This report includes a systematic review of the objectives and accomplishments of past ODP-IODP, industry, and nationally sponsored historical methane hydrate research drilling expeditions, and an analysis of both technical concerns that are related to the universal occurrence of methane hydrates and specific regional concerns that are unique to a given region or hydrate accumulation. It also reviews our present understanding of the geologic controls on the occurrence of methane hydrate in nature and how these factors may impact the energy, hazard, and climate change aspects of methane hydrate research, and summarizes some of the more important drilling related operational understandings and technology developments, such as pressure coring, downhole logging, and borehole instrumentation, which have contributed to our growing understanding of methane hydrates. This report concludes with a systematic review of planning documents for major methane hydrate research projects, national/international ...
The stability of submarine gas hydrates is largely dictated by pressure and temperature, gas composition, and pore water salinity. However, the physical properties and surface chemistry of deep marine sediments may also affect the thermodynamic state, growth kinetics, spatial distributions, and growth forms of clathrates. Our conceptual model presumes that gas hydrate behaves in a way analogous to ice in a freezing soil. Hydrate growth is inhibited within fine-grained sediments by a combination of reduced pore water activity in the vicinity of hydrophilic mineral surfaces, and the excess internal energy of small crystals confined in pores. The excess energy can be thought of as a capillary pressure in the hydrate crystal, related to the pore size distribution and the state of stress in the sediment framework. The base of gas hydrate stability in a sequence of fine sediments is predicted by our model to occur at a lower temperature (nearer...
the statistical thermodynamics model with some modifications describing host lattice relaxation, guest-guest interactions and the quantum nature of guest behavior in clathrate hydrates was applied to calculate the relative thermal expansion, i.e. ratio of volume at temperature T and pressure P0 to volume at T0, P0, of hydrogen clathrate hydrate as well as for ices. As reference points the temperature and pressure were selected as T0 = 140 K and P0 = 0.1 MPa, respectively. It was shown that hydrate phases immersed in the ice phases are stable below the three-phase ice-hydrate-gas equilibrium pressure. The hydrate phase remains thermodynamically stable under heating. The calculations show that the pressure in the hydrogen clathrate hydrate sphere immersed into the ice matrix is notably higher than the pressure inside the ice phase, but it does not lead to system distortion because of the formation of a network of hydrogen bonds between hydrate and ice phases. This is because the thermal expansion ...
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Hydrate Formation Temp In Dry Natural Gas - posted in Industrial Professionals: Hello. Just want to confirm if HYSYS properly estimates the hydrate formation of dry natural gas. In my simulation, the hydrate formation temp of the dry feed gas is at 22.81degC. I tried saturating the gas with water, however the hydrate formation temp still remained at 22.81degC. To fully assess this, I tried to add water bit by bit (until saturation) and observed the trend of the hydrate temp. I noticed that...
Sprague Dawley rats (21-29 d of age) of either gender were anesthetized with chloral hydrate and decapitated in accordance with Institutional Animal Care and Use Committee and National Institutes of Health guidelines. The olfactory bulbs were removed and immersed in sucrose-artificial CSF (sucrose-aCSF) equilibrated with 95% O2-5% CO2, pH 7.38. The sucrose-aCSF had the following composition (in mm): 26 NaHCO3, 1 NaH2PO4, 2 KCl, 5 MgSO4, 0.5 CaCl2, 10 glucose, and 248 sucrose. Horizontal slices (400 μm thick) were cut with a microslicer (Ted Pella, Redding, CA). After a period of recovery at 30°C for 15 min, slices were then incubated at room temperature (22°C) in aCSF equilibrated with 95% O2-5% CO2 [composition (in mm): 124 NaCl, 26 NaHCO3, 3 KCl, 1.25 NaH2PO4, 2 MgSO4, 2 CaCl2, and 10 glucose] until they were used. For recording, a single slice was placed in a recording chamber and continuously perfused at the rate of 1.5 ml/min with normal aCSF equilibrated with 95% O2-5% CO2. All ...
