Joe Dunman's Schoolhouse was the only school in that school community, and it reported a student population of 13 in 1883. Harris County Common School Districts: In 1884, Texas passed the Common School Law, which provided for a system of county schools to be established across the state.
1 9. 2  Disadvantages Of Nanoparticlesï Small size & large surface area can lead to particle aggregation .ï Physical handling of nano particles is difficult in liquid and dry forms.ï Limited drug loading.ï Toxic metabolites may form.3  10. Disadvantages Of Nanoparticlesï Small size & large surface area can lead to particle aggregation .ï Physical handling of nano particles is difficult in liquid and dry forms.ï Limited drug loading.ï Toxic metabolites may form. 2  10.
Size of nanoparticles In terms of diameter, fine particles cover a range between 100 and 2500 nanometers, while ultrafine particles are sized between 1 and 100 nanometers. Nanoparticles may or may not exhibit size-related properties that are seen in fine particles. Despite being the size of the ultrafine particles individual molecules are usually not referred to as nanoparticles. Nanoclusters have at least one dimension between 1 and 10 nanometers and a narrow size distribution.