OBJECTIVE To investigate the prevalence of detectable jugular lymphatic sacs in a setting for first trimester screening for Down syndrome, and to evaluate the influence of jugular lymphatic sacs on the screening performance for chromosomal abnormalities. METHODS A prospective single center study (Erasmus University Medical Center, Rotterdam, The Netherlands) over a period of one year (January...

The long-unresolved issue of CO2 release and the resulting atmospheric change can be solved through application effective catalysts. Thus, single-atom catalysts (SACs) have been rapidly developed for reduction reaction (CO2RR), as they show improved catalytic metrics enable generation C2+ products. Among numerous novel SACs, such those based on graphene, metal–organic frameworks, covalent organ...

Many microorganisms synthesize a wide range of surface active compounds (SACs), classified according to their molecular weights, properties and localizations. The low molecular weight SACs or biosurfactants lower the surface tension at the air/water interfaces and the interfacial tension at oil/water interfaces, whereas the high molecular weight SACs, also known as bioemulsifiers, are more effe...

The purpose of this article was to evaluate the accuracy of predicting amnionicity using the number of yolk sacs by diagnostic ultrasound examination in monochorionic (MC) multifetal pregnancies between 7 + 0 and 9 + 6 gestational weeks. A total of 97 patients with MC multifetal pregnancies underwent early ultrasound examination from 2004 to 2014 at Cheil General Hospital and Women's Healthcare...

Non-precious metal single-atom catalysts (NPM-SACs) with unique electronic structures and coordination environments have gained much attention in electrocatalysis owing to their low cost, high atomic utilization, performance. NPM-SACs on carbon support (NPM-SACs/CS) are promising because of the substrate a large surface area, excellent electrical conductivity, chemical stability...

The emergence of single atom sites as a frontier research area in catalysis has sparked extensive academic and industrial interest, especially for energy, environmental chemicals production processes. Single catalysts (SACs) have shown remarkable performance variety catalytic reactions, demonstrating high selectivity to the products long lifespan, stability more importantly atomic metal utiliza...

The unique structures of single-atom catalysts (SACs) endow them with widespread energy applications. This review summarized the achievements multifarious synchrotron-radiation characterization methods in studying local environments SACs.

This paper investigates an idea that was put forward (and hinted at in Fitch, 2000) by Tecumseh Fitch at the Cradle of Language conference in Stellenbosch, South Africa. The idea is that air sacs may have played an important role in early hominid vocalizations. Many other primates have air sacs, notably chimpanzees, gorillas and orangutans. It is therefore likely that our latest common ancestor...

—The vertebrae of sauropod dinosaurs are characterized by complex architecture involving laminae, fossae, and internal chambers of various shapes and sizes. These structures are interpreted as osteological correlates of a system of air sacs and pneumatic diverticula similar to that of birds. In extant birds, diverticula of the cervical air sacs pneumatize the cervical and anterior thoracic vert...