Dichloralphenazone is a sedative composed of chloral hydrate and phenazone. It is typically found in combination products Nodolor and Midrin containing isometheptene and acetaminophen used for the relief of tension and vascular headaches. It is a US Schedule IV drug and its clinical use is limited.
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TY - JOUR. T1 - A molecular dynamics study of guest-host hydrogen bonding in alcohol clathrate hydrates. AU - Hiratsuka, Masaki. AU - Ohmura, Ryo. AU - Sum, Amadeu K.. AU - Alavi, Saman. AU - Yasuoka, Kenji. PY - 2015/5/21. Y1 - 2015/5/21. N2 - Clathrate hydrates are typically stabilized by suitably sized hydrophobic guest molecules. However, it has been experimentally reported that isomers of amyl-alcohol C5H11OH can be enclosed into the 51264 cages in structure II (sII) clathrate hydrates, even though the effective radii of the molecules are larger than the van der Waals radii of the cages. To reveal the mechanism of the anomalous enclathration of hydrophilic molecules, we performed ab initio and classical molecular dynamics simulations (MD) and analyzed the structure and dynamics of a guest-host hydrogen bond for sII 3-methyl-1-butanol and structure H (sH) 2-methyl-2-butanol clathrate hydrates. The simulations clearly showed the formation of guest-host hydrogen bonds and the incorporation of ...
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Fire and Ice: The Chemistry of Methane Hydrate - The chemistry of methane hydrate is discussed in this section. Learn about the chemistry of methane hydrate.
Weve found an example where methane produced at a mid-ocean ridge is locked up in stable, deep water gas hydrate, preventing it from possibly getting out of the seafloor, says lead author Joel Johnson, associate professor of geology at UNH and guest researcher at the Center for Arctic Gas Hydrate, Environment and Climate (CAGE) at UiT The Arctic University of Norway in Tromsø. Johnson notes that the findings, which pinpointed a source of abiotic methane ¬produced in seafloor crust, indicate gas hydrates throughout the Arctic may be supplied by a significant portion of abiotic gas ...
CAS NO:123333-66-4; Chemical name:Potassium tellurite (IV) hydrate ; physical and chemical property of 123333-66-4, Potassium tellurite (IV) hydrate is provided by ChemNet.com
Deep-water pockmarks are frequently accompanied by the occurrence of massive gas hydrates in shallow sediments. A decline in pore-water Cl− concentration and rise in δ18O value provide compelling evidence for the gas hydrate dissociation. Mega-pockmarks are widely scattered in the southwestern Xisha Uplift, northern South China Sea (SCS). Pore water collected from a gravity-core inside of a mega-pockmark exhibits a downward Cl− concentration decrease concomitant with an increase in δ18O value at the interval of 5.7-6.7 mbsf. Concentrations of Cl−, Na+, and K+ mainly cluster along the seawater freshening line without distinct Na+ enrichment and K+ depletion. Thus, we infer that the pore water anomalies of Cl− concentrations and δ18O values are attributed to gas hydrate dissociation instead of clay mineral dehydration. Moreover, the lower δ18O values of sulfate in the target core (C14) than those in the reference core (C9) may be associated with the equilibrium oxygen fractionation during
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TY - JOUR. T1 - Thermodynamic stability of hydrates for ethane, ethylene, and carbon dioxide. AU - Kvamme, Bjørn. AU - Tanaka, Hideki. PY - 1995/1/1. Y1 - 1995/1/1. N2 - An extension of the theory of van der Waals and Platteeuw was recently proposed by Tanaka and co-workers. In this work, we extend these studies to apolar spherical models of ethylene, ethane, and carbon dioxide at different temperatures in the region of experimental equilibrium between ice and hydrate. For the larger components (CO2 and C2H6), dissociation pressures from the harmonic oscillator approximation is generally larger than corresponding results from the single-particle integration of the original theory of van der Waals and Platteeuw. Differences increase with increasing the ratio of guest size to the free cavity space. For the specific sets of model parameters applied here, the agreement between experiment and calculations is qualitative in the region of ice in equilibrium with hydrate. In the liquid water region ...
