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All Journal Abdi Masyarakat JPIn : Jurnal Pendidik Indonesia Jurnal Pengabdian UNDIKMA Hydrogen: Jurnal Kependidikan Kimia Empiricism Journal Bakti Sekawan : Jurnal Pengabdian Masyarakat

Dahlia Rosma Indah

Universitas Pendidikan Mandalika

Author-ID : 3664566

Religion Agriculture, Biological Sciences & Forestry Humanities Chemistry Civil Engineering, Building, Construction & Architecture Computer Science & IT Decision Sciences, Operations Research & Management Economics, Econometrics & Finance Education Energy Environmental Science Health Professions Languange, Linguistic, Communication & Media Law, Crime, Criminology & Criminal Justice Library & Information Science Mathematics Nursing Public Health Social Sciences Other

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Articles

Efektivitas Ampas Tahu Sebagai Adsorben Logam Tembaga Pada Air Limbah Industri Dahlia Rosma Indah; Husnul Hatimah; Hulyadi Hulyadi
Hydrogen: Jurnal Kependidikan Kimia Vol 9, No 2 (2021): Hydrogen: Jurnal Kependidikan Kimia
Publisher : Universitas Pendidikan Mandalika Mataram

Copper is one of the toxic metals for health and the environment. In humans, high doses of copper metal can cause vomiting, dizziness, weakness, kidney and liver symptoms, anemia, to coma, and in severe cases, the patient can die. Judging from the dangers, proper waste management is needed to reduce the side effects of these pollutants. A practical and inexpensive technology is an adsorption adsorption technique using an efficient and easily available natural adsorbent, namely tofu dregs. The protein contained in tofu is one of the reasons for using tofu waste as an adsorbent. The absorption of amino acids that form two-charged ions (zwitter ions) is owned by proteins. Toxic metal can be bound to protein as metallotionein. The study consisted of four stages, namely (1) Analysis of initial copper content in silver craft waste; (2) Preparation of tofu waste adsorbent; (3) Characterization of tofu dregs adsorbent; and (4) variation of adsorption contact time. The study used a laboratory-scale experimental method. The adsorbent was contacted with the sample using a magnetic stirrer at various times. Instrument Atomic Absorption Spectrometer was used for the analysis of copper metal content and identification of its functional groups using an infrared spectrometer with the result that tofu waste has functional groups -OH, NH (stretching), CH (aliphatic), C=O, -OH (bending vibrations). , and CO. Copper metal content obtained is 19.5979 ppm. The optimum adsorption time was reached at 120 minutes with an optimum adsorption efficiency of 54.88%.

Pelatihan Pembuatan Produk Kimia Rumah Tangga di MA Darul Habibi NW Paok Tawah Praya Ratna Azizah Mashami; Dahlia Rosma Indah; Husnul Hatimah; Citra Ayu Deewi; Pahriah Pahriah
Jurnal Pengabdian UNDIKMA Vol 1, No 1 (2020): May
Publisher : Universitas Pendidikan Mandalika (UNDIKMA)

The purpose of this community service to provide an understanding that chemistry is fun, provide skills in making chemical products that are commonly used in everyday life, and increase student motivation in learning chemistry at MA Darul Habibi NW Paok Tawah Praya. The method used was demonstration, practice, and discussion, with training and mentoring approaches. Student responses to training were obtained from a questionnaire. The results of the questionnaire analysis showed 100% of students stated the material presented was easy to understand and the method used was fun, 90% of students stated that before training the chemistry lessons were not fun, 100% of students stated that chemistry lessons were fun after attending training, 83.3% of students were motivated to learning chemistry after attending training, 80% of students saw business opportunities and 73.3% of students wanted to try entrepreneurship through household chemical products. The training succeeded in changing students' views in a positive direction significantly.

