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1.
I. A. Shevchuk N. A. Klimenko S. S. Stavskaya 《Journal of Water Chemistry and Technology》2010,32(3):176-181
We have investigated the influence of individual components of waters (humic acids, anions, and cations) on sorption of ions
of U(VI) and strontium by the biosorbent based on the Bacillus polymyxa IMV 8919 cells. It is shown that during transition to real aqueous systems there occurs a decrease of the degree of extracting
U(VI) and strontium by a microbial sorbent. Extraction of strontium in a great degree depends on the concentration in water
of bivalent cations, which may compete with it in the sorption processes. A degree of purification of U(VI) is mainly determined
by the pH of the medium. Acidification of aqueous media containing uranium, up to pH 5 makes it possible to raise the degree
of extraction of metals by means of a biosorbent 相似文献
2.
It was found that Bacillus polymyxa IMV 8910 bacterium possesses high sorption capacity with respect to U(VI) and strontium ions. We have investigated the impact of the
given elements on the rate of the growth and increment of the bacteria biomass. It has been found that sorption capacity of
thermoin-activated biomass does not differ from the intact one; maximum sorption constitutes ∼800 and 330 μmol/g of dry matter
respectively for U(VI) and strontium. The inhibition analysis and stimulation of the energy exchange of the cell by glucose
showed that the processes of sorption of U(VI) and strontium by the biomass of B. polymyxa IMV 8910 did not depend on metabolic activity of the cell, i.e., are implemented by the mechanism of biosorption. 相似文献
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Thomas Kurz 《Baurechtliche Bl?tter: bbl》2011,14(6):258-264
Wer das Baugrundrisiko tr?gt, wird von § 1168a ABGB eindeutig zugeordnet: Das Baugrundrisiko tr?gt der, der den Baugrund ausw?hlt
und beistellt, also der, aus dessen „Sph?re“ der Baugrund stammt. Wenusch hat in seinem Artikel diesen Grundsatz hinterfragt, hat aber überlegungen zur Bedeutung bzw. den Auswirkungen einer funktionalen
Leistungsbeschreibung überschie?end auf diese gesetzliche Risikozuordnung übertragen. Auf Grund der gro?en Bedeutung dieser
Thematik für die betroffenen Verkehrskreise ist eine Replik angezeigt. 相似文献
5.
I. Z. Koval V. N. Kislenko V. L. Starchevskii L. I. Shevchuk 《Journal of Water Chemistry and Technology》2012,34(2):112-116
The effect of the volume of carbon dioxide gas released from aqueous solution on the reduction of the number of vegetative
microorganisms per unit volume of the system has been investigated. A linear relationship between the number of vegetative
microorganisms and the volume of released carbon dioxide is observed, when the volume of the released gas does not exceed
the level of 0.5 dm3/dm3 of solution. The increasing ratio of the amount of spores to the number of vegetative bacteria of Bacillus genus results in a largely reduced impact of the volume of released carbon dioxide on the microbial viability. 相似文献
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Işık Yilmaz Mustafa Yildirim Inan Keskin 《Bulletin of Engineering Geology and the Environment》2008,67(4):547-554
Rockfalls are a natural process of cliff and hillside erosion and can be simulated by computer programs. RocFall is a useful and well-known program which produces envelopes of kinetic energy, velocity, bounce height and fall-out distance
for a selected profile. However, with this program it is difficult to record the spatial distribution of the envelopes in
their exact coordinates in GIS. In this paper, a method and computer code (FallGIS) written by the authors is proposed for
mapping the results obtained from RocFall in ArcGIS. As it is both user-friendly (hence quicker) and does not require any new software, it is hoped it will be a useful tool
for engineering geologists, urban planners, etc.
相似文献
8.
Mohammad Abdul Mohit Nurul Nazyddah 《Journal of Housing and the Built Environment》2011,26(2):143-164
Social housing in Malaysia is provided through the public and private sectors. Recently, the Selangor Zakat Board (SZB) has started to provide social housing in the state of Selangor, Malaysia. Up to 2007, a total of 906 units have
been delivered under its different programmes. This paper evaluates these programmes by adopting the housing satisfaction
model which is currently used as a customer satisfaction tool for public/private housing in many local governments in the
UK and USA. The main purpose of this paper is to identify the types of housing programmes adopted by SZB and examine beneficiaries’
housing satisfaction in each programme on a comparative plane. In order to examine housing satisfaction, five objective components
of satisfaction—housing unit features, housing unit support services, the social environment, public facilities and neighbourhood
facilities—were analysed through beneficiaries’ levels of satisfaction which were measured by applying a Likert scale. The
findings of the paper indicate that SZB has been successful in providing a moderate level of satisfaction with the housing
unit. However, the existence of variable levels of satisfaction with other components implies that there is still scope to
enhance residents’ satisfaction with those components. 相似文献
9.
