Move over 3G: here comes 4G

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Move over 3G: here comes 4G

机译：超越3G：4G来了

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"The future always comes too fast," Alvin Toffler, an eminent futurologist, once said, "and in the wrong order". The state of wireless telecoms is a classic example. Even as "third-generation" (3G) mobile networks are being switched on around the world, a couple of years later than planned, attention is shifting to what comes next: a group of newer technologies that are, inevitably, being called 4G. More hubris from the technology-obsessed industry? Not exactly. Some 4G networks are operating already, with more on the way. A technology once expected to appear around 2005 is here now.

机译：著名的未来学家阿尔文·托夫勒（Alvin Toffler）曾说：“未来总是过快。”无线电信的状态就是一个典型的例子。即使在全球范围内启动“第三代”（3G）移动网络时，也比计划的晚了几年，但注意力正在转移到下一步：一组不可避免地称为4G的较新技术。来自技术痴迷行业的更多狂喜？不完全是。一些4G网络已经在运行，并且还在运行中。曾经预计将在2005年左右出现的一项技术现在已经在这里。

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《The economist》 |2003年第8326期|p.63-64|共2页
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中图分类经济;各科经济学;
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2. Fidelity of binding of the guanidinium nucleic acid (DNG) d(Tg)4-T-azido with short strand DNA oligomers (A5G3A5, GA4G3A4G, G2A3G3A3G2, G2A2G5A2G2). A kinetic and thermodynamic study. [J] . Blasko A, Minyat EE, Dempcy RO, Biochemistry . 1997,第25期

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6. Alteration of the carbohydrate binding specificity of verotoxins from Gal alpha 1-4Gal to GalNAc beta 1-3Gal alpha 1-4Gal and vice versa by site-directed mutagenesis of the binding subunit. [O] . G J Tyrrell, K Ramotar, B Toye, 1992

机译：通过结合亚基的定点诱变改变了维毒素从Gal Gal 1-4Gal到GalNAc beta 1-3Gal alpha 1-4Gal的碳水化合物结合特异性反之亦然。
7. High pressure matrix-assisted laser desorption/ionization fourier transform mass spectrometry for minimization of ganglioside fragmentation11Abbreviations: Gangliosides are abbreviated according to the system of L. Svennerholm 1–3 as follows: GM1, Galβ1 → 3GalNAcβ1 → 4(Neu5NAcα2 → 3) Galβ1 → 4Glcβ1 → 1′Cer; GD1a, Neu5NAcα2 → 3Galβ1 → 3GalNAc β1→ 4(Neu5NAcα2 → 3)Galβ1 → 4Glcβ1 → 1′Cer; GT1b, Neu5NAcα2 → 3Galβ1 → 3GalNAcβ1 → 4(Neu5NAcα2 → 8Neu5NAcα2 → 3) Galβ1 → 4Glcβ1 → 1′Cer; GQ1b, Neu5NAcα2 → 8Neu5NAcα2 → 3Galβ1→3 GalNAcβ1 → 4 (Neu5NAcα2 → 8Neu5NAcα2 → 3)Galβ1 → 4Glcβ1 → 1′Cer; QP1 (in this case is a mixture of QP1b and QP1c), QP1b, Neu5NAcα2 → 8Neu5NAcα2 → 8 Neu5NAcα2 → 3 Galβ1 → 3GalNAcβ1 → 4(Neu5NAcα2 → 8Neu5NAcα2 → 3) Galβ1 → 4Glcβ1 → 1′Cer and QP1c, Neu5NAcα2 → 8Neu5NAcα2 → 3Galβ1→3 GalNAcβ1→ 4 (Neu5NAcα2 → 8 Neu5NAcα2 → 8Neu5NAcα2 → 3)Galβ1→ 4 Glcβ1 → 1′Cer. [O] . O’Connor Peter B, Mirgorodskaya Ekaterina, Costello Catherine E 2002

机译：最小化神经节苷脂碎片的高压基质辅助激光解吸/电离傅里叶变换质谱法11缩写：根据L. Svennerholm 1-3的系统，神经节苷脂的缩写如下：GM1，Galβ1→3GalNAcβ1→4（Neu5NAcα2→3） Galβ1→4Glcβ1→1′Cer; GD1a，Neu5NAcα2→3Galβ1→3GalNAcβ1→4（Neu5NAcα2→3）Galβ1→4Glcβ1→1'Cer; GT1b，Neu5NAcα2→3Galβ1→3GalNAcβ1→4（Neu5NAcα2→8Neu5NAcα2→3）Galβ1→4Glcβ1→1'Cer; GQ1b，Neu5NAcα2→8Neu5NAcα2→3Galβ1→3GalNAcβ1→4（Neu5NAcα2→8Neu5NAcα2→3）Galβ1→4Glcβ1→1'Cer; QP1（在这种情况下是QP1b和QP1c的混合物），QP1b，Neu5NAcα2→8Neu5NAcα2→8Neu5NAcα2→3Galβ1→3GalNAcβ1→4（Neu5NAcα2→8Neu5NAcα2c→3）Galβ1→4GlcNA12→8'Ner5NAcα2→8' 3Galβ1→3GalNAcβ1→4（Neu5NAcα2→8Neu5NAcα2→8Neu5NAcα2→3）Galβ1→4Glcβ1→1'Cer。

Move over 3G: here comes 4G

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