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함은 폐재의 리싸이클링을 위한 연구의 일환으로써 Hydrazine Hydrate을 환원제로 사용하여 질산은 수용액으로부터 Ag 나노분말을 제조하기 위한 실험을 수행하였다. 이를 위해 질산은을 소정 농도로 증류수에 용해시킨 수용액에 Ag 미립자의 응집방지를 위한 분산제로써 Tamol NN8906 혹은 Tween 20을 미리 혼합한 다음 환원제인 Hydrazine Hydrate 용액을 첨가하는 방법으로 환원반응을 실시하였다. 환원반응을 통하여 제조한 Ag 미립자는 입도분석기 및 TEM 측정을 통하여 형상과 평균입도를 측정하였다. Hydrazine Hydrate에 의한 은의 환원을 위해서는 이론치의 약 2배를 첨가해 주어야 하는 것으로 나타났으며, Tamol NN8906을 분산제로 사용하여 제조한 Ag 나노분발은 매우 좁은 입도범위의 분포특성을 보여 주었다. Tween 20을 분산제로 사용한 경우의 입도 분포는 bimodal 혹은 multimodal
Medical Doctor is just so poorly balanced though, I hope I proved that somewhat. Repeatedly knocking people out, using their own cuffs on them, looting them, then locking them away in a private chamber only he has access to unless someone can hack the door is fucking dumb. There are some saving graces like how scarce the meds he needs to make killer drugs are, but its pretty irrelevant. You can so easily just chloral someone and drag them into an airlock then cycle it while running out the door. Chloral them and then imprison them in your for-some-fucking-reason-even-the-captain-cant-get-in-here room. On most subs the medical lab doesnt get oxygen, which sounds bad but its actually great because you can just leave people locked inside it like an execution chamber. This job is fucking broken ...
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The CH4-CO2 replacement method has attracted global attention as a new promising method for methane hydrate exploitation. In the replacement process, the mechanical stabilities of CH4 and CO2 hydrate-bearing sediments have become problems requiring attention. In this paper, considering the hydrate characteristics and burial conditions of hydrate-bearing cores, sediments matrices were formed by a mixture of kaolin clay and quartz sand, and an experimental study was focused on the failure strength of CH4 and CO2 hydrate-bearing sediments under different conditions to verify the mechanical reliability of CH4-CO2 replacement in permafrost-associated natural gas deposits. A series of triaxial shear tests were conducted on the CH4 and CO2 hydrate-bearing sediments under temperatures of −20, −10, and −5 °C, confining pressures of 2.5, 3.75, 5, 7.5, and 10 MPa, and a strain rate of 1.0 mm/min. The results indicated that the failure strength of the CO2 hydrate-bearing sediments was higher than that of the
Description: Solid gas hydrates are a potentially huge resource of natural gas for the United States. The U.S. Geological Survey estimated that there are about 85 trillion cubic feet (TCF) of technically recoverable gas hydrates in northern Alaska. Gas hydrates are both a potential resource and a risk, representing a significant hazard to conventional oil and gas drilling and production operations. This report addresses the issue of cost and method of recovering potential gas hydrates, as well as the advantages and disadvantages of using gas hydrates as a potential energy source. Included is information on the Methane Hydrate Research and Development Act of 2000 and the Energy Policy Act of 2005. ...
TY - JOUR. T1 - Quantum chemical MP2 results on some hydrates of cytosine. T2 - Binding sites, energies and the first hydration shell. AU - Fogarasi, Géza. AU - Szalay, Péter G.. PY - 2015/1/1. Y1 - 2015/1/1. N2 - A detailed quantum chemical investigation was undertaken to obtain the structure and energetics of cytosine hydrates Cyt·nH2O, with n = 1 to 7. The MP2(fc)/aug-cc-pVDZ level was used as the standard, with some DFT (B3LYP) and coupled cluster calculations, as well as calculations with the aug-cc-pVTZ basis set added for comparison. In a systematic search for microhydrated forms of cytosine, we have found that several structures have not yet been reported in the literature. The energies of different isomers, as well as binding energies are compared. When predicting the stability of a complex, we suggest using a scheme where the water molecules are extracted from a finite model of bulk water. Finally, based on energetic data, we suggest a rational definition of the first hydration ...
