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All Journal Jurnal Dikdas Jurnal Kreatif Tadulako Online Kreatif agriTECH Unnes Science Education Journal Jurnal Penelitian Pendidikan IPA (JPPIPA) Jurnal Akademika Kimia Chimica et Natura Acta Indonesian Journal of Chemistry JANGKA Husada Mahakam: Jurnal Kesehatan Abdi Dosen : Jurnal Pengabdian Pada Masyarakat Jurnal Pendidikan Guru (JPG) Panrannuangku Jurnal Pengabdian Masyarakat Journal for Lesson and Learning Studies Jurnal Kajian Pariwisata Media Eksakta Jurnal Akademika Kimia Mahakam Nursing Journal (MNJ) Jurnal Cendekia Ihya Mitra Sains Jurnal Akademika Kimia

Siti Nuryanti

Department Of Chemistry, Faculty Of Teacher Training And Education, Tadulako University, Jln. Soekarno-Hatta Km 8, Palu

Author-ID : 336058

Religion Agriculture, Biological Sciences & Forestry Humanities Biochemistry, Genetics & Molecular Biology Chemical Engineering, Chemistry & Bioengineering Chemistry Decision Sciences, Operations Research & Management Education Engineering Environmental Science Health Professions Languange, Linguistic, Communication & Media Library & Information Science Materials Science & Nanotechnology Mathematics Medicine & Pharmacology Nursing Physics Public Health Social Sciences Other

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PELATIHAN PENYUSUNAN LEMBAR KERJA PESERTA DIDIK (LKPD) UNTUK PRAKTIKUM DIMASA PANDEMI COVID BAGI MGMP KIMIA KOTA PALU Sitti Rahmawati; Baharuddin Hamzah; Siti Nuryanti; Afadil S
Abdi Dosen : Jurnal Pengabdian Pada Masyarakat Vol. 6 No. 1 (2022): MARET
Publisher : LPPM Univ. Ibn Khaldun Bogor

Permasalahan mitra (guru-guru yang tergabung dalam MGMP kimia kota Palu) adalah: a) Kemampuan guru dalam memahami makna, manfaat, dan cara penggunaan media pembelajaran masih rendah, b) Kemampuan dalam pengetahuan media pembelajar ataupun pembuatan LKPD (Lembar Kerja Peserta Didik), untuk keperluan pengganti praktikum di laboratorium sekolah menjadikan rendahnya produktivitas guru dalam mengembangkan materi ajar ke dalam media pembelajaran dan LKPD, c) Pihak sekolah belum menyediakan media atau software komputer yang mendukung dalam pembuatan media pembelajaran dan LKPD praktikum secara online ataupun dengan memanfaatkan materi yang ada di sekitar peserta didik, d) Kurangnya narasumber yang bisa ditempati bertanya jika guru mengalami kesulitan untuk membuat media pembelajaran ataupun membuat LKPD untuk keperluan pengganti praktikum di laboratorium sekolah. Untuk itulah kami menganggap perlu dilakukan suatu kegiatan yang mampu meningkatkan pemahaman dan keterampilan para guru dalam mengembangkan profesionalisme, khususnya dalam pengembangan media pembelajaran ataupun membuat LKPD untuk keperluan pengganti praktikum di laboratorium sekolah. Kegiatan yang akan dilaksanakan meliputi ceramah tentang pentingnya penguasaan konsep dan praktikum dalam pembelajaran kimia, memberikan contoh LKPD untuk kegitan eksperimen/praktikum berbasis lingkungan selanjutnya kerja praktek dimana para peserta dibimbing/didampingi oleh tim pengabdi, mulai dari memberikan informasi kepada guru-guru yang diperkirakan sangat menunjang untuk penguasaan konsep selanjutnya, mendesain LKPD dengan metode eksperimen/praktikum berbasis lingkungan, serta menyesuaikan dengan kompetensi dasar yang hendak dicapai. Setiap kegiatan di damping oleh tim pengabdi dan pada kegiatan akhir, masing-masing guru menyerahkan hasil pekerjaannya. Kegiatan pengabdian ini menghasilkan LKPD berbasis lingkungan yang aman dan mudah dilakukan oleh siswa.

