Science Magazine - EurekaMag.com
Mannheim, Germany (PRWEB) February 17, 2012
The Science Magazine EurekaMag.com publishes insights into all areas of natural sciences including biology, agriculture, horticulture, forestry, geography, environment and health. Drawing from this pool of scientific disciplines, it provides articles, reviews and insights on natural sciences topics. While the Science Magazine Research Category contains over 36 million references, most of the reviews are included in the Science Magazine Keyword Category of the online magazine. The latter category now includes three newly published insights into Aranha Mouse Spider, Holocene and Lantana.
The EurekaMag.com review of Aranha Mouse Spider covers spiders of the genus Missulena which are indigenous to Australia and Chile. The bite of a mouse spider is potentially serious but funnel-web antivenom has been found to be an effective treatment for bites. The EurekaMag.com insight covers the toxin of Aranha Mouse Spiders which can be isolated using reverse-phase high-performance liquid chromatography. This venum was shown to cause an increase in resting tension, muscle fasciculation and a decrease in indirect twitch tension in a chick biventer cervicis nerve-muscle bioassay. Aranha mouse spiders may also contain neurotoxins responsible for serious systemic envenomation. Alpha-Latrotoxin appears to be the main neurotoxin responsible for the envenomation syndrome known as 'latrodectism' following such spider bites. A cohort study showed that of 49 bites, 45 occurred on distal limbs. Local effects included severe pain, puncture marks and bleeding, and local redness. These effects can, however, be neutralized by antivenom raised against the venom of the Sydney funnel-web spider Atrax robustus. Despite this there is still ongoing debate about the significance of bites by Aranha mouse spiders and the frequency of severe envenoming by funnel-web spiders.
EurekaMag.com presents a review of Holocene which is a geological epoch which began at the end of the Pleistocene around 12,000 years ago and continues to the present. This epoch has been identified with the current warm period and based on that past evidence, can be considered an interglacial in the current ice age. The EurekaMag.com insight discusses the currently prevailing atmospheric circulation patterns which are theorized on the basis of corresponding changes of surface boundary conditions and known dynamic behavior of the atmosphere. After four pine periods with various proportions of Quercus between 35,000 and 7,000 BP, the Holocene vegetation of indonesia became more diversified with periods of alder, pine, fir and mixed oak forests before the appearance of the present cultivated landscape. This fact and the effects of El Nino events on drought stress and flammability of the lowland rain forest biome in Southeast Asia led to the hypothesis that conditions in the Pleistocene and Holocene must have favored the occurrence of wildfires. More recently human deforestation is responsible for a carbon flux towards the atmosphere which is ten times the mean annual flux due to vegetation change in response to climate change. They predominantly occur in the low-lying Holocene part of Indonesia, once a larger wetland composed of various types of mire.
The EurekaMag.com insight into Lantana covers the genus of about 150 species of perennial flowering plants (Verbenaceae). They are native to tropical regions of Africa and the Americas but exist in most tropical regions. The genus includes both herbaceous plants and shrubs growing up to two meters in height. The EurekaMag insight into Lantana covers the effect of Lantana leaf extracts against the agricultural pathogen Phytophthora capsici. Among the antagonists, Trichoderma isolates were the most effective in inhibiting the growth of Phytophthora capsici. Least inhibition was obtained with Pseudomonas isolate, followed by Bacillus species. Among the 10 plant extracts, the garlic extract was highly inhibitory, followed by leaf extracts of duranta, eupatorium, neem and lantana. Lantana is a major weed in tropical areas and can cause the death of livestock including cattle. One study shows that in 461 necropsies cases the cause of death of cattle was attributed to the ingestion of poisonous plants including Lantana species. In a given outbreak the number of affected cattle was substantially higher than the number of necropsies performed.
The Science Magazine EurekaMag.com was launched in November 1998 as the online version of the French science magazine "Eurêka - Le magazine des sciences" published since 1995. During the past decade, it has emerged as a comprehensive aggregator of information on biology, on the applied life sciences agriculture, horticulture and forestry, on the earth sciences, on the environmental sciences, and on the health sciences.
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