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Jurnal Natural Scientiae
Published by Universitas Lambung Mangkurat
ISSN : -     EISSN : 28099796     DOI : DOI: https://doi.org/10.20527/jns.v2i1
Core Subject : Science, Engineering,
Biochemistry, Genetics & Molecular Biology Chemical Engineering, Chemistry & Bioengineering Earth & Planetary Sciences Energy Immunology & microbiology Materials Science & Nanotechnology Physics
Jurnal Natural Scientiae (JNS), ISSN:2809-9796 (online) adalah sebuah jurnal blind peer review yang didedikasikan untuk publikasi hasil penelitian yang berkualitas dalam bidang IPA namun tak terbatas secara implisit. Semua publikasi di jurnal Natural Scientiae bersifat akses terbuka yang memungkinkan artikel tersedia secara bebas online tanpa berlangganan apapun. Jurnal Natural Scientiae dikelola secara profesional dan diterbitkan oleh FMIPA ULM dalam membantu mahasiswa, akademisi, peneliti dan praktisi untuk menyebarkan hasil penelitiannya. Jurnal Natural Scientiae merupakan media publikasi yang sangat peduli terhadap perkembangan dan inovasi-inovasi pada bidang IPA terutama bidang biologi, kimia dan fisika Indonesia. Focus and Scope: Biosistematika tumbuhan Biosistematikan Hewan Genetika Molekuler Mikrobiologi Ekologi Fisika Instrumentasi Fisika Material Geofisika Kimia Analitik Kimia Organik Kimia Anorganik Biokimia Kimia Fisik Kimia Lingkungan Kimia Komputasi Biomaterial
Arjuna Subject : Umum - Umum
Articles 35 Documents
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Profil Petani Pembudidaya Talas (Araceae ) di Desa Karang Intan Kabupaten Banjar, Kalimantan Selatan Herlin Mardiana; Anang Kadarsah; Erma Agusliani
Jurnal Natural Scientiae Vol 3, No 2 (2023): November 2023
Publisher : Universitas Lambung Mangkurat

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.20527/jns.v3i2.10861

Abstract

This study aims to analyze the density and distribution of the taro plant and to obtain information about the knowledge of the local population on the cultivation technique of taro (Colocasia esculenta L. Shoot) in Karang Intan Village, Banjar Regency, South Kalimantan. Taro cultivators was carried out by interview method with 10% of respondents. The interview were made a comparison percentage and discussed descriptively. The results showed that the taro cultivators are dominated by women (56.25%) and the rest 43.75% are men. Respondents majority were from the age group 41-50 years (43.75%) and the lowest (12.5%) was from the age group 21-30 and 31-40 years. Farmers are the most occupied livelihood (75%) and the rest are fish farmers (25%). Taro cultivators in Karang Intan Village still apply simple cultivation techniques and local wisdom that are hereditary. Key words: Taro, farmer, knowledge
Karakteristik Akuistik Interior Ruangan Menggunakan Metode Elemen Batas Jamiatur rasyidah; Tetti Novalina Manik; Nurma Sari
Jurnal Natural Scientiae Vol 3, No 1 (2023)
Publisher : Universitas Lambung Mangkurat

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.20527/jns.v3i1.8750

Abstract

Telah dilakukan penelitian penentuan karakteristik akustik interior ruangan menggunakan Metode Elemen Batas (Boudary Element Method, BEM). Model ruang/ objek yang digunakan berbentuk persegi berukuran 18 m x 8 m x 3,5 m dengan asumsi permukaan rigid (keras). Ruang objek didiskritisasi menjadi 56 elemen dan 170 node. BEM merupakan salah satu metode untuk menyelesaikan masalah-masalah numerik. BEM memiliki keunggulan utama yaitu hanya permukaan sumber akustik yang didiskritisasi sehingga mengurangi dimensi persoalan yang dipecahkan, menghemat waktu komputasi dan akurasi yang lebih baik. Penelitian ini bertujuan menentukan karakteristik akustik dalam domain interior yaitu tekanan akustik dan kecepatan potensial yang kemudian divisualisasikan menggunakan software MATLAB. Ada empat kasus yang akan diuji yaitu, pertama semua sumber suara ada pada permukaan ruangan, kedua sumber suara berasal dari dua buah loudspeaker, ketiga sumber suara berasal dari satu buah loudspeaker dan keempat sumber suara berasal dari dua buah loudspeaker dengan dua buah bidang permukaan diberi bahan penyerap. Hasilnya menunjukkan nilai minimum dan maksimum tekanan pada titik medan (field point) kasus pertama, kedua, ketiga dan keempat masing-masing adalah 31,768 Pa dan 1664,600 Pa; 0,019 Pa dan 1,278 Pa; 0,018 Pa dan 1,742 Pa; 0,028 Pa dan 1,283 Pa. Waktu dengung yang diperlukan pada kasus pertama, kedua, ketiga dan keempat berturut-turut adalah 1,06 detik, 1,25 detik, 1,27 detik dan 0,7 detik. Waktu dengung pada kasus keempat lebih kecil dibandingkan pada kasus kedua dengan selisih 0,55 detik (sama-sama diberi perlakuan yang sama akan tetapi pada kasus keempat diberi bahan penyerap). Hal ini memperlihatkan bahwa dua buah sumber bunyi dengan kekuatan sama dapat menyebabkan waktu dengung yang berbeda bila bahan permukaan ruangan diganti dengan bahan yang mempunyai koefisien serapan tertentu. Selain itu, didapatkan pengurangan kebisingan pada kasus keempat sebesar 2,5 dB.
Kajian Potensi Tumbuhan Nipah (Nypa fruticans Wurmb.) di Desa Tabanio Kabupaten Tanah Laut Jumidah Jumidah; Anang Kadarsah; Sasi Gendro Sari
Jurnal Natural Scientiae Vol 1, No 1 (2021): November 2021
Publisher : Universitas Lambung Mangkurat

