Aquaria

For the aqueous solution Place 16mL of cool distilled water into your bubbler setup. The "expected, not theoretical, yield of Methylamine from this amount of reactants is 7 grams. I have used a plastic aquarium aerator tube as the bubbler with excellent results. Sure beats using an inverted funnel. 

This experiment describes the construction of an air sampler using an aquarium pump, a flow meter, a filter holder, and bottles that serve as traps for analytes. Applications include the determinations of SO2, NO2, HCHO, and suspended particulate matter. 

Gilles de Pelichy, L. D. Adams, C. Smith, E. T. Analysis of the Essential Nutrient Strontium in Marine Aquariums by Atomic Absorption Spectroscopy, /. Chem. Educ. 1997, 74, 1192-1194. 

The concentration of strontium in a sea water aquarium is determined by atomic absorption using the method of... 

This experiment describes a semester-long project in which the concentration of several ions in a fresh water aquarium are monitored. Ions that are monitored using potentiometric electrodes include H+ (pH electrode), Gh (chloride electrode), HG03 (GO2 electrode), NH4+ (NH3 electrode), and N03 (NH3 electrode). Nitrate concentrations were determined following its conversion to ammonia. 

The analysis of N03 in aquarium water was carried out by CZE using 104 as an internal standard. A standard solution of 15.0-ppm N03 and 10.0-ppm 104 gives peak heights (arbitrary units) of 95.0 and 100.1, respectively. A sample of water from an aquarium is diluted 1 100, and sufficient internal standard added to make its concentration 10.0 ppm. Analysis gives signals of 29.2 and 105.8 for N03 and 104 , respectively. Report the parts per million of N03 in the sample of aquarium water. 

Animals that do not readily accept pelleted feeds may be enticed to do so if the feed carries an odor that induces ingestion. Color development is an important consideration in aquarium species and some animals produced for human food. External coloration is desired in aquarium species. Pink flesh in cultured salmon is desired by much of the consuming pubHc. Coloration, whether external or of the flesh, can be achieved by incorporating ingredients that contain pigments or by adding extracts or synthetic compounds. One class of additives that imparts color is the carotenoids. 

Does your house have air conditioning, or a heat pump Do you have solar he,- ig, a Jacu22i bath, swimming pool, aquarium, solar heating, a roof mounted water storage tank, a well, a power assisted commode, a motorboat, a jet ski, ATV or camper Then you have even more mechanical sealed pumps. We have mechanical sealed pumps in practically all facets of our everyday life, and these pump seals last for years wii problems. 

R/0 unit Reverse Osmosis Unit for water purification in small aquariums and miniature yard-ponds, utilizes a membrane under pressure to filter dissolved solids and pollutants from the water. Two different filter membranes can be used the CTA (cellulose triacetate) membrane is less expensive, but only works with chlorinated water and removes 50-70% of nitrates, and the TFC membrane, which is more expensive, removes 95% of nitrates, but is ruined by chlorine. R/0 wastes water and a system that cleans 100 gallons a day will cost ft-om 400 to 600 with membrane replacement adding to the cost. A unit that handles 140 gallons a day will cost above 700,00. 

The "Aquarium Technique as a Pressure Gage Single Shot Results for Ten Explosives (All Charges d=7.2cm, L 11.4cm)... 

For Comp B of slightly lower density, Jameson and Hawkins (Ref 4) measured 266 Pq 1 284 kbar using a shock transmission technique. The aquarium method of Rigdon and Akst (Ref 6) gave 294< PCJ- 304kbar for a Comp B of slightly higher density than that of Ref 3. Clearly K. am let s complaint is well justified, since measured PCJ for Comp B vary from 266 to 312 kbar ... 

In Table 2 the aquarium measurements of Rigdon Akst (Ref 6) are compared with LLL measurements. Agreement is surprisingly good... 

Environmental Sciences Division, Oak Ridge National Laboratory, P.O. Box 2008, Oak Ridge, TN 37831-0335 Monterey Bay Aquarium Research Institute, 160 Central Avenue, Pacific Grove, CA 93950-0020... 

