Under the condition where a hydrophilic monomer was added, hollow microspheres were formed when polymerization in the secondary nuclei was dominant, while one-hole microspheres resulted when polymerization occurred only inside the larger monomer droplets, indicating that the compromise between dominant mechanisms is critical to the polymerization process.
If the Cu2O nanolayers rolled up immediately after hydrazine was added, hollow sphere morphology usually formed.
For obtaining the ultrafine magnetic hollow silica NPs, we added hollow magnetite NPs (ca. 100 nm) in the previous process (Fig. 1).
Leave a hole where you want the door to be and add a hollow stick, reed, or piece of bamboos to make a chimney.
For synthesis of magnetic hollow SiO2NPs, 100 mg hollow magnetite NPs dissolved in 5-mL double distilled water and ultrasonic dispersing 5 min. CTAB of 0.2 g was dissolve in 96-mL double distilled water, and then added the hollow magnetite NPs, the mixture was stirred at rate of ca. 600 rpm and kept 10 min at room temperature, and we obtained the color mixture.
In a statement, the United States-based group Bishopaccountability.org, which tracks abuse cases, said the pontiff's words "ring hollow," adding that he had said similar things for years with little action.
He also said he believed that Saudi Arabia's threat to pull its assets, a concern of the administration, was "hollow," adding, "It will hurt them a lot more than it hurts us".
Yuval Levin and Ramesh Ponnuru write in National Review that Republicans "need to realize that without... an alternative their objections to Obamacare will ring increasingly hollow," adding, "Even though they cannot become law for at least four years, such ideas must become Republican orthodoxy if the party is plausibly to call for repeal".
He adds: "The hollowing out of the heartland was good for the company's bottom line".
Add the hollowed-out aubergines, squash and onions and start to colour them all over – this should take about 4 minutes.
