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糖精

糖精的相关文献在1982年到2023年内共计609篇,主要集中在轻工业、手工业、化学工业、预防医学、卫生学 等领域,其中期刊论文275篇、会议论文5篇、专利文献329篇;相关期刊220种,包括致富天地、科技致富向导、农村新技术等; 相关会议5种,包括第十一届全国应用化学年会、2002全国电子电镀学术年会、'2001中国成都表面处理学术年会等;糖精的相关文献由1192位作者贡献,包括李胜彬、杨国新、张卫民等。

糖精—发文量

期刊论文>

论文:275 占比:45.16%

会议论文>

论文:5 占比:0.82%

专利文献>

论文:329 占比:54.02%

总计:609篇

糖精—发文趋势图

糖精

-研究学者

  • 李胜彬
  • 杨国新
  • 张卫民
  • 赵利宽
  • 齐枫楠
  • 张建军
  • 高缘
  • 齐化多
  • P·普拉茨
  • 李建民
  • 期刊论文
  • 会议论文
  • 专利文献

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    • 项硕; 金雨鸿; 李青松; 宋亚丽; 黄奕鸣; 马晓雁
    • 摘要: 糖精(Saccharin,SAC)是一种最早应用于食品、饮料、医药和饲料中的人工甜味剂,几乎不为人体和生物吸收,经排放进入水环境中,因检出频率及浓度高,衰减慢且存在毒性风险等被认定为环境新型有机污染物。本文对比了饮用水的多种预氧化工艺对水中SAC的降解效果,对UV/H_(2)O_(2)联用工艺降解SAC进行了动力学分析,同时,考察了氧化剂量、初始SAC浓度和水中常见共存阴离子()等因素对氧化体系降解SAC的影响。结果表明:1)氯化、单独的UV或H_(2)O_(2)对SAC去除能力低,分别为21.17%、9.74%和7.69%。臭氧和UV/H_(2)O_(2)联用两种氧化工艺对SAC的去除效果良好,氧化接触时间30 min后降解率均高于85%,UV/H_(2)O_(2)联用的降解和矿化速率更快。连续臭氧维持7.10 mg/min通量60 min可降解99%以上的SAC,与20.4 mg/L H_(2)O_(2)在1.46 mW/cm2 UV光强辐照60 min的效果相当。2)在对UV/H_(2)O_(2)联用工艺的影响因素考察中发现,H_(2)O_(2)投加量的增加会加快SAC的降解速率,但高浓度H_(2)O_(2)会抑制降解作用;UV光强的增加可促进降解反应,SAC初始浓度的增加会降低降解速率;酸性及较高温度对反应有促进作用。对糖精进行降解,UV/H_(2)O_(2)体系的最佳氧化条件为20.4 mg/L H_(2)O_(2),1.46 mW/cm2辐照量,酸性条件(pH值3),水温30°C。水中常见离子对UV/H_(2)O_(2)降解SAC存在抑制作用,强弱次序依次为NO_(3)^(-)>SO_(4)^(2-)>CO_(3)^(2-)>Cl^(-)。3)UV/H_(2)O_(2)降解SAC主要通过羟基自由基(·OH)反应,降解途径可能为苯环被自由基羟基化,C-N键断裂。臭氧对SAC的降解效率较高,但氧化剂投加量较大,UV/H_(2)O_(2)联用可更高效地降解SAC,但能耗较高。因此仍需探索低碳、高效去除水源水中SAC等微量有机污染物的工艺。
    • 钟凯
    • 摘要: 你可能听说过一类食品添加剂,叫“甜味剂”,比如最常见的糖精、阿斯巴甜。但你可能不知道它们的来历,其实是一些不遵守实验室操作规程的粗枝大叶的理科男无意中发现或发明了它们:1879年一个俄国化学家在实验室倒腾完瓶瓶罐罐,没洗手就回家吃饭,结果发现吃啥都是甜的,“糖精”被发现;1965年一个叫施莱特的化学家在合成药物的时候无意中舔了一下手指,大名鼎鼎的甜味剂“阿斯巴甜”问世。
    • 李楠
    • 摘要: 周五的中午,默默去给在食品厂工作的小姨送东西,结果却发现小姨的办公室里空无一人。就在这时,地上的一个小瓶子吸引了默默的注意,他弯腰将瓶子捡了起来,只见上面写着"糖精"二字。默默坐在小姨的座位上,拿着那瓶糖精看个不停。他忽然想到小姨曾经说过,许多食品里都有糖精这种成分,就忍不住嘀咕了一句:"我猜发明糖精的人一定非常聪明吧?"默默的话音未落,智慧精灵就突然出现了。
    • 无1
    • 摘要: (1)糖盐瓜子:取食盐350克、糖精适量。先把糖精溶解于盐水中。把5公斤瓜子清洗后沥干倒入炒锅,加工盐水,用缓火炒熟,出锅后喷以香精5克即可。(2)油香瓜子:将5公斤西瓜籽清洗后沥干炒热,加熟油50克,分别加盐75克,糖精适量,炒到接近熟时,再加同样量的油、盐水和糖精,继续炒到干燥;出锅喷上5克香精即可。
    • 崔智军
    • 摘要: 由于糖精有利于减小铁磁薄膜的内应力,而这种内应力在镍铁合金的许多应用中是不利的,故在镍铁镀液中,糖精是常用的添加剂.在镀液其他成份不变的基础上,研究了仅当糖精浓度2.5~20 g/L变化时,内置电镀长条形铁芯磁通门噪声的变化情况.对以上长条形铁芯构成的磁通门,进行了噪声功率谱密度测试,结果表明:当糖精浓度从2.5 g/L增加到20 g/L时,1 Hz噪声功率谱密度从9.387槡nT/ Hz非线性地减小到了1.386槡nT/ Hz;同时也表明为了使磁通门的噪声最小时,最常用的糖精浓度(5 g/L)并不是最好的浓度,而应是更大的糖精浓度.