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.20527/jns.v1i1.4424

Abstract

Nipah or Nypa fruticans (Thunb.) Wurmb is a member of the palmae tribe that lives along the river coast grouped in a mangrove forest ecosystem that is influenced by tides. Currently Nipah is used as a source of livelihood for the people of Tabanio Village, Tanah Laut Regency. This study aims to find out information about the potential of stands, the parts of the plant that are used and to study the potential of Nipah plants. This type of research is observative on the Nipah plant. The method used to explore the various potentials of Nipah leaves is done by taking an inventory of the presence of nipah plant stands using the plot sampling method with the compartmental path technique. Furthermore, measurements of plant parts were carried out according to the criteria used, in each plot 3 plant samples were taken. Meanwhile, to explain the use of Nipah leaves by the people of Tabanio Village, data was collected using interviews through questionnaires. Based on the results of this study, the total density of nipah plants was 1,231.3 ind / ha with a plant height of 10.4 m. 
Identifikasi Karakteristik Mineral Magnetik Berdasarkan Analisis XRF di Lahan Pertanian Sekitar Sungai Biyonga Kabupaten Gorontalo Gani, Sintia N.; Yunginger, Raghel; Tamuntuan, Gerald H; Demulawa, Meilan
Jurnal Natural Scientiae Vol 3, No 2 (2023): November 2023
Publisher : Universitas Lambung Mangkurat

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.20527/jns.v3i2.9857

Abstract

An analysis of soil chemical elements using X-Ray Fluorescence (XRF) has been conducted on paddy fields in Dutulanaa Village, Gorontalo Regency, and corn farms in Polohungo Village, Gorontalo Regency. Soil samples were taken at three locations, namely corn location 1 (location I), corn location 2 (location II), and paddy fields (location III). At each location, samples were taken at 2 points to obtain 6 pieces. The distance between sampling points is 10 m. Based on the results of XRF measurements, the elements that dominate in paddy fields and corn include silica (Si), iron (Fe), aluminum (Al), calcium (Ca), titanium (Ti), potassium (K), and manganese (Mn), where Si is a diamagnetic element, Fe is a ferromagnetic element, and Al, Ca, Ti, and K are paramagnetic elements. The most significant percentage is silica (Si), 60.27% in corn soil 2 points J2T2. The next highest element is iron (Fe), 29.47% in corn soil, 1 point J1T2. The next element is aluminum (Al), 9.10% in corn soil at 1 point J1T1, calcium (Ca) in corn soil at 2 points J2T2 is 10.03 %, titanium (Ti) was 2.31% in paddy fields at ST5 point and potassium (K) was 2.31% in a paddy field at ST5 point, and the lowest value was manganese (Mn) of 0.59% in corn soil 2 points J2T1. Even some heavy metal elements, such as lead (Pb), were found—zinc (Zn) and manganese (Mn). The highest heavy metal elements were found in agricultural corn land at 2 J2T2 points, namely lead (Pb) at 158 ppm, zinc (Zn) at 4,555 ppm, and manganese (Mn) at 17,100 ppm, where these results have exceeded the threshold of soil quality standards, resulting in environmental pollution of agricultural land.
Uji Kemampuan Adsorpsi Komposit Keratin Bulu Itik-Polietilena Terhadap Ion Besi(III) Oktavia Hesti Fauzy; Uripto Trisno Santoso; Umi Baroroh Lili Utami
Jurnal Natural Scientiae Vol 2, No 2 (2022): November 2022
Publisher : Universitas Lambung Mangkurat

