Recovery Observations from Alkali, Nanoparticles and Polymer Flooding as Combined Processes.

We have studied wettability alterations through imbibition/flooding and their synergy with interfacial tension (IFT) for alkalis, nanoparticles and polymers. Thus, the total acid number (TAN) of oil may determine the wetting-state of the reservoir and influence recovery and IFT. Data obtained demonstrate how the oil TAN number (low and high), chemical agent and reservoir mineralogy influence fluid-fluid and rock-fluid interactions.

A baculovirus photolyase with DNA repair activity and circadian clock regulatory function.

Cryptochromes and photolyases belong to the same family of flavoproteins but, despite being structurally conserved, display distinct functions. Photolyases use visible light to repair ultraviolet-induced DNA damage. Cryptochromes, however, function as blue-light receptors, circadian photoreceptors, or repressors of the CLOCK/BMAL1 heterodimer, the transcription activator controlling the molecular circadian clock.

The Potorous CPD photolyase rescues a cryptochrome-deficient mammalian circadian clock.

Despite the sequence and structural conservation between cryptochromes and photolyases, members of the cryptochrome/photolyase (flavo)protein family, their functions are divergent. Whereas photolyases are DNA repair enzymes that use visible light to lesion-specifically remove UV-induced DNA damage, cryptochromes act as photoreceptors and circadian clock proteins. To address the functional diversity of cryptochromes and photolyases, we investigated the effect of ectopically expressed Arabidopsis thaliana (6-4)PP photolyase and Potorous tridactylus CPD-photolyase (close and distant relatives of mammalian cryptochromes, respectively), on the performance of the mammalian cryptochromes in the mammalian circadian clock.

[Fetal pulmonary artery blood flow valuation in pregnancies complicated by oligohydramnios].

Objectives: The objective of the study was to estimate selected Fetal Pulmonary Artery blood flow parameters in pregnancies complicated by oligohydramnios in relation to normal pregnancies.

Materials And Methods: A total of 52 patients between 26 and 39 weeks of pregnancy complicated by oligohydramnios due to: placental insufficiency, PROM or idiopathic etiology and 69 normal pregnancies were involved in the study. Ultrasound examination using color and pulse Doppler were made.