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All Journal Jurnal Bahan Alam Terbarukan Pharmascience Jurnal Kimia Riset Indonesian Journal of Chemistry JurTI (JURNAL TEKNOLOGI INFORMASI) SPIN: Jurnal Kimia & Pendidikan Kimia
Baiq Amelia Riyandari
Universitas Islam Negeri Mataram
Chemical Engineering, Chemistry & Bioengineering Chemistry Computer Science & IT Education Materials Science & Nanotechnology Medicine & Pharmacology

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Preparation of Polyelectrolyte Complex Films of Chitosan-Alginate Incorporated by Eugenol and its Potency as an Antioxidant Packaging Riyandari, Baiq Amelia
Jurnal Bahan Alam Terbarukan Vol 9, No 2 (2020): December 2020 [Nationally Accredited - Sinta 2]
Publisher : Universitas Negeri Semarang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.15294/jbat.v9i02.26146

Abstract

Preparation of PEC chitosan-alginate films incorporated by eugenol has been investigated. Incorporation of eugenol in chitosan-alginate films was conducted by using the different concentration of eugenol including 0.25% 0.5%, and 1% (% w/v). The effect of eugenol incorporation in chitosan-alginate films was investigated through some properties of the films such as tensile strength, elongation at break, transparency value, and water vapor permeability. Meanwhile, the effectiveness of eugenol incorporation as an active compound of the films was investigated from antioxidant activity of chitosan-alginate films incorporated eugenol. Polyelectrolyte complex (PEC) films of chitosan-alginate was occurred through molecular interaction between polycationic groups of chitosan and polyanionic groups of alginate. The formation of chitosan-alginate PEC films was synthesized at pH ± 4.0. Based on FTIR analysis, the ionic interaction between amine groups (–NH3+) and carboxylate groups (–COO¬) formed strongly. Characterization of films also indicated that PEC films of chitosan-alginate incorporated of eugenol was formed. Study showed that PEC chitosan-alginate films had good mechanical properties. Antioxidant activity assay through  fixed reaction time method  using DPPH radical (α,α-difenil-β- pikrilhidrazil) resulted in good percentage of radical scavenging activity (%RSA) from the films. The E3 films which contain 1% eugenol has 55.99% of  RSA value in 96 hours.
Potensi Tanaman Lokal sebagai Tanaman Obat dalam Menghambat Penyebaran COVID-19 Yuli Kusuma Dewi; Baiq Amelia Riyandari
Jurnal Pharmascience Vol 7, No 2 (2020): Jurnal Pharmascience
Publisher : Program Studi Farmasi FMIPA Universitas Lambung Mangkurat

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.20527/jps.v7i2.8793

Abstract

COVID-19 (Corona Virus Disease of 2019) merupakan wabah penyakit yang menginfeksi saluran pernafasan pada manusia. Wabah ini tidak hanya terjadi di Indonesia, melainkan terjadi hampir di seluruh negara di Dunia. COVID-19 ini menjadi wabah yang meresahkan karena penyebarannya terjadi dengan sangat cepat melalui kontak antara manusia dengan manusia dan hingga saat ini belum tersedianya vaksin terhadap virus SARS-CoV-2 yang telah diuji klinis untuk mengatasi penyebaran virus ini. Salah satu upaya untuk mencegah penyebaran COVID-19 adalah meningkatkan sistem kekebalan tubuh (sistem imunitas) melalui asupan makanan yang kaya akan kandungan senyawa antioksidan maupun imun booster. Berdasarkan studi literatur yang telah dilakukan, beberapa tanaman lokal Indonesia diprediksi dapat menjadi kandidat penghambat COVID-19. Tanaman yang memiliki potensi sebagai antiviral yang dapat menghambat COVID-19 antara lain: jahe merah (Zingiber officinale), kunyit (Curcuma longa L.), temulawak (Curcuma xanthorriza Roxb), teh hijau (Camelia sinensis), meniran (Phyllantus niruri L.), salam (Syzygium polyanthum), jambu biji (Psidium guajava), cengkeh (Sygizium aromaticum), dan bawang putih (Allium Sativum). COVID-19 (Corona Virus Disease of 2019) is one of disease infecting human respiratory system. This pandemic spreads out not only in Indonesia, but also in all countries around the world. In nowdays, COVID-19 become a terrible disease because the virus can infect very fast through human to human transmission and there is no clinically published vaccine against the SARS-CoV-2 virus to prevent the transmission. One of prevention methods of COVID-19 is by enhancing immune system. Consuming of some food which contain antioxidant agent or immune booster is known as one of method to enhance the immune system. Based on literature studies, there are some Indonesian local plants predicted as the inhibitor against COVID-19. Those plants which are potential as the antiviral to inhibit COVID-19 including red ginger (Zingiber officinale), turmeric (Curcuma longa L.), temulawak (Curcuma xanthorriza Roxb), green tea (Camelia sinensis), meniran (Phyllantus niruri L.), salam (Syzygium polyanthum), guava (Psidium guajava), clove (Sygizium aromaticum), dan garlic (Allium Sativum).Keywords: COVID-19, SARS-CoV-2, medicinal plants, antiviral
IMPLEMENTASI FUZZY C-MEANS UNTUK PENGELOMPOKAN DAERAH BERDASARKAN INDIKATOR KESEHATAN Gibran Satya Nugraha; Baiq Amelia Riyandari
(JurTI) Jurnal Teknologi Informasi Vol 4, No 1 (2020): JUNI 2020
Publisher : Universitas Asahan

