Human Fallopian tube epithelial cell co-culture increases fertilization rates in male factor infertility but not in tubal or unexplained infertility

In order to investigate the effect of human Fallopian tube epithelial cell co-culture on fertilization and cleavage rates in tubal, male and unexplained infertility, oocytes collected from 91 patients were randomized to wells containing Fallopian tube epithelial cell monolayers or conventional culture medium, and inseminated with spermatozoa. Fertilization and cleavage were assessed at 18 and 52 h, respectively. Co-culture significantly increased the fertilization rates over the control values in male infertility (41.67 versus 23.43%, P = 0.00005), but not in tubal infertility (69.33 versus 67.93%) or unexplained infertility (65.93 versus 54.36%). Cleavage rates were not different in coculture and conventional in-vitro fertilization systems in any of the infertility subgroups. The number of blastomeres was significantly higher in the co-culture group on the day of embryo transfer (3.63 +/- 1.12 versus 3.04 +/- 1.26, P < 0.001). Pregnancy rates were similar in all infertility subgroups. There was no significant association between the number of co-cultured embryos transferred and the pregnancy, abortion and multiple pregnancy rates. It was concluded that human Fallopian tube epithelial cell coculture clearly improves fertilization rates in male infertility but not in tubal or unexplained infertility. Improved fertilization rates in co-culture may be due to positive effect of co-culture on impaired sperm function

When is a linear complementarity system controllable?

This paper deals with the controllability problem of a class of piecewise linear systems, known as linear complementarity, systems. it is well-known that checking certain controllability properties of very simple piecewise linear systems are undecidable problems. In an earlier paper, however, a complete characterization of the controllability of the so-called conewise linear systems has been achieved. By employing this characterization and exploiting the special structure of linear complementarity systems, we present a set of inequality-type conditions as necessary and sufficient conditions for their controllability. Our treatment is based on the ideas and the techniques from geometric control theory together with mathematical programming

Non-aqueous electrolyte solutions in chemistry and modern technology

In this paper a brief survey is given of the properties of non-aqueous electrolyte solutions and their applications in chemistry and technology without going into the details of theory. Specific solvent-solute interactions and the role of the solvent beyond its function as a homogenous isotropic medium are stressed. Taking into account Parker's statement1) ldquoScientists nowadays are under increasing pressure to consider the relevance of their research, and rightly sordquo we have included examples showing the increasing industrial interest in non-aqueous electrolyte solutions. The concepts and results are arranged in two parts. Part A concerns the fundamentals of thermodynamics, transport processes, spectroscopy and chemical kinetics of non-aqueous solutions and some applications in these fields. Part B describes their use in various technologies such as high-energy batteries, non-emissive electro-optic displays, photoelectrochemical cells, electrodeposition, electrolytic capacitors, electro-organic synthesis, metallurgic processes and others. Four Appendices are added. Appendix A gives a survey on the most important non-aqueous solvents, their physical properties and correlation parameters, and the commonly used abbreviations. Appendices B and C show the mathematical background of the general chemical model. The Symbols and abbreviations of the text are listed and explained in Appendix D

Legal and institutional foundations of Turkey’s domestic and transboundary water policy

Turkey’s water policy and management is a culmination of various laws and regulations governed by a range of national ministries and executive administrations. Over time, several changes were made in the existing legislation and institutions, which ended up with complex water management system in Turkey. Existing surface and groundwater laws have become insufficient in responding to the increasing water demand and diminishing water supply. On the other hand, neoliberal transformation of Turkish economy in the 1980s and the country’s harmonization process with the European Union since the early 2000s have produced new primary and secondary water legislations in the domestic water, irrigation, hydropower and the environment sectors. In this context, this chapter, firstly, describes the principal water legislation in Turkey. Secondly, main water institutions are depicted with specific attention to the reorganization processes of various key ministries due to domestic and regional political changes. Finally, Turkey’s transboundary water policy is delineated with its basic principles and prevailing practices.WOS:000487756200018Book Citation Index- Science - Book Citation Index- Social Sciences and HumanitiesArticle; Book ChapterMayıs2020YÖK - 2019-2