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All Journal Jurnal Periodic Jurusan Kimia UNP Biomedika Jurnal Progres Kimia Sains Jurnal Penelitian Pendidikan IPA (JPPIPA) Jurnal Administrasi Pendidikan Indonesia Communications in Science and Technology Chemistry Indonesian Journal of Chemical Research JURNAL PENDIDIKAN TAMBUSAI Eksakta : Berkala Ilmiah Bidang MIPA Jurnal Crystal : Publikasi Penelitian Kimia dan Terapannya Pelita Eksakta Indonesian Journal of Chemical Science and Technology Entalpi Pendidikan Kimia BIOCHEPHY: Journal of Science Education CHEDS: Journal of Chemistry, Education, and Science Automotive Experiences Journal of Educational Sciences MASALIQ: Jurnal Pendidikan dan Sains Entalpi Pendidikan Kimia Chimica Didactica Acta : Journal of Chemistry and Chemistry Education Journal of Global Research Education Jurnal Pendidikan MIPA
Desy Kurniawati
Jurusan Kimia FMIPA Universitas Negeri Padang
Religion Aerospace Engineering Agriculture, Biological Sciences & Forestry Humanities Astronomy Automotive Engineering Biochemistry, Genetics & Molecular Biology Chemical Engineering, Chemistry & Bioengineering Chemistry Civil Engineering, Building, Construction & Architecture Computer Science & IT Control & Systems Engineering Education Electrical & Electronics Engineering Energy Engineering Environmental Science Library & Information Science Materials Science & Nanotechnology Mathematics Mechanical Engineering Medicine & Pharmacology Physics Social Sciences Other

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UJI PENURUNAN KADAR GLUKOSA DARAH OLEH EKSTRAK ETANOL 70% DAUN BUNCIS (Phaseolus vulgaris L) PADA KELINCI JANTAN YANG DIBEBANI GLUKOSA Kurniawati, Desy; Sutrisna, EM; Wahyuni, Arifah Sri
Biomedika Vol 4, No 1 (2012): Biomedika Februari 2012
Publisher : Universitas Muhamadiyah Surakarta

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Abstract

This research aim to know the descent of blood glucose rate by extract etanol 70% of bean leaf at male rabbit which induced glucose. Research using the method test glucose tolerance of oral was including category research of sham eksperimental with complete random attempt device of unidirectional pattern. This research use 20 male rabbits which divided in 5 treatment group. Group I given by CMC Na 1% as negative control, group II given by acarbose suspensi 2,33 mg/kgBB as positive control, group III, IV and V given by extract etanol 70% bean leaf with each dose 200, 300 and 450 mg/kgBB. Treatment given at once after test animal induced glucose 50% ( 5 ml/1,5 kgBB). Glucose blood rate to define every 30 minute, 0 minute until 300 minutes by using method of enzimatik GOD PAP (Glucose Oxidase Phenol Aminoantipyrina Peroxidase), what was later then analysed with one track Anava and continued by test of LSD (Least Significant Diffeerence) with trust level 95%. Extract etanol 70% bean leaf with dose 200, 300 and 450 mg/kgBB have effect descent of blood glucose rate to negative control of CMC Na 1% (p = 0,000) with each percentage descent of blood glucose rate (% PKGD) 80,88 ± 0,93 ; 82,73 ± 0,67 and 85,32 ± 0,21.Keyword : Extract etanol 70%, bean leaf (Phaseolus vulgaris L), degradation of glucose rate
Uji Aktivitas Antibakteri Propolis Trigona spp. Asal Bukit Tinggi Pada Tikus Putih Sprague-Dawle Kurniawati, Desy
Jurnal Progres Kimia Sains Vol 1, No 1 (2011): JPKS Open Acces
Publisher : Universitas Halu Oleo