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (551.407 KB) | DOI: 10.36294/jurti.v4i1.1222

Abstract

Abstract - The health of each individual is very dependent on the health of the family which then goes to a broader level, namely the village, then the district, province, and also the country. The equitable distribution of health quality at the national level must start from the province first. But this has become difficult because the Indonesian state is an archipelago and has a very large population. Nusa Tenggara Barat (NTB) is one of the provinces in Indonesia which has health problems, one of which is the spread of non-communicable diseases such as hypertension, diabetes mellitus, and mental disorders which are quite extensive and relatively difficult to control. Uneven health services are a major factor in non-communicable diseases which are quite difficult to control. The grouping of districts/cities in NTB is one alternative to improve the quality of health services. A fairly reliable data grouping algorithm is Fuzzy C-Means, the algorithm classifies data based on the characteristics of the data they have. The results obtained in this study are grouping data into a variety depending on the data of each parameter owned by the district/city. The number of iterations is also very dependent on the value of the center of the cluster that is determined in the first iteration.Keywords – Fuzzy Logic, Clustering, Health, Grouping Abstract - Kesehatan masing-masing individu sangat bergantung pada kesehatan keluarga yang kemudian beranjak ke tingkat yang lebih luas yaitu tingkat desa/kelurahan kemudian kabupaten, provinsi, dan juga negara. Pemerataan kualitas kesehatan pada tingkat nasional, harus dimulai dari provinsi terlebih dahulu. Namun hal ini menjadi sulit dilakukan karena negara Indonsia yang berbentuk kepulauan dan memiliki jumlah penduduk yang sangat banyak. Provinsi Nusa Tenggara Barat (NTB) merupakan salah satu provinsi di Indonesia yang memiliki permasalahan kesehatan salah satunya yaitu persebaran penyakit tidak menular seperti hipertensi, diabetes mellitus, dan gangguan jiwa menjadi cukup luas dan relatif sulit untuk dikendalikan. Pelayanan kesehatan yang belum merata menjadi faktor utama penyakit tidak menular tersebut cukup sulit untuk dikendalikan. Pengelompokan kabupaten/kota di NTB menjadi salah satu alternatif untuk pemerataan kualitas pelayanan kesehatan menjadi lebih baik. Algoritma pengelompokan data yang cukup handal adalah Fuzzy C-Means, algoritma tersebut mengelompokkan data berdasarkan karekteristik data yang mereka miliki. Hasil yang didapatkan dalam penelitian ini adalah pengelompokan data menjadi beraneka ragam tergantung dari data masing-masing parameter yang dimiliki oleh kabupaten/kota. Jumlah iterasi juga sangat bergantung pada nilai pusat cluster yang ditentukan pada iterasi pertama.Kata kunci - Logika Fuzzy, Clustering, Kesehatan, Kelompok
The Physico-Mechanical Properties and Release Kinetics of Eugenol in Chitosan-Alginate Polyelectrolyte Complex Films as Active Food Packaging Baiq Amelia Riyandari; Suherman Suherman; Dwi Siswanta
Indonesian Journal of Chemistry Vol 18, No 1 (2018)
Publisher : Universitas Gadjah Mada

