PC-BSD

PC-BSD or PCBSD, is a trademarkedUnix-like, desktop-oriented operating system built upon the most recent releases of FreeBSD. It aims to be easy to install by using a graphical installation program, and easy and ready-to-use immediately by providing KDE SC, LXDE, Xfce, and MATE as the graphical user interface. It provides official binary Nvidia and Intel drivers for hardware acceleration and an optional 3D desktop interface through KWin, and Wine is ready-to-use in running Microsoft Windows software. PC-BSD is able to run Linux software, in addition to FreeBSD ports, and it has its own package management system that allows users to graphically install pre-built software packages from a single downloaded executable file, which is unique for BSD operating systems.

PC-BSD supports ZFS, and the installer offers disk encryption with geli so the system will require a passphrase before booting.

History

PC-BSD was originally founded by FreeBSD professional Kris Moore in early 2005. In August 2006 it was voted the most beginner friendly operating system by OSWeekly.com.

Lead(II) iodide

Lead(II) iodide (PbI₂) or plumbous iodide is a bright yellow solid at room temperature, that reversibly becomes brick red by heating. In its crystalline form it is used as a detector material for high energy photons including x-rays and gamma rays.

Lead iodide is toxic due to its lead content. In the nineteenth century it was used as an artists' pigment under the name Iodine Yellow, but it was too unstable to be useful.

Preparation

Lead iodide can be obtained as a yellow precipitate by reacting solutions of lead(II) nitrate and potassium iodide:

The yellow precipitate dissolves in an excess of KI solution, forming a colourless solution of the tetraiodoplumbate:

Properties

It is sparingly soluble in cold water but quite soluble in hot water, yielding a colorless solution; on cooling it crystallizes as yellow hexagonal platelets.

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PBI

PBI can refer to:

Organizations

Science

Technology