Environmental risk assessment of Macabalan creek water in Cagayan de Oro, Philippines - JBES 2017

By: Joseph Bansilay, Ma. Judith Felisilda, Mohammad-Nor Ibrahim, Keir Joshua Maraviles, Richiel Lou Villanueva, Van Ryan Kristopher R. Galarpe

J. Bio. & Env. Sci. 2017

Abstract:

Creek water carries both domestic and commercial wastewater consequently draining organic and inorganic pollutants to coastal water.

 

The present study dealt on the environmental risk assessment of creek water stretching in Macabalan-Cagayan de Oro, Philippines. Selected physicochemical analyses of water samples were carried in both temporal and spatial variations. Risk quotient (RQ), water quality index (WQI), and brine shrimp lethality test (BSL) was employed to draw environmental risk estimate. Overall, dissolved oxygen (DO) concentrations were below the standard set regardless of temporal and spatial variations. Both RQ and WQI showed good statuses on creek water quality despite the low DO.

 

The BSLT similarly indicated a higher concentration for LC50 to be established. The study was preliminary and further monitoring may be essential.

 

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Water quality and risk assessment of tributary rivers in San Fernando, Bukidnon Philippines-JBES

By: Van Ryan Kristopher R. Galarpe, Kristal Jane L. Heyasa, Brawner Brian L. Heyasa

J. Bio. Env. Sci. 11(1), 266-273, July 2017.

Bukidnon, Philippines being identified as an agricultural province needs to ensure water sustainability vital to support its agroeconomy.

 

This study considered Tigua River with three river tributaries and Salug River with single station in San Fernando, Bukidnon. Analysis employed single sampling technique to initially assess river tributaries. Studied water quality parameters were pH, temperature, dissolved oxygen (DO), oxidizing redox potential (ORP), turbidity, salinity, conductivity, total dissolved solids (TDS) using portable pre-calibrated meters. Nitrates were also determined using Bruccine colorimetric method. Analyzed heavy metals in total form were copper (Cu), cadmium (Cd), lead (Pb), and chromium (Cr) using Flame-Atomic absorption spectrophometry (AAS). Overall, studied river tributaries passed national regulation with risk quotient (RQ) showing no potential pollution. Heavy metals were below detection limit indicating less traceable quantities in river tributaries.

Salinity, conductivity, and TDS showed positive correlation. The study was preliminary and further monitoring may be needed.

Get citied by just copy the text: Van Ryan Kristopher R. Galarpe, Kristal Jane L. Heyasa, Brawner Brian L. Heyasa. Water quality and risk assessment of tributary rivers in San Fernando, Bukidnon Philippines. J. Bio. Env. Sci. 11(1), 266-273, July 2017.

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Antibacterial property of Atuna racemosa Rafin. Chrysobalanaceae shell and kernel extracts- IJB

Source: internet

By: Jinebeth S. Pacaña, Van Ryan Kristopher R. Galarpe

Abstract

This research evaluated the antibacterial potential of the aqueous, ethyl acetate, methanol, and decocted extracts of the shell and kernel of Atuna racemosa Rafin. Chrysobalanaceae (tabon-tabon). 

The antimicrobial screening was done against Escherichia coli and Staphylococcus aureus by paper disc diffusion method. The A. racemosa shell and kernel showed resistant to intermediate antimicrobial activity against E. coli and S. aureus in aqueous extracts with mean zone of inhibition of 7.7 mm and 9.8 mm, ethyl acetate extracts with 9.2 mm and 12.8 mm, methanol extracts with 9.5 mm and 13.2 mm, and decoction extracts with 7.3 mm and 11.0 mm, respectively. Ethyl acetate extracts with the highest antibacterial activity against E. coli obtained minimum inhibitory concentration values of 0.11375 mg/mL in shell and 2.92 mg/mL in kernel for both bacterial strains. Methanol extracts with the highest antibacterial activity against S. aureus obtained minimum inhibitory concentration values of 0.81375 mg/mL in shell for both test organisms, and 8.57 mg/mL for E. coli and 2.138 mg/mL for S. aureus in kernel. Overall, the ethyl acetate and methanol extracts of A. racemosa kernel showed good antibacterial potential against bacterial strains. Further investigation is needed to determine the bioactive components present in these extracts.

Citation Sample: Jinebeth S. Pacaña, Van R.K.R. Galarpe. July 2017. Antibacterial property of Atuna racemosa Rafin. Chrysobalanaceae shell and kernel extracts. Int. J. Biosci. 11(1), 443-448

Full articles available at: Antibacterial property of Atuna racemosa Rafin.

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