Web10 mei 2024 · Hydroxyacetone sulfate, which may originate from both biogenic (Surratt et al., 2008) and anthropogenic emissions (Hansen et al., 2014), has been detected at … Web19 apr. 2016 · Organosulfates (OS) are important components of secondary organic aerosol (SOA) that have been identified in numerous field studies. This class of compounds within SOA can potentially affect aerosol physicochemical properties such as hygroscopicity because of their polar and hydrophilic nature as well as their low volatility.
Formation and photochemical investigation of brown carbon by ...
WebThe method is validated using six model compounds: methyl sulfate, ethyl sulfate, benzyl sulfate, hydroxyacetone sulfate, lactic acid sulfate and glycolic acid sulfate. A … Webthe first measurements of hydroxyacetone sulfate in ambi-ent PM2:5, from samples that were collected in Centreville, AL. 2 Materials and methods 2.1 Chemicals, reagents, and … bob hairstyles for black hair 2018
ACP - Organosulfates in Atlanta, Georgia: anthropogenic …
WebHydroxyacetone is the most critical component as it is nearly impossible to separate it from phenol by simple distillation. Hydroxyacetone is typically also the micro-impurity with the highest... 1.由丙二醇催化脱氢或溴丙酮与甲酸钾反应生成甲酸丙酮醇酯，然后水解制得。也可由甘油或丙二醇催化脱氢制得。 2.将工业丁酮进行精馏、超净过滤、超净分装，得到BV-Ⅲ级丁酮。 3.制法： 于装有搅拌器、回流冷凝器的反应瓶中，加入甲醇（含水＜0.2%）500mL，搅拌下慢慢加入甲酸钾110g(1.2mol),充分 … Meer weergeven 1. 性状：无色有刺激性液体，有香味。存在于啤酒、烟草和蜂蜜中。 2. 密度（g/mL,20/4℃）：1.0804 3. 熔点（ºC）：-17 4. 沸点（ºC）：44.415℃（分解） 5. 沸点（ºC,20KPa）：145~146 … Meer weergeven 1、 摩尔折射率：17.51 2、 摩尔体积（cm3/mol）：72.6 3、 等张比容（90.2K）：173.3 4、 表面张力（dyne/cm）：32.3 5、 极化率（10-24cm3）：6.94 Meer weergeven 1.稳定，易聚合成二聚体。除具有羟基和羰基性质外还易被氧化亚铜氧化，与苯肼生成脎，避免与强氧化剂、水分接触。易燃，易吸潮。使用时 … Meer weergeven 1.疏水参数计算参考值（XlogP）:-0.7 2.氢键供体数量:1 3.氢键受体数量:2 4.可旋转化学键数量:1 5.互变异构体数量:4 6.拓扑分子极性表面 … Meer weergeven Webglycine and ammonium sulfate† Yan Gao ab and Yunhong Zhang*ab Increasing attention has been paid to atmospheric “brown carbon” (BrC) aerosols due to their effect on the earth's climate. Aqueous BrC aerosols were formed through aqueous reactions of hydroxyacetone (HA) with nitrogen compounds such as glycine (Gly) and/or ammonium … bob hairstyles for black women 2022