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Articles 76081 - 76110 of 78596
Full-Text Articles in Entire DC Network
Ten-Year Index To The Prairie Naturalist Vols. 1-10 (1968-1978), Virginia Steinhaus
Ten-Year Index To The Prairie Naturalist Vols. 1-10 (1968-1978), Virginia Steinhaus
The Prairie Naturalist
11 pages
From: ACANTHOMYOPS CLAVIGER,
to: Zink, R.M.,
The Effects Of Sulphur Dioxide On Selected Hepatics, Steven L. Gatchel
The Effects Of Sulphur Dioxide On Selected Hepatics, Steven L. Gatchel
Masters Theses
Extensive studies have been reported on the air pollutant sulphur dioxide (SO2), and its effects on vascular and nonvascular plants. It has been shown to interrupt normal physiology, metabolism, reproduction, and alter the plant’s morphology.
Of the cryptogams, lichens have been extensively used as biological indicators of air pollution. More recently, bryophytes have been shown to be as sensitive to contaminates as lichens, and may exhibit responses to the pollutant similar to those of vascular and nonvascular plants. The threshold sensitivity of these cryptogams is about 0.5 ppm over a 12 hour period. However no study to date …
Cost-Effectiveness Of Air Pollution Control In Illinois, 1970-1976, Timothy E. Sullivan
Cost-Effectiveness Of Air Pollution Control In Illinois, 1970-1976, Timothy E. Sullivan
Masters Theses
No abstract provided.
Direct Determination Of Pentachlorophenol By Differential Pulse Polarography, Albert L. Wade
Direct Determination Of Pentachlorophenol By Differential Pulse Polarography, Albert L. Wade
Theses and Dissertations
Concern over environmental contamination leading to the introduction of pentachlorophenol into human and animal systems has resulted in the need for a rapid and direct method for determining trace concentrations of this highly toxic compound. A direct electrochemical procedure has been developed for determining trace conccentrations of this phenol dovm to 0.27 ppm. This method uses the electrochemical techniques of differential pulse polarography at the dropping mercury electrode, and differential pulse voltammetry at the carbon paste electrode to reduce pentachlorophenol for this determination. Cyclic voltammetry at the hanging mercury drop electrode has been used to characterize the reaction behavior of …
Carotenoids In Niphargus Casimiriensis Skalski (Amphipoda) From Artesian Wells, B. Czeczuga, A. Skalski
Carotenoids In Niphargus Casimiriensis Skalski (Amphipoda) From Artesian Wells, B. Czeczuga, A. Skalski
International Journal of Speleology
By means of columnar and thin-layer chromatography, the presence of carotenoids in Niphargus casimiriensis Skalski from an artesian well was studied. There are qualitative and quantitative differences in the carotenoid contents of the Niphargus casimiriensis Skalski specimens.
Bogidiella Martini, Un Nouvel Amphipode Souterrain De I'Ile Saint-Martin (Antilles) Et La Zoogéographie Des Bogidiellidae, Jan H. Stock
Bogidiella Martini, Un Nouvel Amphipode Souterrain De I'Ile Saint-Martin (Antilles) Et La Zoogéographie Des Bogidiellidae, Jan H. Stock
International Journal of Speleology
Both sexes of a new species of Bogidiella, B. martini, are described. The new species, with a very pronounced sexual dimorphism, has been discovered in two wells in the island of St.-Martin (French part), one of the Lesser Antilles. Another member of Bogidiella has been recorded from the island of Curaçao, but the specimens were damaged too much to allow proper description. The Bogidiellidae (5 genera, 26 named species, and several unnamed species) are present in the sea as well as in inland waters. The family has a wide distribution, exceeding the boundaries of the former Tethys Sea. Probably, …
The Tegumental Glands Of A Troglobitic Crustacean, L. Juberthie-Jupeau, Y. Crouau
The Tegumental Glands Of A Troglobitic Crustacean, L. Juberthie-Jupeau, Y. Crouau
International Journal of Speleology
Tegumental glands, located in the antennae of Antromysis juberthiei are present in males and females; in the antennulae each of them consists of 3 cells: a secretory cell of large size, an intermediary cell and a canal cell probably secretory in nature. The canal cell possesses an extracellular cavity with deep infoldings and microvilli between which the canal crinkles along. The intermediary cell is heavily provided with microfilaments. The secretory granules have an organized content.
