Skin

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Skin

ISO 3166-3 code for Sikkim, which acceded to India in 1975. ISO 3166-3 codes are used to indicate names of countries that are no longer used.
References in periodicals archive ?
Overall, many adolescents appear to be able to provide a reasonably accurate assessment of their pubertal maturation based on the presence of secondary sex characteristics.
Ethnic difference in the presence of secondary sex characteristics and menarche among US girls: the Third National Health and Nutrition Examination Survey, 1988-1994.
Under a dissecting microscope, we assessed the phenotypic sex of individual medaka by examining externally visible secondary sex characteristics, including the shape of the urogenital papilla, the shape of the dorsal fin, and the shape and the presence or absence of papillary processes on the anal fin.
In general, we considered that medaka with total body lengths greater than 17 mm have passed the immature stages of gonadal development and have developed well-defined secondary sex characteristics.
Congruence between secondary sex characteristics and gonadal sex declined in a concentration-dependent manner in the male and female medaka (Figure 8).
In the medaka from the control treatment, the secondary sex characteristics were in agreement with the gonadal sex in 96% of females and 100% of males (Figure 6).
In tests with Japanese medaka laboratory models, genistein and equol altered the development of the gonad and secondary sex characteristics.
The medaka is a sexually dimorphic species, and mature males are recognizable by external secondary sex characteristics such as the shape of the dorsal fin, where there is a characteristic shallow notch in the posterior end (Egami 1955).
Although the estrogenic potential of equol and genistein may explain the testicular alterations and the feminization of secondary sex characteristics in males, especially at the highest test concentrations, it cannot account for the adverse effects on ovarian development and the masculinization of the dorsal and anal fins.
It is possible that any of the above mechanisms may play a role in the altered ovarian development and masculinization of secondary sex characteristics in female medaka in both genistein and equol treatments.
In field studies, white suckers (Catostomus commersoni] exposed to pulp mill effluents experience delays in sexual maturity, lower gonadosomatic indices, reduced numbers of viable eggs, and alterations of secondary sex characteristics (McMaster et al.