Establishment of seed quality control programs

An efficient quality control program should lead to the production of high quality seeds. Consequently, a series of technical and administrative procedures must be adopted in a way that does not compromise this objective. Considering that, in applied terms, external control becomes less important as internal control programs advance technologically, this work emphasizes the principle factors that should be considered in the implantation of a seed quality control program, such as: work groups, physical structure and procedures to initiate the program.

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Interlaboratory Comparison of Lead and Cadmium in Blood, Urine, and Aqueous Solutions

Clinical Chemistry ◽

10.1093/clinchem/24.10.1797 ◽

1978 ◽

Vol 24 (10) ◽

pp. 1797-1800 ◽

Cited By ~ 12

Author(s):

Poul-Erik Paulev ◽

Poul Solgaard ◽

Jens Christian Tjell

Keyword(s):

Quality Control ◽

Aqueous Solutions ◽

Interlaboratory Comparison ◽

Control Program ◽

Quality Control Program ◽

Control Programs ◽

Lead And Cadmium ◽

Biological Liquids

Abstract Analysis for lead and cadmium in biological liquids (blood and urine) is difficult. Results of such analyses from five laboratories are compared for samples with known additions of lead and cadmium. The data, evaluated in terms of inter- and intralaboratory reproducibility and accuracy, suggest that laboratories should voluntarily participate in quality control programs. Users of routine laboratories are advised to use their own quality control program.

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Estimation, prevention, and quality control of carbon dioxide loss during aerobic sample processing.

Clinical Chemistry ◽

10.1093/clinchem/27.10.1676 ◽

1981 ◽

Vol 27 (10) ◽

pp. 1676-1681 ◽

Cited By ~ 15

Author(s):

Z L Bandi

Keyword(s):

Carbon Dioxide ◽

Quality Control ◽

Control Program ◽

Blood Collection ◽

Serum Samples ◽

Quality Control Program ◽

Control Programs ◽

Tert Butylamine ◽

Clinically Significant ◽

Blood Collection Tubes

Abstract We find that 2 to 6 mmol of carbon dioxide per liter (mean: 4.1 mmol/L) is lost during routine laboratory processing of patients' serum samples after centrifugation. Additional CO2 may be lost if evacuated blood-collection tubes are not filled completely during phlebotomy. More than 2 mmol of CO2 per liter is lost from samples stored in tightly stoppered tubes for 120 min if the tubes are less than half full. In extreme cases, 8 mmol of CO2 per liter may be lost from samples exposed to room air in open cups of automated micro-sample instruments. Clinically significant CO2 loss (greater than 2 mmol/L) before analysis is not detected by many laboratories because the generally accepted quality-control programs monitor only the very last step of the analytical process. A valid CO2 quality-control program should include samples with high as well as the generally used low pCO2 values. Alkalinization of serum and plasma samples with tert-butylamine prevents CO2 loss. Optimum tert-butylamine concentration, pH, and pCO2 were about 14 to 16 mmol/L, 9.0 to 9.3, and 0.4 to 1.5 mmHg (about 50 to 200 Pa).

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Interlaboratory comparison of lead and cadmium in blood, urine, and aqueous solutions.

Clinical Chemistry ◽

10.1093/clinchem/24.10.1997 ◽

1978 ◽

Vol 24 (10) ◽

pp. 1997-1800

Author(s):

P E Paulev ◽

P Solgaard ◽

J C Tjell

Keyword(s):

Quality Control ◽

Aqueous Solutions ◽

Interlaboratory Comparison ◽

Control Program ◽

Quality Control Program ◽

Control Programs ◽

Lead And Cadmium ◽

Biological Liquids

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Biospecimen quality program in the biobank of the Norwegian Institute of Public Health

Norsk Epidemiologi ◽

10.5324/nje.v21i2.1498 ◽

2012 ◽

Vol 21 (2) ◽

Cited By ~ 6

Author(s):

Liv Paltiel ◽

Jeanette Aarem ◽

Siri Bækken ◽

Nina K. Stensrud ◽

Kari Harbak

Keyword(s):

Public Health ◽

Quality Control ◽

Biological Material ◽

Control Program ◽

Sample Collection ◽

High Quality ◽

Quality Control Program ◽

Long Term Storage ◽

Quality Program ◽

Processing And Storage

Background: The biological material collected, processed and stored in biobanks are important research tools and it is important to minimize preanalytical variations to provide researchers with high quality biological material that will give reproducible results. Methods: To minimize the preanalytical variations caused by sample collection, processing and storage, we have established a biospecimen quality program. It consists of quality assurance aspects as well as quality control programs to measure adherence to protocols and sample integrity. The quality control program includes measurements and evaluation of the DNA quality and quantity before storage, i.e. concentration, purity, fragmentation and PCR success, and long term storage programs for plasma, urine and RNA. Conclusions: The Biobank at the Norwegian Institute of Public Health has established a biospecimen quality program that ensures high quality specimens and provides the documentation required to use the biomaterial in a best possible way.

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