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You searched for: Journal Chinese science bulletin Remove constraint Journal: Chinese science bulletin Publication Year 2011 Remove constraint Publication Year: 2011 Source 2011 v.56 no.13 Remove constraint Source: 2011 v.56 no.13
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1. Acylation of nitriles to β-ketonitriles catalyzed by a heterometallic alkoxide cluster of neodymium and sodium: NdNa8(O tBu) 10(OH)

Author:
Liu, HaiDong; Li, Lan; Sheng, HongTing; Zhu, XueHua; Xu, Fan; Shen, Qi
Source:
Chinese science bulletin 2011 v.56 no.13 pp. 1357-1360
ISSN:
1001-6538
Subject:
X-ray diffraction; acylation; esters; neodymium; sodium
Abstract:
... Catalytic acylation of nitriles with esters in the presence of 10 mol% NdNa8(OtBu)10(OH) is developed. The procedure is suitable for both enolizable and nonenolizable esters and affords β-ketonitriles in moderate to high yields. The heterometallic alkoxide cluster NdNa8(OtBu)10(OH) is structurally characterized by X-ray diffraction, and a mechanism for the production of β-ketonitriles using the ...
DOI:
10.1007/s11434-011-4451-x

2. Application study of a correction method for a spacecraft thermal model with a Monte-Carlo hybrid algorithm

Author:
Cheng, WenLong; Liu, Na; Li, Zhi; Zhong, Qi; Wang, AiMing; Zhang, ZhiMin; He, ZongBo
Source:
Chinese science bulletin 2011 v.56 no.13 pp. 1407-1412
ISSN:
1001-6538
Subject:
algorithms; coatings; heat transfer coefficient; models; satellites; system optimization
Abstract:
... The correction of a thermal model for a thermally controlled satellite in ground test conditions is studied using a Monte Carlo hybrid algorithm. First, the global and local parameters are summarized according to sensitivity analyses on uncertain parameters, and then the model correction is treated as a parameter optimization problem to be solved with a hybrid algorithm. Finally, the correction of ...
DOI:
10.1007/s11434-010-4053-z

3. Bone morphogenetic protein 2 improves patellar tendon healing by promoting migration and proliferation of tenocytes

Author:
Li, Zhen; Shen, XiaoTao; Cao, Liang; Yuan, ZiQiang; Chen, SiYun; Zheng, Xin; Tang, MeiKuen; Lee, Kenneth K.; Cai, DongQing
Source:
Chinese science bulletin 2011 v.56 no.13 pp. 1361-1369
ISSN:
1001-6538
Subject:
bone morphogenetic proteins; genes; in situ hybridization; in vivo studies; rats; tendons
Abstract:
... The repair of injured tendons remains a great challenge because of the poor intrinsic healing capacity of tendons. In this study, we examined the spatiotemporal expression pattern of the bone morphogenetic protein 2 (bmp-2) gene in normal and experimentally injured rat patellar tendons. We also investigated the ability of exogenously applied BMP-2 to promote patellar tendon healing. In situ hybrid ...
DOI:
10.1007/s11434-011-4438-7

4. Broadband SESAM for mode locked Yb:fiber lasers

Author:
Chen, LingLing; Zhang, Meng; Wang, Xi; Li, WenChao; Wei, Yun; Ma, YunFeng; Fan, ZhongWei; Niu, Gang; Yu, Jin; Liu, Yang; Zhang, Xue; Zhang, ZhiGang
Source:
Chinese science bulletin 2011 v.56 no.13 pp. 1348-1351
ISSN:
1001-6538
Subject:
electronic equipment; lasers; wavelengths; ytterbium
Abstract:
... We report a semiconductor saturable absorber mirror (SESAM) with phase shift compensation. The SESAM shows a uniform low-intensity reflectivity and a modulation depth up to 12% for the wavelength from 1000 to 1100 nm. A linear cavity all-normal dispersion Yb-doped fiber laser has proved its mode locking performance for the wavelength of both 1030 nm and 1064 nm. ...
DOI:
10.1007/s11434-011-4432-0

5. Carbon and hydrogen isotopic compositions and their evolutions of gases generated by herbaceous swamp peat at different thermal maturity stages

Author:
Duan, Yi; Zhang, XiaoLi; Sun, Tao; Wu, BaoXiang; He, JinXian; Xu, Li
Source:
Chinese science bulletin 2011 v.56 no.13 pp. 1383-1389
ISSN:
1001-6538
Subject:
carbon; case studies; ethane; gases; hydrogen; methane; organic matter; peat; swamps
Abstract:
... Coalbed methane (CBM) accumulation models include continuous gas accumulation and staged gas accumulation. However, studied on the geochemical characteristics and indices to evaluate staged accumulation CBM are lacking. This study for the first time obtained the carbon and hydrogen isotopic compositions of methane and ethane generated at different evolution stages using thermal simulation of sampl ...
DOI:
10.1007/s11434-011-4356-8

