Homooxacalixarenes: I. Structure,Synthesis, and Chemical Reactions

Data published on the structure, preparation, and chemical reactions of homooxacalixarenes with various number of aromatic fragments and dihomooxabridges in macrocycles were analysed and summarized.     

Chemical-garden formation, morphology, and composition. II. Chemical gardens in microgravity

We studied the growth of metal-ion silicate chemical gardens under Earth gravity (1 g) and microgravity (μg) conditions. Identical sets of reaction chambers from an automated system (the Silicate Garden Habitat or SGHab) were used in both cases. The μg experiment was performed on board the International Space Station (ISS) within a temperature-controlled setup that provided still and video images of the experiment downlinked to the ground. Calcium chloride, manganese chloride, cobalt chloride, and nickel sulfate were used as seed salts in sodium silicate solutions of several concentrations. The formation and growth of osmotic envelopes and microtubes was much slower under μg conditions. In 1 g, buoyancy forces caused tubes to grow upward, whereas a random orientation for tube growth was found under μg conditions.     

Chemical biology: the promise, and confusion, of adolescence.

It takes time for any new scientific discipline to gain momentum, and chemical biology is no exception. But with the formation of new training programs and interdisciplinary departments, the changes are coming.     

Chemical markup,XML, and the World Wide Web. 4. CML schema

A revision to Chemical Markup Language (CML) is presented as a XML Schema compliant form, modularized into nonchemical and chemical components. STMML contains generic concepts for numeric data and scientific units, while CMLCore retains most of the chemical functionality of the original CML 1.0 and extends it by adding handlers for chemical substances, extended bonding models and names. We propose extension via new namespaced components for chemical queries, reactions, spectra, and computational chemistry. The conformance with XML schemas allows much greater control over datatyping, document validation, and structure.     

Chemical,Plasma Chemical,and Photochemical Methods for Preparing Digermane

Russian Journal of Applied Chemistry - Photochemical, chemical, and plasma chemical procedures for preparing digermane were studied experimentally. The plasma chemical procedure in corona discharge...