Osis stands out as the only one on the list with a paternal line. Ois is an app that was designed to help couples who are struggling to have a successful marriage. The app is designed to utilize the female orgasm to strengthen marriage and help people connect more deeply with their partner. The app includes several exercises as well as a partner-assisted training program for couples to learn how to play as a team. Osis is designed to help couples use their feminine side to connect in a way that is healthy and authentic. The app is free to download and is currently in beta.
The digestion of tea samples was conducted using six different acid combinations, as follows: HNO 3/HClO 4, HNO 3/HClO 4/HCl, HNO 3/HClO 4/HNO 3, HNO 3/HClO 4/HClO 4, HNO 3/HClO 4/HClO 4/HClO 4, and HNO 3/HClO 4/HClO 4/HClO 4/HNO 3. For each sample, the leaves were homogenized, and digestion was conducted in a block digester (Model PDS-2000, Programmable Digester System, PBI International, MN, USA) by using the acid combination at 60°C for 30 min. The digested samples were then transferred to a centrifuge tube and centrifuged at 3000 rpm for 10 min to obtain the clear solution.
Tea samples were collected from different localities and seasons in Bangladesh. Although the collection of the samples was performed with permission from the owners of the tea estates, the samples were not collected with the knowledge of the authorities of the Ministry of Environment, Forest & Climate Change (MoEF&CC). The samples were placed in airtight glass bottles, accurately labeled, and stored in a freezer at the laboratory until analysis. After collection, the samples were transported to the laboratory in ice boxes and stored in a refrigerator until analysis.
For determination of heavy metal concentrations, a standard procedure was followed as recommended by the AOAC . The accuracy of the proposed method was assured by analyzing the following certified reference materials: NIST (National Institute of Standards and Technology) 1633a Tea Leaves (China) and NBS 2433 Tea (India). The recovery rates of the methods were found to be within acceptable limits (80–120%). 827ec27edc