Pengaruh penambahan media limbah jamur merang dalam pupuk organik cair terhadap konsentrasi kaslium Yuli Anggraini Putri; Hulyadi Hulyadi; Dahlia Rosma Indah
Empiricism Journal Vol. 1 No. 1: June 2020
Publisher : Lembaga Penelitian dan Pemberdayaan Masyarakat (LITPAM)

Pupuk organic cair merupakan pupuk yang berupa larutan dari hasil pembusukan bahan-bahan organik. Kombinasi whey tahu dan limbah jamur merang dengan penambahan starter mikroorganisme lokal (MOL) dapat diolah menjadi pupuk organik cair mengandung makro nutrient Kalium (K-total). Tujuan penelitian ini untuk mengetahui kandungan kalium optimum pada pupuk organik cair whey tahu dengan penambahan limbah jamur merang dan mikroorganisme lokal (MOL). Metode penelitian ini menggunakan penelitian eksperimen di laboratorium dengan menggunakan metode Rancangan Acak Lengkap (RAL) dengan dua: faktor 1 massa limbah jamur merang (Limbah jamur merang lama 600 gr dan limbah jamur merang baru 600 gr) dan faktor 2 volume pupuk organik cair (masing-masing 1L). Hasil penelitian menunjukkan bahwa kandungan K-total tinggi terdapat pada perlakuan POC + LB yaitu 1,05%.The effect of the addition of mushroom waste media in liquid organic fertilizer to the concentration of cassavaÂ AbstractLiquid organic fertilizer is a fertilizer in the form of a solution from the decay of organic matter. The combination of whey tofu and mushroom waste with the addition of local microorganism starter (MOL) can be processed into liquid organic fertilizer containing macro-nutrient potassium (K-total). The purpose of this study was to determine the optimum potassium content in the liquid organic fertilizer of whey tofu with the addition of mushroom waste and local microorganisms (MOL). This research method used experimental research in the laboratory using the Completely Randomized Design (CRD) method with two: a factor of 1 mass of mushroom waste (600 gr old mushroom waste and 600 gr new mushroom waste) and a factor of 2 volume of liquid organic fertilizer (each -Each 1L). The results showed that the high total K content found in the POC + LB treatment was 1.05%.

Pelatihan Pengolahan Nilai Dan Analisis Butir Soal Dan Hasil Belajar Berbasis Ms. Office Excel di SMP Islam Al-Azhar NW Kayangan Dahlia Rosma Indah; Hendrawani Hendrawani; Yusran Khery; Suryati Suryati; Husnul Hatimah
Abdi Masyarakat Vol 1, No 1 (2019)
Publisher : Lembaga Penelitian dan Pendidikan (LPP) Mandala

Melakukan pengelolaan nilai, analisis butir soal dan hasil belajar siswa merupakan kewajiban setiap guru. Dengan begitu, guru akan dapat melakukan diagnosa masalah dalam pembelajaran, menyimpulkan tingkat ketercapaian tujuan pembelajaran, dan memutuskan program tindak lanjut. Permasalahan yang ada di SMP Islam Al-Azhar NW Kayangan adalah, hanya sebagian kecil guru yang melakukan analisis butir soal dan hasil belajar siswa yang dibuktikan dengan dokumen analisis hasil belajar yang ada. Hal tersebut disebabkan oleh sebagian besar guru menganggap anlisis butir soal dan hasil belajar sebagai kegiatan yang rumit dan memeerlukan waktu yang sangat banyak. Hampir semua guru tidak menguasai program yang dapat digunakan untuk mengolah data angka. Masalah ini dapat diatasi jika guru memiliki kemampuan mengoperasikan program Ms. Office Excel sehingga proses pengolahan nilai, anlaisis butir soal dan hasil belajar dapat dilakukan dengan lebih efisien. Kegiatan telah terselenggara dengan baik. Respon peserta kegiatan sangat baik dengan skor rata-rata penilaian total yakni 82.5

Efisiensi Adsorpsi Metilen Biru Menggunakan Karbon Baggase Teraktivasi Husnul Hatimah; Dahlia Rosma Indah; Intan Kusuma Wardani
Hydrogen: Jurnal Kependidikan Kimia Vol 10, No 2 (2022): Hydrogen: Jurnal Kependidikan Kimia
Publisher : Universitas Pendidikan Mandalika Mataram

