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Desy Kurniawati
Universitas Negeri Padang
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Pengembangan Media Pembelajaran Berbasis Android Menggunakan Lectora Inspire pada Materi Larutan Penyangga Kelas XI SMA Desy Kurniawati; Afdina Afdina
JURNAL PENDIDIKAN MIPA Vol 13 No 1 (2023): JURNAL PENDIDIKAN MIPA
Publisher : Pusat Publikasi Ilmiah, STKIP Taman Siswa Bima

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.37630/jpm.v13i1.836

Abstract

Jenis penelitian ini adalah Educational Design Research (EDR) dengan menggunakan model pengembangan plomp yang terdiri dari 3 tahap yaitu tahapan pendahuluan, prototipe dan penilaian. Pada penelitian ini penulis membatasi penelitian yang dilakukan sampai pada tahap prototipe yang menghasilkan prototipe III. Penelitian ini bertujuan untuk mengembangkan media pembelajaran interaktif berbasis android serta menentukan tingkat validitasnya dan diharapkan mampu membantu guru dalam mengatasi kendala pembuatan media pembelajaran pembelajaran khususnya pada materi larutan penyangga. Uji validitas aplikasi media pembelajaran dilakukan oleh delapan orang validator yaitu empat orang dosen kimia FMIPA, dua orang dosen FT UNP dan dua orang guru SMA Pertiwi 1 Padang. Data yang didapatkan dari validator selanjutnya dianalisis menggunakan Aiken’s V. Hasil penelitian ahli materi didapatkan nilai rata-rata Aikens’ V untuk aspek kelayakan isi, konstruk, kebahasaan dan kegrafisan berturut-turut sebesar 0,91; 0,89; 0,93 dan 0,84 dengan kategori valid dan hasil penelitian ahli media didapatkan nilai rata-rata Aiken’s v untuk aspek tampilan, pemprograman dan pemanfaatan berturut turut sebesar 0,84; 0,94; dan 0,81 dengan kategori valid. Berdasarkan hasil penelitian dapat disimpulkan bahwa media pembelajaran interaktif berbasis android menggunakan lectora inspire pada materi larutan penyangga kelas XI SMA yang dihasilkan sudah valid. Oleh karena itu penelitian ini dapat dilanjutkan ketahap uji praktikalitas dan efektifitas.
Studi Kompleks Assosiasi Pb(II) Menggunakan KI dan Methylene Blue Fadilla Yuri Merti; Edi Nasra; Desy Kurniawati
Jurnal Periodic Jurusan Kimia UNP Vol 12, No 1 (2023): PERIODIC
Publisher : Departemen Kimia FMIPA UNP

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24036/p.v12i1.117050

Abstract

Research has been carried out on the study of the Pb(II) association complex using KI and methylene blue. This study aims to find the optimum conditions for the Pb(II) association complex such as optimum time, Iodidae concentration, pH, and methylene blue concentration. The measurement methods used are UV-Vis spectrophotometry and AAS (Atomic Absorption Spectrophotometer). Pb(II) is reacted with excess Iodidae to form an anion complex (PbI42-). The anion complex formed is then reacted with a methylene blue (MB+) cation complex to form an association complex [MB]2[PbI4]. From the results of the study, it was found that the optimum conditions for the formation of anion complexes (PbI42-) at 2 hours, a concentration of 0.4 M with an absorbance of 0.1069 A at anion wavelength of 266 nm. While the optimum conditions for the association complex [MB]2[PbI4] occurred at a wavelength of 665 nm with an absorbance of 0.6119 A, pH 3 with an absorbance of 0.9675 A and a concentration of 0.0012 % methylene blue with an absorbance of 0.1266 A. The association complex The resulting product was contacted with Pb(NO3)2 at a concentration of 0.01 ppm and was successfully concentrated by obtaining a concentration of 0.6387 ppm and an absorbance value of 0.0092 A. So that a concentration factor of 63.87 times was obtained.
Optimasi Penyerapan Anion Klorida Menggunakan Silika Gel (SiO2) GPTMS Dimodifikasi dengan Dimetilamina Nur Hafni Hasibuan; Budhi Oktavia; Edi Nasra; Desy Kurniawati
Jurnal Periodic Jurusan Kimia UNP Vol 12, No 1 (2023): PERIODIC
Publisher : Departemen Kimia FMIPA UNP

