Distribusi Spasial dan Temporal Petir di Sumatera Barat

Saufina, Elfira; Marzuki, Marzuki

doi:10.25077/jfu.5.4.303-312.2016

Cited by 2 publications

(1 citation statement)

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“…Fish samples were taken using fishing nets. The content of Hg in the gill tissue of Red Bader Fish (B. altus) was measured using the Atomic Absorption Spectroscopy (AAS) method conducted at the Chemical Laboratory of Brawijaya University [8] conducted at the Chemistry Laboratory, Faculty of Mathematics and Natural Sciences, Universitas Brawijaya. Meanwhile, metallothionein testing of the gill tissue of Red Bader fish (B. altus) was carried out using an immunohistochemical method, including adding 1-3 drops of Phosphate Buffer Saline (PBS) EDTA (Ethylene Diamine Tetra Acetic Acid) and Na citrate solution added to each sample, putting the sample into an oven at 95°C for 15 minutes, wash the sample with 0.3% H2O2 twice with PBS for three times every 5 minutes, incubate the sample with 1% PBS serum for 30 minutes, add the primary antibody of metallothionein (Mouse-METALLOTHIONEIN-IgG1/Thermofisher Scientific) before incubation in the refrigerator overnight, measuring the density and intensity of metallothionein by transferring the sample to a microscope slide, analyzing the density and intensity of metallothionein with ImageJ software [9].…”

Section: Fish and Water Samplingmentioning

confidence: 99%

Relationship between Metallothionein and Mercury (Hg) in the Gill Tissue of the Barbonymus altus in the Brantas River Jombang, East Java

Anjasmara

Hertika²,

Yanuhar³

2023

JELS

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Pollution of river waters is most often the result of human activities in managing agricultural land, industry, and transportation. The entry of pollutants such as heavy metal mercury (Hg) into the waters can interfere with the survival of fish waters. Red Bader Fish (Barbonymus altus) can be used as a biomarker in analyzing aquatic environmental conditions in the Brantas River, Jombang, East Java. This study aimed to analyze the relationship between metallothionein and heavy metal mercury in the gill tissue of Barbonymus altus. Sampling was conducted at three stations with three replications from February to March 2022. Data analysis used regression and correlation methods to determine the relationship between metallothionein and metal mercury in gill tissue. The density and intensity of metallothionein in the gill tissue of Barbonymus altus were analyzed using the immunohistochemical method. The mercury (Hg) content in the gill tissue of Barbonymus altus was analyzed using Atomic Absorption Spectroscopy (AAS). The results showed that the metallothionein density at each station included station 1

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Section: Fish and Water Samplingmentioning

confidence: 99%

Relationship between Metallothionein and Mercury (Hg) in the Gill Tissue of the Barbonymus altus in the Brantas River Jombang, East Java

Anjasmara

Hertika²,

Yanuhar³

2023

JELS

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Influence of topography on lightning density in Sumatra

Muharsyah

Marzuki

Vonnisa

et al. 2021

J. Phys.: Conf. Ser.

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Lightning is one phenomenon that plays an essential role in weather modeling and forecasts. Moreover, lightning also has an impact on humans and facilities. Lightning shows variations both temporally and spatially. In this study, the spatial distribution of lightning in Sumatra was examined to see topography’s effect on lightning density in this region. We analyzed lightning data from the World Wide Lightning Location Network (WWLLN) observation. Topographic data, particularly the altitude and terrain slope data, were obtained from the digital elevation model (DEM) Shuttle Radar Topography Mission (SRTM). It was found that the lightning density is slightly correlated with the terrain slope and the altitude. High concentrations of lightning are observed in the land, consistent with some previous studies. Lower concentrations are seen on Sumatra’s western side, particularly in the hillside of the Barisan Mountains. Although Sumatra’s eastern side has a low elevation and a small topography slope, a high lightning concentration is observed in this region. The distribution of lightning shows seasonal variation in which the largest density is found during the dry season (MAM), which is different from the previous studies.

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Distribusi Spasial dan Temporal Petir di Sumatera Barat

Cited by 2 publications

References 0 publications

Relationship between Metallothionein and Mercury (Hg) in the Gill Tissue of the Barbonymus altus in the Brantas River Jombang, East Java

Relationship between Metallothionein and Mercury (Hg) in the Gill Tissue of the Barbonymus altus in the Brantas River Jombang, East Java

Influence of topography on lightning density in Sumatra

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