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Tri Martini
Jurusan Kimia Fakultas MIPA Universitas Sebelas Maret, Jl. Ir. Sutami 36ª, Kentingan Surakarta 57126
Agriculture, Biological Sciences & Forestry Biochemistry, Genetics & Molecular Biology Chemical Engineering, Chemistry & Bioengineering Chemistry Economics, Econometrics & Finance Education Energy Engineering Environmental Science Materials Science & Nanotechnology Medicine & Pharmacology Public Health Social Sciences Other

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SINTESIS KITOSAN-ARGININ DENGAN KATALIS PIRIDIN DAN UJI AKTIVITAS ANTIBAKTERI TERHADAP Escherichia coli Purnawan, Candra; Purwanto, Purwanto; Martini, Tri; Kusumaningtyas, Triana; Ambarrukmi, Asnani Ratna
Indonesian Journal of Chemical Science Vol 3 No 2 (2014)
Publisher : Indonesian Journal of Chemical Science

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

Abstract

Telah dilakukan penelitian tentang sintesis kitosan-arginin dengan katalis piridin dan uji aktivitas antibakteri terhadap Escherichia coli. Tujuan penelitian ini adalah mempelajari pengaruh penambahan massa arginin pada kitosan dan variasi suhu reaksi dalam sintesis kitosan-arginin terhadap aktivitas antibakteri Escherichia coli serta membandingkan kitosan dan kitosan-arginin terhadap aktivitas antibakteri Escherichia coli. Sintesis kitosan-arginin dilakukan dengan perbandingan massa (b/b) kitosan:arginin 1:0,5; 1:1; 1:1,25; 1:1,5; 1:2 dan variasi suhu reaksi 60 °C, 80 °C, 100 °C menggunakan katalis piridin untuk mengaktifkan gugus karbonil arginin. Karakterisasi kitosan-arginin meliputi Spektroskopi Sinar Merah (FT-IR), Analisis Termal (TGA-DTA) dan % Nitrogen dengan metode Kjeldahl. Uji aktivitas antibakteri menggunakan metode Optical Density (OD) λmaks 600 nm pada jam ke-0, 3, 6, 9, 12, 24 dan 48. Hasil penelitian menunjukkan bahwa penambahan massa arginin dan variasi suhu reaksi sintesis kitosan-arginin tidak menunjukkan perbedaan signifikan terhadap daya hambat bakteri. Namun ketika aktivitas antibakteri kitosan jam ke-48 menurun, aktivitas antibakteri kitosan:arginin 1:1,5 pada 80 ᵒC masih meningkat.
Molecular study in G6PD deficiency, a pedigree analysis af Javanese-Chinese family in Surabaya, Indonesia Suhartati, Suhartati; Martini, Tri; Soewono, Imam; Shirakawa, Thaku; Nishiyama, Kaoru
Jurnal Kedokteran YARSI Vol 10, No 1 (2002): JANUARI - APRIL 2002
Publisher : Lembaga Penelitian Universitas YARSI

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33476/jky.v10i1.69

Abstract

Pengaruh Pemberian Jus Tomat (Solanum lycopersicum L.) terhadap Kadar Kolesterol LDL Tikus Putih (Rattus norvegicus) Jantan Galur Wistar yang Diinduksi Aloksan Husna, Leny Alimatul; Djoko, Louis; Handajani, Fitri; Martini, Tri
Jurnal Ilmiah Kedokteran Wijaya Kusuma Vol 8, No 1 (2019): EDISI MARET 2019 (available online since April 2019)
Publisher : Universitas Wijaya Kusuma Surabaya

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (331.363 KB) | DOI: 10.30742/jikw.v8i1.546