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24036/p.v12i1.116185

Abstract

Ion chloride (Cl-) is an anion that can combine with several cations to form a water-soluble salt. High chloride content in water can accelerate the rusting process on metal. So that in this research the aim is to determine the optimum conditions for the absorption of chloride anions using silica. Adsorption using silica is able to absorb anions. However, modifications are needed to improve silica adsorption. In this study, Dimethylamine was used as a modifier and Glisidoxypropyltrimethoxysilane as a bridge between silica and dimethylamine. To determine the changes in the functional groups of silica, silica-GPTMS, silica-GPTMS DMA, and silica-GPTMS DMA with chloride ions, the FTIR test was carried out. The absorption step was carried out by varying the pH (6,7,8,9, and 10), contact time (30,60,90,120, and 150 minutes), and concentration (5, 10, 15, 20, and 25 mg/L). . The results showed that the optimum conditions for absorption occurred at pH 7, contact time of 120 minutes, and a concentration of 20 mg/L with an absorption capacity of 0.250825 mg/g.
Pelatihan Pembuatan Pupuk Bokashi dan Pakan Lele dari Kotoran Burung Puyuh Kepada Peternak Nagari Mungka Trisna Kumala Sari; Riga Riga; Isra Yeni; Syamsi Aini; Desy Kurniawati; Romy Dwipa Yamesa Away; Melindra Mulia
Jurnal Pengabdian Pada Masyarakat Vol 8 No 2 (2023): Jurnal Pengabdian Pada Masyarakat
Publisher : Universitas Mathla'ul Anwar Banten

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30653/jppm.v8i2.410

Abstract

Belakangan ini usaha peternakan burung puyuh semakin berkembang di Nagari Mungka. Namun pengolahan kotoran burung puyuh dari aktivitas ini belum ditangani dengan baik. Hal ini disebabkan masih minimnya pengetahuan peternak tentang teknologi pengolahan limbah kotoran puyuh. Pelatihan ini bertujuan untuk meningkatkan pengetahuan peternak burung puyuh tentang pemanfaatan kotoran burung puyuh menjadi pupuk bokashi dan pakan lele, sehingga berpotensi untuk meningkatkan profit usaha peternak burung puyuh di masa mendatang. Metode pelaksanaan dilakukan dengan dua cara yaitu dengan memberikan teori dan demonstrasi pembuatan pupuk bokashi dan pakan lele dari kotoran burung puyuh. Edukasi yang diberikan berupa pengetahuan tentang dampak negatif dari kotoran burung puyuh dan manfaatnya jika diolah menjadi pupuk bokashi dan pakan lele, serta bagaimana strategi pemasarannya. Evaluasi dilakukan dengan mengisi kuesioner oleh peternak dan meninjau hasil pelatihan. Dari hasil kuesioner diketahui hampir 80-100% pengetahuan peternak meningkat setelah mengikuti pelatihan. Ini merupakan ilmu baru bagi peternak dan kegiatan ini sangat bermanfaat khususnya bagi peternak burung puyuh. Recently, the quail farming business has been growing in Nagari Mungka. However, the processing of quail feces of this activity has not been properly treated. This is due to the lack of knowledge of farmers about technology of this quail feces waste treatment. This training aims to increase the knowledge of quail farmers on the use of quail feces into bokashi fertilizer and catfish feed, so that it has the potential to increase their business profits in the future. The implementation method is carried out in two ways, namely by providing theory and demonstrating on making bokashi fertilizer and catfish feed from quail feces. The education provided is in the form of knowledge about the negative impact of quail feces and the benefits of quail feces if it is processed into bokashi fertilizer and catfish feed, as well as marketing strategies. Evaluation is carried out by filling out questionnaires by farmers and reviewing the results of the training. From the results of the questionnaire, it is known that almost 80-100% of the knowledge of farmers increase after participating in the training. This is new knowledge for farmers and this activity is very useful, especially for quail farmers.
Edukasi Pengelolaan Sampah Rumah Tangga untuk Mewujudkan Lingkungan Bersih di Kelurahan Teluk Kabung Tengah Kecamatan Bungus Teluk Kabung Kota Padang Desy Kurniawati; Indang Dewata; Sri Benti Etika; Umar Kalmar Nizar; Suryelita Suryelita; Melindra Mulia; Trisna Kumala Sari; Niza Lian Pernadi
Jurnal Pengabdian Pada Masyarakat Vol 8 No 3 (2023): Jurnal Pengabdian Pada Masyarakat
Publisher : Universitas Mathla'ul Anwar Banten

