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Digital video recorder

13.07.2001

A digital video recorder that records not on the usual VHS video cassette, but on a permanent hard magnetic disk, is convenient both for operational recordings of television terrestrial and satellite programs, and for recordings set by an electronic timer.

Can be used for subsequent dubbing to analog and digital video cassette recorders, DVD recorders. The reproduced images do not differ from those coming to the screen from the TV center.

Depending on the model, the recording time is 20-40 hours.

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Pesticides kill bees 18.04.2012

Scientists at the Harvard School of Public Health claim that the global extinction of bees in recent years is due to the use of a widely used pesticide called imidacloprid. The author of the article, Professor Alex Liu, is confident that his group has found "compelling evidence" linking imidacloprid and the hitherto unexplained disappearance of bees from hives.

It all started in 2006 in the USA, when local beekeepers began to state with horror that their bees, once again leaving their hive, did not return back. The bee pandemic affected more than just honey production, because bees pollinate about a third of plants of interest to humans, including fruits, vegetables, nuts, and livestock food such as alfalfa and clover. According to experts, the massive loss of honey bees could lead to multi-billion dollar losses.

Bees can be exposed in two ways - through the nectar of plants or the food given to them by beekeepers. Among the prime suspects was imidacloprid. In the summer of 2010, the researchers began a 23-week trial in four different bee farms - three hives in each of them were exposed to high concentrations of imidacloprid, and the fourth, the control hive, was carefully protected from this "gift". After 12 weeks all bees were alive. But after 23 weeks, 94% of the exposed hives had died. The control hives survived completely.

The results of the study are consistent in nature with data on the phenomenon of the disappearance of bees, called CCD - Colony Collapse Disorder. Under CCD, the hives were empty everywhere except where food was stored; very few dead bees were found nearby. In any other circumstance - an insect infestation or a sudden infectious disease - dead bees are usually found either in or near the hives. Here they just fly away and die.

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