“三化”结合,创新家装业务模式

南阳市业之峰装饰有限公司(简称南阳业之峰)通过“三化”结合,创新家装业务管理模式,不断提升施工队伍素质和工程质量,先后获得“中国建筑装饰质量服务双优企业”“河南省优秀装饰企业”“河南省十佳绿色环保装饰企业”“南阳市十佳家装公司”等多项殊荣。

创新型人才培养体系研究与实践

本文通过对创新型人才培养的探索与实践,论述了大学生创新体系的构建,包括创新型人才培养的指导思想,创新实验室软硬件环境建设,系统化的实验内容,因材施教的教学方法,以提高学生综合素质为目的的管理制度,并介绍了在这种大学生创新体系下产生的创新成果。

Ternary compounds and solid-state phase equilibria in Mg-rich side of Mg-Zn-Ca system at 300 ℃

The phase equilibria and compositions in Mg-rich side at 300 ℃ were investigated in Mg-Zn-Ca ternary system through the equilibrated alloy method by using scanning electron microscopy,electron probe microanalysis,X-ray diffraction and transmission electron microscopy.The results show that two ternary compounds T1 and T2 can be in equilibrium with the Mg-based solid solution in Mg-Zn-Ca system.T1 phase is a linear compound with the composition region（molar fraction） of 15% Ca,20.5%-48.9% Zn and balanced Mg at 300 ℃.Its hexagonal structure parameters decrease with increasing Zn content,i.e.a=0.992-0.945 nm,c=1.034-1.003 nm.T2 phase has hexagonal structure with the composition region of 26.4%-28.4% Mg,63.2%-65.5% Zn and 7.1%-8.4% Ca.At 300 ℃,the solubility of Zn in the Mg-based solid solution increases for the addition of Ca,the maximum solubility of Zn is 3.7%.Three-phase fields consisting of--Mg＋Mg2Ca＋T1,--Mg＋T1＋T2,--Mg＋T2＋MgZn and MgZn＋T2＋Mg2Zn3 exist in the Mg-Zn-Ca system at 300 ℃.

Cu(Ⅱ),Ni(Ⅱ)Complexation with Acid Alizarine Blue B in the Presence of Cetyltrimethylammonium Bromide

The coordination reactions of Cu（Ⅱ） and Ni（Ⅱ） with acid alizarine blue B （AABB） in the presence of cetyltrimethylammonium bromide （CTAB） micelle were investigated using the microsurface adsorptionspectral correction technique （MSASC）. The aggregation of AABB on CTAB followed the Langmuir isothermal adsorption law. The enrichment of AABB on CTAB sensitized the complexation between Cu（Ⅱ） or Ni（Ⅱ）and AABB. The binding ratio of AABB to CTAB was 1：2.5, and monomeric aggregate, AABB2CTAB5, was formed with an adsorption constant of 5.95×10^5 at 20 ℃ or 2.48×10^5 at 40 ℃. In the ternary complexation, the ratio of AABB：Cu and AABB：Ni were 1：1 and 1：2.5, respectively. Two types of aggregates, Cu2.AABB2·CTAB80 and Ni5.AABB2.CTAB80, were formed.

A Review of Triterpenoids and Their Pharmacological Activities from Genus Kadsura

Plants in genus Kadsura,belong to the Schisandraceae family including genus Schisandra and genus Kadsura,revealed folk efficacy and medicinal application in the treatment of rheumatoid arthritis and gastroenteric disorders for a long history.Previous study indicated that plants from genus Kadsura mainly contain lignans,triterpenoids and essential oils,and showed the active compounds were lignans and triterpenoids.Among all compounds from Schisandraceae family,the triterpenoids between the genus Schisandra and genus Kadsura had obvious differences.In this paper,we reviewed214triterpenoids and their pharmacological activities reported from genus Kadsura in the past30years(from1987to2017),aiming to provide reference for further study.

