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1. Infiltration Rates in Frozen Soils in Northern Minnesota

Author:
J. H. Stoeckeler; Sidney Weitzman
Source:
Soil Science Society of America journal 1960 v.24 no.2 pp. 137-139
ISSN:
0361-5995
Subject:
concrete; forests; frost; frozen soils; grasslands; infiltration rate; silt loam soils; steel; Minnesota
Abstract:
... Infiltration tests were conducted in northern Minnesota forests and grassland using single-ring steel cylinders. Concretely frozen silt loam soils showed 0.09 inch of infiltration per hour, while sands of similar frost type showed 0.47 inch. A porous-concrete frost type was found in loamy sands; in these soils infiltration amounts were 2.19 inches for the porous-concrete frost, 3.97 inches in part ...
DOI:
10.2136/sssaj1960.03615995002400020020x

2. Thermal Response of a Dry Surface to Shading Cycles of Short Period

Author:
C. A. Federer; C. B. Tanner
Source:
Soil Science Society of America journal 1963 v.27 no.3 pp. 266-269
ISSN:
0361-5995
Subject:
concrete; heat transfer; net radiation; roughness; shade; solar radiation; surface roughness; surface temperature; wind speed
Abstract:
... An experiment is presented on the thermal response of a nonevaporating surface (concrete) to square-wave pulses of solar radiation with half-periods ranging from 2 to 20 minutes. Heat flux into the concrete accounted for most of the net radiation but the data was inconsistent due to inadequate temperature sampling. The amplitude ratio of sensible heat to net radiation was 0.01 to 0.10, increasing ...
DOI:
10.2136/sssaj1963.03615995002700030016x

3. Field Experiments on Sealing Permeable Fine Sand With Bentonite

Author:
M. B. Rollins; A. S. Dylla
Source:
Soil Science Society of America journal 1964 v.28 no.2 pp. 268-271
ISSN:
0361-5995
Subject:
bentonite; concrete; drying; field experimentation; sand; seepage; wet-dry cycles; wind
Abstract:
... Bentonite has excellent sealing powers. Treating permeable fine sand with bentonite saved up to 99% of the water previously lost through seepage. From less than 1 up to 2 pounds of bentonite per square foot of sand surface was applied by adding a prepared bentonite suspension to the water or by mixing it dry with the sand. After drying for 1 month and then rewetting, the seals were 75 to 80% effec ...
DOI:
10.2136/sssaj1964.03615995002800020040x

4. On the orientation of houseflies to various surfaces

Author:
AREVAD, K.
Source:
Entomologia experimentalis et applicata 1965 v.8 no.3 pp. 175-188
ISSN:
0013-8703
Subject:
Musca domestica; bags; cages; concrete; jute; materials testing; straw; tiles; wood
Abstract:
... The attraction of houseflies (Musca domestica L.) to surfaces was investigated by repeated counting of flies on samples of materials. The materials tested were mainly such as ordinarily occur in stables. The observations were made partly in a big cage in the laboratory and partly in a stable. The mechanism of attraction to some surfaces was analyzed by counting the number of flies arriving per tim ...
DOI:
10.1111/j.1570-7458.1965.tb00852.x

5. A Mechanical Model for Wool

Author:
Emory Menefee
Source:
Textile research journal 1968 v.38 no.12 pp. 1149-1163
ISSN:
0040-5175
Subject:
combs (social insects); concrete; cortex; crosslinking; fabrics; formic acid; keratin; mechanical models; solvents; tensile strength; textile fibers; wool
Abstract:
... A model is presented which seems to account more fully for wool properties. This model contains two axially parallel parts: a microfibril made up largely of low-stability alpha-keratin and a matrix consisting of a series arrangement of high-stability alpha- keratin chains and amorphous protein partly extended in the axial direction. The matrix, which contains most of the cross links of the cortex, ...
DOI:
10.1177/004051756803801201

6. Toward a Concrete Concept of Effective Competition

Author:
Stephen H. Sosnick
Source:
American journal of agricultural economics 1968 v.50 no.4 pp. 827-853
ISSN:
0002-9092
Subject:
advertising; agricultural economics; concrete; industry; markets; misinformation; predation; prices; profits and margins; risk
Abstract:
... In presenting a concept of effective competition—that is, of a socially desirable state of affairs in an industry or a market—a writer should be specific about the issues, definite about his own views, explicit about necessary versus sufficient conditions, realistic about whether desirable conditions are attainable, discriminating in judging between a condition and its effects, comprehensive in li ...
DOI:
10.2307/1237622

7. Energy relationships in the design of floating covers for evaporation reduction

Author:
Cooley, K.R.
Source:
Water resources research 1970 v.6 no.3 pp. 717-727
ISSN:
0043-1397
Subject:
concrete; energy balance; equations; evaporation; infrared radiation; materials testing; mathematical models; reflectance; rubber; solar radiation; tanks
Abstract:
... A theoretical analysis of the energy balance equation for a partially covered body of water indicates that surface reflectance for solar radiation and infrared emittance are important properties to consider in designing covers for maximum efficiency in reducing evaporation. White materials satisfy the requirement that both these parameters be as large as possible. Experiments were conducted on ins ...
Handle:
10113/55282

