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1

Molecular beacons: a novel optical diagnostic tool

100%
Han S.-X., Jia X., Ma J.-L., Zhu Q.
Archivum Immunologiae et Therapiae Experimentalis
|
2013
|
tom 61
|
nr 2
2

Soil organic carbon accumulation in arid and semiarid areas after afforestation: a meta-analysis

100%
Zhang Y.-Q., Liu J.-B., Jia X., Qin S.-G.
Polish Journal of Environmental Studies
|
2013
|
tom 22
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nr 2
The rate and factors determining changes in the soil carbon pool after afforestation are still poorly understood, especially in arid and semiarid areas. This paper provides a review of the influence effect of afforestation on soil organic carbon (SOC) stocks based on a meta-analysis of 37 publications (including a total of 116 observations in the past 10 years), with the aim of exploring the major factors that can affect changes in soil carbon stocks after afforestation in arid and semiarid areas. This meta-analysis, which was based on a mixed linear model, indicates that the main factors that contribute to SOC accumulation after afforestation are previous land use, plantation age, mean annual precipitation, and mean annual temperature. It suggests that bare areas are the most suitable areas for afforestation, and that regions with precipitation of 250-400 mm and mean annual temperatures of 7.5-15ºC have a greater impact on an area’s capacity to accumulate SOC following afforestation. It shows that more SOC can be accumulated with the increase of plantation age. However, it also shows that plant species significantly affect SOC accumulation. This research will contribute to the development of policies of environment management and the models concerned with quantifying amounts of soil carbon sequestered by afforestation in these areas.
3

Carbon dioxide and precipitation alter Reaumuria soongorica root morphology by regulating the levels of soluble sugars and phytohormones

100%
Chong P., Zhan J., Li Y., Jia X.
Acta Physiologiae Plantarum
|
2019
|
tom 41
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nr 12
Significant increases in the concentration of carbon dioxide (CO₂) have been shown to cause changes in precipitation patterns. These changes can severely affect the desert ecosystem. Therefore, it is important to investigate the impacts of CO₂ concentration and precipitation on root morphology, so as to better predict the responses of desert ecosystems to the global climate change. For this purpose, we studied Reaumuria soongorica that is a dominant plant in the desert. Open top chambers were used to simulate changes in CO₂ concentrations (350 μmol mol⁻¹ and 700 μmol mol⁻¹), to study the effects of 30% reduction in precipitation (W−), natural precipitation (W), 30% increase in precipitation (W+), and to study the synergistic effects of precipitation with CO₂ on R. soongorica root morphological characteristics, endogenous hormones, and soluble sugars. Higher CO₂ levels caused a significant increase in root length, mean root diameter, root biomass, total root surface area and total root volume regardless of alterations in precipitation; whereas the root–shoot ratio increased only with increased precipitation. Elevated concentrations of CO₂ and decreased precipitation significantly increased the contents of fructose, sucrose, glucose and other soluble sugars in the R. soongorica root system. Meanwhile, the two environmental factors showed significantly synergistic effects on R. soongorica root morphology. With elevated concentrations of CO₂, R. soongorica roots showed increased levels of endogenous hormones, including abscisic acid (ABA), indole-3-acetic acid (IAA) and gibberellin (GA). The effect of precipitation on hormone levels varied among hormones. IAA and GA levels were increased, regardless of changes in precipitation; ABA decreased with higher precipitation, whereas zeatin (ZT) increased with more precipitation. Correlation analyses indicated a significant correlation between root morphology and the levels of soluble sugars and endogenous hormone, as well as between the level of soluble sugars and the level of endogenous hormones. We conclude that future changes in climate conditions such as CO₂ levels and precipitation will synergistically induce the root system of R. soongorica to undergo morphological and physiological alterations.
4

Comparing sorption characteristics of Tetrabromobisphenol-A, bisphenol-A, and 2,6-dibromophenol in a single-aolute aystem

