Nanocomposites of Fe2O3@rGO for adsorptive removal of arsanilic acid from aqueous solution

Li-Li Sui,Li-Na Peng,Hong-Bo Xu 한국화학공학회 2021 Korean Journal of Chemical Engineering Vol.38 No.3

Arsanilic acid (ASA), an organic-arsenic veterinary drug used widely, has greatly attracted attention due to its potential threats. We report the nanocomposites of the α-Fe2O3 nanoparticles growth on reduced graphene oxide (rGO) by a one-pot method. The α-Fe2O3 nanoparticles are densely covered on the surface of rGO according to the observations of transmission and scanning electron microscope. The adsorptive capacity (357.4±11.2 mg g1 ) of the Fe2O3@rGO nanocomposites for ASA, which was more than the sum of adsorptive capacities of the pure α-Fe2O3 nanoparticles and rGO, revealed a remarkable enhancement due to the synergetic effect of multiple interactions and the good dispersion of α-Fe2O3 nanoparticles with more active binding sites in the Fe2O3@rGO nanocomposites. The adsorption equilibrium of ASA onto the Fe2O3@rGO nanocomposites was achieved for 60 min, and the adsorption of ASA was dependent of pH and temperature, and independent of the concentration of humic acid ranging from 0 to 20 mg L-1 . After five cycles of adsorption-desorption, the adsorptive amounts of ASA by the regenerative sorbent still retained 85% of adsorptive amount by the fresh sorbents. The adsorption process of ASA can be described by the Langmuir and the pseudo-second-order equations and is exothermic and spontaneous according to thermodynamic analysis.

Cloning of α-Farnesene Synthase cDNA and its Expression in Relation to α-Farnesene Synthesis in ‘White Pearman’ Apple

Meng Li,Yuan-Hu Zhang,Na Sui 한국원예학회 2006 한국원예학회 기타간행물 Vol.- No.-

Dryland agricultural environment and sustainable productivity

Gou-Xia Li,Bing-Cheng Xu,Li-Na Yin,Shi-Wen Wang,Sui-Qi Zhang,Lun Shan,곽상수,Qingbo Ke,Xi-Ping Deng 한국식물생명공학회 2020 Plant biotechnology reports Vol.14 No.2

Global climate change is expected to cause progressively increased frequency and severity of drought events, which further seriously limit plant growth and crop yields. Increasing water use effi ciency (WUE) and yield per unit rainfall are one of the most important challenges in dry land agriculture. Here, we reviewed the comprehensive technical strategies including conserving water to combine both increased agricultural productivity and resource conservation; enquiring into how crop plants respond to drought through morphological, physiological, and molecular modifi cations that occur in all plant organs; breeding for drought tolerance where there is a delineated stress environment and genotype × environment interactions are stable; eff ective conservation of rainfall and high effi ciency of use. In addition, we discussed the preponderance of biological water-saving measures, which embraces improvements in WUE and drought tolerance, by genetic improvement and physiological regulation. Sustainable agriculture would be benefi ted from modern engineering such as biological engineering, conservation tillage, and breeding technologies.

Value of Ultrasound Elastography in Assessment of Enlarged Cervical Lymph Nodes

Teng, Deng-Ke,Wang, Hui,Lin, Yuan-Qiang,Sui, Guo-Qing,Guo, Feng,Sun, Li-Na Asian Pacific Journal of Cancer Prevention 2012 Asian Pacific journal of cancer prevention Vol.13 No.5

Background: To investigate the value of ultrasound elastography (UE) in the differentiation between benign and malignant enlarged cervical lymph nodes (LNs). Methods: B-mode ultrasound, power Doppler imaging and UE were examined to determine LN characteristics. Two kinds of methods, 4 scores of elastographic classification and a strain ratio (SR) were used to evaluate the ultrasound elastograms. Results: The cutoff point of SR had high utility in differential diagnosis of benign and malignant of cervical lymph nodes, with good sensitivity, specificity and accuracy. Conclusion: UE is an important aid in differential diagnosis of benign and malignant cervical LNs.