TY - JOUR. T1 - Phase equilibrium condition measurements in carbon dioxide hydrate forming system coexisting with seawater. AU - Nakane, Rihito. AU - Shimosato, Yusuke. AU - Gima, Eito. AU - Ohmura, Ryo. AU - Senaha, Izuru. AU - Yasuda, Keita. PY - 2021/1. Y1 - 2021/1. N2 - Three phase equilibrium conditions of synthetic standard (seawater + carbon dioxide hydrate + carbon dioxide gas) were experimentally determined based on the batch, isochoric procedure. The total mass fraction of the electrolytes in the synthetic standard seawater, wss, was 0.0351, 0.0700, or 0.1036 that was composed of pure water and seven salts. The equilibrium pressure-temperature conditions were as follows: 271.95 K , T , 279.05 K and 1.298 MPa , p , 3.144 MPa in the system having wss = 0.0351, 272.25 K , T , 278.15 K and 1.530 MPa , p , 3.361 MPa in the wss = 0.0700 system and 271.15 K , T , 275.65 K and 1.643 MPa , p , 2.909 MPa in the wss = 0.1036 system. The quantitative evaluation of the changes in the equilibrium ...
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Cocrystal monohydrate of nitrofurantoin (NF) with melamine (MELA) has been studied as NF is an antibacterial drug used for the treatment of urinary tract infections. The structure of nitrofurantoin-melamine-monohydrate (NF-MELA-H2O) is characterized by FT-IR and FT-Raman spectroscopy. The energies and vibrational frequencies of the optimized structures calculated using quantum chemical calculations. Supported by normal coordinate analyses and potential energy distributions (PEDs), the complete vibrational assignments recommended for the observed fundamentals of cocrystal hydrate. With the aim of inclusion of all the H-bond interactions, dimer of NF-MELA-H2O has been studied as only two molecules of cocrystal hydrate are present in the unit cell. By the study of dimeric model consistent assignment of the FT-IR and FT-Raman spectrum obtained. H-bonds are of essential importance in an extensive range of molecular sciences. The vibrational analyses depict existence of H-bonding (O-H⋯N) between ...
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The federal government prohibits the manufacture, distribution, dispensation and possession of controlled substances unless specifically permitted by statute. The government categorizes controlled substances according to Schedules I through V. Schedule I drugs have a high potential for abuse, with no accepted medical use. Schedule I drugs include, but are not limited to, heroin, marijuana, hashish, LSD and other hallucinogens. Schedule II drugs have a high potential for abuse, but some medical use, and include opium, morphine, codeine, barbiturates, cocaine and its derivatives, amphetamines, phencyclidine (PCP) and other narcotics. Schedule III, Schedule IV and Schedule V drugs have some potential for abuse, but less than Schedule I and II drugs, with Schedule III drugs having the most potential for abuse and Schedule V the least. Schedule III, IV and V drugs include chloral hydrate (IV), certain barbiturates (III and IV), benzodiazines (IV), glutethimide (III), other depressants and narcotics ...
Also the fact that the doctor has prescribed a treatment at home suggests that it is a mild form of pneumonia! Chloral hydrate, acetylcarbromal, glutethimide, methyprylon, ethchlorvynol, and ethinamate also have a high liability for physical dependence and misuse and are also highly lethal in overdose? Alfentanil has the fastest onset of action of all the opioids? Deswegen wird die Behandlung üblicherweise nicht abrupt, sondern ausschleichend beendet? À la suite de comparaisons entre Madonna et elle-même, buspar for bipolar Gaga déclara « Je ne veux pas paraitre modeste, mais jai pour but de révolutionner la pop. This definition excludes milder cases of necrotizing enterocolitis with more subjective features? NOTE: The Reddit Cisco Ring, its associates, subreddits, and creator mechman991 are not endorsed, sponsored, or officially associated with Cisco Systems Inc? I have absolutely no knowledge of coding however I was hoping to start my own blog in the near future. Males had a median ...
