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Removing stains from berries. Chemical experiments

Entertaining experiments in chemistry

Entertaining experiences at home / Chemistry experiments for children

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You probably love to eat strawberries, raspberries, currants and other berries in the summer. Moreover, they are delicious, especially when you eat them fresh, just picked from the bushes. They are so fragrant! But at the same time, it is possible that you, carried away by berries, will stain your clothes.

How to remove stains? To do this, try the following method: immediately cover the fresh stain with table salt, rinse first with clean water, and then wash it in the usual way.

Author: Shkurko D.I.

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Random news from the Archive

NB3N3020 - new frequency multiplier 29.01.2009

ON Semiconductor introduced the NB3N3020, a programmable frequency multiplier with high precision, low phase noise, and low edge jitter.

The chip provides both LVPECL and LVCMOS clocks from a single device, enabling the NB3N3020 to be used in a wide range of applications, including networking, consumer electronics, and computers. The IC has three frequency select pins with three LVCMOS logic levels, which provide a choice of one of 26 frequencies, allowing designers to meet the requirements and replace multiple clock sources in various systems with one customizable chip.

ON Semiconductor's NB3N3020 Programmable Frequency Multiplier has a wide output frequency range from 8 MHz to 210 MHz. The microcircuit uses quartz with parallel resonance at the first harmonic with a frequency of 5,0 ... 27 MHz or an unbalanced clock source LVCMOS with a frequency of 2,0 ... 210 MHz for operation and generates a differential LVPECL output and an unbalanced LVCMOS output signal of the selected frequency, which is obtained by multiplying the input frequency.

When the output enable (OE) LVCMOS signal is low, the chip disables the clock outputs, which allows developers to control the presence of clocking in systems being created.

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