Notice. British Standard Institution

1965 ◽  
Vol 2 (11) ◽  
pp. 174
Keyword(s):  
British Standard Institution ◽  
British Standard

Analysis of Fat-Soluble Vitamins. XVII. Comparison of Chemical and Biological Assays of Vitamin D

1978 ◽  
Vol 61 (1) ◽  
pp. 117-121
Author(s):  
Frits J Mulder ◽  
Roel Strik
Keyword(s):  
Vitamin D ◽  
Coefficient Of Variation ◽  
Chemical Method ◽  
Geometric Mean ◽  
British Standard Institution ◽  
Geometric Mean Ratio ◽  
British Standard ◽  
Biological Assays ◽  
Chemical Assay ◽  
Fat Soluble Vitamins

Abstract Two methods, the chemical assay using maleic anhydride addition and the British Standard Institution chick bioassay, were used to analyze samples from vitamin D3 resin batches manufactured over a period of about 4 years. Statistical analysis of data obtained for vitamin D shows that (1) the reproducibility of the chemical assay has a coefficient of variation of 0.7% ; (2) the chemical assay is suitable for controlling the dilution procedure of resins in oil, the product variability being represented by a coefficient of variation of 1.7% ; (3) the agreement between the average values obtained by the bioassay and the chemical method is satisfactory (geometric mean ratio = 99.7%, n = 39); (4) the chick bioassay has 95% limits of variation of about ±30% for single results.

scholarly journals Evaluation of gravel for concrete and road aggregates, Rapti River, Central Nepal Sub-Himalaya

1970 ◽  
Vol 10 ◽  
pp. 99-106 ◽  
Author(s):  
Surendra Maharjan ◽  
Naresh Kazi Tamrakar
Keyword(s):  
Los Angeles ◽  
Chemical Weathering ◽  
Effective Porosity ◽  
Raw Material ◽  
British Standard Institution ◽  
Dry Density ◽  
Carbonate Group ◽  
British Standard ◽  
Los Angeles Abrasion

Several local mining sites of sand and gravel have been operating for decades in the Rapti River. River gravels are consumed in Hetauda, Narayanghad and areas in India near the border between Nepal and India. Until now little known about consumers concerning about quality of gravel. The present study was carried out to evaluate quality of river gravel to know its suitability for aggregate (raw material for concrete and road). The samples of river gravel were analysed for petrographic, physical, mechanical and chemical properties. Samples were categorised as quartzite group, carbonate group and granite group according to British Standard Institution (BSI). Among these, samples of quartzite group were found dominant. Image analysis of gravel showed that clasts were well graded. The majority of the samples had rounded, high sphericity and oblate triaxial clasts. The surface texture of clasts was rough to smooth. In terms of shape, workability of gravel was satisfactory. Gravel samples possessed low water absorption value (0.69 to 1.12%) and low effective porosity. Dry density of samples ranged from 2460 to 2680 kg/m3. Aggregate impact values of samples (14.2 to 16.1%) showed good soundness. Los Angeles abrasion test also showed consistent hardness of each of the samples as uniformity factor did not exceed 0.2. Magnesium sulphate values ranged between 4.46% and 7.29% suggesting good resistance against chemical weathering and frosting. Comparing with the existing Nepal Standard, British Standard and American Standard of Testing Material, the studied samples were suitable for concrete and road aggregates.   doi: 10.3126/bdg.v10i0.1425      Bulletin of the Department of Geology, Tribhuvan University, Kathmandu, Nepal, Vol. 10, 2007, pp. 99-106

scholarly journals Customisation and Desirable Characteristics of a Standard Method of Measurement for Building Works in Ghana

2012 ◽  
Vol 8 (2) ◽  
pp. 30-40 ◽  
Author(s):  
Gabriel Nani ◽  
Peter Edwards ◽  
Theophilus Adjei-Kumi ◽  
Edward Badu ◽  
Peter Amoah
Keyword(s):  
Construction Industry ◽  
Standard Method ◽  
The Other ◽  
Opinion Survey ◽  
British Standard ◽  
Industry Practice ◽  
Precision Industry ◽  
Method Of Measurement ◽  
Insight Into ◽  
Methods Of Measurement

This paper reports a study that identified andcategorised the modifications to the 5thEdition of the British Standard Method ofMeasurement (SMM5) of building works inGhana. Typical modifications involved ‘costinsignificant items’, ‘minor labour items’,‘custom units of measurement’, ‘methodrelated items’, ‘combinable items’,‘subordinate items’, and ‘items of minorinformative impact’. It was also observed thatthe desirable characteristics/ qualities ofstandard methods of measurement (SMM) ofbuilding work were noteworthy, since theyprovide insight into the nature of a SMMrequired for the construction industry inGhana.The research reviewed available literature,various SMMs and bills of quantities (BQs).The relevance of the modifications andSMM characteristics identified wasconfirmed by a survey of the opinions ofprofessional quantity surveyors conductedthrough a carefully designed questionnaire.Inferences from the opinion survey formedthe basis for grouping both SMMmodifications found and the desired qualitiesof a SMM for Ghana.Survey respondents confirmed all theidentified modifications to the British SMM,except for the elimination of items of minorinformative impact. It was held that allinformation was relevant in measurement.Desirable characteristics of a SMM were ratedin decreasing order of relevance as: easylocation of items; cost significance; simplicity;thoroughness; ease of cost analysis; goodpractice; conciseness; adoptability; precision;industry practice; stakeholders’ opinion;custom classification; regional relevance; andinclusion of jargon. It was noted that therelevance of these characteristics may varyform one region to the other as a result oftechnological, cultural and legal differences.However, the desired SMM characteristicswere recommended as fundamental indeveloping an appropriate SMM for Ghana.

Pressure Gauge Safety

1980 ◽  
Vol 13 (8) ◽  
pp. 283-283 ◽  
Keyword(s):  
Pressure Gauge ◽  
Health And Safety ◽  
Product Liability ◽  
British Standard ◽  
Safety Requirements ◽  
Safety Regulations

The British Pressure Gauge Manufacturers Association has always emphasised the need for strict observance of recognised safety requirements when using pressure gauges. Unfortunately, gauges are both available and used that do not meet the rigid safety regulations laid down in British Standard 1780 and this could lead to serious accidents. The provisions of the Health and Safety at Work Act coupled with the strengthened proposals for Product Liability will place a greater statutory responsibility upon the manufacturer and user alike. The Association has therefore prepared the following statement:

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