Bonded states

- Bonded Aggtegates

Semi-flexible hydrogen-bonded and non-hydrogen bonded lattice polymers

We investigate the addition of stiffness to the lattice model of hydrogen-bonded polymers in two and three dimensions. We find that, in contrast to polymers that interact via a homogeneous short-range interaction, the collapse transition is unchanged by any amount of stiffness: this supports the physical argument that hydrogen bonding already introduces an effective stiffness. Contrary to possi...

Triply-Bonded OszBrs2- Anion

Treatment of H20sBr6 with 1.5 equiv of CsMe5H in a mixture of 48% HBr and methanol or ethanol at reflux for 3 h gives a brown precipitate which has the empirical formula " ( C ~ M ~ ~ ) Z O S ~ B ~ ~ H " ; actually, this product is the unusual salt [ ( C ~ M ~ ~ ) ~ O S H ] ~ [ O S ~ B ~ ~ ] where the cation is the conjugate acid of decamethylosmocene and the anion contains an Os-Os triple bond...

Bonded resins in orthodontics.

JL he combination of acid-etching and bonding has led to dramatic changes in the practice of orthodontics. Newman began the revolution in orthodontics with the advent of epoxy-bonded attachments. Bonding has evolved and now is used for; placement of attachments, various types of retainers, and resin build-ups which address tooth size and shape problems encountered during orthodontic treatment. ...

Child Bonded Labor

Bonded labor has been already widespread since ancient times and has flourished at various periods in most countries. Bonded labor is outlawed by the 1956 U.N. Supplementary Convention on the Abolition of Slavery, the Slave Trade, and Institutions and Practices Similar to Slavery, and most countries have passed their own ban. However, it is estimated that millions of people are still held in bo...