The researchers did not have access to a biosafety level (BSL) 4 laboratory necessary to test that with the real Ebola virus, so they engineered harmless "pseudotyped" viruses that contained the gene for the surface protein in both its ancestral and mutated form.
"Unnecessary", I thought, was a poor adjective because it implies that some amount of animal suffering in laboratories is "necessary", which is far from the truth, and 2013 provided a mountain of evidence to expose this myth.
The aim of this work is to investigate the degradation of urinary glycosaminoglycans (GAGs) at different storage temperatures, in order to identify whether frozen transportation to reference laboratories is necessary.
Furthermore, laboratory guidelines or policies leading to more standardized assay performance between different laboratories are necessary for combining data from different sites to estimate vaccine effectiveness or compare infection burden at various geographic regions.
The fact that assessment of urine albumin scored lower than other laboratory assessments may well be due to patients not always supplying urine samples to the laboratory when necessary.
The Food and Drug Administration, which said it "will be unable to support the majority of its food safety, nutrition, and cosmetics activities," and would have to halt "the majority of the laboratory research necessary to inform public health decision-making".
In order to analyze the data of these missions, simulations in the laboratory are necessary.
During sampling analysis and transportation of water samples to the laboratory, all necessary precautions were taken (Brown et al. 1974).
The paper describes a method of laboratory tests necessary for identifying the mechanical properties of polyester coated fabrics named Precontraint 1202S with PVDF surface treatment.
In this paper, laboratory tests necessary for the identification of non-linear elastic immediate properties of the PVC coated polyester fabric (like AF 9032) are described.
