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1998

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Articles 2161 - 2190 of 2607

Full-Text Articles in Physical Sciences and Mathematics

Dixie Resource Area Proposed Resource Management Plan And Final Environmental Impact Statement, United States Bureau Of Land Management Jan 1998

Dixie Resource Area Proposed Resource Management Plan And Final Environmental Impact Statement, United States Bureau Of Land Management

All U.S. Government Documents (Utah Regional Depository)

This is the Proposed Resource Management Plan and Final Environmental Impact Statement (Proposed Plan) for the Dixie Resource Area. This document responds to public comments received on the Dixie Resource Area Draft Resource Management Plan and Environmental Impact Statement (Draft Plan). The Proposed Plan also corrects errors in the Draft Plan identified through the public comment process and internal BLM review. The Proposed Plan and associated analysis presents a refined and modified version of the Preferred Alternative and the accompanying impact analysis contained in the Draft Plan. This document is published in condensed form and should be used in conjunction …

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Grand Staircase-Escalante National Monument, Draft Management Plan, Draft Environmental Impact Statement, United States Bureau Of Land Management Jan 1998

Grand Staircase-Escalante National Monument, Draft Management Plan, Draft Environmental Impact Statement, United States Bureau Of Land Management

All U.S. Government Documents (Utah Regional Depository)

This Draft Management Plan/Draft Environmental Impact Statement describes and analyzes the impacts of five alternatives for managing the public lands within the Monument. The alternatives provide objectives and recommendations to protect and manage Monument Resources. Alternative B is BLM's preferred alternative.

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Bighorn National Forest Draft Noxious Weed Management Environmental Assessment, United States Forest Service Jan 1998

Bighorn National Forest Draft Noxious Weed Management Environmental Assessment, United States Forest Service

All U.S. Government Documents (Utah Regional Depository)

The Forest Service proposes to implement a management plan to control noxious weeds on the Bighorn National Forest. This management plan would be in accordance with general direction in the Land and Resource Management Plan (LRMP) to treat noxious farm weeds (Bighorn National Forest LRMP, III-45) to improve range conditions and manage undersirable plant species. Five additional Federal Laws also address this action: 1. The Forest and Rangeland Renewable Resources Planning Act of 1974 (RPA, P.L. 93-378). 2. The Public Rangeland Improvement Act of 1978. 3. The Federal Noxious Weed Act of 1974 Section 2(b)(2) and Section 2 of (P.L. …

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Non-Venomous Snakes, Terry A. Messmer, Gerald W. Wiscomb Jan 1998

Non-Venomous Snakes, Terry A. Messmer, Gerald W. Wiscomb

All Archived Publications

No abstract provided.

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Commensal Rodents, Ben C. West, Terry A. Messmer Jan 1998

Commensal Rodents, Ben C. West, Terry A. Messmer

All Archived Publications

No abstract provided.

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Endangered And Threatened Animals Of Utah, Terry Messmer, Marilet Zablan, Boyde Blackwell, Athena Menses, Frank Howe, Leo Lentsch, Richard Drake Jan 1998

Endangered And Threatened Animals Of Utah, Terry Messmer, Marilet Zablan, Boyde Blackwell, Athena Menses, Frank Howe, Leo Lentsch, Richard Drake

All Archived Publications

No abstract provided.

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Pocket Gophers, Gerald W. Wiscomb, Terry A. Messmer Jan 1998

Pocket Gophers, Gerald W. Wiscomb, Terry A. Messmer

All Archived Publications

No abstract provided.

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Wetland Vegetation Monitoring, 1998 Survey: Gnangara Wetlands, N. E. Pettit, R. H. Froend Jan 1998

Wetland Vegetation Monitoring, 1998 Survey: Gnangara Wetlands, N. E. Pettit, R. H. Froend

Research outputs pre 2011

Water regimes, both groundwater and surface water components dil'ectly effect distribution, health and species composition of wetland fringing vegetation. In the area of the northern Swan Coastal Plain overlying the Gnangara groundwater mound, wetland water levels and therefore the vegetation can be intimately connected to underlying groundwater levels. The Water Corporation (formerly Water Authority of Western Australia) has been drawing water from the Gnangara mound for domestic water supply for a number of years. The main objective of this study is to monitor the changes in the vegetation fringing these wetlands and to determine if this is related to changes …

