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Ya-Jun Gong,Jin-Cui Chen,Shao-Kun Guo,Pan Shi,Li-Jun Cao,Ming-Liang Li,Ary A. Hoffmann,Shu-Jun Wei 한국응용곤충학회 2020 Journal of Asia-Pacific Entomology Vol.23 No.4
The fall webworm (FWW) Hyphantria cunea, native to North America, is a globally invasive pest of a wide range of forest and fruit trees. Spraying of pesticides is the primary method for the control of FWW. In this study, toxicity and feeding cessation of two potential pesticides against the FWW, chlorantraniliprole, and chromafenozide, were evaluated. Both pesticides were slow to affect FWW. For chlorantraniliprole, the highest mortality of third instar larvae occurred at 72 h with an LC 50 of 10.34 mg/L, while for chromafenozide, the highest mortality occurred at 72 h with an LC 50 value 74.0950 mg/L. Low concentrations of both pesticides led to larvae ceasing to feed after six hours (chlorantraniliprole) and 24 h (chromafenozide). Both pesticides had persistent effects; thirty days after being applied at concentrations of 16, 26.67, and 35.56 mg/L to leaves, 93.33% of newly contacted larvae died after seven days. Our study showed that chlorantraniliprole and chromafenozide could be alternatively used against FWW and form a component of integrated control programs. The results provide information to guide the usage of chlorantraniliprole and chromafenozide in FWW control.
Roles of Immunohistochemical Staining in Diagnosing Pulmonary Squamous Cell Carcinoma
Yan, Yue,Zhang, Ya-Xiong,Fang, Wen-Feng,Kang, Shi-Yang,Zhan, Jian-Hua,Chen, Nan,Hong, Shao-Dong,Liang, Wen-Hua,Tang, Yan-Na,He, Da-Cheng,Wu, Xuan,Zhang, Li Asian Pacific Journal of Cancer Prevention 2015 Asian Pacific journal of cancer prevention Vol.16 No.2
Background: Differentiating morphologic features based on hematoxylin-eosin (HE) staining is the most common method to classify pathological subtypes of non-small-cell lung cancer (NSCLC). However, its accuracy and inter-observer reproducibility in pathological diagnosis of poorly differentiated NSCLC remained to be improved. Materials and Methods: We attempted to explore the role of immunohistochemistry (IHC) staining in diagnosing pulmonary squamous cell carcinoma (SQCC) with poorly differentiated features by HE staining or with elevated serum adenocarcinoma-specific tumor markers (AD-TMs). We also compared the difference of epidermal growth factor receptor (EGFR) mutation rate between patients with confirmed SQCC and those with revised pathological subtype. Logistic regression analyses were used to test the association between different factors and diagnostic accuracy. Results: A total of 132 patients who met the eligible criteria and had adequate specimens for IHC confirmation were included. Pathological revised cases in poor differentiated subgroup, biopsy samples and high-level AD-TMs cases were more than those with high/moderate differentiation, surgical specimens and normal-level AD-TMs. Moreover, biopsy sample was a significant factor decreasing diagnostic accuracy of pathological subtype (OR, 4.037; 95% CI 1.446-11.267, p=0.008). Additionally, EGFR mutation rate was higher in patients with pathological diagnostic changes than those with confirmed SQCC (16.7% vs 4.4%, p=0.157). Conclusions: Diagnosis based on HE staining only might cause pathological misinterpretation in NSCLC patients with poor differentiation or high-level AD-TMs, especially those with biopsy samples. HE staining and IHC should be combined as pathological diagnostic standard. The occurrence of EGFR mutations in pulmonary SQCC might be overestimated.