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (379.652 KB) | DOI: 10.22146/ijc.26525

Abstract

A study of eugenol release and its kinetics model from chitosan-alginate polyelectrolyte complex (PEC) films has been conducted. Some factors that affected the eugenol release were also studied, including the composition of chitosan-alginate PEC and the concentration of eugenol. The chitosan-alginate-eugenol PEC films were synthesized at pH ± 4.0, then the PEC films were characterized using a Fourier-transform infrared spectroscopy (FTIR) spectrophotometer. An investigation of the films’ properties was also conducted, including morphology analysis using a scanning electron microscope (SEM), differential thermal analysis (DTA) / thermogravimetric analysis (TGA), mechanical strength, transparency testing, water absorption, and water vapor permeability. The release of eugenol was investigated through in vitro assay in ethanol 96% (v/v) for four days, and the concentration of eugenol was measured using an ultraviolet-visible (UV-Vis) spectrophotometer. The characterization of the films using FTIR showed that the formation of PEC occurred through ionic interaction between the amine groups (–NH3+)of the chitosan and the carboxylate groups (–COO–) of the alginate. The result showed that the composition of chitosan-alginate PEC and the concentration of eugenol can affect the release of eugenol from PEC films. A higher concentration of alginate and eugenol could increase the concentration of eugenol that was released from the films. The mechanism for the release of eugenol from chitosan-alginate PEC films followed the Korsmeyer-Peppas model with an n value of < 0.5, which means the release mechanism for eugenol was controlled by a Fickian diffusion process. The antioxidant activity assay of the films using the 2,2-diphenyl-1-picrylhydrazyl (DPPH) method resulted in a high radical scavenging activity (RSA) value of 55.99% in four days.
ANALISIS FAKTOR PENGHAMBAT PEMBELAJARAN ONLINE YANG DIHADAPI OLEH GURU IPA DAN PESERTA DIDIK PADA MASA PANDEMI COVID-19 DI MADRASAH ALIYAH PUTRI NURUL HAKIM: ANALYSIS OF CHALLENGES FACTORS OF ONLINE LEARNING FACED BY THE SCIENCE TEACHERS AND STUDENTS DURING THE COVID-19 PANDEMIC AT FEMALE’S NURUL HAKIM ISLAMIC BOARDING SCHOOL Hidayati Hidayati; Hadi Kusuma Ningrat; Baiq Amelia Riyandari
SPIN JURNAL KIMIA & PENDIDIKAN KIMIA Vol. 4 No. 1 (2022): Januari - Juni 2022
Publisher : UIN Mataram