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Abstract

Penggunaan beberapa antibiotik telah dilarang di banyak negara karena munculnyaresistansi antibiotik pada bakteri patogen terhadap manusia. Tujuan penelitian ini adalahmenganalisis potensi antibakteri Propolis Trigona spp. Propolis diekstraksi dengan maserasiberulang sarang Trigona spp dengan etanol, dan pelarut dihilangkan dengan pengeringanbeku. Tiga jenis propolis digunakan untuk menganalisis potensi antibakteri, propolis mentah,2% propolis mikrokapsul (% M2) dan 4% propolis mikrokapsul (M4%). Hasil penelitianmenunjukkan bahwa terjadi penurunan populasi E coli (raw propolis 5,48 CFU / g, 2,79% M2CFU / g dan M4 % 6,22 CFU / g). Propolis mentah dan% M2 memiliki potensi sebagai agenantibakteri
UJI PENURUNAN KADAR GLUKOSA DARAH OLEH EKSTRAK ETANOL 70% DAUN BUNCIS (Phaseolus vulgaris L) PADA KELINCI JANTAN YANG DIBEBANI GLUKOSA Kurniawati, Desy; Sutrisna, EM; Wahyuni, Arifah Sri
Biomedika Vol 4, No 1 (2012): Biomedika Februari 2012
Publisher : Universitas Muhamadiyah Surakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.23917/biomedika.v4i1.257

Abstract

This research aim to know the descent of blood glucose rate by extract etanol 70% of bean leaf at male rabbit which induced glucose. Research using the method test glucose tolerance of oral was including category research of sham eksperimental with complete random attempt device of unidirectional pattern. This research use 20 male rabbits which divided in 5 treatment group. Group I given by CMC Na 1% as negative control, group II given by acarbose suspensi 2,33 mg/kgBB as positive control, group III, IV and V given by extract etanol 70% bean leaf with each dose 200, 300 and 450 mg/kgBB. Treatment given at once after test animal induced glucose 50% ( 5 ml/1,5 kgBB). Glucose blood rate to define every 30 minute, 0 minute until 300 minutes by using method of enzimatik GOD PAP (Glucose Oxidase Phenol Aminoantipyrina Peroxidase), what was later then analysed with one track Anava and continued by test of LSD (Least Significant Diffeerence) with trust level 95%. Extract etanol 70% bean leaf with dose 200, 300 and 450 mg/kgBB have effect descent of blood glucose rate to negative control of CMC Na 1% (p = 0,000) with each percentage descent of blood glucose rate (% PKGD) 80,88 ± 0,93 ; 82,73 ± 0,67 and 85,32 ± 0,21.Keyword : Extract etanol 70%, bean leaf (Phaseolus vulgaris L), degradation of glucose rate
Pengembangan Soal Berpikir Kritis pada Materi Asam Basa dan Titrasi Asam Basa Hidayati, Rahmi; Kurniawati, Desy
Entalpi Pendidikan Kimia Vol 2, No 1 (2021)
Publisher : Universitas Negeri Padang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24036/epk.v2i1.135

Abstract

Berpikir kritis penting bagi setiap individu. Hal ini dikarenakan kemampuan ini berguna untuk membuat keputusan dan memecahkan masalah. Tujuan penelitian ini adalah untuk menghasilkan soal berpikir kritis pada materi asam basa dan titrasi asam basa yang valid dan praktis. Jenis penelitian ini adalah penelitian dan pengembangan menggunakan model Ploomp dengan tiga tahapan yaitu tahap penelitian awal, tahap pembentukan konsep dan tahap penilaian. Dalam penelitian ini, dikembangkan sebanyak 40 butir soal berpikir kritis dalam bentuk uraian. Validasi soal dilakukan oleh lima orang ahli. Tahap uji coba kelompok kecil dilakukan dengan enam peserta didik dan tahap uji coba lapangan dengan 20 peserta didik SMA Negeri 2 Batusangkar. Teknik analisa data menggunakan CVR Lawshe untuk data konten soal dan skala aiken untuk data konstruk soal. Dari 40 soal berpikir kritis yang dikembangkan, sebanyak 30 item soal valid dan sebanyak 10 item soal tidak valid. Hasil dari uji coba lapangan menunjukan bahwa kemampuan berpikir kritis peserta didik masih rendah.
Pengaruh Ukuran Partikel Biosorben Terhadap Penyerapan Ion Logam Pb(II) Dari Biji Dan Kulit Lengkeng (Euphoria longan Lour) Puja, Puja; Kurniawati, Desy
Periodic Vol 8, No 2 (2019): PERIODIC
Publisher : Jurusan Kimia FMIPA UNP

