Ranolazine: A true pluripotent cardiovascular drug or jack of all trades, master of none? by Alice Mezincescu, V. J. Karthikeyan, Sunil K. Nadar

“…This review article aimed to examine current evidence on the use of ranolazine in various cardiovascular conditions in order to determine whether it is a true pluripotent cardiovascular agent or, on the other hand, a “jack of all trades, master of none.”…”
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Role of C-Reactive protein in COVID-19 pneumonia as “A jack of all trades is a master of none!”: A single-center experience of 2000 cases by Shital Patil, Shubhangi Khule, Deepak Patil, Sham Toshniwal

“…Role of CRP as “a jack of all trades is a master of none” in COVID-19 pneumonia is a real misnomer due to its major impact on guiding step-up and step-down interventions in critical care units. …”
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Claudin Barriers on the Brink: How Conflicting Tissue and Cellular Priorities Drive IBD Pathogenesis by Christopher T. Capaldo

“…By reviewing current studies, the possibility is assessed that with claudins, a jack-of-all-trades is master of none. Potentially, a robust claudin barrier and wound restitution involve conflicting biophysical phenomena, exposing barrier vulnerabilities and a tissue-wide frailty during healing in IBD.…”
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Cooperative behavior between generalists and specialists In homogenous and heterogenous pairings involving leadership in a public goods game by Lee, Beatrice Mynn, Ng, Jocelyn Yu Xuan, Phua, Li Xin

“…Specialists are experts whereby they have in-depth skills and expertise in their few chosen fields whereas generalists are “jacks of all trade, master of none” - they have a broader range of field interests but with less in-depth skills and expertise. …”
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Does an MBA degree advance business management skill or in fact create horizontal and vertical mismatches? by Alam, Gazi Mahabubul, Parvin, Morsheda, Mohd Ayub, Ahmad Fauzi, Kader, Romana, Rahman, Md. Mahfuzur

“…Purpose: An old saying –“Jack of all trades, master of none”– deliberately asserts that the purpose of a master’s degree program is to generate high level job skills in order to improve a nation's economy, while a bachelor degree produces economically productive graduates. …”
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Clear interests and clouded future : force structure and strategy options for the People's Liberation Army Navy (PLAN) by Pickard, Kevin, Jr

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Alcids ‘fly’ at efficient Strouhal numbers in both air and water but vary stroke velocity and angle by Anthony B Lapsansky, Daniel Zatz, Bret W Tobalske

“…Birds that use their wings for ‘flight’ in both air and water are expected to fly poorly in each fluid relative to single-fluid specialists; that is, these jacks-of-all-trades should be the masters of none. Alcids exhibit exceptional dive performance while retaining aerial flight. …”
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