Fungal diversity on brewery filling hall surfaces and quality control samples

Yeast ◽  
2021 ◽  
Author(s):  
Elina Sohlberg ◽  
Tuija Sarlin ◽  
Riikka Juvonen
Keyword(s):  
Quality Control ◽  
Fungal Diversity ◽  
Control Samples

scholarly journals Tracing total and dissolved material in a western Canadian basin using quality control samples to guide the selection of fingerprinting parameters for modelling

CATENA ◽  
2021 ◽  
Vol 200 ◽  
pp. 105095
Author(s):  
J.P. Laceby ◽  
P.V.G. Batista ◽  
N. Taube ◽  
M.K. Kruk ◽  
C. Chung ◽  
...  
Keyword(s):  
Quality Control ◽  
Canadian Basin ◽  
Selection Of ◽  
Control Samples

scholarly journals An Easily Overlooked Contamination of Syringes in Newborn Screening by Tandem Mass Spectrometry

2021 ◽  
Vol 8 ◽  
Author(s):  
Yanyun Wang ◽  
Yun Sun ◽  
Tao Jiang
Keyword(s):  
Mass Spectrometry ◽  
Quality Control ◽  
Tandem Mass Spectrometry ◽  
Newborn Screening ◽  
Retrospective Analysis ◽  
Tandem Mass ◽  
Patient Sample ◽  
Important Test ◽  
Control Samples

Background: Tandem mass spectrometry becomes a common and important test in newborn screening, but potential contamination of the equipment has largely been ignored.Methods: The source of contamination through Biosan quality control samples was examined prospectively, and further confirmed by retrospective analysis of patient samples.Results: We found that the source of contamination came from a syringe in the Biosan quality control samples. Furthermore, we found that a large number of indicators in the patient sample were interfered by syringe contamination in our center, and also in two other newborn screening centers, but the affected indicators were different in different screening centers.Conclusion: Syringe contamination will affect the detection of patient samples by tandem mass spectrometry and should be monitored carefully and immediately.

scholarly journals Comparison of statistical methods and the use of quality control samples for batch effect correction in human transcriptome data

PLoS ONE ◽  
2018 ◽  
Vol 13 (8) ◽  
pp. e0202947 ◽  
Author(s):  
Almudena Espín-Pérez ◽  
Chris Portier ◽  
Marc Chadeau-Hyam ◽  
Karin van Veldhoven ◽  
Jos C. S. Kleinjans ◽  
...  
Keyword(s):  
Quality Control ◽  
Statistical Methods ◽  
Batch Effect ◽  
Transcriptome Data ◽  
Human Transcriptome ◽  
Control Samples

scholarly journals The phenomenon of zinc deficiency among children in China aged 3–5 years old

2020 ◽  
Vol 79 (OCE2) ◽  
Author(s):  
Ye Bi ◽  
Zhenyu Yang ◽  
Xuehong Pang ◽  
Yifan Duan ◽  
Jianqiang Lai ◽  
...  
Keyword(s):  
Quality Control ◽  
Zinc Deficiency ◽  
Rural Areas ◽  
Serum Zinc ◽  
Zinc Level ◽  
Urban Children ◽  
Rural Children ◽  
Country Level ◽  
Multi Stage ◽  
Control Samples