Isolation of Anthocyanidin from Wora-Wari Flowers (Hibiscus rosa sinensis L.) and Its Application As Indicators of Acid-base Siti Nuryanti; Indarini Dwi Puspitasari; Ratman Ratman
agriTECH Vol 33, No 3 (2013)
Publisher : Faculty of Agricultural Technology, Universitas Gadjah Mada, Yogyakarta, Indonesia

Wora-wari plants are easily cultivated and founded in Indonesia, also their bloomy is not seasonal. Isolation of anthocyanidin from Wora-wari was done by maceration using n-hexane, ethyl acetate and methanol-HCl 1.0% and isolation of anthocyanidin was performed by column chromatography. Identification for structure of anthocyanidin was done by UV-Vis spectrophotometer, FT-IR, 1H- and 13C-NMR along with color reagent. In the Wora-wari flowers, it has been identified the existence of anthocyanidin pelargonidin. The color change of anthocyanidin pelargonidin results in acid solution was red and base solution was green.

ISOLATION ANTHOCYANIN FROM ROSELLE PETALS (Hibiscus sabdariffa L) AND THE EFFECT OF LIGHT ON THE STABILITY Siti Nuryanti; Sabirin Matsjeh; Chairil Anwar; Tri Joko Raharjo
Indonesian Journal of Chemistry Vol 12, No 2 (2012)
Publisher : Universitas Gadjah Mada

This study was conducted to isolate anthocyanins from roselle petals and testing the stability toward light. Isolation of anthocyanin was accomplished by extracting roselle petals using eluents with different polarity levels. Nonpolar compounds was eliminated using n-hexane, then semipolar compounds extracted with ethyl acetate and isolated anthocyanin by solvent mixtures of methanol-HCl 0.5%. Color test to determine the presence of anthocyanin was performed with NH3 vapor, Pb-acetate 1% and Pb-nitrate 5%. The structure of anthocyanin in the roselle flower was determined using UV-Vis spectrophotometer, FT-IR and 1H-NMR. Anthocyanin stability test of the influence of light carried out in a room without light conditions (dark room) and light 25 Watt at 31 °C. The results showed that the roselle petals contain anthocyanin cyanidin-3-glucoside. Light has been found to affect the stability of anthocyanin cyanidin-3-glucoside.

Analisis Vitamin C Pada Buah Rambusa (Passiflora foetida L.) Karmila Karmila; Siti Nuryanti
Media Eksakta Vol 17 No 1 (2021)
Publisher : Universitas Tadulako

The rambusa plant (Passiflorafoetida L) grows wild and vines. The fruit is small round green when it is raw and light yellow when the fruit is ripe. Rambusa fruit contains useful substances for improving people's nutrition, one of them is vitamin C which is needed by human as a source of antioxidants. This study aimed to determine the levels of vitamin C in raw and riperambusa fruit extracts. The vitamin C levels were analysed by iodimetric titration. The results obtained vitamin C levels in raw rambusa fruit was 1.31 mg/g and in the ripe was 2.21 mg/g, respectively. This data shows that vitamin C levels in rambusa fruit increase based on the level of maturity.

PELATIHAN PENGEMBANGAN BAHAN AJAR DIGITAL UNTUK KELOMPOK MGMP KIMIA KOTA PALU MENGGUNAKAN ICE CREAM RECORDER Afadil Afadil; Sitti Rahmawati; Siti Nuryanti; Anang Wahid M. Diah; Yuli Nurmayanti
Abdi Dosen : Jurnal Pengabdian Pada Masyarakat Vol. 6 No. 2 (2022): JUNI
Publisher : LPPM Univ. Ibn Khaldun Bogor

Di masa Pandemi Covid-19 telah terjadi perubahan mendasar dalam pelaksanaan pembelajaran kimia Perkuliahan tatap muka dan praktek di laboratorium untuk mengakomodasi keterhubungan tiga level representasi tidak lagi dapat dilaksanakan. Pembelajaran kimia digantikan secara penuh melalui pembelajaran online. MGMP Kimia di Kota Palu menyadari pentingnya melakukan berbagai upaya agar proses pembelajaran kimia berjalan baik dari segi penyampaian materi pembelajaran maupun pelaksanaan praktikum di laboratorium. Salah satu aplikasi yang bisa digunakan dengan mengkombinasikan berbagai media pembelajaran yang selama ini digunakan oleh guru-guru kimia (antara lain: aplikasi zoom, whatsapp, Google Class Room, LMS, dll) adalah mengunakan Ice Cream Screen Recorder. Peserta pelatihan sebanyak 40 orang yang merupakan guru-guru mata pelajaran kimia yang tergabung dalam kelompok MGMP Kimia SMA Kota Palu. Kegiatan pengabdian pada mitra Musyawarah Guru Mata Pelajaran (MGMP) Kimia kota Palu dalam Bahan Ajar Digital Menggunakan ice cream recorder dalam pembelajaran online, telah terlaksana dengan baik berkat kerjasama yang baik dengan berbagai pihak. Hal tersebut tergambar dengan adanya luaran berupa bahan ajar digital menggunakan ice cream recorder yang telah peserta buat dari hasil pelatihan dan pendampingan pengabdian ini.