8. Linseed oil on concrete: penetration of linseed oil compositions into sheet and liquid membrane-cured concretes

Author:
Gast, L.E.; Kubie, W.L.; Cowan, J.C.
Subject:
concrete; linseed oil
Handle:
10113/30901

9. Influence of Subsurface Barrier on Growth, Yield, Nutrient Uptake, and Water Requirement of Rice (Oryza sativa)

Author:
K. V. P. Rao; S. B. Varade; H. K. Pande
Source:
Agronomy journal 1972 v.64 no.5 pp. 578-580
ISSN:
0002-1962
Subject:
Oryza sativa; bitumen; concrete; flooded conditions; grain yield; iron; nutrient uptake; redox potential; rice; water requirement; water use efficiency; South East Asia
Abstract:
... Growth of rice (Oryza sativa) under flooded conditions in Southeast Asia results in excessive water and N losses. This investigation was conducted to determine the effect of subsurface barriers of bitumen and concrete on yields of rice grown with 60, 90, and 120 kg/ha of N. Yields of rice grown over the subsurface barriers were significantly higher than those grown on the control. The increase in ...
DOI:
10.2134/agronj1972.00021962006400050007x

10. The Rhizotron — Lysimeter Research Facility at TVA, Muscle Shoals, Alabama

Author:
J. M. Soileau; D. A. Mays; F. E. Khasawneh; V. J. Kilmer
Source:
Agronomy journal 1974 v.66 no.6 pp. 828-832
ISSN:
0002-1962
Subject:
automation; ceramics; concrete; drainage; heavy metals; lysimeters; mineral fertilizers; nutrients; organic wastes; polymethylmethacrylate; root growth; soil profiles; Alabama
Abstract:
... A combined root observation laboratory (rhizotron) and lysimeter was constructed at TVA's National Fertilizer Development Center in 1973. This mainly belowground-level facility consists of two rows of nine concrete bins, separated by an access area 3.3 m wide. Each bin holds an approximately 1.0 ✕1-2 ✕1-9 m volume of soil, has a transparent Plexiglas panel for root growth observations and treatmen ...
DOI:
10.2134/agronj1974.00021962006600060038x

11. Portland Cement as a Soil Amendent for Corn and Soybeans

Author:
R. K. Stivers; D. Swartzendruber; W. E. Nyquist
Source:
Agronomy journal 1977 v.69 no.6 pp. 961-964
ISSN:
0002-1962
Subject:
A horizons; Glycine max; Hapludalfs; Zea mays; agronomy; cement; concrete; corn; crop yield; hydraulic conductivity; laboratory experimentation; regression analysis; silt loam soils; soil pH; soybeans; tile drainage; Corn Belt region
Abstract:
... In the corn belt there are many areas of imperfectly drained soils, often adjacent to well-drained soils in the same fields. Tile drainage of these imperfectly drained soils helps remove excess water within the profile. Slow movement of water into and through the Ap horizon of these soils is thought to contribute to reduced crop yields in wet years. Since application of Portland cement (the bindin ...
DOI:
10.2134/agronj1977.00021962006900060015x

12. Chemical Composition of Feedlot Manure

Author:
G. M. Ward; T. V. Muscato; D. A. Hill; R. W. Hansen
Source:
Journal of environmental quality 1978 v.7 no.2 pp. 159-164
ISSN:
0047-2425
Subject:
acid detergent fiber; animal manures; cellulose; concrete; feedlots; hemicellulose; lignin; neutral detergent fiber; pH; sodium; soil; temperature; total nitrogen
Abstract:
... Manure samples were collected over a 10-mo period from a feedlot with conventional pens and pens in which about one-half the surface was covered with concrete. Samples were collected from the front, middle, and rear of each pen for each sampling period. The average percentages of 139 samples on a dry matter basis were: dry matter, 58.5; ash, 37.0; total N, 2.32; neutral detergent fiber, 45.9; acid ...
DOI:
10.2134/jeq1978.00472425000700020001x

13. Experimental Investigations of Disturbance and Ecological Succession in a Rocky Intertidal Algal Community

Author:
Wayne P. Sousa
Source:
Ecological monographs 1979 v.49 no.3 pp. 227-254
ISSN:
0012-9615
Subject:
Bacillariophyceae; Chthamalus; Gelidium; Gigartina; Rhodoglossum; Ulva; algae; asexual reproduction; autumn; canopy; concrete; crabs; ecological succession; epiphytes; field experimentation; grazing; limpets; littoral zone; mature plants; models; natural enemies; regrowth; spores; winter; California
Abstract:
... Mechanisms of ecological succession were investigated by field experiments in a rocky intertidal algal community in southern California. The study site was algal—dominated boulder field in the low intertidal zone. The major form of natural disturbance which clears space in this system is the overturning of boulders by wave action. Algal populations recolonize cleared surfaces either through vegeta ...
DOI:
10.2307/1942484