AbstractIntroductionzinc is an essential micro-nutrient for growth and proper immune function. Yet there are limited data available on the prevalence of zinc deficiency among children aged 3–5 at the country level. This information will enable health planners to determine the need for zinc intervention activities and to stimulate further research into these areas.materials and methodsThe data on children aged 3–5 were extracted from the Chinese National Nutrition and Health Surveillance in 2013. By multi-stage stratified cluster randomly sampling method, 30 children aged 3–5 years old were selected from each region for this study from 55 counties in China to analyze serum zinc. Finally, 1472 children aged 3–5 years were included in the study. The concentration of serum zinc was determined by high resolution inductively coupled plasm mass spectrometry. High and low level quality control samples were used, measured value was (1.63 ± 0.04)mg/l and (2.80 ± 0.06)mg/l, respectively. CV of quality control samples were 1.69%~2.45%. The zinc deficiency was defined as serum zinc level < 70μg/dl with the standard of WHO.Resultsserum zinc means of children aged 3–5 years was (95.3 ± 18.2)μg/dl and 3.9% children with zinc deficiency. serum zinc means level in urban children was (98.9 ± 17.6)μg/dl, and (91.6 ± 18.2)μg/dl in rural area. we showed that the serum zinc deficiency rate was higher in rural children (5.5%) than urban children (2.4%), and there were significant differences between these two areas. serum zinc means level in boys aged 3–5 years was (95.3 ± 18.7)μg/dl, and (95.3 ± 17.8)μg/dl in girls aged 3–5 years old. The prevalence of zinc deficiency was 1.5%, 6.6% and 1.8% in 3~,4~,5~ years old urban boys, respectively; 6.8%, 7.7% and 4.0% in rural boys, respectively. The prevalence of zinc deficiency was 2.3%, 0.8% and 1.7% in 3~,4~,5~ years old urban girls, respectively; 4.1%, 7.0% and 4.0% in rural girls, respectively. And there were differences between urban and rural areas in girls of 4~.5 years.DiscussionThe zinc level of children aged 3–5 years in China has been improved compared with ten years ago, but the zinc deficiency of rural children is still lower than that of urban children, especially those aged 4 to 5 years in rural areas, so we should pay more attention to this group.

Evaluation of reproducibility of the cTnT immunoassay using quality control samples

2019 ◽  
Vol 495 ◽  
pp. 269-270 ◽  
Author(s):  
Rudina Ndreu ◽  
Veronica Musetti ◽  
Silvia Masotti ◽  
Martina Zaninotto ◽  
Concetta Prontera ◽  
...  
Keyword(s):  
Quality Control ◽  
Control Samples

Analytical Bias in a Quality Control Scheme

1969 ◽  
Vol 15 (11) ◽  
pp. 1039-1044 ◽  
Author(s):  
John R Allen ◽  
Rachel Earp ◽  
E Christis Farrell ◽  
H D Grümer
Keyword(s):  
Quality Control ◽  
Clinical Chemistry ◽  
Control Program ◽  
Chemistry Laboratory ◽  
Quality Control Program ◽  
Control Scheme ◽  
Clinical Chemistry Laboratory ◽  
Random Times ◽  
Quality Control Scheme ◽  
Control Samples

Abstract A quality control program utilizing both "known" and "blind" control specimens was analyzed in the routine clinical chemistry laboratory. The results obtained with the control samples of 18 automated and nonautomated procedures demonstrated the presence of analytical bias. Only through the evaluation of blind control samples tested at random times can a reliable measure of the proficiency of the laboratory be achieved.

Simple Manual Procedure for Determination of Serum Triglycerides

1975 ◽  
Vol 21 (6) ◽  
pp. 768-770 ◽  
Author(s):  
Jose Mendez ◽  
Barry Franklin ◽  
Harry Gahagan
Keyword(s):  
Quality Control ◽  
Calibration Curve ◽  
Room Temperature ◽  
Extraction Procedure ◽  
Serum Triglycerides ◽  
Modified Method ◽  
Color Development ◽  
Significant Difference ◽  
Control Samples

Abstract We describe a modified method for determining serum triglycerides (triacylglycerols), which is based on the heptane extraction procedure of Gottfried and Rosenberg [Clin. Chem. 19, 1077 (1973)] with the stable saponification, oxidation, and color development reagents of Neri and Frings [Clin. Chem. 19, 1201 (1973)]. This modified method eliminates one heating step, reduces saponification time to 5 min, absorbances are read at room temperature, and the calibration curve is linear to 3.0 g/liter. A sample comparison between the proposed method and the automated Block and Jarrett [Am. J. Med. Technol. 35, 1 (1969)] procedure showed no significant difference (r = 0.98). The coefficient of variation (47 duplicate samples) for the modified method was 6.3%. Further validation was obtained from analysis of quality-control samples; the proposed method gave equivalent values.

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