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Dairy Farming And The Effects Of Agricultural, Nonpoint-Source Pollution On Stream Water Quality, Johnson Creek Watershed, Whatcom County, Washington, Max Thomas Wills Jan 1998

Dairy Farming And The Effects Of Agricultural, Nonpoint-Source Pollution On Stream Water Quality, Johnson Creek Watershed, Whatcom County, Washington, Max Thomas Wills

WWU Graduate School Collection

The Johnson Creek watershed, which supports one of the highest densities of dairy farms in Washington State, suffers from degraded stream water quality, primarily in the form of high fecal coliform concentrations, elevated nutrients, and low levels of dissolved oxygen. Despite the implementation of best management practices (BMPs) over the past two decades, poor stream water quality has persisted. The Washington State Department of Ecology (DOE) is therefore required under section 303(d) of the federal Clean Water Act, to establish a Total Maximum Daily Load (TMDL) policy for the basin as a means of remediating the impaired water bodies. The …

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Factorization For High-Energy Scattering, Ian Balitsky Jan 1998

Factorization For High-Energy Scattering, Ian Balitsky

Physics Faculty Publications

I demonstrate that the amplitude for the high-energy scattering can be factorized into a product of two independent functional integrals over “fast” and “slow” fields which interact by means of Wilson-line operators—gauge factors ordered along the straight lines.

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Geochronology And Geochemistry Of Basaltic Rocks In The Karasu Graben Around Kırıkhan (Hatay), S. Turkey, Osman Parlak, Ali̇can Kop, Ulvi̇ Can Ünlügenç, Cavi̇t Demi̇rkol Jan 1998

Geochronology And Geochemistry Of Basaltic Rocks In The Karasu Graben Around Kırıkhan (Hatay), S. Turkey, Osman Parlak, Ali̇can Kop, Ulvi̇ Can Ünlügenç, Cavi̇t Demi̇rkol

Turkish Journal of Earth Sciences

The study area, which is located in the middle sector of the Amanos mountains, covers the north of Kırıkhan (Hatay) in southern Turkey. Tectonostratigraphic rock units from Paleozoic to Cenozoic are exposed within this terrain, which is tectonically active as a result of continent-continent collision between Afro-Arabia and Eurasia. Young basaltic volcanism, located at the N-end of the Dead Sea transform fault in southern Turkey, crops out along the NE-SW trending structural lineaments within the Karasu valley (Hatay). K.Ar age determinations performed on the volcanic rocks give an age range from 0.4 Ma to 2.2 Ma that indicate Plio-Quaternary time …

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Miocene Synvolcanic Alluvial Sedimentation In Lignite-Bearing Soma Basin, Western Turkey, Uğur İnci̇ Jan 1998

Miocene Synvolcanic Alluvial Sedimentation In Lignite-Bearing Soma Basin, Western Turkey, Uğur İnci̇

Turkish Journal of Earth Sciences

Calcalkaline volcanism and volcaniclastic deposition controlled considerable mode of late Miocene sedimentation and basinal development of the lignite-bearing Soma basin in western Turkey. The volcanism-induced Denis Formation, overlying the Soma Formation discordantly, is represented by two rock assemblages: 1) In the depositional axis of the basin, green, fine-grained sandstone dominated alluvial-lacustrine deposits and, 2) In the northern margin of te basin, syn-eruptive volcaniclastic apron deposits which are mainly composed of fine and coarse-grained volcaniclastic/pyroclastic rocks and lavas. The primary volcanic rocks surrounding probably low-relief volcanoes representing near-vent assemblage are composed mainly of andesitic, rhyolitic and basaltic lavas and pyroclastics. These …

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Strain Analysis Of The Kapidagi Peninsula Shear Zone In The Ocaklargranitoid, Nw Turkey, Rahmi̇ Aksoy Jan 1998

Strain Analysis Of The Kapidagi Peninsula Shear Zone In The Ocaklargranitoid, Nw Turkey, Rahmi̇ Aksoy

Turkish Journal of Earth Sciences

The Kapidagi Peninsula shear zone is a W-to NW-trending, moderately to steeply dipping, sinistral strike-slip shear zone that runs almost parallel to the northern coast of the peninsula. It is a minimum of 28 km in length and extends from Rikoz Cape in the west to the north of Çakil village in the east. A quantitative strain analysis is presented for the shear zone evolved in the Ocaklar Granitoid by a syn-shear granitod intrusion. Deformed autoliths in the granitoids were used as strain markers. Long, intermediate and short axes of autoliths were measured in 66 subareas across the shear zone. …