Extraction and Crystal Structure of Karounidiol

The title compound of karounidiol (C30H48O2), a main active triterpene component of snakegourd seed, was isolated from unsaponifiable matter of the seed oil of Trichosanthes kirilowii Maxim., and characterized by X-ray diffraction analysis. It crystallizes in orthorhombic system, space group P212121 with C30H48O2CH3OHH2O (C31H54O4), a = 7.515(1), b = 14.407(1), c = 27.799(2) , V = 3009.8(5) 3, Z = 4, Dx = 1.087 g/cm3, Mr = 490.77, F(000) = 1088 and = 0.086 mm-1. The final R = 0.0840 and wR = 0.2289 for 2752 observed reflections (|F|2 ≥ 2|F|2). The molecular crystal structure of karounidiol shows relative stereochemistry of (3,13,14, 20)-3,29-dihydroxy-13-methyl-26-norolean-7,9(11)-diene. The molecule is composed of five six- membered rings with ring junctures of A/B trans, C/D trans and D/E cis.

About New Inorganic Polymers-Double Condensed Phosphates of Silver and Trivalent Metals

A distinctive feature of phosphates is their special and significant ability to form inorganic polymeric compounds---condensed phosphates, which are destined to play a considerable role in our ＂high-tech＂ society in the future. Numerous olygophosphates, polyphosphates, double condensed phosphates and cyclophosphates with diverse formula, such as double tetra-, octa- and dodecaphosphates were obtained and described by us last years. The offered data are the outcomes of our scientific researches： of synthesis, analysis, and estimation of results in correlation with new achievements in inorganic polymer＇s chemistry. Many double condensed compounds, containing monovalent metals are obtained by us during systematic investigation of polycomponent systems, containing mono- and trivalent metals at temperature range 100-600 ~C. Synthesised condensed phosphates, in fact--inorganic polymers were examined in detail by chemical and thermogravimetric analysis, most compounds were examined by paper chromatography and the structures are determined by X-ray structural techniques/diffraction analysis. During our fundamental researches numerous new （about 70） unknown until now condensed phosphates have been obtained. Dependency of composition VS temperature and molar ratio, reliance of structure from duration of synthesis and radius of the ions are revealed.

Research on Optimization wharf Structure Type of Triangle frame pier

Based on optimization wharf structure type of triangle flame pier proposed, namely＂ Spatial triangular flame pier ＋ Big span bent which taking Slant supports＂ Simulating three-dimensional pier model of a variety of conditions in the actual loading by structural finite element software. Under the guidance of the three-dimensional structure of the most unfavorable load combination algorithm, three-dimensional combination algorithm is applied to the new structure by the MATLAB software programming. Search and calculate the most unfavorable combination of action effects and the corresponding intemal force of the main member, checking the feasibility of the three-dimensional algorithms, Calculating the new wharf structure structural features and stability, Providing numerical reference for the design of this sort of wharf.

Synthesis and Crystal Structure ofTrichlorotetrakis(tetrahydrofuran) Europium

Crystal of EuCl3(C4H8O4). was obtained from the reaction of C9H7Naand EuCl3,(0. 8: 1 mole ratio) in THF. It was crystallized in Fdd2 space group withunit cell parameters a=29. 161 (4), b=16. 558(6), c=9. 479 (3) A, V=4577 (4)A3, Z=8, Dc= 1.59 g/cm3, Mr=546. 75. F(000)=2192, A(Mo Ka) =0. 71069, u=31. 12 cm-1, T=293K. The final R and Rw values are 0. 040 and 0. 051 respective-ly. Three chlorine atoms and four oxygen atoms from THF are coordinated with cen-tral europium ion to form a pentagonal bipyramid polyhedron with coordination number7, the average Eu-Cl; bond length is 2. 637 A and Eu-O 2. 460A.

A lignin glycoside and a nortriterpenoid from Kadsura coccinea

AIM: To study the chemical constituents of the roots and stem bark of Kadsura coccinea. METHOD: Compounds were isolated by column chromatography on silica gel and Sephadex LH-20, and finally purified by prep-HPLC. Their structures were elucidated by extensive spectroscopic methods, including 1D- and 2D-NMR, and HR-ESI-MS. RESULTS: Two compounds were determined as(7′S,8′S,8R)-(8β,8′α)- dimethyl-4,4′-dihydroxy-5,3′-dimethoxy-5′-cyclolignan glucoside(1) and micrandiactone H(2), respectively. CONCLUSION: Compunds 1 and 2 are new and neither showed inhibitory effects on nitric oxide(NO) production in lipopolysaccharide-induced RAW264.7 macrophages.