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (23.431 KB) | DOI: 10.24036/p.v8i2.105077

Abstract

A study about the effect of biosorbent particle size on adsorption Pb ions from seeds and shell lengkeng (Euphoria longan lour) has been conducted. Shell and seeds lengkeng were activated with HNO3 and characterized by FTIR to analyze the mayor functional groups in biosorbent. The effect of seed and shell lengkeng (Euphoria longan lour) on the adsorption capacity of Pb (II) metal ions was carried out with variation 106 μm, 150 μm, 250 μm, and 300 μm. The results obtained from the particle size 106 μm of seed and shell lengkeng have a greater adsorpsition of 25,626 mg/g dan 30,095 mg/g respectively. This study shows that the biosorbent particle size afffects the amount of adsorption of metal ions
Kondisi Optimum Adsorpsi Ion Logam Ni2+ Oleh Silika gel-GPTMS Termodifikasi Sulfonat Ramadhani, Dwi; Oktavia, Budhi; Kurniawati, Desy; Etika, Sri Benti
Periodic Vol 13, No 2 (2024): PERIODIC
Publisher : Departemen Kimia FMIPA UNP

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24036/periodic.v13i2.124480

Abstract

Silica gel is a compound that has two active sides, namely silanol (Si-OH) and siloxane (Si-O-Si) which have not been effective as adsorbents so modifications are made. Silica gel is modified using monosodium salt 4-Amino-5-hydroxy-2,7-naphthalenedisulfonic acid which is reacted first with GPTMS (glycidoxypropyltrimethoxysilane) as a connecting bridge to produce sulfonate-modified silica gel-GPTMS adsorbent. The purpose of this modification is that sulfonate-modified silica gel-GPTMS are made to adsorb Ni2+ metal ions under optimum conditions at pH, contact time and concentration. The adsorption process is carried out using the batch method by seeing how much adsorbent adsorption capacity is made against the absorption of metal ions. The characterization used is an FTIR (Fourier Transform-Infrared) spectrophotometer in the analysis of the adsorbent manufacturing process and SSA (Atomic Absorption Spectrophotometry) to see the results of metal ion absorption. The results obtained according to research that has been conducted show the adsorption of sulfonate-modified silica gel-GPTMS against the absorption of Ni2+ metal ions at optimum conditions is at pH 3 and contact time for 45 with absorption capacities of 1.5265 mg/g and 1.5826 mg/g respectively.
Pengaruh Ukuran Partikel Serta Laju Alir Pada Penyerapan Ion Logam Cr6+ Menggunakan Kulit Langsat (Lansium domesticum) Andini, Namira Tri; Kurniawati, Desy; Zainul, Rahadian; Nasra, Edi
Periodic Vol 13, No 2 (2024): PERIODIC
Publisher : Departemen Kimia FMIPA UNP

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Abstract

Chromium metal is a toxic and carcinogenic metal that needs to be addressed. Biosorption  can be used as one method to reduce lead metal level in waters. Biosorpsian is easy and simpler to use, more-ecomomial, and  environmentally friendly because it utilizes microorganisms and biomaterials. The purpose of this study was to determine the effect of particle size and flow rate on the absorption of Cr6+ metal ions using langsat peel as a biosorbent. In this study, Cr6+metal ions biosorption  was carried out using langsat peel with column method at a particle size variation of 106, 150, 250 and 425µm  and a flow rate variation of 1-4 ml/min. the results of this study were obtained optimum conditions at particle size 106 µm and flow rate 2 mL/min with optimum adsorbtion capacity of 5,02363 and 6,96203 mg/g.
Adsorpsi Zat Warna Methylene Blue Menggunakan Karbon Aktif Kulit Kelengkeng (Euphoria longan lour) Dengan Metode Batch Harmaiyani, Risky; Amran, Ali; Oktavia, Budhi; Kurniawati, Desy
Periodic Vol 12, No 3 (2023): PERIODIC
Publisher : Departemen Kimia FMIPA UNP

