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Effect of the reaction temperature on nanocrystallites MgAl2O4 spinel ceramic precursor
Rong-tao Wang,Ying Peng,Xiao-wei Fan,Jian-xin Li,Xiao-ping Liang 한양대학교 세라믹연구소 2009 Journal of Ceramic Processing Research Vol.10 No.6
Mg-Al hydrotalcite (Mg6Al2(OH)16CO3·4H2O), the precursor of MgAl2O4 spinel, has been synthesized via a coprecipitation method, using AlCl3·6H2O and MgCl2·6H2O as the raw materials, and NaOH and Na2CO3 as the precipitators. The effect of the reaction temperature, from 50℃ to 90℃, on the Mg-Al hydrotalcite nanocrystallites was analyzed. The nanocrystallites were studied by X-ray diffraction (XRD), scanning electron microscopy (SEM) and transmission electron microscopy (TEM). It was confirmed that Mg-Al hydrotalcite nanocrystallites are pure and regularly hexagonal, having a typical hydrotalcite structure. The Mg-Al hydrotalcite crystals grow from about 30 nm to 100 nm with an increase in the reaction temperature from 50℃ to 90 ℃, and the crystal form also tends to perfect and regularly hexagonal. Mg-Al hydrotalcite (Mg6Al2(OH)16CO3·4H2O), the precursor of MgAl2O4 spinel, has been synthesized via a coprecipitation method, using AlCl3·6H2O and MgCl2·6H2O as the raw materials, and NaOH and Na2CO3 as the precipitators. The effect of the reaction temperature, from 50℃ to 90℃, on the Mg-Al hydrotalcite nanocrystallites was analyzed. The nanocrystallites were studied by X-ray diffraction (XRD), scanning electron microscopy (SEM) and transmission electron microscopy (TEM). It was confirmed that Mg-Al hydrotalcite nanocrystallites are pure and regularly hexagonal, having a typical hydrotalcite structure. The Mg-Al hydrotalcite crystals grow from about 30 nm to 100 nm with an increase in the reaction temperature from 50℃ to 90 ℃, and the crystal form also tends to perfect and regularly hexagonal.
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Rong Jiang,Jianqing Zhu,김재원,Jihong Liu,Kazuyoshi Kato,김희승,Yuqin Zhang,Ping Zhang,Tao Zhu,Daisuke Aoki,Aijun Yu,Xiaojun Chen,Xipeng Wang,Ding Zhu,Wei Zhang,Huixun Jia,Ting-Yan Shi,Wen Gao,Sheng Yin,Yan 대한부인종양학회 2020 Journal of Gynecologic Oncology Vol.31 No.5
Background: Two randomized phase III trials (EORTC55971 and CHORUS) showed similarprogression-free and overall survival in primary or interval debulking surgery in ovariancancer, however both studies had limitations with lower rate of complete resection and lack ofsurgical qualifications for participating centers. There is no consensus on whether neoadjuvantchemotherapy followed by interval debulking surgery (NACT-IDS) could be a preferred approachin the management of advanced epithelial ovarian cancer (EOC) in the clinical practice. Methods: The Asian SUNNY study is an open-label, multicenter, randomized controlled,phase III trial to compare the effect of primary debulking surgery (PDS) to NACT-IDS instages IIIC and IV EOC, fallopian tube cancer (FTC) or primary peritoneal carcinoma (PPC). The hypothesis is that PDS enhances the survivorship when compared with NACT-IDS inadvanced ovarian cancer. The primary objective is to clarify the role of PDS and NACT-IDS inthe treatment of advanced ovarian cancer. Surgical quality assures include at least 50% of nogross residual (NGR) in PDS group in all centers and participating centers should be nationalcancer centers or designed ovarian cancer section or those with the experience participatingsurgical trials of ovarian cancer. Any participating center should be monitored evaluatingthe proportions of NGR by a training set. The aim of the surgery in both arms is maximalcytoreduction. Tumor burden of the disease is evaluated by diagnostic laparoscopy orpositron emission tomography/computed tomography scan. Patients assigned to PDS groupwill undergo upfront maximal cytoreductive surgery within 3 weeks after biopsy, followed by6 cycles of standard adjuvant chemotherapy. Patients assigned to NACT group will undergo 3cycles of NACT-IDS, and subsequently 3 cycles of adjuvant chemotherapy. The maximal timeinterval between IDS and the initiation of adjuvant chemotherapy is 8 weeks. Major inclusioncriteria are pathologic confirmed stage IIIC and IV EOC, FTC or PPC; ECOG performancestatus of 0 to 2; ASA score of 1 to 2. Major exclusion criteria are non-epithelial tumors as wellas borderline tumors; low-grade carcinoma; mucinous ovarian cancer. The sample size is 456subjects. Primary endpoint is overall survival. Trial Registration: ClinicalTrials.gov Identifier: NCT02859038
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Rong He Gao,Feng Li,Wen Tao Niu,Peng Da Huo 대한금속·재료학회 2023 METALS AND MATERIALS International Vol.29 No.7
