scholarly journals APPLICATION OF LAYER-BY-LAYER METHOD FOR IMMOBILIZATION OF ACARICIDE AGENTS ON CELLULOSIC TEXTILE MATERIALS

2018 ◽  
Vol 59 (7) ◽  
pp. 42
Author(s):  
Anna A. Prokhorova ◽  
Olga I. Odintsova ◽  
Ekaterina O. Avakova ◽  
Victoria А. Kuzmenko
Keyword(s):  
Mineral Exploration ◽  
Modern World ◽  
Layer By Layer ◽  
Natural Focus ◽  
Textile Materials ◽  
Chromatography Analysis ◽  
Rescue Workers ◽  
Irkutsk Region ◽  
Exploration Drilling ◽  
Gas Fields

The professional clothing with a repellent finish becomes necessary in the modern world. It is used for foresters, geologists, rescue workers, firefighters, military, personnel of mineral exploration, drilling and gas fields, etc. Clothing with a repellent finish as prophylactic in periods of tick-borne encephalitis epidemics becomes especially relevant. The purpose of the study was to develop a technology of textile materials permanent repellent finishing by means of oppositely charged poly electrolytes. The cotton and cotton- polyester textile materials with surface density from 123 to 350 g/m2, previously prepared for the repellent finishing, were served as a research object. The  polydiallyldimethylammonium chloride (PDADMAC) and Akremony were used as a polyelectrolytes. The influence of the polyelectrolytes application sequence on the kinetics of repellent release from textile materials was investigated by means of gas chromatography. Analysis of textile materials repellent finishing technical results showed that the percentage of alfatsipermetrin on fabric, processed according to the proposed technology, remained unchanged after five washings.  Thus, the resulting acaricidal effect is stable to wet treatments. The test of the costumes protective effect with inserts of processed fabric in respect ticks in the natural focus of tick-borne viral encephalitis in the Irkutsk region was carried out. On the basis of completed researches the possible technological schemes of textile materials acaricidal finishing was developed. The obtained results allow recommending the developed technology for imparting of acaricidal properties to textile materials.

Fault-seal potential of the Palaeozoic in the northwest Canning Basin

2012 ◽  
Vol 52 (1) ◽  
pp. 427
Author(s):  
Julian Strand ◽  
Antoine Vaslin ◽  
Laurent Langhi
Keyword(s):  
Injection Site ◽  
Western Australia ◽  
Co2 Sequestration ◽  
Hydrocarbon Exploration ◽  
Early Permian ◽  
North West ◽  
Canning Basin ◽  
Price Point ◽  
Exploration Drilling ◽  
Gas Fields

As part of a Geological Survey of Western Australia organised review of the Canning Basin involving UWA and CSIRO, the fault-seal potential for the northwest Canning Basin has been analysed. This study has two foci: firstly identifying potential for fault-bound hydrocarbon reservoirs in the Early Permian (Poole Sandstone and Upper Grant Group). Secondly, James Price Point, 55 km north of Broome, is the chosen location for an LNG facility to service the northern North West Shelf gas fields. As such, the study aims to highlight potential CO2 sequestration reservoir sequences occurring inside 200 km of James Price Point, the economically feasible distance for CO2 delivery to an injection site. Historically, hydrocarbon exploration drilling in the Fitzroy Trough targeted anticlinal structures, which proved unsuccessful due to localised, but significant, erosion of the Permian sequence including the Noonkanbah Formation top-seal on anticlinal crests. Given there is potential for untested, fault-bound traps to exist, which might provide an alternative to the anticlinal traps, it will be useful to identify the distribution of shale-rich, top-seal and fault-seal prone sequences, and where these occur at suitable reservoir depths. The study shows the Early Permian sequences on the flanking terraces of the Fitzroy Trough commonly have suitable top-seal and fault-seal prone sediments. In wells analysed in the Fitzroy Trough itself, the Early Permian sequence is poorly represented, but Permo-Carboniferous sediments observed indicate some sealing potential might exist there. Moving south onto the Broome Platform and into the Wiluna Sub-basin, the Early Permian sequences still display some sealing potential, but Ordovician units might provide more suitable targets for sequestration in these areas.

scholarly journals Fluid Flow Investigation through Small Turbodrill for Optimal Performance

2013 ◽  
Vol 3 (1) ◽  
pp. 1 ◽  
Author(s):  
Amir Mokaramian ◽  
Vamegh Rasouli ◽  
Gary Cavanough
Keyword(s):  
Rotation Speed ◽  
Mineral Exploration ◽  
Drilling Fluid ◽  
Small Diameter ◽  
Cfd Modeling ◽  
Design Parameters ◽  
Hard Rocks ◽  
Pressure Distributions ◽  
Flow Investigation ◽  
Exploration Drilling

