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New photo-thermal-synthesized polymer for self-compacting concrete to increase productivity, minimize pollution, and eliminate steam curing in precast concrete

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Journal of Harbin Institute of technology(New Series) 2006年第5期13卷 518-524页

作者： F. C. Lai M. F. Mohd Zain 王宝民 K. C. Lee Dept. of Civil and Structural Engineering Faculty of Engineering Universiti Kebangsaan Malaysia 43600 U.K.M Bangi Selangor Darul Ehsan Malaysia Dept. of Civil Engineering Dalian University of Technology Dalian 116024 China sime darby technology Petaling Jaya Kuala Lumpur Malaysia

The objective in this study is to apply the sustainable chemistry and photo-thermal synthesis technology to produce the sustainable eco-superplasticiser for the sustainable high performance SCC concrete especially in hot tropical countries. A photo-thermal synthesized eco-superplasticiser （PSES） was produced by using photo-thermal catalyst in a solar chemical reactor. In this preliminary study, an unique high early strength of SCC concrete has been successfully produced by imposing an unique proportion of the photo-thermal-synthesized eco- Superplasticiser （PSES）, local fly ash, sand and aggregate. The SCC concrete is preliminary tried in the precast concrete product to produce the complicated geometries as Tunnel segment, U-shape beam, and Box girder which have the critical reinforcement and thin section concrete. Surprisingly, this SCC provide the benefits as eliminating steaming energy, increased productivity, and minimize pollution. These unique properties of sustainable SCC concrete can not be achieved by the convention concrete by using ligno, naphthalene and melamine base superplasficiser. The synthesized sustainable eco-superplasticiser is a perfect choice to fully utilized the renewable energy and improve the concrete working environment.

关键词： photo-chemical synthesis sustainable self-compacting concrete eco-superplasticiser eliminate steaming renewable solar energy

Assessment of Genetic Diversity of NIFOR Oil Palm Main Breeding Parent Genotypes Using Microsatellite Markers

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American Journal of Plant Sciences 2016年第1期7卷 218-237页

作者： Maxwell N. Okoye Michael I. Uguru Claude Bakoumé Rajinder Singh Christy O. Okwuagwu Plant Breeding Division Nigerian Institute for Oil Palm Research (NIFOR) Benin Nigeria Department of Crop Science Faculty of Agriculture University of Nigeria Nsukka Nigeria sime darby technology Centre UPM-MTDC Technology Centre III Serdang Malaysia Advanced Biotechnology and Breeding Centre Malaysian Palm Oil Board (MPOB) Persiaran InstitusiKajang Malaysia

The genetic diversity among 15 NIFOR breeding parents was assessed using 10 microsatellite markers. A high genetic diversity was observed with a total of 64 alleles including 23 rare alleles or alleles at frequencies less than 0.05. The NIFOR tenera parents recorded the highest number of rare alleles. The average observed heterozygosity and mean gene diversity across all parental groups were 0.6889 and 0.7029, respectively. Higher genetic diversity was detected among the NIFOR dura and tenera parents compared to that of the Deli dura parents in absolute terms. Analysis of molecular variance (AMOVA) showed that 87% of the total variation (p < 0.001) observed was due to differences among parents. Rogers’ genetic distance ranged from 0.2988 to 0.8000 (mean = 0.5570). The dendrogram constructed on the basis of Rogers’ genetic distance clustered the parents in three groups. They generally clustered in heterotic manner rather than by geographic origins. The groupings obtained through PCoA confirmed the results obtained by cluster analysis. The results obtained are strong assets for NIFOR breeding programme.

关键词： Allelic Diversity Elaeis guineensis Jacq Genetic Distance Heterosis Molecular Characterization NIFOR Population Genetics Selection SSR Markers

Bioguided Fractionation and Purification of Natural Bioactives Obtained from<i>Alpinia conchigera</i>Water Extract with Melanin Inhibition Activity

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Journal of Biomaterials and Nanobiotechnology 2013年第3期4卷 265-272页

作者： Zanariah Binti Ujang Thavamanithevi Subramaniam Mazita Md Diah Harmayumi Binti Wahid Badariah Binti Abdullah Ahmad Hazri Bin Abd Rashid David Appleton 3Department of Pharmacology Faculty of Medicine University of Malaya Kuala Lumpur Malaysia sime darby technology Centre Sdn. Bhd. UPM-MTDC Technology Centre III Universiti Putra Malaysia Serdang Malaysia. Industrial Biotechnol- ogy Research Centre SIRIM Bhd. No. 1 Persiaran Dato Menteri Shah Alam Malaysia Natural Product and Cosmetics Program SIRIM Bhd. No. 1 Persiaran Dato Menteri Shah Alam Malaysia