Xiao-Lin Luo,Ya-Shao Chen,Min-Juan Wang,De-Suo Yang,Jie Yang 한국공업화학회 2015 Journal of Industrial and Engineering Chemistry Vol.32 No.-
Cu2O micro-crystals with different morphologies (including three branching structures) weresynthesized through hydrothermal method by using sodium tartrate as chelating reagent. Branchinggrowth patterns of Cu2O microcrystals have a strong dependence on the amount of sodium tartrate. These different Cu2O microcrystals were used as catalysts to promote the thermal decomposition ofammonium perchlorate (AP). The thermal decomposition of AP in the presence or absence of Cu2Omicro-crystals was investigated non-isothermally through thermogravimetry and differential scanningcalorimetry (DSC). The data obtained from DSC were applied for the calculation and comparison of thekinetic parameters of AP decomposition process through a model-free approach.
Yuan Wang,Yan-Ling Luo,Feng Xu,Ya-Shao Chen,Wei Tang 한국공업화학회 2017 Journal of Industrial and Engineering Chemistry Vol.48 No.-
Ferrocene-containing amphiphilic block copolymers, poly(2-acryloyloxyethyl ferrocenecarboxylate)-block-poly(2-(dimethylamino) ethyl methacrylate) (PAEFc-b-PDMAEMA), were synthesized via sequen-tial ATRP, and self-assembled into globular nanoscaled micelle aggregates. The copolymer micellesexhibited reversible redox on-off switch feature, which was mediated by using H2O2, KMnO4, NaClO andFeCl3 as a model of oxidants and ascorbic acid as a model of reductants. The micelle nanoparticles wereused to load and deliver anticancer drug, 10-hydroxycamptothecine,finding that the encapsulated drugwas rapidly delivered by selectively responding to redox environments in cancer cells. MTT assays wereperformed to uncover cytotoxicity of the developed copolymer micelles and potentiality used for cancertherapy.
Rui-Qian Zhang,Zhan-Qing Liu,Yan-Ling Luo,Feng Xu,Ya-Shao Chen 한국공업화학회 2019 Journal of Industrial and Engineering Chemistry Vol.80 No.-
To overcome premature drug leakage and instability in drug delivery systems, we designed tri-stimuliresponsive multiwalled carbon nanotubes covered by mesoporous silica graft poly(N-isopropylacryla-mide-block-poly(2-(4-formylbenzoyloxy) ethyl methacrylate) multifunctional materials via disulfidelinkages (MWCNTs@MSN-s-s-g-PNIPAM-b-PFBEMA). The multifunctional materials could covalentlybind and physically load anticancer drug doxorubicin (DOX), and exhibited pH-, temperature- andreductant-induced multi-stimuli responsiveness, significantly enhancing drug loading capacity andimproving the release dynamics of drug. The DOX-loaded multifunctional materials exhibited theoptimal release behavior in cancer environments compared with in normal cells upon simultaneouslytriggered by these stimuli. It meant that the MWCNTs@MSN-s-s-g-PNIPAM-b-PFBEMA could serve asefficient gatekeepers to control the mesopore on–off and thus to modulate drug release. Themultifunctional materials were proved to be low toxic, whereas the DOX-loaded counterparts had almostthe same toxicity as free DOX to cancer cells. Therefore, the developed multifunctional materials can beused as promising drug controlled delivery platforms for cancer therapy.
Jian-Guo Zhang,Xue-Yin Zhang,Hua Yu,Yan-Ling Luo,Feng Xu,Ya-Shao Chen 한국공업화학회 2018 Journal of Industrial and Engineering Chemistry Vol.65 No.-
Gold nanoparticles decorated stimuli-responsive copolymer hybrids, poly(2-methacryloyloxyethyl ferrocenecarboxylate)-block-poly(N-isopropylacryamide) decorated with gold nanoparticles, were synthesized through two-step successive RAFT and ensuing in-situ reduction. The hybrids could self-assemble into interesting micelle structures from globular, wormlike to rodlike shapes by altering the quality and compositions of solvents and ionic strength, and exhibited multifunctionality including quasi-reversible electrochemical behavior, redox-stress responsiveness and temperature sensitivity. The physicochemical and electrochemical properties were modulated by tailor-making the system compositions and redox reaction. The copolymer hybrids were expected to broaden their applications in nanobiomedicine including targeted drug carriers and magnetic resonance imaging, optical, electrochemical catalyst, optoelectronics and sensors etc.