I. I. Romanovskaya Yu. A. Shesterenko O. V. Sevast’yanov I. E. Brusilovskii 《Journal of Water Chemistry and Technology》2010,32(1):61-65
We have considered the method of oxidizing aqueous solutions of phenol (0.25–2.00 mmol/dm3) with the use of a biocatalyst—a partially purified tyrosinase immobilized into calcium alginate. In optimal conditions (pH
7.2, T—25°C, transformation time—one hour, phenoloxidase activity—25–200 unit/cm3) when adding a PEG-6000 stabilizer the preparation stabilized complete oxidation of phenol in a periodic-action reactor during
12 cycles and retained a high degree of transformation of the substrate during the following 16 cycles. The concentrations
of coagulants necessary for elimination of transformation products using the immobilized enzyme were reduced 2.5-fold compared
with such for a free biocatalyst. 相似文献
10.
Gregory DeAngelo Amitrajeet A. Batabyal Seshavadhani Kumar 《The Annals of Regional Science》2007,41(3):639-655
DeAngelo et al. (New approaches to the Economics of plant health. Springer, Heidelberg, 2006) have recently used the AWS criterion in a M/G/1 queuing model to show that there is no necessary tension between economic cost minimization and inspection stringency in non-native species management. In this
paper, we use an alternate cost criterion (AWQ criterion) to investigate the generality of this central result in DeAngelo et al. (New approaches to the Economics of plant
health. Springer, Heidelberg, 2006). Our theoretical analysis shows that there is no unambiguous answer to this question.
Therefore, we use numerical methods and our numerical analysis leads to two findings. First, for many values of the model
parameters that describe the strictness of inspections, there is a tension between cost minimization and inspection stringency. Second, for most values of the model parameter that depicts
the volume of maritime trade handled by the seaport under consideration, there is no tension between cost minimization and inspection stringency.
相似文献
11.
This paper describes an application of the geological strength index (GSI) method to the San Mauro formation, which is characterized by sandstones alternating with argillaceous marls. The Sandstone/Pelite (S/P) ratio and
structural complexity were determined. Geo-structural and geo-mechanical surveys were undertaken in situ and rock samples
were tested in the laboratory. A map of the S/P ratio was produced showing the bedrock divided in four classes. Three ranges
of GSI values were identified. The values of the intact UCS and of the constant m
i
were appropriately reduced to reflect the variable presence of sandstone compared with the pelitic fraction. A “weighted
average” of the intact strength properties of the hard and weak layers was adopted. The values for the intact materials were
reduced from 20 to 60% depending on the GSI categories of the heterogeneous rock mass. In this way, seven classes of rock
masses characterized by different values of GSI, reduced UCS and m
i
values were identified. 相似文献
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G. F. Smirnova 《Journal of Water Chemistry and Technology》2009,31(5):341-344
The paper has proposed a mathematical model adequately describing the process of reducing chlorates by the culture Acinetobacter thermotoleranticus C-1 in the presence in the medium of the components incorporated into the wastewater composition of the ignition compound
industry. It is shown that an adverse impact on the rate of chlorate utilization is produced by zinc and chromates. Phosphates
slow down chlorate reduction a little. The presence of trivalent iron stimulates microbial reduction of chlorates. 相似文献
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T. I. Levadnaya O. S. Savluk N. M. Soboleva N. G. Potapchenko V. V. Goncharuk 《Journal of Water Chemistry and Technology》2009,31(3):201-204
It was found that in the water containing impurities in the presence of ozone radical reactions occur. In this case stable activated oxygen-containing radicals as well as radicals of organic compounds are formed. The radicals play a significant role in the processes of water decontamination with ozone. 相似文献
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M. N. Saprykina E. S. Bolgova V. V. Goncharuk 《Journal of Water Chemistry and Technology》2016,38(3):181-185
The paper has investigated the influence of NaOCl on the cells of Candida albicas with the aim of finding viable noncultural state and also conditions of their rehabilitation. Microscopic research of the cells Candida albicans has been given in the indicated state colored with trypan blue. 相似文献
20.
N. M. Soboleva M. N. Saprykina V. N. Kosinova A. A. Nosonovich V. V. Goncharuk 《Journal of Water Chemistry and Technology》2012,34(2):96-102
The paper has investigated photocatalytic decontamination of the culture of micromycetes Candida albicans in water media depending on the radiation dose (UV-A range), the pH of the medium, the concentration of H2O2, ions of iron (II), (III), and phosphate ions. We proposed the interpretation of the impact of the specified factors on the
rate of the course of the process being investigated. We showed prospects of using the UV/H2O2 and photo-Fenton systems as applied to decontamination of water media from micromycetes Candida albicans. 相似文献