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.20414/spin.v4i1.4733

Abstract

Penelitian ini bertujuan untuk menganalisis hambatan-hambatan yang dihadapi oleh guru IPA dan peserta didik di MA Dakwah Islamiyah Putri Nurul Hakim Kediri Kabupaten Lombok Barat, Nusa Tenggara Barat saat melaksanakan pembelajaran online di masa pandemi covid-19. Penelitian ini merupakan penelitian kuantitatif dengan metode survey. Metode pengumpulan data yang digunakan yaitu menggunakan kuisioner. Analisis data dilakukan menggunakan statistik deskriptif yaitu pengukuran tendensi sentral dan perhitungan persentase. Indikator yang digunakan dalam kuesioner ini meliputi 6 indikator yang terbagi menjadi 2 faktor yaitu faktor internal dan eksternal. Indikator pada faktor internal terdiri atas indikator kesehatan, inteligensi, minat, dan motivasi. Sedangkan indikator pada faktor eksternal meliputi indikator ekonomi dan sarana prasarana. Hasil dari penelitian ini menunjukkan bahwa guru IPA di Madrasah Aliyah Putri Nurul Hakim Kediri Kabupaten Lombok Barat mengalami hambatan tertinggi pada faktor internal yakni indikator motivasi sebesar 69.00% dan hambatan terendah ditemukan pada indikator sarana prasarana sebesar 63.33%. Pada peserta didik, hambatan tertinggi terdapat pada indikator intelegensi sebesar 74.80% dan hambatan terendah terdapat pada indikator sarana prasarana sebesar 65.43%.   ABSTRACT The aim of this research is to analysis some challenges faced by science teachers and students at MA Dakwah Islamiyah Putri Nurul Hakim Kediri, Kabupaten Lombok Barat, Nusa Tenggara Barat when students was doing online learning during the covid-19 pandemic. The type of this research is quantitative using survey method. The data collection method used was a questionnaire. For data analysis, the researcher used descriptive statistics, by calculating both central tendency and the percentages. There are indicators was used in this research. Indicators of internal factor consist of health, intelligence, interest, and motivation. Meanwhile, indicators of external factor consist of both economy and infrastructure. The results in this study indicated that the highest challenges percentage for science teachers was in the motivation indicator. It was 69.00%. Meanwhile, the lowest challenges percentage was on the infrastructure indicator as much as 63.33%. For students, the highest challenges percentage was on intelligence indicator (74,80%) and the lowest challenges percentage was on infrastructure indicator (65.43%).
SYNTHESIS OF POLYELECTROLYTE COMPLEX FILMS OF CHITOSAN-ALGINATE BY ADDITION OF KELOR LEAVES EXTRACT (Moringa oleifera) FOR FOOD PACKAGING Baiq Amelia Riyandari; Yupita Tri Rizki; M. Ramdani
Jurnal Kimia Riset Vol. 7 No. 2 (2022): December
Publisher : Universitas Airlangga, Campus C Mulyorejo, Surabaya, Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.20473/jkr.v7i2.28954

Abstract

This research aims to synthesize the polyelectrolyte complex (PEC) using chitosan and alginate as matrix film with the addition of kelor leaves extract (Moringa oleifera). The preparation of PEC films of chitosan-alginate by addition of kelor leaves extract (Moringa oleifera) had been implemented. The kelor leaves was prepared by drying process under the sun for removing water content and the dried kelor leaves was extracted using maceration technique. The final concentrations of film solution used in this study were 0.0% (Film E0), 0.50% (Film E1), 0.75% (Film E2), and 1.00% (Film E3). The PEC chitosan-alginate films with addition of kelor extract were prepared in room temperature (± 25 °C) and pH of film solution was ± 4.0. The result of film’s characterization using FTIR spectrophotometer showed that PEC films of chitosan-alginate were formed through the molecular interaction between chitosan which protonated into amine groups (–NH3+) and alginate which dissociated into carboxylate groups (–COO−). Based on FTIR spectrum, it also showed that there were some wavenumber shifts after addition of kelor leaves extract into PEC films of chitosan-alginate. It was confirmed that there were the changing of molecular interaction between PEC chitosan-alginate films due to presence of kelor extract, indicating that PEC chitosan-alginate films with kelor extract had been formed. Morphological analysis using a scanning electron microscope (SEM) displayed both porous and heterogeneous distribution on the surface after addition of kelor extract.
PENGARUH KOMBINASI METODE PEMBELAJARAN THINK PAIR SHARE DAN TAKE AND GIVE TERHADAP KEMAMPUAN BERKOMUNIKASI DAN HASIL BELAJAR KIMIA SISWA KELAS X SMAN 7 MATARAM: THE EFFECT OF THINK PAIR SHARE AND TAKE AND GIVE LEARNING METHODS COMBINATION ON COMMUNICATION ABILITY AND CHEMICAL LEARNING OUTCOMES OF CLASS X STUDENTS SMAN 7 MATARAM Nur Sa'baniyah; Raehanah Raehanah; Baiq Amelia Riyandari
SPIN JURNAL KIMIA & PENDIDIKAN KIMIA Vol. 4 No. 2 (2022): Juli - Desember 2022
Publisher : UIN Mataram

