A study on the usage of lawsone with the aid of black powder to enhance latent fingerprints on paper materials which was then compared with ninhydrin was done. Fraction containing lawsone was obtained through extraction from the leaves of Lawsonia inermis.Materials such as newspaper, envelope, writing paper and tissue paper consisting, one week old and four months old fingerprints were used. Enhancement was done using ninhydrin standard solution, lawsone with the aid of black powder and the fraction containing lawsone with the aid of the black powder. The enhancement showed that the ninhydrin produced clear results for the new, one week old fingerprints on envelope and newspaper whereas unclear results for the new fingerprints on writing paper and old, four months old fingerprints on all the paper materials tested. Whereas both lawsone and the fraction containing lawsone with the aid of black powder produced clear results for both the new and old fingerprints instilled on paper materials such as envelope, writing paper and newspaper. Tissue paper could not be enhanced using ninhydrin, standard lawsone or fraction containing lawsone with the aid of black powder.
First Certificate Writing helps students studying at upper intermediate level to develop their writing skills.Through a focused analysis of exam tasks, carefully staged activities and model texts. First Certificate Writing gives students all the guidance and practice they need to successfully answer any question in the Writing paper of the First Certificate exam. The First Certificate Writing Teacher's Book includes: An overview of the Writing paper of the First Certificate examination. A detailed description of the units in the Students' Book. An analysis of the writing skills required for Paper 2 of the FCE exam. A sample marked composition with a suggested correction code. An explanation of the marking criteria for FCE Paper 2. Lesson-by-lesson notes, with complete answer key, suggested answers and additional tips for the teacher. Формат: 21 см х 29,5 см.
New Fowler Proficiency Writing Skills is a two-part course providing thorough coverage and practice of the skills and techniques needed to achieve success in the writing paper of the revised Proficiency examination.