Abstract

Hiperkolesterolemia merupakan faktor resiko terjadinya gangguan kardiovaskuler pada diabetes mellitus. Pada diabetes mellitus kekurangan insulin meningkatkan lipolisis sehingga asam lemak bebas meningkat sehingga meningkatan kadar kolesterol total dan kolesterol LDL. Tomat mengandung likopen yang dapat menurunkan kadar kolesterol LDL karena mampu menghambat HMG-KoA reduktase. Penelitian ini untuk mengetahui pengaruh pemberian jus tomat (Solanum lycopersicum L.) terhadap kadar kolesterol total dan LDL tikus putih (Rattus norvegicus) jantan galur wistar yang diinduksi aloksan.  24 ekor yang dibagi menjadi 3 kelompok: 1). Kelompok kontrol negatif tanpa perlakuan 2). Kelompok kontrol positif hewan coba yang diinduksi aloksan 3). Kelompok perlakuan yang diinduksi aloksan dan diberi jus tomat dengan dosis 11 gram/KgBB selama 14 hari. Uji One-Way Annova menunjukkan peningkatan kadar kolesterol LDL yang signifikan antara kelompok kontrol positif dan kelompok hewan kontrol negatifnamun tidak pada kadar total kolesterol. Rerata kadar total kolesterol dan LDL pada kelompok perlakuan menunjukkan penurunan yang tidak signifikan di bandingkan kelompok hewan coba yang diinduksi aloksan. Pemberian aloksan dengan dosis 150 mg/Kg BB dapat meningkatkan kadar kolesterol LDL secarabermakna namun tidak pada kadar total kolesterol. Pemberian jus tomat dengan dosis 11 gram/KgBB cenderung menurunkan rerata kadar total kolesterol dan LDL.
Upaya Peningkatan Kreativitas Melukis dengan Media Karet Gelang pada Anak Kelompok B TK Kemala Bhayangkari 70 Masaran Martini, Tri
Didaktika Vol 3, No 1 (2023): Didaktika
Publisher : Universitas Pendidikan Indonesia Kampus Serang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.17509/didaktika.v3i1.57224

Abstract

Activities at Kemala Bhayangkari 70 Masaran Kindergarten still used conventional painting media using crayons. Initial observations show that learning activities are less attractive to children, activities are less varied monotonous, and learning is more often carried out in the classroom so that the space for children to move is less free, resulting in creativity that does not look optimal. Rubber bands have the potential to become a medium for children's painting activities in kindergarten because children often find them and are often used by children to play. This classroom action research was carried out at Kemala Bhayangkari 70 Masaran Kindergarten in the Odd Semester of the 2022/2023 Academic Year with the research subject being group B students with a total of 31 children consisting of 16 boys and 15 girls. In this research, the independent variable is creativity in painting with indicators of fluency, authenticity, detail, neatness, harmony. The data collection methods used are observation and documentation. After the researcher held the first cycle by applying the rubber band media, it was obtained that in the first cycle, it increased by 71.67% with the criteria of Developing as Expected (BSH). But the results obtained have not been maximized because they have not reached the mutually agreed success indicator of 80%. For this reason, researchers and collaborating partners held cycle II, with the same learning and activities with a variety of varied color choices. The results achieved in research in cycle II the average percentage of children in 1 class was 84.73% with the Very Well Developed (BSB) assessment criteria. The data shows that children's creativity has increased, for this reason, researchers have succeeded and achieved mutually agreed indicators and it is proven that painting with rubber band media can increase the creativity of Kemala Bhayangkari 70 Kindergarten children  Masaran
Pengaruh Model Pembelajaran Cooperative dalam Meningkatkan Hasil Belajar Guling Depan dan Guling Belakang Fitriani, Tika; Salman, Salman; Martini, Tri; Hidayat, Teten; Firmansyah, Helmy
Pubmedia Jurnal Pendidikan Olahraga Vol. 2 No. 1 (2024): September
Publisher : Indonesian Journal Publisher