Endosulfan does not bioaccumulate to high concentrations in terrestrial or aquatic ecosystems. In aquatic ecosystems, residue levels in fish generally peak within 7 days to 2 weeks of continuous exposure to endosulfan. Maximum bioconcentration factors (BCFs) are usually less than 3,000, and residues are eliminated within 2 weeks of transfer to clean water (NRCC 1975). A maximum BCE of 600 was reported for a-endosulfan in mussel tissue (Ernst 1977). In a similar study, endosulfan, isomers not specified, had a measured BCE of 22.5 in mussel tissue (Roberts 1972). Tissue concentrations of a-endosulfan fell rapidly upon transfer of the organisms to fresh seawater for example, a depuration half-life of 34 hours (Ernst 1977). Higher BCFs were reported for whole-body and edible tissues of striped mullet (maximum BCF=2,755) after 28 days of exposure to endosulfan in seawater (Schimmel et al. 1977). However, tissue concentrations decreased to undetectable levels 48 hours after the organisms were transferred to uncontaminated seawater. Similarly, a BCE of 2,650 was obtained for zebra fish exposed to 0.3 pg/L of endosulfan for 21 days in a flow-through aquarium (Toledo and Jonsson 1992). It was noted that endosulfan depuration by fish was rapid, with approximately 81% total endosulfan eliminated within 120 hours when the fish were placed in a tank of water containing no endosulfan. 

Section on Growth Factors, National Institute of Child Health and Human Development, National Institutes of Health, Bethesda, MD 20892 Osborn Laboratories of Marine Sciences, New York Aquarium,... 

Brandeis University, 224 Brigham and Women s Hospital, 23,202 Centre National de la Recherche Scientifique, 192,290 Colorado State University, 336 Cornell University, 144 Harvard Medical School, 2,29,202 Institut National de la Sant et de la Recherche Mddicale, 192 Lawrence Berkeley Laboratory, 290 Massachusetts Institute of Technology, 204 Medical College of Georgia, 107 Mitsubishi Kasei Institute of Life Sciences, 133,219 Nagoya University, 232 National Cancer Center Research Institute, 204,224,232 National Institutes of Health, 347 New York Aquarium, 347 New York University, 304,347 The Salk Institute, 256... 

Fish and submerged plants depend on the equilibria between O2 and CO2 in the atmosphere and dissolved in the water. Home aquariums use air bubblers to maintain equilibrium concentrations by replenishing these gases. 

Holes were tapped in the center of each piece of bar stock to accept A inch NPT pipe, and a Kordon Mist Air aquarium bubbler was glued into a smaller hole on the bottom inside of the bubbler. 

A series of interesting observations was made [32] while maintaining N. inermis in a laboratory aquarium fey some months in the presence of selected prey, mainly Haminoea virescens and Bulla gouldiana. 

B. striata, its secondary metabolic pattern, consisting of a series of uncommon polypropionates, is almost identical to that of its prey [36,37], On the contrary, if the mollusc, under maintenance in an aquarium, feeds on Haminoea navicula, it discharges [5] in the form of a yellow secretion two Haminoea metabolites, the haminols (8,9), structurally related to navenone-A (I), which possess alarm pheromone properties [38] for H. navicula. Studies on a third Aglajidae mollusc [39, 40], Philinopsis speciosa, led to the characterization of a 2-alkyl-pyridine, pulo upone (10), as a minor constituent co-occurring with two polypropionates closely related to the metabolites from the pair P. depicta-B. striata. 

In order to investigate whether the above glycerides are derived from the animal s diet or by biosynthesis, [2-14C]RS-mevalonic add DBED salt was injected into the digestive gland of A. montereyensis and A. odhneri spedmens, which were placed in a running sea-water aquarium for 24 h and then extracted [79]. Incorporation of the label was checked in the major metabolites of the two nudibranchs, namely 23 and 51 in A. montereyensis and 47 in A. odhneri, after HPLC purification and conversion to derivatives that were also purified via... 

Hall, K.C. and D.R. Bellwood. 1995. Histological effects of cyanide, stress and starvation on the intestinal mucosa of Pomacentrus coelestis, a marine aquarium fish species. Jour. Fish Biol. 47 438-454. 

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