Chemistry Commons^™

A Speleogenetic History Of Novoafonskaya Cave In The Western Caucasus, Olga Chervyatsova, Sergey Potapov, Jonathan Baker, Dmitry Gavryushkin, Victor Polyak, Matt Heizler, Sergey Tokarev, Sergey Sadykov, Roman Dbar, Yuri Dublyansky

International Journal of Speleology

Speleogenesis in hypogene karst settings may be closely tied to regional tectonic dynamics and concomitant hydrochemical evolution of karst waters. However, placing temporal constraints on these processes can require a wider array of field observations and techniques than for typical karst systems. Herein, we present a comprehensive study of Novoafonskaya Cave (Western Caucasus, Abkhazia). The updated speleogenetic history of the cave comprises four stages: (1) the most ancient, a low-T hydrothermal (ca. 40–50°C) priming stage; (2) the main stage enabled by mixing of upwelling thermomineral and locally recharged common karst waters; (3) the late sulfuric-acid speleogenesis (SAS) stage, which left …

A Typological And Chemical Analysis Of Roman Oil Lamps From Poggio Del Molino, Brandon Tejo

Dissertations, Theses, and Capstone Projects

Terracotta lamps, known to the Romans as lucernae, are small, handheld, often decorated objects which provided ancient people light. To modern researchers, they serve as tools for dating stratigraphy and iconographic studies. Beyond their immediately apparent aesthetic and symbolic value, the chemical compositions of the clay of these lamps reflect their origin. This study complements archaeological typologies with chemometric analyses to describe 16 Late Republican and Imperial Roman lamps recovered from the villa at Poggio del Molino (PdM), Tuscany. These finds were recovered from the 2021 and 2022 PdM excavations. The combined approach of typology with X-ray Diffraction (XRD) …

The Impact Of Glacial Proximity On The Elemental Composition Of Leachate Derived From Sediment Weathering, Karoline Ford

Theses/Capstones/Creative Projects

This study assesses chemical weathering trends as they relate to glacial retreat. The chemical environment of surfaces exposed to the atmosphere differs significantly from beneath a glacier. As a glacier melts, changes to the biogeochemical processes generate environmental gradients. This study analyzed chemical weathering signals at different distances from a glacial front by comparing the elemental composition of leachate derived from sediments in southeastern Greenland. Samples from proglacial, nonglacial, and moraine locations were weathered in a laboratory setting, and ion chromatography was used to determine the elemental composition of the products. Divergent trends in leachate composition were observed as distance …

Vanadium Partitioning Between Magnetite, Hematite, And A Hydrothermal Fluid: Implications For Iocg And Ioa Deposits, Jeremy Raymond Nederbo

Graduate Research Theses & Dissertations

Iron oxide-copper-gold (IOCG) and iron oxide-apatite (IOA) deposits are major sources of iron contained within magnetite and/or hematite as well as copper contained within copper-iron sulfides and gold as a native metal. Their formations have been attributed to magmatic, hydrothermal, or a mixture of magmatic-hydrothermal processes. Vanadium can readily substitute into magnetite via ion exchange due to similar atomic radii and charges as iron and has thus been hypothesized to be an effective tracer of hydrothermal or magmatic inputs. To evaluate the mobility of vanadium in a magnetite-hematite-fluid system, experiments on the partitioning of vanadium between magnetite, hematite and a …

Cosemiprime Ring, Muntaha Abdul- Razaq Hasan

Al-Qadisiyah Journal of Pure Science

In this paper ,we introduce a new type of rings,namely cosemiprime ringas a generalization of semiprime ring,where a ring C is said to be cosemiprime ring if I= for each ideal I of C .Some properties of this type of rings are obtained . Also,we determin the relationship among types of ideals in this ring.

