['Curtain', 'system', 'was', 'installed.', 'The', 'average', 'particulate', 'concentrations', 'measured', 'at', 'these', 'locations', 'were', '.35', 'mg/m?', 'and', '.38', 'mg/m', 'respectively.', 'After', 'the', 'Air', 'Curtain', 'system', 'was', 'installed,', 'plume', 'drift', 'was', 'reduced', 'and', 'the', 'concentrations', 'lowered', 'to', '.18', 'mg/m', 'and', '.25', 'mg/m', 'respectively.', 'Thus,', 'the', 'Air', 'Curtain', 'system', 'reduced', 'undesirable', 'smoke', 'plume', 'drift', 'and', 'reduced', 'the', 'maximum', 'particulate', 'concentration', 'in', 'the', 'smoking', 'section', 'to', '.25', 'mg/ms', '.', 'Figure', '7', 'also', 'shows', 'that', 'the', 'concentration', 'at', 'the', 'ceiling', 'above', 'the', 'smoking', 'machine', 'increased', 'from', '.25', 'mg/m', 'to', '.45', 'mg/m', 'following', 'the', 'Air', 'Curtain', 'installation.', 'This', 'demonstrates', 'the', 'effectiveness', 'of', 'the', 'Air', 'Curtain', 'system', 'in', 'containing', 'the', 'smoke', 'at', 'the', "smoker's", 'table', 'and', 'conveying', 'it', 'out', 'of', 'the', 'breathing', 'zone.', 'TIME-AVERAGED', 'AIR', 'SAMPLES', 'Time-averaged', 'measurements', 'of', 'respirable', 'tobacca', 'smoke', 'at', 'various', 'locations', 'in', 'the', 'restaurant', 'were', 'measured', 'based', 'on', 'the', 'deposition', 'of', 'solanesol', 'on', 'filter', 'media(1).', 'Time-averaged', 'air', 'samples', 'were', 'taken', 'at', 'three', 'locations', 'in', 'the', 'restaurant', 'for', 'two', 'Successive', 'four-day', 'periods.', '(Thursday,', 'Friday', 'and', 'Saturday', 'evenings', 'and', 'on', 'Sunday', 'during', 'lunch).', 'Data', 'collection', 'was', 'interrupted', 'for', 'one', 'week', 'while', 'the', 'air', 'distribution', 'system', 'was', 'modified', 'to', 'the', 'air', 'curtain', 'concept.', 'Additional', 'air', 'samples', 'were', 'taken', 'to', 'two', 'more', 'four-day', 'periads,', 'Air', 'pumps', 'and', 'filters', 'were', 'located', 'in', 'decorative', 'hanging', 'baskets', 'and', 'the', 'air', 'sample', 'tubes', 'were', 'extended', 'to', 'the', 'bottom', 'of', 'the', 'basket.', '(Refer', 'to', 'Figure', '3', 'for', 'the', 'location', 'of', 'the', 'air', 'pups.)', 'This', 'location', 'was', 'within', 'the', 'breathing', 'zone.', 'For', 'each', 'test,', 'air', 'was', 'drawn', 'through', 'filter', 'media', 'for', 'approximately', 'three', 'hours.', 'The', 'filter', 'media', 'was', 'sent', 'to', 'a', 'testing', 'Jab', 'to', 'determine', 'the', 'concentration', 'of', 'solanesal', 'on', 'the', 'filters.', 'Using', 'these', 'results', 'and', 'the', 'fact', 'that', 'tobacco', 'smoke', 'is', 'made', 'up', 'of', '3', 'percent', 'solanesol,', 'the', 'total', 'tobacco', 'smoke', 'concentrations', 'were', 'calculated.', 'TIME-AVERAGED', 'AIR', 'SAMPLE', 'RESULTS', 'Table', '1', 'shows', 'that', 'average', 'tobacco', 'smoke', 'concentrations', 'at', 'each', 'location', 'before', 'and', 'after', 'the', 'Air', 'Curtain', 'system', 'was', 'installed.', 'Also', 'shown', 'are', 'the', 'average', 'smoke', 'concentrations', 'for', 'each', 'location.', 'SAMPLE', 'LOCATION', 'BEFORE', 'AFTER', '.', 'AVERAGE', 'PUMP', 'A', '025', '-046', '-035', 'PUMP', 'B', ':014', '.040', '-027', 'PUMP', 'C', ':005', '-014', '-009', 'Table', '1:', 'Smoke', 'Concentrations', '(mg/m3)', '(1)', 'Ref.', 'M.W.', 'Ogden', 'and', 'P.R.', 'Nelson.', '“Detection', 'of', 'Alkaloids', 'in', 'Environmental', 'Tobacco', 'Smoke”.', 'Modern', 'Methods', 'of', 'Plant', 'Analysis,', 'Vol.', '15', 'Alkaloids.', ' ', 'eeeleecose', ' ', ' ', ' ']