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30653/jppm.v8i3.420

Abstract

Sampah merupakan salah satu persoalan mendasar terhadap lingkungan di Kelurahan Teluk Kabung Tengah, Kecamatan Bungus Teluk Kabung. Pengelolaan yang tidak tepat terhadap sampah menyebabkan pencemaran terhadap lingkungan terutama jika dibuang begitu saja pada aliran sungai yang bermuara pada pantai, bahkan dapat menyebabkan bencana banjir terhadap area pemukiman. Untuk mengatasi dampak pencemaran lingkungan dari pembuangan sampah perlu adanya solusi, yaitu penyuluhan dan edukasi mengenai bagaimana pengelolaan sampah rumah tangga diantaranya dengan memilah sampah sebelum dibuang dan menerapkan metode 3R (reuse, reduce dan recycle). Melalui sosialisasi, edukasi dan aplikasi pada masyarakat khususnya ibu-ibu Pemberdayaan Kesejahteraan Keluarga (PKK), kegiatan pengabdian ini secara keseluruhan dapat menjadi solusi permasalahan sampah dari hulu. Diantara penerapan metode 3R yang telah diaplikasikan pada masyarakat yaitu dengan melakukan daur ulang sampah organik rumah tangga oleh ibu ibu-ibu PKK menjadi beberapa produk yang bernilai ekonomis, yaitu Eco-enzyme, Pupuk Organik Cair (POC), dan kompos. Dengan diberikannya penyuluhan dan edukasi mengenai pengelolaan sampah rumah tangga pada kegiatan pengabdian pada masyarakat di kelurahan Teluk Kabung Tengah Kecamatan Bungus Teluk Kabung pada akhirnya dapat mendukung tercapainya kondisi lingkungan yang bersih, sehat dan nyaman. Waste is one of the fundamental environmental problems in Teluk Kabung Tengah urban village, Bungus Teluk Kabung sub-district. Improper management of waste causes pollution to the environment, especially if it is simply disposed of in the river that empties into the beach, and can even cause floods to residential areas. To overcome the impact of environmental pollution from waste disposal, a solution is needed, namely counseling and education on how to manage household waste, including sorting waste before disposal and applying the 3R method (reuse, reduce and recycle). Through socialization, education and application to the community, especially mothers of Family Welfare Empowerment (PKK), this community service activity can be a solution to the upstream waste problem. Among the applications of the 3R method that have been applied to the community are recycling household organic waste by PKK mothers into several economically valuable products, namely Eco-enzyme, Liquid Organic Fertilizer (POC), and compost. By providing counseling and education on household waste management in community service activities in Teluk Kabung Tengah urban village, Bungus Teluk Kabung sub-district, it can ultimately support the achievement of clean, healthy and comfortable environmental conditions.
Desorpsi Anion Klorida (Cl-) Dari Adsorben Silika Mesopori Template CTAB (Cetiltrimetilammoniumbromida) Termodifikasi Dimethylamine Fadhilatu Zikra; Budhi Oktavia; Ananda Putra; Desy Kurniawati
Periodic Vol 12, No 2 (2023): PERIODIC
Publisher : Departemen Kimia FMIPA UNP

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

Abstract

Mesopore silica was prepared using sodium silica as a precursor and CTAB as a templating agent. However, silica has limitations in adsorption and desorption of chloride anions. Therefore, it is necessary to modify it to improve the action of mesopore silica. This study used DMA (dimethylamine) as a modifier with glycidoxypropyltrimethoxysilane (GPTMS) linking compound. Adsorption was carried out by injecting the adsorbate solution into the column containing the adsorbent at pH 7, and the optimum concentration was 20 mg/L. Furthermore, desorption was carried out by comparing the best desorption agents using acid desorption agents, namely nitric and sulfuric acids. The study showed that the percentage of nitrate desorption (95,29%)> sulfate (47,64%). After obtaining the best type of desorbing agent, desorption was carried out using nitrate with a concentration variation of (0,02; 0,04; 0,06; 0,08; 0,1) M. The optimum conditions for desorption of chloride anions on the modified mesoporous silica adsorbent were at 0,06 M.
Pengaruh Massa Biosorben Terhadap Penyerapan Ion Logam Cu(II) Oleh Ekstrak Pektin dari Kulit Buah Kedondong (Spondias dulcis) Elinda Fithriana; Trisna Kumala Sari; Indang Dewata; Desy Kurniawati; Romy Dwipa Yamesa Away
Periodic Vol 12, No 2 (2023): PERIODIC
Publisher : Departemen Kimia FMIPA UNP

