Research Paper on Effects of 60Co gamma radiation doses on seed germination of Jatropha curcas L.

 

Baudouin K. Nyembo, Alexandre N. Mbaya, Calvin C. Ilunga, Jean-Louis N. Muambi and Luc L. Tshilenge wrote a research paper on  seed germination of Jatropha curcas L., entitle of "Effects of 60Co gamma radiation doses on seed germination of Jatropha curcas L."

This study aimed to assess the effects of different gamma radiation doses from Cobalt -60 isotopic source on seed germination and early growth parameters of Jatropha curcas L. Healthy and dry seeds were subjected to three doses of gamma rays (100, 200 and 300 Gy). The experiment was conducted using randomized complete block design, with three replicates. 

The significantly maximum germination percentage (89.85 %), seedling survival (92.3 %), seedling collar diameter (0.892 cm), plant height (17.30 cm), number of leaves (7) were observed at 30 days after germination. The results revealed that seed germination percentages and seedling shoot length decreased with increasing dose of gamma-rays. 

Higher gamma-ray dose (300 Gy) in particular had a pronounced effect on these germination parameters than others, probably because high-dose inhibited cell division due to free radicals and DNA system damage. The LD50 for seeds germination rates was obtained at 254 Gy. These results implied that germination traits of Jatropha curcas seeds were sensitive to increase in gamma-ray. 

Effects of 60Co gamma radiation doses on seed germination of Jatropha curcas L.|Ijaar vol-13-no-5-p-46-52 from Innspub Net

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Research Paper on Zooplankton Assessment and the Physico-Chemical Characteristics of Bitan-ag Creek by Gina C. Lacang

 

Map of Bitan –ag Creek, Cagayan de Oro, showing the sampling sites

Claire Ann Malaras, Genevive Precillas, Sean Michael S. Cabañeros, RJ Krista Raye Y. Leocadio and Gina C. Lacang from Department of Environmental Science and Technology, University of Science and Technology of Southern Philippines, Cagayan de Oro, Philippines, wrote a research paper on Zooplankton entitle of  "Zooplankton Assessment and the Physico-Chemical Characteristics of Bitan-ag Creek Cagayan de Oro City"

This research study aimed to analyze the physico-chemical characteristics of Bitan- ag creek and to assess zooplankton diversity. Specifically, it determined (1) the physico-chemical condition and nutrient load of the creek and compared to DENR Administrative Order (DAO) standard, (2) assessed how the physico-chemical parameters affect the distribution and abundance of zooplankton, (3) identify zooplankton species that are found in each sampling sites, (4) measure significant difference on the abundance and diversity of zooplankton between sites.  

Tierra Del Puerto, Brgy. Camaman-an, Cagayan de Oro City (Upstream)

The study made used of the descriptive-comparative design to determine quantitatively water quality parameters such as conductivity, water temperature, TDS, turbidity, salinity, water current, COD, DO, pH, nitrates and phosphorus.

C.M. Recto Avenue, Brgy .Lapasan Cagayan de Oro City (Midstream)

The results clearly revealed that some physico-chemical and nutrient load parameters exceeded the standard of class “C” water body, this includes: conductivity, TDS, turbidity, DO and phosphate content. A total of five (5) species of zooplankton belonging to three (3) families namely: Appendicularia, Daphniidae and Ameiridae were present.

Lapaz 1, Agora, Brgy. Lapasan, Cagayan de Oro City (Downstream)

Family ameiridae had the highest total number of three individuals which are found in first and third sites, whereas, the appendicularia and daphniidae settled only in the third sampling sites. Further, the study also showed significant difference on the abundance and diversity of zooplankton between sites. Thus, the distribution and abundance of zooplankton in Bitan –ag creek were greatly influenced by the condition of its physico-chemical and nutrient chemistry. The research suggested that there should be rehabilitation of Bitan –ag creek to avoid further degradation of its water quality.

Journal of Biodiversity and Environmental Sciences-JBES is an open-access scholarly research journal, published by International Network for Natural Sciences-INNSPUB. JBES published original scientific articles in different field of Environmental Sciences and Biodiversity. JBES published 2 Volume and 12 issue per calender year.

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