Crude extracts of Alpinia conchigera a species from the Malaysian Ginger (Zingiberaceae) family and its fractions obtained from various extraction methods were assayed for melanogenesis inhibition activity and cell viability. The crude extract obtained from the ethanolic extraction and the super critical fluid extraction did not exhibit significant melanin inhibition activity and was shown to be toxic to the melanocyte cells in comparison to the water extract. The crude aqueous extracts displayed melanin inhibition of 96.38 ± 1.60% and cell viability 109.90 ± 8.32% at a concentration of 500 μg/mL. Bioassay guided fractionation was performed on the water extracts to isolate the active compounds. The actives were identified as trans-cinnamaldehyde and chavicol glucopyranoside with both compound showing potent anti-melanogenesis activity. At 4.9 μg/ml, both trans-cinnamaldehyde and chavicol glucopyranoside gave 85% inhibition of melanin formation in vitro with 77% and 97% cell viability respectively. In comparison, kojic acid, a known skin lightening agent showed 90.0% inhibition at 100 μg/mL. The bioactive composition comprising the extract, active fraction, purified compounds or mixture thereof of Alpinia conchigera may be used for cosmetic and pharmaceutical applications, particularly for the purposes of reducing skin pigmentation.

关键词： Alpinia Conchigera Preparatory HPLC Fractionation Chavicol Glucopyranoside Trans Cinnamaldehyde Anti-Melanogenesis Activity

Biopolymers and Biomimetic Materials in Medical and Electronic-Related Applications for Environment-Health-Development Nexus:Systematic Review

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Journal of Bionic Engineering 2022年第6期19卷 1562-1577页

作者： Faris Mohammed AL-Oqla Mohammed Hassouna Alaaeddin Muhammad Enamul Hoque Vijay Kumar Thakur Department of Mechanical Engineering Faculty of EngineeringThe Hashemite UniversityP.O Box 330127Zarqa13133Jordan University College Fairview 2AJalan TP2Sime UEP Industrial Park Subang Jaya47600Subang JayaSelangorMalaysia Department of Biomedical Engineering Military Institute of Science and Technology(MIST)Mirpur CantonmentDhaka1216Bangladesh Biorefining and Advanced Materials Research Center Scotland’s Rural College(SRUC)Kings BuildingsEdinburghEH93JGUK School of Engineering University of Petroleum&Energy Studies(UPES)Dehradun248007UttarakhandIndia

Biocomposites as bio-inspired materials are produced from renewable resources that are organic and ecofriendly alternative *** improve the lifestyle of human beings as well as enhancing the environmental indices,functional bio-materials are now implemented in various promising *** work has systematically discussed and highlighted the implementations and trends of functional bionic materials in high tech industries,which are necessary for developing modern *** medical,electronic,food and pharmaceutical applications have been ***-inspired materials are used to develop more sustainable possibilities to increase environmental conservation while maintaining customer *** were found employed in several sectors for various functional bio-products including organic thin-film transistors,organic phototransistor,emitting diodes,photodiodes,photovoltaic solar cells,hybrid dental resins,sustainable pharmaceuticals,and food *** are used to create sustainable bio-products for energy storage and harvesting,bone regeneration,nerve damage repair,drug applications and various other industrial subcategories.

关键词： Biopolymers Bioinspired Biomimetic materials Tissue engineering Nerve repair Organic transistors

Synthesis and Crystal Structure of A Bimetallic Terbium Complex Tb2 {μ-CH2 sime2 NC6 H3 ^iPr2 -2, 6}3 （THF）3

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Journal of Rare Earths 2007年第5期25卷 554-557页

作者：罗云杰陈珏毛红雷 School of Biological and Chemical Engineering Ningbo Institute of Technology Zhejiang University

The reaction of 2, 6-^iPr2CbH3NHsime3 with Tb（CH2sime3）3（THF）2 in benzene at room temperature afforded a binuclear terbium complex Tb2 {μ-CH2 sime2 NC6 H3 ^iPr2 -2, 6}3（THF）3. X-ray diffraction revealed that Tb atoms were bridged by three methylene units. One Tb atom was six-coordinated by two nitrogen atoms, three methylene carbons, and one THF molecule, while the other Tb atom was six-coordinated by one nitrogen atom, three methylene carbons, and two THF molecules. Both Tb atoms adopted a distorted trigonal prism geometry.

关键词： terbium bimetallic arylamido ligand crystal structure rare earths

Syndiotactic Polymerization of Styrene and Copolymerization with Ethylene Catalyzed by Chiral Half-sandwich Rare-earth Metal Dialkyl Complexes

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Chinese Journal of Polymer Science 2018年第2期36卷 222-230页

作者： De-Qian Peng Xin-Wen Yan Shao-Wen Zhang Xiao-Fang Li Key Laboratory of Cluster Science of Ministry of Education School of Chemistry and Chemical Engineering Beijing Institute of Technology