TY - JOUR. T1 - Adsorption Mechanism of Inhibitor and Guest Molecules on the Surface of Gas Hydrates. AU - Yagasaki, Takuma. AU - Matsumoto, Masakazu. AU - Tanaka, Hideki. N1 - Publisher Copyright: © 2015 American Chemical Society. Copyright: Copyright 2015 Elsevier B.V., All rights reserved.. PY - 2015/9/23. Y1 - 2015/9/23. N2 - The adsorption of guest and kinetic inhibitor molecules on the surface of methane hydrate is investigated by using molecular dynamics simulations. We calculate the free energy profile for transferring a solute molecule from bulk water to the hydrate surface for various molecules. Spherical solutes with a diameter of ∼0.5 nm are significantly stabilized at the hydrate surface, whereas smaller and larger solutes exhibit lower adsorption affinity than the solutes of intermediate size. The range of the attractive force is subnanoscale, implying that this force has no effect on the macroscopic mass transfer of guest molecules in crystal growth processes of gas hydrates. ...
Although aldehyde dehydrogenase (ALDH) from sheep liver cytosol has a broad specificity, it will not oxidize the aldehyde group of glyoxylic acid which is in fact an inhibitor of the enzyme. The inhibition pattern is non-linear but competitive at high propionaldehyde concentrations (2-20 mM); however, a simple non-competitive pattern is observed at low (less than 100 microM) propionaldehyde concentrations (Ki = 1.6 mM). The esterase activity was unaffected by glyoxylic acid in the absence of NAD+ but a simple competitive inhibition pattern (Ki = 2.5 mM) was observed with respect to 4-nitrophenyl acetate in the presence of NAD+. The data require a two-site model in which ester and aldehyde binding sites are distinct but with a second propionaldehyde molecule, and glyoxylic acid, binding at or near the ester binding site. Consistent with this model is the fact that chloral hydrate was a non-competitive inhibitor of the esterase activity in the presence of NAD+ but a competitive inhibitor in its ...
Chlorobutanol (trichloro-2-methyl-2-propanol) is a preservative, sedative, hypnotic and weak local anesthetic similar in nature to chloral hydrate. It has antibacterial and antifungal properties. Chlorobutanol is typically used at a concentration of 0.5% where it lends long term stability to multi-ingredient formulations. However, it retains antimicrobial activity at 0.05% in water. Chlorobutanol has been used in anesthesia and euthanasia of invertebrates and fishes.[1][2] It is a white, volatile solid with a menthol-like odor. ...
Physicians and all groups who participate in helping sick people are aware that emotional patterns influence sense of well being and physical health. The success of the witchcraft doctor and the numerous healing cults is in large measure dependent upon the fact that patients achieve a sense of security from discussing their problems with a responsible and sympathetic person, whether he be a recognized physician or simply someone assuming that role. An extensive effort has been made to find therapeutic agents which will relieve emotional tension without impairing intellectual function. The earlier hypnotics, including paraldehyde, chloral hydrate and the bromides, ...
Tracer or toxin injections. For tracer experiments, under chloral hydrate anesthesia (7% in saline; 350 mg/kg), a fine glass pipette containing 1.0% cholera toxin subunit B (CTB; List Biologic, Campbell, CA), 12.5% biotinylated dextran (BD), or a mixture of 1% CTB and 12.5% BD was lowered to the precalculated targets based on the rat atlas of Paxinos and Watson (1998), and 9 nl of a solution containing the tracers was injected by an air pressure system. Phaseolus vulgaris leukoagglutinin (PHA-L; 2.5%) was injected by iontophoresis with a current of 5 μA for 15 min (7 s on and 7 s off). After two additional minutes, the pipette was slowly withdrawn and the incision was closed with wound clips. Animals survived for 7 d. The coordinates for tracer injections were as follows: medial prefrontal cortex, anteroposterior (AP), 2.20 mm, medial-lateral (ML), 0.4 mm, dorsoventral (DV), 4.6 mm; midline thalamus, AP, -2.8 mm, ML, 0 mm, DV, 4.4 mm; intralaminar thalamus, AP, -2.8 mm, ML, 0.8 mm, DV, 5.6 mm; ...
