Example sentences of "occurs [prep] about " in BNC.
Next page| No | Sentence |
|---|---|
| 1 | Peak generation occurs at about 1% reflectance rather than at the 2–3% reflectance reported in a number of published studies . |
| 2 | In the human female fetal ovary the maximum number of pachytenes occurs at about 26 weeks , although they appear as early as 14 weeks and continue to about 30 weeks of gestation . |
| 3 | The velocity of conduction varies somewhat ; in the giant axons of Periplaneta it occurs at about 7 metres per second , while in the afferent nerves from the paraprocts of Anax nymphs it is about 2 m -I ( see , for example , Chapman and Pankhurst , 1967 ) . |
| 4 | It has been shown conclusively in the south-east of England that a marked terrace of early Pleistocene age with beach deposits in some localities occurs at about 195 m ( 650 ft ) OD ( Wooldridge and Linton , 1955 ) . |
| 5 | Though the single preparasitic moult occurs at about three weeks after the egg is passed , a period of maturation is necessary , and it is not infective until a minimum of four weeks after being passed , even in the optimal temperature range of 22-26oC . |