Recent Patents on Engineering - Volume 6, Issue 3, 2012

With the depletion of resources, biomass becomes a promising source of chemicals and fuels, currently obtained from petroleum. Cellulose is the most abundant material produced in earth, but it is difficult to dissolve which makes its transformation limited. Dissolution of cellulose requires severe temperature, non-conventional solvents and/or extreme acid or basic conditions. Thus, its processing is very pollutant. Ionic liqui Read More

This review discusses the recent developments in supercritical fluid extraction (SFE) of bioactive compounds from botanic matrices during the period of 2007-2012. The main operational parameters affecting the extraction yields that are presented and discussed include: pressure, temperature, extractor geometry, average size of particles, extraction time, solvent flow rate and use of cosolvents. Emphasis is given t Read More

Solid-state fermentation has emerged as a potential technology for production of microbial products such as feed, fuel, food, industrial chemicals and pharmaceutical. This technology is worth of attention not only from researchers but also from industry, especially in the last two decades. Based on these aspects, a review of patents and scientific articles is presented to cover the application of solid-state fermentation on dif Read More

Ventricular fibrillation (VF) and ventricular tachycardia (VT) are lift-threatening cardiac arrhythmias that could be catastrophic if no defibrillation shock is applied to the subject within a few minutes. Correct and prompt detection of these shockable rhythms and preparedness to intervene with cardiopulmonary resuscitation (CPR) and especially the delivery of an electrical shock are potentially lifesaving. The automated external Read More

In this paper, we have proposed and experimentally demonstrated an optical access network based on orthogonal frequency division multiplexing (OFDM) technology. The OFDM based passive optical network (PON) employs multicarrier to carry different information transmitted to different optical network units (OUNs). In this paper, we have systematically analyzed the system performance of OFDM-PON under different con Read More

With the increasing requirement of communication rate and capacity, Raman amplifiers are becoming the most promising technologies in optical communication systems. There are many patents about Raman amplifiers. In this paper, some important inventions in the patents about Raman amplifiers published since the last 3 years will be presented as typical examples. This paper will introduce various types of inventions ab Read More

The paper gives a brief overview of current state of patents in Serbia. Preview includes the number of applicants and registered patents. Here are presented two most important patents in the field of petroleum industry. System for thermal paraffin removal in tubing and Piston pump with hydraulic power transmission are related to the efficient production of oil. The System for thermal paraffin removal in tubing won first pl Read More