background: to determine any correlation between infertility and semen quality with concentrations of l-carnitine in human seminal plasma. methods: this case-control study performed in fatemieh hospital in hamadan, iran. seminal plasma of 72 infertile men and 80 men with proved fertility as a control group was investigated and l-carnitine level was determined using uv enzymatic test at 340 nm. ...

background: it has been shown that reactive oxygen species (ros) can lead to deleterious effects on a range of sperm parameters. vitamins e and c are capable of reducing ros levels and lipid peroxidation. objective: the aim of study was to determine the level of lipid peroxidation as indicated by malondialdehyde (mda) and vitamins e and c in sperm and seminal plasma of asthenoteratozoospermic a...

Studies and design of information technology support for workplaces, especially workshop floors, office floors and hospital floors, have a strong tradition in Scandinavia, involving workplace users and their trade unions and other stakeholders. The projects emphasize the active cooperation between researchers and workers in the organizations to help improve their work situation. This tradition ...

To study the influence of season on oxidative status of buffalo semen and their association with semen characteristics and seminal plasma proteins, ejaculates were collected twice a week in winter, summer and rainy seasons from six adult Bhadawari buffalo bulls. The neat semen was analyzed for semen characteristics immediately after collection and oxidative status viz. lipid peroxidation (LPO),...

Some biological aspects of semen were investigated in the Persian sturgeon, Acipenser persicus, by determination of seminal plasma indices (ionic composition and osmolality), sperm density and their relationships with sperm motility. The osmolality of seminal plasma ranged from 42.00 to 111.00 mOsmol Kg-1. The concentrations of Sodium (Na+), Potassium (K+), Chloride (Cl-), Calcium (Ca2+) and Ma...

In a seminal work at EUROCRYPT ’96, Coppersmith showed how to find all small roots of a univariate polynomial congruence in polynomial time: this has found many applications in public-key cryptanalysis and in a few security proofs. However, the running time of the algorithm is a high-degree polynomial, which limits experiments: the bottleneck is an LLL reduction of a high-dimensional matrix wit...

There has been much recent interest in fair scheduling algorithms for real-time multiprocessor systems. The roots of much of the research on this topic can be traced back to the seminal work of Baruah et al. on Proportionate fairness (Pfairness) [6]. This work proved that the problem of optimally scheduling periodic tasks1 on multiprocessors could be solved on-line in polynomial time by using P...

Cognitive science has incorporated seminal concepts of psychoanalysis without acknowledging this influence. This article covers psychoanalytic ideas already incorporatedimplicitly or explicitly-in modern cognitive psychology, as well as ideas whose inclusion would benefit the cognitive field. These include the emphasis on mental models, mind-body interaction, unconscious processes, dual process...

doi: 10.3969/j.issn.1002-0829.2012.02.010 National Center for Research on Evaluation, Standards, and Student Testing, University of California, Los Angeles, CA, USA *Correspondence: [email protected] A latent variable model, as the name suggests, is a statistical model that contains latent, that is, unobserved, variables. Their roots go back to Spearman’s 1904 seminal work on factor analysis, which...