22?
LMS? Issue 6 | 2013
Media & Tissue Culture
Excelsior Lasers
S
pectra-Physics ® introduces the
Excelsior One continuous-wave
(CW) lasers series. This new line of
ultraviolet (UV), visible and nearinfrared (NIR) CW lasers integrates
laser head and controller into a single,
compact package. Available as freespace and fibre-coupled laser configurations, the plug-and-play Excelsior One
series includes 11 different wavelengths
and delivers up to 500mW of average
power. For added convenience, the
integrated lasers utilise only one supply
voltage for all models. They are ideal
for use in flow cytometry, confocal
microscopy and DNA sequencing.
“Featuring true modularity with
an integrated, single footprint across a
broad selection of wavelengths, power
levels and configurations, the Excelsior
One lasers are perfect for customers
who need f lexibility in configuring
their instruments, even for upgrades
or reconf ig urations in the f ield,”
states Jürgen Niederhofer, General
Manager for Spectra-Physics.
The Excelsior One product family
includes direct diode and diodepumped solid-state (DPSS) technology in a consistent compact footprint
with a common electronics interface.
The new platform is based on
Wirsam Scientific
Tel:
011-482?1060 / 021-386?9020 /
031-709-0199 / 041-365?2060 / 016-931?1731
Email: wirsamjb@wirsam.com
Intuitive Dosing Pump
T
he new SIMDOS® 02 FT (full
Teflon®) from KNF Lab has been
specifically developed for the transfer
of aggressive chemicals. To do this, the
SIMDOS 02 FT is fitted with a PTFE
head, a PTFE-covered diaphragm and
chemically resistant FFKM Kalrez®
valves. A Chemraz ®-valve kit
allows the pump to be used
with highly concentrated
acids such as nitric, sulphuric and hydrochloric
acids, and solvents such
as TFH, DMF, DMSO
and MEK. The pump
head is situated outside
t he spla sh-protec ted
IP-65 housing, providing a very signif icant
safety feature.
Also available with
heads in PP or PVDF,
this FT dosing
pump transfers
liquids with a
flow rate of 30µl
to 20ml/min, and
dose volumes of 30µl
up to 999ml. Following
calibration, repeatability is ±1% (full
range) and the pump offers excellent
long-term stability throughout the
entire process. It is safe to run dry and
is self-priming up to 2m. It is effective
against pressures of up to 6bar and
transfers viscous media up to 150 centistokes. The integrated software permits
the transfer parameters to be modified
Spectra-Physics’ It ’s In the Box ™
design, where the laser cavity and
control electronics are integrated into
single, compact housing. All lasers
deliver TEM00 mode quality and very
low optical noise for highest signalto-noise ratio. The DPSS models are
available in single or multi-longitudinal
mode versions. Easy to configure, the
direct diode models include high-speed
modulation and an RS 232 interface. ?
Controlled-rate Freezing
for a range of different viscosities.
Thanks to its neat design and a small
T
hermo Scientif ic ™ Cr yoMed
Freezers provide the ultimate
in controlled-rate freezing flexibility.
Controlled-rate freezers are designed to
keep samples safe during the freezing
process, by moderating the impacts of
footprint, nucleation and heat fluctuations when
the SIMDOS 02 the sample makes the transition from a
FT pump takes up very liquid to a frozen state. These freezers
little laboratory space. are a one-piece freezing system with an
integrated control panel and thermal
The SIMDOS 02 FT features: printer, where multiple freezing profiles
• The F T head/FFK M valves for can be tailored to specific protocols.
There are six standard preset and
aggressive and corrosive liquids
10 user-defined
• Intuitive
freezing prooperation
files, each with
• Fast and
20 steps, which
simple
Labotec
can be modified
calibration
Tel: 011 315 5434
for custom pro• Pause function
Fax: 011 315-5882
tocols. Chamber
without data
Email: sales@labotec.co.za
and sample
loss. ?
temperatures and operation status is
simultaneously displayed on a backlit
LCD, and the dual solenoid valves
increase the LN2 injection volume for
precise temperature c ontrol and accelerated freezing for optimum cell viability.
In addition, a specially designed airhandling system and liquid nitrogen
ring work in tandem for precise temperature control and uniformity. There
is an over-temperature protection on
heating element and audible indicators
alert the operator when the hold time
has elapsed.
An important consideration when
freezing samples for long-term storage
is the proper attention to the type of
vessel, accessories, volume, program
and control. Thermo Scientific has
what they call ‘smart notes’, with useful
information on controlled-rate freezing
and its applications. ?