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The paper is based on the development of a wood preservative without metal salts to be used in use classes 3 and 4 (EN 335), eco-friendly and harmless to humans and animals. Boric acid was used as a biocide, due to its effectiveness against fungi and insects. It is also known to be easily leached from wood exposed to weather action. Colloidal silica was therefore added in the formulations to guarantee the fixation of boric acid to wood. The different formulations were tested for the protective efficacy against decay fungi through laboratory tests (EN 113) and field trials (EN 252). The results were promising, especially those concerning boron fixation and efficacy against decay fungi through laboratory tests, where some formulations and retentions gave a durability class 1 (very durable) according to EN 350-1. The fourth evaluation, after 50 months of field trials showed only a slight difference between the treated samples and controls.
This case report
describes features and surgical management in one patient that developed a worsening total III cranial nerve palsy in his right eye.
Our 45 year-old male patient worked for about 25 years in leather tanning
industry. He underwent medical history, routine blood test, eye exams that included visual acuity measurement,
slit-lamp examination, dilated retinal biomicroscopy and indirect ophthalmoscopy, fundus photography,
tonometry, corneal pachymetry,
Krimsky test, oculomotor examination and eye deviation
surgery. On examination of the fellow eye wasn’t found any disease. Stroke,
aneurysm and intracerebral causes of third nerve palsy were excluded, and medical history was negative for diabetes, cardiovascular disease, trauma,
neurological disease unless two previous polyneuropathies episodes
and one herpetic keratitis episode. Result of any neuroimaging studies were recorded (Our patients performed in hospital CT, MRI and MRI
angiography and all the testes were normal). To our knowledge third cranial
nerve palsy has never been observed in literature in leather workers. In
conclusion, it is important for ophthalmologists to evaluate carefully work
history and lifestyle persons and plan the surgical approach focusing the
different characteristics of these patients.