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1

Simulation and experimental study of SCR injection system

100%
Du J., Zhang Y., Cai Z.
Polish Maritime Research
|
2018
|
tom 25
|
nr Special Issue S2
According to actual engineering test, we design a linear controlled spray ammonia grille, and apply it to the SCR injection system of ship tail gas treatment. In this paper, the geometric model of ammonia injection grid was built in the flue of diesel engine, and the effects of spray atomization, ammonia uniformity and urea droplet distribution on spray atomization were simulated. Then the test bench was set up to observe the injection status of the ammonia injection grille. The NOx content of the outlet was measured by the original data of the flue gas, and the experimental data were processed. We calculate the denitrification rate by taking the average value to verify the correctness of the spray ammonia grid scheme
2

Modelling and optimisation of vacuum collection system for cruise ship kitchen garbage

100%
Du J., Li R., Wu X., Zhao H.
Polish Maritime Research
|
2020
|
tom 27
|
nr 1
Pollution of the marine environment by ship garbage is an urgent problem to be solved at home and abroad. The ship kitchen garbage vacuum collection system is a new environmental protection scheme for garbage disposal. It has many advantages, such as using a pipeline instead of manual operation, creating high-level sanitary conditions, realising completely closed garbage collection and transportation, eliminating cross-pollution, saving space and so on. In this paper, the system is modelled, and the calculation of pipeline pressure loss, the vacuum degree of the vacuum tank and the energy consumption of the system are briefly introduced. In order to reduce the energy consumption, an algorithm for the emptying and discharging port is presented. In order to solve the problem of optimising relevant parameters, the vacuum transport mechanism of garbage is studied based on an optimisation model of the pipe network, and the experimental platform of a simulation device is set up. In engineering, this is of great significance to the design of cruise ship garbage collection and treatment systems and the development of supporting technology
3

The effect of volatile oil from Chinese mugwort leaf on human demodecid mites in vitro

100%
Du J., Gao R., Zhao J.
Acta Parasitologica
|
2021
|
tom 66
|
nr 2
4

Numerical investigation of the undrained compression and pull-out capacity of suction foudations in clay

100%
Du J., Du S., Shen S., Yin Z.
Polish Maritime Research
|
2015
|
tom 22
|
nr Special Issue S1
This paper presents the results of three-dimensional finite difference analysis of suction foundations in uniform and non-uniform clays under undrained conditions. The Tresca criterion was used to simulate the stress-strain response. The bearing capacity of the foundations was investigated, with the degree of nonhomogeneity (kD/sum) of soil varying from 0 to 5, and the embedment depth being up to four times the foundation diameter. The end bearing capacity factor in compression and the reverse bearing capacity factor in tension were both calculated and were compared with each other under different foundation displacements. Numerical results showed that the ultimate bearing capacity factor can have the same value in cases of both compression and tension. The recommended ultimate bearing capacity factor is determined on the basis of the embedment ratio and displacement magnitude, and the displacement is not more than 30% of the foundation diameter. Finally, two equations are proposed to evaluate both the bearing capacity factor and the effective depth factor
5

Study on optimization simulation of SCR denitration system for marine diesel engine

100%
Du J., Li R. N., Wu X., Zhang Y.
Polish Maritime Research
|
2018
|
tom 25
|
nr Special Issue S3
With the rapid development of shipbuilding industry exhaust world is also very harmful one kind of environmental issues, and the ship marine diesel engine exhaust gas is mainly produced, so in recent years it has developed a diesel engine SCR system. SCR system can control emissions of nitrogen oxides in the exhaust of vessel, furthermore air pollution can be reduced. The main goal of article was using fluent software to correct SCR system selection and flue gas flow under different size best deflector arrangement is simulated. Next goal is further optimize the structure of the SCR system
6

Peroxidation of proteins and lipids in suspensions of liposomes, in blood serum, and in mouse myeloma cells

100%
Gebicki J. M., Du J., Collins J., Tweeddale H.
Acta Biochimica Polonica
|
2000
|
tom 47
|
nr 4
There is growing evidence that proteins are early targets of reactive oxygen species, and that the altered proteins can in turn damage other biomolecules. In this study, we measured the effects of proteins on the oxidation of liposome phospholipid membranes, and the formation of protein hydroperoxides in serum and in cultured cells exposed to radiation-generated hydroxyl free radicals. Lysozyme, which did not affect liposome stability, gave 50% protection when present at 0.3 mg/ml, and virtually completely prevented lipid oxidation at 10 mg/ml. When human blood serum was irradiated, lipids were oxidized only after the destruction of ascorbate. In contrast, peroxidation of proteins proceeded immediately. Protein hydroperoxides were also generated without a lag period in hybrid mouse myeloma cells, while at the same time no lipid peroxides formed. These results are consistent with the theory that, under physiological conditions, lipid membranes are likely to be effectively protected from randomly-generated hydroxyl radicals by proteins, and that protein peroxyl radicals and hydroperoxides may constitute an important hazard to biological systems under oxidative stress.
7

