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| 1 | High-precision RCS measurement of aircraft's weak scattering source显示文摘The radar cross section(RCS) of weak scattering source on the surface of an aircraft is usually less than 40 d Bsm.How to accurately measure the RCS characteristics of weak scattering source is a technical challenge for the aircraft's RCS measurement.This paper proposes separating and extracting the two-dimensional(2D) reflectivity distribution of the weak scattering source with the microwave imaging algorithm and spectral transform so as to enhance its measurement precision.Firstly,we performed the 2D microwave imaging of the target and then used the 2D gating function to separate and extract the reflectivity distribution of the weak scattering source.Secondly,we carried out the spectral transform of the reflectivity distribution and eventually obtained the RCS of the weak scattering source through calibration.The prototype experimental results and their analysis show that the measurement method is effective.The experiments on an aircraft's low-scattering conformal antenna verify that the measurement method can eliminate the clutter on the surface of aircraft.The precision of measuring a 40 d Bsm target is 3–5 d B better than the existing RCS measurement methods.The measurement method can more accurately obtain the weak scattering source's RCS characteristics. | Hu Chufeng Li Nanjing Chen Weijun Zhang Linxi | 2016 | Chinese Journal of Aeronautics2016，29，3： | 7 |
| 2 | STUDIES ON PATHOGENESIS OF WAARDENBURG SYNDROME TYPE Ⅱ AND TIETZ SYNDROME RESULTING FROM MITF GENE MUTATIONS显示文摘Microphthalmia-associated transcription factor(MITF) controls melanocyte survival and differentiation through directly regulating the expression of the tyrosinase(TYR) and tyrosinase- related proteins 1 and 2(TYRP1 and TYRP2) genes. MITF mutations have been reported to result in an abnormal melanocyte development and lead to Waardenburg syndrome type 2(WS2), characterized by variable degrees of sensorineural hearing loss and patchy regional distribution of hypopigmentation. Recently, MITF was also indicated as a causative gene for a more severe syndrome, the Tietz Syndrome(TS), characterized by generalized hypopigmentation and complete hearing loss. However, few functional studies have been performed to compare the diseases-causing mutations. Here, we analyzed the in vitro activity of two recent identified WS2-associated mutation(p.R217I and p.T192fsX18) and one TS-associated mutation p.N210K. The R217I MITF retained partial activity, normal DNA-binding ability and nuclear distribution, whereas the T192fsX18 MITF failed to activate TYR promoter due to loss of DNA-binding activity, and aberrant subcellular localization.The aberrant subcellular localization of T192fsX18 MITF may be caused by deletion of a putative nuclear localization signal(NLS) at aa 213-218(ERRRRF). Indeed, MITF with deletion of the NLS fragment failed to translocate into the nucleus and activated the TYR promoter. Tagging this NLS to GFP promoted the green fluorescence protein(GFP) translocated into the nucleus. The surprising finding of our study is that a TS-associated MITF mutation, N210K, showed comparable in vitro activity as WT. Thus, the possible involvement of MITF in TS and its underlying mechanisms still need further investigation. | ZHANG Hua LI Jiada LUO Hunjin CHEN Hongsheng MEI Lingyun HE Chufeng JIANG Lu FENG Yong | 2013 | Journal of Otology2013，8，2： | 2 |
| 3 | Novel mutations of PAX3, MITF, and SOX10 genes in Chinese patients with type I or type II Waardenburg syndrome显示文摘 | Hongsheng Chen Lu Jiang Zhiguo Xie Lingyun Mei Chufeng He Zhengmao Hu Kun Xia Yong Feng | 2010 | Biochemical and Biophysical Research Communications2010，，1： | 1 |