Review Of Key Derivation Functions In Cryptographic Systems, Hasan Kadhim A. Alsuwaiedi, Abdul Monem S. Rahma

Al-Qadisiyah Journal of Pure Science

Because of its significance in the formation of the core of encryption/decryption algorithms, the key derivation function (KDF) or pseudorandom number generator (PRNG) plays a major part in the cryptographic system. Random numbers are required for the usage of encryption and decryption techniques in a variety of network security applications. In this research we Focus on key generation functions, which are an important aspect of symmetric and asymmetric algorithms. Disgusting the background of PRNG basics and attempting to characterize and evaluate several publications that offer proposals for key generators.

The Refractive Index Of Photonic Crystal Fibers As A Function Of Some Parameters And Temperature, Mohammed Salim Jasim, Nadia Al-Aboody

Al-Qadisiyah Journal of Pure Science

Photonic crystal fibers in the late period occupied a wide range of studies and research because of the ease of dealing with them in terms of design and installation, as there is a group of parameters used in them that can affect the refractive index of the pulse propagation through it, including the diameter of the air holes, the distance between the air holes and their number, as this study showed in addition to the aforementioned parameters The effect of temperature on the refractive index was also studied. It has been observed that with an increase in the diameter of …

Common Fixed Point Theorems By Using Two Mappings In B-Rectangular Metric Space, Qasim K. Kadhim

Al-Qadisiyah Journal of Pure Science

In this paper, the aim to obtain the existence and uniqueness of some common fixed point theorem on b-rectangular metric space by using new conditions including rational, maximum, minimum and combination for two mappings.

Environmental And Diagnostic Study Of Some Parasites In River Diwaniyah-Fish Of Al Xanthopterus, Abtisam Jasim Abbas

Al-Qadisiyah Journal of Pure Science

The current study was concerned with investigating parasitic infections in Barbus Xanthopterus fish in Al-Diwaniyah River, for the period (July 2020-December 2020). (218) fish were collected from three different locations along the Al-Diwaniyah River. The results of the laboratory examination indicated that the fish were infected with the parasite Chilodonella Cyprinid and Eimiria sinenis. The current study recorded changes in the physical and chemical properties of Al-Diwaniyah River water, as the water temperature values, measured turbidity values, pH, electrical conductivity, hardness and TDS recorded a clear variation during the months of the study. The results of the statistical analysis indicated …

Some Properties Of Almost Periodic Points In A Random Dynamical System, Qays Arif Wali, Ihsan Jabbar

Al-Qadisiyah Journal of Pure Science

No abstract provided.

Preparation And Study Of Tin And Gallium Thin Films On Silicon Substrates, Maher Nadher Abdullah

Al-Qadisiyah Journal of Pure Science

In this research, the ideal procedures were obtained for growth epitaxial layers of tin and gallium solutions which are solid solutions, and the two solutions of the molten material were dissolved on a silicon substrate. The results were to obtain the lowest dislocation density of thin films. The relationship between the dislocation densities of thin films and the thickness of the thin film was an exponential relationship between its variable values. Thin films with a compound containing a smooth structure varied in order were obtained by smoothly changing the lattice parameters of the gradient gap solid solution, and an ideal …

Correlation And Comparison Of Some Trace Elements And Their Related Proteins In Type 2 Diabetes Mellitus In Kalars City/ Kurdistan-Iraq, Hero Helal Muhammed Saed, Zeyan Abdullah Ali

Al-Qadisiyah Journal of Pure Science

No abstract provided.

Antibiotic Susceptibility Of Proteus Mirabillis That Isolates Of Diabetic Foot Ulcers In Al- Diwaniyah Hospital, Aseel Hussein Jaber, Suaad A. Fazaa Almiyah

Al-Qadisiyah Journal of Pure Science

The current study have been included 250 samples diabetic foot ulcer patients attending in Al-Diwaniyah Teaching Hospital and private clinics at a period of study from beginning October 2021 to February 2022, Isolates were identified by morphological form on blood agar and macConkey agar, traditional biochemical tests and then confirmed by Vitek 2 system. The result of bacterial culture have been recorded that only 80 samples had positive result to P. mirabilis formed (32%) of this result. Prevalence of P. mirabilis isolates in male more than female (34.78%) and (28.57%) respectively, after then were determination of antibiotics susceptibility pattern of …

