Rudd & Genelly 1954 noticed that bird pests seemed uninterested in treated seeds, specifically pheasants and blackbirds around Davis, CA, US. They tested its repellent effect on pheasants and found it effective, speculating that it may be usable as a general bird repellent. Preparation
Lindane is prepared by treating chlorine with benzene in the presence of sunlight and in the absence of oxygen as well as substitution catalysts. Human health effects
The EPA and WHO both classify lindane as "moderately" acutely toxic. It has an oral LD50 of 88 mg/kg in rats and a dermal LD50 of 1000 mg/kg. Most of the adverse human health effects reported for lindane have been related to agricultural uses and chronic, occupational exposure of seed-treatment workers.Exposure to large amounts of lindane can harm the nervous system, producing a range of symptoms from headache and dizziness to seizures, convulsions, and more rarely, death. Lindane has not been shown to affect the immune system in humans, and it is not considered to be genotoxic. Prenatal exposure to β-HCH, an isomer of lindane and production byproduct, has been associated with altered thyroid hormone levels and could affect brain development.The Occupational Safety and Health Administration and National Institute for Occupational Safety and Health have set occupational exposure limits (permissible exposure and recommended exposure, respectively) for lindane at 0.5 mg/m3 at a time-weighted average of eight hours for skin exposure. People can be exposed to lindane in the workplace by inhaling it, absorbing it through their skin, swallowing it, and eye contact.
Coarse facial features or coarse facies describes a constellation of facial features that are present in many inborn errors of metabolism. Features include:
large, bulging head
prominent scalp veins
"saddle-like, flat bridged nose with broad, fleshy tip"
large lips and tongue
small, widely spaced and/or malformed teeth
hypertrophic alveolar ridges and/or gumsHeads tend to be longer than normal from front to back, with a bulging forehead. This is because of the earlier than normal or premature fusion of skull bones in an affected individual. Causes
Several conditions are associated with coarse facial features. Acromegaly
Alpha-mannosidosis type II
Aspartylglycosaminuria
Battaglia Neri syndrome
Borjeson Syndrome
Chromosome 6q deletion syndrome
Coarse face - hypotonia - constipation
Congenital hypothyroidism
Dandy-Walker malformation (with mental retardation basal ganglia disease and seizures)
Dyggve-Melchior-Clausen Syndrome
Fucosidosis type 1
Fucosidosis type II
Gangliosidosis generalized GM1 (type 1)
Gangliosidosis GM1 (type 3)
GM1 gangliosidosis
Goldberg syndrome
Hyde-Forster-Mccarthy-Berry syndrome
Hyper IgE
Hypomelanosis of Ito
I cell disease
Immunodeficiency due to defect in MAPBP-interacting protein
Infantile sialic acid storage disorder
Job syndrome
Mannosidosis (alpha B lysosomal)
McCune-Albright Syndrome
Mental retardation (X-linked - epilepsy - progressive joint contractures - typical face)
Mental retardation (X-linked Raynaud type)
Mieschers syndrome
Morquio syndrome
Morquio syndrome type A
Morquio syndrome type B
MPS 3 C
MPS 3 D
Mucolipidosis III
Mucopolysaccharidosis type 2 Hunter syndrome- mild form
Mucopolysaccharidosis type 2 Hunter syndrome- severe form
Mucopolysaccharidosis type 3
Mucopolysaccharidosis type 6
Mucopolysaccharidosis type 7 Sly syndrome
Mucopolysaccharidosis type I Hurler syndrome
Mucopolysaccharidosis type I Hurler/Scheie syndrome
Mucopolysaccharidosis type I Scheie syndrome
Multiple endocrine abnormalities - adenylyl cyclase dysfunction
Multiple endocrine neoplasia type 2b
Neuraminidase deficiency (type II juvenile form)
Nodulosis-arthropathy-osteolysis syndrome
Nonkeratan-sulfate-excreting Morquio syndrome
Pituitary tumors (adult)
Sialidosis type II (congenital)
Sialidosis type II (infantile)
Sialuria syndrome
Simpson-Golabi-Behmel syndrome
Simpson-Golabi-Behmel syndrome - type 1 (SGBS1)
Skeletal dysplasia - coarse facies - mental retardation
Spondyloepimetaphyseal dysplasia (genevieve type)
Sulfatidosis juvenile (Austin type)
Winchester syndrome

See also
Facies (medical)

References
External links
https://web.archive.org/web/20090106211640/http://www.mps1disease.com/patient/about/mps_pt_symptom_coarse_facial_features.asp