Although there is no evidence that any one policy is the best solution, clinics as well as legislators tend to impose one position about donor anonymity on all participants. The most evident alternative policy is to let the parties decide for themselves. Donors may choose between anonymity or identification and recipients can opt for an anonymous or identifiable donor. This 'double track' polic...

Electron spin resonance of donors in GaAs has been observed through optical orientation and detection of spins. GaAs samples doped below the metal–insulator transition were studied. The resonance linewidth increases as the concentration of donors is reduced, due to the dependence of the T2 * spin lifetime on correlation effects between donor electrons. The linewidth of the lowest doped sample (...

background blood transfusion is one of the many ways, through which toxoplasma gondii (t. gondii), a protozoan parasite, can be transmitted to humans. objectives this cross sectional study aimed to evaluate the seroprevalence of toxoplasma infection and related epidemiological features among healthy blood donors. materials and methods a total of 375 blood samples from donors were tested for spe...

The structural and optical properties of self-nucleated crystals grown by a near atmospheric pressure solution growth method are presented. High-resolution room temperature Raman scattering studies demonstrate that stress-free crystals with low free-electron background have been produced. Low and room temperature photoluminescence experiments confirm the presence of shallow donors and an unknow...

The field of gamete donation for medically assisted reproduction purposes is evolving. While anonymous gamete donation was long the preferred practice, a new focus on the rights and interests of donor-conceived children has led a number of countries to shift towards an open-identity system. However, this evolution appears to overlook whether information exchange could also be of interest to the...

In Vasterbotten County in northern Sweden a start-up biotech company has recently gained all commercial rights to one of the worlds largest population based research biobanks. The biobank and the company have publicly emphasized that all donors have given their informed consent to participate, but within the academy it has become debated whether people have been adequately informed. Based on an...

background: this study aimed at determining the prevalence and associated risk factors for asymptomatic malaria parasitaemia and anemia among blood donors in a private medical laboratory in benin city, nigeria. methods: venous blood was collected from a total of 247 blood donors. malaria status, abo, rhesus blood groups and hemoglobin concentration of all participants were determined using stan...

Zinc oxide (ZnO) is a strong candidate for energy-efficient white lighting and numerous optoelectronic applications. Hydrogen impurities play important roles, good and bad, in the pursuit of reliable p-type doping of ZnO. In pervious work, we identified hydrogen donors with the back-bonded or ‘‘anti-bonding’’ orientation, with an angle of 1111 to the c-axis. It is possible, however, that these ...

In Spain, there exists an increasing amount of advertising for the donation of eggs for assisted reproduction. This study attempts to assess: (1) scientific evidence available about adverse effects of egg donation; (2) characteristics of the information given in the informed consent to donors; and (3) the legality of this advertising. The main results are: (1) Many severe problems are associate...