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Wyświetlanie 1-3 z 3
Tytuł:
Distribution of heavy metal lead (Pb) on macrozoobenthos in the Karangsong waters area, Indramayu Regency
Autorzy:
Rosidah, Rosidah
Prabowo, Agung
Lili, Walim
Herawati, Titin
Powiązania:
https://bibliotekanauki.pl/articles/1161875.pdf
Data publikacji:
2018
Wydawca:
Przedsiębiorstwo Wydawnictw Naukowych Darwin / Scientific Publishing House DARWIN
Tematy:
Karangsong waters area
bioconcentration factor
lead (Pb)
macrozoobenthos
Opis:
The study was conducted in July - August 2018 with the aim of analyzing the concentration of lead heavy metals (Pb) in water, sediment and macrozoobenthos in the Karangsong waters area, Indramayu Regency. The research method used is a survey method with purposive sampling technique that is the determination of location based on the existence of certain objectives and in accordance with various considerations, then observed the content of lead metal (Pb) in the Central Laboratory of Padjadjaran University. The research was conducted in situ and exsitu. Parameters of insitu research include temperature, pH and DO carried out in Karangsong waters, Indramayu Regency. Exsitu research parameters include testing of lead metal (Pb) on water, sediment and macrozoobenthos conducted at the Central Laboratory of Padjadjaran University. The results showed that the Pb concentration in the Karangsong waters had exceeded the threshold, which ranged between 1,05 – 1,33 mg/l, while the Pb concentration in sediment was higher than the Pb concentration in water. Lead metal in sediment has not exceeded the threshold. The ability of macrozoobenthos to accumulate lead metal in water and sediment (Bioconcentration Factor / BCF) is included in the low accumulative category because BCF is less than 100.
Źródło:
World Scientific News; 2018, 112; 207-216
2392-2192
Pojawia się w:
World Scientific News
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Distribution and Condition of Coral Reefs in the Waters of Biawak Island, Indramayu Regency, West Java, Indonesia
Autorzy:
Rizal, Achmad
Apriliani, Izza Mahdiana
Herawati, Heti
Paradhita, Lantun
Powiązania:
https://bibliotekanauki.pl/articles/1030508.pdf
Data publikacji:
2020
Wydawca:
Przedsiębiorstwo Wydawnictw Naukowych Darwin / Scientific Publishing House DARWIN
Tematy:
Biawak Island
Coral Reef
Distribution and Condition
Opis:
This research aimed to find out the condition of coral cover and the distribution or spreading of coral reefs in the waters of Biawak Island using coral reef monitoring. Several supporting aspects that were also required to know were the percentage value of coral cover, diversity index, uniformity index, similarity index, dominance index, and the value of coral mortality, to support the activities of the management of coral reef of Biawak Island. This research was conducted in the waters of Biawak Island, Indramayu Regency, West Java. The research was conducted using a survey method through field data collection. Quantitative and qualitative data collection was conducted using the line transect method (Line Intercept Transect / LIT) to collect data on 3 stations at a depth of 3 and 7 feet using 3 replicates per station. Distribution of corals in the waters of Biawak Island was spread evenly, known from the percentage of frequency of coral lifeform converge which was found mostly above 50%, a low dominance index ranged from 0.128 to 0.216, a diversity index ranged from 1.884 to 2.246, and supported also by the similarity index value ranged from 95.24% - 100.00%. The condition of coral reefs in the waters of Biawak Island ranged from a poor to moderate criteria whereas the percentage of coral cover obtained was between to 17.04% to 44.93%.
Źródło:
World Scientific News; 2020, 144; 141-157
2392-2192
Pojawia się w:
World Scientific News
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Total phenolic, flavonoid content and antioxidant capacity of stem bark, root, and leaves methanolic extract of Rhizophora mucronata Lam.
Autorzy:
Mulyani, Yeni
Syaputra, Nabil Dio
Dewi, Khoirunisa Candra
Lili, Walim
Agung, M. Untung Kurnia
Powiązania:
https://bibliotekanauki.pl/articles/1076655.pdf
Data publikacji:
2019
Wydawca:
Przedsiębiorstwo Wydawnictw Naukowych Darwin / Scientific Publishing House DARWIN
Tematy:
Antioxidant
Flavonoid
Indramayu Regency
Phenolic
Rhizophora mucronata
Secondary metabolites
Opis:
The study was carried out to evaluate the phytochemical constituents, antioxidant activity and the content of total phenolic and flavonoid in the methanolic extract from stem bark, root, and leaves of Rhizophora mucronata from Karangsong, Indramayu Regency, West Java, Indonesia. The antioxidant activity was evaluated using 2,2-diphenyl-1-picrilhydrazyl (DPPH) assay. Total phenolic and flavonoid contents were determined according respectively to Folin-Ciocalteau method, and aluminium trichloride method. The methanol extract from stem bark of R. mucronata contained secondary metabolite such as phenolic, flavonoid, tannin and saponin. The stem bark of R. mucronata showed the highest phenolic and flavonoid content and possessed a higher antioxidant activity (IC50 84.80 µg·m/L) than that of root (IC50 166.95 µg·m/L) and leaves (IC50 90.51 µgmL1). Total phenolic and flavonoid content in the stem bark of R. mucronata were 131.91 ±1.7 mg gallic acid equivalents/g and 902 ±0.7 mg quercetin equivalents/g, respectively.
Źródło:
World News of Natural Sciences; 2019, 26; 118-127
2543-5426
Pojawia się w:
World News of Natural Sciences
Dostawca treści:
Biblioteka Nauki
Artykuł
    Wyświetlanie 1-3 z 3

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