http://chineseinput.net/에서 pinyin(병음)방식으로 중국어를 변환할 수 있습니다.
변환된 중국어를 복사하여 사용하시면 됩니다.
Minjia Lu,Pingping Jiang,Pingbo Zhang,Shan Feng,Zhixuan Cui,Qingkui Song,Yong Zhao,Jingxian Shen,Yiyi Fan,Huixian Lu 한국공업화학회 2023 Journal of Industrial and Engineering Chemistry Vol.128 No.-
A novel multifunctional plasticizer, cyclohexyl triethylene glycol oligo-lactate (CTLE) was designed by atwo-step esterification reaction using green non-toxic biomass lactic acid as raw material. Its structurewas characterized by 1H NMR, FT-IR and TOF-MS. Thermogravimetric analysis (TGA), tensile test andleaching test were used to evaluate the plasticizer effect of PVC or PLA blends. Compared with commercialplasticizers, CTLE showed more outstanding thermal stability, flexibility and migration stability. Under the same condition with the addition of 50 phr plasticizer, the CTLE plasticized PVC film hadthe lowest glass transition temperature (TgCTLE-50 = 24.6 C) and the highest initial decomposition temperature(TiCTLE-50 = 265.4 C). In PLA blends, only the CTLE plasticized PLA film could recover after fracture,and the stress relaxation test results showed that the stress value of PLA-CTLE-20 drops sharply to anon-zero value, showing elastic characteristics. We estimate that the excellent plasticity of CTLE is due toits molecular structure. Among them, a large number of polar groups form intermolecular forces withPVC chain segments to make the binding tight, and the ring structure increases the free volume betweenPVC chain segments.
Minjia Meng,Yonghai Feng,Weisheng Guan,Yan Liu,Yanfang Xi,Yongsheng Yan 한국공업화학회 2014 Journal of Industrial and Engineering Chemistry Vol.20 No.6
Highly effective molecularly imprinted nano-polymer on wollastonite (nano-WMIP) was prepared byimprinting technique using oil-in-water emulsion polymerization in the presence of salicylic acid (SA) astemplate. The adsorption behavior of nano-WMIP including adsorption kinetic, isotherms, selectiveadsorption, recognition, and effects of initial pH, ionic strength, initial concentration, adsorptiontemperature, and amount of adsorbents were investigated in detail. Moreover, the selective recognitionof nano-WMIP was further investigated by HPLC toward analogs of SA. The relative selectivitycoefficients for p-HB, MS, and MP were 113.4, 8.049, and 6.239, respectively, showing that much higherselectivity of SA on nano-WMIP was obtained than that of wollastonite-based non-imprinted polymer(nano-WNIP).
Mehmet ¨ Ozen,Minjia Shi,Vedat S¸iap 대한수학회 2015 대한수학회보 Vol.52 No.3
This paper is devoted to presenting a MacWilliams type identity for m-spotty RT weight enumerators of byte error control codes over finite commutative Frobenius rings, which can be used to determine the error-detecting and error-correcting capabilities of a code. This provides the relation between the m-spotty RT weight enumerator of the code and that of the dual code. We conclude the paper by giving three illustrations of the results.
Yanhua Cui,Minjia Meng,Dongshu Sun,Yan Liu,Jianming Pan,Xiaohui Dai,Yongsheng Yan 한국화학공학회 2017 Korean Journal of Chemical Engineering Vol.34 No.3
We developed a simple phase inversion technique to prepare molecularly imprinted membrane (MIM) at room temperature for membrane selective adsorption and separation of methyl p-hydroxybenzoate (M4HB). The prepared SMIP-MIM was characterized by SEM, FT-IR, TGA. Compared with non-imprinted membrane (NIM1-5) adsorbent, SMIP-MIM1-5 adsorbent with high specific surface area and showed higher binding capacity, faster kinetic and better selectively adsorption capacity for M4HB. The maximum isotherm adsorption capacity for M4HB of SMIPMIM4 was 3.519mg·g−1, and the experimental data was well fitted to the slips model by multiple analysis. The maximum kinetic adsorption capacity and equilibrium adsorption time for SMIP-MIM4 were 1.335mg·g−1 and 160 min, respectively. The mechanism for dynamic adsorption of M4HB onto SMIP-MIM4 was found to follow pseudo-firstorder model and pseudo-second-order model. Additionally, the permeability separation factor of SMIP-MIM4 for M4HB compared to a structural analogues methyl 2-hydroxybenzoate (M2HB) could reach 2.847. The adsorption capacity of SMIP-MIM4 for M4HB and M2HB was 0.549mg·cm−2 and 1.563mg·cm−2, respectively. The adsorption behavior of M4HB through SMIP-MIM4 followed the retarded permeation mechanism.