Diplopoda From Papuan Caves (Zoological Results Of The British Speleological Expedition To Papua-New Guinea, 1975, 4), Richard L. Hoffman
Diplopoda From Papuan Caves (Zoological Results Of The British Speleological Expedition To Papua-New Guinea, 1975, 4), Richard L. Hoffman
International Journal of Speleology
Eight species of polydesmoid millipeds are described from the caves of the extreme northwestern corner of Papua New Guinea. Four new genera are named: in Paradoxosomatidae, Selminosoma, type S. chapmani; Astromontosoma, type A. jeekeli; in Doratodesmidae, Scolopopyge, type S. pholeter; Selminarchus, type S. hispidus. Two additional new species are referred to established genera Eustrongylosoma exiguum and Nothrosoma beroni, the latter, however, (known only from females) is probably referable to a new genus. Selminosoma chapmani appears both from its structure and biology to be a true troglobite, the first such species known in the Paradoxosomatidae. The two doratodesmid species extend the …
Ecological Investigations Of The Influence Of A Polluted River On Surrounding Interstitial Underground Waters, Milan Meštrov, Romana Lattinger-Penko
Ecological Investigations Of The Influence Of A Polluted River On Surrounding Interstitial Underground Waters, Milan Meštrov, Romana Lattinger-Penko
International Journal of Speleology
Because of the fundamental biological investigations and also of the practical importance, the authors investigated interstitial subterranean water (hyporheic) near a polluted river Sava in the plain where the underground waters are considered as potable. With the comparison of the physical, chemical, bacteriological, saprobiological and faunistic characteristics of the river and its hyporheic zone in different seasons their mutual relation is detected. The results show the influence of polluted river water on the hyporheic water within the river bed to at least 2 m depth.
Magniezia Gardei N.Sp. (Crustacca Isopoda Asellote): Un Sténasellide Des Eaux Souterraines Du Maroc Sud-Oriental, Guy Magniez
Magniezia Gardei N.Sp. (Crustacca Isopoda Asellote): Un Sténasellide Des Eaux Souterraines Du Maroc Sud-Oriental, Guy Magniez
International Journal of Speleology
This new species has been discovered in the waters of Kef Aziza Cave, on the Saharian slopes of the High Atlas Range, Southeastern Morocco. Magniezia gardei n.sp. belongs to the same Genus as four species previously described from the phreatic waters of the Guinean area. So, it is assumed that this Moroccan species should be a relict of the ancient aquatic hypogean fauna of the entire West Africa, nowadays protected by the development of an arid climate.
Ostracodes Hypogés Du Sud De La France. 1. Mixtocandona Juberthieae N.Sp., Dan L. Danielopol
Ostracodes Hypogés Du Sud De La France. 1. Mixtocandona Juberthieae N.Sp., Dan L. Danielopol
International Journal of Speleology
The description of Mixtacandona juberthieae n.sp. is presented. The new species belongs to the group taurica and has been found in the karstic system of the Vidourle river at Sauve (Gard).