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33394/hjkk.v10i2.6410

Lombok Island has a distinctive culture and produces handicraft products with cultural motifs such as traditional woven fabrics of the Sasak tribe. Dyeing of woven fabrics using natural and artificial dyes. For artificial dyes, one of which is methylene blue dye. Residual water or former dyeing in coloring is usually immediately discharged into the environment which causes pollution or hazardous waste for living things. The presence of dyes greatly affects the environment because of their high toxic effects, can cause allergies and skin irritation, and can cause gene changes and are carcinogenic. Based on these problems, processing is needed to reduce the pollutant substances that are generated. One of the technologies used is adsorption using a natural adsorbent that is efficient and easy to obtain, namely activated carbon baggase (bagasse). Bagasse carbon made through the pyrolysis stage (carbonation process) at a certain temperature can be used as an alternative adsorbent for the adsorption of pollutant dyes. This study aims to determine the characteristics and adsorption efficiency of methylene blue by activated carbon baggase. This study used experimental methods with gravimetric techniques, batch techniques, and samples were analyzed using Uv-Vis Spectrophotometry. A 10 mL sample of 10 ppm methylene blue was contacted with one gram of activated carbon baggase. The research was conducted in six stages. The first stage is to prepare activated carbon baggase adsorbents. The second, third, and fourth stages are optimization of the methylene blue solution. The fifth to the sixth stage is the measurement of methylene blue adsorption on activated carbon baggase adsorbents with variations in pH and contact time. Characteristics of activated carbon baggase in this study obtained a moisture content of 4.64% and an ash content of 5.37%. The optimum pH was obtained at pH 5 with an adsorption efficiency of 86.4%, while the optimum contact time was obtained at 80 minutes with an adsorption efficiency of 86.9%. From these results it can be concluded that the activated carbon baggase adsorbent is effective in adsorbing methylene blue so that it can be used to overcome pollution problems caused by dye waste.

Pengaruh Variasi Jumlah Elektroda Dan Jenis Katalis Terhadap Produksi Gas Hidrogen Pada Elektrolisis Air Laut Ayu Lestari; Yeti Kurniasih; Dahlia Rosma Indah; Ahmadi Ahmadi
Jurnal Pendidik Indonesia (JPIn) Vol 5, No 2: Oktober 2022
Publisher : Yayasan Pendidikan Intan Cendekia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.47165/jpin.v5i2.384

Potensi energi terbarukan adalah mengubah air laut menjadi gas hidrogen yang diproduksi melalui proses elektrolisis. Elektrolisis adalah proses pemisahan molekul air (H2O) menjadi gas hidrogen (H2) dan oksigen (O2) dengan mengalirkan arus listrik. Energi gas hidrogen dari air laut tidak menyebabkan polusi, ringan dan sustainable sehingga dapat menjadi salah satu solusi terhadap pengurangan pemanasan global. Ada beberapa faktor yang mempengaruhi proses elektrolisis yaitu penggunaan katalisator dan luas permukaan elektroda. Penelitian ini bertujuan untuk mengetahui adanya pengaruh jumlah elektroda dan jenis katalis terhadap jumlah gas hidrogen yang diperoleh melaui proses elektrolisis air laut. Proses elektrolisis dilakukan dengan memvariasikan jumlah elektroda mulai dari 2,4,6,8 dan 10, serta memvariasikan jenis katalis yang digunakan yaitu HCl, HNO3, dan H2SO4. Berdasarkan hasil penelitian menunjukkan bahwa jumlah elektroda berbanding lurus dengan produksi gas hidrogen massa tertinggi dihasilkan pada jumlah 10 plat elektoda dengan massa sebesar 6,9966 gr. Penambahan katalis pada elektrolisis, massa gas hidrogen tertinggi yang dihasilkan adalah 6,9966 gr pada konsentrasi 0,1 M untuk H2SO4, katalis HCl massa gas hidrogen yang dihasilkan 6,6633 gr pada konsentrasi 0,1 M, dan katalis HNO3 massa gas hidrogen yang dihasilkan 5,6300 gr. Jenis katalis yang optimal digunakan pada proses elektrolisis air laut yaitu H2SO4.

