What does HB mean on silver?

What does HB mean on silver? English silver hallmarks: British maker’s marks identification HB. Is inlaid silver real silver? Holmes & Edwards inlaid silverplate uses a unique process to inlay sterling silver in high wear locations. Then the entire piece was silver-plated. This process was patented, and the term inlaid silver was trademarked. Holmes & […]

What is a preset variable resistor?

What is a preset variable resistor? Presets are miniature versions of standard variable resistors. They are designed to be mounted directly onto circuit boards and adjusted only when the circuit is built. For example they may be used to set the frequency of an alarm tone or the sensitivity of a light-sensitive circuit. How does […]

What is Eric Ohio?

What is Eric Ohio? Employers who have active accounts with ODJFS may file electronically using the Employer Resource Information Center (ERIC) at http://eric.ohio.gov or the Ohio Business Gateway. What is Eric system? ERIC is an internet-based digital library of education research and information sponsored by the Institute of Education Sciences (IES) of the U.S. Department […]

What does an apiarist keep?

What does an apiarist keep? A beekeeper (or apiarist) keeps bees in order to collect their honey and other products that the hive produce (including beeswax, propolis, flower pollen, bee pollen, and royal jelly), to pollinate crops, or to produce bees for sale to other beekeepers. A location where bees are kept is called an […]

How do you predict a chemical shift in NMR?

How do you predict a chemical shift in NMR? Tetramethylsilane [TMS;(CH3)4Si] is generally used for standard to determine chemical shift of compounds: δTMS=0ppm. In other words, frequencies for chemicals are measured for a 1H nucleus of a sample from the 1H or resonance of TMS. It is important to understand trend of chemical shift in […]

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