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Jayadi
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Efektivitas Perkecambahan Kemiri dengan Metode Konvensional Jayadi; Irundu, Daud; Idris, Andi Irmayanti
Pangale Journal of Forestry and Environment Vol 2 No 1 (2022): Pangale
Publisher : Program Studi Kehutanan Fakultas Pertanian dan Kehutanan Universitas Sulawesi Barat

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31605/pangale.v2i1.1892

Abstract

Candlenut is a native plant of Indo-Malaysia and has been introduced to the pacific islands since ancient times. The constraint experienced by the community is the lack of seeds for candlenut cultivation, so this study aims to determine the effectiveness of water immersion and combustion treatments for candlenut seed germination and to obtain the most effective treatment in breaking the candlenut dormancy period. The method used in this research is the method of Randomized Block Design (RAK). The results obtained from this study were the combustion treatment was better than the hot water immersion treatment and the best was group III or large seeds.
Effect of Precursor Solvent on the Carbon Micro-Structures Derived from Spray Pyrolysis of Pine Resin (Gondorukem): Preliminary Study Jayadi; Widayatno, Wahyu Bambang; Wismogroho, Agus Sukarto; Firdharini, Cherly; Maddu, Akhiruddin; Alatas, Husin; Sari, Yessie Widya
Jurnal Sains Materi Indonesia Vol. 25 No. 2 (2024): Jurnal Sains dan Materi Indonesia
Publisher : BRIN Publishing (Penerbit BRIN)

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.55981/jsmi.2024.893

Abstract

Carbon materials have been widely used in various fields. This study aimed to produce carbon using spray pyrolysis with pine resin (gondorukem) as the precursor and different solvents, namely gondorukem-acetone (GAC), gondorukem-ethyl acetate (GEA), and gondorukem-dichloromethane (GDC). The precursor was prepared in a 1:8 (m/v) ratio, and the spray pyrolysis method was employed by heating the atomized precursor solution in the heating zone of a tube furnace. The atomization precursor was infused with nitrogen gas at a rate of 1 l/min with furnace temperature set at 1000°C with heating times of 5, 10, and 20 mins. The carbonaceous materials produced from the pyrolysis were collected on the wire mesh 1000 that was put on a stainless pipe. Carbon that has been coated on the wire mesh 1000 was analyzed using the optical microscope (OM). The physical properties and morphology of the synthesized carbonaceous material were analyzed using field emission scanning electron microscopy (FE-SEM), Fourier-transform infrared spectroscopy (FTIR), Raman, and Brunaur-Emmett-Teller (BET). Based on FE-SEM analysis, the particle size of the GAC sample has an average of 283.58 nm and the highest carbon content, which reached an average of 97.312 At%. GAC samples had the lowest disorder properties in the Raman spectroscopy test, with the value of ID/IG reaching 0.795764. The functional groups observed were C–H stretching at 2920.49 cm-1, N–H bending at 1629.07 cm-1, and C–O stretching at 1159.70 cm-1. Based on carbon content, disorder properties, and functional group stabilization, carbon from the GAC precursor provides the ideal characteristics to be used as a filter material in medical masks. Meanwhile, based on BET testing, the carbon materials from GEA have the ideal material morphological properties to be used as a filter in medical masks. Spray pyrolysis is an efficient method for producing carbon materials, and the use of gondorukem as the precursor shows great potential for various applications.
The Effects of L-Arginine Supplementation on Oxygen Saturation and Blood Lactic Acid on the Physical Fitness Level of Muaythai Athletes in West Kalimantan Bawana Mukti, Ibrah Fastabiqi; Jayadi; Heri Purnama Pribadi; Dhoni Akbar Ghozali; Agam Akhmad Syaukani; Muh. Isna Nurdin Wibisana; Herdianty Kusuma Handari
Journal of Physical Education Health and Sport Vol. 11 No. 2 (2024)
Publisher : Universitas Negeri Semarang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.15294/jpehs.v11i2.17298

Abstract

This study aims to determine the extent of the effect of L-Arginine amino acid supplementation on oxygen saturation and lactic acid levels at the fitness level (VO2Max) of West Kalimantan muaythai athletes. High lactic acid levels can be an indicator of fatigue in athletes after undergoing a physical fitness test. This type of quantitative descriptive research used a randomized group pretest-posttest group design sampling method. The subjects in the study used were male athletes on the West Kalimantan Muaythai team who will be prepared for the 2024 International Student Muaythai Championship. In this study, the subjects were divided into two groups, the first group was given a placebo and the second group was given the amino acid L-arginine. Each group was given the same treatment, namely a physical fitness test to determine the VO2Max level using a bleep test. Before and after carrying out the physical fitness test, the subjects were checked for oxygen saturation, and blood lactic acid samples were taken. The results showed that L-Arginine supplementation had a positive effect in helping to maintain optimal oxygen saturation in the body and reducing the accumulation of blood lactic acid levels that can cause fatigue in Muay Thai athletes. This shows the significant role of L-arginine supplementation in helping to enhance physical endurance performance and speed up recovery during and after physical activity.
Co-Authors Adriza Agam Akhmad Syaukani, Agam Akhmad Agung Rachmat Raharja Agus Sukarto Wismogroho, Agus Sukarto Aichah Fadlina Ramadanty Yusuf Akhiruddin Maddu Andi Wulansari Angga Pramudianto Asep Supena. Bawana Mukti, Ibrah Fastabiqi Budiandriani, Budiandriani Dani Nurcholis Dhoni Akbar Ghozali Dola Ramalinda Don Jaya Putra Ferianto Firdharini, Cherly Handaya, Setia Herdianty Kusuma Handari HERI PURNAMA PRIBADI Husin Alatas Indri Astuti Irundu, Daud Lathifah Sandra Devi Mahfudnurnajamuddin Muchsam, Yoki Muh. Isna Nurdin Wibisana Nisa, Maulidatun Parman Ramadani. H, Nur Fadliah Ranti Selong, Abbas Setiawati Setiawati Siskariyanti Siti Helmyati Su'un, Muhammad Suliwa Suyanto Tori Sutisna Wahyu Bambang Widayatno, Wahyu Bambang Wila, Gustri Yessie Widya Sari Yuni Pratikno Zamjam Ginanjar