Ozen, Mehmet,Shi, Minjia,Siap, Vedat Korean Mathematical Society 2015 대한수학회보 Vol.52 No.3
This paper is devoted to presenting a MacWilliams type identity for m-spotty RT weight enumerators of byte error control codes over finite commutative Frobenius rings, which can be used to determine the error-detecting and error-correcting capabilities of a code. This provides the relation between the m-spotty RT weight enumerator of the code and that of the dual code. We conclude the paper by giving three illustrations of the results.
Yunlei Zhang,Pei Jin,Minjia Meng,Lin Gao,Meng Liu,Yongsheng Yan 성균관대학교(자연과학캠퍼스) 성균나노과학기술원 2018 NANO Vol.13 No.11
The direct synthesis of metal-organic frameworks (MOFs) with acidic and basic active sites is challenging due to the introduction of functional groups by post-functionalization method often jeopardize the framework integrity. Herein, we report the direct synthesis of acid-base bi-functional MOFs with tuning acid-base strength. Employing modulated hydrothermal (MHT) approach, microporous MOFs named UiO-66-NH2 was prepared. Through the ring-opening reaction of 1,3-propanesultone with amino group, UiO-66-NH2-SO3H-type catalysts can be obtained. The synthesized catalysts were well characterized and their catalytic performances were evaluated in one-pot glucose to 5-HMF conversion. Results revealed the acid-base bi-functional catalyst possessed high activity and excellent stability. This work provides a general and economically viable approach for the large-scale synthesis of acid-base bi-functional MOFs for their potential use in catalysis field.
MS/MS of Synthetic Peptide Is Not Sufficient to Confirm New Types of Protein Modifications
Lee, Sangkyu,Tan, Minjia,Dai, Lunzhi,Kwon, Oh Kwang,Yang, Jeong Soo,Zhao, Yingming,Chen, Yue American Chemical Society 2013 JOURNAL OF PROTEOME RESEARCH Vol.12 No.2
<P>Protein post-translational modification (PTM) is one of the major regulatory mechanisms that fine-tune protein functions. Undescribed mass shifts, which may suggest novel types of PTMs, continue to be discovered because of the availabilities of more sensitive mass spectrometry technologies and more powerful sequence alignment algorithms. In this study, the histone extracted from HeLa cells was analyzed using an approach that takes advantages of in vitro propionylation, efficient peptide separation using isoelectric focusing fractionation, and the high sensitivity of the linear ion trap coupled with hybrid FT mass spectrometer. One modified peptide was identified with a new type of protein modification (+42 Da), which was assigned to acetylation of threonine 15 in histone2A. The modified peptide was verified by careful manual evaluation of the tandem mass spectrum and confirmed by high-resolution MS/MS analysis of the corresponding synthetic peptide. However, HPLC coelution and MS/MS/MS of key ions showed that the +42 Da mass shifts at threonine residue did not correspond to acetylation. The key fragment ion, y4, in the MS/MS/MS spectra (indicative of the modification site) differed between the in vivo and synthetic peptide. We showed that the misidentification was originated from sequence homologues and chemical derivitization during sample preparation. This result indicated that a more stringent procedure that includes MS/MS, MS/MS/MS, and HPLC coelution of synthetic peptides is required to identify a new PTM.</P><P><B>Graphic Abstract</B> <IMG SRC='http://pubs.acs.org/appl/literatum/publisher/achs/journals/content/jprobs/2013/jprobs.2013.12.issue-2/pr300667e/production/images/medium/pr-2012-00667e_0005.gif'></P><P><A href='http://pubs.acs.org/doi/suppl/10.1021/pr300667e'>ACS Electronic Supporting Info</A></P>
