methane hydrates in the black sea

... conditions Indeed, in addition to them being exceptional gas storage hosts there is an overwhelming abundance of methane contained in methane hydrates around the world Thus, methane hydrates would be the ... Additionally, the bottom of the hydrate-bearing layer coincides with the bottom of the region in which hydrates remain stable in, requiring only minute changes in temperature and pressure to induce ... active research in the oil and gas industry since the 1930s In this chapter, an introduction to the gas hydrates will be given as well as the motivation and scope of this work Finally, the organization...

Ngày tải lên: 01/10/2015, 17:26

... for the Black Sea level fl uctuation since the Last Glacial maximum Research interest in the Black Sea has been reignited again aft er Ryan et al (1997) published the hypothesis of an early Holocene ... the Black Sea basin are similar to those during interglacial periods, when the level of this basin was high enough to allow sea water penetration from the Mediterranean Sea through the Bosphorus ... that the Black Sea was connected with the Global Ocean all this time demonstrating that these regressions were real, would throw all we know about the Holocene sea level in the ocean into a state...

Ngày tải lên: 13/01/2020, 19:55

... Turkey-Greece-Italy Interconnector (ITGI), and to sign memoranda of understanding with Iraq and Egypt, respectively, regarding their inclusion in the projected Southern Corridor The defining step came in July ... liquids for the Caspian Sea area” (Watkins, 2011: 72) 14 Blue Stream is a gas pipeline linking Russia to Turkey under the Black Sea It was commissioned in 2003 The offshore section, running from ... uncertainty, if and when looked atfrom the vantage point of the CEE We want to argue that to bring this uncertainty to the fore various sets of constrainingfactors must be taken into account: (a) the...

Ngày tải lên: 12/10/2022, 10:12

... constitute the main basis for determining the suitability of the area and be directly related to the regulatory context in force for the aquatic activities in the study area During the planning process, ... geographic institutions), others Coastline The coastline is the land along the edge of a coast, forming a boundary between the land and the ocean, sea or lake The coastline shown on charts represents the ... on the basis of a dual analysis taking into consideration both the administrative and the environmental working lines The administrative working line is based on the parameters that might interfere...

Ngày tải lên: 15/05/2020, 10:10

... was located in the central basin of the Black Sea southeast of the peninsula Crimea at 2048 m water depth, the site of the previous study was located west of the peninsula Crimea on the slope at ... donors, and it is tempting to sup-pose that they are a dominant group within the community of sulfate reducers in the anoxic sediments from the Black Sea and the Peru margin Another unlike possibility ... belonging to this family were detected in samples from the Black Sea and Peru margin sediments indicating that bacteria of this community play an important role in sulfate reduction in these...

Ngày tải lên: 04/12/2022, 16:12

... would navigate the NSR in convoys The hazards involved inconvoying have been succinctly characterised: ‘Being at sea is risky; being at sea in ice is twice the risk; being at sea in ice in convoy ... setforth in publications issued by the Northern Sea Route Administration (NSRA),including the Guide to Navigating through the Northern Sea Route (NSRNavigation Guide) and the Requirements for the ... pollution of the marine environment The said rules shall be pub-lished in Notices to Mariners. Accordingly, in 1990 the Regulations for Navigation on the Seaways of the NorthernSea Route (NSR...

Ngày tải lên: 01/11/2013, 09:20

... [7,52,57]. Nevertheless, independently of the resulting effect of the thermal stress, all mechanisms point to the involve- ment of oxidative stress in the early stages of symbiosis breakdown. In fact, ... and the small subunit fit between the two domains. Residues boxed are the component of substrate binding site. Asterisks indicate the His and Cys residues of the putative active site located in the ... strengthens the involvement of a caspase-like activity, in animal tissue of A. viridis, avoiding interference by generic proteas- es. In the two animal cell layers, the effect of the two inhibitors...

Ngày tải lên: 30/03/2014, 10:20

... city, bordering the Saltivka housing... Residents of the development walked their dogs in the fields, trampling down seedlings and ruining crops In the face of rising conflict between ... Tsarina Catherine the Great during her travels at the end of the eighteenth century, post-Soviet Potemkin villages convinced Moscow and Kyiv of local state officials’ loyalty and international ... location on the road to the Soviet metropolis The group had gathered to demand land for garden plots The protesters had specific land in mind The land lay at the eastern edge of the city,...

Ngày tải lên: 04/06/2014, 17:42

... α-tubulin and β-tubulin. Since the genes we selected were well conserved among the eukaryotic line- age, we found little variation in the number of hits between the different species contained in ... retrieved 41 distinct scaffolds containing 28S rRNA sequences and 558 distinct scaffolds containing 16S rRNA from the SSD. Assuming an equal distribution of the number of rRNA repeats in the genomes ... scaffolds containing one of the two rRNA genes, and blastx against GenBank's protein database for the scaffolds contain- ing one of the eight 'anchor' protein genes. We deduced the taxonomic...

