Work with flat glass

Provision and Use of Work Equipment Regulations 1998 and ACoP L22 Personal Protective Equipment at Work Regulations 1992 Construction (Health, Safety and Welfare) Regulations 1996 British Standard BS6262 1992 — Code of Practice for glazing of buildings BS6226 Part 4 1994 — Safety related to human impact 

Pre-contract planning must include the provision of a safe means of access for operatives and materials. The effect of wind pressure must be taken into account for glazing work at height or involving large sheets. Safe storage racks must be available to receive glass delivered to site. 

Handling, drilling and cutting glass will require the use of PPE. This may include eye and foot protection, strong industrial gloves with wrist protection and aprons, and will be provided as required for the task. Provision of suitable 

Where suction lifting pads are used, the load should be tested first near to the ground with the power turned off for at least 5 minutes to prove the integrity of the vacuum seals. 

Management will ensure that storage facilities are adequate and are maintained to the required standard. Broken glass or off cuts (cullet) will be cleared from work areas immediately on completion of work. Access equipment must be inspected by management on erection and before use, to ensure it is suitable and safe for operatives and their equipment. Weather conditions v/ill be monitored to ensure safe systems of work can be maintained at all times. 

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Gas welding and cutting 45. Work with flat glass... 

Using a Pasteur pipette, dispense approximately 1.5 ml aliquots into sterile ampoules (biofreeze vials, Fig. 7.5). These may be blue spot or yellow band, easy snap glass ampoules (Epsom Glass Industries Ltd.) but plastic vials (Nunc, Costar or Sterilin) are now more common. The round bottom vials are difficult to work with and the standard flat bottom vials are very fiddly. Bibby Science Products (Appendix 3) supply a cryogenic work station... 

In 1947, Chapman- developed a instrument to measure the optical contact between a flat glass prism and the surface of paper. The idea of measuring the smoothness of paper under pressure simulating the compression of paper in a printing nip has been explored by several authors since- -2--. Perhaps the most striking result of this work is the low fraction of contact that is achieved. Under printing compression optical contact with smooth newsprint is about 20 percent and seldom above 50 percent for coated papers. 

Potentiometric penicillin sensors are mainly based on glass electrodes working with free enzyme or with enzyme included in an electrode cover. In the first penicillin electrode, (5-lactamase was directly photopolymer-ized in acrylamide on the electrode (Papariello et al., 1973). Enfors and Nilsson (1979) designed a sterilizable penicillin sensor where a solution containing (5-lactamase was pumped into a reaction chamber in front of a flat glass electrode, after sterilization of the electrode (Fig. 75). 

Wash bottles 7. Wash bottles for most work in semimicro analysis a 30 or 60 ml glass stoppered bottle is a suitable container for distilled water the latter is handled with a reagent dropper. Alternatively, a bottle carrying its own dropper (Fig. 2.14a or b) may be used. A small conical flask (25 or 50 ml) may be used for hot water. For those who prefer wash bottles, various types are available (Fig. 2.19) a is a 100 or 250 ml flat-bottomed flask with a jet of 0.5-1 mm diameter, and is mouth-operated is a wash bottle with full-glass joints (Quickfit MF 25/3), c and d are polyethylene bottles, from which the wash solution can be dispensed by squeezing. 

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