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24036/periodic.v12i2.118466

Abstract

Several industrial activities such as fertilizer industry, mining, battery, electronics and machinery can cause heavy metal pollution and one of them is Cu(II) heavy metal. At high levels of metal concentrations of Cu(II) will be very dangerous for the environment and living things, so it is necessary to find a solution to overcome the problem of metal pollution of Cu(II) is. One method that can be used is the biosorption method. In this study, pectin extract from kedondong fruit peel was used as a biosorbent. This research was conducted to determine the optimum mass of biosorbent in the biosorption process. Then the pectin characterization was carried out the Fourier Transform Infra Red instrument, then the absorbed Cu(II) metal content was determined using the Atomic Absorption Spectroscopy instrument. From this study, the optimum mass of biosorbent was 0.1 gram with an absorption capacity of 2,940 mg/g.
Optimasi Penyerapan Malachite Green Menggunakan Biosorben Kulit Matoa (Pometia pinnata) dengan Metode Batch Dwi Hartati; Desy Kurniawati; Edi Nasra
Periodic Vol 12, No 2 (2023): PERIODIC
Publisher : Departemen Kimia FMIPA UNP

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24036/periodic.v12i2.118255

Abstract

This study aims to determine the optimum conditions for absorption of malachite green dye waste using matoa fruit peel biosorbent (Pometia pinnata) using a batch method with variations in particle size and contact time which will be tested with UV-Vis spectrophotometer instruments. Before being used as a biosorbent, matoa skin was activated first using 0.01 M HNO3. Activation of the biosorbent was carried out to improve the performance of the biosorbent because activation can enlarge the pores and volume of the biosorbent as well as the impurities contained in the biosorbent. The results showed that the optimum conditions for variations in particle size were 106 µm with an absorption capacity of 44.08 mg/g and a contact time of 90 minutes with an absorption capacity of 46.67 mg/g.
Pengaruh pH dan Konsentrasi Terhadap Penyerapan Ion Logam Pb2+ Menggunakan Kulit Buah Matoa (Pometia pinnata) Deva Indriyani; Edi Nasra; Budhi Oktavia; Hesty Parbuntari; Desy Kurniawati
Periodic Vol 12, No 2 (2023): PERIODIC
Publisher : Departemen Kimia FMIPA UNP

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24036/periodic.v12i2.117509

Abstract

This research study was to determine the optimum conditions for the absorption of Pb2+ metal ions using the matoa fruit peel (Pometia pinnata) using the batch method with variations in pH, concentration, particle size, contact time and stirring speed. The results of the study showed that the optimum conditions for the absorption of Pb2+ occurred at pH 5, a concentration of 300 ppm with an absorption capacity of 34.015 mg/g. Pb2+ metal adsorption isotherm with matoa skin biosorbent (Pometia pinnata) tends to follow the Freundlich isotherm equation with a determinant coefficient (R) of 1.Keywords : Biosorption, Pb2+ metal, Pometia pinnata, Batch method
Isolasi dan Karakterisasi α-Selulosa Dari Kulit Buah Matoa (Pometia pinnata) Fauzan Aulia Akbar; Edi Nasra; Desy Kurniawati; Deski Beri; Hary Sanjaya
Periodic Vol 12, No 2 (2023): PERIODIC
Publisher : Departemen Kimia FMIPA UNP

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24036/periodic.v12i2.117793

Abstract

Cellulose isolation from the matoa fruit peel (Pometia pinnata) has been carried out by means of acid hydrolysis and alkaline hydrolysis. The purpose of this study was to isolate cellulose in the peel of matoa fruit and determine what is the purity level of cellulose contained in the peel of matoa fruit, FTIR is used to identify cellulose functional groups in matoa fruit peel. Results of this study, an yeild of the results of cellulose isolation of matoa peel was 41.3% with the purity level of cellulose of matoa fruit peel of 47.63%. The results of characterization using FTIR are known to have cellulose groups contained in the matoa peel such as -OH, -CH, and C-O groups which are the main functional groups in cellulose.
Co-Authors Afdina Afdina Ali Amran Ananda Putra Annisa Nabila Rahma Aroma Karmila Azhma Ulya Berliana Salsabila Budhi Oktavia Delfitri Delfitri Deski Beri Deva Indriyani Dewi Rika Aryani Dwi Hartati Edi Nasra Elinda Fithriana Fadhilatu Zikra Fadilla Yuri Merti Fauzan Aulia Akbar Fauzana Gazali Hardeli Hardeli Hary Sanjaya Hesty Parbuntari Indang Dewata Latisma Latisma Mufi Nasda Mulia, Melindra Nesya Febi Utami Niza Lian Pernadi Nofrianto Nofrianto Nova Fitriani Nur Hafni Hasibuan Riga Riga Romy Dwipa Yamesa Away Salmariza Sy. Sri Benti Etika Suryelita . Syamsi Aini Trisna Kumala Sari Umar Kalmar Nizar Yani Puspita Yani Yeni, Isra Yona Prestica