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  1. 2561
    “…We show here that transformation of fasamycin into formicamycin metabolites requires two gene products and occurs via a novel two-step ring expansion-ring contraction pathway. Deletion of forX, encoding a flavin dependent monooxygenase, abolished formicamycin production and leads to accumulation of fasamycin E. …”
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    Formicamycin biosynthesis involves a unique reductive ring contraction
  2. 2562
    “…Despite key roles in sister chromatid cohesion and chromosome organization, the mechanism by which cohesin rings are loaded onto DNA is still unknown. Here we combine biochemical approaches and cryoelectron microscopy (cryo-EM) to visualize a cohesin loading intermediate in which DNA is locked between two gates that lead into the cohesin ring. …”
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    A Structure-Based Mechanism for DNA Entry into the Cohesin Ring
  3. 2563
    “…In this paper, we propose using paraxial matrix optics to describe a ring-phase conjugated resonator that includes an intracavity chaos-generating element; this allows the system to behave in phase space as a Bogdanov Map. …”
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    Bogdanov Map for Modelling a Phase-Conjugated Ring Resonator
  4. 2564
    “…Background: Signet ring cell carcinoma (SRCC) is a rare, highly malignant adenocarcinoma that generally involves the stomach; ileal involvement is uncommon. …”
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    Ileal Signet Ring Cell Carcinoma Masked by Crohn Disease
  5. 2565
    “…This study evaluates the biomechanical changes of ecstatic cornea after implantation of two types of intracorneal stromal ring (ICR). METHODS: For doing this prospective cross-sectional study, 32 patients with keratoconus (KCN) were randomly divided into two 16-member groups (group I: MyoRing, group II: KeraRing). …”
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    Intracorneal Stromal Ring Can Affect the Biomechanics of Ectatic Cornea
  6. 2566
    “…A significant amount of work was expanded on the construction of the rhizoxin core macrocycle by ring-closing olefin metathesis (RCM) between C(9) and C(10), either directly or by using relay substrates, but in no case was ring-closure achieved. …”
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    Ring-Closing Metathesis Approaches towards the Total Synthesis of Rhizoxins
  7. 2567
    “…The main application of a ring laser gyroscope is navigation. It is currently the most widely used device for strapdown inertial navigation systems. …”
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    Precision Angle Measurement Systems on the Basis of Ring Laser Gyro
  8. 2568
    “…OBJECTIVES: To identify the incidence of, and variables correlated with, femoral ring allograft (FRA) fracture following anterior lumbar interbody fusion (ALIF). …”
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    Risk Factors Associated With Femoral Ring Allograft Breakage in ALIF
  9. 2569
    “…Penile strangulation with concomitant scrotal entrapment by a steel ring is an extremely rare urological emergency that requires immediate intervention. …”
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    Angle grinder as surgical tool for incarcerated penoscrotal steel ring
  10. 2570
    “…A synthesis of a series of mono-T(8) and difunctionalized double-decker silsesquioxanes bearing substituted triazole ring(s) has been reported within this work. The catalytic protocol for their formation is based on the copper(I)-catalyzed azide-alkyne cycloaddition (CuAAC) process. …”
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    Synthesis of Silsesquioxanes with Substituted Triazole Ring Functionalities and Their Coordination Ability †
  11. 2571
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    Variability of perfusion dark rim artifacts due to Gibbs ringing
  12. 2572
    “…1-Methyl-3,5-dinitro-2-pyridone serves as an excellent substrate for nucleophilic-type ring transformation because of the electron deficiency and presence of a good leaving group. …”
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    Synthesis of Nitroaromatic Compounds via Three-Component Ring Transformations
  13. 2573
    “…Inspired by a recent adaption of Gabidulin codes to certain finite rings by Kamche et al. (IEEE Trans Inf Theory 65(12):7718–7735, 2019), we define and study LRPC codes over Galois rings—a wide class of finite commutative rings. …”
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    Low-rank parity-check codes over Galois rings
  14. 2574
    “…CASE PRESENTATION: We report a 50-year-old female patient with a pathologically diagnosed fibrous meningioma (World Health Organization grade I) that exhibited ring enhancement on MRI. CONCLUSIONS: Meningiomas may rarely present with ring enhancement on MRI. …”
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    Meningioma with ring enhancement on MRI: a rare case report
  15. 2575
    “…Significance: Low-energy pelvic ring fracture patients usually do not qualify for inpatient admission, yet they often require post-acute rehabilitative care. …”
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    Low-Energy Pelvic Ring Fractures: A Care Conundrum
  16. 2576
    “…[Image: see text] We have quantum chemically studied the Lewis acid-catalyzed epoxide ring-opening reaction of cyclohexene epoxide by MeZH (Z = O, S, and NH) using relativistic dispersion-corrected density functional theory. …”
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    How Lewis Acids Catalyze Ring-Openings of Cyclohexene Oxide
  17. 2577
    “…We diagnosed tuberculosis in an illegally wild-captured pet ring-tailed lemur manifesting lethargy, anorexia, and cervical lymphadenopathy. …”
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    Drug-Resistant Tuberculosis in Pet Ring-Tailed Lemur, Madagascar
  18. 2578
    “…The obtained analytical and numerical results for phantom ring and star polymers are compared with the results for linear polymer chains in confined geometries.…”
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    Investigation of Ring and Star Polymers in Confined Geometries: Theory and Simulations
  19. 2579
    “…Purpose: To evaluate how capsular tension rings (CTR) affect refractive outcomes following cataract extraction by phacoemulsification complicated by zonular instability. …”
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    Effect of the capsular tension ring on refractive outcome after phacoemulsification
  20. 2580
    “…The last decade has revealed new roles for Cullin-RING ubiquitin ligases (CRLs) in a myriad of cellular processes, including cell cycle progression. …”
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    Regulation of cell cycle drivers by Cullin-RING ubiquitin ligases
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