The long manufacturing process, difficult coordinated regulation of structural properties and interface bonding ability aresome of the difficulties that restrict the rapid development of lightweight composite plate forming and manufacturing for along time. In order to solve the above problems, this paper proposes adding hard plate to roll Al/Mg/Al composite plates. The thickness of Mg/Al is 10:1, and the hard-plate rolling process experiments were carried out by designing five groupsof different temperatures. The influence of magnesium plate microstructure evolution on the interface bonding ability andmechanical behavior of composite plates is mainly studied. Under the same conditions, the matrix microstructure changesgreatly from 200 to 350 °C. At 350 °C, the microstructure of Mg plate in ND is uniform without shear bands and twins. Itsrecrystallization ratio is 31.77%, which played a role in weakening the texture and reducing its anisotropy. Interestingly,in the process of three-point bending, the non-basal plane slip and the basal plane slip start simultaneously, the maximumbending strength of the composite plate reaches 504 MPa, and the interface was well bonded without obvious bending fatiguephenomenon. The tear test showed that the tear load reaches 0.42 kN, and the elastic elongation stage of Al is longer than thetear propagation stage, and the interface bonding was uniform. The hard plate rolling process provides scientific guidancefor the forming and preparation of composite plates.
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Kinetic and thermodynamic study of Eu(III) sorption on natural red earth in South China
Tao Yu,Wang-Suo Wu,Zhi-Rong Liu,Si-Wei Zhang,Zheng-Wei Nie 한국화학공학회 2013 Korean Journal of Chemical Engineering Vol.30 No.2
We did a kinetic and thermodynamic study of Eu(III) sorption on natural red earth (NRE) in South China as a function of contact time, pH values, ionic strength, humic acid (HA) and temperature under ambient conditions. Linear and nonlinear regression methods in selecting the optimum sorption isotherm were applied on the experimental data. The results suggest that sorption of Eu(III) on NRE can be described by a pseudo-second-order rate equation and strongly dependent on ionic strength at pH<7. Sorption of Eu(III) on NRE increased with increasing temperature,two-parameter and three-parameter isotherms were applied to analysis the equilibrium adsorption data, and a comparison of linear and nonlinear regression methods was done. The thermodynamic parameters (ΔH0, ΔS0 and ΔG0) of Eu(III)sorption on NRE at different temperatures were calculated from the temperature-dependent sorption isotherms, indicating that the sorption process of Eu(III) was spontaneous. The results showed that the nonlinear method is a better way to obtain the isotherm parameters and the data were in good agreement with the Freundlich isotherm model.
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Rong Wang,Tao Zuo 한국해양과학기술원 2004 Ocean science journal Vol.39 No.1
The Yellow Sea Warm Current (YSWC) and the Yellow Sea Cold Bottom Water (YSCBW) are two protruding features, which have strong influence on the community structure and distribution of zooplankton in the Yellow Sea. Both of them are seasonal phenomena. In winter, strong north wind drives southward flow at the surface along both Chinese and Korean coasts, which is compensated by a northward flow along the Yellow Sea Trough. That is the YSWC. It advects warmer and saltier water from the East China Sea into the southern Yellow Sea and changes the zooplankton community structure greatly in winter. During a cruise after onset of the winter monsoon in November 2001 in the southern Yellow Sea, 71 zooplankton species were identified, among which 39 species were tropical, accounting for 54.9 %, much more than those found in summer. Many of them were typical for Kuroshio water, e.g. Eucalanus subtenuis, Rhincalanus cornutus, Pareuchaeta russelli, Lucicutia flavicornis, and Euphausia diomedeae etc. 26 species were warm-temperate accounting for 36.6% and 6 temperate 8.5%. The distribution pattern of the warm water species clearly showed the impact of the YSWC and demonstrated that the intrusion of warmer and saltier water happened beneath the surface northwards along the Yellow Sea Trough. The YSCBW is a bottom pool of the remnant Yellow Sea Winter Water resulting from summer stratification and occupy most of the deep area of the Yellow Sea. The temperature of YSCBW temperature remains ≤10oC in mid-summer. It is served as an oversummering site for many temperate species, like Calanus sinicus and Euphaisia pacifica. Calanus sinicus is a dominant copepod in the Yellow Sea and East China Sea and can be found throughout the year with the year maximum in May to June. In summer it disappears in the coastal area and in the upper layer of central area due to the high temperature and shrinks its distribution into YSCBW.