A Critical Review Of Hypotheses On The Origin Of Vermiculations, A. Bini, M. Cavalli Gori, S. Gori
A Critical Review Of Hypotheses On The Origin Of Vermiculations, A. Bini, M. Cavalli Gori, S. Gori
International Journal of Speleology
Mud and clay vermiculations are irregular and discontinuous deposits of incoherent materials, almost ubiquitous. Found both inside and outside of caves, overlying limestone or other materials, they are formed from many substances (clay, mud, candle-black, colloidal silica, etc.). Also their shape dimensions vary greatly. The following genetical hypotheses have been proposed: fossil fillings; chemico-genetical deposition; biological formation; mechanical deposition from moving water or air; clay-layer drying process (Montoriol-Pous hypothesis); physicochemical deposition from drying liquid films. The last is proposed by the authors who, having discussed the various hypotheses, give many examples and the results of some experiments. They distinguish two …
Réponses Locomotrices Du Poisson Cavernicole Astyanax Jordani (Pisces, Characidae) À Des Signaux Périodiques Et Apériodiques De Lumière Et De Température, G. Thines, M. Weyers
Réponses Locomotrices Du Poisson Cavernicole Astyanax Jordani (Pisces, Characidae) À Des Signaux Périodiques Et Apériodiques De Lumière Et De Température, G. Thines, M. Weyers
International Journal of Speleology
The locomotory activity of adult cave fishes Astyanax jordani was recorded in isolation in the following light and temperature conditions: constant conditions (100 Lx - 20°C), in a light cycle (LD:11/11 -10 Lx -100 Lx) and in a temperature cycle (11/11; 17/20, 19/22, 20/23, 27/30 °C). All longitudinal time series extended for a minimum of 30 days. Results show: (1) That no circadian regulation appears in constant conditions; (2) that passive entrainment occurs in LD (Amplitude: 90 Lx) and in periodic temperature conditions (Amplitude: 3°C). The entrainment effect damps out and varies individually; (3) that the mean activity increases with …
Microflore Et Activité De Groupements Fonctionnels Dans Les Sédiments De Trois Grottes De I'Italie Centrale, A. Pasqualini, B. Fumanti, L. Visonà
Microflore Et Activité De Groupements Fonctionnels Dans Les Sédiments De Trois Grottes De I'Italie Centrale, A. Pasqualini, B. Fumanti, L. Visonà
International Journal of Speleology
A comparative study is presented of the microflora of sediments in three caves with different trophic characteristics. Quantitative and qualitative variations of microflora were investigated for one year by studying the total microflora and the activity of the nitrogen cycle functional groups. Data were compared with those of other works of previous authors. Results show that the quantity and kind of organic matter of sediment are most important factors regulating the abundance and activity of cavernicolous microflora. The experimental part of this paper is prefaced by a digest of investigations previously carried out on cavernicolous microflora and by a report …
A Note On The Speleo-Minerals In South Korea, N. Kashima, M. S. Suh, S. K. Pae
A Note On The Speleo-Minerals In South Korea, N. Kashima, M. S. Suh, S. K. Pae
International Journal of Speleology
Description of a total of nine minerals found in ten caves of the middle Eastern part of the Korean peninsula.
The Occurrence Of Metacyclops Subdolus Kiefer (Crustacea: Copepoda) In Subterranean Waters Of Greece With Remarks On Its Systematic Status, Giuseppe Lucio Pesce
The Occurrence Of Metacyclops Subdolus Kiefer (Crustacea: Copepoda) In Subterranean Waters Of Greece With Remarks On Its Systematic Status, Giuseppe Lucio Pesce
International Journal of Speleology
The paper gives new localities for the Copepod Metacyclops subdolus from Greece and Crete together with the main morphological and ecological features of the species.
Studies Of The Cave Crayfish, Orconectes Inermis Inermis Cope (Decapoda, Cambaridae). Part Iv: Mark-Recapture Procedures For Estimating Population Size And Movements Of Individuals, Horton H. Hobbs Iii
Studies Of The Cave Crayfish, Orconectes Inermis Inermis Cope (Decapoda, Cambaridae). Part Iv: Mark-Recapture Procedures For Estimating Population Size And Movements Of Individuals, Horton H. Hobbs Iii
International Journal of Speleology
Several methods for permanently marking cavernicolous crayfishes were investigated prior to initiation of field work in Pless Cave, Lawrence County, Indiana. Internally injected ink complemented with external “painting” proved to be a most satisfactory tagging procedure. During the two-year study period 211 individuals of the troglobitic crayfish Orconectes inermis inermis Cope were marked; 96 tagged individuals were recaptured at least once, a 46% recapture rate. The population size was estimated to be 1586 +/- 79 (95% C.L.) over the 540 m subterranean stream study area and remained relatively stable during the period of 1970 to 1972. The home range of …
The Relationship Of Bottom Sediments To The Current-Generated Topography On Crumps Bank And Willoughby Bank, Southern Chesapeake Bay, Virginia, Eugene Robert Brush
The Relationship Of Bottom Sediments To The Current-Generated Topography On Crumps Bank And Willoughby Bank, Southern Chesapeake Bay, Virginia, Eugene Robert Brush
OES Theses and Dissertations
Crumps Bank and Willoughby Bank in Southern Chesapeake Bay are an area of varying topography. The area is bounded by two large bridge-tunnel spans, the dredged Thimble Shoal Channel borders it to the north, and the Ocean View section of Norfolk, Virginia lies to the south. The purpose of this investigation is to determine the relationship of the bottom sediments of Crumps Bank and Willoughby Bank.to the current-generated topography, and that this topography is the result of tidal currents.