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Application Of The Correspondence-Type Geostatistical Analysis On Theco, Ni, As, Ag And Au Concentrations Of The Listwaenites Fromserpentinites In The Divrigi And Kuluncak Ophiolitic Mélanges, Ali̇ Uçurum Jan 1998

Application Of The Correspondence-Type Geostatistical Analysis On Theco, Ni, As, Ag And Au Concentrations Of The Listwaenites Fromserpentinites In The Divrigi And Kuluncak Ophiolitic Mélanges, Ali̇ Uçurum

Turkish Journal of Earth Sciences

The main aim of this research was to find out correlation-if there is any-among Co, Ni, As, Ag and Au concentrations in three different listwaenite sampling sets in Divirigi and Hekimhan areas. The low temperature hydrothermal alteration of serpentinite bodies from the Divrigi and Kuluncak ophiolitic mélanges in the Cürek, Divrigi-Sivas, Güvenç and Karakuz areas, Hekimhan-Malatya, has formed two distinct types of listwaenite. Type I, is silica-carbonate listwaenite, which is dominated by silica+calcite+dolomite+ankerite±magnesite. Type II listwaenite bodies are carbonate listwaenite characterized by calcite+dolomite+ankerite ±magnesite, and lack any significant introduced silica. Correspondence-type geostatistical analysis has been thought to be the best …

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Ree Chemistry Of Arid Zone Calcrete Profiles-A Case Study From The Thar Desert, India, D. Ramakrishnan, Krishna Chandra Tiwari Jan 1998

Ree Chemistry Of Arid Zone Calcrete Profiles-A Case Study From The Thar Desert, India, D. Ramakrishnan, Krishna Chandra Tiwari

Turkish Journal of Earth Sciences

Calcrete is the widely prevalent duricrust associated with the weathering profiles of the Thar desert. The studies on REE behaviour within different weathering horizons of calcrete profiles, have revealed distinct pattern of enrichment and depletion. Fractionation of REE as evidenced through La/Lu, La/Sm, Nd/Dy ratios and removal index, are attributed to pedogenic processes such as breakdown of micas, pyroxenes, amphiboles, feldspars; removal of elements as soluble complexes; selective fixation of elements in neoformed clay minerals like montmorillonite, illite and chlorite. Sesquioxides rich Bir horizon shows enrichment of REE. REE depletion in Palaeo- Bt horizons could be due to their removal …

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Zinc Phosphide Residues In Gray-Tailed Voles (Microtus Canicaudus) Fed Fixed Particles Of A 2% Grain Bait, R. T. Sterner, D. A. Goldade, R. E. Mauldin Jan 1998

Zinc Phosphide Residues In Gray-Tailed Voles (Microtus Canicaudus) Fed Fixed Particles Of A 2% Grain Bait, R. T. Sterner, D. A. Goldade, R. E. Mauldin

USDA Wildlife Services: Staff Publications

This study measured depelted-carcass residues of zinc phosphide (Zn3P2, CAS # 1314-84-7) in 8 (4 males and 4 females) gray-tailed voles (Microtus canicaudus). Six (3 males and 3 females) voles were confined individually in 1.89 dkl (5 gal) plastic pails that contained 5,2% Zn3P2 steamrolled- oat (SRO) groats; 2 voles (1 male and 1 female) served as analytical (unbaited) controls. Four test voles (3 males and 1female) died within 7.5 h after bait exposure; whereas, 2 test voles showed no signs of toxicosis and were euthanized 7.0 h after bait exposure. …

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An Implementation Of The El Gamal Elliptic Curve Cryptosystem Over A Finite Field Of Characteristic P, Samuel Thomas Arslanian Jan 1998

An Implementation Of The El Gamal Elliptic Curve Cryptosystem Over A Finite Field Of Characteristic P, Samuel Thomas Arslanian

