sample storage Articles
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Prevention of Sample Deterioration
A series of unconsolidated undrained triaxial compression tests was carried out on specimens of reconstituted kaolin to determine the effects on modulus and strength of two different methods of sample storage after unloading. These results are compared with the values obtained when no unloading occurs, and when unloading is followed immediately by testing. It is seen that use of a simple sample ...
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Energy Efficient Biological Sample Storage
Why do we need Biological Sample Storage?Biological sample storage is essential for several industries including pharmaceuticals, healthcare, research and forensics. Correct sample storage ensures the viability of samples by slowing or stopping degradation of biological materials so that they can be used or investigated for some time after collection, without compromising the sample ...
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Thermal and temporal stability on the enteric viruses infectivity in surface freshwater
The present study aimed to evaluate the stability of Human Adenovirus type 2 (HAdV2) and Murine Norovirus 1 (MNV-1) in surface freshwater samples stored at different temperatures. For HAdV2 the stability decreased with increasing temperatures (−80 > −20 > 4 > 22 °C). The time required to reach one log reduction in viral titers (T90) was similar among all the times and temperatures by ...
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Freezer Racking Solutions for Laboratory Freezers
Have you ever had trouble locating a sample that you need from your lab freezer? Are you struggling to maintain your freezer temperature because of frequent door openings? Freezer racking is the solution. Freezer racks will help you to optimise space, keep track of your samples so they are easily accessible, and hold the freezer temperature more effectively.In this article we will discuss the ...
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Biochemical acidogenic potential in domestic wastewaters: effect of sampling and storage to characterize daily average composite samples
To estimate the expectable enhanced biological phosphorus removal value of a wastewater, the concentration of volatile fatty acids (VFAs) and the biochemical acidogenic potential (BAP) are generally determined on grab samples of wastewater, as these variables are prone to rapid change after sampling. However, such sampling technique do not take into account the variations of these parameters ...
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Ammonia diffusion through Nalophan™ bags
The aim of the work is to verify the diffusion rate of ammonia through the Nalophan™ film that constitutes the sampling bag, considering storage times ranging from 1 to 26 h. The ammonia decay over time was evaluated using gas-chromatography for the quantification of ammonia concentration inside the bag. The research assesses the roles of both of ammonia and water concentration gradients ...
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Marine specimen banking: archive and pollution control for the 21st century
The oceans have in the past been extensively used as disposal sites for various kinds of waste. The world ocean – being the final sink for many natural and anthropogenic substances – is a "labile" ecosystem, which is and has for a long time been the focal point of extensive interdisciplinary research. Measurements of heavy metals and a suite of various chemical compounds in the marine ...
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Laboratory Freezer Maintenance For Low Temperature and ULT Freezers
As such a vital piece of laboratory equipment, it is important to ensure that laboratory freezers are properly maintained to keep them functioning optimally.At Froilabo, we want you to be able to get the best out of your freezer. For this reason we have put together a quick and simple guide with our top tips for laboratory freezer maintenance.Download and print out our Laboratory Freezer ...
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Cryogenic Process and Cryo Storage Solutions from Froilabo
The cryogenic process is a method of freezing and storing samples that involves cooling the temperature of biological materials to stop normal cellular processes and prevent sample degradation for long-term storage. The cryogenic process and cryo storage are ideal solutions for the storage of biological samples and ensuring cell viability over time.Storing a sample under cryogenic conditions ...
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Long-term effect of a simple storage protocol on fluorescence fingerprint of dissolved organic matter
Fitting a pre-established region-specific Parallel Factor Analysis (PARAFAC) model to new dissolved organic matter (DOM) samples has become a popular approach in DOM studies. A key step during the development of the pre-established model is to identify the fluorescence fingerprint, i.e. the number of fluorescent DOM (FDOM) components as well as their excitation and emission spectral features. ...
