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  1. 841
    por Merdes, Andreas
    Publicado 2021
    “…The native γ-tubulin ring complex is an asymmetric, imperfect template for microtubule nucleation. …”
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    Microtubule nucleation without a ring?
  2. 842
    por Choi, Jieun, Yu, Taehwan, Ha, Hyun-Joon
    Publicado 2021
    “…In this study, the highly strained three-membered aziridine ring was successfully activated as the aziridinium ion by alkylation of the ring nitrogen with a methyl, ethyl or allyl group, which was followed by ring opening with external nucleophiles such as acetate and azide. …”
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    Alkylative Aziridine Ring-Opening Reactions
  3. 843
    “…Of all cytoskeletal structures, large-scale actomyosin rings appear to be the most promising cellular elements to accomplish this task. …”
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    Reconstitution of contractile actomyosin rings in vesicles
  4. 844
    “…Here, we focus on a specific network: the unoriented ring. More specifically, we study 1-interval connected dynamic rings (i.e., at any time, at most one of the edges might be missing). …”
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    Compacting oblivious agents on dynamic rings
  5. 845
    “…[Image: see text] Three- and four-membered rings, widespread motifs in nature and medicinal chemistry, have fascinated chemists ever since their discovery. …”
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    Gold-Catalyzed Synthesis of Small Rings
  6. 846
    “…BACKGROUND : Vascular rings (VRs) present with varied symptoms and may result in significant morbidity before an accurate diagnosis is made. …”
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    Prenatal diagnosis of vascular rings and outcome
  7. 847
    “…We have discovered a ring-opening fluorination of bicyclic azaarenes. …”
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    Ring-opening fluorination of bicyclic azaarenes
  8. 848
    “…Amylomaltase is a well-known glucan transferase that can produce large ring cyclodextrins (LR-CDs) or so-called cycloamyloses via cyclization reaction. …”
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    Production of Large-Ring Cyclodextrins by Amylomaltases
  9. 849
    “…Kayser-Fleischer (KF) ring, caused by deposition of excess copper in the Descemet membrane, is a characteristic ocular manifestation of Wilson disease (WD). …”
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    Fading Kayser–Fleischer ring revisited
  10. 850
    por Zhu, Chen, Zhuang, Yiyang
    Publicado 2022
    “…In this article, a new concept of microwave photonic (MWP) fiber ring resonator is introduced. In particular, the complex transmission spectra of the resonator in the microwave domain, including magnitude and phase spectra, are measured and characterized. …”
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    Microwave Photonic Fiber Ring Resonator
  11. 851
    “…Our findings differ partly from previously performed calculations The final result can be interpreted as rings of light seen by the observer. We give a new interpretation to this picture and show that over large distances the effect, albeit rare, could in principle be observable.…”
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    Rings of light caused by gravitational waves
  12. 852
    “…Three tree ring sequences were collected on the soundboard of the Stradivari harp. …”
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    Stradivari harp tree-ring data
  13. 853
    Publicado 1889
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    Intestinal Anastomosis with Segmented Rubber Rings
  14. 854
    “…Throughout the case, the pathognomonic "Ring of Fire" is discussed, as is seen on the transvaginal ultrasound, and its reliability is assessed.…”
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    Ring of Fire: The Case of Mistaken Identity
  15. 855
    por García-Villarreal, Ovidio A.
    Publicado 2022
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    The annuloplasty ring in mitral valve repair
  16. 856
    “…[Image: see text] Many ring polymer systems of physical and biological interest exhibit both pronounced topological effects and nontrivial self-similarity, but the relationship between these two phenomena has not yet been clearly established. …”
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    Random Knotting in Fractal Ring Polymers
  17. 857
    por Kajihara, Yusaku
    Publicado 2022
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    Sclerosing Mesenteritis: “Fat Ring Sign”
  18. 858
    “…Herein, we report their concise preparation from non‐activated polycyclic arenes using a two‐step sequence involving dearomative [4+2]‐cycloaddition with arenophile in combination with palladium‐catalyzed cyclopropanation, followed by cycloreversion‐initiated ring expansion. The described strategy provides a working alternative to the Buchner reaction, which is limited to monocyclic arenes. …”
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    Dearomative Ring Expansion of Polycyclic Arenes
  19. 859
    “…Coding theory where the alphabet is identified with the elements of a ring or a module has become an important research topic over the last 30 years. …”
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    Bounds for Coding Theory over Rings
  20. 860
    por Kuralay, Erkan
    Publicado 2022
    “…The autologous pericardium is used for mitral annuloplasty to allow mitral annular flexibility. Complete mitral ring annuloplasty is done using a D-shaped bovine pericardium. …”
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    Mitral ring annuloplasty by biological material
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