See also tic disorders, tic douloureux. See also aftereffect, contingent aftereffect, motion aftereffect, spiral aftereffect, tilt aftereffect, visual aftereffect. Pleuritic pain when applied locally into an apron of the vagina, and in 1959 by the gp is that it is important because of the. The only decision is made along the cutaneous lesions and mucosal lesions from cervical cancer who met the criteria are present, however. Of, relating to, or resembling] ehrensteins brightness illusion n. A speech style with insufficient detail, self-dramatization and theatricality, suggestibility, and a infarction normal ecg. There is no longer needed. Subjective expected utility, see also expected utility theory. Chloral hydrate, paraldehyde iii melatonin receptor agonist: Ramelteon iv orexin receptor antagonist: Anakinra is recombinant human b type natriuretic peptide secretion 1-6 fold. For allergic blepharitis, see later. After judging the degree of hypoprothrombinemia may be reduced. Table 24.5 ...
Gas-hydrate-bearing sand-core samples have been obtained from the Canadian Mallik wells, and the Nankai Trough wells of offshore Japan. The chloride-content anomalies in extracted pore waters, core-temperature depression, core observations, and visible gas hydrates, as well as continuous down-hole well-log data, confirm the presence of pore-space hydrateas an intergranular pore filling within sandy layers, clarifying the characteristics of subsurface natural gas hydrate in marine and permafrost zones. Gas-hydrate saturations (percent of pore volume) as high as 80% have been measured, which requires enough original pore space in the host sediment to allow the gas to accumulate. Carbon and hydrogen isotopic compositions of methane and hydrocarbon compositions in gas hydrate and gas-hydrate-bearing shallow sediments in the Nankai Trough show that methane is generated by microbial reduction of CO2 and suggest progressive decreases in microbial (biogenic) activity with depth and upward gas migration ...
Gas industry annually invests millions of dollars on corrosion inhibitors in order to minimize corrosion implications on flow assurance; however, attention has never been focused on possibilities of these chemicals to promote hydrate formation along deepwater pipelines, which would equally result in another flow assurance problem of high magnitude. This study investigated the possibilities of corrosion inhibitors to aid the formation of gas hydrate along offshore (or underwater) pipeline systems; developed a predictive model on corrosion rate for natural gas pipelines with gas hydrates as the corroding agent and finally investigated the ability of pure N2 and H2 gases to inhibit the formation of gas hydrates.All experiments in this thesis were conducted by forming various water-gas systems in a cylindrical cryogenic sapphire cell. The first investigative work on hydrate-corrosion relationship was conducted by allowing contacts between an industrial grade natural gas (with 20% CO2 content) and ...
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Mono- and Stereopictres of 5.0 Angstrom coordination sphere of Copper atom in PDB 2ein: Zinc Ion Binding Structure of Bovine Heart Cytochrome C Oxidase in the Fully Oxidized State
Interaction between salts (NaCl, CsCl) and calcium silicate hydrates (C-S-H). Application of (super 29)Si homonuclear and (super 1)H-(super 29)Si heteronuclear NMR correlation to structural studies of calcium silicate hydrates
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The cadmium sulfate hydrate study is divided into four related, but distinct areas The thermal decomposition of CdSO4.83H2O studied by thermogravimetric analysis A quantitative analysis technique for mixtures of CdSO4 hydrates A technique was developed which was based on using thermogravimetric and differential thermal analysis The devising of another quantitative analysis method for cases in which the above method was not applicable using x-ray diffraction analysis and Various controlled conditions were established in which composition changes were observed and analyzed. Author
Global and Chinese Disodium Phosphate 2 hydrate Industry, 2016 Market Research Report The Global and Chinese Disodium Phosphate 2 hydrate Industry, 2011-2021 Market Research Report - Market research report and industry analysis - 10128246
[150 Pages Report] Check for Discount on Global and Chinese Zinc Citrate 3 hydrate Industry, 2016 Market Research Report report by Prof Research. The Global and Chinese Zinc Citrate 3 hydrate Industry, 2011-...
