It started to see some recovery when its usage increased, especially in other parts of the world such as India, Saudi Arabia and Mexico, although Apple’s ad tracking changes alongside a downturn in online advertising in 2022 has led to another stock selloff. ...
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Preparation of ATPS The ATPS was formed by mixing the appropriate weight of the stock solutions of ammonium sulfate, PEG 600 and NaCl in 10 mL graduated centrifuge tubes. 1 mL of crude extract solution (adjusting the crude extract concentration to 15 mg/mL) was added to the ATPS. ...