国产精品视频一区二区三区四,亚洲av美洲av综合av,99国内精品久久久久久久,欧美电影一区二区三区电影

進(jìn)口t-em型雙通道熒光光度計(jì)

可特別設(shè)計(jì)用于細(xì)胞間的鈣或活體細(xì)胞的ph值改變情況，可通過同時(shí)檢測2束不同的熒光發(fā)散光譜強(qiáng)度來實(shí)現(xiàn)。熒光染料被一束激發(fā)光譜所激發(fā)，并同時(shí)制造出2束發(fā)散光譜。其結(jié)果a和b可顯示細(xì)胞的變化。信號比例為a:b或b:a

is specifically designed for the measurement of intracellular calcium or ph changes in live cells through the simultaneous detection of two different fluorescence emission spectra intensities. fluorescent dyes are excited by one excitation spectrum producing simultaneously two emission spectra. the resulting a and b signals indicate changes within the cell. a ratio signal is provided for a:b or b:a.

procedures

static or kinetic analysis

polarization measurements

hplc high pressure liquid chromatography

low pressure liquid chromatography

samples

liquid/continuous flow

applications

medical environmental

clinical agricultural/food

pharmaceutical industrial

forensic oceanography

analytical biochemistry

specifications

range：200-700nm （standard），200-900nm （available）

sensitivity：full scale, 10 picogram quinine, sulfate （10.0ppt） with instrument noise, less than 5% in respect to full scale.

linearity：　+1% of full scale

two digital displays: 000-1999

two recorder signal outputs: 0 to 2 volts

power: 220 vac., 0.8 amp at 50/60 hz.

dimensions wdh: 39.4×44.5×21.6cm, 19.5 kg;

optical system: exclusive seven element quartz optical system focuses excitation energy onto the sample with emmitted fluorescence energy collected and focused to two （2） photomultiplier tubes providing two （2） individual emission channels. excitation and emission filters are placed in collimated （parallel） light paths for optimum filter performance.

optical filters: excitation and emission filter holders are readily accessible to accommodate glass and/or interference filters. filters covering the entire fluorescent spectral range are available.

light source: 100 watt high intensity mercury vapor lamp radiates the full uv and visible spectrum of energy.

photomultiplier tubes: two 200-700nm photomultiplier tubes are standard. extended range （200-900nm） photomultiplier tube is also available.

blank suppression and variable gain: two sets of front panel controls are provided for the suppression of blank fluorescence background to zero and adjustment of full scale signal to a specific number.

display: two independent fluorescent intensity levels are digitally displayed and may be recorded simultaneously with a recorder signal.

ratio output: a ratio signal is provided for a:b or b:a.

note: when used in l rather than t configuration, operation and performance is identical to the model a1 fluorometer.

dual emission fluorometer ordering information

model t-em filter fluorometer

• 100 watt high intensity mercury vapor lamp

• seven element all quartz optical system

• two sets of electronic blank suppression controls

• two sets of sensitivity ranges - .001, .01, .1, 1.0

• two digital displays 000-1999

• two se-lected photomultiplier tubes 200-700 nm

six position excitation aperture wheel

• one excitation and two emission filter holders

• three position carrier for 75 x 10mm round cells

• two output signals for a and b channel＊

• ratio output signal a:b or b:a＊

• 115 vac., 50/60 hz operation

note: 220 vac. operation available upon request

accessories and attachments

round cells

square cells

carriers

adapters

constant temperature assembly

magnetic stirrer

strip chart recorder

fluorometric reference

se-lected photomultiplier tubes

alternate illumination source

hplc flow cell

large volume flow cells

three polarizer filter holder attachments

replacement items