We report here for the first time that 5 red-tide dinoflagellates (Gymnodinium catenatum, G. impudicum, Lingulodinium polyedrum, Prorocentrum donghaiense, and P. triestinum) which had been previously thought to be exclusively autotrophic dinoflagellates are mixotrophic species. We investigated the feeding behaviors, the kinds of prey species that 11 mixotrophic red-tide dinoflagellates (Akashiwo sanguinea, Alexandrium tamarense, G. catenatum, G. impudicum, Heterocapsa triquetra, L. polyedrum, P. donghaiense, P. micans, P. minimum, P. triestinum, and Scrippsiella trochoidea) fed on, and the effects of the prey concentration on the growth and ingestion rates of P. donghaiense, H. triquetra, P. micans, and L. polyedrum when feeding on algal prey. We have also calculated grazing coefficients by combining field data on abundances of P. donghaiense, H. triquetra, P. micans, and L. polyedrum and co-occurring prey species. All algal predators tested in the present study ingested small phytoplankton species that had equivalent spherical diameters (ESDs) < 12 μm. A. sanguinea and L. polyedrum were able to ingest large phytoplankton species such as H. triquetra, S. trochoidea, and A. tamarense. Prorocentrum spp. fed on prey by engulfing the prey cell through body sutures, while S. trochoidea engulfed prey through the apical horn as well as through the sulcus. Specific growth rates of P. donghaiense, H. triquetra, and P. micans on a cryptophyte and L. polyedrum on P. minimum and S. trochoidea increased with increasing mean prey concentration, with saturation occurring at mean prey concentrations of 110 to 480 ng C ml , respectively. Maximum ingestion rates of P. donghaiense, H. triquetra, and P. micans on the cryptophyte were much lower than those of L. polyedrum on S. trochoidea and P. minimum. The calculated grazing coefficients of P. donghaiense, H. triquetra, and P. micans on the cryptophyte were up to 2.67, 0.091, and 0.041 h

Recycling CO2 as a renewable carbon source for the production of high-value fuels and chemicals has drawn global attention lately as a promising method to mitigate climate change and lessen dependence on fossil fuels. Among the available CO2-recycling options, catalytic CO2 hydrogenation is the most realistic and attractive choice if the hydrogen is produced using a renewable energy source. Depending on the nature of the catalyst, CO2 hydrogenation has distinct reaction pathways, and various value-added hydrocarbons can be produced. Intense research has recently developed high-performance catalysts, identified clear reaction pathways, and deepened the understanding of the reaction mechanisms. In this review, we present an overview of recent key advances in catalytic CO2 hydrogenation to high-value hydrocarbons and oxygenates that have large market sizes, such as formic acid, methanol, methane, and light olefins, as well as liquid fuels, in terms of the catalyst design, catalytic performance, and reaction mechanism. In addition, the current technical challenges and perspectives on CO2 conversion processes are discussed with regard to climate change mitigation.

Simple, low-cost and scalable patterning methods for Cu nanowire (NW)-based flexible transparent conducting electrodes (FTCEs) are essential for the widespread use of Cu NW FTCEs in numerous flexible optoelectronic devices, wearable devices, and electronic skins. In this paper, continuous patterning for Cu NW FTCEs via a combination of selective intense pulsed light (IPL) and roll-to-roll (R2R) wiping process was explored. The development of continuous R2R patterning could be achieved because there was significant difference in adhesion properties between NWs and substrates depending on whether Cu NW coated area was irradiated by IPL or not. Using a custom-built, R2R-based wiping apparatus, it was confirmed that nonirradiated NWs could be clearly removed out without any damage on irradiated NWs strongly adhered to the substrate, resulting in continuous production of low-cost Cu NW FTCE patterns. In addition, the variations in microscale pattern size by varying IPL process parameters/the mask aperture sizes were investigated, and possible factors affecting on developed pattern size were meticulously examined. Finally, the successful implementation of the patterned Cu NW FTCEs into a phosphorescent organic light-emitting diode (PhOLED) and a flexible transparent conductive heater (TCH) were demonstrated, verifying the applicability of the patterned FTCEs. It is believed that our study is the key step toward realizing the practical use of NW FTCEs in various flexible electronic devices.

Oceanic dimethylsulfide (DMS) released to the atmosphere affects the Earth's radiation budget through the production and growth of cloud condensation nuclei over the oceans. However, it is not yet known whether this negative climate feedback mechanism will intensify or weaken in oceans characterized by high CO(2) levels and warm temperatures. To investigate the effects of two emerging environmental threats (ocean acidification and warming) on marine DMS production, we performed a perturbation experiment in a coastal environment. Two sets of CO(2) and temperature conditions (a pCO(2) of ∼900 ppmv at ambient temperature conditions, and a pCO(2) of ∼900 ppmv at a temperature ∼3 °C warmer than ambient) significantly stimulated the grazing rate and the growth rate of heterotrophic dinoflagellates (ubiquitous marine microzooplankton). The increased grazing rate resulted in considerable DMS production. Our results indicate that increased grazing-induced DMS production may occur in high CO(2) oceans in the future.