Basic design methodology for a new small multistage Turbodrill (turbine down hole motor) optimized for small size Coiled Tube (CT) Turbodrilling system for deep hard rocks mineral exploration drilling is presented. Turbodrill is a type of axial turbomachinery which has multistage of stators and rotors. It converts the hydraulic power provided by the drilling fluid (pumped from surface) to mechanical power through turbine motor. For the first time, new small diameter (5-6 cm OD) water Turbodrill with high optimum rotation speed of higher than 2,000 revolutions per minute (rpm) were designed through comprehensive numerical simulation analyses. The results of numerical simulations (Computational Fluid Dynamics (CFD)) for turbodrill stage performance analysis with asymmetric blade’s profiles on stator and rotor, with different flow rates and rotation speeds are reported. This follows by Fluid-Structural Interaction (FSI) analyses for this small size turbodrill in which the finite element analyses of the stresses are performed based on the pressure distributions calculated from the CFD modeling. As a result, based on the sensitivity analysis, optimum operational and design parameters are proposed for gaining the required rotation speed and torque for hard rocks drilling.

Is there a benefit to throwing the kitchen sink at geotechnical studies in an exploration phase?

2016 ◽  
Vol 56 (1) ◽  
pp. 203
Author(s):  
James Shadlow ◽  
Adam Craig ◽  
David Christiansen
Keyword(s):  
Rock Physics ◽  
Business Case ◽  
3D Seismic ◽  
Avo Inversion ◽  
Volume Assessment ◽  
Exploration Drilling ◽  
Northern Carnarvon Basin ◽  
Seismic Amplitudes ◽  
Well Data ◽  
Gas Fields

In short, yes. This case study illustrates that the application of a thorough geotechnical workflow incorporating many new and advanced techniques can assist in exploration business case decision making. Is an exploration drilling decision made lightly? A workflow incorporating 3D seismic processing, AVO inversion and stratigraphic framework studies involving high-resolution biostratigraphic and chemostratigraphic analyses was used to assess the prospectivity of an exploration permit near giant gas fields in the offshore Northern Carnarvon Basin. The primary reservoir is the prolific Triassic Mungaroo Formation fluvio-deltaic sediments, and secondary reservoirs include mid-Jurassic marine sands. 3D seismic reprocessing xcombined a newly acquired broadband seismic dataset into a multi-survey multi-azimuth PSDM volume that conditioned data for input to an AVO inversion. New petrophysics and rock physics analysis and modelling on regional well data were then calibrated with the AVO inversion to statistically derive lithology and fluid prediction volumes. These data were used in conjunction with reservoir paleo-stratigraphy studies to derive a subsurface model for reservoir distribution and hydrocarbon prediction. A two-stage risking process was applied to each prospect that objectively applied risk based on the seismic amplitudes. This enabled a more accurate risked-volume assessment, combined with the ability to assess a prospect portfolio covering different plays. The resultant interpretation identified issues with interpretations made on vintage data that would not have been easily identified without undertaking these studies. The integration of these assessments resulted in an unfavourable exploration drilling business case and a decision not to renew the permit.

CURRENT STATE PROGRAMS FOR THE DEVELOPMENT OF HIGHER EDUCATION IN THE IRKUTSK REGION

2021 ◽  
Vol 15 (3) ◽  
pp. 274-283
Author(s):  
Yu. A. Denisova ◽  
◽  
R. Yu. Zulyar ◽  
Keyword(s):  
Higher Education ◽  
Education System ◽  
Secondary Analysis ◽  
Modern World ◽  
Sociological Research ◽  
Theoretical Understanding ◽  
Structural Problems ◽  
Quality Of Higher Education ◽  
Irkutsk Region ◽  
State Programs

Introduction. The most crucial factor in the development of a state is the status and performance of the education system. The social and economic stability of a state and its prestige in the international arena depend on how the education system meets the challenges of the modern world. The paper brief y outlines the development of universities in the Irkutsk region in the 21st century and analyzes the regional specifics of the implementation of state programs for enhancing higher education. Methods and materials. The accomplishment of the goal involved the investigation of sources represented by the normative legal acts regulating the education sector; statistical data yearbooks for recent years; and secondary analysis of sociological research data. Theoretical understanding of the topic relies on the studies presented in the monographs, dissertations, and scientific papers focusing on the development of federal and regional educational policy. Results of the research. The study has revealed some problems of the effective functioning of higher education in the region and outlined the proposals put forward to optimize this process. Conclusion. Higher education in the Irkutsk region has some structural problems that impede the development of regional higher education. Federal programs, being a tool designed to transform the education system, are unable to change this situation and do not have a significant impact on the quality of higher education at the present stage.