6. Cluster model for wave patterns of a 3D vertically vibrated granular system

Author:
Cai, Hui; Miao, GuoQing
Source:
Chinese science bulletin 2011 v.56 no.13 pp. 1340-1347
ISSN:
1001-6538
Subject:
equations; models; vibration; vibrational properties
Abstract:
... Based on the cluster model for wave-like motions of a 2D vertically vibrated granular system we established previously (Chin Phys Lett, 2010, 27: 124501), a generalization of the cluster model for a 3D granular system is presented in this paper. The 3D cluster model proposes frustums of pyramids as clusters of the 3D granular system, and explains wave patterns as the result of the cluster-boundary ...
DOI:
10.1007/s11434-011-4426-y

7. Genetic consequences of postglacial colonization by the endemic Yarkand hare (Lepus yarkandensis) of the arid Tarim Basin

Author:
Shan, WenJuan; Liu, Jiang; Yu, Li; Robert, W. Murphy; Mahmut, Halik; Zhang, YaPing
Source:
Chinese science bulletin 2011 v.56 no.13 pp. 1370-1382
ISSN:
1001-6538
Subject:
DNA; Lepus; ecosystems; genes; genetic techniques and protocols; genetic variation; haplotypes; hares; nucleotide sequences; phylogeny; refuge habitats; China
Abstract:
... Orogenesis of the Qinghai-Tibetan Plateau, which occurred in a stepwise manner, contributed to the extreme aridity of the Tarim Basin, resulting in vulnerable and unstable ecosystems. Quaternary climatic oscillations may have affected the ecosystems and, consequently, the distributions and genetic structuring of the Tarim Basin’s biota. We used nucleotide sequence data from 2 mitochondrial (mt) ...
DOI:
10.1007/s11434-011-4460-9

8. Intrinsic abnormal electromagnetic medium based on polar lattice vibration

Author:
Wang, Rui; Zhou, Ji; Qiu, XiangGang
Source:
Chinese science bulletin 2011 v.56 no.13 pp. 1318-1324
ISSN:
1001-6538
Subject:
electromagnetic radiation; materials; metals; vibration
Abstract:
... A new class of media with abnormal electromagnetic parameters has been attracting increasing attention because of its exotic properties and potential application. Currently, typical metamaterials are mainly composed of artificially designed metallic periodic structures. However, due to the limitations of available fabrication technologies, physical size and material effects, it is difficult to rea ...
DOI:
10.1007/s11434-011-4428-9

9. Nonvolatile memory devices based on organic field-effect transistors

Author:
Wang, Hong; Peng, YingQuan; Ji, ZhuoYu; Liu, Ming; Shang, LiWei; Liu, XingHua
Source:
Chinese science bulletin 2011 v.56 no.13 pp. 1325-1332
ISSN:
1001-6538
Subject:
electricity; electronic equipment; electronics; iron; polymers
Abstract:
... Among the many possible device configurations for organic memory devices, organic field-effect transistor (OFET) memory is an emerging technology with the potential to realize lightweight, low-cost, flexible charge storage media. In this feature article, the recent progress in the classes of OFET-based memory, including floating gate OFET memory, polymer electret OFET memory, ferroelectric OFET me ...
DOI:
10.1007/s11434-010-4240-y

10. Shock tube study on auto-ignition characteristics of kerosene/air mixtures

Author:
Zhang, YingJia; Huang, ZuoHua; Wang, JinHua; Xu, ShengLi
Source:
Chinese science bulletin 2011 v.56 no.13 pp. 1399-1406
ISSN:
1001-6538
Subject:
air; atomization; free radicals; heat production; kerosene; oxygen; temperature; toluene
Abstract:
... Ignition delay times are obtained for kerosene/air mixtures behind the reflected shock waves at temperatures between 1445 and 1650 K, at a pressure of 0.11 MPa and an equivalence ratio of 1.0. A nebulization device with Laval nozzle is used to nebulize kerosene and form an aerosol phase, which evaporates and diffuses rapidly behind the incident shock waves. Mixtures auto-ignite behind the reflecte ...
DOI:
10.1007/s11434-010-4293-y

