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10pcs TSOP1838 Infrared receiver 38Khz Infrared sensor $14.99 |
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Infrared PIR Auto Sensor LED Lamp Motion Detector $6.49 |
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60 Degree 5mm 48-LED IR Infrared Board for CCTV Camera $7.45 |
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Unusual IR LED Flashlight INFRARED 4″ 3AAAs USA Seller $19.98 |
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1pc 1w 850nm Infrared IR LED 1 Watt $6.99 |
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1pc 1w 940nm Infrared IR LED 1 Watt $6.99 |
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1pc 3w 850nm Infrared IR LED 3 Watt $9.99 |
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1pc 3w 940nm Infrared IR LED 3 Watt $9.99 |
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1pc 5w 850nm Infrared IR LED 5 Watt $14.99 |
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1pc 5w 940nm Infrared IR LED 5 Watt $14.99 |
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5W Infrared IR LED 850nm + 80° Lens For Night Vision IR Camera $7.99 |
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Infrared Light 30 LED Night Vision IR Illuminator Lamp $29.26 |
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24 LED IR Infrared AUTO ON OFF 4-8m Operation Range Sensor Detector Light Bulb $8.75 |
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3.5 CH Infrared IR RC Radio LED Light Helicopter Aircraft Toy Remote Controller $55.75 |
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10W RGB Led Bulb Flood Lamp Light + Infra-red IR Remote Controller $29.99 |
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20 pcs 5mm 850nm Infrared IR LED & Free Resistor $3.99 |
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20 pcs 5mm 940nm Infrared IR LED & Free Resistor $3.99 |
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4 LED Battery Operated IR Infrared Motion Sensor Home Indoor Lighting Light Lamp $5.50 |
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45 LED IR Infrared AUTO ON OFF 3-8m Operation Range Sensor Detector Light Bulb $11.30 |
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4LED Wireless IR Infrared Motion Sensor Bedroom Kitchen Wardobe Night Light Lamp $5.50 |
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6 LED Battery Operated IR Infrared Motion Sensor Home Indoor Lighting Light Lamp $7.35 |
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6LED IR Infrared Motion Sensor Wireless Bedroom Kitchen Wardobe Night Light Lamp $7.20 |
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8 LED Battery Operated IR Infrared Motion Sensor Home Indoor Lighting Light Lamp $7.35 |
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Automatic Soap Cleaner Sanitizer Dispenser Touch Free Infrared Sensor Detect LED $14.25 |
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200 pcs 5mm 850nm Infrared IR LED & Free Resistor $13.99 |
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200 pcs 5mm 940nm Infrared IR LED & Free Resistor $13.99 |
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200pcs 5mm 940nm IR detector sensor Infrared Phototransistor $16.99 |
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36-LED Bulbs CCTV Camera IR Infrared Illuminator Board $14.68 |
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Color CCD Infrared IR Dome Security Camera w 48 LEDs $35.32 |
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ML411 Infrared Cameras with 480 TVL 30 IR LEDs 8mm fix $65.00 |
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6mm Lens 32 LEDs Infrared Colored Video CCTV CCD Camera $41.89 |
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Handsfree Soap Cleaner Sanitizer Dispenser Touch Free Infrared Sensor Detect LED $14.25 |
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Home Wall Corridor 4 LED Infrared Motion Detector Cordless Lamp Night Light new $5.50 |
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Home Wall Corridor 4 LED IR Infrared Motion Detector Cordless Lamp Night Light $6.40 |
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Home Wall Corridor 6 LED IR Infrared Motion Detector Cordless Lamp Night Light $7.20 |
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Home Wall Corridor 8 LED IR Infrared Motion Detector Cordless Lamp Night Light $7.35 |
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Infrared PIR Auto Sensor 6 LED Light Lamp Motion Detector Energy Saving New $7.97 |
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IR Sensor Light Lamp 4 LED Auto PIR Infrared Wireless Keyhole Motion Detection $5.50 |
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Torch Shape Spy Camera DVR IR LED Mini DV Camcorder 8* Infra Red LEDs $35.99 |
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18 LEDs Infrared Lamp Board IR for CCTV Dome Camera $6.46 |
