C2-C10 hydrocarbon emissions from a boreal wetland and forest floor H. Hellén, H. Hakola, K.-H. Pystynen, J. Rinne, and S. Haapanala Finnish Meteorological Institute, PL 503, 00 101 Helsinki, Finland University of Helsinki, Department of Physical Sciences, Helsinki, Finland Received: 29 September 2005 – Accepted: 13 October 2005 – Published: 23 November 2005 Correspondence to: H. Hellén (heidi....

BACKGROUND AND OBJECTIVE Promotion of family planning has been shown to reduce poverty, hunger, maternal and infant mortality, and contribute to women's empowerment. But many resource-limited countries still have very low rates of contraceptive use. The present study aimed to assess the knowledge, attitude and practice of family planning among women living in a resource-poor rural setting. ME...

The impact of age and sex on the expression of hepatic cytochrome P450 3A4 (CYP3A4) was recently determined in a transgenic mouse line carrying the human CYP3A4 gene. To further investigate the physiological regulation of human CYP3A genes, a novel transgenic mouse line was generated using a bacterial artificial chromosome clone containing both CYP3A4 and CYP3A7 genes. CYP3A7 expression was obs...

Background: Diabetes is a metabolic disease caused by a deficiency in the pancreatic secretion of insulin and/or by the inability of tissues to efficiently respond to insulin, events that cause hyperglycemia and affect all organs.Tissue alterations caused by diabetes affect different organic systems , including the male reproductive system. Reproductive dysfunction is one of the common secondar...

In many species, older males are often preferred mates because they carry "good" genes that account for their viability. In some animals, including mice, which rely heavily on chemical communication, there is some indication that an animal's age can be determined by its scent. In order to identify the attractants in aged male mouse urine, chemical and behavioral studies were performed. We herei...

germline and somatic stem cells are distinct types of stem cells that are dedicated to reproduction and somatic tissue regeneration, respectively. germline stem cells (gscs), which can self-renew and generate gametes, are unique stem cells in that they are solely dedicated to transmit genetic information from generation to generation. we developed a strategy for the establishment of germline st...

noise is considered as one of the harmful factors at industrial environments. it affects human health in different aspects including harmful influences on auditory, vision, neurological and psychiatric systems, hormones, physiological and mental systems. paying attention to the importance of hormonal effects on human body seems to possess crucial importance. the aim of the present study is to i...

the aim of this study was to evaluate changes that occur in motility parameters of progesterone treated mouse spermatozoa during course of hyperactivation. mouse spermatozoa treated with different doses of progesterone were videotaped after 10 min and 90 min of incubation. for each sperm, one second of movement of the head-midpiece junction was traced from the videotape and for each tracing sev...

Accurate measurement of testosterone is important for reproductive endocrinology research, but the validity of direct (nonextraction) testosterone immunoassays, developed and validated for human serum, has not been appraised for application to mouse serum or steroidogenic tissue extracts. Testosterone was measured in serum and extracts of testis or ovary from male and female wild-type mice by 2...

Early-life social isolation has profound effects on adult social competence. This is often expressed as increased aggression or inappropriate displays of courtship-related behaviors. The social incompetence exhibited by isolated animals could be in part due to an altered ability to participate in communicatory exchanges. House mice (Mus musculus) present an excellent model for exploring this id...