Increasing volumes of treated and untreated human sewage discharged into rivers around the world are likely to be leading to high aquatic concentrations of toxic, unionized ammonia (NH3), with negative impacts on species and ecosystems. Tools and approaches are needed for assessing the dynamics of NH3. This paper describes a modeling approach for first-order assessment of potential NH3 toxicity...

NH3 is a thyroid hormone receptor (TR) antagonist that inhibits binding of thyroid hormones to their receptor and that inhibits cofactor recruitment. It was active in a tadpole tail resorption assay, with partial agonist activity at high concentrations. We determined the effect of NH3 on the cholesterol-lowering, thyroid stimulating hormone (TSH)-lowering, and tachycardic action of thyroid horm...

The objective of this study was to examine ammonia (NH3) exhaust emissions as a function of different vehicle operating conditions and cycles. A total of eight vehicles with low-emission vehicle (LEV) to super-ultra-low-emission vehicle (SULEV) certification were tested over the Federal Test Procedure (FTP75), a US06 cycle, a hot running 505, a New York City Cycle (NYCC), and a specially design...

The plasma generated from a gas mixture of NH3 plus O2 (NH3 + O2) has been used to impart unique chemical and biological characteristics to polytetrafluoroethylene (PTFE). PTFE treated with NH3 + O2 plasma was physiochemically distinct from surfaces treated with plasma of either NH3 or O2 alone, as determined by electron spectroscopy for chemical analysis (ESCA). The contact angle analysis reve...

We present the rst detection of NH3 ice in the thermal infrared in Jupiter’s atmosphere using Cassini CIRS observations in the 10m region obtained on 31 December 2000 and 1 January 2001. We identify a brightness temperature di;erence ≡ TB(1040 cm−1) − TB(1060 cm−1) as an indicator of spectrally identi able NH3 ice, where 1040 cm−1 is an adjacent continuum region and 1060 cm−1 is the NH3 ice fea...

CONTEXT A discrepancy exists between the abundance of ammonia (NH3) derived previously for the circumstellar envelope (CSE) of IRC+10216 from far-IR submillimeter rotational lines and that inferred from radio inversion or mid-infrared (MIR) absorption transitions. AIMS To address the discrepancy described above, new high-resolution far-infrared (FIR) observations of both ortho- and para-NH3 t...

Data on ammonia (NH3) emissions from pullets (hens <18 weeks of>age) are non-existent despite the large differences in nutritional and environmental conditions between raising pullets and laying hens. Different stocking densities (SDs) in housing the birds may be used according to certain industry guidelines on production; however, information concerning the impact of SD on properties of accumu...

In the United States, swine (Sus scrofa) operations produce more than 14 Tg of manure each year. About 30% of this manure is stored in anaerobic lagoons before application to land. While land application of manure supplies nutrients for crop production, it may lead to gaseous emissions of ammonia (NH3) and nitrous oxide (N2O). Our objectives were to quantify gaseous fluxes of NH3 and N2O from e...

The collisions also injected tropospheric ammonia (NH3) in the stratosphere where it is ordinarily absent. SignaWe present high–resolution 11–mm NH3 observations of the Shoemaker–Levy 9 sites that were conducted on May 15–18, tures from stratospheric ammonia were detected from 1995 UT at the NASA Infrared Telescope Facility. No emission thermal infrared spectroscopy at the NASA Infrared from st...