Yanhua Cui,Lili Yang,Minjia Meng,Qi Zhang,Binrong Li,Yilin Wu,Yunlei Zhang,Jihui Lang,Chunxiang Li 한국화학공학회 2019 Korean Journal of Chemical Engineering Vol.36 No.2
A simplified strategy for facilely fabricating antifouling graphite carbon nitride/silver phosphate (g-C3N4/ Ag3PO4) nanocomposite photocatalytic polyvinylidene fluoride (PVDF) porous membranes was developed for effective removal of rhodamine B (RhB). g-C3N4/Ag3PO4 heterojunction was strongly fixed to the interior of the PVDF membranes via phase inversion method. The membrane structure was analyzed by Fourier transform spectrophotometer (FT-IR). The morphology of the prepared membranes was investigated using scanning electron microscopy (SEM), EDX-mapping and atomic force microscopy (AFM), respectively. All prepared nanocomposite photocatalytic PVDF membranes exhibited a typically porous structure, and g-C3N4/Ag3PO4 nanocomposites were well dispersed inside the membranes. The obtained g-C3N4/Ag3PO4 heterojunction nanoparticle decorated PVDF membrane had a lower water contact angle of 79o and higher porosity of 85% than that of other two control membranes. The nanocomposite photocatalytic PVDF porous membranes had extremely high permeation flux over 1,083 L·m−2·h−1, and could be used for the removal of RhB. The removal efficiency of g-C3N4/Ag3PO4-PVDF membranes towards RhB solution under visible light irradiation reached 97%, higher than that of the pure PVDF membranes (41%) and g-C3N4-PVDF membranes (85%). Remarkably, the flux performance and flux recovery ratio (FRR) of membranes revealed that the g-C3N4/Ag3PO4- PVDF membranes could recover high flux after fouling, which presented better fouling resistance. Furthermore, the fabricated antifouling g-C3N4/Ag3PO4 nanocomposite photocatalytic PVDF porous membranes exhibited excellent recyclability. Therefore, it is expected that g-C3N4/Ag3PO4-PVDF membranes could provide an energy-saving strategy for effective removal of organic dyes wastewater and have a great potential for practical wastewater treatment in the future.
Directed strongly regular graphs and their codes
Adel Alahmadi,Ahmad Alkenani,김종락,Minjia Shi,Patrick Sole 대한수학회 2017 대한수학회보 Vol.54 No.2
The rank over a finite field of the adjacency matrix of a directed strongly regular graph is studied, with some applications to the construction of linear codes. Three techniques are used: code orthogonality, adjacency matrix determinant, and adjacency matrix spectrum.
Global Histidine Phosphoproteomics in Human Prostate Cancer Cells
( Yan Gao ),( Doeun Kim ),( Eunji Sung ),( Minjia Tan ),( Tae Gyun Kwon ),( Jun Nyung Lee ),( Sangkyu Lee ) 한국질량분석학회 2020 Mass spectrometry letters Vol.11 No.3
Histidine phosphorylation (pHis) is increasingly recognized as an important post translational modification (PTM) in regulating cellular functions in eukaryotes. In order to clarify the role of pHis in mammalian cell signaling system, a global phosphorylation study was performed in human prostate cancer cells, PC-3M, using a TiO<sub>2</sub> affinity chromatography. A total number of 307 pHis sites were identified on the 268 proteins among total identified 9,924 phosphorylation sites on 3,316 proteins. In addition, 22 pHis proteins were classified in enzyme category. This report provides the first database for the study of pHis in prostate cancer cells.