Books published by Mdpi AG

Gastric cancer is a leading cause of cancer deaths, but analysis of its molecular and clinical characteristics has been complicated by histological and aetiological heterogeneity. Stomach cancers are 90% adenocarcinoma; lymphoma, carcinoid, and stromal tumours may occur.  Adenocarcinoma can be subdivided into histological Lauren and the World Health Organization (WHO) classifications, but this information has not led to the development of histologic subtype-specific treatment options. One way to potentially improve treatment for gastric cancers is to better understand the pathogenesis of this disease, the contribution of Helicobacter pylori infection, and host immune response to lead to the development of integrated histological and molecular classification schemes for gastric cancer. The hope is that these studies may facilitate the development of clinical trials to explore therapies in defined sets of patients, ultimately improving survival from this deadly disease.

The most efficient process to reduce NOx emissions from lean exhaust gases, selective catalytic reduction (SCR) with ammonia, has undergone tremendous development over the past decades. Originally only applied in stationary power plants and industrial installations, SCR systems are now installed in millions of mobile diesel engines, ranging from off-road machineries, to heavy-duty and light-duty trucks and passenger cars, to locomotives and ships. All of these applications involve specific challenges due to tighter emission limits, new internal combustion engine technologies, or alternative fuels.Three review articles and 14 research articles in this book describe recent results and research trends of various aspects of the SCR process. Reaction engineering aspects, such as the proper dosage of ammonia or urea, respectively, are as important as further developments of the different SCR catalysts, by deepening the understanding of their functionality or by systematic improvements of their properties, such as low-temperature activity, selectivity, or poisoning-resistance. Another covered aspect is cost reduction through the use of cheaper base materials for the production is active and stable SCR catalysts. Finally, research efforts are reported to develop SCR processes with different reducing agents, which would open doors to new applications in the future. The range of topics addressed in this book will stimulate the reader’s interest as well as provide a valuable source of information for researchers in academia and industry.