page_title: Marsha I. Lester
hierarchical_section_title: Marsha I. Lester
caption_attribution_description: English: Photograph of Marsha Lester, chemical physicist, at the Ullyot Public Affairs Lecture, November 18, 2010, Science History Institute, Philadelphia, PA, USA.
context_page_description: Marsha Isack Lester is an American physical chemist. She is currently the Edmund J. Kahn Distinguished Professor of Chemistry at the University of Pennsylvania. Lester uses both theoretical and experimental methods to study the physical chemistry of volatile organic compounds present in the earth's atmosphere. Her current work focuses on the hydroxyl radical and Criegee intermediates.
context_section_description: Marsha Isack Lester is an American physical chemist. She is currently the Edmund J. Kahn Distinguished Professor of Chemistry at the University of Pennsylvania. Lester uses both theoretical and experimental methods to study the physical chemistry of volatile organic compounds present in the earth's atmosphere. Her current work focuses on the hydroxyl radical and Criegee intermediates.
caption: Marsha Lester at the Ullyot Public Affairs Lecture in 2010.
exif: {"Image Make": "Canon", "Image Model": "Canon EOS 5D Mark II", "Image Orientation": "Horizontal (normal)", "Image XResolution": "240", "Image YResolution": "240", "Image ResolutionUnit": "Pixels/Inch", "Image Software": "Adobe Photoshop Elements 7.0 Windows", "Image DateTime": "2013:10:11 13:27:19", "Image Artist": "Conrad Erb", "Image Copyright": "Conrad Erb and Conrad Erb Photography", "Image SensitivityType": "Unknown", "Image CustomRendered": "Normal", "Image ExposureMode": "Manual Exposure", "Image WhiteBalance": "Manual", "Image SceneCaptureType": "Standard", "Image BodySerialNumber": "1020602902", "Image LensSpecification": "[300, 300, 0/0, 0/0]", "Image LensModel": "EF300mm f/2.8L IS USM", "Image ExifOffset": "456", "Thumbnail Compression": "JPEG (old-style)", "Thumbnail XResolution": "72", "Thumbnail YResolution": "72", "Thumbnail ResolutionUnit": "Pixels/Inch", "Thumbnail JPEGInterchangeFormat": "954", "Thumbnail JPEGInterchangeFormatLength": "4915", "EXIF ExposureTime": "1/125", "EXIF FNumber": "4", "EXIF ExposureProgram": "Manual", "EXIF ISOSpeedRatings": "3200", "EXIF ExifVersion": "0221", "EXIF DateTimeOriginal": "2010:11:18 19:09:03", "EXIF DateTimeDigitized": "2010:11:18 19:09:03", "EXIF ShutterSpeedValue": "870723/125000", "EXIF ApertureValue": "4", "EXIF ExposureBiasValue": "0", "EXIF MaxApertureValue": "3", "EXIF SubjectDistance": "113/10", "EXIF MeteringMode": "Pattern", "EXIF Flash": "Flash did not fire, compulsory flash mode", "EXIF FocalLength": "300", "EXIF SubSecTimeOriginal": "50", "EXIF SubSecTimeDigitized": "50", "EXIF ColorSpace": "sRGB", "EXIF ExifImageWidth": "358", "EXIF ExifImageLength": "454", "EXIF FocalPlaneXResolution": "5616000/1459", "EXIF FocalPlaneYResolution": "1872000/479", "EXIF FocalPlaneResolutionUnit": "2"}