Abstract. The South China Sea (SCS) is the world's largest marginal sea, playing an important role in regional biogeochemical cycling of carbon and oxygen. However, its overall metabolic balance, primary production rates links to East Asian Monsoon forcing remain poorly constrained. Here, we report seasonal variations triple oxygen isotope composition (17Δ) dissolved O2, a tracer for biological...

The brain produces various reactive oxygen species in enzymatic and non-enzymatic reactions as a by-product of metabolism and/or for redox signaling. Effective antioxidant system the cells maintains balance. However, neurons glia from some regions are more vulnerable to oxidative stress ischemia/reperfusion, epilepsy, neurodegenerative disorders than rest brain. Using fluorescent indicators liv...

The application and development of obstetric Doppler velocimetry provide a basis for the investigation of placental insufficiency and demonstrate the dynamic behavior of fetal circulation during hypoxia. In clinical practice, assessing hemodynamics in three vascular regions involved in pregnancy, namely the uterine, umbilical and middle cerebral arteries, has become routine. Roughly, the cerebr...

The nucleophilic Michael addition of nitroform with acrylamide creates a variety of energetic products. Several interesting compounds with a trinitromethyl group were synthesized, among them salts containing the trinitropropylammonium cation, [(NO2)3CCH2CH2NH3]X. Owing to their positive oxygen balance, the suitability of these compounds as potential high-energy dense oxidizers (HEDOs) in energe...

The understanding of nitric oxide (NO) signaling has grown substantially since the identification of endothelial derived relaxing factor (EDRF). NO has emerged as a ubiquitous signaling molecule involved in diverse physiological and pathological processes. Perhaps the most significant function, independent of EDRF, is that of NO signaling mediated locally in signaling modules rather than relyin...

Up to 0.4 mM 1,3-dimethylbenzene (m-xylene) was rapidly mineralized in a laboratory aquifer column operated in the absence of molecular oxygen with nitrate as an electron acceptor. Under continuous flow conditions, the degradation rate constant (pseudo-first order) was >0.45 h. Based on a carbon mass balance with [ring-C]m-xylene and a calculation of the electron balance, m-xylene was shown to ...

We show here that invertase gene expression and the invertase-sucrose (Suc) synthase ratio decrease abruptly in response to low oxygen in maize root tips. In addition to aiding in the conservation of carbon and possibly ATP, this response has the potential to directly affect sugar signaling relative to carbon flux. Experiments were motivated by the potential for a reduced invertase/Suc synthase...