Electronic Theses and Dissertations

Since the earliest times, individuals and groups of individuals have been interested in communicating sensitive information in a manner which would guarantee that such information could not be arbitrarily received. Further, such information was to be received by select recipients and this required that a means of secure information transmission be found and employed. To these ends, methods of information encryption have ever since been sought and employed. The entire study and practice of this activity, cryptology, the science of message encryption and decryption, provides a framework for this thesis. In particular, the development of cryptology has been influenced by …

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Commingling Of Contrasted Magmas In Various Geodynamic Settings, Bernard Plateovet, Jean Bebien, Edilene Gomes Jan 1998

Commingling Of Contrasted Magmas In Various Geodynamic Settings, Bernard Plateovet, Jean Bebien, Edilene Gomes

Turkish Journal of Earth Sciences

Three acid-basic associations taken in various geodynamical settings are studied: the gabbro-granite association of Porto (Corsica), the associations of the Guevgueli (Greek Macedonia), and the associations of the Piracaia complex (Brazil). The diversity of field relations, the degree of mingling, the origins of the melts are debated for each association, using petrological and geochemical tools for each acid-basic association. An origin by hybridization is assumed for the intermediate rocks of the Porto association, it is tested by numerical calculation. Then, we focus on the mixing process between the comagmatic components. Mixing of melts may have happened by thorough mingling and …

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Tectono-Magmatic Evolution Of Alkaline Volcanics At Thekırka-Afyon-Isparta Structural Trend, Sw Turkey, M. Yilmaz Savaşcin, Tolga Oyman Jan 1998

Tectono-Magmatic Evolution Of Alkaline Volcanics At Thekırka-Afyon-Isparta Structural Trend, Sw Turkey, M. Yilmaz Savaşcin, Tolga Oyman

Turkish Journal of Earth Sciences

The youngest Alpine magmatism (Miocene to Quaternary) in Western and Central Anatolia is represented by three coeval assemblages from West to East. They are the Western Anatolian Volcanic assemblage (WAV), the N-S trending Kirka-Afyon-Isparta Alkaline Volcanic assemblage (KAIAV) and the Central Anatolian Volcanic Provinces (CAVP). The WAV and CAVP start with calc-alka-line volcanics and continue after Middle Miocene with shoshonitic to alkaline products of graben volcanism, while the KAIAV are all alkaline in character, without any former or later calc-alkaline contributions. The KAIAV are emplaced in three steps of alkaline vol-canic activities which exhibit southward younging along the N-S Kirka-Afyon-Isparta …

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Geochemical And Petrological Characteristics Of The Eastern Pontide Eocene (?) Alkaline Volcanic Province, Ne Turkey, Cüneyt Şen, Mehmet Arslan, Ali̇ Van Jan 1998

Geochemical And Petrological Characteristics Of The Eastern Pontide Eocene (?) Alkaline Volcanic Province, Ne Turkey, Cüneyt Şen, Mehmet Arslan, Ali̇ Van

Turkish Journal of Earth Sciences

The Eastern Pontide Alkaline Volcanic Province is developed by volcanic cycles erupted in Cenozoic era. Petrographical and geochemical data suggest presence of at least two different suits of alkaline rocks (Tonya group and Trabzon group). Petrographically, both groups consist of alkali basalt, tephrite, phonolitic tephrite, basanite, nephelinite, nepheline latite and their pyroclastic rocks. Geochemically, Tonya samples have high MgO and Ni, low LREE contents and LILE/HFSE ratios compare to Trabzon group. Preliminary studies show that these two groups of rocks are related with low level differentiation and derived from a metasomatised mantle source.

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Alkali Basalts From The Galatia Volcanic Complex, Nw Central Anatolia, Turkey, Ayla Tankut, Ni̇lgün Güleç, Marjorie Wilson, Vedat Toprak, Yilmaz Savaşçin, Orhan Akiman Jan 1998

Alkali Basalts From The Galatia Volcanic Complex, Nw Central Anatolia, Turkey, Ayla Tankut, Ni̇lgün Güleç, Marjorie Wilson, Vedat Toprak, Yilmaz Savaşçin, Orhan Akiman

Turkish Journal of Earth Sciences

Alkali basalts occur as small lava flows associated with the andesitic lava flows and pyroclastics of Early to Middle Miocene age which are the main constituents of the Galatia volcanic complex. The northern margin of the complex is bordered by the North Anatolian Fault wher eas the southern margin is surrounded by a continental sedimentary sequence which interfingers with the volcanics. New K-Ar age determinations of the basalts reveal that alkali basalts erupted at two differ ent periods of time: Early Miocene and Late Miocene. The Lower Miocene basalts are contemporaneous with the major phase of the andesitic volcanism in …

