Academic literature on the topic 'Acetylene lamps'

As an important component of automobile lighting, headlights have gone through the development process from acetylene headlights in the early days of birth to a wide variety of new headlights today. The article focuses on the development status, prospects, and trends of LED lamps in the lamp market, and analyses and prospects for the future of new lighting technologies such as OLED lamps, LCD lamps, and laser headlights.

Introduction: Calcium carbide used in fruit ripening industry as a cheap alternative to natural plant hormone ethylene produces highly inflammable acetylene gas. Inadvertent ignition of this gas can cause severe ocular burn injury with unilateral or bilateral blindness. Objective: To determine the characteristics and visual outcome of ocular burn injuries from calcium carbide during mango ripening season of West Bengal, eastern India. Materials and methods: A prospective study of all cases of calcium carbide related ocular burn injury attending a tertiary care hospital during mango ripening season was carried out. The demographic features, characteristics of the injury, management and outcomes were recorded. Results: Fifty five eyes of 33 patients were studied. Males were more commonly affected (20 patients, 60.6%) than females. The injury was bilateral in 22 patients (66.66%). Seventeen patients (51.51%) were below 20 years of age. Ten eyes had open globe injuries and 45 eyes had closed globe injuries. One eye of a patient had to be enucleated (3%). Children below 14 years of age were mainly injured while playing with indigenous fireworks of shooting carbide. Middle aged women were affected particularly during ignition of evening lamps. Carbide lamp was another source of injury. Conclusion: Males are more commonly affected by calcium carbide related ocular injuries. Children and young adults are the common victims. Such injuries can involve both the eyes and cause a permanent visual disability. Nepal J Ophthalmol 2013; 5(10): 242-245 DOI: http://dx.doi.org/10.3126/nepjoph.v5i2.8736

Optically transparent and electrically resistive amorphous carbon films can be deposited by photolysis of acetylene with VUV light on a substrate kept near room temperature. However, the deposited films are characterized by low refractive indices and soft. A similar result was obtained with electron-impact dissociation of acetylene. It is known that ions play important role in producing hard carbon films with high refractive indices. Therefore, we used a window-less, microwave-excited H2 tube to dissociate acetylene. Owing to its short wavelength components and presence of active hydrogen atoms, ions are generated from the source gas injected at the exit end of the discharge tube. They are further accelerated by an applied electric field. Then, not only deposition became faster, but as expected, we could improve film quality. The films were hard and their refractive indices became as high as 2.11. The bias required to improve film quality was approximately 300 V. The substrate was silicon. The deposition rate was 700 Å/min at room temperature, and it decreased with increasing substrate temperature.