Myrtus communis L. young and mature Leaves were collected in Fars (the southern province of Iran). The aim of this research was to investigate essential oil content and composition of myrtle leaves which were at different ontogeny stages. Essential oil was extracted by hydrodistillation method using Clevenger apparatus, the oils were analyzed by GC–MS. Highest content of essential oil were reco...

In previous research, we studied both the oxytocin and vasopressin ontogeny in the hypothalamic supraoptic and paraventricular nuclei, and the ANP-ontogeny in the hypothalamic supraoptic nucleus. In this paper we evaluate the ANP-ontogeny in the rat hypothalamic suprachiasmatic nucleus; infact the suprachiasmatic nucleus it is known to synthesize vasopressin, a peptidic hormone involved in the ...

Although purified capsular polysaccharide of Neisseria meningitidis group B (CpsB) is not immunogenic at any age, CpsB on the bacterial surface elicits antibody responses late in ontogeny. Therefore, a detailed analysis of the ontogeny of the murine anti-CpsB response to N. meningitidis could determine key parameters regarding the poor immunogenicity of CpsB. The effects of bacterial dose, hype...

During early ontogeny, stimuli that pose a threat to an animal change. Unrelated adult male rats may kill young rats, but infanticide ends around weaning. Predation, on the other hand, may increase during early ontogeny when rats begin to extend their activity range. We investigated the developmental course of two defensive responses, immobility and analgesia, in young rats exposed to an adult ...

Intestinal maturation can be influenced by intrinsic factors (glucocorticoid hormones) and by extrinsic factors (resident microflora); their relative roles in ontogeny of mouse intestinal trehalase expression, a marker of general gut development, and of beta1,4-galactosyltransferase (beta GT), a marker of glycosyltransferase development, were investigated. In conventional (CONV) mice, beta GT a...

Prior research has demonstrated that globin ontogeny of hamster proceeds nearly to completion during the several days that yolk sac erythroid cells (YSEC) circulate in the embryo; synthesis of embryonic globin chains gives way to synthesis of adult globin chains in these primitive cells. In the present study, we translated total cell RNA extracted from YSEC on days 9-13 of gestation in wheat ge...

Front cover: Cover image: An embryo of a house gecko (Hemidactylus turcicus) with cartilagenous skeleton stained blue’. See A.H. Griffi ng and colleagues, ‘Ontogeny the paraphalanges derived phalanges Hemidactylus turcicus (Squamata: Gekkonidae)’, this issue.

At birth pancreatic exocrine function is far from mature and, like many other organ systems of the newborn, undergoes rapid development during early life. Knowledge of the functional capacity of the human pancreas during the perinatal period has important implications for the feeding of neonates, especially those born preterm or who are retarded in growth, and for making recommendations about t...

Predation can cause morphological divergence among populations, while ontogeny and sex often determine much of morphological diversity among individuals. We used geometric morphometrics to characterize body shape in the livebearing fish Brachyrhaphis rhabdophora to test for interactions between these three major shape-determining factors. We assessed shape variation between juveniles and adults...

Some previously unpublished data are also presented.