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Electrochromism Of Sol-Gel Derived Niobium Oxide Films, M. Maçek, B. Orel Jan 1998

Electrochromism Of Sol-Gel Derived Niobium Oxide Films, M. Maçek, B. Orel

Turkish Journal of Chemistry

Niobium oxide films are promising cathodic electrochromics that in many aspects can compete with the more frequently studied WO$_3$ films. The films reported herein were prepared using the sol-gel route from a NbCl$_5$ precursor. The electrochromic properties were pronounced for crystalline films that are heat-treated at 500^oC and exhibited transmittance changes between coloured and bleached states of 60 \% in the UV and 80 \% in the VIS-NIR regions. Improved bleaching and more reversible electrochromism of thick niobium oxide films (d $>$ 250 nm) were obtained by lithiation.

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Electrically Conductive Polymer Grafts Prepared By Electrochemical Polymerization Of Pyrrole Onto Poly[(Methyl Methacrylate)-Co-(2-(N-Pyrrolyl) Ethyl Methacrylate)] Electrodes, Nuran Balci, Ural Akbulut, Levent Toppare, Dietmar Stanke, Manfred L. Hallensleben Jan 1998

Electrically Conductive Polymer Grafts Prepared By Electrochemical Polymerization Of Pyrrole Onto Poly[(Methyl Methacrylate)-Co-(2-(N-Pyrrolyl) Ethyl Methacrylate)] Electrodes, Nuran Balci, Ural Akbulut, Levent Toppare, Dietmar Stanke, Manfred L. Hallensleben

Turkish Journal of Chemistry

Pyrrole was grafted on poly[(methyl methacrylate)-co-(2-(N-pyrrolyl) ethyl methacrylate)] (PMMA-co-PEMA) using constant potential electrolyses. The thermal stability of PMMA-co-PEMA was improved as a result of electrochemical grafting with pyrrole. The electrochemical behavior of the films was studied by cyclic voltammetry. Pyrrole was found to be electroactive on PMMA-co-PEMA electrodes.

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Heme Transfer Reactions: An Important Prerequisite For Synthetic Oxygen Carriers, Jan Paul, Wenhua Chen, Per-Ingvar Ohlsson, Michael Smith Jan 1998

Heme Transfer Reactions: An Important Prerequisite For Synthetic Oxygen Carriers, Jan Paul, Wenhua Chen, Per-Ingvar Ohlsson, Michael Smith

Turkish Journal of Chemistry

Electronic changes of iron- and metal free porphyrins are reviewed in light of their importance to modify the ferri/ferro reduction potential and energy dissipation between ligated carbon monoxide and the porphyrin chelate. Substitutions at positions 2 and 4 are effective ways to exercise this influence. Other measures include exposure to water and modifications of axial ligation, including the \lq three-ligand' case. These measures will also influence the stability of recombined hemin-protein entities, as apparent from the kinetics of heme-transfer from a modified donor protein to apomyoglobin, but the stability appears to be related to the bulkiness of 2,4-substitutional groups rather …

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Thermodynamic Studies Of Some Complexes Of 2-Benzoylpyridine 4-Phenyl-3-Thiosemicarbazone, T. Atalay, E. Güler Akgemci̇ Jan 1998

Thermodynamic Studies Of Some Complexes Of 2-Benzoylpyridine 4-Phenyl-3-Thiosemicarbazone, T. Atalay, E. Güler Akgemci̇

Turkish Journal of Chemistry

The stability constants of the Co(II), Ni(II), Cu(II) and Zn(II) complexes with 2-benzoylpyridine 4-phenyl-3-thiosemicarbazone were determined using a spectrophotometric method at different temperatures (25, 30, 35 and 40 $\pm$ 0.1^oC) and ionic strengths (0.05, 0.01 and 0.20 M KNO$_3$) in 50 \% (v/v) aqueous ethanol. Plots of thermodynamic stability constants at zero ionic strength ($\ln$ K^o) versus T$^{-1}$ gave linear curves and $\Delta$ H^o and $\Delta$ S^o were also calculated from these plots. Moreover, the changes in free energy for each metal-ligand system were calculated from the following equation. $\Delta$ G^o = -RT $\ln$ K^o.