14. Consumption of wood by artificially isolated colonies of the fungus-growing termite macrotermes bellicosus

Author:
COLLINS, N.M.
Source:
Entomologia experimentalis et applicata 1981 v.29 no.3 pp. 313-320
ISSN:
0013-8703
Subject:
Macrotermes bellicosus; biomass; concrete; fungi; tanks; wood
Abstract:
... Four colonies of the fungus-growing termite Macrotermes bellicosus (Smeathman) (Isoptera: Termitidae: Macrotermitinae) were transferred to concrete isolation tanks for measurement of feeding rates. The colonies were offered wooden baits at densities ranging from 25 to 1000 per tank. Maximum consumption during 4-day trials ranged from 94-149 mg g⁻¹d⁻¹. These results compare favourably with field es ...
DOI:
10.1111/j.1570-7458.1981.tb03074.x

15. Managing Runoff from a Small, Paved Beef Feedlot

Author:
W. M. Edwards; L. B. Owens; R. K. White
Source:
Journal of environmental quality 1983 v.12 no.2 pp. 281-286
ISSN:
0047-2425
Subject:
autumn; basins; beef cattle; biochemical oxygen demand; calf feeding; calves; chemical oxygen demand; concrete; corn; corn silage; feedlots; filter strips; markets; rain; steers; storms; stormwater; total nitrogen; total phosphorus; total solids; winter
Abstract:
... Each year for 3 y, 56 steer calves were fed to market weight on a corn-silage and shelled-corn ration in a 243-m² paved lot. Storm runoff was measured and sampled as it left the feedlot, and again after it passed through a shallow, concrete settling basin and two consecutive 30 m long by 4.5 m wide sod filter strips. Storm runoff amounts and transport of TS (total solids), COD (chemical oxygen dem ...
DOI:
10.2134/jeq1983.00472425001200020026x

16. Preparation of Large Core Samples from Stony Soils

Author:
B. Buchter; J. Leuenberger; P. J. Wierenga; F. Richard
Source:
Soil Science Society of America journal 1984 v.48 no.6 pp. 1460-1462
ISSN:
0361-5995
Subject:
circular saws; concrete; stony soils
Abstract:
... A method was developed to take large, undisturbed soil cores in stony soils. An undisturbed soil core was surrounded with concrete, frozen to −22°C and cut to shape with a diamond circular saw, leaving only core sample. The core sample was surrounded with paraffin to maintain its shape. ...
DOI:
10.2136/sssaj1984.03615995004800060053x

17. Two Types of Runoff Control Systems For Open Concrete Swine Feedlots

Author:
A. L. Sutton; D. D. Jones; D. T. Kelly; D. H. Bache
Source:
Applied engineering in agriculture 1986 v.2 no.2 pp. 193-198
ISSN:
0883-8542
Subject:
absorption; agricultural engineering; animal manure management; basins; body weight; cleaning; concrete; energy costs; feedlots; fertilizers; irrigation; labor; nutrient content; nutrients; odor control; runoff; silt loam soils; silty clay loam soils; soil solution; swine
Abstract:
... Two types of runoff control sytems were evaluated with open concrete swine feedlots. At one location, an infiltration channel-vegetative filter system was used on a silty loam soil for infiltration of treated runoff. At the second location, a detention pond for runoff storage was used due to a heavy textured, poorly drained silty clay loam soil. Concrete settling basins were used to treat runoff b ...
DOI:
10.13031/2013.26740

18. Extinction of an Island Forest Avifauna by an Introduced Snake

Author:
Julie A. Savidge
Source:
Ecology 1987 v.68 no.3 pp. 660-668
ISSN:
0012-9658
Subject:
Boiga irregularis; birds; concrete; diet; eggs; extinction; forests; funnel traps; habitats; lizards; nesting; nestlings; predation; roosting behavior; savannas; second growth; small mammals; snakes; urban areas; Guam
Abstract:
... The island of Guam has experienced a precipitous decline of its native forest birds, and several lines of evidence implicate the introduced brown tree snake (Boiga irregularis) as the cause of the range reductions and extinctions. The range expansion of B. irregularis correlated well with the range contraction of the forest avifauna. Exceptionally high predation by snakes on bird—baited funnel tra ...
DOI:
10.2307/1938471

19. Preparation of Large Cross Sections from Stony Soils

Author:
B. Buchter; J. Leuenberger; F. Richard; H. Flühler; H. M. Selim
Source:
Soil Science Society of America journal 1987 v.51 no.2 pp. 494-495
ISSN:
0361-5995
Subject:
circular saws; concrete; cutting; drying; epoxides; soil profiles; soil sampling; stony soils
Abstract:
... A method was developed to obtain large, undisturbed soil samples for the description of structural properties in soils containing large amounts of coarse fragments. The dimensions of the sample were 0.5 by 0.8 by 1.8 m which extended to the entire depth of the soil profile. The method involved surrounding the sample with concrete; drying and impregnating it with epoxy resin; and cutting it into cr ...
DOI:
10.2136/sssaj1987.03615995005100020046x

