has been produced by this developed method.

Karakterisasi Metil Ester Dari Minyak Biji Bunga Matahari dan Minyak Zaitun di Bawah Katalis KOH Aman Santoso; Muhammad Roy Asrori; Sumari Sumari; Andyka Medarda Pradana
Journal of Engineering Science and Technology Vol. 1 No. 1 (2023): January
Publisher : Indonesian Journal Publisher

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.47134/jesty.v1i1.5

Fatty acid methyl esters can be obtained from the synthesis of vegetable oil with methanol using a base catalyst. Vegetable oil has potential as biodiesel feedstock, the methyl ester character of various vegetable oils is different, for example from sunflower seed oil and olive oil. The synthesis of methyl esters by conventional transesterification reactions generally takes 1-2 hours. The purpose of this study was to synthesize methyl esters from sunflower seed oil and olive oil with a KOH catalyst and to determine the yield and its characteristics. This research is a type of laboratory experimental research. The research was carried out in 3 stages which included (1) determination of the free fatty acid content (ALB) of the oil, (2) transesterification of the oil with methanol and potassium hydroxide as a catalyst, and (3) characterization of the synthesized methyl ester which included density, viscosity, and number. acid. The results showed that the yield of methyl esters synthesized by transesterification reaction of sunflower seed oil was 95.61% and the yield of methyl esters synthesized by transesterification reaction of olive oil was 95.09.%. The methyl ester characters synthesized from sunflower seed oil are, density of 0.906 g/mL, viscosity of 5.035 cSt, acid number of 1.21 g KOH/g. The methyl ester characters synthesized from olive oil by transesterification reaction are density of 0.909 g/mL, viscosity of 12.203 cSt, acid number of 0.629 g KOH/g.

Perbandingan Metode Maserasi dan Microwave-Assisted Extraction pada Daun Beluntas dengan Variasi Pelarut dan Uji Antioksidan: Comparison of Maceration and Microwave-Assisted Extraction on Beluntas Leaves with Variation of Solvent and Antioxidant Test Yudhi Utomo; Nur Chairini; Muhammad Roy Asrori
KOVALEN: Jurnal Riset Kimia Vol. 9 No. 1 (2023): April Edition
Publisher : Chemistry Department, Mathematics and Natural Science Faculty, Tadulako University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.22487/kovalen.2023.v9.i1.16155

Beluntas leaves (Pluchea indica L.) as Indonesian herbal plants contain secondary metabolites such as flavonoids. Beluntas leaf parts can be used as medicine. The content of secondary metabolites in Beluntas leaves acts as a natural antioxidant. Beluntas leaf extraction has not been optimal so far. Microwave assisted extraction can increase the yield. This research aims to study the effect of giving different types of solvents of extraction on Beluntas leaves on the levels of flavonoids and the resulting antioxidant activity, and determine the profile of Beluntas leaf extraction results based on comparative trials of the maceration method and MAE (microwave-assisted extraction). This research was conducted in 4 stages: (1) sample preparation of dried Beluntas leaves, (2) extraction by maceration with various types of solvents n-hexane, ethyl acetate, and 70% ethanol, (3) the characteristics of the flavonoid compounds, namely the qualitative test and the quantitative test with AlCl3, and (4) the measurement of antioxidant activity in Beluntas leaf extract using the DPPH method. The results of this study obtained a total flavonoid content of 4.23 mgQE/g which was the result of maceration of the ethyl acetate solvent extract (yield: 5.09%), and all Beluntas leaf extracts in ethyl acetate solvent were included in the category of very strong antioxidant activity with an IC50 value of 31.68 μg/mL.

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