The fundamental objective of this research has been to apply a novel isotopic technique to delineate the biogeochemical pathways that methanogenic archaea utilize during the final step of coal biodegradation when converting simple energy sources (primarily thought to be H 2 and acetate; Figure 1) into methane and CO 2. This long-standing problem in subsurface biogeochemistry has relevance to bo...

underground coal gasification (ucg) is a non-conventional method of extracting gas from coal. the primary advantage of ucg is that it recovers gas from uneconomical or unminable coal, potentially increasing the value of the world’s coal reserves by an estimated 70%; for this reason, ucg has been implemented at sites around the world. however, the gaseous, liquid and solid waste streams which ac...

This paper deals with the experimental results of a xenon flash-lamp pumped passively Q-switched Nd:YAG laser using Cr4+:YAG saturable absorber. The need of a laser cavity to be integrated into a time-of-flight laser range finder is of great interest as an experimental investigation of several laser resonators. Two types of laser resonator, with different lengths, have been studied: the flat-fl...

Nowadays laser is extensively used in various industrial, communicative, medical, and other fields. Using laser in medicine has enabled physicians to perform the most accurate and finest operations within few minutes. Non-observance of safety points during laser performance could be seriously harmful for the medical staff and the patient. Therefore, in order to prevent the possible damage of th...

Successful rabbit production relies heavily on the use of adequate practices that enhance specific aspects reproduction, such as mating, ovulation and lactation. Regardless type unit or strain rabbits used, these processes rely a complex chain neuroendocrine steps include particular hormones, peripheral stimuli activation discrete brain regions. Such is case, for instance, reflex ovulation, whi...

AIM To study the response of the bacterial community to bioremediation of a soil with an aged contamination of crude oil. METHODS AND RESULTS The bacterial community in laboratory soil columns during a 72-day biostimulation treatment was followed by analysing the number of total cultivable hydrocarbon-degrading bacteria, soil respiratory activity and the 16S-23S rDNA internal transcribed spac...