Antioxidant Activity Test of Red Spinach’s Extract (Blitum rubrum) in Ethanol Solvent and Water Solvent with DPPH Nur A. O. Buhang; Siti Nuryanti; Daud K. Walanda
Jurnal Akademika Kimia Vol. 8 No. 3 (2019)
Publisher : Universitas Tadulako

The study of red spinach antioxidants (Blitum rubrum) in two types of solvents i.e ethanol and water has been performed. The purpose of this study was to determine the antioxidant activity of red spinach extract from Tinombo Selatan district, Central Sulawesi. Red spinach was macerated in ethanol and water to obtain variations of extract concentrations of 20, 40, 60, and 80 mg/L. Free radicals used were DPPH reagents while vitamin C was used as a positive control. The measurement of absorbance of red spinach’s extract was conducted by spectrophotometric. The results showed that IC50 extract of red spinach in ethanol and water were 51.404 mg/L and 52.227 mg/L, while the value of IC50 vitamin C in ethanol and water solvent was 43.241 mg/L and 140.507 mg/L. Based on the IC50 red spinach’s extract in ethanol and water have strong antioxidant activity.

Analysis of Vitamin C in Kecombrang (Etlingera elatior) Lis K. Djaledje; Mery Napitupulu; Siti Nuryanti
Jurnal Akademika Kimia Vol. 8 No. 4 (2019)
Publisher : Universitas Tadulako

Flower kecombrang contains nutrient that are beneficial to the community's nutritional improvement one of vitamin C is needed by the body and as a source of antioxidants. This study aims to determine the levels of vitamin C in flower buds and blooms. Analysis of vitamin C levels in the sample was performed by titration of the iodimetric method. The results of analysis, obtained levels of vitamin C in buds kecombrang flowers were 26.40 mg/100 g and the bloom was 44.26 mg/100 g. The data above showed that vitamin C levels in flower kecombrang increased based on the level of maturity.

Antioxidant Activity Test of Ethanol and Water Extracts of Celery (Apium graveolens L.) Nurmiati Nurmiati; Siti Nuryanti; Tahril Tahril
Jurnal Akademika Kimia Vol. 9 No. 2 (2020)
Publisher : Universitas Tadulako

This study aimed to determine the antioxidant activity of ethanol and water extracts of celery (Apium graveolens L.). Antioxidant activity test in this study used DPPH (2,2-diphenyl-1-picrylhydrazine) as a source of free radicals and vitamin C as a positive control. The antioxidant activity of celery extracts was analyzed using a UV-VIS spectrophotometer. Celery powder was extracted by firstly the maceration method using different solvents (ethanol and water) and secondly with the decoction method using water solvents. Celery extract was tested for antioxidant activity with various concentrations of 20, 40, 60, and 80 ppm. The results obtained that water extract (maceration) had a very strong antioxidant power with 23.713 ppm of IC50 values, for ethanol extract (maceration) had a strong antioxidant power with 59.492 ppm of IC50 value, water extract (dekok) had also a very strong antioxidant with 77.446 ppm of IC50 value, and vitamin C had a very strong antioxidant power with 15.631 ppm of an IC50 value. Based on the IC50 value obtained, the water extract by the maceration method was very good to be used as a source of natural antioxidants, because it had a very strong antioxidant activity value which was equivalent to vitamin C.

