The present study aimed therefore to study the development of retina of postnatal young rats aged 7 and 14 days maternally fed on fried potato chips using two approaches: firstly, light and transmission electron microscopy and secondly, SD-SPAGE for the developing retina of the same stages.
Taking the increased boiler cost and additional tank installation an LPG central heating system can typically cost anything from Â£2,500 - Â£6,000 depending on the size of property.Ongoing running costs are higher than natural mains gas but lower than oil.aking the increased boiler cost and additional tank installation an LPG central heating system can typically cost anything from Â£2,500 - Â£6,000 depending on the size of property.
Current electric charges in the area are about 15Â¢ per kWh, natural gas is about $1.40 a ccf, propane is about $3.00 a gallon, and oil is about $3.20 a gallon. The annual cost to heat a 2200 square foot existing house of average energy consumption for different combinations of fuels and furnaces: 1  Natural Gas in an 80% furnace: $1215. 2  Natural Gas in a 92% furnace: $1095. 3  Oil in a 70% furnace: $2185.  Oil in an 80% furnace: $ 1 2004. Propane in an 80% furnace: $3143.  Propane in a 92% furnace: $2632.