20. Economic Analysis of Combining Partial House Brooding and Use of Off-Peak Energy for Poultry Production

Author:
Garrett L. Van Wicklen; Robert H. Brown
Source:
Applied engineering in agriculture 1989 v.5 no.1 pp. 91-98
ISSN:
0883-8542
Subject:
birds; brooders; concrete; electric power; energy; liquid petroleum gas; operating costs; poultry; poultry production; prices; slabs
Abstract:
... Two alternatives to brooding poultry are presented that use off-peak electric energy and partial house brooding. System I uses electric heating mats embedded in a floor of concrete slabs, while System II circulates heated water through a network of PVC pipe resting on the litter surface. The predicted costs of the alternative systems were compared to the cost of LP gas brooding with pancake broode ...
DOI:
10.13031/2013.26484

21. Rubber Latex Encasement of Undisturbed Cores for Water Flow and Potential Measurements

Author:
M. D. Tomer; A. H. Ferguson
Source:
Soil Science Society of America journal 1989 v.53 no.1 pp. 305-308
ISSN:
0361-5995
Subject:
cement; concrete; desorption; disturbed soils; drainage; evaporation; latex; liquids; poly(vinyl chloride); rubber; soil sampling; vermiculite; water flow
Abstract:
... A method of collection of minimally disturbed soil cores for use in laboratory studies is described. Cores were obtained with a standard soil sampling tube. The cores were then centered in a larger diameter PVC tube and covered with a liquid rubber latex molding compound that dries to a form fitting layer around the sample. The latex was covered with a thin layer of wax to prevent evaporation and ...
DOI:
10.2136/sssaj1989.03615995005300010058x

22. Contribution of Nitrogen Fixation to Sugar Cane: Nitrogen-15 and Nitrogen-Balance Estimates

Author:
Segundo Urquiaga; Kátia H.S. Cruz; Robert M. Boddey
Source:
Soil Science Society of America journal 1992 v.56 no.1 pp. 105-114
ISSN:
0361-5995
Subject:
Brachiaria; Saccharum barberi; Saccharum officinarum; Saccharum spontaneum; concrete; cultivars; grasses; hybrids; isotope dilution technique; isotope labeling; nitrogen; nitrogen balance; nitrogen fixation; nitrogen-fixing bacteria; phytomass; roots; shade; soil; soil minerals; stable isotopes; sugarcane; Brazil
Abstract:
... Continuous sugarcane (Saccharum spp.) culture in Brazil, with low N inputs and almost total removal of plant biomass at each harvest, has not depleted soil N reserves. This, and high numbers of N₂-fixing bacteria associated with the plants, suggests that the crop may be obtaining considerable N from biological nitrogen fixation (BNF). This 3-yr study assessed the importance of such contributions t ...
DOI:
10.2136/sssaj1992.03615995005600010017x

23. Vegetative Filter Treatment of Dairy Barnyard Runoff in Cold Regions

Author:
G. R. Schellinger; J. C. Clausen
Source:
Journal of environmental quality 1992 v.21 no.1 pp. 40-45
ISSN:
0047-2425
Subject:
bacteria; cold zones; concrete; dairy farming; growing season; nitrogen content; overland flow; preferential flow; runoff; snowmelt; subsurface drainage; tiles; total phosphorus; total suspended solids; Vermont
Abstract:
... A vegetative filter strip was installed to treat barnyard runoff from an active dairy farm in Vermont. Runoff from a concrete surfaced barnyard flowed through a detention pond, then onto a vegetative filter strip measuring 22.9 m by 7.6 m with a 2% slope. The water input and surface and subsurface outputs for the strip were continuously monitored from December 1984 through May 1986. Of the total b ...
DOI:
10.2134/jeq1992.00472425002100010005x

24. Comparison of interior coatings to control surface microbiological contamination

Author:
Ha, S.D.; Ricke, S.C.; Carey, J.B.; Denton, J.H.
Source:
Journal of applied poultry research 1995 v.4 no.1 pp. 7-12
ISSN:
1056-6171
Subject:
poultry products; food processing; microbial contamination; coatings; latex; concrete; Listeria monocytogenes; Pseudomonas fluorescens; plate count; cleaning; disinfectants; Paint (horse breed)
DOI:
10.1093/japr/4.1.7

25. Operational Experience with Biological Aerated Filters

Author:
G. Wheale; G. d. cooper‐smith
Source:
Water and environment journal 1995 v.9 no.2 pp. 109-118
ISSN:
1747-6585
Subject:
ammonium nitrogen; biochemical oxygen demand; biofilters; biological treatment; compliance; concrete; effluents; humus; nitrification; nitrogen; sewage treatment; steel; wastewater treatment; England
Abstract:
... Yorkshire Water has two full‐scale biological aerated filters in operation. The first was installed at North Bierley sewage‐treatment works for the tertiary nitrification of humus―tank effluent to secure consent compliance and ascertain if anticipated future standards could be achieved. The second was recently commissioned at Hedon sewage‐treatment works for secondary treatment, as part of ...
DOI:
10.1111/j.1747-6593.1995.tb01600.x

26. Chinese experience on plastic membrane-concrete thin slab lining for canals

Author:
Chengchun, K.E.; Singh, V.P.
Source:
Irrigation and drainage systems 1996 v.10 no.1 pp. 77-94
ISSN:
0168-6291
Subject:
irrigation canals; concrete; poly(vinyl chloride); seepage; plastic film; China
DOI:
10.1007/BF01102765