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Photothermal Therapy of Copper Incorporated Nanomaterials for Biomedicine
Rong Wang,Ziwei Huang,Yunxiao Xiao,Tao Huang,Jie Ming 한국생체재료학회 2023 생체재료학회지 Vol.27 No.00
Studies have reported on the significance of copper incorporated nanomaterials (CINMs) in cancer theranostics and tissue regeneration. Given their unique physicochemical properties and tunable nanostructures, CINMs are used in photothermal therapy (PTT) and photothermal-derived combination therapies. They have the potential to overcome the challenges of unsatisfactory efficacy of conventional therapies in an efficient and non-invasive manner. This review summarizes the recent advances in CINMs-based PTT in biomedicine. First, the classification and structure of CINMs are introduced. CINMs-based PTT combination therapy in tumors and PTT guided by multiple imaging modalities are then reviewed. Various representative designs of CINMs-based PTT in bone, skin and other organs are presented. Furthermore, the biosafety of CINMs is discussed. Finally, this analysis delves into the current challenges that researchers face and offers an optimistic outlook on the prospects of clinical translational research in this field. This review aims at elucidating on the applications of CINMs-based PTT and derived combination therapies in biomedicine to encourage future design and clinical translation.
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( Rong Han ),( Jin-wen Liu ),( Hong-tao Wang ),( Yuan-cheng Zhang ) 한국폐기물자원순환학회 2011 ISWA Vol.2011 No.0
Pyrolysis of municipal sewage sludge (MSS) is a promising thermal conversion technology for waste disposal and energy recycle. The product yield pattern of thermal degradation process is strongly relevant to the chemical composition of MSS. In the present study, MSS was firstly processed in a biophysical conversion reactor to adjust the moisture content and biomass fraction. The pyrolysis characteristics of products from biophysical pre-treatment were investigated using thermogravimetric analysis(TGA) and differential scanning calorimetry(DSC), with the materials decomposing between 30℃ to 900℃ at heating rates of 10, 20, 40 ℃/min. According to DTG curves, the kinetic model was performed according to a combination of five-step decomposition. The approximate composition of samples can be determined by each step due to its pyrolysis feature. The nth-order kinetic equations was utilized to describe component degradations and the apparent activation energies were calculated at 25.46, 14.48, 48.15, 85.22, 60.16 kJ/mol through Coats-Redfern integral method. The first-step decomposition was related to low stability organic compounds that derived from the intermediate products of metabolism. The other four steps are mostly ascribed to the non-biodegradable components. The product gas was detected on-line by mass spectrograph (MS) coupled with TGA, indicating the thermal degradation characteristics of various components in the pre-treated sample.
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Tao Huang,Ya‑dong Wang,Ming‑ming Xue,Xue Feng,Cai‑Xia Sun,An‑si Wang,Shu‑yu Xie,Meng Zhang,Gui‑Rong Sun,Ming Li 한국유전학회 2018 Genes & Genomics Vol.40 No.7
Reproduction is a complex physiological process that is regulated by multiple genes and pathways. Compared with studies of common livestock, fewer studies of genes related to the fertility of rabbits (Oryctolagus cuniculus) have been reported, and the molecular mechanism of their high productivity is still poorly understood. To identify candidate genes associated with development and prolificacy in rabbits, we analyzed gene expression differences among the ovaries of mature Californian rabbit (LC), and mature (HH) and immature Harbin white rabbit (IH) using digital gene expression technology. We detected 885 and 321 genes that were significantly differentially expressed in comparisons between HH/IH and HH/LC, respectively. The functions of the differentially expressed genes (DEGs) were determined by GO classification and KEGG pathway analysis. The results suggest that most of the DEGs between the mature and immature developmental stages were predominantly associated with DNA replication, cell cycle, and progesterone-mediated oocyte maturation, and most were up-regulated in the IH group compared with the HH group. The DEGs involved in disparate fecundities between HH and LC were associated with reproduction, fructose and mannose metabolism, steroid hormone biosynthesis, and pyruvate metabolism. Our results will contribute to a better understanding of changes in the regulatory network in ovary at different developmental stages and in different fertility of rabbit.
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