Stearyl acyl carrier protein, chemically prepared from 1-W stearic acid and Escherichia co2i acyl carrier protein, is desaturated to oleic acid by extracts of photoauxotrophic Euglena gracilis and of spinach. The soluble stearyl acyl carrier protein desaturase system from Eug~ena has been separated into three components, a reduced triphosphopyridine nucleotide oxidase, the desaturase, and a non...

Objectives After reading this article, the reader will be able to:  Briefly discuss the significant milestones in the search for a substitute for human blood.  List several factors driving the search for a blood substitute.  List the characteristics of an ideal blood substitute.  Name and explain the four phases of clinical trials required before a drug can be approved by the Food and Drug ...

Chemical looping combustion (CLC) is a key technology for oxy-fuel combustion with inherent separation of CO2 from a flue gas, in which oxygen is derived from a solid oxygen carrier. Multi-cycle CLC performance and the product selectivity towards CO2 formation were achieved using mixed oxide of Cu and Mn (CuMn2O4) (Fd3[combining macron]m, a = b = c = 0.83 nm) as an oxygen carrier. CuMn2O4 was p...

Blood is a liquid tissue in which dissolved with abundant chemical factors and millions of different cells The reduction of unwanted side effects, especially diseases that emerge through blood such as HIV and hepatitis, has a significant role for modern medicine of transfusion and transplantation. The issues and costs of human blood collection and storage, direct this procedure towards the use ...

The presence of haematin compounds in those animals which have a copper pigment that serves as an oxygen carrier was first observed in 1886 by MacMunn. In 1925, Keilin confirmed MacMunn's observations and found cytochrome in several groups of invertebrates devoid of haemoglobin. In 1940, Ball & Meyerhof, by direct spectroscopic observations, indicated the presence of ironporphyrin compounds in ...

The porous fluorescent SiO2 nanoparticles encapsulating photosensitizer Ru(bpy)3Cl2 were prepared by Stöber method and used as a carrier to immobilize glucose oxidase (GOD) to form the bifunctional porous SiO2 complex nanoparticles (BPSCNp) with the properties of enzymatic catalysis and optical oxygen sensing. The optimal immobilization conditions are as follows: hexadecyltrimethyl ammonium bro...

The formation of NOx from fuel-bound nitrogen is important for the design chemical-looping combustion (CLC) power plants. This work studied to what extent NO and NH3 reacts with perovskite-like oxygen carrier ilmenite under conditions relevant CLC. Based on mass balance calculations, N2 was major outlet N-species in all experiments. More measured at lower temperatures a higher oxidation level c...

A fluidized bed system combining two circulating fluidized bed reactors is proposed and investigated for chemical looping combustion using metal oxides as oxygen carriers. The global solids loop starts in one of the two reactors (primary reactor) where solids are entrained, separated from the gas in a cyclone and sent to the other reactor (secondary reactor) via a fluidized loop seal. From the ...

Polyhemoglobin is formed by the nanobiotechnological assembling of hemoglobin molecules into soluble nanodimension complex. A further step involves the nanobiotechnological assembly of hemoglobin, catalase and superoxide dismutase into a soluble nanodimension complex. This acts both as oxygen carrier and antioxidant to prevent the oxidative effects of hemoglobin. A further step is the preparati...