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.
ABB is an international journal dedicated to the latest advancement of biosciences. The goal of this journal is to provide a platform for scientists and academicians all over the world to promote, share, and discuss various new issues and developments in different areas of biosciences.
"Just as a failure to treat a potentially lethal prostate cancer is generally considered inappropriate from a quality-of-care perspective, overtreatment of lower-risk cancers is also not in the patient's best interest"...
The NOAA Earth System Research Laboratory was formed to observe and understand the Earth system and to develop products, through a commitment to research that will advance the National Oceanic and Atmopsheric Administration's environmental information and services on global to local scales.
On September 30, 1882, German physicist Johannes Wilhelm Geiger was born. He is best known as the co-inventor of the Geiger counter and for the Geiger–Marsden experiment which discovered the atomic nucleus.
A collection of research on the effects of non-ionizing EMF on biology. This is not necessarily meant for people with Environmental Illness (MCS+EHS) specifically, but to demonstrate that electromagnetic pollution is harmful to everyone — every living organism. There have been thousands of studies over the years, but I haven't found a very comprehensive, digestible database for the research. Needless the say, with the amount of radiation we're exposed to on a daily basis and prospect of global WiFi around the corner, the findings are grim.
M. Krumholz, R. Klein, and C. McKee. (2012)cite arxiv:1203.2620Comment: 17 pages, 15 figures, emulateapj format, submitted to ApJ. For movies of the results, see http://www.ucolick.org/~krumholz/downloads.html.
A. Chmielewski, M. Haji-Saeid, and S. Ahmed. Nuclear Instruments & Methods in Physics Research Section B-Beam
Interactions with Materials and Atoms, (2005)