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Mini Travel Safety Alarm with PIR Passive Infrared Sensor & LED Flashlight $19.99 |
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20pcs TSOP1838 Infrared receiver 38Khz Infrared sensor $23.99 |
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CCTV Camera 10mm 30-LED Lamp Infrared Plate IR Board $13.81 |
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25 CX20106A IR RECEIVER for Infrared remote control $23.00 |
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2pcs TSOP1838 Infrared receiver 38Khz Infrared sensor $4.99 |
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36-LED Infrared Bulb 60 Degree IR Board for CCTV Camera $10.86 |
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36-LED Infrared Bulb 60 Degree IR Board for CCTV Camera $7.16 |
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60 Degree 5mm 48-LED IR Infrared Board for CCTV Camera $7.22 |
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Purple Shell 36 LEDs 1/4″ PAL Infrared CCD Color Camera $40.10 |
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50 pcs 5mm 850nm Infrared IR LED & Free Resistor $4.99 |
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50 pcs 5mm 940nm Infrared IR LED & Free Resistor $4.99 |
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500 pcs 5mm 850nm Infrared IR LED & Free Resistor $29.99 |
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500 pcs 5mm 940nm Infrared IR LED & Free Resistor $29.99 |
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5000 pcs 5mm 850nm Infrared IR LED & Free Resistor $259.99 |
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5000 pcs 5mm 940nm Infrared IR LED & Free Resistor $259.99 |
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CREE IR NVG Infrared LED Spare Bulb for Ultrafire 501B 502B C1 solarforce 6P G2 $15.88 |
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CREE IR NVG Infrared LED Spare Bulb for Ultrafire 501B 502B C1 solarforce 6P G2 $15.88 |
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CCTV Security Camera 5mm 24-LED Bulbs IR Infrared Board $5.92 |
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500pcs 5mm 940nm IR detector sensor Infrared Phototransistor $39.99 |
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6mm Lens 24 LED Infrared Color CCD Conch Camera Black $38.86 |
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TSAL5100, IR Emitting Diode 940nm Infrared GaAs Qty 20 $16.99 |
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TSAL5100, IR Emitting Diode 940nm Infrared GaAs Qty 40 $29.99 |
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TSAL5300, IR Emitting Diode 940nm Infrared GaAs Qty 20 $16.99 |
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TSAL5300, IR Emitting Diode 940nm Infrared GaAs Qty 40 $29.99 |
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TSFF5210, IR Emitting Diode 870nm Infrared GaAlAs (10) $12.99 |
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TSFF5210, IR Emitting Diode 870nm Infrared GaAlAs (20) $20.99 |
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TSFF5410, IR Emitting Diode 870nm Infrared GaAlAs (5) $12.99 |
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TSFF5410, IR Emitting Diode 870nm Infrared GaAlAs (10) $21.99 |
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TSHG6200, IR Emitting Diode 850nm Infrared GaAlAs (10) $15.99 |
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50pcs 5mm 940nm IR detector sensor Infrared Phototransistor $6.99 |
Faster way to probe proteins (MIT)
Proteins can take many different shapes, and those shapes help determine each
protein’s function. Analyzing those structures can tell scientists a great
deal about how a protein behaves, but many of the methods now used to study
structure require proteins to be crystallized or otherwise altered from their
natural state.
Now, MIT researchers have developed a way to analyze proteins that doesn’t
require any pre-treatment. The technique is also extremely fast, allowing
scientists to see, for the first time, how a protein changes its shape over
picoseconds, or trillionths of a second.
The researchers, led by chemistry professor Andrei Tokmakoff and postdoc
Carlos Baiz, describe their new technique this month in the journal _Analyst_.
Their approach builds on a technology known as two-dimensional infrared
spectroscopy, which works by shining pulses of infrared light on a molecule
and measuring the resulting molecular vibrations. In the new paper, the
researchers came up with a way to analyze that data and correlate it with
common structural elements found in proteins.
Once assembled, proteins tend to fold into one of two secondary structures,
known as alpha helices and beta pleated sheets. In this study, the researchers
distinguished between those two structures by …
