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Head louse egg (nit) attached to hair shaft of host. Like most insects, head lice are oviparous. Females lay about three or four eggs per day. Louse eggs (also known as nits), are attached near the base of a host hair shaft. [11] [12] Eggs are usually laid on the base of the hair, 3–5 mm off the scalp surface.
The presence of nits alone, however, is not an accurate indicator of an active head louse infestation. Generally, white nits are empty egg casings, while brown nits may still contain viable louse larva. One way of determining the nit is to squeeze it between two fingernails; it gives a characteristic snapping pop sound as the egg bursts.
A dead nit attached to a hair. No nit policy is a public health policy implemented by some education authorities to prevent the transmission of head lice infestation.The "no nit" policy requires the sending home and barring of all children who have nits (egg shells) on their hair from controlled settings such as school, summer camp or day care facilities.
The hot comb was an invention developed in France as a way for women with coarse curly hair to achieve a fine straight look traditionally modeled by historical Egyptian women. [44] However, it was Annie Malone who first patented this tool, while her protégé and former worker, Madam C. J. Walker, widened the teeth. [45]
Some names such as Marie Curie and Ada Lovelace are widely known, many other women have been active inventors and innovators in a wide range of interests and applications, contributing important developments to the world in which we live. [2] [3] The following is a list of notable women innovators and inventors displayed by country.
The World Today, styled also as The World Today with Maryam Moshiri is a news programme that premiered on both UK feed and international feed of BBC News channel on 21 February 2024. The programme is mainly hosted by Maryam Moshiri. The show, dedicated to international news is said to "bring the best of the BBC's global journalism to audiences ...
Wanda Gass, Texas Instruments Fellow; executive director and founder, High-Tech High Heels ("HTHH"), a donor-advised fund at Dallas Women's Foundation that funds programs to prepare girls to pursue degrees in Science, Technology, Engineering and Math (STEM) [43] [44] [45] (see also Wanda Gass oral history)
There were 337 women listed on the world's billionaires as of 4 April 2023, up from 327 in 2022. [1] Since 2021, Françoise Bettencourt Meyers has been listed as the world's wealthiest woman. According to a 2021 billionaire census, women make up 11.9% of the billionaire cohort, and "just over half of all female billionaires are heiresses, with ...