%Saccharin is a common additive used in nickel iron alloy plating baths for electroplating of NiFe alloy. The reason is that saccharin is beneficial to decrease the internal stress of ferromagnetic thin film,which is unfavorable in many applications of electroplated NiFe alloy.Change of magnetic noise with the long strip iron core based on the unchanged other composition of plating bath is studied while the only concentration of saccharin is changed from 2.5 g/L to 20 g/L.The noise power spectrum density has been measured for the fluxgate sensor based on the long strip iron core made under different saccharin concentration. The results show that a noise spectral density decreased nonlinearly from 9. 387 nT/√Hz at 1 Hz for 2. 5 g/L saccharin concentration to 1.386nT/√Hz when saccharin is increased to 20 g/L. This also show that the most common saccharin concentration of 5 g/L in fact is not the best concetration when it comes to minimize the noise of the fluxgate,but larger concentration is required.
    • 王品品; 陈爽; 董金诗; 汪宝和
    • 摘要: 研究了大孔树脂H1020对糖精(邻苯甲酰磺酰亚胺)的吸附性能.在温度为303.15、308.15、313.15和318.15 K条件下分别测定了吸附平衡数据.分别采用了拟一级动力学模型和拟二级动力学模型对实验数据进行模拟,结果表明拟二级动力学方程更适合描述H1020型大孔树脂对糖精的吸附过程.用Langmuir和Freundlich吸附等温方程对实验数据进行拟合,结果表明糖精在大孔树脂H1020上的吸附平衡符合Freundlich吸附等温方程.计算糖精吸附过程的吸附焓变、吸附自由能和吸附熵变,根据吸附热力学值可判断出H1020型大孔树脂对糖精的吸附过程是自发的、放热的物理吸附.%The adsorption capability of macroporous resin H1020 for saccharin (o-benzoic sulfimide) was studied.The adsorption equilibrium experiments were conducted under 303.15,308.15,313.15 and 318.15 K.The experimental data were fitted to pseudo-first order model and pseudo-second order model respectively.The adsorption process of saccharin on macroporous resin H1020 could be described better by pseudo-second order model.The adsorption data are correlated with the Langmuir and Freundlich isotherm equation.The results showed that Freundlich isotherm equation was better to describe the isothermal adsorption of saccharin on the macroporous resin.The values of the thermodynamic parameters including the changes in Gibbs free energy,enthalpy and entropy are calculated.We can conclude from these thermodynamic parameters that the adsorption process of saccharin on macroporous resin H1020 is spontaneous and exothermic physical adsorption.
    • S. MAHDAVI; S. R. ALLAHKARAM
