Thermoelectric power of the systems AgI-Ag 2XO 4 (X=Mo, W)

Determination of the initial thermoelectric power were carried out at 1000K in the whole composition range of the molten systems AgI-Ag 2XO 4 (X=Mo, W). For the composition XAgI=0.8 the investigation was extended to the variation of the thermal e.m.f. at the `melting point' of the electrochemically noteworthy glass-like phases, obtained through rapid quenching of the melt. The hypothesis that these glass-like materials could keep the melt configuration at room temperature is contradicted by the results on the molten systems; more complex interpretations, based on the behaviour of the thermal e.m.f. at the `m.p.' are proposed

Thermoelectric power of the molten systems (Cu, Ag)X (X=Cl, Br, I)

Initial thermoelectric power determinations were carried out on the molten systems (Cu, Ag)X, (X=Cl, Br, I) at 1000K. As for the employing of either copper or silver electrode thermocells, the choice was based on literature thermodynamic data. Comparison between ideal and actual behaviour allowed the authors to discover negative excess partial ionic entropies

Thermoelectric power of the molten systems PbCl 2-MeCl (Me=Li, Na, K, Rb, Cs)

Initial thermoelectric power determinations where carried out by means of Pb electrodes and Cl 2 electrode thermocells on the molten systems PbCl 2-MeCl (Me=Li, Na, K, Rb, Cs). Combinations of the results coming from the two kinds of thermocells allowed to verify Reinhold's relation (1933) and to estimate the partial molar formation and excess entropies of PbCl 2

Thermoelectric power of the molten systems (Ag+Me)I and (Cu+Me)I (Me=Na, K, Rb, Cs)

The systems (Ag+Me)I and (Cu+Me)I were investigated by measuring their initial thermoelectric power; mixtures containing AgI show a behaviour much closer to the ideality than mixtures containing CuI. Interesting conclusions are suggested about the heats of transport of silver and copper ions in the pure molten iodides

Transport processes in TlI and in the AgI-TlI-system

The transport properties of TlI and the system AgI-TlI were investigated by measuring the electrical conductivity, sigma, and the electronic and ionic transport numbers. A particularly high electronic conductivity was detected in beta-TlI, while the alpha phase showed a predominant anionic contribution, as in TlCl and TlBr. The intermediate compounds, AgTl 2I 3 and AgTlI 2 , are silver ion conductors, but they exhibit low sigma values. A comparison with other polyiodides, with a high silver ion conductivity, is suggested on the basis of the crystal bond ionicity

Strategies to optimize the use of marginal donors in liver transplantation.

Liver transplantation is the treatment of choice for end stage liver disease, but availability of liver grafts is still the main limitation to its wider use. Extended criteria donors (ECD) are considered not ideal for several reasons but their use has dramatically grown in the last decades in order to augment the donor liver pool. Due to improvement in surgical and medical strategies, results using grafts from these donors have become acceptable in terms of survival and complications; nevertheless a big debate still exists regarding their selection, discharge criteria and allocation policies. Many studies analyzed the use of these grafts from many points of view producing different or contradictory results so that accepted guidelines do not exist and the use of these grafts is still related to non-standardized policies changing from center to center. The aim of this review is to analyze every step of the donation-transplantation process emphasizing all those strategies, both clinical and experimental, that can optimize results using ECD

Thermoelectric power of the molten systems (Cu,Me)Cl and (Cu,Me)Br (Me=Na, K, Rb, Cs)

The initial thermoelectric power of the molten systems (Cu,Me)Cl and (Cu,Me)Br (Me=Na,K,Rb,Cs) was determined using copper electrodes. The results are compared with previous results obtained from the systems (Cu,Me)I and (Ag,Me)X (X=Cl,Br,I)

Use of Elderly Donors in Liver Transplantation: A Paired-match Analysis at a Single Center

OBJECTIVE: To evaluate the use of elderly donors in liver transplantation (LT) and identify risk factors associated with a worse outcome. SUMMARY BACKGROUND DATA: Use of livers from very old donors could expand the donor pool but is not universally implemented. METHODS: This is a retrospective, single-center medical record review. From January 2001 to December 2014, 1354 LTs were performed. After exclusion of donors <18 years, ABO-incompatible LT, re-LT and UNOS 1 status patients, LT recipients were stratified into 2 groups based on donor age: 18-69 (n=692) vs. ≥70 years (n=515) then matched using a propensity score approach. Two groups were finally matched (young group = 448 cases; old group = 515 cases). RESULTS: The median (interquartile range [IQR]) follow-up was 5.0 (2.0-8.4) years. Comparing the 2 identified groups, no differences were observed regarding early retransplants (1.8 vs. 2.9; P = 0.3), HCV-related death (7.6 vs. 8.7%; P = 0.6), vascular (5.8 vs. 5.0%; P = 0.7), and biliary complications (16.5 vs. 18.6%; P = 0.4). On multivariate analysis, independent risk factors for graft loss were: HCV-positive recipient (HR = 2.1; 95% CI = 1.6-2.7; P < 0.001), donor age (HR = 1.0; 95% CI = 1.0-1.0; P < 0.001), cold ischemia time (HR = 1.0; 95% CI = 1.0-1.0; P = 0.042), and donor history of diabetes mellitus (HR = 1.48; 95% CI = 1.03-2.13; P = 0.036). CONCLUSIONS: Use of elderly donors is not associated per se with an increased risk of vascular and biliary complications. In the presence of cold ischemia time and diabetes mellitus, appropriate donor-to-recipient matching is warranted