![A general strategy for preparing pyrrolic-N4 type single-atom catalysts via pre-located isolated atoms | Nature Communications A general strategy for preparing pyrrolic-N4 type single-atom catalysts via pre-located isolated atoms | Nature Communications](https://media.springernature.com/full/springer-static/image/art%3A10.1038%2Fs41467-021-27143-5/MediaObjects/41467_2021_27143_Fig1_HTML.png)
A general strategy for preparing pyrrolic-N4 type single-atom catalysts via pre-located isolated atoms | Nature Communications
![Amazon.com: Cry Babies Dragon Fly Pajama for Baby Doll, Purple (Doll Sold Separately) : Toys & Games Amazon.com: Cry Babies Dragon Fly Pajama for Baby Doll, Purple (Doll Sold Separately) : Toys & Games](https://m.media-amazon.com/images/I/91VkXZUd-3L.jpg)
Amazon.com: Cry Babies Dragon Fly Pajama for Baby Doll, Purple (Doll Sold Separately) : Toys & Games
![Amazon.com: Shark Dust-Away Hard Floor Head Attachment with Microfiber Pad for NV750 NV650 NV650W NV651 NV651Q NV652 NV652C NV751 NV752 NV752BRN NV753 NV753C NV755 NV760 NV765 Rotator Lift-Away Vacuum : Home & Amazon.com: Shark Dust-Away Hard Floor Head Attachment with Microfiber Pad for NV750 NV650 NV650W NV651 NV651Q NV652 NV652C NV751 NV752 NV752BRN NV753 NV753C NV755 NV760 NV765 Rotator Lift-Away Vacuum : Home &](https://m.media-amazon.com/images/I/81OZEmg1W1L._AC_UF894,1000_QL80_.jpg)
Amazon.com: Shark Dust-Away Hard Floor Head Attachment with Microfiber Pad for NV750 NV650 NV650W NV651 NV651Q NV652 NV652C NV751 NV752 NV752BRN NV753 NV753C NV755 NV760 NV765 Rotator Lift-Away Vacuum : Home &
![Noble gases and nitrogen in samples of asteroid Ryugu record its volatile sources and recent surface evolution | Science Noble gases and nitrogen in samples of asteroid Ryugu record its volatile sources and recent surface evolution | Science](https://www.science.org/cms/10.1126/science.abo0431/asset/621831e1-a407-4fdc-9f07-3e0f8f16d307/assets/images/large/science.abo0431-fa.jpg)