Anti-Adenovirus Polyclonal antibody

Objectives Agenesis of the ductus venosus (ADV) has been associated with additional anomalies in up to 83% of cases. We sought to investigate characteristics, co-morbidities and outcomes of ADV in the current era. We hypothesized that rates of cardiac and non-cardiac diagnoses and survival would be higher, due to advances in genetic testing, prenatal diagnosis and surveillance. Methods A retrospective series of cases diagnosed at our institution from 2007 to 2018 were identified by searching our database. Cardiac and obstetric charts were reviewed for cardiac and extra-cardiac anomalies, genetic results and outcomes. Results Fourteen cases were diagnosed at a mean gestational age of 23.9 weeks (range 13-33). All had associated genetic, cardiac or extra-cardiac anomalies. Eight (57%) had cardiac anomalies and one other developed cardiomyopathy by 6 months. Extra-cardiac anomalies were present in 93% (13/14) and genetic diagnoses made in 75% (6/8) of those tested. Cardiac output Z-scores were >2 in 60% (6/10) prior to delivery. Two had hydrops, there was one intra-uterine death, 13 live-births and two neonatal deaths. Conclusion Our cohort had more associated diagnoses and a lower mortality than previously reported. In our experience, high output occurs frequently, however with a relatively low risk of hydrops and intrauterine death.

Mineral dissolution is an important process that provides materials and nutrients to ecosystems. However, a general rate scaling theory has not been developed that can be used to scale mineral dissolution rates from laboratory to field under variable water flow and solute transport conditions. In this study, a mathematical relationship has been derived that can be used to extrapolate the rate of mineral dissolution derived under well-mixed conditions to complex flow systems with spatial heterogeneity and temporal flow velocity transiency. The macroscopic mineral reaction rate in a flow system ((rFT) over bar) was derived as (rFT) over bar = integral(infinity)(0) r(tau)tau f (tau)d tau/(tau(adv)) over bar , where f (tau) is the fluid travel time distribution (FTTD) function, r(tau) is the reaction rate as a function of reaction time in a well-mixed system, and (tau(adv)) over bar, is the mean fluid travel time. Reactive transport simulations were performed to generate various scenarios of mineral dissolution under different flow conditions with permeability heterogeneity and flow velocity transiency using magnesite as an example. The macroscopic mineral dissolution rates calculated from the scaling relationship were compared with the rates averaged from the reactive transport simulations. The results indicate that the averaged magnesite dissolution rates decreased significantly in presence of permeability heterogeneity and under transient flow fluctuation conditions as compared to the rate determined from a homogeneous flow-through system with constant flow rate, showing a complex relationship between the averaged dissolution rate, local dissolution rate, and transient flow characteristics. Remarkably all the averaged rates that differ significantly under different flow conditions were converged to the scaling relationship, providing a consistent way to scale the rate of mineral dissolution from well-mixed reactors to complex flow systems. The results in this study were derived under a steady-state of porosity, permeability, and mineral surface reactivity, and further research is to incorporate their temporal variations. (C) 2020 Elsevier Ltd. All rights reserved.