Supra-Approximation Spaces Using Combined Edges Systems, Hussein R. Jaffer, Khalid Sh. Al’Dzhabri

Al-Qadisiyah Journal of Pure Science

The primary in this paper's notion, the i-space using incident edges system (resp. n-space using non-incidental edges system), is what this study is responsible for generating and investigating. Additionally, we used c-interior to define the c-lower approximations in generalized rough set theory (resp. i-interior and n-interior) Additionally, the c-upper approximations are defined using c-closure (as opposed to i-closure and n-closure), and some of its characteristics are studied.

Study Of Transitive Random Dynamical Systems, Salam T. Abbas, Ihsan J. Kadhim

Al-Qadisiyah Journal of Pure Science

No abstract provided.

Candida Spp. Associated With Covid-19 And Its Susceptibility To Some Antifungals, Mohammed Mudhafar Alkhuzaie, Neeran Obied Jasim

Al-Qadisiyah Journal of Pure Science

The aim of this study was to conduct a survey of the Candida species associated with COVID-19 viral infection in 150 patients who were admitted to the intensive care unit (ICU) in Al-Diwaniyah Teaching Hospital in Al-Diwaniyah City, Iraq, for a five-month period from October 2021 to February 2022. The results indicated the dominance of Candida spp. over the rest of the isolated fungal species, with 97 isolates (64.66%). C. albicans was shown to be the most abundant species with a percentage of 55.67 percent (P 0.05), compared to the other Candida species that were isolated (Candida tropicalis 13.4 percent, …

Fungal And Trichothecenes (Tct) Contamination Of Poultry Feed From Duhok Province, Kurdistan Of Iraq, L. F. Hussei A. A. M. Saadullah

Al-Qadisiyah Journal of Pure Science

Fungi are capable of reducing the nutritional value of food for human and animals and producing many mycotoxins. Mycotoxins-contaminated animal feed has adverse effects on productivity and animal health. As well, mycotoxins may be carried over into meat and eggs when poultry are fed with contaminated feed. Data on the occurrence of T-2 and HT-2 toxins in poultry feed from Kurdistan region of Iraq are very limited. T-2 toxin is the most toxic type A trichothecene mycotoxin. It is the secondary metabolite of the Fusarium fungi, and is common in grains and animal feed. Toxic effects have been shown both …

Omitted - Value Transformation For A Complex Differential Equations, Shatha S. Alhily, Fatima Ah. Mazloum

Al-Qadisiyah Journal of Pure Science

No abstract provided.

Comparative Physiology Study Of Side Effect Between Xenical And Lipo-6 Supplements Which Treated Obese Rabbets, Hayder Ghazib Abdulshaheed

Al-Qadisiyah Journal of Pure Science

Obesity is rapidly becoming a health problem, and it is considered a metabolic disease of epidemic proportions. Obesity is also associated with many comorbidities such as hyperlipidemia, fatty liver, atherosclerosis, cancer. Use of over-the-counter weight-loss supplements has become more common in the world; Xenical and Lipo-6 are two examples of nutritional supplements that do not pass safety research before being sold to the consumer. The ability of Xenical and lipo-6 supplements on DNA fragmentation in human lymphocytes was studied, where these cells represent important defense line of the body. On other hand, thirty white rabbits Iraqis in this experiment, weighing …

Steganography Using Syntactic Method, Saad Nasser Al.Azzam, Fahad Ali Al-Qarni

Al-Qadisiyah Journal of Pure Science

Information security, which is becoming more crucial as information sharing plays an increasingly significant part in the day-to-day activities of today's people, is one of the methods that may be used for information security. For the sake of information security, we present a method to linguistic steganography that is based on syntactic banks.

