, but this code // executes before the first paint, when

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is not yet present. The // classes are added to so styling immediately reflects the current // toolbar state. The classes are removed after the toolbar completes // initialization. const classesToAdd = ['toolbar-loading', 'toolbar-anti-flicker']; if (toolbarState) { const { orientation, hasActiveTab, isFixed, activeTray, activeTabId, isOriented, userButtonMinWidth } = toolbarState; classesToAdd.push( orientation ? `toolbar-` + orientation + `` : 'toolbar-horizontal', ); if (hasActiveTab !== false) { classesToAdd.push('toolbar-tray-open'); } if (isFixed) { classesToAdd.push('toolbar-fixed'); } if (isOriented) { classesToAdd.push('toolbar-oriented'); } if (activeTray) { // These styles are added so the active tab/tray styles are present // immediately instead of "flickering" on as the toolbar initializes. In // instances where a tray is lazy loaded, these styles facilitate the // lazy loaded tray appearing gracefully and without reflow. const styleContent = ` .toolbar-loading #` + activeTabId + ` { background-image: linear-gradient(rgba(255, 255, 255, 0.25) 20%, transparent 200%); } .toolbar-loading #` + activeTabId + `-tray { display: block; box-shadow: -1px 0 5px 2px rgb(0 0 0 / 33%); border-right: 1px solid #aaa; background-color: #f5f5f5; z-index: 0; } .toolbar-loading.toolbar-vertical.toolbar-tray-open #` + activeTabId + `-tray { width: 15rem; height: 100vh; } .toolbar-loading.toolbar-horizontal :not(#` + activeTray + `) > .toolbar-lining {opacity: 0}`; const style = document.createElement('style'); style.textContent = styleContent; style.setAttribute('data-toolbar-anti-flicker-loading', true); document.querySelector('head').appendChild(style); if (userButtonMinWidth) { const userButtonStyle = document.createElement('style'); userButtonStyle.textContent = `#toolbar-item-user {min-width: ` + userButtonMinWidth +`px;}` document.querySelector('head').appendChild(userButtonStyle); } } } document.querySelector('html').classList.add(...classesToAdd); })(); Ronald Blankespoor | 黄大仙高手论坛

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Dr. Ronald Blankespoor

Professor Emeritus

Education

  • BA Dordt College, 1968
  • PhD Iowa State University , 1971

Thesis: "Cyclic Unsaturated Semidiones and Ketyls"
Thesis Advisor: Professor Glen A. Russell

Professional Experience

 

  • Professor of Chemistry, Calvin College, 1977-present; Chair of the Department 1992-95, 2003-2006; Brummel Professor of Chemistry, 2006 - present
  • Research Associate, Centre Nationale de la Recherche, University of Paris, 2001
  • Visiting Professor of Chemistry, University of Paris, 2000
  • Research Associate, Centre Nationale de la Recherche, Aubiere, France, 1991-92
  • Visiting Professor of Chemistry, University of Colorado, 1988
  • Visiting Professor of Chemistry, University of Minnesota, 1983-84
  • Visiting Professor of Chemistry, University of Michigan, 1980, 1982
  • Assistant/Associate Professor of Chemistry, Wake Forest University, 1973-77
  • Assistant Professor of Chemistry, University of Wisconsin-Oshkosh, 1971-73

Research

Highly enantioselective and regioselective substitution reactions using chiral rhodium catalysts

Publications