Ngày tải lên: 14/08/2014, 08:20

... How the valence electrons are distributed in the molecular orbitals follows from the Aufbau principle: they are placed, one after the other, in the MOs, in the order of increasing energy The ... On the other hand, one AO of the central atom could be a nonbonding MO, which is empty in the carbenium ion, contains an electron in the radical, and contains the nonbonding electron pair in the ... and 1, which, in turn, is due to the fact that the s character of the Cspn-element bond increases in the same order Other things being equal, the shorter the bond, the stronger the bond An immediate...

Ngày tải lên: 02/04/2014, 16:01

... nicotinamide ring of the bound ligand in the active site [14] In this view, it is significant that the perturbations induced by NADPO binding to FprA were more intense than those induced by the other ... alteration of the isoalloxazine microenvironment induced by the binding of the NMN group The small structural differences in the nicotinamide rings of NADP+, NADPO and thio-NADP+ resulted in small ... values of NADPO were determined by fitting the experimental data points to the theoretical equation for the competitive inhibition mechanism, using the nonlinear fitting feature of grafit (Erithacus...

Ngày tải lên: 16/03/2014, 11:20

... double bond inside of the cyclobutene ring The presence of a further double bond inside of the cyclohexene ring is not of relevance due to the inactivity of this double bond in the DARinv The anhydride ... reciprocally proportional to the ring’s size; the minimum is reached with the six-atom ring, and in larger rings the reaction rate is slightly increasing Derivatives of the cyclobutene dispose still ... effects on the diene A., which induce a decrease of the electron density of the tetrazine ring Whereas in contrast the R3 features a +I effect resulting in a relative high electron densitiy in the dienophile...

Ngày tải lên: 26/10/2012, 09:39

... tố tróc vảy (exfoliative toxin-ET): gồm hai loại ETA ETB gây triệu chứng da kết vảy nứt nẻ da -Độc tố phá màng: bao gồm α-toxin, β-toxin, δ-toxin, γ-toxin leucocidin Chúng có khả phá hủy màng ... vi sinh vật khác Q trình tăng sinh gồm hai giai đoạn: Giai đoạn tăng sinh giai đoạn tăng sinh chọn lọc mơi trường đặc trưng - Phân lập: q trình tách vi sinh vật mục tiêu khỏi quần thể vi sinh ... dẫn đến lỵ - Độc tố thần kinh: gọi Shigatoxin, độc tố mạnh thấy S dysenteriae 1, tương tự verotoxin E coli O157:H7, tác động đặc hiệu vào hệ thần kinh Ngồi ra, Shigatoxin coi tác nhân gây thương...

Ngày tải lên: 16/03/2013, 09:26

... duncid, glycerol; lên men inulin, pectin, adonite; không lên men dextrin, amidon, glycogen, inositol, cellobiose Vi khuẩn thường sinh indol, không sinh urea H2S, có sinh lysin decarboxylase, không ... sinh với nguồn cacbon glucose, galactose, lactose, maltose, arabinose, xylose, ramnose, mannitol, fructose; lên men hay không lên men saccharose, rafinose, esculin, duncid, glycerol; lên men inulin, ... thường sinh domoic, axit amin gây độc cho hệ thần kinh thể + Tảo lam: có nhiều loại, tạo nhiều loại độc tố khác nhau, đặc biệt chất có hiệu ứng gây độc cho hệ thần kinh Aphanizomenonf aquae sinh...

Ngày tải lên: 16/03/2013, 09:26

... tập tin viết tập tin thứ hai, định dạng nén khác o // ImageIO.c o // Example showing how to read and write images o #include "cv.h" o #include "highgui.h" o #include o int main(int ... Capture.c // Example showing how to connect to a webcam and capture // video frames #include "stdio.h" #include "string.h" #include "cv.h" #include "highgui.h" int main(int argc, char ** argv) ... ConvertToGray.c o // Example showing how to convert an image from color o // to grayscale o #include "stdio.h" o #include "string.h" o #include "cv.h" o #include "highgui.h" o int main(int argc, char** argv)...

Ngày tải lên: 26/04/2013, 14:55

... Halides What is the product? Carbocation formation is the rate-limiting step a more stable carbocation Carbocation Stabilities Alkyl groups decrease the concentration of positive charge in the carbocation ... Markovnikov’s Rule The electrophile adds to the sp2 carbon that is bonded to the greater number of hydrogens In a regioselective reaction, one constitutional isomer is the major or the only product ... rearrange … Carbocation Rearrangement Ring Expansion a more stable carbocation Addition of Halogens to Alkene Addition of Halogens in the Presence of Water Consider the transition states … Oxymercuration...

Ngày tải lên: 28/06/2013, 01:25

... Synthetic medium (described below) was continuously fed into the reactor In order to collect the enriched sludge adhering to the non-woven fabric carriers, the non-woven fabric was washed in ... No.2, 2011 using the indophenol method (Weatherburn, 1967) The nitrite and nitrate concentrations were determined by using ion chromatography (ICS-1500, Dionex, USA) The nitrogen loading rate and ... continuous water treatment test (Fig 1) The volume of the reactor was 500 mL, and 100 mL of the gel carrier cubes was placed inside the reactor (packing ratio, 20%) The reactors were operated in...

Ngày tải lên: 05/09/2013, 10:17