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

Table 4 Descriptive statistics of silica NM-203

Column	n	Mean	SD	SEM	Max	Min	Median	25%	75%
Area (nm²)	4889	3426	8413	120	161619	35	928	362	2740
Convex Area (nm²)	4889	6467	19253	275	454517	37	1314	450	4243
Rectangle Max (nm²)	4889	11063	33198	474	741224	56	2180	740	7163
Rectangle Mean (nm²)	4889	9987	29909	427	692283	53	2001	673	6474
Rectangle Min (nm²)	4889	8598	25731	368	611812	42	1734	597	5586
ECD (nm)	4889	48,5	44,7	0,6	453,6	6,7	34,3	21,4	59,0
Feret Max (nm)	4889	83,0	90,0	1,0	986,0	7,0	53,0	31,0	98,0
Feret Mean (nm)	4889	69,0	74,0	1,0	838,0	7,0	45,0	26,0	81,0
Feret Min (nm)	4889	51,0	54,4	0,7	641,1	4,9	33,5	19,7	60,2
New Radius of Inner Circle (nm)	4889	10,03	5,26	0,07	48,75	1,49	9,27	6,28	12,26
Central Distance Max (nm)	4889	44,7	49,5	0,7	531,1	3,6	28,3	16,4	52,8
Central Distance Mean (nm)	4889	26,1	26,1	0,3	277,2	3,0	17,6	10,9	31,2
Central Distance Min (nm)	4889	6,10	5,96	0,08	76,76	0,02	4,48	2,48	7,60
Diameter Max (nm)	4889	83,0	90,0	1,0	986,0	7,0	53,0	31,0	98,0
Diameter Mean (nm)	4889	73,0	80,0	1,0	880,0	7,0	47,0	27,0	87,0
Diameter Min (nm)	4889	53,3	57,3	0,8	678,8	4,0	34,9	20,3	62,7
Convex Perimeter (nm)	4889	226	245	3	2818	21	147	84	266
Perimeter (nm)	4889	439	839	12	18139	21	182	91	411
Aspect Ratio	4889	1,599	0,357	0,005	3,565	1,039	1,533	1,328	1,794
Convexity	4889	0,717	0,135	0,001	1,000	0,331	0,722	0,622	0,822
Elongation	4889	1,810	0,536	0,007	5,008	1,000	1,700	1,408	2,095
Shape Factor	4889	0,384	0,234	0,003	0,991	0,006	0,354	0,190	0,554
Sphericity	4889	0,379	0,190	0,002	0,981	0,039	0,346	0,228	0,504

ISSN: 1477-3155