The colorimetric assay MTT, based on the reduction of the tetrazolium dye (26), measures cell viability and it has been employed to access antiviral activity against different viruses (8, 16, 26, 40).

Graduate Institute of Biotechnology, National Chung Hsing University, Taichung 402, Taiwan Graduate Institute of Genomics and Bioinformatics, National Chung Hsing University, Taichung 402, Taiwan ...

On Monday, Sigma introduced its latest full-frame mirrorless digital camera—the BF—with a radically simple design. Featuring a 24.6 MP full-frame (35mm) sensor, it has just three physical buttons, ...

Following its tiny FP camera from 2019, lens brand Sigma has unveiled the new BF, a mirrorless full-frame affair carved from a single block of aluminum.It's aimed at shooters looking for a simpler ...

Here’s how it works. If you're looking for a lightweight lens that can do everything from super wide-angle landscapes to telephoto wildlife, then the Sigma 16-300mm f3.5-6.7 Contemporary lens could be ...

I've spent the past couple of days at Sigma headquarters and the Sigma factory in Japan, getting intimately acquainted with the new Sigma BF – perhaps the most beautiful camera I've ever seen, and one ...

Sigma has announced the 300-600mm F4 DG OS Sports lens, designed specifically for applications like sports, action and wildlife photography. Recent Videos Optically, the lens is built around 28 ...

It's a compact mirrorless body with a single rear-plate dial and three buttons that provide haptic feedback when pressed. Sigma says the interface has been designed to be simple and "intuitive." Other ...

The Sigma BF features simplified controls on the back, a redesigned user interface, and 230GB of built-in storage. The Sigma BF features simplified controls on the back, a redesigned user ...

Sigma's minimalist BF is machined from a single piece of aluminum It features Sigma's L-mount and a 24MP full-frame sensor with 6K video There's only 230GB of internal storage, and no memory card ...

A factor VIII assay tests for a protein involved in blood clotting. If you produce less of this protein, it may indicate a bleeding disorder. Some people may also have high levels of this ...