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.47134/jpo.v2i1.572

Abstract

Dalam pembelajaran pendidikan jasmani, model pembelajaran yang digunakan oleh guru sangat bervariatif. Model pembelajaran yang digunakan guru tentu saja sangat mempunyai pengaruh terhadap hasil belajar siswa. Terdapat satu model yang dikaji dalam penelitiann ini yaitu model pembelajaran kooperatif khususnya pada materi senam lantai. Metode yang digunakan dalam penelitian ini menggunakan studi pustaka dengan upaya pengumpulan dan upaya analisis data manfaatkan berbagai literatur meliputi jurnal dan ekonomi buku, artikel serta sumber lain termasuk foto dan dokumen yang sifatnya elektronik. Analisis kritis terhadap bahan pustaka menyajikan bahwa terkait model pembelajaran kooperatif memberikan keefektifan dalam usaha ditingkatkannya hasil belajar peserta didik dalam gerakan guling depan dan guling belakang. Pendekatan ini mendorong kerjasama antar siswa, memungkinkan mereka untuk belajar dan berinteraksi secara lebih aktif. Hasil penelitian mengungkapkan bahwa penggunaan model ini meningkatkan aktivitas belajar, hasil evaluasi, dan keterampilan sosial siswa. Siswa yang terlibat menunjukkan peningkatan kepercayaan diri, kemampuan berkomunikasi, dan minat belajar. Model pembelajaran kooperatif memberikan peran aktif kepada siswa dan mengurangi ketergantungan pada guru, secara signifikan meningkatkan kualitas pembelajaran Penjasorkes, membuat proses belajar lebih dinamis dan efektif dalam mencapai tujuan pendidikan secara sekeluruhan.
Rice husk ash-based selective absorbent with imprinted ionic for gold recovery Hastuti, Sri; Fajariani, Ema N.; Candraningrum, Intan K.; Martini, Tri; Wahyuningsih, Sayekti; Aini, Fitri N.
Communications in Science and Technology Vol 9 No 2 (2024)
Publisher : Komunitas Ilmuwan dan Profesional Muslim Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21924/cst.9.2.2024.1461

Abstract

The recovery of gold from aqueous solutions is crucial due to its economic value and environmental significance, making effective separation technologies essential. To tackle this challenge, development of an adsorbent with enhanced selectivity and high adsorption capacity against Au(III) is highly crucial. This present study harnessed rice husk derived-silica functionalized by (3-trimethoxysilyl)propyldiethylenetriamine (TMPDT) using imprinted ionic method to form SiO2-TMPDT-Au-Imp, specifically designed for the selective adsorption of Au(III). SiO2-TMPDT-Au-Imp demonstrated a significantly higher adsorption capacity about 387% improvement compared to SiO2-TMPDT, highlighting its superior performance. Furthermore, in addition to exhibit several advantageous characteristics that surpass those of other materials tested, underscoring its effectiveness in Au(III) adsorption. SiO2-TMPDT-Au-Imp displayed notable selectivity in competitive metal ion solutions with the preference order of Au(III)/Fe(III) < Au(III)/Cu(II) < Au(III)/Zn(II). The developed SiO2-TMPDT-Au-Imp, in brief, represents a promising advancement in the field of material science and environmental remediation in which it offers a tailored solution for efficient and selective adsorption of Au(III). This study can also be applied for the recovery of Au(III) ions from electronic waste.
A study of universal values of sports in high schools based on ethnicity Ali, Burhan; Gumilar, Agus; Martini, Tri
Jurnal Patriot Vol 6 No 4 (2024): Jurnal Patriot
Publisher : Department of Coaching, Faculty of Sports Science, Universitas Negeri Padang, Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24036/patriot.v6i4.1113

Abstract

Problems: Sports in high school are not just physical exercise; they also teach values that will shape students' behavior and personalities in the future. Sports shape one's character and ethics significantly through teaching universal values such as discipline, sportsmanship, honesty, and teamwork. Due to its diverse ethnic population, Indonesia faces its own difficulties in incorporating the universal values of sports into its education system. Purpose: Therefore, it is important to conduct research on the universal values of sports at the high school level from an ethnic perspective to understand the socio-cultural dynamics that occur in Indonesia. Methods: The research instrument used was a questionnaire. The study involved 261 high school student respondents, consisting of 97 Lampung ethnicities and 164 non-Lampung ethnicities, aged between 14 and 18 years. The instrument was to measure the universal values of sport, which consisted of six assessed components. Results: Analysis of the Mann-Whitney u test showed that the sig (2-tailed) value of 0.325 was greater than 0.05, indicating that there was no significant difference in the distribution of universal sports values between the two ethnic groups Lampung and Non-Lampung. Conclusion: Following up on the findings of this study, diverse cultural perspectives are essential for educational programs and approaches objectives, methods, and research results.
Pengetahuan Guru Pendidikan Jasmani Tentang Pola Gerak Dominan Senam Terhadap Partisipasi Siswa pada Materi Senam Lantai Martini, Tri; Winarni, Sri; Mulyaningsih, Farida
Gelanggang Olahraga: Jurnal Pendidikan Jasmani dan Olahraga (JPJO) Vol 8 No 2 (2025): Gelanggang Olahraga: Jurnal Pendidikan Jasmani dan Olahraga
Publisher : Institut Penelitian Matematika, Komputer, Keperawatan, Pendidikan dan Ekonomi (IPM2KPE)