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.20527/jns.v2i2.6624

Abstract

Research on the adsorption of iron(III) ion using an adsorbent from duck feather-polyethylene composite has been studied. This study aimed to determine the optimum pH conditions and the optimum contact time required in the iron(III) ion adsorption process. Optimum pH and contact time are then measured using AAS to determine the amount of iron(III) ion adsorbed with the duck feather-polyethylene composite adsorbent. The determination of the optimum pH was carried out with pH variations which are 2, 3, 4, 5, 6, 7, and 8, while determination of the optimum contact time was carried out with contact time variations which are 40, 60, 80, 100, 120, 140, and 160 minutes. The result of this research showed that optimum conditions for iron(III) ion adsorption at pH 6 and contact time at 80 minutes, which each adsorption capacity are 68.33% and 79.78%.
Pemodelan Calponin Ikan Gabus (Channa striata) dengan Phyre2 dan Interaksi dengan Protein Lain Mirza Maulana Ahmad; Noer Komari
Jurnal Natural Scientiae Vol 2, No 1 (2022): Mei 2022
Publisher : Universitas Lambung Mangkurat

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.20527/jns.v2i1.4790

Abstract

Knowledge of the three-dimensional structure of proteins is very important to understand their character and function at the molecular level. Determination of protein structure in the laboratory is expensive and relatively difficult because it requires sophisticated instruments and takes a long time. As an alternative, an in silico approach can be used to predict the three-dimensional structure of proteins, namely the fold recognition method. The purpose of this study was to create a three-dimensional structure model of snakehead fish (Channa striata) calponin protein using the Phyre2 web server. The target protein sequence was obtained from UniProt KB with code K9LH64. The results of the study showed that the template for building the model was the c1wynA code. The results of the model (MP) evaluation obtained a coverage value was 45%, a confidence value was 100%, and an identity value was 69%. Validation of the model (MP) using the PROCHECK program showed the model was in the most favoured residue plot of 82.4%. This model deserves to be used as a model for calponin protein of snakehead fish, because the disallowed area was below 15%. The results of the analysis of interactions with other proteins using STRING-DB obtained the interaction model (MP) with Actin assembly-inducing protein (ACTA2) was 0.791; and Tropomyosin (TPM1) was 0.786. The results of molecular docking using PatchDock obtained the value of Atomic Contact Energy (ACE) for the calponin protein model (MP)-ACTA2 was 372.76 kJ/mol; Calponin model protein (MP)-TPM1 was 406.93 kJ/mol. The interactions that occured in the calponin model (MP)-ACTA2 were hydrogen bonds at residues Gly-41, Glu-60, Arg-64, Arg-66, Pro-67, Gly-68, Lys-71 and hydrophobic bonds at Arg-64, Lys- 71, Lys-72, Ile-73, Va-138. The interactions model of calponin model (MP)-TPM1 were hydrogen bonding at residues Ser-13, Lys-71, Ala-95, Tyr-96, Ser-136, Arg-137, Arg-150 and hydrophobic bonds at residues Leu-12, Ala-14, Lys-71, Ala-95, Val-138, Arg-150, Phe-152. Keywords: fold recognition, Phyre2 , 3D structure protein, calponin, protein-protein interaction
PENENTUAN POLA LONGSORAN DI DAERAH RAWAN LONGSOR BERDASARKAN NILAI RESISTIVITAS BUMI DI DESA SUNGAI LANGSAT KABUPATEN BANJAR Maya Utami; Sri Cahyo Wahyono; Simon Sadok Siregar
Jurnal Natural Scientiae Vol 3, No 1 (2023)
Publisher : Universitas Lambung Mangkurat

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.20527/jns.v3i1.8751

Abstract

Telah dilakukan penelitian tentang Pola Longsoran di Daerah Rawan Longsor Berdasarkan  Nilai  Resistivitas  Bumi  di  Desa  Sungai  Langsat,  Kecamatan Simpang Empat, Kabupaten Banjar. Penelitian ini bertujuan untuk mengetahui litologi berdasarkan nilai resistivitas bumi di daerah yang diperkirakan rawan longsor dan menentukan pola longsoran menggunakan metode tahanan jenis. Konfigurasi elektroda yang dipakai menggunakan metode Wenner-Schlumberger (1D). Data dari hasil pengolahan program Progress digunakan untuk menentukan litologi. Hasil litologi tersebut dibuat penampang dua dimensi dan tiga dimensi menggunakan program Surfer sehingga dapat ditentukan arah serta pola longsoran pada daerah pengukuran. Nilai tahanan jenis tanah/batuan antara 6,82 – 145,35 Ωm diduga sebagai zona lemah/pelapukan yaitu lapisan lempung sedangkan nilai tahanan jenis tanah/batuan antara 145,35 – 538,33 Ωm diperkirakan sebagai zona lapisan keras yaitu tanah endapan berpasir. Pola longsoran untuk tanah endapan berpasir  diperkiraan  pada  kedalalaman  antara  10  –  30  m,  ke  arah  koordinat X = 285740 mT dan Y = 9635900 mS. Untuk lapisan lempung, longsoran diperkirakan  terletak  pada  kedalaman  antara  4  –  6  m,  ke  arah  koordinat X = 285770 mT dan Y = 9635900 mS.  Besarnya sudut kemiringan lereng yang terbentuk  adalah  16,26o.  Pola  longsoran  pada  daerah  tersebut  adalah  pola longsoran translasi dan pola rayapan tanah.
PENGARUH KATALIS ASAM SULFAT PADA SINTESIS NITROSELULOSA TERHADAP DERAJAT SUBSTITUSI Fitriannoor Fitriannoor; Taufiqur Rohman Taufiqur Rohman; Mahmud Mahmud
Jurnal Natural Scientiae Vol 2, No 2 (2022): November 2022
Publisher : Universitas Lambung Mangkurat