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The Adsorption Isotherms Of The Bleaching Of Sun Ower-Seed Oil, Hüseyin Topallar Jan 1998

The Adsorption Isotherms Of The Bleaching Of Sun Ower-Seed Oil, Hüseyin Topallar

Turkish Journal of Chemistry

In this study, the absorbance measurements were taken for the bleaching of sunflower-seed oil with wt. 0.3, 0.5, 0.7 and 0.9 % of clay at 60, 70, 80 and 90°C. Bentonite EY-09 was used as the bleaching clay. Since the heat evolved during adsorption (0.33-1.07 kJ mol^{-1}) was less than 20 kJ mol^{-1}, the forces between the adsorbent and adsorbate appear to be van der Waals forces, and this type of adsorption is physical or van der Waals adsorption. Thus, it was seen that the Freundlich equation was more applicable than the Langmuir equation to the experimental adsorption isotherms for …

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Voltammetric Determination Of Salbutamol Based On Electrochemical Oxidation At Platinum And Glassy Carbon Electrodes, Niyazi Yilmaz, Sibel A. Özkan, Bengi Uslu, Zühre Şentürk, İnci Bi̇ryol Jan 1998

Voltammetric Determination Of Salbutamol Based On Electrochemical Oxidation At Platinum And Glassy Carbon Electrodes, Niyazi Yilmaz, Sibel A. Özkan, Bengi Uslu, Zühre Şentürk, İnci Bi̇ryol

Turkish Journal of Chemistry

The oxidative behavior of salbutamol was studied as a function of pH at platinum and activated glassy carbon electrodes. Between pH 1.9 and 12.0, the drug was characterized by a single oxidation step at both electrodes. The process was found to be dependent on the nature and the pH of the supporting elctrolyte. The procedure yielded a linear concentration range of $1 \times 10^{-4}$ to $1 \times 10^{-3}$ M and $2 \times 10^{-5}$ to $1 \times 10^{-3}$ M in 0.2 M sulphuric acid and a phosphate buffer of pH 6, at platinum and glassy carbon electrodes, respectively. The method was …

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Crossed N-Cubes And N-Crossed Complexes Of Commutative Algebras, Z. Arvasi̇, M. Koçak Jan 1998

Crossed N-Cubes And N-Crossed Complexes Of Commutative Algebras, Z. Arvasi̇, M. Koçak

Turkish Journal of Mathematics

In this paper we will define crossed $\Bbb N$-cubes and n-crossed complexes of commutative algebras and construct a functor from the category of simplicial algebras to that of n-crossed complexes.

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Dold-Kan Type Theorems For N-Types Of Simplicitial Commutative Algebras, Z. Arvasi̇, M. Koçak Jan 1998

Dold-Kan Type Theorems For N-Types Of Simplicitial Commutative Algebras, Z. Arvasi̇, M. Koçak

Turkish Journal of Mathematics

A functor from simplicial algebras to crossed \( n \)-cubes is shown to be an embedding on a reflexive subcategory of the category of simplicial algebras that contains representatives for all \( n \) types.

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Crystal Structure Of Dichlorodiaquabis-(P- Dimethylaminobenzaldehyde)Manganese(Ii), Veysel T. Yilmaz, Turan K. Yazicilar, Halis Ölmez, R. Alan Howie Jan 1998

Crystal Structure Of Dichlorodiaquabis-(P- Dimethylaminobenzaldehyde)Manganese(Ii), Veysel T. Yilmaz, Turan K. Yazicilar, Halis Ölmez, R. Alan Howie

Turkish Journal of Chemistry

The crystal structure of dichlorodiaquabis-($p$-dimethylaminobenzaldehyde)manganese(II), [MnCl$_2$(OH$_2$)$_2$(C$_9$H$_{11}$NO)$_2$], was determined from X-ray intensity data. The structure consists of the isolated molecules of the complex. The central Mn atom in the complex is coordinated by txo $p$-dimethylaminobenzaldehyde and two water molecules and also two chlorine atoms, resulting in a distorted octahedral environment. The same molecules or ions occupy {\it trans} positions. The crystal structure is stabilized by weak hydrogen bonds present between the isolated molecules.

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