While the unprocessed input a phrase structure of the sentence is produced by parsing the sentence using the Stanford parser, which can create a phrase structure of the sentence.

They create the grammatical structure of the sentence. The input secret message is encoded using Shannon-Fano coding in …

Water Quality Evaluation Of The Main Drain In Dhi-Qar Governorate, South Iraq, Ali H. Nomas, Ayser Al-Shamma

Al-Qadisiyah Journal of Pure Science

The Main Drain is one of the largest irrigation projects which is used to collect drainage water from the lands extended on both sides of the water channel and diverts it to Shatt Al-Arab and from there to the Arabian Gulf. The Main Drain passed in Dhi-Qar Governorate to the northeast of Nasiriyah oil field in the Kati’a area, which is about 38 km from the center of the city of Nasiriyah. The objective of the present research is to evaluate the water quality, and its temporal change of the Main Drain, and if there is an impact of the …

Application Of A 14c-Assay To Assess Methanotrophic Biodegradation Of Tce In Low Ph Groundwater, Evan Groome

All Theses

Current biological strategies for remediating trichloroethylene (TCE) in low pH aquifers (i.e., pH14C-TCE assay was developed to determine pseudo first-order rate constants for the degradation of TCE in microcosms containing soil and groundwater from the Boeing Michigan Aeronautical Research Center (BOMARC) superfund site, where the pH ranges from 4.1 to 4.9. The ¹⁴C-TCE assay was also adapted to calculate soil-normalized rate constants for data from this site, as well as data that Szwast²¹ collected from the Beltsville Agricultural Research Center (BARC). In addition to natural attenuation, biostimulation through amendments of methane and nutrients were also assessed. This treatment …

Geologic Controls On 137cs Cycling By Terrestrial Vegetation In The Eastern U.S., Kathleen Chellman

Undergraduate Honors Theses

¹³⁷Cs is a radioactive trace metal (T_1/2 = 30 y) that was dispersed globally by nuclear weapons testing in the 1950s-1960s. Prevailing winds and precipitation systems caused some areas far from the test sites to receive significant fallout, which is still easily measured in soils, sediments and even some vegetation in the Eastern United States. Recent work near Chernobyl and Fukushima indicates that trace levels of ¹³⁷Cs can harm insects, pollination services, and other ecological functions. In areas with low soil potassium, ¹³⁷Cs is cycled in vegetation; however, soil potassium alone doesn't consistently predict the ^{137 …}

Arsenic In Groundwater Sources From Selected Communities Surrounding Taal Volcano, Philippines: An Exploratory Study, Geminn Louis C. Apostol, Sary Valenzuela, Xerxes Seposo

Ateneo School of Medicine and Public Health Publications

Arsenic (As) is a highly toxic, carcinogenic trace metal that can potentially contaminate groundwater sources in volcanic regions. This study provides the first comparative documentation of As concentrations in groundwater in a volcano-sedimentary region in the Philippines. Matched, repeated As measurements and physico-chemical analyses were performed in 26 individual wells from 11 municipalities and city in Batangas province from July 2020 to November 2021. Using the electrothermal atomic absorption spectrometric method, analysis of the wells revealed that in 2020, 23 out of 26 (88.46%) had As levels above the WHO limit of >10 ppb while 20 out of 26 wells …

Synthesis And Characterization Of New Benzimidazole-Nitrone Derivatives And Study Of Their Effect As Anti-Fungal, Meaad A. Fadel, Dawood S. Ali, Hanaa K. Mousa

Al-Qadisiyah Journal of Pure Science

New benzimidazole derivatives (benzimidazole-nitrone) were synthesized from the condensation of o-phenylene diamine with p-amino benzaldehyde in the presence of (P-TSOH\EtOH) then the benzimidazole compounds that containing an imine group were oxidized to obtain a nitrone group by used peracetic acid and identified by FT-IR, H1-NMR spectra, and elemental analysis. all compounds applied to the candida and aspergillus fungi gave a different result. The compounds have Ph, OH and N(CH3)2 groups as substituted in synthesized benzimidazole derivatives were showed reactivity as anti-fungal.

