U-series ages of a set of speleothem samples from the two caves near Tangshan Town, Nanjing, determined by thermal ionization mass spectrometry (TIMS), range from older than 500 KaBP to around 20 kaBP. These dated spe...U-series ages of a set of speleothem samples from the two caves near Tangshan Town, Nanjing, determined by thermal ionization mass spectrometry (TIMS), range from older than 500 KaBP to around 20 kaBP. These dated speleothems with unequivocal stratigraphic layers in cave sediments provide basic data to establish a geochronologic sequence for the展开更多
A systematic environmental rock magnetic study of a century-millennial scale loesspaleosol sequence of the last interglacial in the Jiuzhoutai well section, Lanzhou, on the western Loess Plateau demonstrates that Asia...A systematic environmental rock magnetic study of a century-millennial scale loesspaleosol sequence of the last interglacial in the Jiuzhoutai well section, Lanzhou, on the western Loess Plateau demonstrates that Asian summer monsoon experienced fast and large oscillations manifesting as three peaks and two valleys lasling about 1—2 ka. Valley 4 with a central age of 120.5 ka is the most evident, suggesting that summer monsoon was weakened nearly to a level in glaciations. This indicates that summer monsoon has a nature of instability in centurymillennial scale change in the last interglacial.展开更多
The Streptococcus pyogenes CRISPR-Cas9 system effectively mediates RNA-guided DNA double-strand breaks and is used for genome editing in many different organisms, including plants （Puchta, 2016）. CRISPR-Cas9 is a tw...The Streptococcus pyogenes CRISPR-Cas9 system effectively mediates RNA-guided DNA double-strand breaks and is used for genome editing in many different organisms, including plants （Puchta, 2016）. CRISPR-Cas9 is a two-component system in which the Cas9 protein is expressed from a Pol II promoter （Lowder et al., 2015）. In contrast, the sgRNAs are typically expressed from Pol III promoters, such as U6 and U3.展开更多
文摘U-series ages of a set of speleothem samples from the two caves near Tangshan Town, Nanjing, determined by thermal ionization mass spectrometry (TIMS), range from older than 500 KaBP to around 20 kaBP. These dated speleothems with unequivocal stratigraphic layers in cave sediments provide basic data to establish a geochronologic sequence for the
文摘A systematic environmental rock magnetic study of a century-millennial scale loesspaleosol sequence of the last interglacial in the Jiuzhoutai well section, Lanzhou, on the western Loess Plateau demonstrates that Asian summer monsoon experienced fast and large oscillations manifesting as three peaks and two valleys lasling about 1—2 ka. Valley 4 with a central age of 120.5 ka is the most evident, suggesting that summer monsoon was weakened nearly to a level in glaciations. This indicates that summer monsoon has a nature of instability in centurymillennial scale change in the last interglacial.
文摘The Streptococcus pyogenes CRISPR-Cas9 system effectively mediates RNA-guided DNA double-strand breaks and is used for genome editing in many different organisms, including plants （Puchta, 2016）. CRISPR-Cas9 is a two-component system in which the Cas9 protein is expressed from a Pol II promoter （Lowder et al., 2015）. In contrast, the sgRNAs are typically expressed from Pol III promoters, such as U6 and U3.