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.20414/spin.v4i2.5177

Abstract

Penelitian ini bertujuan untuk mengetahui pengaruh kombinasi metode pembelajaran think pair share dan take and give terhadap kemampuan berkomunikasi dan hasil belajar kimia siswa SMAN 7 Mataram. Jenis penelitian ini adalah quasi eksperimen dengan desain penelitian posttest control group design. Populasi dalam penelitian ini seluruh siswa kelas MIPA SMAN 7 Mataram. Pengambilan sampel dilakukan dengan teknik cluster sampling, dengan kelas X MIPA 3 sebagai kelas eksperimen dan X MIPA 4 sebagai kelas kontrol. Instrument berupa lembar observasi untuk kemampuan berkomunikasi dan lembar tes untuk hasil belajar. Berdasarkan hasil penelitian dapat disimpulkan bahwa a). nilai sig. 0,044 < 0,05 artinya ada perbedaan signifikan antara kemampuan berkomunikasi dan hasil belajar kimia dengan kombinasi metode pembelajaran think pair share dan take and give secara multivariate, b). Nilai sig. 0,017 < 0,05 artinya ada perbedaan signifikan terhadap kemampuan berkomunikasi yang diajarkan dengan kombinasi metode pembelajaran think pair share dan take and give pada siswa yang diajarkan dengan metode konvensional terhadap variabel kemampuan berkomunikasi, c). Nilai sig 0,162 > 0,05 artinya tidak ada perbedaan signifikan antara hasil belajar kimia yang diajarkan dengan kombinasi metode think pair share dan take and give dengan siswa yang diajarkan dengan metode konvensional terhadap variabel hasil belajar.
PENGARUH MODEL PEMBELAJARAN CREATIVE PROBLEM SOLVING TERHADAP KEMAMPUAN BERPIKIR KRITIS SISWA PADA MATERI ASAM BASA KELAS XI SMAN 2 LANGGUDU: THE EFFECT OF CREATIVE PROBLEM SOLVING LEARNING MODEL ON STUDENTS' CRITICAL THINKING ABILITY ON ACID-BASE MATERIALS IN CLASS XI SMAN 2 LANGGUDU Ainun Jariyah; Dwi Wahyudiati; Baiq Amelia Riyandari
SPIN JURNAL KIMIA & PENDIDIKAN KIMIA Vol. 4 No. 2 (2022): Juli - Desember 2022
Publisher : UIN Mataram

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.20414/spin.v4i2.5260

Abstract

Penelitian ini bertujuan untuk mengetahui pengaruh model pembelajaran creative problem solving (CPS) terhadap kemampuan berpikir kritis siswa pada materi asam basa kelas XI SMA Negeri 2 Langgudu Tahun Pelajaran 2021/2022. Desain penelitian yang digunakan adalah quasi eksperimen dengan bentuk desain nonequivalent control group design. Sampel penelitian berjumlah 23 siswa untuk kelas eksperimen yang menggunakan model Creative Problem Solving dan 22 siswa untuk kelas kontrol yang menggunakan model bervariasi. Pengambilan data menggunakan instrumen tes berupa tes kemampuan berpikir kritis yang berbentuk uraian yang telah diuji validitasnya. Berdasarkan pengujian hipotesis statistik dengan uji-t independent samples t-test diperoleh nilai signifikan (2-tailed) sebesar 0,020 < 0,05 dengan perbedaan nilai rata-rata pada post-test uji N-Gain kelas eksperimen sebesar 68,67 dan kelas kontrol sebesar 50,32. Hal ini menunjukkan bahwa terdapat pengaruh penerapan model pembelajaran creative problem solving (CPS) terhadap kemampuan berpikir kritis siswa pada materi asam basa kelas XI SMA Negeri 2 Langgudu Tahun pelajaran 2021/2022.
Co-Authors Ainun Jariyah Dwi Siswanta Dwi Wahyudiati Gibran Satya Nugraha Hadi Kusuma Ningrat Hidayati Hidayati M. Ramdani Nur Sa'baniyah Raehanah Raehanah Suherman, Suherman Yuli Kusuma Dewi Yupita Tri Rizki