100%
Li X., Peng X., Zhang Z., Jia X.
Polish Journal of Environmental Studies
|
2016
|
tom 25
|
nr 5
Tetrabromobisphenol-A (TBBPA) and its analogue compounds (bisphenol-A (BPA) and 2,6-dibromophenol (2, 6-DBP)) sorption on CTMAB-clays was investigated in this paper through bath experiments. Montmorillonite and kaolinite modified by CTAMB, as the adsorbent, were firstly characterized by XRD, FTIR and SEManalysis. The surface areas was determined using N2 (77K) sorption-desorption analysis. Kinetic studies showed that sorption reached equilibrium in 5 hours and followed the pseudosecond order kinetic model. The intra-particle diffusion model for sorption was also investigated and compared to identify the sorption mechanism. The sorption isotherms, well fitted by Freundlich model, were changed from being non-linear to being linear with intercalating CTMAB into clays, which indicated that CTMAB increased the partition interaction. A combination of partition and specific sorption might be contributed to TBBPA and its composition products sorption mechanism. The Freundlich coefficients (kF) and distribution coefficients (kd) for both two adsorbents were primarily increased by increasing amount of adsorbed CTMAB, while the organic carbon normalized sorption coefficients (koc) did not follow this trend. Meanwhile, 100%CEC-CTMAB-Montmorillonite showed an advantage of removal of the selected compounds than 100%CEC-CTAMB-Kaolinite. The sorption capacity of BPA was bigger than that of 2,6-DBP in spite of their similar hydrophobicity, which indicated some molecule properties might influence the sorption on CTMAB-clays. Moreover, the negative ΔG0 and ΔH0 indicated the spontaneous and exothermal process. The TBBPA sorption on CTMAB-clays was considerably enhanced in the acid condition.
5

Levels, bioaccumulation, and environmental risk of polybrominated diphenyl ethers around industry park in South China

100%
Zhang Q., Zhang Z., Jia X.
Polish Journal of Environmental Studies
|
2015
|
tom 24
|
nr 4
Industrial parks are a typical way for economic development in China, which has produced and consumed most polybrominated diphenyl ethers (PBDEs). All samples were collected around an industrial park in May and October 2011, which are extracted XAD-2 and XAD-4 resin and tested by GC-MS (Agilent 7890A/5975C). The mean levels of Σ₈PBDE in water, sediment, and soil are 5.53 ng/ml, 37.54 ng/g dw and 22.08 ng/g dw, respectively. In vegetable: Σ₈PBDE of leaf, stem, and root in water hyacinth are 35.50 ng/g dw, 52.20 ng/g dw, and 55.30 ng/g dw, respectively; and 44.70 ng/g dw, 37.80 ng/g dw and 95.10 ng/g dw in crabgrass. The level order of organs for vegetables are root > stem > leaf. The levels of PBDE of sediment effect environment more significant than others. The BCF of Σ₈PBDE in water hyacinth and crabgrass are 5.46 and 5.15. The mean ΣHQ of PBDE in sediment is 0.25, indicating low environmental risk.
6

Comparison of jasmine antioxidant system responses to different degrees and durations of shade

88%
Deng Y., Jia X., Sun X., Liang L., Su J.
Acta Physiologiae Plantarum
|
2018
|
tom 40
|
nr 02
Jasmine [Jasminum sambac (L.) Aiton] growth and development is affected by long-term shade. To determine the effects of short-term shade on jasmine physiology, the contents of soluble proteins, malondialdehyde (MDA) and antioxidative enzymes were comparatively investigated during 24 h (short-term, ST) and 7 days (medium-term, MT) of varying light regimes. The results showed that the protein content exhibited two peaks under ST treatment, and shade postponed the first peak 2 h later than full light. On the whole, protein synthesis was reduced by ST shade and induced by MT shade, whereas MDA content decreased during all shade treatments. Under ST shade, superoxide dismutase (SOD), peroxidase (POD) and ascorbate peroxidase (APX) activities were enhanced, but catalase (CAT) activity was repressed by limited irradiances. However, the antioxidant enzymes responded differently—SOD activity increased after 2 h of shading and then kept on a high level, whereas POD, APX and CAT activities increased mainly during the first hour and deceased subsequently. Under MT shade, these antioxidative enzymes responded differently to varying light irradiances, too. In general, POD and CAT activities were repressed, SOD activity was induced by weak (50% irradiance) shade and reduced by moderate (20% irradiance) and severe (5% irradiance) shade. APX activity was rather more complicated and irregularly responded to different degrees and durations of shade, meaning it might not be the main enzyme to remove ROS in jasmine plants under shading condition. The increase protein content with prolonged shade represents the sound adaptive ability of jasmine plants to restricted irradiances. At the same time, rapid changes in proteins and antioxidants reflect the efficient metabolic apparatus of the plant in response to shade. Therefore, the jasmine cultivar is shade tolerant. Furthermore, shade could help the plants protect themselves from full light, and some degrees of shade were beneficial to their antioxidant system. However, severe shade (5% of irradiance) is only suggested for a few hours to protect the plants at solar noon. If the plants are continuously shaded for 3–7 days, weak (20%) to moderate (50%) level of irradiance should be applied.
7

