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The synergistic effect of boric acid and ammonium polyphosphate on the thermal degradation and flammability of pine-needles

100%
Li L., Hu H., Guo C., Hu H.
Drewno. Prace Naukowe. Doniesienia. Komunikaty
|
2014
|
tom 57
|
nr 193
The synergistic effect of ammonium polyphosphate (APP) and boric acid (BA) on the flame retardancy and thermal degradation of pine needles was investigated. Thermogravimetric analysis (TGA) showed that the presence of an ammoniumpolyphosphate and boric acid system increased the char residue and decreased the pyrolysis temperature of the pine needles. The derivative thermogravimetric analysis (DTG) showed that the ammonium polyphosphate and boric acid had shifted the degradation peaks of the pine needles to lower temperatures. The cone calorimetry test results showed that the values of HRR, THR, SPR, TSP and the mass loss (%) of the pine needles treated with ammonium polyphosphate and boric acid (APP/BA = 3/2)were significantly lower than the other samples. Therefore, the APP and BA system had a better effect on the pine needles overall than the APP alone.
2

A novel multi-objective discrete particle swarm optimization with elitist perturbation for reconfiguration of ship power system

100%
Zhang L., Sun J., Guo C.
Polish Maritime Research
|
2017
|
tom 24
|
nr Special Issue S3
A novel multi-objective discrete particle swarm optimization with elitist perturbation strategy (EPSMODPSO) is proposed and applied to solve the reconfiguration problem of shipboard power system(SPS). The new algorithm uses the velocity to decide each particle to move one step toward positive or negative direction to update the position. An elitist perturbation strategy is proposed to improve the local search ability of the algorithm. Reconfiguration model of SPS is established with multiple objectives, and an inherent homogeneity index is adopted as the auxiliary estimating index. Test results of examples show that the proposed EPSMODPSO performs excellent in terms of diversity and convergence of the obtained Pareto optimal front. It is competent to solve network reconfiguration of shipboard power system and other multi-objective discrete optimization problems
3

Temporal and spatial variations in soil TOC, TN, and TP, and their relationships in bioretention tanks

88%
Guo C., Li J., Li H., Liu Z., Li P.
Polish Journal of Environmental Studies
|
2018
|
tom 27
|
nr 6
This study aims to explore the temporal and spatial variations of soil total organic carbon (TOC), total nitrogen (TN), total phosphorus (TP), and the relationships between C/N, C/P and TOC, TN, and TP in bioretention tanks. Two bioretention tanks (tank No. 1: depth of 0~20 cm was vacant aquifer layer, 20~90cm, filled with planting soil, 90~105 cm, filled with gravel; tank No. 3: 0~20 cm was aquifer layer, 20~50 cm, filled with planting soil, 50~90 cm, filled with blast furnace slag and sand; 90~105cm, filled with gravel) were used in simulation stormwater runoff purification experiments to collect planting soil samples at intervals of one hour before inflow and 24 hours after the end of inflow. The results revealed that soil TN, TP, and TOC in 2 bioretention tanks were mainly concentrated at 10~30 cm in soil. The contents of TN and TP varied from 0.32 g kg⁻¹ to 0.50 g kg⁻¹ and from 0.83 g kg⁻¹ to 1.35 g kg⁻¹ within the investigated zone, respectively. Soil TN content in the 2 bioretention tanks before the inflow was slightly greater than after the inflow, but the opposite was true for TP, as it was less before the inflow than after. The potential of TN and TP fixation in No. 1 was higher than that in No, 3 within the upper 30 cm depth, which were related to the infiltration rate of underlying fillers (the underlying fillers of No. 1 is planting soil, and which is the blast furnace slag and sand in No. 3). The TOC content in the 2 bioretention tanks varied from 4.24 g kg⁻¹ to 8.97 g kg⁻¹, and the average contents decreased with the increasing depths. The C/N and C/P were positively correlated with TOC, while they were negatively correlated with TN and TP contents, which showed that soil C/N and C/P were mainly controlled by TOC in soil. The conclusions can provide references for the design and operation evaluation of bioretention facilities.
4

Study of a new type of Flettner rotor in merchant ships

88%
Li B., Zhang R., Li Y., Zhang B., Guo C.
Polish Maritime Research
|
2021
|
tom 28
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nr 1
5

Genome-wide identification and expression analysis of the GRAS family proteins in Medicago truncatula

88%
Song L., Tao L., Cui H., Ling L., Guo C.
Acta Physiologiae Plantarum
|
2017
|
tom 39
|
nr 04
6

Qualities and antioxidant activities of lotus leaf affected by different drying methods

76%
Guo C., Zhang N., Liu C., Xue Y., Chu J., Yao X.
Acta Physiologiae Plantarum
|
2020
|
tom 42
|
nr 02
7

Beta-hydroxybutyrate, glucose, calcium, phosphorus, and vitamin C concentrations in blood of dairy cows with subclinical ketosis during the early lactation

