编者按

面对日益严重的能源与环境问题，为保障能源安全，保护生态环境，实现可持续性发展，我国和世界其它国家都十分重视可再生能源的开发和利用。国务院关于替代能源的发展思路是：以新能源替代传统能源，以优势能源替代稀缺能源，以可再生能源替代化石能源，逐步提高替代能源在能源结构中的比重。我国把车用燃料和替代石油产品作为发展重点，因而利用农林生物质发展燃料乙醇和生物柴油等可再生能源具有重要意义。2007年6月7日，国务院总理温家宝主持召开国务院常务会议，审议并原则通过了《可再生能源中长期发展规划》。规划中明确提出，发展可再生能源不得占用耕地，不得消耗大量粮食，不得破坏生态环境。因此，发展燃料乙醇、生物柴油产业必须主要以非粮农林生物质为原料，采用先进的清洁生产技术。     

高分子保护溶液还原法制备球形超细镍粉

高分子保护溶液还原法制备球形超细镍粉沈勇，张宗涛，赵斌，朱裕贞，胡黎明（华东理工大学国家超细粉末工程研究中心，上海２００２３７）戴慕仉（华东理工大学分析测试中心，上海２００２３７）超细镍粉由于表面活性高、导电性和导热性好而被广泛用于电池电极、硬质合金...     

1,3,4,6-四-O-乙酰基-β-D-氨基葡萄糖的合成

分别用对甲氧基苯甲醛和苯甲醛保护D-氨基葡萄糖的氨基，再将羟基用乙酰基保护，以氯化氢脱去氨基上的保护基团，最后脱去氯化氢得到1，3，4，6-四-0-乙酰基-β-D-氨基葡萄糖。两种方法的总产率分别为59％和61％。道关键中间体3b未见报，其结构经^1H NMR表征。     

Novel Phenomenon of Oxygen-to-oxygen Silyl Migration in Directed Aldol Reaction

The phenomenon of migration of the silyl groups from α-oxygen to β-oxygen in sodium aldol reaction was observed for the first time in this paper.     

无保护流体室温燐光法测定吲哚-3-丁酸的研究

在仅以碘化钾为重原子微扰剂、亚硫酸钠为除氧剂及无任何保护性介质存在的水溶液中 ,吲哚_3_丁酸 (IBA)能发射很强的室温光 (RTP) ;详细研究了分析测定条件及有机溶剂对RTP的影响 ;在最大光波长λex/λem =281/447nm处 ,光强度与IBA浓度在2.0×10 -7～1.0×10 -5mol/L范围内呈良好的线性关系 ,检出限4.3×10-8 mol/L ;方法直接用于强化水样和土壤中IBA的测定 ,回收率96 %～104 % ,相对标准偏差2.37 %～3.97 %。     

Analysis and Protection of One Thousand Hand Buddha in Dazu Stone Sculptures

The components of the rock, the pigments, the gold foils and the adhesive of One Thousand Hand Buddha in Dazu stone sculptures, Chongqing, China, have been analyzed by X-ray diffraction (XRD), X-ray fluorescence (XRF), infrared spectroscopy (IR), energy dispersive X-ray analysis (EDX) and fiber optics reflectance spectroscopy (FORS). Furthermore, the weathering and degeneration of One Thousand Hand Buddha have been discussed and the protective methods have been provided. In this work some useful information to study on conservation of stone relics is given.     

微波辅助RGD环肽的固相合成

以2-氯代三苯甲基氯树脂为载体，采用Fmoc/t-Bu/Dmab正交保护策略，在微波辅助下合成了环肽c(fKRGD)，收率22.5%，纯度94.5%，其结构经MS(ESI), MS(MALDI-TOF)和HPLC确证。     

DFT Study of Metal Atoms Adsorbed at Low-coordinated Sites of MgO （001） Surface

1 INTRODUCTION The interfaces between metals and oxide play a vital role in many industrial applications: hetero- geneous catalysis, microelectronics, thermal barriers, corrosion protection, metal processing and so on[1]. In catalysis, the choice of metal and oxide support is critical in order to obtain a desired reactivity and selectivity[2]. This is due in part to the inherent reac- tivity of the two components. Also the size and shape of the metal particle, which depend on the choice…     

A Flexible Approach to the γ－Amino－β－hydroxy Acid Moiety of Hapalosin

A flexible approach to ethyl (3R,4S)-N-Boc-4-amino-3-hydroxy-5-phenylpentanoate (N-Boc-AHPPA-OEt), the γ-amino-β-hydroxy acid moiety of hapalosin is described. The synthetic method features a ring-opening ethanolysis of an activated N-Boc-lactam, which is obtained via a diastereoselective reductive-alkylation of (R)-malimide derivative. The flexibility of the method resides in the introduction of the alkyl side chain by Grignard reagent addition.     

考虑专利保护和渠道偏好的再制造双渠道闭环供应链决策与协调

本文在电子商务环境下考虑消费者对零售渠道和直销渠道具有不同的渠道偏好,研究了专利许可零售商实施再制造的双渠道闭环供应链定价决策和协调问题。运用博弈论方法求得了集中决策和分散决策情形下的最优定价策略,并分析了消费者渠道偏好系数对节点企业最优定价策略及利润的影响。针对分散决策存在效率损失的问题,以集中决策的最优解为基准,通过联合运用一个由批发价格、直销价格和专利许可费构成的定价机制和一个利润分享机制,实现了双渠道闭环供应链的完美协调。