Effects of progressive drought stress on the physiology, antioxidative enzymes and secondary metabolites of Radix Astragali

88%
Jia X., Sun C., Li G., Li G., Chen G.
Acta Physiologiae Plantarum
|
2015
|
tom 37
|
nr 12
The dried roots of Radix Astragali are widely used in traditional Chinese medicine, and flavonoids present in the root of this herb have been implicated in its bioactivity. We subjected 2-year-old Astragalus membranaceus Bge. var. mongholicus (Bge.) Hsiao to a progressive drought stress over 14 days of water withholding and studied the physiological and biochemical responses and secondary metabolite accumulation. Results indicated that drought stress reduced relative water content, reduced yield, but increased electrolyte leakage, malondialdehyde, proline and soluble sugar content. Mild and moderate drought stress enhanced some antioxidative enzyme activity to protect plants from damaging, but antioxidative enzyme activity was limited by severe stress. The calycosin- 7-O-β-D-glycoside and ononin content of plant roots was enhanced with degree of drought stress, whereas calycosin and formononetin levels did not differ significantly until 14 days. These results demonstrate that Radix Astragali can adapt to water stress by up-regulating antioxidant enzymes and accumulation of osmotic agents, and a certain degree of drought stress can enhance accumulation of some flavonoids, potentially facilitating higher yields of pharmacological activity of calycosin-7-O-β-D-glycoside production.
8

A targeted multiple antigenic peptide vaccine augments the immune response to self TGF-beta1 and suppresses ongoing hepatic fibrosis

76%
Li Y., Wang W., Jia X., Zhai S., Wang X., Wang Y., Dang S.
Archivum Immunologiae et Therapiae Experimentalis
|
2015
|
tom 63
|
nr 4
9

A novel single nucleotide polymorphism of the POU1F1 gene associated with meat quality traits in rabbits

76%
Wang J., Li G., Elzo M. A., Yan L., Chen S., Jia X., Lai S.
Annals of Animal Science
|
2015
|
tom 15
|
nr 3
10

cDNA cloning and expression analysis of ATGL gene in four avian species*

64%
He X., Hu Y., Cai H., Li Y., Fang M., Jia X., Nie Q., Zhang X.
Animal Science Papers and Reports
|
2012
|
tom 30
|
nr 3
Adipose triglyceride lipase (ATGL) is a new key triglyceride-specific lipase that participates in the lipolysis in adipose tissue. The full cDNA of ATGL gene in Chinese francolin, pigeon, bengalessfinch and house sparrow was cloned to reveal its tissue-specific expression by mRNA real time analysis. The obtained cDNA of chinese francolin ATGL gene (cfATGL) was 1465 bp long, and contained 13 bp 5’-untranslated region (5’UTR) and 1452 bp open reading frame (ORF) encoding a 483-amino acid peptide. All the obtained cDNA of pigeon ATGL gene (pATGL), as well as that of bengaless-finch (bfATGL) and house sparrow (hsATGL) was 1459 bp long, including 13 bp 5’UTR and 1446 bp ORF encoding 481 amino acids. The identities of ATGL gene among these birds occurred no less than 88.4% by homology analysis. As indicated by mRNA real time analysis In Chinese francolin tissues, ATGL gene was predominantly expressed in leg muscle, heart and breast muscles of birds of both sexes. In pigeons, ATGL gene was shown to be predominantly expressed In abdominal fat, subcutaneous fat and breast muscle in males, and in subcutaneous fat, leg muscle,heart and abdominal fat in females. In bengaless-finch, very high ATGL mRNA level was found In subcutaneous, heart, breast muscle,abdominal and leg muscle fat in males, and in breast muscle,leg muscle, abdominal and subcutaneous fat in females. In house sparrow, higher ATGL mRNA level was detected in subcutaneous, breast muscle, leg muscle and abdominal fat in males, and in breast muscle, heart and leg muscle fat in females. In conclusion, the ATGL cDNA of Chinese francolin,pigeon, bengaless-finch and house sparrow was obtained and predominantly expressed in adipose,muscle and heart tissues.
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