The bathymetry, bottom sediment characteristics, bottom tidal currents, and the correlation of depth to various sediment parameters were examined to determine …
Water Resources Aspects Of Coal Transportation By Slurry Pipeline, James W. Moore
Water Resources Aspects Of Coal Transportation By Slurry Pipeline, James W. Moore
Arkansas Water Resources Center Technical Reports
No abstract provided.
Synthesis And Studies Of A Carbon-13 Labelled Chemical Carcinogen, Robert E. Royer
Synthesis And Studies Of A Carbon-13 Labelled Chemical Carcinogen, Robert E. Royer
Chemistry and Chemical Biology ETDs
Derivatives of 6-methylbenzo[a]pyrene enriched to 90% carbon-13 at the methyl carbon were synthesized. Reactions of the carcinogen, 6-chloromethylbenzo[a]pyrene, with nucleophiles under solvolytic conditions were studied kinetically and, using labelled 6-chloromethylbenzo[a]pyrene, the reaction products were studied by CMR. The purpose was to characterize the selectivity of the benzo[a]pyrenyl- 6-methyl carbonium ion in its reactions with some simple nucleophiles and with nucleosides and other nucleic acid components.
Although the solvolysis of 6-chloromethylbenzo[a]pyrene in aqueous/organic solution is first order, information about the course of the reaction can be obtained, under certain circumstances, from rate constants. Thus, if the rate of solvolysis is slowed …
Physical Studies Of Hg(Ii) And Ag(I) Dna Complexes, Dawen Ding
Physical Studies Of Hg(Ii) And Ag(I) Dna Complexes, Dawen Ding
Chemistry and Chemical Biology ETDs
The binding of Hg(II) and Ag(I) to the bases of DNA and polynucleotides induces strong absorption and CD bands. From electric dichroism studies, the transition moment of the difference absorption band at 293 nm is in the plane of the bases and has a huge negative CD band at 285 nm; while the corresponding 293 nm difference absorption band of DNA-Ag(I) complex is relatively CD inactive. A second band at 270 nm in the difference absorption spectrum of the DNA-Ag(I) complex has a large associated CD band at 270 nm. This transition is out of the plane of the bases. …
Photochemical Studies Of Hydroxo-Bridged Complexes Of Chromium (Iii), Ronald Raymond Ruminski
Photochemical Studies Of Hydroxo-Bridged Complexes Of Chromium (Iii), Ronald Raymond Ruminski
Chemistry and Chemical Biology ETDs
The acid solution and solid state photolysis in both visible and ultraviolet regions of the spectrum for µ-hydroxo-bis[pentaamminechromium(III)] chloride, and the solution photolysis in the visible and 1 traviolet region of the spectrum for µ-hydroxo-bis[pentaarnrninechr rnium(III)] perchlorate, have been studied. The ultraviolet irradiation of µ-hydroxo-bis[pentaamminechromium(III)] chloride in HCl and CHlO4 produces a redox photoproduct identified as HCrO4-, although the rate of production of HCrO4- in HClO4 is slower than in HCl. Photochemical cleavage of the hydroxo-bridge occurs in the ultraviolet photolysis of µ -hydroxo-bis[pentaanuninechromium(III)] chloride and is 1.9 times faster than the corresponding …
Volume 1, Number 5 (December 1977), The Otec Liaison
Volume 1, Number 5 (December 1977), The Otec Liaison
The OTEC Liaison
No abstract provided.
A Matter Of Understanding: An Environmental Protection Agency Film On Coyotes, F. Robert Henderson
A Matter Of Understanding: An Environmental Protection Agency Film On Coyotes, F. Robert Henderson
Great Plains Wildlife Damage Control Workshop Proceedings
This movie gives facts concerning the coyote. A better understanding of other living things will determine how responsibly we make adjustments in the environment and govern the earth we share with the coyote and other creatures.
