In 1836 Henry Fox Talbot, an inventor of photography, published the results of some experiments in optics that he had previously demonstrated at a British Association meeting in Bristol. "It was very curious to observe that though the grating was greatly out of the focus of the lens...the appearance of the bands was perfectly distinct and well defined...the experiments are communicated in the h...

INTRODUCTION: Musculoskeletal disorder is one of the major health hazards among agricultural workers. Rural women contribute to development and household activities pursue multiple livelihood strategies. Female cultivators' studies on work-related musculoskeletal disorders (WRMSDs) are limited. OBJECTIVES: To verify prevalence in female cultivators from Ambala, Haryana, India. Materials methods...

BACKGROUND and Overview. With the increased use of nickel-titanium (NiTi) rotary instruments for root canal preparation in endodontics, instrument fracture has become more prevalent. Extensive research has been conducted on the physical properties and mechanical characteristics of NiTi rotary instruments, as well as the factors that can contribute to instrument failure. NiTi rotary instruments ...