Chemical constituents from Trichosanthes cucumeroides

One new triterpenoid, 3β-[(E)-caffeoyloxy]-D:C-friedooleana-7,9(11)-dien-29-oic acid(1) and nine known triterpenoids identified as cucurbitacin B(2), 23,24-dihydrocucurbitacin B(3), 23,24-dihydrocu-curbitacin D(4), cucurbitacin D(5), cucurbalsaminol A(6), 3-epi-isocucurbitacin D(7), curbitacin G(8), cucurbitacin J(9) and cucurbitacin I(10) were purified from Trichosanthes cucumeroides. Their structures were confirmed by spectroscopic data analysis and comparison with previous literature. All compounds were obtained from T. cucumeroides for the first time.

Three dimensional microstructures and wear resistance of Al-Bi immiscible alloys with different grain refiners

The three dimensional(3D) microstructures of Al-Bi alloys with different grain refiners(Al-5Ti-B, Al-3B and Al-3Ti) have been studied using synchrotron X-ray microtomography. The relationships between the microstructures and the corresponding wear behavior are verified through the friction and wear tests. The worn surfaces of the samples with grain refiners tested under 15 and 60 N loads are analyzed using Scanning Electron Microscopy(SEM). The results indicate that the addition of grain refiners is beneficial to the size and distribution of the Bi-rich particles in Al-Bi alloys. Compared with Al-5Ti-B and Al-3B grain refiners, the Bi-rich particles are more uniformly distributed and spherical with finer size with the addition of Al-3Ti grain refiner. The refinement renders the Al-20wt%Bi alloy refined by Al-3Ti the superior wear resistance with respect to those refined by Al-5Ti-B and Al-3B grain refiners, corresponding to the microstructures with fine and uniformly distributed Bi-rich particles in the Al matrix.

One-dimensional iron oxides nanostructures

Iron oxides, including α-Fe2O3, γ-Fe2O3, Fe3O4, etc. are one of the most widely investigated materials for their fundamental properties and potential applications. One-dimensional （1-D） iron oxides nanostructures are the focus of recent research activi- ties because of their wide applications in magnetic refrigeration, information storage, electronics, catalysts, Li-ion battery, pigment, gas sensors, etc. This review covers the recent progress in the synthesis, properties and applications of 1-D iron oxides nanostructures. The paper begins with the introduction to 1-D iron oxides nanostructures, followed by the typical synthetic methods developed for the synthesis of 1-D iron oxides nanostructures. Then, the typical 1-D iron oxides nanostructures, in- cluding nanowires/nanorods, nanotubes, nanobelts, nanochalns, and special 3-D structures built on 1-D building blocks, are introduced in detail. The properties of 1-D iron oxides nanostructures are then discussed, focusing on the magnetic, gas sensing, and electrochemical and photocatalytic properties. Finally, we draw conclusions and look at the prospects of 1-D iron oxides nanostructures.

Intra-corporeal delta-shaped anastomosis in laparoscopic right hemicolectomy for right colon cancer:a safe and effective technique

Background and objective:Intra-corporeal delta-shaped anastomosis(IDA)is an important development in laparoscopic digestive-tract reconstruction.We applied it in laparoscopic right hemicolectomy for right colon cancer and compared the short-term outcomes between the patients treated with IDA and conventional extracorporeal anastomosis(EA).Methods:Between 1 January 2016 and 1 October 2017,36 and 50 patients who underwent IDA and EA,respectively,were included.Data on clinicopathological characteristics,surgical outcomes,post-operative recovery and complications were collected and compared between the two groups.Results:Surgical outcomes and clinicopathological characteristics were similar between the two groups except the length of incision,which was significantly shorter in the IDA group than in the EA group(4.660.6 vs 5.660.7 cm,P<0.001).The time to ground activities,fluid diet intake and post-operative hospitalization did not differ between the groups;however,the time to first flatus was significantly shorter in the IDA group than in the EA group(2.860.5 vs 3.260.8 days,P=0.004).The post-operative visual analogue scale for pain was lower in the IDA group than in the EA group on post-operative Day 1(4.060.7 vs 4.561.0,P=0.002)and post-operative Day 3(2.760.6 vs 3.460.6,P<0.001).The surgical complication rates were 8.3 and 16.0%in the IDA and EA groups(P=0.470),respectively.No complications such as anastomotic bleeding,stenosis and leakage occurred in any patient.Conclusions:IDA is safe and feasible and shows more satisfactory short-term outcomes than EA.