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.20527/jns.v2i2.6671

Abstract

Effect of sulfuric acid as catalyst due to synthesis of nitrocellulose from pure cellulose towards substitusion degree had been done. The purpose of this research are to find FT-IR absorbance and substitution degree. Nitrocellulose wassynthesized using nitration method in a mixture nitric acid, sulfuric acid and water then cooled at 5OC - 15OC for 60 minutes. Results is showed that nitrocellulose synthesized has FT-IR character that the formation nitro functional group (-NO2) sharp peak at 1635 cm-1 were subtituted completely.  However the peak at 1361 cm-1 and 1288 cm-1 nitro functional group (-NO2) incompletely substituted because peak is not sharp.  So two hydroxyl functional group peak (-OH) at 3201 cm-1 and 3424 cm-1. Concluded, substitution degree using absorbance ratio from FT-IR spectrum is 2,89.
Analisis Sebaran dan Kerapatan Hutan Mangrove Menggunakan Landsat 8 di Kabupaten Tanah Bumbu Kalimantan Selatan Mikhail Rohim; Ichsan Ridwan; Fahruddin Fahruddin
Jurnal Natural Scientiae Vol 1, No 1 (2021): November 2021
Publisher : Universitas Lambung Mangkurat

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.20527/jns.v1i1.4425

Abstract

Mangroves are plants that live on beaches and river mouths, where these areas experience ups and downs of sea water. Around 3 million hectares of mangrove forest grow along 95,000 kilometers of Indonesia's coast, which is 23% of the world's total mangrove ecosystem. Indonesia's mangrove ecosystems are located in Papua, Kalimantan and Sumatra. This study aims to measure the distribution and density of mangrove forests in Tanah Bumbu Regency, South Kalimantan using Landsat 8 imagery with the support vector machine (SVM) classification method. Meanwhile, the density value was determined using the Normalized Difference Vegetation Index (NDVI) method. The results show that the mangrove distribution area is 2448.84 ha, of which the widest mangrove distribution is in the Simpang Empat area with an area of 1702.62 ha. Based on these results, it shows that the mangrove forest area in Tanah Bumbu Regency still has a fairly dense mangrove area.
Identifikasi Jenis Mineral Magnetik Berdasarkan Uji XRF pada Sedimen Permukaan Sungai Bone di Daerah Pertambangan di DesaTulabolo Timur, Suwawa, Kabupaten Gorontalo Nono’o, Sandra; Yunginger, Raghel; Tamuntuan, Gerald H; Demulawa, Meilan; Supu, Idawati
Jurnal Natural Scientiae Vol 3, No 2 (2023): November 2023
Publisher : Universitas Lambung Mangkurat

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.20527/jns.v3i2.9924

Abstract

This study aims to determine the Types of Magnetic Minerals in Bone River Sediments in the Mining Area of Tulabolo Village. The XRF test was used to identify Magnetic Mineral elements in Bone River Sediments, and electrical conductivity (EC), pH, and temperature parameters for in situ measurements of Bone River water samples and measures of mineral types was carried out on prepared sediment samples. The results showed that direct measurements on water samples showed that the values of EC, pH, and temperature were (1,620-1,900) µS/cm, (5-7), and (25.0-25.9)oC, respectively. While the results of measurements using XRF elements that have the most significant percentage are elements (Si), especially at the S10 point of 58.84% diamagnetic minerals, elements (Fe), especially at the S7 point of 22.80%, element (Al) at the S10 point of 8, 11%, elements (Ti) at point S1 1.84% which are ferromagnetic minerals. Elements (Ca) at end S2 of (2.67%), elements (K) at point S1 of 1.50% paramagnetic minerals.

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