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The Vis-NIR multicolor emitting phosphor Ba4Gd3Na3(PO4)6F2: Eu2+, Pr3+ for LED towards plant growth
Ziwei Zhou,Niumiao Zhang,Jiayu Chen,Xianju Zhou,Maxim S. Molokeev,Chongfeng Guo 한국공업화학회 2018 Journal of Industrial and Engineering Chemistry Vol.65 No.-
Photosynthesis process is the basic for plant growth, which needs energy from the light. The pigments of chlorophyll a, b and bacteriochlorophyll are responsible for the absorption of light, in which blue, red and near-infrared (NIR) light directly or indirectly promote the plant growth and enhancement of nurtiments. It is important for plant to support absorbable light, and phosphhor-converted light emitting diodes (pc-LEDs) are low-cost, energy-saving and enviromental friendly devices for plant growth. To develop a phosphor with emission covering the blue, red and NIR, a series of phosphors Ba4Gd3Na3(PO4)6F2: Eu2+, Pr3+ with blue, red and NIR multi-emitting were prepared. Their emissions not only match well with the absorption spectra of pigments in the plant, but also could be excited by near ultraviolet (n-UV) LED chip. The crystal structure of host Ba4Gd3Na3(PO4)6F2 was refined from the XRD data and three different crystallographic sites occupied by Eu2+ were determined through low temperature photoluminescence spectra. The energy transfer from Eu2+ to Pr3+ ions was also discussed in detail. Results indicated that the multi-emitting Ba4Gd3Na3(PO4)6F2: Eu2+, Pr3+ can serve as a phosphor candidate for plant growth LEDs.
Jialing Che,Ziwei Guo,Quanwei Li,Haifeng Liu 대한토목학회 2022 KSCE Journal of Civil Engineering Vol.26 No.12
At present, the exploitation of river sand is forbidden because of the harm to the environment. The production processes of microsilica sand are complicated and the cost is high. The excellent availability of desert sand provides a practical solution for using it as the aggregate, this research used high-volume fly ash, steel fiber, PVA fiber and some or all of the Mu Us desert sand to replace the river sand to prepare the Desert-Sand-based steel-PVA hybrid Fiber Reinforced ECC (H-DSECC) that meets the performance requirements. Through the single factor test, the steel fiber replacement rate and the desert sand replacement rate were taken as the main factors, and the mechanical properties of H-DSECC were initially explored. The results show that the high steel fiber replacement rate or high desert sand replacement rate is not conducive to the realization of strain-hardening. An H-DSECC mixture containing 40% desert sand with W/B ratio of 0.29 has delivered the best properties with the tensile strain capacity of 1.467%, the tensile strength is 7.5 MPa and the cylinder compressive strength is 41.03 MPa at 28 days. Based on the measured stress-strain curves, the uniaxial tension/compression stress-strain curve equations are proposed.
Yang Miaomiao,Liu Ziwei,Yu Yuanhui,Yang Min,Guo Li,Han Xuejie,Ma Xiangjie,Huang Ziya,Gao Qiguo 한국유전학회 2023 Genes & Genomics Vol.45 No.7
Background The plant-specific valine-glutamine (VQ) motif containing proteins tightly regulate plant growth, development, and stress responses. However, the genome-wide identification and functional analysis of Brassica oleracea (B. oleracea) VQ genes have not been reported. Objective To identify the VQ gene family in B. oleracea and analyze the function of Bo25-1 in pollen germination. Methods The Hidden Markov Model (HMM) of VQ family was used to query the BoVQ genes in the B. oleracea genome. The BoVQ genes preferentially expressed in anthers were screened by qRT-PCR. Subcellular localization of VQ25-1 was observed in Nicotiana benthamiana (N. benthamiana) leaves. To analysis the role of BoVQ25-1 in pollen germination, the expression of BoVQ25-1 was suppressed using antisense-oligonucleotides (AS-ODN). Results A total of 64 BoVQ genes were identified in the B. oleracea genome. BoVQ25-1 was found to be preferentially expressed in the B. oleracea anthers. BoVQ25-1 was cloned from the anthers of the B. oleracea cultivar ‘Fast Cycle’. BoVQ25-1 is localized to the nucleus. The pollen germination rate significantly decreased after AS-ODN treatment. Conclusion Sixty-four BoVQ genes were identified in the B. oleracea genome, of which BoVQ25-1 plays an important role in pollen germination.
Shan-hu Qiu,Ziwei Du,Weiling Li,Juan Chen,Hang Wu,Jingbao Liu,Min Cai,Bei Wang,Haijian Guo,Zi-lin Sun 대한진단검사의학회 2020 Annals of Laboratory Medicine Vol.40 No.6
Background: Diabetes can complicate hypertension management by increasing the risk of cardiovascular disease (CVD) and all-cause mortality. Studies targeting diabetes detection in hypertensive individuals demonstrating an increased risk of diabetes are lacking. We aimed to assess the performance of hemoglobin A1c (HbA1c) and its cut-off point in detecting diabetes in the abovementioned population. Methods: Data from 4,096 community-dwellers with hypertension but without known diabetes were obtained from the Study on Evaluation of iNnovated Screening tools and determInation of optimal diagnostic cut-off points for type 2 diaBetes in Chinese muLti-Ethnic (SENSIBLE) study; these data were randomly split into exploration (70% of the sample) and internal validation (the remaining 30%) datasets. The optimal HbA1c cut-off point was derived from the exploration dataset and externally validated using another dataset from 2,431 hypertensive individuals. The oral glucose tolerance test was considered the gold-standard for confirming diabetes. Results: The areas under the ROC curves for HbA1c to detect diabetes were 0.842, 0.832, and 0.829 for the exploration, internal validation, and external validation datasets, respectively. An optimal HbA1c cut-off point of 5.8% (40 mmol/mol) yielded a sensitivity of 76.2% and a specificity of 74.5%. Individuals who were not diagnosed as having diabetes by HbA1c at 5.8% (40 mmol/mol) had a lower 10-year CVD risk score than those diagnosed as having diabetes (P=0.01). HbA1c≤5.1% (32 mmol/mol) and ≥6.4% (46 mmol/mol) could indicate the absence and presence of diabetes, respectively. Conclusions: HbA1c could detect diabetes effectively in community-dwellers with hypertension.