76%
Zhang Z., Liu G., Li X., Wang Z., Kong T., Zhang N., Guo C.
Bulletin of the Veterinary Institute in Puławy
|
2009
|
tom 53
|
nr 1
71-74
The objective of this study was to examine the association between β-hydroxybutyrate (BHBA) and glucose, calcium (Ca), phosphorus (P), and vitamin C concentrations in dairy healthy and with subclinical ketosis cows during an early lactation period. The blood from 99 healthy cows and 26 sub-clinically ketotic cows within the first two months of lactation was sampled. Serum concentration of BHBA was measured by enzymatic-rate method, glucose by oxidase method, and P by colorimetric method. These tests were performed in a biochemical auto-analyser. Serum Ca concentration was measured by atomic absorption spectrometer followed by acid digestion. Vitamin C was measured by HPLC. The results showed that in ketotic cows serum BHBA was significantly increased (P<0.01) and glucose and Ca concentrations were significantly decreased (P<0.01) as compared to healthy cows, while vitamin C and P concentrations were similar in the both groups of cows (P>0.05). The serum BHBA concentration was negatively correlated with the serum glucose and Ca concentrations (P<0.01). Vitamin C and P status of cows with subclinical ketosis was not affected by BHBA. Serum Ca concentration can be used as a reference index for the diagnosis of subclinical ketosis.
8

TaPT2, a high-affinity phosphate transporter gene in wheat (Triticum aestivum L.), is crucial in Pi uptake under phosphorus deprivation

64%
Guo C., Guo L., Li X., Gu J., Zhao M., Duan W., Ma C., Lu W., Xiao K.
Acta Physiologiae Plantarum
|
2014
|
tom 36
|
nr 06
Acquisition of inorganic phosphate (Pi) by plant roots is performed by phosphate transporters (PTs) located at the cytoplasmic membranes of epidermal cells and root hairs. A Triticum aestivum PT gene denoted as TaPT2 was functionally characterized in this study. TaPT2 is highly similar to TtPT2 and HvPT2, two PHT1 family genes in T. aestivum/Thinopyrum intermedium and barley, respectively. TaPT2 is 1,802 bp long at the cDNA level; it encodes a 525-amino acid polypeptide with a molecular weight of 57.5 kDa and an isoelectric point of 8.65. TaPT2 contains 12 conserved membrane-spanning domains and is transported to the cytosolic membrane after endoplasmic reticulum sorting. Functional complement analysis revealed that TaPT2 endowed Pi transporter activities in a yeast mutant that is defective in Pi uptake, with highaffinity Pi acquisition. TaPT2 transcripts were specifically detected in the roots. The transcripts were upregulated under Pi deprivation and downregulated under Pi sufficiency. These results suggest that TaPT2 expression is associated with external Pi concentration. Transgene analysis revealed that TaPT2 overexpression or knockdown did not regulate plant dry mass production, Pi acquisition, and photosynthetic capacity under Pi sufficiency. Under Pi deprivation, TaPT2 overexpression increased plant dry mass accumulation, total P content per plant, and photosynthetic efficiencies, whereas TaPT2 downregulation reduced plant dry mass, accumulative P amount, and photosynthetic parameters. These results collectively suggest that TaPT2 is a high-affinity PHT1 member that has important functions in mediating plant Pi uptake under Pi deprivation. TaPT2 can serve as a useful gene resource for the improvement of phosphorus use efficiency in cereals under Pi deprivation.
9

Optimization of immunization procedure for Eimeria tenella DNA vaccine pVAX1-pEtK2-IL-2 and its stability

64%
Zhang B., Yuan C., Song X., Xu L., Yan R., Shah M. A. A., Guo C., Zhu S., Li X.
Acta Parasitologica
|
2019
|
tom 64
|
nr 4
10

Molecular cloning and characterization of squalene synthase from Matricaria recutita L

64%
Hou X., Tai Y., Ling S., Li D., Guo C., Sun J., Pan G., Yuan Y.
Acta Physiologiae Plantarum
|
2018
|
tom 40
|
nr 06
11

Expression of Angiopoietin-1 and the receptor Tie-2 mRNA in rat brains following intracerebral hemorrhage

52%
Zhou H., Tang T., Guo C., Zhang H., Zhong J., Zheng J., Luo J., Lin Y., Liu W., Luo W., Yang Q.
Acta Neurobiologiae Experimentalis
|
2008
|
tom 68
|
nr 2
Angiopoietin-1 (Ang-1) belongs to a novel family of endothelial growth factors that function as ligands for an endothelialspecific receptor tyrosine kinase (Tie-2). The Ang-1/Tie-2 system may contribute to angiogenesis and vascular remodeling by mediating interactions of endothelial cells with smooth muscle cells and pericytes. The spatial distribution and temporal expression of Ang-1 and Tie-2 in the rat brain were studied following collagenase-induced intracerebral hemorrhage (ICH), by immunohistochemistry and reverse transcription-polymerase chain (RT-PCR) analysis, respectively. Immunohistochemical analysis revealed that some Ang-1 or Tie-2-positive dilated vessels resided around the hematoma and extended into the clot. RT-PCR analysis showed that Ang-1 and Tie-2 mRNA signal was detected at 2 days and persisted for 28 days after ICH. These findings suggest that ICH could lead to upregulation of Ang-1 and the receptor Tie-2 mRNA.
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