A SWAT Model-Based simulation of the effects of non-point source pollution control Mmasures on a River Basin

88%
Li J., Du J., Li H., Li Y., Lin Z.
Polish Journal of Environmental Studies
|
2015
|
tom 24
|
nr 3
8

Effects of 24-epibrassinolide on ascorbate–glutathione cycle and polyamine levels in cucumber roots under Ca(NO3)2 stress

76%
Yuan L.-Y., Du J., Yuan Y.-H., Shu S., Sun J., Guo S.-R.
Acta Physiologiae Plantarum
|
2013
|
tom 35
|
nr 01
The effects of 24-epibrassinolide (EBL) applied by spraying the leaves of Cucumis sativus L (cv. Jinyou No.4) on the roots of ascorbate–glutathione (AsA–GSH) cycle and levels and forms of polyamines were investigated under Ca(NO3)2 stress. Ca(NO3)2 stress caused significant decreases in ascorbate acid (AsA) and glutathione (GSH) levels and the activities of antioxidant enzymes involved in the AsA–GSH cycle, including ascorbate peroxidase (APX, EC 1.11.1.11), glutathione reductase (GR, EC 1.6.4.2), monodehydroascorbate reductase (MDAR, EC 1.6.5.4) and dehydroascorbate reductase (DHAR, EC 1.6.5.4). In contrast, exogenous EBL in NB combination increased AsA and GSH levels through enhancing activities of APX, GR, MDAR and DHAR. This alleviated the declines of AsA/ DHA and GSH/GSSG ratios, which could maintain cellular homeostasis. In addition, EBL application reduced the accumulation of putrescine (Put) induced by excess Ca(NO3)2, and promoted the conversion of Put into spermidine (Spd) and/or spermine (Spm) able to bind to cell membrane structures. These results showed that EBL could alleviate the damage from oxidative stress by up-regulating the capacity of the AsA–GSH cycle and altering polyamine levels and forms.
9

SFRP2 enhances the osteogenic differentiation of apical papilla stem cells by antagonizing the canonical WNT pathway

52%
Jin L., Cao Y., Yu G., Wang J., Lin X., Ge L., Du J., Wang L., Diao S., Lian X., Wang S., Dong R., Shan Z.
Cellular and Molecular Biology Letters
|
2017
|
tom 22
10

Aggregation formation mediated anoikis resistance of BEL7402 hepatoma cells

52%
Zhang Z., Han L., Cao L., Liang X., Liu Y., Liu H., Du J., Qu Z., Zhu C., Liu S., Li H., Sun W.
Folia Histochemica et Cytobiologica
|
2008
|
tom 46
|
nr 3
331-336
11

OsRhoGAP2 promoter drives inflorescence-preferential expression and confers responses to abiotic stresses in transgenic Arabidopsis

52%
Huang J., Yan X., Li J., Shi J., Peng J., Du J., Ge H., Wang M., An W., Wang K., Wang H., Liang W.
Acta Physiologiae Plantarum
|
2019
|
tom 41
|
nr 05
Plants deploy different strategies to respond and adapt to various stresses. Given that stresses affect plant growth and activity, the responses and tolerance of crops to stresses must be improved through genetic engineering. Inducible promoters, which have vital roles in gene expression and function, are highly desired in biotechnology applications. Thus, novel inducible promoters must be isolated and identified for genetic engineering to improve crop stress responses and tolerance. OsRhoGAPs are involved in plant defense against diverse stresses. In this study, we identified OsRhoGAP2, which is preferentially expressed in rice inflorescences. We isolated the OsRhoGAP2 promoter and analyzed its functions in transgenic Arabidopsis. We fused the GUS reporter with six 5′ deletion fragments (gp1–gp6) of the OsRhoGAP2 promoter with different lengths. Through histochemical analysis, we detected GUS activity in the inflorescences of transgenic Arabidopsis containing gp1, gp3, gp4, and gp5 constructs but not in transgenic Arabidopsis containing gp2 and gp6 constructs. The GUS activity in transgenic plants containing gp1–gp6 constructs changed under different stress treatments. Bioinformatics analysis and experimental results revealed that the core fragment involved in the inflorescence-preferential expression of OsRhoGAP2 and stress responses may be located in the − 706 bp to + 1 bp, or the translated start site, of OsRhoGAP2. Results indicate that OsRhoGAP2 has a conserved role in stress tolerance and exhibits tissue-specific expression patterns in several plant species. This work provides novel insights into the appropriate promoter resources for plant genetic transformation and useful references for biotechnologists to improve stress tolerance in rice.
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