27. Aquagel-based lightweight concentrate

Author:
Glenn, G.M.
Source:
United States Department of Agriculture patents 1997 pp. -
Subject:
concrete; chemical composition; gels; aqueous concentrates; weight; density; patents; USDA; thermal conductivity; United States
Abstract:
... The present invention is directed to concrete compositions prepared using firm aqueous gels (aquagels) as all or part of the aggregate in a concrete mix. The concrete sets around the aquagels in the initial set stage. Because the aquagels maintain the pore structure of the concrete while it sets, a concrete product can be obtained that has substantially uniform density regardless of depth. During ...
Handle:
10113/5466

28. Calcium Sulfate as a Flocculant to Reduce Sedimentation Basin Water Turbidity

Author:
A. Przepiora; D. Hesterberg; J. E. Parsons; J. W. Gilliam; D. K. Cassel; W. Faircloth
Source:
Journal of environmental quality 1997 v.26 no.6 pp. 1605-1611
ISSN:
0047-2425
Subject:
application rate; basins; calcium sulfate; concrete; electrical conductivity; flocculants; flocculation; hydrochemistry; laboratory experimentation; pH; phosphogypsum; piedmont; plaster; surface water; surveys; temporal variation; turbidity; water quality; North Carolina
Abstract:
... A high-suspended solids load in surface waters is one of the biggest water quality problems in the Piedmont region of the southeastern USA. Sedimentation basins at construction sites are designed to reduce suspended solids in discharged water, but they are not effective in reducing turbidity. A survey of sedimentation basin water at two urban construction sites showed that turbidity levels during ...
DOI:
10.2134/jeq1997.00472425002600060021x

29. Differential effectiveness of deltamethrin dust on plywood, concrete, and tile surfaces against three stored-product beetles

Author:
Arthur, F.H.
Source:
Journal of stored products research 1997 v.33 no.2 pp. 167-173
ISSN:
0022-474X
Subject:
Tribolium confusum; Tribolium castaneum; Rhyzopertha dominica; deltamethrin; plywood; concrete; tiles; residual effects; mortality; toxicity; insect control; storage pests
Abstract:
... Plywood, concrete, and tile panels measuring 0.094 m2 were treated with 0.05% deltamethrin dust at the rate of 3.54 g per m2 and bioassayed each week for 21 weeks with Tribolium confusum (J. duVal), Tribolium castaneum (Herbst), and Rhyzopertha dominica (F.). Insects were exposed for 24 h, then either removed from the treated surface and held for 96 h (recovery study) or kept on the treated surfac ...
Handle:
10113/12563
DOI:
10.1016/S0022-474X(96)00041-0

30. Formation of chloroaluminates in calcium aluminate cements cured at high temperatures and exposed to chloride solutions

Author:
M. A Sanjuan
Source:
Journal of materials science 1997 v.32 no.23 pp. 6207-6213
ISSN:
0022-2461
Subject:
X-radiation; X-ray diffraction; cement; chemical composition; concrete; corrosion; electron microscopy; ions; microstructure; risk; sodium chloride; temperature
Abstract:
... The formation of hexagonal chloroaluminates in mortar specimens pre-cured at 20, 40 and 60°C for two weeks and stored in a 0.5 M NaCl solution for up to 255 days has been studied. The appearance of this phase as a function of time has been monitored by X-ray diffraction. In addition, its microstructure has been observed by means of backscattering electron microscopy. The chemical composition was s ...
DOI:
10.1023/A:1018624824702

31. Inhibition of Sulfur Oxidizing Activity by Nickel Ion in Thiobacillus thiooxidans NB1–3 Isolated from the Corroded Concrete

Author:
Yasuo Nogami; Terunobu Maeda; Atsunori Negishi; Tsuyoshi Sugio
Source:
Bioscience, biotechnology, and biochemistry 1997 v.61 no.8 pp. 1373-1375
ISSN:
1347-6947
Subject:
Thiobacillus thiooxidans; antimycin A; bacteria; biotechnology; cell growth; concrete; corrosion; mammals; nickel; oxidation; plasma membrane; sulfates; sulfite oxidase; sulfites; sulfur
Abstract:
... It is of great importance to find ways to protect concrete from corrosion, to maintain the concrete structure for a long time. A sulfur-oxidizing bacterium, Thiobacillus thiooxidans, has been known to play a crucial role in concrete corrosion and the concrete supplemented with nickel was resistant to corrosion. To obtain biological bases of this Ni protection, the effects of Ni on sulfur dioxygena ...
DOI:
10.1271/bbb.61.1373

32. Spatial and temporal distribution of house dust mite (Astigmata: Pyroglyphidae) allergens Der p 1 and Der f 1 in Barbadian homes

Author:
Barnes, K.C.; Fernandez-Caldas, E.; Trudeau, W.L.; Milne, D.E.; Brenner, R.J.
Source:
Journal of medical entomology 1997 v.34 no.2 pp. 212-218
ISSN:
0022-2585
Subject:
Dermatophagoides pteronyssinus; Dermatophagoides farinae; dust mites; allergens; spatial distribution; seasonal variation; dry season; wet season; building construction; wood; concrete; Barbados
Abstract:
... House features contribute to house dust mite abundance and, therefore, exposure to mite allergens. Our study assessed the hypothesis that modernization of the domestic environment in a tropical setting may lead to a level of allergen from the house dust mites Dermatophagoides pteronyssinus (Trouessart) and D. farinae Hughes that previously has been defined clinically as at risk for people who suff ...
DOI:
10.1093/jmedent/34.2.212