11. Small-scale convection beneath oceans and continents

Author:
Sleep, Norman H.
Source:
Chinese science bulletin 2011 v.56 no.13 pp. 1292-1317
ISSN:
1001-6538
Subject:
heat; oceans; rheology; temperature; viscosity
Abstract:
... Small-scale convection supplies heat flow of ∼17 mW m−2 to the base of stable continents where xenolith studies resolve the geotherm. However, effects of small-scale convection are difficult to resolve in ocean basins. On first pass, most seafloor appears to subside to an asymptote compatible with ∼40 mW m−2 convective heat flow. These common regions are tracked by hotspots so uplift assoc ...
DOI:
10.1007/s11434-011-4435-x

12. Stabilization of linear systems with distributed input delay using reduction transformation

Author:
Choon, Ki Ahn
Source:
Chinese science bulletin 2011 v.56 no.13 pp. 1413-1416
ISSN:
1001-6538
Subject:
electronic equipment; electronics; equations
Abstract:
... We propose a new stabilization method for linear systems with distributed input delay via reduction transformation and Riccati equation approach. In the presented stabilization scheme, the gain matrix of controller is constructed by the well-known linear control technique for delay-free systems. The transformation kernel matrix can be determined by solving the non-symmetric matrix Riccati equation ...
DOI:
10.1007/s11434-010-4152-x

13. Synthesis of boron-doped diamond with laser heated diamond anvil cell

Author:
Zhang, WeiWei; Chen, LiangChen; Jin, ChangQing; Wang, XueJin; Liu, YuYing; Liu, Jing
Source:
Chinese science bulletin 2011 v.56 no.13 pp. 1336-1339
ISSN:
1001-6538
Subject:
X-ray diffraction; boron; temperature
Abstract:
... Boron-doped diamond has been synthesized from graphite mixed with different ratio of B4C at high pressure high temperature (HPHT) using laser heated diamond anvil cell. The starting composition was transformed to diamond compound at pressure ∼9 GPa, 2300–2400 K as indicated by the in-situ X-ray diffraction pattern with synchrotron radiation source. Raman spectrum of the recovered specimen from ...
DOI:
10.1007/s11434-011-4368-4

14. The methodology of quantitative assess economic output of climate change

Author:
Chou, JieMing; Dong, WenJie; Feng, GuoLin
Source:
Chinese science bulletin 2011 v.56 no.13 pp. 1333-1335
ISSN:
1001-6538
Subject:
climate change; crops; economics; meteorological data; models; China
Abstract:
... A method is introduced in this paper to study the effect of future climatic change on the economy. The researchers determine the economic output of climate change from historical data, and provide a method to quantitatively predict economic output of climate change by an economic-climatic model. A historical reciprocating examination is used to analyze output data for various crops in eight agricu ...
DOI:
10.1007/s11434-011-4429-8

15. The occurrence and significance of C25HBI in Cenozoic saline lacustrine source rocks from the Western Qaidam Basin, NW China

Author:
Zhang, YongDong; Sun, YongGe; Xie, LiuJuan; Jiang, AiZhu; Chai, PingXia
Source:
Chinese science bulletin 2011 v.56 no.13 pp. 1390-1398
ISSN:
1001-6538
Subject:
dissolved carbon dioxide; primary productivity; organic matter; isoprenoids; rocks; carbon; alkanes; trophic relationships; China
Abstract:
... The saline lacustrine deposit of the Oligocene Lower Ganchaigou Formation is the main source rock for the Western Qaidam Basin, NW China. In this study, abundant highly branched isoprenoids with 25 carbon atoms (C25HBI) were detected in the upper section of the Lower Ganchaigou Formation. C25HBI is a biomarker for diatoms, and can provide information regarding biogeochemical processes during produ ...
DOI:
10.1007/s11434-011-4430-2

16. Uptake kinetics of 3-buten-1-ol, 4-penten-1-ol and 3-methyl-3-buten-1-ol into sulfuric acid solutions

Author:
Xu, ZhiFang; Liu, Ze; Ge, MaoFa; Wang, WeiGang
Source:
Chinese science bulletin 2011 v.56 no.13 pp. 1352-1356
ISSN:
1001-6538
Subject:
acidity; aerosols; alcohols; atmospheric chemistry; ionization; spectrometers; sulfuric acid; volatile organic compounds
Abstract:
... Unsaturated alcohols are important components in complex mixtures of oxygenated volatile organic compounds, and play a significant role in atmospheric chemistry. The uptake kinetics of 3-buten-1-ol (BO31), 4-penten-1-ol (PO41) and 3-methyl-3-buten-1-ol (MBO331) into 20 wt%-80 wt% H2SO4 solutions were studied, using a rotated wetted-wall reactor coupled to a differentially pumped single-photon ioni ...
DOI:
10.1007/s11434-011-4461-8