The syndiotactic polymerization of styrene（St） and the copolymerization of St with ethylene（E） were carried out by using a series of chiral half-sandwich rare-earth metal dialkyl complexes（Cp^x＊） as the catalysts. The complexes are Ln（CH2sime3）2（THF）（1-4： Ln = Sc（1）, Ln = Lu（2）, Ln = Y（3）, Ln = Dy（4）） bearing chiral cyclopentadienyl ligand containing bulky cylcohexane derivatives in the presence of activator and AliBu3. For the St polymerization, a high activity up to 3.1 × 10^6 g of polymer mol Ln^-1·h^-1 and a high syndiotactic selectivity more than 99% were achieved. The resulting syndiotactic polystyrenes（sPSs） have the molecular weights（Mn） ranging from 3700 g·mol^-1 to 6400 g·mol^-1 and the molecular weight distributions（Mw/Mn） from 1.40 to 5.03. As for the copolymerization of St and E, the activity was up to 2.4 × 10^6 g of copolymer mol Sc^-1·h^-1·MPa^-1, giving random St-E copolymers containing syndiotactic polystyrene sequences with different St content in the range of 15 mol%-58 mol%. These results demonstrate that the bulky cyclopentadienyl ligands of the chiral half-sandwich rare-earth metal complexes effectively inhibit the continued insertion of St monomers into the（co）polymer chain to some extent in comparison with the known half-sandwich rare-earth metal complexes.

关键词： Half-sandwich Rare-earth metal complex Syndiotacti cpolymerization Copolymerization Styrene Ethylene

Reversible Insertion of CO_(2)into a Bis(formazanate)Magnesium Complex

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CCS Chemistry 2023年第6期5卷 1277-1284页

作者： Da Jin Xiaofei Sun Alexander Hinz Peter W.Roesky Institute for Inorganic Chemistry Karlsruhe Institute of Technology76131 Karlsruhe

The capture,storage,and release of CO_(2)is one of the most pressing issues in ***,we designed bis(formazanate)magnesium complexes as precursors,which were synthesized by straightforward transamination between the neutral formazan[PhNNC(4-tBuPh)NNHPh](LH)and[Mg{N(sime_(3))_(2)}_(2)].Depending on the solvent,either the homoleptic complex[L_(2)Mg]or the thf-coordinated complex[L_(2)Mg(thf)]was *** of the solvent-free complex[L_(2)Mg]with CO_(2)led to stoichiometric insertion into one of the four Mg–Nbonds with concomitant rearrangement of the ligand scaffold which adopts a trinuclear cagelike *** insertion reaction is reversible depending on thermolysis or treatment with tetrahydrofuran,which is corroborated by density functional theory *** showcases the first example of reversible uptake of CO_(2)by an s-block coordination compound.

关键词： reversibility CO_(2)activation formazanate magnesium s-block chemistry

Synthesis and crystal structure of [Y(C_5Me_4sime_3){μ-O(CH_2)_3CH_3}{N(SiHMe_2)_2}]_2

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Journal of Rare Earths 2011年第1期29卷 24-27页

作者：罗云杰冯晓莹 Organometallic Chemistry Laboratory Ningbo Institute of TechnologyZhejiang University Department of Polymer Science and Engineering Zhejiang University

A dimeric yttrium complex [Y（C5Me4sime3）{μ-O（CH2）3CH3} {N（SiHMe2）2}]2 （1） was isolated as one of the byproducts from the reaction of Y {N（SiHMe2）3}3（THF）2 with C5Me4Hsime3 in 1 ： 1.1 molar ratio in toluene at 100 ℃ for 2 d. Complex 1 was characterized by elemental analysis, NMR spectroscopy, FT-IR spectroscopy, and X-ray single crystal structure analysis. X-ray diffractions revealed that complex 1 was a symmetric dimer, and the center metal y^3＋ was six-coordinated by one nitrogen atom from the amide group, two bridging oxygen atoms from the O（CH2）3CH3 groups, and one cyclopentadienyl ring in η^5-fashion to adopt a distorted tetrahedron geometry. The formation of complex 1 was postulated to be a result fxom C O bond cleavage reaction of THF.

关键词： yttrium amide complex ring-opening reaction of THF synthesis crystal structure rare earths

Synthesis and crystal structure of（C5Me4sime3）[（^iPrN）2CCH2sime3]2Y

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Journal of Rare Earths 2009年第1期27卷 18-21页

作者：陈珏王秀莲罗云杰姚英明 Organometallic Chemistry Laboratory Ningbo Institute of TechnologyZhejiang University Department of Chemistry and Chemical Engi-neering Suzhou University

Reaction of（C5Me4sime3）Y（CH2sime）2（THF） with two equivalents of iPrN=C=NiPr in hexane at room temperature afforded a mixed-ligand yttrium complex（C5Me4sime3）（iPrN）2CCH2sime32Y.X-ray diffraction revealed that the center metal was nine-coordinated by one cyclopentadienyl ring and two amidinate ligands, and adopted a four-legged piano stool geometry.

关键词： organo yttrium complex insertion reaction crystal structure rare earths