33. Using a biologically enhanced permeable barrier

Author:
Borden, R.C.; Goin, R.T.; Kao, C.M.
Source:
Ground water monitoring & remediation 1997 v.17 no.1 pp. 70-80
ISSN:
1069-3629
Subject:
aquifers; wells; groundwater; groundwater contamination; soil pollution; benzene; toluene; xylene; isomers; oxygen; concrete; permeability; groundwater flow; pollution control
Abstract:
... A permeable barrier system, consisting of a line of closely spaced wells, was installed perpendicular to ground water flow to control the migration of a dissolved hydrocarbon plume. The wells were charged with concrete briquets that release oxygen and nitrate at a controlled rate, enhancing aerobic biodegradation in the downgradient aquifer. Laboratory batch reactor experiments were conducted to i ...
DOI:
10.1111/j.1745-6592.1997.tb01186.x

34. Effects of a food source on red flour beetle (Coleoptera: Tenebrionidae) survival after exposure on concrete treated with cyfluthrin

Author:
Arthur, F.H.
Source:
Journal of economic entomology 1998 v.91 no.3 pp. 773-778
ISSN:
0022-0493
Subject:
Tribolium castaneum; residual effects; wheat flour; mortality; insecticide residues; cyfluthrin; storage pests; concrete; insect control
Abstract:
... The effects of a flour food source on survivorship of red flour beetles, Tribolium castaneum (Herbst), were determined after beetles were exposed every 2 wk for 16 wk for intervals of 15-120 min on concrete treated with cyfluthrin wettable powder. Knockdown generally increased as exposure interval increased but declined as residues aged. After week 4, survival was usually >60% at all exposure inte ...
DOI:
10.1093/jee/91.3.773

35. Isolation of a Sulfur-oxidizing Bacterium That can Grow under Alkaline pH, from Corroded Concrete

Author:
Terunobu MAEDA; Atsunori NEGISHI; Yuko OSHIMA; Yasuo NOGAMI; Kazuo KAMIMURA; Tsuyoshi SUGIO
Source:
Bioscience, biotechnology, and biochemistry 1998 v.62 no.6 pp. 1087-1092
ISSN:
1347-6947
Subject:
DNA; Paracoccus versutus; Thiobacillus thiooxidans; bacteria; biotechnology; calcium; calcium hydroxide; concrete; corrosion; energy; enzymes; glucose; pH; sodium nitrate; sulfides; sulfites; sulfur; temperature; thiosulfates
Abstract:
... To study the early stages of concrete corrosion by bacteria, sulfur-oxidizing bacterium strain RO-1, which grows in an alkaline thiosulfate medium (pH 10.0) was isolated from corroded concreate and characterized. Strain RO-1 was a Gram negative, rod-shaped bacterium (0.5-0.6×0.9-1.5 μm). The mean G+C content of the DNA of strain RO-1 was 65.0 mol%. Optimum pH and temperature for growth were 8.0. a ...
DOI:
10.1271/bbb.62.1087

36. Modeling a concrete block irrigation diversion system

Author:
Sanford, P.; Cahoon, J.; Hughes, T.
Source:
Journal of the American Water Resources Association 1998 v.34 no.5 pp. 1179-1187
ISSN:
1093-474X
Subject:
irrigation water; concrete; water flow; models; river water; Montana
Abstract:
... Concrete block irrigation diversion systems have been proposed as alternatives to permanent dams of concrete or rock or temporary gravel berms. Permanent dams can cause stream channel instability, bank erosion, sediment pollution, ice flow blockage, ant safety problems for recreational floating craft. Temporary berms can require substantial streambed disturbance and can promote sediment pollution, ...
DOI:
10.1111/j.1752-1688.1998.tb04163.x

37. Residual studies with cyfluthrin wettable powder: toxicity toward red flour beetles (Coleoptera: Tenebrionidae) exposed for short intervals on treated concrete

Author:
Arthur, F.H.
Source:
Journal of economic entomology 1998 v.91 no.1 pp. 309-319
ISSN:
0022-0493
Subject:
Tribolium castaneum; cyfluthrin; toxicity; insecticide residues; residual effects; mortality; wettable powders; concrete; storage pests; insect control; environmental exposure; application rate
Abstract:
... Red flour beetles, Tribolium castaneum (Herbst), were exposed for 0.5, 1, 2, and 4 h on concrete treated with 20% cyfluthrin wettable powder at rates of 100, 150, and 200 mg (20, 30, and 40 mg [AI]/m2). Beetle recovery was assessed at 0, 24, 48, and 168 h postexposure, and residual bioassays were conducted at 3-wk intervals for 24 wk after treatment. At the low application rate of 100 mg/m2, initi ...
DOI:
10.1093/jee/91.1.309