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31539/jpjo.v8i2.13487

Abstract

This study aims to determine the level of knowledge of junior high school physical education teachers in West Java regarding dominant movement patterns (PGD) in gymnastics and the level of student participation in learning with floor exercise material. The research was conducted through a quantitative descriptive approach. Participants in this research consisted of 45 physical education teachers who were respondents from 15 schools throughout West Java and 287 students of SMPN 10 Cirebon City in grades VII and VIII. The instrument used was a questionnaire. The technical data analysis used is descriptive quantitative, with the results of assessments of all teachers and students carried out using the same tool. The results are divided into five categories: high, high, medium, low, and low. Based on the research results, the level of knowledge of Physical Education Teachers regarding Dominant Movement Patterns (PGD) in gymnastics is high, with a total of 22 teachers (42.3%). In comparison, the lowest are teachers with very low knowledge, with four teachers (7.7%). For student participation in the floor exercise material, most students had low participation, with a total of 136 students (47.4%). In comparison, 60 students (20.9%) were students with the highest involvement, and the fewest were students with very low participation, with a total of 19 students (6.6%). Keywords: Teacher knowledge, dominant movement patterns in gymnastics, floor exercise, student participation
Universal values of sport in senior high school: A comparative study between rural and urban areas Ali, Burhan; Gumilar, Agus; Martini, Tri; Ma'mun, Amung; Syarifatunnisa, Syarifatunnisa
Jurnal Patriot Vol 7 No 1 (2025): Jurnal Patriot
Publisher : Department of Coaching, Faculty of Sports Science, Universitas Negeri Padang, Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24036/patriot.v7i1.1127

Abstract

Problems: There are significant disparities in access to sports facilities, physical education teacher qualifications, and extracurricular programs between rural and urban schools. Purpose: The purpose of this study is to compare the universal values of sports between students from rural areas and students from urban areas in senior high school. Methods: Quantitative descriptive was used in this research with the survey method. This research was conducted using questionnaires as instruments. The study involved 151 high school student respondents; there were 71 students from rural areas and 80 students from urban areas, aged between 14-18 years old. The instrument in this study has 6 indicators and 73 question items, including problem solving, communication, teamwork, discipline, leadership, and fair play, which aims to assess the understanding of universal sports values among senior high school students. Results: The data collected was analyzed using an independent sample t-test with SPSS. The results showed the value of Sig. (2-tailed) > 0.05, meaning that there is no significant difference in the distribution of understanding of values between groups of students from rural and urban areas. Seen in the mean value of rural areas, 451.48, and the mean value of urban areas, 446.63. Conclusion: To follow up on the findings in this study, it is expected to take a larger and more diverse sample to get a more comprehensive picture of the influence of the environment on universal sports values.
PENGARUH JARAK TANAM DAN PUPUK ANORGANIK TERHADAP BIOMASA, KLOROFIL, DAN KADAR AIR RELATIF DAUN BAWANG MERAH FASE VEGETATIF Rajiman, Rajiman; Megawati, Sari; Anshori, Arif; Martini, Tri
Agros Journal of Agriculture Science Vol 26, No 1 (2024): Januari
Publisher : Fakultas Pertanian, Universitas Janabadra

