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Cell remote control

24.09.2012

Scientists involved in tissue engineering and testing new drugs often have to sort, rotate, move, and perform numerous other manipulations on individual cells. They have to do this by pushing the cells with a mechanical probe, or literally "persuading" them to move in the right direction with the help of acoustic waves, electric fields or fluid. To work with a single cell, methods of direct physical contact with a high level of accuracy are used. While non-contact methods, although often faster, are less accurate and are suitable mainly for sorting a large number of cells.

Currently, an international team of researchers has developed a cell manipulation method that combines the advantages of both methods, both contact and non-contact.

Scientists place small plates in a micro-fluidic channel and, using magnetic control, begin to move the plate left and right and back and forth. This movement forms a fluid flow that changes its direction relative to the position of the plate and the channel wall, depending on such oscillation characteristics as frequency, amplitude and phase.

Changing these parameters allows researchers to control the flow, such as pulling a cell out of a group, pushing it towards them, or pushing it away, as well as creating microscopic whirlpools to turn the cell around its axis. When the cell reaches the installed plate, the researchers can use the plate itself for direct and precise manipulations.

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Mean Well PSC-160 Security Power Supplies 20.02.2015

Mean Well has expanded its range of power supplies for security systems and low-voltage uninterruptible power systems (UPS) with the PSC-160 series.

The new series of power supplies has an output power of 160 W and has two separate channels for powering the load and charging the battery. The sources are available for two output voltages of 13,8 V (PSC-160A) and 27,6 V (PSC-160B). The voltage on the load channel can be adjusted in the range of 12...15 V/24...29 V, while the battery charge voltage does not change.

The new series of power supplies PSC-160 is available in open frame and in a closed casing. Models with a casing have an additional symbol "C" in the designation, for example PSC-160A-C. Remote control of mains voltage (AC-Ok) and battery status (Bat Low) is carried out using a built-in relay ("dry" contact).

The power supplies are protected against short circuit, overload, overvoltage, deep battery discharge and polarity reversal. The new series of power supplies has power factor correction, is characterized by high efficiency (efficiency up to 90%) and is operable in the input voltage range of 90...264 VAC at an ambient temperature of -20...+70°C under natural convection.

Power supplies of the PSC-160 series are designed for security systems, emergency lighting, alarm systems, access control and low-voltage uninterruptible power systems.

Main technical parameters of PSC-160 series:

- output power: 160 W;
- output voltage: 13,8 V (PSC-160A) and 27.6 V (PSC-160B);
- two separate channels for loading and charging the battery;
- power factor >0,95;
- efficiency up to 90%;
- signaling AC-Ok, Bat Low (relay contacts);
- input voltage range: 90...264 V AC/127...370 V DC;
- working temperature range: -20...+70°С;
- overall dimensions (LxWxH): 152,4x76,2x32 mm / 155,4x85x37 mm (in the casing).

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