    • 摘要: Nanocrystalline cobalt coatings were produced from cobalt sulfate based electrolytes by using pulse current electrodeposition technique. The effects of bath composition and electrodeposition condition on current efficiency, morphology, structure and hardness of the coatings were investigated and the optimum deposition condition was determined. It was found that increment of cobalt sulfate concentration and sodium dodecyl sulfate (SDS) concentration in the bath had a negligible effect on microhardness of the coatings, while they were effective on electrodeposition current efficiency. Adding saccharin to electrodeposition bath decreased crystallite size of hexagonal close-packed (hcp) cobalt films and increased their microhardness without significant effect on current efficiency. Smoother and less defective coatings were also obtained from baths containing SDS and saccharin. The results revealed that both the current efficiency and microhardness were changed by variation of peak current density and duty cycle. Besides change of smooth morphology of the coatings to needle-shaped one, crystallite sizes and preferred orientation also varied with increasing the current density and duty cycle.%采用脉冲电沉积技术从硫酸钴基电解液中制备纳米晶钴镀层,研究镀液组成和电沉积条件对电流效率以及镀层形貌、结构和硬度的影响,确定最佳沉积条件.研究发现,增大镀液中硫酸钴浓度和十二烷基硫酸钠(SDS)含量对镀层显微硬度的影响可忽略不计,而对电沉积电流效率的影响显著.在电沉积镀液中加入糖精,可使六方密堆结构(hcp)钴薄膜的晶粒尺寸减小,显微硬度提高,而对电流效率无显著影响.在含有SDS和糖精的镀液中获得的镀层表面更光滑,缺陷更少.结果表明,电流效率和显微硬度均随峰值电流密度和占空比的变化而变化,随着电流密度和占空比的增大,表面光滑的镀层变为针状,晶粒尺寸和择优取向也随之改变.
    • 谢幸秦; 周龙; 李延伟; 何贵香
    • 摘要: 在中性镀镍电解液中,以柠檬酸钠作为镍配位剂,镀液温度控制在45°C,研究了柠檬酸钠含量和阴极电流密度对镍镀层表面形貌、电解液电流效率和阴极极化的影响.结果表明,当阴极电流密度为0.6A·dm-2、柠檬酸钠质量浓度为120g·L-1时,镀层平整致密且裂纹较少,电流效率最高.糖精作为光亮剂,能较好地减少镍镀层裂纹,当糖精质量浓度为1.8g·L-1时,裂纹彻底消失,但对划痕的消除效果不佳.但过高的糖精质量浓度不利于镀液电流效率,糖精质量浓度为0.6g·L-1时有较好的镀液电流效率.%In this paper, sodium citrate was used as nickel complexing agent in the neutral plating solution. Electroplating was took place when the solution temperature was 45°C. The content of sodium citrate and the cathode current density were discussed to inspect the influence on the deposit morphology, electrolyte current efficiency and cathodic polarization. The results indicated that with the increasing of sodium citrate content, the cathode-current density of electrolyte decreased. The nickel deposit obtained was smooth and compact, when the cathode-current density was 0.6 A/dm2and the concentration of sodium citrate was 120g/L, the current efficiency was maximum. As the brightener, saccharin was better to reduce the crack. When the concentration of saccharin was 1.8g/L, the crack disappeared. But the removing effect of scratch was not good. Then excessive mass concentration of saccharin was bad for current efficiency of plating solution. When the concentration of saccharin was 0.6g/L, the current efficiency of plating solution was better.
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