A suspension weighing technique for the rapid determination of specific gravity of eggs

1969 ◽  
Vol 9 (37) ◽  
pp. 131 ◽  
Author(s):  
RAE Pym
Keyword(s):  
Specific Gravity ◽  
Breaking Strength ◽  
Rapid Determination ◽  
White Leghorn ◽  
Salt Solutions ◽  
Egg Weight ◽  
Closed Population ◽  
Impact Device ◽  
The Impact

A suspension weighing technique, developed for the rapid determination of the specific gravity of eggs, is described and compared with one using salt solutions of known density. A simple impact device was used to determine shell strength for correlation with the results of specific gravity determinations. Eggs were obtained from three strains of domestic fowl : White Leghorn, .Australorp, and Synthetic (a closed population in its eighth generation originally based on White Leghorn-Australorp crosses). The numbers of eggs examined in one hour by suspension weighing, salt solutions, and the impact device were 400, 200, and 100 respectively. Repeatabilities of specific gravity based on three eggs per hen were slightly higher for suspension weighing than for salt solutions. Correlations between specific gravity and breaking strength ranged from +0.72 to +0.78 for the three strains. Correlations between egg weight and specific gravity and between egg weight and breaking strength were effectively zero. It is concluded that for routine work, measurement of specific gravity by suspension weighing is a reliable and rapid method of estimating shell strength.

scholarly journals The rapid determination of carcass fat by the Foss-Let specific gravity technique

1976 ◽  
Vol 36 (3) ◽  
pp. 567-570 ◽  
Author(s):  
C. J. H. Woodward ◽  
P. Trayhurn ◽  
W. P. T. James
Keyword(s):  
Specific Gravity ◽  
Rapid Determination ◽  
Reference Method ◽  
New Method ◽  
Storage Lipid ◽  
Structural Lipid ◽  
Nutritional Studies

1. Carcass fat was determined by extraction with tetrachloroethylene and measurement of the solvent's change in density. The results were comparable in precision to those of a reference method; the new method extracted storage lipid but little structural lipid.2. The technique is simple, rapid and appropriate for many nutritional studies.

scholarly journals A Simple and Reliable Strategy for BK Virus Subtyping and Subgrouping

2017 ◽  
Vol 55 (4) ◽  
pp. 1177-1185 ◽  
Author(s):  
Virginie Morel ◽  
Elodie Martin ◽  
Catherine François ◽  
François Helle ◽  
Justine Faucher ◽  
...  
Keyword(s):  
Phylogenetic Trees ◽  
Rapid Determination ◽  
Bk Virus ◽  
Transplant Recipients ◽  
Associated Diseases ◽  
Viral Subtype ◽  
Subtype Identification ◽  
One Step ◽  
The Impact

ABSTRACT BK virus (BKV)-associated diseases in transplant recipients are an emerging issue. However, identification of the various BK virus subtypes/subgroups is a long and delicate process on the basis of currently available data. Therefore, we wanted to define a simple and effective one-step strategy for characterizing all BK virus strains from the VP1 gene sequence. Based on the analysis of 199 available complete DNA VP1 sequences, phylogenetic trees, alignments, and isolated polymorphisms were used to define an effective strategy for distinguishing the 12 different BK virus subtypes/subgroups. Based on the 12 subtypes identified from the 199 complete BKV VP1 sequences (1,089 bp), 60 mutations that can be used to differentiate these various subtypes/subgroups were identified. Some genomic areas were more variable and comprised mutational hot spots. From a subregion of only 100 bp in the VP1 region (1977 through 2076), we therefore constructed an algorithm that enabled rapid determination of all BKV subtypes/subgroups with 99% agreement (197/199) relative to the complete VP1 sequence. We called this domain of the BK viral genome the BK typing and grouping region (BKTGR). Finally, we validated our viral subtype identification process in a population of 100 transplant recipients with 100% efficiency. The new simpler method of BKV subtyping/subgrouping reported here constitutes a useful tool for future studies that will help us to more clearly understand the impact of BKV subtypes/subgroups on diagnosis, infection, and BK virus-associated diseases.

Method for Rapid Determination of Specific Gravity

1940 ◽  
Vol 1 (2) ◽  
pp. 149-152 ◽  
Author(s):  
C. F. JACOBSEN ◽  
K. LINDERSTRØM-LANG
Keyword(s):  
Specific Gravity ◽  
Rapid Determination

Network analysis of the RASFF database: a mycotoxin perspective

2011 ◽  
Vol 4 (3) ◽  
pp. 329-338 ◽  
Author(s):  
A. Petroczi ◽  
T. Nepusz ◽  
G. Taylor ◽  
D. Naughton
Keyword(s):  
Network Analysis ◽  
Rapid Determination ◽  
Descriptive Statistics ◽  
Assessment Period ◽  
Food And Feed ◽  
Emerging Issues ◽  
Safe Food ◽  
User Friendly ◽  
The Impact

Analysis of the Rapid Alert System for Food and Feed (RASFF) provides useful trend analyses such as identification of transgressor and detector nations, and determination of seasonal variations in contamination patterns. This approach may inform a nation's testing regimes along with trade intelligence to secure safe food supplies. The aim of this investigation was to explore the use of descriptive statistics coupled to network analysis to provide a user friendly approach to allow interrogation of the RASFF database. Categorisation of notifications by contaminant type reveals that some 30% of all notifications are generated owing to mycotoxins with aflatoxins being the major contributor. In the period between January 2008 and October 2010, the order of nations reported for mycotoxin contamination appeared in the order Turkey, China, Iran and USA. Network analysis allows rapid determination of trends in the RASFF database as each contaminant type can be filtered to focus on nations acting as transgressors and detectors. In addition, the impact of each nation can be assigned as the network tool incorporates a consideration of frequency counts as well as number of countries involved. This approach rapidly identifies the key detectors and transgressors, confirming Turkey, China and Iran as key transgressor nations for mycotoxins. Changes over time, during the assessment period, reveal that Iran is improving in the longer term in contrast to Turkey and China where further remedial action is warranted. In summary, a network tool has several advantages over descriptive statistics. It can rapidly identify trends in detector and transgressor nations for each category of contaminant. It can also provide an impact score for each nation providing weekly updates to help identify emerging issues either as nations and/or contaminant type.

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