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There are two forms of methane that we have to be concerned with. The first, methane as a pure gas, can burn or explode under the right conditions. The second form we need to concern ourselves with is methane hydrate. This is formed under water at a depth and temperature that makes it combine with the water it encounters as it bubbles out of the sea floor. Most of the methane that was, and still is, being released in the B P Macondo disaster never reaches the surface. It combines with the sea water to form methane ice which is another name for methane hydrate. As long as the methane hydrate remains at a deep enough depth and a low enough temperature it will remain somewhat stable and pose no threat. The danger from methane hydrate is if it is disturbed by some underwater event, such as an earthquake, and fizzes somewhat like the CO2 in a soda fizzes when you shake the can. Another way it can be released is if the temperature of the water at the bottom of the sea raises enough to let the ...
Thats pretty much the message of new study in Geophysical Research Letters. Large deposits of methane hydrates, i.e. methane ice, occur naturally in the
Temperature affects the properties of concrete through its effect on the hydration of cement and its associated microstructural development. This paper focuses on the modifications to C-S-H induced by isothermal curing between 5 and 60 degrees C. The results show that as the temperature increases (within the range studied) the C/S ratio of C-S-H changes only slightly, with a higher degree of polymerisation of silicate chains, but there is a significant decrease in its bound water content and an increase of apparent density of 25%. This increase seems to come from a different packing of C-S-H at the nanoscale. As a consequence of these changes, the microstructure of the cement paste is much coarser and porous, which explains the lower final strengths obtained by curing at elevated temperatures. (C) 2013 Elsevier Ltd. All rights reserved.. Keywords: Calcium silicate hydrate (C-S-H) (B) ; Temperature (A) ; Microstructure (B) ; SEM (B) ; BSE. ...
The Laboratory of Advanced Materials, belonging to the University of Alicantes department of Inorganic Chemistry, has developed a technology that allows the preparation of artificial methane hydrates.
Zeolite, used to remove Cs from a contaminated water, would be solidified for the safety disposal. Recently, geopolymer is considered as a new binder
0066] Specific examples of the compound (I) of the present invention include: [0067] 7-[(3S,4S)-3-amino-4-ethylpyrrolidin-1-yl]-6-fluoro-1-[(1R,2S)-2-(S)-fluo- rocyclopropyl]-1,4-dihydro-8-methoxy-4-oxoquinoline-3-carboxylic acid, a salt, or a hydrate thereof (Compound No. 1); [0068] 7-[(3S,4S)-3-amino-4-ethylpyrrolidin-1-yl]-6-fluoro-1-[(1R,2S)-2-fluorocy- clopropyl]-1,4-dihydro-8-methyl-4-oxoquinoline-3-carboxylic acid, a salt, or a hydrate thereof (Compound No. 2); [0069] (3S)-10-[(3S,4S)-3-amino-4-ethylpyrrolidin-1-yl]-9-fluoro-2,3-dihydro-3-m- ethyl-7-oxo-7H-pyrido[1,2,3-de][1,4]benzoxazine-6-carboxylic acid, a salt, or a hydrate thereof (Compound No. 3); [0070] 7-[(3S,4S)-3-amino-4-propylpyrrolidin-1-yl]-6-fluoro-1-[(1R,2S)-2-fluoroc- yclopropyl]-8-methoxy-1,4-dihydro-4-oxoquinoline-3-carboxylic acid, a salt, or a hydrate thereof (Compound No. 4); [0071] 7-[(3S,4S)-3-amino-4-propylpyrrolidin-1-yl]-6-fluoro-1-[(1R,2S)-2-fluoroc- yclopropyl]-8-methyl-1,4-dihydro-4-oxoquinoline-3-carboxylic ...
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Methanol incorporation in clathrate hydrates and the implications for oil and gas pipeline flow assurance and icy planetary bodies
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