Quantitative characterization of agglomerates and aggregates of pyrogenic and precipitated amorphous silica nanomaterials by transmission electron microscopy

Table 2 Descriptive statistics of silica NM-201

Column	n	Mean	SD	SEM	Max	Min	Median	25%	75%
Area (nm²)	2573	3896	13175	259	420592	35	1021	342	2908
Convex Area (nm²)	2573	6158	21840	430	609588	36	1270	377	4089
Rectangle Max (nm²)	2573	10152	34949	689	898373	52	2039	599	6772
Rectangle Mean (nm²)	2573	9255	32209	634	862557	51	1857	550	6152
Rectangle Min (nm²)	2573	8116	28913	570	826460	46	1638	486	5327
ECD (nm)	2573	50,0	49,5	0,9	731,7	6,7	36,0	20,8	60,8
Feret Max (nm)	2573	77,0	86,0	1,0	1150,0	7,0	51,0	27,0	93,0
Feret Mean (nm)	2573	65,0	71,0	1,0	938,0	7,0	43,0	23,0	79,0
Feret Min (nm)	2573	49,0	55,0	1,0	740,0	4,0	33,0	18,0	59,0
New Radius of Inner Circle (nm)	2573	12,20	7,50	0,10	151,60	2,0	11,0	7,40	15,20
Central Distance Max (nm)	2573	41,7	47,5	0,9	641,9	3,5	26,9	14,2	49,9
Central Distance Mean (nm)	2573	25,8	26,4	0,5	371,8	2,9	18,1	10,3	31,2
Central Distance Min (nm)	2573	8,38	8,90	0,17	200,52	0,03	6,39	3,72	9,98
Diameter Max (nm)	2573	77,0	86,0	1,0	1150,0	7,0	50,0	27,0	93,0
Diameter Mean (nm)	2573	69,0	76,0	1,0	985,0	7,0	45,0	24,0	83,0
Diameter Min (nm)	2573	51,0	57,0	1,0	748,0	4,0	34,0	18,0	61,0
Convex Perimeter (nm)	2573	214	238	4	3139	20	141	75	259
Perimeter (nm)	2573	360	708	13	13479	21	155	76	347
Aspect Ratio	2573	1,529	0,317	0,006	3,388	1,023	1,461	1,296	1,714
Convexity	2573	0,799	0,122	0,002	0,993	0,338	0,812	0,713	0,907
Elongation	2573	1,683	0,457	0,009	4,343	1,000	1,590	1,342	1,924
Shape Factor	2573	0,518	0,259	0,005	1,004	0,013	0,523	0,298	0,747
Sphericity	2573	0,424	0,193	0,003	0,983	0,053	0,395	0,270	0,555

ISSN: 1477-3155