연구논문 : 금나노물질의 in vitro 유전독성 평가연구

김지은 ( Jee Eun Kim ),이슬 ( Seul Lee ),강진석 ( Jin Seok Kang ),염영나 ( Young Na Yum ),김동섭 ( Dong Sup Kim ),박순희 ( Sui Nie Park ) 한국동물실험대체법학회 2009 동물실험대체법학회지 Vol.3 No.2

Owing to the increasing development of nanotechnology, there is a need to assess how engineered nanomaterials can interact with living cells. It is necessary to assay genotoxic risk of nanomaterials to know the effects on the DNA. We investigated the possible genotoxic potential of polyethylene glycol(PEG) coated gold nanoparticles (AuNP) with four sizes (4, 13, 100 and 200 nm diameter) to investigate the influence of particle size. These AuNP of four sizes at different dose level were exposed to the human bronchial epithelial cell line(BEAS-2B cells) and human lymphoblast cell line(TK6 cells) for 48 hours to see if there is any difference between cell types. Four nm or 100 nm AuNP at a concentration of 250 μg/ml reduced cell viability of TK6 cells more strongly, compared to BEAS-2B cells. However, no significant DNA damage was observed in both BEAS-2B cells and TK6 cells with 4 hours incubations of AuNP in the Comet assay. The results of the Ames assay and the chromosome aberration test using Chinese hamster lung(CHL) cell were also negative. In our previous study, TNF-α mRNA expression and malonaldehyde level were increased in L5178Y mouse lymphoma cells treated with AuNP. The mechanism of cytotoxicity seems to be oxidative stress. Thus, AuNP are considered non genotoxic in our study condition. However, they could exert oxidative stress mediated cytotoxicity.

Overexpression of the potato StEPF2 gene confers enhanced drought tolerance in Arabidopsis

Yanli Wang,Tian Xie,Chunli Zhang,Juanjuan Li,Zhi Wang,Hongbing Li,Xiping Liu,Li-Na Yin,Shi-Wen Wang,Sui-Qi Zhang,Xiping Deng,Qingbo Ke 한국식물생명공학회 2020 Plant biotechnology reports Vol.14 No.4

Epidermal patterning factor 2 (EPF2) is a negative regulator of stomatal development, and is essential for plant growth, development, and environmental stress responses. However, the role of EPF2 in potato (Solanum tuberosum) has not been investigated to date. Here, we cloned and characterized the potato EPF2-like gene (StEPF2). StEPF2 is predominantly intercellular space localized and its transcripts were rhythmically expressed, and showed the highest expression in apical unexpanded leaves. Expression of StEPF2 was markedly down-regulated in response to abscisic acid and sodium chloride treatments; however, upon the application of polyethylene glycol, the expression of StEPF2 peaked at 4 h and then decreased gradually. Overexpression of StEPF2 in Arabidopsis (OE) substantially reduced stomatal density and photosynthetic rate, but had little effects on plant growth. Under drought stress, OE lines maintained higher photosynthetic rates, photosystem II efficiency, and instantaneous water use efficiency than wild-type (WT) plants. Moreover, OE lines showed less water loss and hydrogen peroxide accumulation in detached leaves compared with WT plants. Thus, our results suggest that StEPF2 acts as a negative regulator of stomatal development in potato, indicating that the role of EPF2 is conserved across plant species. Overall, StEPF2 represents an important target for the development of drought-tolerant potato cultivars via genetic engineering.

금나노물질의 in vitro 유전독성 평가연구

김지은 ( Jee Eun Kim ),이슬 ( Seul Lee ),강진석 ( Jin Seok Kang ),염영나 ( Young Na Yum ),김동섭 ( Dong Sup Kim ),박순희 ( Sui Nie Park ) 한국동물실험대체법학회 2009 동물실험대체법학회지 Vol.3 No.2

Owing to the increasing development of nanotechnology, there is a need to assess how engineered nanomaterials can interact with living cells. It is necessary to assay genotoxic risk of nanomaterials to know the effects on the DNA. We investigated the possible genotoxic potential of polyethylene glycol(PEG) coated gold nanoparticles (AuNP) with four sizes (4, 13, 100 and 200 nm diameter) to investigate the influence of particle size. These AuNP of four sizes at different dose level were exposed to the human bronchial epithelial cell line(BEAS-2B cells) and human lymphoblast cell line(TK6 cells) for 48 hours to see if there is any difference between cell types. Four nm or 100 nm AuNP at a concentration of 250 μg/ml reduced cell viability of TK6 cells more strongly, compared to BEAS-2B cells. However, no significant DNA damage was observed in both BEAS-2B cells and TK6 cells with 4 hours incubations of AuNP in the Comet assay. The results of the Ames assay and the chromosome aberration test using Chinese hamster lung(CHL) cell were also negative. In our previous study, TNF-α mRNA expression and malonaldehyde level were increased in L5178Y mouse lymphoma cells treated with AuNP. The mechanism of cytotoxicity seems to be oxidative stress. Thus, AuNP are considered non genotoxic in our study condition. However, they could exert oxidative stress mediated cytotoxicity.