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.37159/jpa.v26i1.3954

Abstract

The aim of this study was to study the effect of plant spacing and variations of inorganic fertilizers on the biomass, chlorophyll, and relative moisture content of shallots in the vegetative growth phase. The research was conducted in May–June 2023 in Plembuatan Village, Playen District, Gunungkidul Regency, D.I. Yogyakarta. The study used a Complete Factorial Randomized Block Design with 3 replications. The first factor is the spacing (J), consisting of: J1 = 10x10 cm2, J2 = 10x15 cm2, J3 = 10x20 cm2, and J4 = 15x15 cm2. The second factor is the variation of inorganic fertilizers consisting of: N1 = basic fertilize of NPK Phonska r 250 kg/ha, SP-36 150 kg/ha, follow-up I and II NPK Phonska 75 kg/ha, N2 = basic fertilizer of NPK Phonska 250 kg/ha, SP -36 150 kg/ha, follow-up I and II urea 25 kg/ha, N3 = basic fertilizer of NPK Phonska 400 kg/ha, SP-36 150 kg/ha, follow-up I and II urea 25 kg/ha, and N4 = basic fertilizer of NPK phonska 250 kg/ha, SP-36 150 kg/ha, follow-up I and II urea 25 kg/ha and KCl 18.75 kg/ha. The results showed that the spacing treatment and fertilizer variation significantly interacted with the parameters of plant height, number of leaves, oven dry weight per clump, chlorophyll a content, chlorophyll b content, total chlorophyll content and relative moisture content of leaf aged 4 WAP, but did not significantly interact with fresh weight per clump. The increase in plant spacing and variations in inorganic fertilizers did not significantly affect plant height, number of leaves and wet weight per clump. Keywords: Biomass, Chlorophyll, and Inorganic Fertilizers INTISARIPenelitian bertujuan mengetahui pengaruh jarak tanam dan variasi pupuk anorganik terhadap biomasa, klorofil, dan kadar air relatif daun bawang merah pada fase pertumbuhan vegetatif. Penelitian dilaksanakan bulan Mei–Juni 2023 di Desa Plembuatan, Kapanewon Playen, Kabupaten Gunungkidul, Provinsi D.I. Yogyakarta. Penelitian menggunakan Rancangan Acak Kelompok Lengkap Faktorial dengan 3 ulangan. Faktor pertama jarak tanam (J), terdiri : J1 = 10x10 cm2, J2 = 10x15 cm2, J3 =10x20 cm2, dan J4 = 15x15 cm2. Faktor kedua  variasi pupuk anorganik terdiri : N1 =  Pupuk dasar NPK phonska 250 kg/ha, SP-36 150 kg/ha, susulan I dan II  NPK Phonska 75 kg/ha, N2 =  Pupuk dasar NPK phonska 250 kg/ha, SP-36 150 kg/ha,  susulan I dan II   urea 25 kg/ha, N3 =  Pupuk dasar NPK phonska 400 kg/ha, SP-36 150 kg/ha, susulan I dan II  urea 25 kg/ha,  dan N4 =  Pupuk dasar NPK phonska 250 kg/ha, SP-36 150 kg/ha, susulan I dan II urea 25 kg/ha dan KCl 18,75 kg/ha. Hasil penelitian menghasilkan perlakuan jarak tanam dan variasi pupuk nyata berinteraksi terhadap parameter tinggi tanaman, jumlah daun, bobot kering oven per rumpun, kandungan klorofil a, kandungan klorofil b, kandungan klorofil total dan kadar air relatif daun bawang umur 4 MST, tetapi tidak nyata berinteraksi terhadap bobot basah per rumpun. Peningkatan jarak tanam maupun variasi pupuk anorganik tidak nyata mempengaruhi tinggi tanaman, jumlah daun dan bobot basah per rumpun. Kata Kunci : Biomasa, Klorofil, dan Pupuk Anorganik.
Co-Authors Abu Masykur Aini, Fitri N. Ali, Burhan Arif Anshori, Arif Asnani Ratna Ambarrukmi, Asnani Ratna Atmanto Heru Wibowo Budiana, Dian Candra Purnawan Candraningrum, Intan K. Djoko, Louis Edi Pramono Fajariani, Ema N. Farida Mulyaningsih Fitriani, Tika Gumilang, Eva Sri Gumilar, Agus HANDAJANI, FITRI Helmy Firmansyah Husaini Husaini Husna, Leny Alimatul Imam Soewono Kaoru Nishiyama Kartika Setia Rini, Kartika Setia Ma'mun, Amung Maharditya, Winda Megawati, Sari Ngabekti Ngabekti, Ngabekti Novita Sari Okstafiyanti, Lestari Pranoto Pranoto Purwanto Purwanto Rajiman Rajiman Salman Salman Sayekti Wahyuningsih Sentot Budi Rahardjo Shirakawa, Thaku Shofiatul Afidah, Shofiatul Solly Aryza Sotya Rawiningtyas, Sotya Sri Winarni Suhartati Suhartati Syarifatunnisa Syarifatunnisa Teten Hidayat, Teten Thita Haryati, Thita Triana Kusumaningsih Triana Kusumaningtyas, Triana Weny Pudiastuti, Weny Zidny Z.S.R.A. Zidny, Zidny Z.S.R.A.