PELATIHAN PEMBUATAN MEDIA PEMBELAJARAN MENGGUNAKAN ADOBE FLASH CS5 PROFESSIONAL BAGI MAHASISWA CALON GURU KIMIA Suryati Suryati; Pahriah Pahriah; Husnul Hatimah; Dahlia Rosma Indah; Hulyadi Hulyadi
Bakti Sekawan : Jurnal Pengabdian Masyarakat Vol 2 No 1 (2022): Juni
Publisher : Puslitbang Sekawan Institute Nusa Tenggara

Rata-rata mahasiswa di Universitas Pendidikan Undikma (UNDIKMA) khususnya mahasiswa program studi pendidikan kimia mempunyai perangkat komputer berupa laptop yang cukup memadai, sayangnya pengetahuan dan keterampilan yang dimiliki oleh mahasiswa calon guru kimia dalam pembuatan media pembelajaran yang interaktif menggunakan Adobe Flash CS5 Profesional masih sangat kurang. Kendala utamanya adalah pengetahuan, kemampuan, dan penguasaan terhadap Adobe Flash CS5 Profesional tersebut. Untuk itu, penanganan terhadap permasalahan di atas dibuat kerangka pemecahan masalah seperti yang terlihat pada. Tujuan yang ingin dicapai dalam kegiatan pengabdian kepada masyarakat ini ialah: (1) agar mahasiswa calon guru kimia di UNDIKMA menjadi terampil dalam pembuatan media pembelajaran LKS Interaktif menggunakan Adobe Flash CS5; (2) mensosialisasikan perangkat lunak Adobe Flash CS5. Hasil pengabdian ini meliputi: (a) pelatihan ini memberikan beberapa materi yang terkait dengan upaya meningkatkan kualitas pembelajaran dengan pemberikan pengetahuan mengenai pemanfaatan Program Adobe Flash CS5 Professional untuk membuat media pembelajaran interaktif yang atraktif dan interaktif; (b) materi yang disajikan dapat diterima, dicerna, dan dipahami mahasiswa; (c) kegiatan berlangsung lancar, tepat waktu dan sesuai dengan yang diharapkan.

Characterization Of Pure and Immobilized Invertase Enzyme Using Activated Carbon Dahlia Rosma Indah; Husnul Hatimah
Hydrogen: Jurnal Kependidikan Kimia Vol 11, No 2 (2023): April 2023
Publisher : Universitas Pendidikan Mandalika

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33394/hjkk.v11i2.8150

This research is conducted to determine the optimum pH, the optimum temperature, the optimum incubation time, Km and Vmaks enzym invertase mobile and immobile. The research variable are the characteristic of enzym invertase mobile and immobile that include the optimum pH, the optimum temperature, the optimum incubation time, Km, Vmaks and the activity of enzym. The instrument of the research is spectronic UV-Vis. The result of the research are absorbance value and henceforth that will be substituted into the similarity of standart liquid invert sugar in regretion curva, from this procedure the researcher find the concentration’s product (invert sugar). This concentration value will be used for determining enzym activities. The data are collected then analyzed by using descriptive method that use a corelation graph between enzym activity and research variable.The result of the research shows that enzym invertase mobile have optimum pH 4.5, optimum temperature 55°C; optimum incubation time 25 minute; Km value 1,279 mg/mL (4,737 x 10-6 mol/L) and Vmaks value 23,256 mg/mL/menit. The enzym invertase immobile have optimum pH 4; optimum temperature 60°C; optimum incubation time 30 minute; Km value 2,255 mg/mL (8,352 x 10-6 mol/L) and Vmaks value 19,608 mg/mL/minute.

Co-Authors Ahmadi Ahmadi Ayu Lestari Citra Ayu Deewi Hendrawani Hendrawani Hulyadi Hulyadi Husnul Hatimah Husnul Hatimah Intan Kusuma Wardani Pahriah Pahriah Ratna Azizah Mashami Suryati Suryati Yeti Kurniasih Yuli Anggraini Putri Yusran Khery

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