| 4 | Phthalimide and Naphthalimide end-Capped Diketopyrrolopyrrole for Organic Photovoltaic Applications显示文摘二个小分子作为终端作为中央强壮的领受人单位和 phthalimide/naphthalimide 与一个 DPP 核心说出 PI-DPP 和 NI-DPP 弱领受人被设计并且综合。热行为,光、电气化学的性质,以及这二材料的光电的表演上的终端 phthalimide/naphthalimide 单位的效果系统地被学习。周期的 voltammetry 表明两个分子的最低没有住的分子的 orbitals (LUMO )(^-3.6 eV ) 对普通电子施主(P3HT ) 和领受人(PCBM ) 中间。当与 PCBM 相配时,当与 P3HT 相配时,在在 DPP 和 PCBM 之间,以及在 P3HT 和 DPP 之间的足够的驱动力应该为激子分离被创造的地方,这显示 PI-DPP 和 NI-DPP 可以特别地用作电子施主,并且作为电子领受人。用作电子施主材料, PI-DPP 和 NI-DPP 设备由分别地与 PCBM 相配展出了 0.90% 和 0.76% 的低力量变换效率(PCE ) 。并且 NI-DPP 的潜力的初步的评估作为施主材料,和 P3HT 用 P3HT 作为电子领受人材料被执行: NI-DPP 设备显示出0.6%的 PCE ,与开的电路电压( V 0.7 V 的 OC ),短路电流密度( J 1.91 mAcm -2,和45%的一个fill 因素( FF )的 SC )。 | Ming Chen Chenchen Du Xiaolei Ren Maoheng Yi Jinduo Yi Chufeng Chen Feng Liu Minjie Li Changqi Ma Hongyu Wang | 2017 | Chinese Journal of Chemistry2017，35，9： | 1 |
| 5 | Nanomaterials with dual immunomodulatory functions for synergistic therapy of breast cancer brain metastases显示文摘A long-standing paucity of effective therapies results in the poor outcomes of triple-negative breast cancer brain metastases.Immunotherapy has made progress in the treatment of tumors,but limited by the non-immunogenicity of tumors and strong immunosuppressive environment,patients with TNBC brain metastases have not yet benefited from immunotherapy.Dual immunoregulatory strategies with enhanced immune activation and reversal of the immunosuppressive microenvironment provide new therapeutic options for patients.Here,we propose a cocktail-like therapeutic strategy of microenvironment regulation-chemotherapy-immune synergistic sensitization and construct reduction-sensitive immune microenvironment regulation nanomaterials(SIL@T).SIL@T modified with targeting peptide penetrates the BBB and is subsequently internalized into metastatic breast cancer cells,releasing silybin and oxaliplatin responsively in the cells.SIL@T preferentially accumulates at the metastatic site and can significantly prolong the survival period of model animals.Mechanistic studies have shown that SIL@T can effectively induce immunogenic cell death of metastatic cells,activate immune responses and increase infiltration of CD8+T cells.Meanwhile,the activation of STAT3 in the metastatic foci is attenuated and the immunosuppressive microenvironment is reversed.This study demonstrates that SIL@T with dual immunomodulatory functions provides a promising immune synergistic therapy strategy for breast cancer brain metastases. | Zhenhao Zhao Chufeng Li Yiwen Zhang Chao Li Yongchao Chu Xuwen Li Peixin Liu Hongyi Chen Yu Wang Boyu Su Qinjun Chen Tao Sun Chen Jiang | 2023 | Bioactive Materials2023，，9： | 0 |
| 6 | Stiffness-tuned and ROS-sensitive hydrogel incorporating complement C5a receptor antagonist modulates antibacterial activity of macrophages for periodontitis treatment显示文摘Periodontitis is admittedly a microbe-driven intractable infectious disease,in which Porphyromonas gingivalis(Pg)plays a keystone role.Pg can selectively impair the antimicrobial responses of periodontal resident macrophages including their phagocytic and bactericidal activity without interfering their proinflammatory activity,which leads to microflora disturbance,destructive periodontal inflammation and alveolar bone loss eventually.Here,an injectable ROS-sensitive hydrogel is developed for releasing active bone marrow-derived macrophages(named ex-situ macrophages hereafter)and a complement C5a receptor antagonist(C5A)to the gingival crevice.Through appropriately tuning the hydrogel stiffness,the phagocytic activity of these macrophages is greatly enhanced,reaching an optimal performance at the elastic modulus of 106 kPa.Meanwhile,C5A avoids undesired C5a receptor activation by Pg to ensure the bacterial killing activity of both the ex-situ and in-situ macrophages.Besides,the ROS-sensitive hydrogels show another distinct feature of decreasing the ROS level in periodontal niche,which contributes to the alleviated periodontal inflammation and attenuated bone loss as well.This study highlights the potential of utilizing hydrogels with tailored biomechanical properties to remodel the functions of therapeutic cells,which is expected to find wide applications even beyond periodontitis treatment. | Ziqi Gan Zecong Xiao Zhen Zhang Yang Li Chao Liu Xin Chen Yuanbo Liu Dongle Wu Chufeng Liu Xintao Shuai Yang Cao | 2023 | Bioactive Materials2023，，7： | 0 |
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