Science - USA (2022-02-04)
MATERIALS SCIENCE Multiscale engineered artificial tooth enamel Hewei Zhao^1 †, Shaojia Liu^1 †, Yan Wei^2 †, Yonghai Yue^1 †, M ...
absorption ( 17 ), which may contribute to im- proved mechanical properties. We evaluated the mechanical performance of ATE by b ...
materials, comparing them with each other and with natural tooth enamel (Fig. 2A and fig. S20). The averageEandHof ATE, calculat ...
evaluated by the so called R-curve effect ( 23 ), enabling us to calculateKjc.Thistypeof toughness for ATE wasKjc=7.4±0.4MPam1/2 ...
SCIENCEscience.org 4 FEBRUARY 2022¥VOL 375 ISSUE 6580 555 Fig. 4. Deformation and failure modes in ATE.(AtoC) SEM images taken f ...
attributed to suppression of the thermal mo- tion of the polymer chains in the presence of more inorganic nanowires ( 27 ); this ...
GREENHOUSEGASES Global assessment of oil and gas methane ultra-emitters T. Lauvaux^1 *, C. Giron^2 , M. Mazzolini^2 , A. dÕAspre ...
558 4 FEBRUARY 2022¥VOL 375 ISSUE 6580 science.orgSCIENCE 1000 km Fig. 1.Global map of ~1200 O&G detections from TROPOMI bet ...
were adjusted according to lack of coverage and hence quantized to 24 hours (supplemen- tary materials). Two additional scenario ...
reduce CH 4 emissions, whereas natural gas production increases steadily by ~3% per year ( 10 ). We evaluate the industry spendi ...
(Fig. 3B). Our valuation of societal costs is much larger than current European Union emissions prices using GWP100 (~$1130 per ...
ATMOSPHERIC CHEMISTRY Nocturnal survival of isoprene linked to formation of upper tropospheric organic aerosol Paul I. Palmer1,2 ...
2550 cm–^1 at a spectral resolution of 1.25 cm–^1 ( 16 ). Here, we report the results from an in- dependent, physically based Cr ...
of“effective”columns is provided in the form of scene-dependent averaging kernels ( 16 ). We describe daytime and nighttime meas ...
suggests that atmospheric isoprene is quickly consumed by OH (with a lifetime of ~1 hour). In pristine environments, where nitro ...
as also indicated by the profiles along this flight track (Fig. 4D). Using the GEOS-Chem model as an intermediary, we find that ...
fig. S2, A to C; and table S1). Insulators are characterized by H3 lysine 4 trimethylation (H3K4me3) and the binding of canonica ...
enhancer-promoter interactions. In contrast to enhancers, DTEs retain an“open”chromatin conformation throughout embryogenesis (f ...
the TAD boundaries across theDfd-Scr-Antp interval (tables S3 and S4). Deletion of theDfd 3 ′insulator causes a wholesale fusion ...
Tethering elements foster appropriate enhancer- promoter interactions, whereas TAD boundaries prevent inappropriate associations ...
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