Penicillin acylase (PA) from Escherichia coli can catalyze the coupling of an acyl group to penicillin- and cephalosporin-derived beta-lactam nuclei, a conversion that can be used for the industrial synthesis of beta-lactam antibiotics. The modest synthetic properties of the wild-type enzyme make it …

Indonesia's decentralization in the form of regional autonomy has opened many new opportunities for the people. Especially in the regions, higher authority allowed local governments to develop their regions and increase the people's welfare. Despite a number of positive developments, there are many problems …

Managing the channel network brings challenges each distributing manufacturer will have to face business life. As the ultimate goal of both manufacturer and intermediaries is to maximize their profitability in the market, it takes mutual understanding and serious devotion, close teamwork and effective …

Michael additions of α-nitroesters with enones and α,β-unsaturated aldehydes result in quantitative conversions to the corresponding 1,4-adducts by performing the reactions in water in the presence of ytterbium triflate as water-tolerant Lewis acid.

Rapid creation of new services for telecommunications systems is hindered by the feature interaction problem. This is an important issue for development of IN services, not only because of interactions\namong IN services themselves but because of interactions of IN services with switch-based services …