38. Residual toxicity of cyfluthrin wettable powder against Tribolium confusum (Coleoptera: Tenebrionidae) exposed for short time intervals on concrete

Author:
Arthur, F.H.
Source:
Journal of stored products research 1998 v.34 no.1 pp. 19-25
ISSN:
0022-474X
Subject:
Tribolium confusum; cyfluthrin; insecticide residues; residual effects; toxicity; mortality; wettable powders; duration; concrete; storage pests; insect control; application rate; environmental exposure
Abstract:
... Adults of Tribolium confusum du Val, the confused flour beetle, were exposed to concrete treated with 100, 150, and 200 mg cyfluthrin 20% WP (20, 30, and 40 mg[a.i.]) per m2 for 0.5, 1.0, 2.0, and 4.0 h at tri-weekly intervals for 24 weeks after the concrete was treated. Exposure temperature was approximately 22 degrees C and relative humidity was approximately 60%. At the lowest application rate ...
Handle:
10113/12565
DOI:
10.1016/S0022-474X(97)00037-4

39. Effect of temperature on residual toxicity of cyfluthrin wettable powder

Author:
Arthur, F.H.
Source:
Journal of economic entomology 1999 v.92 no.3 pp. 695-699
ISSN:
0022-0493
Subject:
Tribolium castaneum; cyfluthrin; wettable powders; temperature; insecticide residues; residual effects; toxicity; mortality; storage pests; insect control; concrete; environmental exposure
Abstract:
... Red flour beetles, Tribolium castaneum (Herbst), were exposed for 0.5, 1, and 2 h at 20, 25, 30, and 35 degrees C on concrete treated with 100 mg/m(2) 20% (AI) cyfluthrin wettable powder (WP) at biweekly intervals for 8 wk. Knockdown typically averaged 80-100% at all exposure intervals and temperatures until week 8, with no significant differences among temperatures. Although the overall F-test in ...
Handle:
10113/12571
DOI:
10.1093/jee/92.3.695

40. Foot lesions in finishing pigs and their associations with the type of floor

Author:
Mouttotou, N.; Hatchell, F.M.; Green, L.E.
Source:
Veterinary record 1999 v.144 no.23 pp. 629-632
ISSN:
0042-4900
Subject:
swine; feet; incidence; straw; concrete; floors
DOI:
10.1136/vr.144.23.629
PubMed:
10399243

41. Importance of Microscopy in Durability Studies of Solidified and Stabilized Contaminated Soils

Author:
I. Klich; L. P. Wilding; L. R. Drees; E. R. Landa
Source:
Soil Science Society of America journal 1999 v.63 no.5 pp. 1274-1283
ISSN:
0361-5995
Subject:
United States Environmental Protection Agency; carbonation; cement; chemical analysis; concrete; cracking; durability; freeze-thaw cycles; leaching; metals; minerals; polluted soils; scanning electron microscopy; solidification; transmission electron microscopy; wastes; weathering
Abstract:
... Solidification/stabilization (S/S) is recognized by the U.S. EPA as a best demonstrated available technology for the containment of contaminated soils and other hazardous wastes that cannot be destroyed by chemical, thermal, or biological means. Despite the increased use of S/S technologies, little research has been conducted on the weathering and degradation of solidified and stabilized wastes on ...
DOI:
10.2136/sssaj1999.6351274x

42. Residual susceptibility of fifth instar Plodia interpunctella to cyfluthrin wettable powder

Author:
Arthur, F.H.
Source:
Journal of stored products research 1999 v.35 no.1 pp. 99-105
ISSN:
0022-474X
Subject:
Plodia interpunctella; cyfluthrin; wettable powders; insecticide residues; concrete; larvae; biological development; eclosion; insect control; storage pests; application rate; pupation
Abstract:
... Wandering-phase fifth instar Plodia interpunctella (Hubner) were exposed at 3-week intervals for 0.5, 1, 2, and 4 h on concrete treated with sprays of 100, 150 and 200 mg 20% cyfluthrin wettable powder (WP) per m(2) over a 15-week period. Pupation rate and adult emergence were not significantly different (P greater than or equal to 0.05) with respect to exposure interval at any application rate. O ...
Handle:
10113/12568
DOI:
10.1016/S0022-474X(98)00016-2

43. Size and edge effects of concrete plots on chlorpyrifos degradation in sub-slab sand

Author:
Su, N.Y.; Ban, P.M.; Chew, V.; Scheffrahn, R.H.
Source:
Journal of economic entomology 1999 v.92 no.2 pp. 409-415
ISSN:
0022-0493
Subject:
chlorpyrifos; soil treatment; sand; longevity; degradation; concrete; slabs; insecticide residues; Coptotermes formosanus; Reticulitermes flavipes; mortality; chemical control
Abstract:
... Chlorpyrifos degradation in sub-slab sand was studied using concrete plots of small or large (16X) size. Degradation half-life (k) for chlorpyrifos in sub-slab sand from small plots was faster (approximately equal to 4.5 mo) than that measured from any of the 3 distance zones of large plots (approximately equal to 15.9-21.6 mo). There was a tendency for more rapid degradation toward the slab edge ...
DOI:
10.1093/jee/92.2.409