The V-Fields, Blocks 49/16, 49/21/, 48/20a, 48/25b, UK North Sea

2003 ◽  
Vol 20 (1) ◽  
pp. 861-870
Author(s):  
James Courtier ◽  
Hugh Riches
Keyword(s):  
North Sea ◽  
Early Permian ◽  
The North ◽  
Recoverable Reserves ◽  
Production Wells ◽  
Exploration Drilling ◽  
Structural Relief ◽  
The Uk ◽  
Gas Fields ◽  
North And South

AbstractThe Vulcan, Vanguard, North and South Valiant gas fields are collectively known as the V-Fields and lie on the eastern flank of the Sole Pit Basin in the southern sector of the UK North Sea. They are contained within blocks 49/16, 49/21, 48/20a and 48/25b and are operated by Conoco (UK) Ltd. The first field to be discovered was South Valiant, in 1970, and the initial phase of exploration drilling continued until 1983, with the discovery of the North Valiant, Vanguard and Vulcan fields. Prominent faults and dip closures define the limits of the fields and gas is contained within aeolian sands of Early Permian age. The gross average reservoir thickness is approximately 900 ft with porosities ranging from 3-23% and permeabilities varying from 0.1 mD to 2 Darcies in producing zones. The development of the V-Fields consisted of drilling centrally located production wells in each field, targeting higher quality reservoir zones in areas of maximum structural relief. Initial gas-in-place is estimated at 2.6 TCF with recoverable reserves of about 1.6 TCF. The fields were brought on-stream in October 1988 and currently produce, as of November 1999, up to 260MMSCFD of gas through the LOGGS complex to the Conoco terminal at Theedle-thorpe, Lincolnshire.

scholarly journals Fast and Facile Biodegradation of Polystyrene by the Gut Microbial Flora of Plesiophthalmus davidis Larvae

2020 ◽  
Vol 86 (18) ◽  
Author(s):  
Seongwook Woo ◽  
Intek Song ◽  
Hyung Joon Cha
Keyword(s):  
Photoelectron Spectroscopy ◽  
Bacterial Strain ◽  
Average Molecular Weight ◽  
Gel Permeation Chromatography ◽  
Community Analysis ◽  
Microbial Community Analysis ◽  
Modern World ◽  
Gut Flora ◽  
Content Type ◽  
Chromatography Analysis

ABSTRACT Polystyrene (PS), which accounts for a significant fraction of plastic wastes, is difficult to biodegrade due to its unique molecular structure. Therefore, biodegradation and chemical modification of PS are limited. In this study, we report PS biodegradation by the larvae of the darkling beetle Plesiophthalmus davidis (Coleoptera: Tenebrionidae). In 14 days, P. davidis ingested 34.27 ± 4.04 mg of Styrofoam (PS foam) per larva and survived by feeding only on Styrofoam. Fourier transform infrared spectroscopy confirmed that the ingested Styrofoam was oxidized. Gel permeation chromatography analysis indicated the decrease in average molecular weight of the residual PS in the frass compared with the feed Styrofoam. When the extracted gut flora was cultured for 20 days with PS films, biofilm and cavities were observed by scanning electron microscopy and atomic force microscopy. X-ray photoelectron spectroscopy (XPS) studies revealed that C-O bonding was introduced into the biodegraded PS film. Serratia sp. strain WSW (KCTC 82146), which was isolated from the gut flora, also formed a biofilm and cavities on the PS film in 20 days, but its degradation was less prominent than the gut flora. XPS confirmed that C-O and C=O bonds were introduced into the biodegraded PS film by Serratia sp. WSW. Microbial community analysis revealed that Serratia was in the gut flora in significant amounts and increased sixfold when the larvae were fed Styrofoam for 2 weeks. This suggests that P. davidis larvae and its gut bacteria could be used to chemically modify and rapidly degrade PS. IMPORTANCE PS is widely produced in the modern world, but it is robust against biodegradation. A few studies reported the biodegradation of PS, but most of them merely observed its weight loss; fewer were able to find its chemical modifications, which are rather direct evidence of biodegradation, by using limited organisms. Therefore, it is required to find an effective way to decompose PS using various kinds of organisms. Herein, we discovered a new PS-degrading insect species and bacterial strain, and we found that the genus that includes the PS-degrading bacterial strain occurs in significant amounts in the larval gut flora, and the proportion of this genus increased as the larvae were fed Styrofoam. Our research offers a wider selection of PS-degrading insects and the possibility of using a certain mixture of bacteria that resemble the gut flora of a PS-degrading insect to biodegrade PS, and thus could contribute to solving the global plastic crisis.

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