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24036/periodic.v12i3.118807

Abstract

In Indonesia, longan skin has not been widely used. Longan skin contains lignin which has good absorption ability. The cause of this research is to calculate the finest absorption capability of longan peel activated carbon against methylene blue dye using the batch method. The results confirmed that the optimum absorption ability for the absorption of methylene blue at pH 4, concentration of 600 ppm, and contact time of 120 minutes at a stirring speed of 200 rpm, and a mass of 0.2 grams was 69.0679 mg/g.
Pengaruh pH dan Waktu Kontak Terhadap Adsorpsi Ion Pb2+ pada Silika Gel-GPTMS Termodifikasi Sulfonat Afrilia, Yoni; Oktavia, Budhi; Kurniawati, Desy; Nizar, Umar Kalmar
Periodic Vol 13, No 1 (2024): PERIODIC
Publisher : Departemen Kimia FMIPA UNP

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24036/periodic.v13i1.124343

Abstract

Adsorption is the process of accumulation of atoms or ions in solution on the surface of a solid adsorbent. Silica gel can be used as an adsorbent because it has two groups of active sites, namely silanol (Si-OH) and siloxane (Si-O-Si). The active groups also allow silica to be modified. This modification was made to increase the ability of silica to adsorb ions, one of which is Pb2+ ion. The modifier compound used is a sulfonic salt (4-amino-5-hydroxy-2,7-naphthalenedisulfonic acid) with a glysidoxypropyltrimethoxysilane (GPTMS) linking compound. The modified adsorbents were characterized by FTIR and the absorption results were characterized by AAS. The modified adsorbent was to determine the optimum conditions for adsorption of Pb2+ ions using silica sulfonate. Adsorption was carried out using the batch method. The optimum absorption conditions for Pb2+ metal ions using silica sulfonate were obtained at pH 3, contact time of 45 minutes.
Pemanfaatan Karbon dari Kulit Buah Kelor (Moringa oleifera) untuk Penjernihan Minyak Jelantah Novela, Riana; Zainul, Rahadian; Kurniawati, Desy; Pernadi, Niza Lian; Rahmi, Maulidia Arsyta; Istiqamah, Siti Sarah; Nizar, Umar Kalmar
Periodic Vol 13, No 1 (2024): PERIODIC
Publisher : Departemen Kimia FMIPA UNP

