Ammonia emissions from a dairy housing and wastewater treatment plant quantified with an inverse dispersion method accounting for deposition loss.

Ammonia (NH) emissions negatively impact air, soil, and water quality, hence human health and biodiversity. Significant emissions, including the largest sources, originate from single or multiple structures, such as livestock facilities and wastewater treatment plants (WWTPs). The inverse dispersion method (IDM) is effective in measuring total emissions from such sources, although depositional loss between the source and point of measurement is often not accounted for.

An Assessment of Starch Content and Gelatinization in Traditional and Non-Traditional Dog Food Formulations.

Starch gelatinization in pet food may be affected by moisture, retention time, and ingredients used. Starch gelatinization has been associated with changes in digestibility but is not well studied using non-traditional ingredients in canine diets. The objective of this research was to examine differences in starch content and gelatinization associated with changes in ingredient profile (traditional vs.

A novel approach to partitioning evapotranspiration into evaporation and transpiration in flooded ecosystems.

Reliable partitioning of micrometeorologically measured evapotranspiration (ET) into evaporation (E) and transpiration (T) would greatly enhance our understanding of the water cycle and its response to climate change related shifts in local-to-regional climate conditions and rising global levels of vapor pressure deficit (VPD). While some methods on ET partitioning have been developed, their underlying assumptions make them difficult to apply more generally, especially in sites with large contributions of E. Here, we report a novel ET partitioning method using artificial neural networks (ANNs) in combination with a range of environmental input variables to predict daytime E from nighttime ET measurements.

Restoring wetlands on intensive agricultural lands modifies nitrogen cycling microbial communities and reduces NO production potential.

The concentration of nitrous oxide (NO), an ozone-depleting greenhouse gas, is rapidly increasing in the atmosphere. Most atmospheric NO originates in terrestrial ecosystems, of which the majority can be attributed to microbial cycling of nitrogen in agricultural soils. Here, we demonstrate how the abundance of nitrogen cycling genes vary across intensively managed agricultural fields and adjacent restored wetlands in the Sacramento-San Joaquin Delta in California, USA.

Productive wetlands restored for carbon sequestration quickly become net CO2 sinks with site-level factors driving uptake variability.

Inundated wetlands can potentially sequester substantial amounts of soil carbon (C) over the long-term because of slow decomposition and high primary productivity, particularly in climates with long growing seasons. Restoring such wetlands may provide one of several effective negative emission technologies to remove atmospheric CO2 and mitigate climate change. However, there remains considerable uncertainty whether these heterogeneous ecotones are consistent net C sinks and to what degree restoration and management methods affect C sequestration.

Methane emissions reduce the radiative cooling effect of a subtropical estuarine mangrove wetland by half.

The role of coastal mangrove wetlands in sequestering atmospheric carbon dioxide (CO ) and mitigating climate change has received increasing attention in recent years. While recent studies have shown that methane (CH ) emissions can potentially offset the carbon burial rates in low-salinity coastal wetlands, there is hitherto a paucity of direct and year-round measurements of ecosystem-scale CH flux (F ) from mangrove ecosystems. In this study, we examined the temporal variations and biophysical drivers of ecosystem-scale F in a subtropical estuarine mangrove wetland based on 3 years of eddy covariance measurements.

Experimental harvesting of wetland plants to evaluate trade-offs between reducing methane emissions and removing nutrients accumulated to the biomass in constructed wetlands.

Constructed wetlands built for water treatment often need biomass harvesting to remove nutrients from the system. Usually harvesting is done during the peak growing season to maximize the amount of nutrients removed from the system. This, however, can create huge methane fluxes that escape from plant tissues to the atmosphere.

[Transplacental transfer, tissue localization and morphological study of the rabbit placenta after the administration of pentacaine].

On day 29 of gravidity, the New Zealand white breed rabbits were intravenously administered 3H-pentacaine (0.5 mg.kg-1), a new local anaesthetic agent with anti-ulcerous effect in order to study the distribution in pregnant females.

Endoscopic gastroduodenal polypectomy.

The authors performed a total of 288 successful endoscopic gastroduodenal polypectomy procedures in 129 patients. Drawing on literary data and the results of follow-up of their own patients, they regard endoscopic gastroduodenal polypectomy as a successful and relatively low-risk method for secondary prevention of gastric cancer. Recurrence of adenomas, with malignant degeneration in 6-75%, was noted, only in the first year after primary polypectomy, in 8% of patients.

Decreased apolipoprotein levels in women with hyperprolactinemia related to increased estradiol level: effect of hepatic lesion?

In 3 groups of women (1. with pathological hyperprolactinemia, but low estradiol level--19 patients; 2. with pathological hyperprolactinemia, but high estradiol level--17 patients; 3.

Malignant tumors and embolizing paraneoplastic endocarditis.

A group of 4495 autopsied patients was evaluated. In 1011 (22.5%) of them various malignancies were found.