Pascoite Minerals And Potential Application Of Nmr Spectroscopy, Craig C. Mclauchlan, Beth Trent-Ringer, Debbie C. Crans

Faculty Publications – Chemistry

The 20 minerals encompassing the pascoite family of decavanadate isopolyanion-containing [V₁₀O₂₈]⁶⁻ minerals include a few minerals, such as rakovanite, that have been described as containing a protonated decavanadate anion. Rakovanite was originally assigned the formula Na₃[H₃V₁₀O₂₈]•15H₂O and now is redefined with an ideal formula (NH₄)₃Na₃[V₁₀O₂₈]•12H₂O. Nuclear magnetic resonance (NMR) and particularly ⁵¹V NMR spectroscopy is an informative method used to describe the protonation state and speciation in both solid and solution states …

In Situ Study Of Geological Fluid Inclusions Using 23na Nuclear Magnetic Resonance Spectroscopy, Stephen Pilar

Electronic Thesis and Dissertation Repository

²³Na Magic Angle Spinning Solid State Nuclear Magnetic Resonance (MAS SS NMR) spectroscopy has been used to study natural geological samples of halite, fluorite, and quartz to evaluate the efficacy of NMR spectroscopy for in situ fluid inclusion analysis. NaCl calibration standards yielded a strong linear correlation (R²=0.9919) for salinity, albeit only over a ~1 ppm breadth of chemical shift. Fluid inclusions were successfully identified in all three types of minerals studied using MAS NMR. Chemical analysis with Inductively Coupled Plasma -- Mass Spectrometry (ICP-MS) was employed to quantify elemental contaminants in halite samples. Powder X-Ray Diffraction …

Influence Of Physical Variability Of Highly Weathered Sedimentary Rock On Nitrate In Area 3 Of The Enigma Field Research Site At Y-12, Erin Kelly

Masters Theses

Uranium processing and waste storage in unlined waste ponds leached contaminants into the groundwater at Y-12, Oak Ridge, Tennessee, from the 1950s to 1980s. Groundwater wells near the S-3 ponds have had the highest nitrate concentrations of groundwater anywhere in the world (>10,000 mg/L). For reference, the maximum contaminant level for nitrate in drinking water set by the U.S. Environmental Protection Agency is 10 mg/L. Since 2012, the ENIGMA (Ecosystems and Networks Integrated with Genes and Molecular Assemblies) group has been characterizing, monitoring, and conducting field experiments to understand the interactions between contaminants, microbes, and the subsurface. The goals …

Effects Of Nitrate On Arsenic Mobilization During Aquifer Storage And Recovery, Hania Hawasli

USF Tampa Graduate Theses and Dissertations

Aquifer storage and recovery technology is used to sustain water resources and to prevent saltwater intrusion. The injected water can come from various resources, including treated wastewater. In pilot ASR studies in the Tampa Bay region, researchers found high As concentrations in the recovered water from the oxidation of the arsenopyrite that is embedded in the aquifers. The presence of dissolved O2 in the injected water is a major factor in the arsenopyrite oxidation during ASR, however the effects of NO3- on the arsenopyrite has not been studied yet. This is an important knowledge gap because injected water may contain …

Petrology And Geochemistry Of Evolved Achondrites: Planetesimal Mantles And Crusts, Zoltan Vaci

Earth and Planetary Sciences ETDs

Melting and differentiation are fundamental to early solar system evolution on planetary bodies that accreted enough material to heat up radioactively or through impacts and breach their solidi. Partially and fully melted material is present in the meteorite record in the form of primitive achondrites and achondrites, which are fragments of planetesimals that underwent heating events in the first few million years of solar system history. Although the vast majority of this material is mafic or ultramafic, new evolved samples, recovered in the last few decades, are pushing the petrologic and geochemical boundaries of planetesimal melting, differentiation, and crust formation. …