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4 Top Tips for an Energy Efficient Laboratory Freezer
An energy efficient freezer can make a real difference to your overall laboratory energy consumption.As we all become more conscious of our environmental impact, small changes that we can make to improve our energy efficiency are vital. With various pieces of equipment constantly running, laboratory energy consumption can be very high. Lab users should think carefully about best practices that ...
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Stability of Volatile Sulfur Compounds (VSCs) in sampling bags – impact of temperature
Volatile sulfur compounds (VSCs) are a major component of odorous emissions that can cause annoyance to local populations surrounding wastewater, waste management and agricultural practices. Odour collection and storage using sample bags can result in VSC losses due to sorption and leakage. Stability within 72 hour storage of VSC samples in three sampling bag materials (Tedlar, Mylar, Nalophan) ...
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XZB-C10 Portable Colorimeter
Colorimeter is widely used in different industries such as plastic, printing, paint, textile, dyeing, etc. It measures the sample color value of L*a*b*, L*c*h*, color difference ΔE and ΔLab according to CIE color space. 1. Introduction of XZB-C10 Portable Colorimeter Device sensor exports Japan and information processing chip is from USA, which guarantee the optical signal transfer ...
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Bacteria Preservation with Froilabo
What is Bacteria Preservation?Bacteria preservation is the process of treating and storing bacteria cultures for future use. Preservation of bacteria optimises cell viability for use at a later date, for example in research or diagnostics months or even years after sample collection.Why is Bacteria Preservation Important?If bacteria cultures were stored at room temperature, the cells would ...
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Effect of source water/wastewater quality on bacterial removal during electrocoagulation
Bacterial removal during electrocoagulation (EC) was investigated employing samples from four different water/wastewater sources, namely, greywater, river water, secondary treated sewage and tap water spiked with Escherichia coli. Effects of current density and electrolysis time on the bacterial removal with aluminium electrodes were evaluated. For greywater, river water and secondary treated ...
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Effects of improved storage containers on the bacteriological quality of household drinking water in low-income urban communities in Ibadan, Nigeria
This study assessed the effectiveness of improved storage containers on household drinking water quality in four low-income urban communities in Ibadan, Nigeria. Three hundred randomly selected respondents were interviewed, while 44 households were selected and randomly assigned to four improved container treatment groups: Covered Buckets with Taps (CBT), Covered Buckets without Taps (CB), ...
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Effect of weather condition, packaging material and storage duration on quality of dried tomato slice
The effect of weather condition, packaging material and storage duration on some quality parameters of dried tomato slice was investigated. Dried tomato slice samples each weighing 20 g were packaged in small size pouches made from aluminium foil, polypropylene, high density polyethylene and waxed paper. The packaged samples were placed in airtight glass bottles at the relative humidity levels of ...
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The future of smart meters
The future of smart meters What are the biggest features of smart meters? It is interaction, the information interaction between the user and the power supply bureau. The key lies in convenient and user-friendly management, which requires stronger information processing capabilities of the chip. The future development of electric meters is the direction of modularization, networking and ...
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VialTweeter at UIS250L - Intensive Sonication of Vials
Sonication is a very effective method for the mixing, homogenizing, emulsifying, dispersing, disintegration, and degassing of liquids by means of ultrasonic cavitation. The new Hielscher VialTweeter applies this technology to vials, such as autosampler vials, storage vials and reagent vials without the need to open the cap or any water bath. The VialTweeter replaces the indirect sonication in ...
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Validation of a New Method for Screening Soil and Water for TCE Contamination
INTRODUCTION ASTM Method D 7203-06, Standard Test Method for Screening Trichloroethylene (TCE)-Contaminated Media Using a Heated Diode Sensor, (ASTM 2006) can be used to screen a sample of soil or water known to contain the halogenated volatile organic compound (HVOC) TCE. The method calls for measuring the TCE concentration in the headspace above the sample using a heated diode sensor ...
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