Traditionally, waterborne ammonia is considered a toxicant that decreases productivity in aquaculture. However, several recent studies have suggested, but not proven, that growth of salmonids might actually be stimulated by chronic exposure to very low levels of ammonia. In the present study, two 70-71 day growth experiments were conducted under rigorously controlled experimental conditions wit...

Highlights Lab-scale beef manure bedded packs were constructed to evaluate the temperature effect on gaseous emissions. Temperature had a tendency increase ammonia, hydrogen sulfide, and greenhouse gases in headspace above over time. Abstract . Throughout Upper Midwest, producers have observed increased land fertilizer prices, resulting popularity of confinement feeding facilities such as mono-...

present communication deals with the study of four village fish culture ponds (two wild and two managed ponds) from district hisar of haryana, india was undertaken, to correlate the water quality and biological cycles in ponds with fish production. studies have revealed that the ponds are in good trophic status. chlorides, total hardness, calcium, magnesium, biochemical oxygen demand (bod), pho...

Upcycling of nutrients from residual resources for producing microbial protein (MP) is an attractive method to valorize residues. In this study, we investigated bio-electrochemical methods recover ammonia-N, further production MP. Reject water and digestate were used ammonia-N recovery in fuel cell (MFC) system. one-stage process, was 32 – 42% with 57 154 kJ/m3 waste stream electricity generati...

Introduction The aerobic, lithotrophic, autotrophic bacteria exemplified by Nitrosomonas europaea derive energy from the activities of hydroxylamine oxidoreductase (HAO; NH20H + H 2 0 + HN02+4e-+4H+) [ l ] and ammonia monooxygenase (AMO; NH3 + O2 + 2H+ + 2e+ NH20H + H20) [2] which are co-dependent for generation of substrate or electrons, respectively [3-51. Electrons pass from HA0 to the tetra...

High concentrations of nitrogen compounds, such as ammonia observed in the petrochemical industry, are the major environmental pollutants. Therefore, effective and inexpensive methods are needed for its treatment. Biological treatment of various pollutants is a low cost and biocompatible replacement for current physico-chemical systems. The use of aquatic plants is an effective way to absorb th...

By using different transition metal containing precursors and liquid ammonia as solvent, single crystals of Sn44- cluster ammoniates were grown, three new compounds have been characterized by crystal structure determination. K4Sn4 ⋅ 8 NH3 (1) (P63, a=13.0370(6) Å c=39.0889(11) Å) has obtained dissolving a precursor with the nominal composition “KRuSn4” in ammonia, Rb2Na2Sn4 4.8 (2) (Pc, a=9.400...

Tomato plants, Lycopersicon esculentum L. cv. Tmknvf(2), and watermelon plants, Citrullus lanatus [Thomb.] Mansf. cv. Dulce maravilla, were grown for 30 days at different temperatures (15, 25 and 35 degrees C). We analysed soluble phenolics, enzymatic activities (phenylalanine ammonia-lyase, polyphenol oxidase and peroxidase), and dry weight. The impact of the three temperatures was different i...

A thermally regenerative ammonia battery (TRAB) is a new approach for converting low-grade thermal energy into electricity by using an ammonia electrolyte and copper electrodes. TRAB operation at 72 °C produced a power density of 236 ± 8 Wm(-2), with a linear decrease in power to 95 ± 5 Wm(-2) at 23 °C. The improved power at higher temperatures was due to reduced electrode overpotentials and mo...

A New Approach to Acid-Base Metabolism Poul Astrup 1 Plasma and Red Cell Cholesterol Gordon Fels, Eugene Kanobrocki, and Ervin Kaplan 16 The Polarographic Determination of Selenium in Urine Albert 0. Faulkner, Edward C. Knoblock, and William C. Purdy 22 Factors Affecting the Estimation of Pregnanediol in Human Urine G. S. Duboff , H. Saraiya, and S. .1. Behrman 30 Simplified Determination of th...