44. Survival of red flour beetles (Coleoptera: Tenebrionidae) on concrete partially treated with cyfluthrin

Author:
Arthur, F.H.
Source:
Journal of economic entomology 1999 v.92 no.4 pp. 981-987
ISSN:
0022-0493
Subject:
Tribolium castaneum; cyfluthrin; wettable powders; concrete; mortality; population density; storage pests; insect control; residual effects
Abstract:
... Different densities of red flour beetles, Tribolium castaneum (Herbst), were exposed for 1 h on concrete with 20, 40, 60, or 80% of the total area treated with 200 mg/m(2) of 20% [(AI)] cyfluthrin wettable powder. Residual bioassays were repeated 4 times at monthly intervals. Population density did not affect knockdown or survival of red flour beetles. The percentage of beetles still mobile after ...
Handle:
10113/12573
DOI:
10.1093/jee/92.4.981

45. Survival of verocytotoxin-producing Escherichia coli O157 under simulated farm conditions

Author:
Randall, L.P.; Wray, C.; Davies, R.H.
Source:
Veterinary record 1999 v.145 no.17 pp. 500-501
ISSN:
0042-4900
Subject:
Escherichia coli; mortality; cattle; feces; wood; concrete; straw; verotoxins; tap water; rain; plate count; river water
DOI:
10.1136/vr.145.17.500
PubMed:
10596875

46. Vegetation ecology of primeval and managed forests. Comparison of Tilio-Carpinetum-stands in the Bialowieza forest area (Northeastern Poland)

Author:
Anton Fischer; Clemens Abs; J. B. Falinski
Source:
Forstwissenschaftliches Centralblatt 1999 v.118 no.1-6 pp. 181-196
ISSN:
0015-8003
Subject:
Quercus; buried seeds; concrete; dead wood; forest reserves; forest stands; forests; mortality; national parks; phytosociology; shrubs; stand structure; trees; Central European region; Poland
Abstract:
... As the number of representative primeval forest stands in Central Europe is extremely small concrete ideas about their specific features are scarce. The near natural (“primeval”) forests of Bialowieza National Park/Northeastern Poland and the surrounding managed stands allow an exemplary study of this subject. The composition of field layer and soil seed bank as well as the structure of the tree a ...
DOI:
10.1007/BF02768986

47. The truth behind the legend: European doctors in pre-colonial India

Author:
Rajesh Kochhar
Source:
Journal of biosciences 1999 v.24 no.3 pp. 259-268
ISSN:
0250-5991
Subject:
concrete; medical history; physicians; India
Abstract:
... The aim of this article is to point out that the medical history of India in the seventeenth century needs to be studied for its bearing on the history of medical science in this country. During the period 1644–1717, European physicians in India were sought and pampered by the Indian ruling class. English doctors were able to translate this professional goodwill into concrete commercial concession ...
DOI:
10.1007/BF02941239

48. Impact of accumulated food on survival of Tribolium castaneum on concrete treated with cyfluthrin wettable powder

Author:
Arthur, F.H.
Source:
Journal of stored products research 2000 v.36 no.1 pp. 15-23
ISSN:
0022-474X
Subject:
Tribolium castaneum; cyfluthrin; wettable powders; concrete; residual effects; wheat flour; sawdust; wheat; mortality; storage pests; insect control; environmental exposure
Abstract:
... Experiments were conducted to determine if the presence of wheat flour and other substrates would affect the residual efficacy of 20% cyfluthrin wettable powder applied to concrete at the low label rate of 100 mg (20 mg [AI])/m2. Adults of Tribolium castaneum (Herbst), the red flour beetle, were exposed for 2 h on treated concrete covered with wheat flour, then removed and held for 1 week without ...
Handle:
10113/12576
DOI:
10.1016/S0022-474X(99)00022-3

49. Cementitious bond degradation during cyclic shear loading, studied by contact electrical resistance measurement

Author:
Jingyao Cao; D. D. L. Chung
Source:
Journal of materials science 2001 v.36 no.18 pp. 4345-4349
ISSN:
0022-2461
Subject:
concrete; electrical resistance; steel
Abstract:
... Degradation of the cementitious bond between steel rebar and concrete and that between old and new mortar under cyclic shear loading was observed nondestructively by measuring the contact electrical resistance of the joint. Degradation, which caused a decrease in bond strength but no visual damage, was indicated by an abrupt increase in the resistance at a small fraction of the fatigue life. Bond ...
DOI:
10.1023/A:1017997728355

50. Defect dynamics and damage of cement-based materials, studied by electrical resistance measurement

Author:
Jingyao Cao; Sihai Wen; D. D. L. Chung
Source:
Journal of materials science 2001 v.36 no.18 pp. 4351-4360
ISSN:
0022-2461
Subject:
cement; concrete; electrical resistance; monitoring; sand; silica
Abstract:
... Defect dynamics, as studied by DC electrical resistance measurement during repeated compression of cement paste, mortar and concrete in the elastic regime, are characterized by defect generation that dominates during the first loading, defect healing that dominates during subsequent loading, and defect aggravation that dominates during subsequent unloading. The interface between sand and cement, t ...
DOI:
10.1023/A:1017901929264