Predation On Furbearers And Management Alternatives, Ronald D. Andrews
Predation On Furbearers And Management Alternatives, Ronald D. Andrews
Great Plains Wildlife Damage Control Workshop Proceedings
Most of the presentations from other members of the panel have discussed direct predation of one animal upon another with evidence and data to support it. Their presentations indicate that in some instances, considerable data has been collected that substantiates the fact that predation has been and can be a limiting factor in sustaining certain local animal populations. Suggestions have also been made concerning management alternatives that might help to reduce this predatory impact when desirable. Predation on furbearers and its impact is considerably more ambiguous and abstract. Facts and data concerning significant predation on furbearers, except for mink on …
Aspects Of Reproduction And Population Dynamics Of Bobcats In Wyoming, Douglas M. Crowe
Aspects Of Reproduction And Population Dynamics Of Bobcats In Wyoming, Douglas M. Crowe
Great Plains Wildlife Damage Control Workshop Proceedings
Distribution of the bobcat includes the 48 contiguous United States and limited occupance of southern Canada and northern Mexico. There are 11 subspecies, the one in Wyoming being Lynx rufus pallescens. Bobcats inhabit an amazing variety of habitat types, from northern boreal forests, southern swamp, and cane regions to the below sea level desert of Death Valley, California. Throughout this vast area, they utilize a wide variety of prey species. One study in Wyoming revealed at least 18 different species in the stomachs of bobcats; the cottontail rabbit being predominant. A similar study in New England revealed 20 different …
The Biology Of Coprinus Radians, Ozonium, Oidium, And Their Interrelationships, Thomas J. Fahey
The Biology Of Coprinus Radians, Ozonium, Oidium, And Their Interrelationships, Thomas J. Fahey
All-Inclusive List of Electronic Theses and Dissertations
The pleomorphism of Coprinus radians was studied. The three distinct growth forms--sporophore, oidial stage, and ozonium stage--were examined in relation to ultrastructure, morphology and development. Scanning and transmission electron microscopy are correlated with photomicrographs of developmental stages. Development of the oidia and of the sporophore are of particular interest. The multinucleate oidia develop quite differently from oidia as generally described for Basidiomycete imperfect stages. Development of the oidia of this Coprinus is holoblastic and sympodial. The mushroom primordia are differentiated internally into gill, cap, and stipe hyphae while only l-2mm in diameter. At this stage they look superficially like sclerotial …
Leaf Litter Processing In Aquatic Systems Two Variable Model, Boyd Jay Hanson
Leaf Litter Processing In Aquatic Systems Two Variable Model, Boyd Jay Hanson
Theses and Dissertations
The adequacy of the negative exponential model with one independent variable, days or accumulated time, as a descriptive equation for aquatic leaf litter processing was examined. The effect of adding a second independent variable, degree days or accumulated temperature, to the model was also examined. The two variable negative exponential model was shown to have at least two advantages over the single variable model. The two variable model adequately fits litter processing data for more cases than the single variable model. The expanded model also allows determination of rate coefficients for various temperature levels of the experiment rather than assuming …
Prairie Dog Management: Educational Assistance To Local Governmental Units, Edward K. Boggess
Prairie Dog Management: Educational Assistance To Local Governmental Units, Edward K. Boggess
Great Plains Wildlife Damage Control Workshop Proceedings
There is a long history of involvement between Kansas State University (formerly Kansas State Agricultural College) and township governmental units regarding control of prairie dogs. In 1901 and 1903, the Kansas legislature passed laws authorizing townships to conduct prairie dog control programs and providing funds for the College to conduct experiments on methods of controlling prairie dogs and gophers. The acts also directed the College to procure and furnish to the townships the proper prepared materials for prairie dog control. The Experiment Station began supplying strychnine baits in January of 1902 and continued this practice until 1970.
Predation On Big Game And Its Management, Samuel L. Beasom
Predation On Big Game And Its Management, Samuel L. Beasom
Great Plains Wildlife Damage Control Workshop Proceedings
This paper summarizes information from the literature and personal observation to present an overview of the effects of predators on big game populations. Specifically it examines control of prey populations, culling of inferior prey, and stimulation of prey productivity. Food habit investigations were omitted because of the impossibility of evaluating the impact of predation by this approach because of a lack of population data.