Para 4.6 Purchasing

The supplier must buy only from those people who they know will be able to provide in accordance with the supplier requirements and the vendors must match quality and delivery needs. 

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Canada has no known basic producers of chlorobenzene. There is one company that isolates small quantities of ortho and para from purchased mixed dichlorobenzenes. Some of the isolated product is exported. The primary portion of Canada s chlorobenzenes comes from the United States. 

T = pipe wall thickness (measured or minimum per purchase specification) t — pressure design thickness, as calculated in accordance with para. IP-3.2.1 for internal pressure or as determined in accordance with para. IP-3.2.2 for external pressure tm — minimum required thickness, including mechanical, corrosion, and erosion allowances W = weld joint strength reduction factor per para. IP-2.2.10... 

Pipeline valves purchased to API 6D requirements shall be capable of passing the pressure tests described in API 6D Annex C, para. C4, using helium as the test medium. Other valves shall be capable of passing the pressure tests described in API 598, using helium as the test medium. 

P-cyclodextrin (P-CD) was supplied by Roquette Freres (France). (3-aminopropyl) trimethoxysilane (97%) (APS), tetraethyl orthosiUcate (99.999%) (TEOS) and N,N-dimethylacetamide (99%) (DMAc) were purchased from Aldrich and used without further purification. Sodium dodecylsulfate (>97%) (SDS) was obtained from Fluka. Para-nitrophenol (99%) (p-NP) was supplied by Acros Organics and lead(II) nitrate (99.99%) by Sigma. 

Instructions relating to the use of consumer products are required to be provided with the product (Ref. [2], para. III.17), as they are with any other product. Labels are also required to be provided on the products to indicate the presence and the nature of the radiation source (Ref. [2], para. III.16) and thereby meet the public s demand for information about the goods that they purchase. However, it should be noted that if particular instructions or labels are considered necessary to ensure that the dose criterion for the exemption of the product is met, then the product should not be approved for distribution to the public, since there is no practical way of ensuring that the public using the products will heed the instructions or the labels. 

Highly purified HiPCO single wall carbon nanotubes were purchased from CNI Inc., USA. Xylene (in ortho and para forms) was purchased from VWR, UK and used as obtained. Aniline was purchased from Riedel de Haen, Germany. All other chemicals were purchased from Sigma Aldrich. 

Materials. Horseradish peroxidase (HRP) (EC 1.11.1.7) (200 unit/mg) was purchased from Sigma with RZ > 2.2. A stock solution of 10 mg/ml in O.IM phosphate buffer (PH = 6.0) was prepared. The para substituted azophenol monomers were synthesized following typical procedure. All other chemicals and solvents used were commercially available, of analytical grade dr better and used as received. 

DBM and para-aminobenzoic acid (PABA) were purchased from Aldrich Chemical Company, Inc (Milwaukee, WI). DMBA was obtained from Calbiochem-Beluinger (San Diago, CA). TPA was purchased from CRC, Inc., (Chanhassen, MN). Mirex was purchased from Fischer Scientific (Springfield, NJ). Female SKH-1 mice (5-6 weeks old) and female CD-I mice (23 days old or 5-6 weeks old) were purchased from Charles River Laboratories (Kingston, NY) and kept in animal facility at least 1 week before use. Mice were fed a Purina Laboratory Chow 5001 diet and water ad libitum. 

Materials. Anisole (1), terephthalonitrile (2) m-cyanoanisole (3b), o- and p-dimethylbenzenes (5a and c), 15-crown-5, 18-crown-6, benzonitrile, and KCN, were purchased. CH2CI2 was distilled from CaH2. PEG 200- 1000 (Nakarai Chem. Co) were dried azeotropically by benzene. Ortho- and para-cyanoanisoles (3a and 3c ) were prepared according to the methods of the literatures. 1,3-Pentadiene and acetone were distilled directly before use. 

Platmum(0)-l,3-divinyl-l,l,3,3-tetramethyldisiloxane (Karstedt catalyst) in xylene and hexachloroplatinic acid (40wt% Pt) as a 1% solution in THF was purchased from Aldrich chemical. 1,1,3,3-Tetramethyldisiloxane (Aldrich) was used without further purification. Divinylbenzene 960 (DVB), which is a mixture of 96% divinylbenzene (meta and para isomers) was purified from the phenolic inhibitor by stirring with 5% by weight basic alumina rmtil the TLC showed the complete removal of inhibitor. The alumina was filtered using Whatman GF/F (0.7 pm). THF was distilled using benzophenone ketyl rmder a nitrogen atmosphere. 

The Ministry of Defence (MoD) already requires that tenderers for safety-critical systems "provide reasonable evidence that there is an awareness of safety throughout their organisation" [7] para 7.3.1. So far as the author is aware, neither the MoD nor other major purchasers define "safety awareness" or what would constitute reasonable or acceptable evidence of that quality. Denis Jackson has suggested what might constitute reasonable evidence [9], and the revision of Def Stan 00-S6 which was due for completion in late 1993 may clarify the MoD requirements. 

Silicone oils SO20 (viscosity 0.218 P), SOSO (viscosity 0.554 P), SOlOO (viscosity 1.18 P), and SO500 (viscosity 5.582 P) purchased from Prolabo, Productos para Laboratorios Quimicos, a Spanish company, were used in the spreading experiments. The viscosity of oils were measured using the capillary Engler Viscometer VPG-3 at 20 0.5°C. Cellulose nitrate membrane filters purchased from Sartorius (type 113), with pore size 0.2 and 3 pm (marked by the supplier). 

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