Dec

6

Convert Plus

December 6, 2005 | 1 Comment

Just arrived in my Inbox: Convert Plus – Online Units Conversion. My first impression is that it seems to be a very interesting online converter. It is very comprehensive and has the benefit of converting some units and measures to somewhat exotic units systems, which is not usually found in this kind of converters.

Apr

4

Attograms, Zeptograms and Yoctograms

April 4, 2005 | Leave a Comment

The measurement of the mass of a protein molecule, on the zeptogram (10-21 g) scale, is now possible, as can be read on New Scientist.com. Previously, in 2000, the mass of a cluster of gold atoms, near one attogram (10-18 g) was already measured. The next goal, a gigantic step, is to develop devices capable […]

Apr

4

WWW Unit Converter

April 4, 2005 | 2 Comments

One of the best and most complete online units’ converters: WWW Unit Converter.
Update: An extensive list of online converters and calculators can be found on Martindale’s Reference Desk: Units Conversion, Chemistry Calculators and Calculators for different fields and activities.

Mar

29

A kilogram is a kilogram. Well, may be not…

March 29, 2005 | Leave a Comment

According to the article New look for the kilogram, published on PhysicsWeb, researchers from University of Reading and NIST have proposed new methods to define kilogram, based on fundamental constants. The kilogram, one of the seven International System of Units (SI) base units (the only which is still defined by a material artefact) is defined […]

Feb

2

Roentgenium

February 2, 2005 | Leave a Comment

IUPAC Recommendation about the name and symbol of the element with atomic number 111. The recommended name is Roentgenium with symbol Rg. (see report in pdf format)

Jan

22

New Best Estimates of the Values of the Fundamental Constants

January 22, 2005 | Leave a Comment

New Best Estimates of the Values of the Fundamental Constants is an interesting article by Ian Mills, published in the IUPAC magazine (May-June 2004), Chemistry International. The best estimates for these values can be found in this table (PDF), or then in Fundamental Physical Constants, part of the excellent NIST Reference on Constants, Units, and […]