938 resultados para Relative deviation
Resumo:
14th Congress, 1st session, 1815-1816. House. Document no. 33.
Resumo:
13th Congress, 3d session. House. Doc. no. 13.
Resumo:
United States,13th Congress, 2d session, 1813-1814. House. Doc. no. 35.
Resumo:
February 28, 1815. Printed by order of the Senate of the United States.
Resumo:
April 16, 1808. Printed by Order of the Senate.
Resumo:
Flow injection analysis (FIA) was applied to the determination of both chloride ion and mercury in water. Conventional FIA was employed for the chloride study. Investigations of the Fe3 +/Hg(SCN)2/CI-,450 nm spectrophotometric system for chloride determination led to the discovery of an absorbance in the 250-260 nm region when Hg(SCN)2 and CI- are combined in solution, in the absence of iron(III). Employing an in-house FIA system, absorbance observed at 254 nm exhibited a linear relation from essentially 0 - 2000 Jlg ml- 1 injected chloride. This linear range spanning three orders of magnitude is superior to the Fe3+/Hg(SCN)2/CI- system currently employed by laboratories worldwide. The detection limit obtainable with the proposed method was determin~d to be 0.16 Jlg ml- 1 and the relative standard deviation was determined to be 3.5 % over the concentration range of 0-200 Jig ml- 1. Other halogen ions were found to interfere with chloride determination at 254 nm whereas cations did not interfere. This system was successfully applied to the determination of chloride ion in laboratory water. Sequential injection (SI)-FIA was employed for mercury determination in water with the PSA Galahad mercury amalgamation, and Merlin mercury fluorescence detection systems. Initial mercury in air determinations involved injections of mercury saturated air directly into the Galahad whereas mercury in water determinations involved solution delivery via peristaltic pump to a gas/liquid separator, after reduction by stannous chloride. A series of changes were made to the internal hardware and valving systems of the Galahad mercury preconcentrator. Sequential injection solution delivery replaced the continuous peristaltic pump system and computer control was implemented to control and integrate all aspects of solution delivery, sample preconcentration and signal processing. Detection limits currently obtainable with this system are 0.1 ng ml-1 HgO.
Resumo:
The purpose of this study was to examine the associations between bone speed of
sound (SOS) and body composition, osteoporosis-related health behaviours, and
socioeconomic status (SES) in adolescent females. A total of 442 adolescent females in
grades 9-11 participated. Anthropometric measures of height, body mass, and percent
body fat were taken, and osteo-protective behaviours such as oral contraceptive use
(OC), physical activity and daily calcium intake were evaluated using self-report
questionnaires. Bone SOS was measured by transaxial quantitative ultrasound (QUS)
at the distal radius and mid-tibia. The results suggest that fat mass is a significant
negative predictor of tibial SOS, while lean mass is positively associated with radial
SOS scores and calcium intake was positively associated with tibial SOS scores
(p
Resumo:
Small black and white photograph mounted on black card of an unidentified Bell family relative, possibly a sibling of Irene Bell, whose photo is similarly featured. This undated photograph was in the possession of the Rick Bell family, whose relatives include former Black slaves from the United States.According to the 1911 Census of Canada, Irene Bell had the following siblings: Ernest Bell, born 1889 Archie Bell, born 1895 Allen Bell, born 1901 Kenneth Bell, born 1910
Resumo:
This undated photograph features an unidentified Sloman family relative pictured outside of a house in an unknown location. The photograph was among the family memorabilia retrieved from the attic of Iris Sloman Bell, of St. Catharines, in the 1980s. The Sloman - Bell family has descendants who are former Black slaves from the United States who settled in southern Ontario.
Resumo:
January 16, 1816. Printed by order of the House of Representatives. 14th Congress, 1st Session, 1815-1816. House. At head of title: [27].
Resumo:
Boyd's justification of his conduct and complaints about being dropped from the Army list. Inscribed on page [1]: N. Emery, Esq.
Resumo:
15th Congress, 1st session, 1817-1818, House. Doc. 81. February 20, 1817. Read, and ordered to lie upon the table.
Resumo:
14th Congress, 1st session, 1815-1816. House. Document no. 33. January 27, 1816. Read and referred to the Committee on Military Affairs.
Resumo:
13th Congress, 3d session. House. Doc. no. 13. October 28, 1814. Read, referred to the Committee on Foreign Relations. Printed by A. and G. Way
Resumo:
February 28, 1815. Printed by order of the Senate of the United States. Printed be Roger C. Weightman