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24036/periodic.v13i1.124150

Abstract

The high demand for cooking oil causes scarcity and increases the price of cooking oil in the market. Despite the scarcity, people still use it by heating it repeatedly. Cooking oil that has been used repeatedly is called used cooking oil which contains saturated fatty acids which will have a negative impact on health if reused. Therefore, this study aims to clarify used cooking oil by using carbon from moringa peels to improve the quality of used cooking oil. Moringa fruit peel contains cellulose and hemicellulose so that it can be used as a carbon source using the calcination method and tested for approximation such as tests for ash content, vapor content and bound carbon. Furthermore, carbon is applied in the clarification of used cooking oil by adsorption method. After the used cooking oil has been clarified, the properties of the used cooking oil are tested, such as density, flow rate, acid number and saponification number. The result of this research is that the resulting Moringa peel carbon at 250 - 350oC complies with the SNI 06-3730-2021 standard. The application of Moringa peel carbon in used cooking oil has been shown to reduce the density value to 0.886 g/mL, an acid number of 4.476 mg/KOH, and succeeded in increasing the value of the flow rate to 0.735 and the saponification number to 351.751 mg/KOH.
Co-Authors Addawiyah, Nadiyatul Afifi, Rayhanil Afrilia, Yoni Aini, Syamsi Ali Amran Alizar Alizar, Alizar Alkhaira, Nisa Ana, Aziza Putri Andini, Namira Tri Andrean, Maifil Dwi Andromeda Anjelia, Mariza Ardi, Ahmad Maulana Arifah Sri Wahyuni Astuti Barkah, Fitri Annisa Benti Etika, Sri Budhi Oktavia Darussalam, Rahni Darwin Rio Budi Syaka Della Rosalynna Stiadi Dwi Finna Syolendra DWI RAMADHANI Edi Nasra Elsa Yuniarti Elviana Clara Manalu, Volma Em Sutrisna Fadhilah Fadhilah Faradina, Rela Fariz Adzani, Rivaldo Fatmawati, Rani Fauzana Gazali Firanti, Feyges Frilla Fitri Amelia Fitri, Bali Yana Fitria Ningsih, Rahmadhani Frista, Nada Gama Yoga, Nugroho Hafifah, Haifa Hamid, Syafira Putri Haqqu, Annisa Hardeli Hardeli Hardeli Hardianti, Amirah Salsabila Harmaiyani, Risky Hary Sanjaya Hasyim, Rahmat Heditama, Muhammad Raffi Hidayah, Rahma Holidayani Husna, Miftahul Ideal, Flami Luthfianisa Ifan Rivaldo Ikhsany, Diva Indang Dewata Indasyach Moreno, Zavi Intan Lestari Iqbal, Anwar Iryani Iryani Istiqamah, Siti Sarah Iswendi iswendi Jayawarsa, A.A. Ketut Karmila, Aroma Kartika, Reka Khairurrazak, Khairurrazak Kiki Amelia, Kiki Laily Nurliana Latisma, Latisma Lestari, Kardina Mahmud Mahmud Maida, Margarita Claudya Mardhatillah Nadien, Rahmah Mardi Marlini, Rahmida Martha, Rahma Dyan Marthin, Emmilya Febri Mawardi Miftahul Khair Muhammad Rayhan Mulia, Melindra Mutia, Nuraini Cut Nadia Nadia Nandi, Mila Lusy Tri Nizar, Umar Kalmar Nofianti, Nora Nofrianto Nofrianto Novela, Riana Nur Fitri Nurazmi, Suci Nurhayati Nurhayati Nurrahma, Yashinta Oktaviana, Najwa Annisa Parbuntari, Hesty Pasaribu, Nur Rizky Patricia, Popi Permana, Agus Agung Pernadi, Niza Lian Puja, Puja Putra Mustafit, Alvian Putra, Ananda Putri Ana, Aziza Putri Rinjani, Mitna Sekar Putri, Anisa Dwi Putri, Molsa Vitaloka Putri, Raisya Pratama Raden Mohamad Herdian Bhakti Rafael, Muhammad Rahadian Zainul Rahayu Ningsih, Sri Rahmi, Maulidia Arsyta Rantika Putri, Dwi Rara Bahri, Rayhani Riga Rio Budi Syaka, Darwin Risnawaty Risnawaty Risty, Chika Mei Romy Dwipa Yamesa Away Ronald, Meissa Lifangrha Rosalinda, Gigih Devy Safitri, Nadila Sari, Trisna Kumala Sepriyeni Oktavia, Syntia Sherly Kasuma Warda Ningsih Sri Benti Etika Stiadi, Della Rosalyna Sukarno, Ragil Suprawati, Vina Suryani, Okta Syamsul Arifin Tarmizi, Fadhilah Ulianas, Alizar Veronita, Silvi Witri, Rahmi Eka Yeni, Isra Yerimadesi Yerimadesi Yerimadesi Yoga, Nugroho Gama Yohanes Gunawan, Yohanes Yola, Servi Farda Yuranda, Fitri Zakiya, Ratu