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New routes towards azomethine ylide generation from prolines to synthesize diverse -heterocycles: a DFT supported -selective mechanism.
Org Biomol Chem
September 2024
Department of Chemistry, University of Calcutta, 92 A. P. C. Road, Kolkata-700009, India.
Azomethine ylides are generated using either organocatalysts or metal catalysts a ballet of decarboxylative C-N coupling choreographed by prolines. These strategies enable diastereoselective [3 + 2] cycloaddition, C-C coupling, and ring annulation, providing sustainable routes. The synthesized pyrrolizines and other heterocycles have potential applications in the development of crucial biomolecules and pharmaceuticals.
View Article and Find Full Text PDFA Radiological Evaluation of Bone Healing in Postextraction Sockets Following Bone Grafting Using Beta-Tricalcium Phosphate and Calcium Phosphosilicate: A Controlled Comparative Study.
J Pharm Bioallied Sci
November 2021
Department of Oral and Maxillofacial Surgery, Rampurhat Government Medical College and Hospital, Government of W.B, Rampurhat, West Bengal, India.
Background: Healing unbinds a well choreographed array of cellular, physiologic, biochemical, and molecular processes directed toward restoring the integrity and functional capacity of the damaged structures. The rate and degree of healing vary among individuals but is greatest during the first few months or years after tooth loss. Evidence suggests that alveolar bone ridge resorption may be prevented, initially by reconstructive surgical techniques using several materials which are employed at the time of extraction.
View Article and Find Full Text PDFThe Community Health Systems Reform Cycle: Strengthening the Integration of Community Health Worker Programs Through an Institutional Reform Perspective.
Glob Health Sci Pract
March 2021
U.S. Agency for International Development, Washington, DC, USA.
To develop guidance for governments and partners seeking to scale community health worker programs, we developed a conceptual framework, collected observations from the scale-up efforts of 7 countries, workshopped the framework with technical groups and with country stakeholders, and reviewed literature in the areas of health and policy reform, change management, institutional development, health systems, and advocacy. We observed that successful scale-up is a complex process of institutional reform. Successful scale-up: (1) depends on a carefully choreographed, problem-driven political process; (2) requires that scaled program models are drawn from solutions that are available in a given health system context and aligned with the resources, capabilities, and commitments of key health sector stakeholders; and (3) emerges from iterative cycles of learning and improvement, rather than a single, linear scale-up effort.
View Article and Find Full Text PDFPatterned progression of bacterial populations in the premature infant gut.
Proc Natl Acad Sci U S A
August 2014
Pediatrics and
In the weeks after birth, the gut acquires a nascent microbiome, and starts its transition to bacterial population equilibrium. This early-in-life microbial population quite likely influences later-in-life host biology. However, we know little about the governance of community development: does the gut serve as a passive incubator where the first organisms randomly encountered gain entry and predominate, or is there an orderly progression of members joining the community of bacteria? We used fine interval enumeration of microbes in stools from multiple subjects to answer this question.
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