Emulsion Stability Tes and Effect of HNO3 Concentration in the Internal Phase on Cadmium Ion Extraction using Liquid Membrane Emulsion Technique Sahida Sahida; Baharuddin Hamzah; Siti Nuryanti
Jurnal Akademika Kimia Vol. 9 No. 1 (2020)
Publisher : Universitas Tadulako

Study on the emulsion stability and cadmium ion extraction tests was performed using the liquid membrane emulsion technique. This study aimed to determine the emulsion stability between the membrane phase and the internal phase with the variation of the ratio (2:1, 1:1, 2:3, and 1:2), and to determine the maximum conditions of cadmium ion extraction in a solution including the various concentration of HNO3 solution 1, 1.5, 2, and 2.5 M. This study is a laboratory experimental method using benzoyl acetone compound as cation carrier, kerosene as membrane phase, HNO3 solution as the internal phase, span-20 and span-80 as surfactants, and cadmium solution as the sample solution. Cadmium ion concentration in the external phase was determined by UV-VIS spectrophotometer. The result showed that the emulsion stability test which produced the most stable emulsion was in the ratio of the membrane phase and the internal phase 1:1. In addition, the concentration of the HN03 solution resulted in a maximum extraction percentage of 1.5 M with an extraction percentage was 95.28%.

Analysis of Calsium (Ca) and Potassium (K) Levels in Candlenut Shells (Aleurites moluccana Willd) Megawati T. H. Romu; Siti Nuryanti; Siti Aminah
Jurnal Akademika Kimia Vol. 9 No. 1 (2020)
Publisher : Universitas Tadulako

Candlenut shell (Aleurites moluccana Willd) is a waste produced from processing candlenut plants with a fairly hard texture. The use of candlenut shells as fertilizer, especially in Central Sulawesi, has not been done so much. The aim of this study was to determine the levels of calcium (Ca) and potassium (K) in candlenut shells. Calcium and potassium levels were determined using an atomic absorption spectrophotometer (AAS). The results show that the average calcium level in the candlenut shell is 0.315 ± 0.09%, while the average potassium level is 0.090 ± 0.01%. The results of Ca and K in candlenut shell are expected to be used as raw material for fertilizer production.

Co-Authors A. Ma’ruf Afadil Agustin Tiwow Al Gifary, Muhammad Ali Amran Amran Rede Anang Wahid M.Diah Arun Haryanto Asmaul Husna B, Supriadi Baharuddin Hamzah Baharuddin Hamzah Barau, Fitri Chairil Anwar Chintia N. Barani Cynthia L. Radiman Daud Karel Walanda Dewi Satria Ahmar Dhamayanti, Noviasri Diniyanti, Diniyanti Edi Sukamto Ergina, Ergina Frantauansyah, Frantauansyah Hartarti Uminah I Made Tangkas Ijirana Indarini Dwi Pursitasari Indarini Dwi Puspitasari Irwan Irwan Jamaludin M Sakung Jeane Maria Mustika Tonahi Jusman Lapatta Karmila Karmila Kasmudin Mustapa Laksono Trisnantoro Lamalat, Tri Sulistiyawati Latupeirisa, Veronica Purnama Sari Lilik Suparwati Lis K. Djaledje Maâ€™ruf, Ahmad Magfirah Magfirah Male, Kasmir Sy. Marungkil Pasaribu Megawati T. H. Romu Mery Napitupulu Minarni R.J Minarni Rama Jura Mitha Widya Ningrum Moh. Azhar Afandy Muhamad A. Martoprawiro Muhammad Agus Muljanto Muhammad Silmi Hi Abubakar Nesia Andriana Nirwan Syafrin Nur A. O. Buhang Nur, Kurniati Nurbaeti Nurbaeti Nurdin Rahman Nurhasan, Abdul Kodir Nurmiati Nurmiati Nursucianti, Nursucianti Paulus H. Abram Pratiwi, Tia Putri Radiansah, Roy Rahmasita Rahmasita Rahmawati, Rahmawati Rasmun, Rasmun Ratman Ratman Ratman Ratman Robiansyah, Yal Sabirin Matsjeh Safna Nurfadila Sahida Sahida Saldi, Heri Salsabila, Unik Hanifah Setianingsih, Rahmadiana Siti Aminah Siti Nurbaya Sitti Rahmawati Sri Mulyani Sabang SRI RAHAYU Sri Wahyuni Sriyulaningsi Sriyulaningsi Sriyundiyati, Ni Putu Sudarmo, I Gede Suhardi Suhardi Suherman Suherman Suherman Suherman Sulhajir, Wahyuni Supriadi Supriadi Suwiyarsa, I Nyoman Tahril Tri Joko Raharjo U.B., Sitti Nadira Ubaidah, Nurcholis Al Winarti Winarti Yani Restiani Widjaja, Yani Restiani Yuli Nurmayanti Yuma Ardian Allu Yusuf Kendek Yusuf Kendek Yusuf Kendek

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