香花玉黑色斑块的矿物学与光谱学特征

2015年底在郴州临武陆续发现了透闪石质玉,这是湖南省第一次发现原生透闪石质玉矿床,国内对该玉石的研究基本是空白.利用宝石显微镜放大观察矿物外观特征,并且在常规岩石矿物光薄片鉴定基础上,利用红外光谱仪和X射线衍射仪大型仪器对香花玉中黑色斑块的矿物成分及光谱学特征进行详细系统的研究.经分析得出形成黑色斑块的矿物有两种:一...     

Efficacy of sodium chlorite as an inhibitor of enzymatic browning in apple slices

Sodium chlorite (SC) is an effective sanitizer for inhibiting microbial growth. This investigation was conducted to determine the efficacy of SC as a browning control agent for use on fresh-cut apple slices, applied alone, or in conjunction with organic acids. Additionally, the authors compared the efficacy of SC to that of acidified sodium chlorite (ASC) and to several other salts and examined the effect of pH and several different organic acids on efficacy of SC. The fresh-cut apple slices were dipped in treatment solutions for 1 min, then drained and placed in plastic containers at 20 °C for 24 h, and finally stored in polyethylene bags at 5 °C for 2 weeks. Color was measured periodically during storage. Lightness (L) values for all treated and control samples measured at 4 h, 24 h, and 2 weeks of storage were compared to L value for untreated samples measured immediately after cutting. Percent decrease in L-values was calculated for each sample at each time interval. Apple slices treated in ASC or SC solution had a significantly smaller decrease in L value indicating less browning than those treated in citric acid or water control at 4 h (P < 0.01), and with the exception of 1 g L⁻¹ ASC and 0.1 g L⁻¹ SC, all other ASC and SC treated slices still had significantly less browning than those for the water control (P < 0.01) at 24 h. After 2 weeks of storage, only SC (0.5–1.0 g L⁻¹), sodium bisulfite (0.5 g L⁻¹) and calcium l-ascorbate (10 g L⁻¹) continued to inhibit browning. Treatment with 0.5 g L⁻¹ SC and pH adjusted in the range from 3.9 to 6.2 using citric acid (CA) reduced browning more effectively than 0.5 g L⁻¹ SC without pH adjustment. Two organic acids, salicylic acid and cinnamic acid, when added to SC solution, were found to achieve even better inhibition of browning than CA at the same pH value.     

西湖凹陷古近系及新近系储层砂岩自生高岭石分布特征及形成机制

在西湖凹陷古近系及新近系储层砂岩中,自生高岭石是含量仅次于碳酸盐的第二大自生矿物,主要是长石等铝硅酸盐矿物溶解的产物;自生高岭石含量与砂岩碎屑中的长石含量有着明显的负相关性,自生高岭石含量在凹陷中呈现的东西分带、南高北低的分布特点与成岩作用过程中有机酸和大气水对长石等铝硅酸盐的溶解作用有关,其中有机酸作用明显强于大气水。西湖凹陷平湖组在西斜坡具有比中央反转带明显高的自生高岭石含量,南部地区相对北部地区具有相对较高的高岭石含量,说明西斜坡平湖组和南部地区具有更好的次生孔隙形成条件,其储层质量更好。     

粘土矿物对低渗透储层性质的影响——以鄂尔多斯盆地三叠系低渗透储层为例

粘土矿物是低渗砂岩储层的主要胶结物，对储层物性及开发过程中储层物性变化趋势有着重要的影响和控制作用。另外，粘土矿物也蕴含着大量沉积环境介质的物理化学信息，认识其自然规律，可以有效地指导预测有利储层，认识和改造油层。以鄂尔多斯盆地砂岩储层中的粘土矿物为研究对象，探讨分析粘土矿物对低渗储层性质的影响，该研究对含油气盆地低渗储层有效开发具有一定的参考价值。     

Removal of SO2 and NO from flue gas by wet scrubbing using an aqueous NaClO2 solution

This study used a NaClO₂/NaOH solution as the additive/absorbent to determine the extent of NO_x removal in a wet scrubbing system. A combined SO_x/NO_x removal system was also tested. The experiments were performed in a bench-scale spraying sieve tray wet scrubber in a continuous mode. The operating variables included NO and SO₂ concentrations, L/G ratio, molar ratio, and initial pH.

The results of the individual DeNO_x experiments show that the maximum DeNO_x efficiencies ranged from 3.1 to 12.6%. The results of the combined DeSO_x/DeNO_x experiments show that the maximum DeNO_x and DeSO_x efficiencies ranged from 36.6 to 71.9% and from 89.4 to 100.0%, respectively. The major parameters affecting NO_x removal efficiencies are the L/G ratio and the dosage of additive. The major parameter influencing DeSO_x efficiencies is the L/G ratio.     

周口拗陷和通许隆起二叠纪砂岩中石英的二次增生

对周口和通许两地区 4口井砂岩的薄片观察、多种测试、分析 ,发现砂岩中石英的增生可分窄边型、宽边型和自形边型 3种 ,增生石英的发育情况与砂岩的类型、成分等密切相关 .宽边和自形边型增生石英形成的温度一般在 1 0 0℃～ 1 50℃ .硅质物来源主要是孔隙内原生孔隙水供给、成岩过程中泥层蒙脱石→伊利石转化供给、或长石的溶解作用供给 .成岩中晚期有机质向烃转化发生脱羧基作用 ,地下流体变为酸性 ,促进了长石颗粒的溶解 ,增加了硅物质供给 .通过研究该地区内砂岩石英的增生 ,对进一步分析区内砂岩的孔隙演化、次生孔隙形成、砂岩储层物性等具有重要意义     

ClO_2及ClO_2~-和 ClO_3~-混合液对大鼠血液学指标的影响

通过对大鼠９０ｄ喂养试验,研究了ＣｌＯ２及其副产物ＣｌＯ２和ＣｌＯ３混合溶液对大鼠血液学指标的影响,结果表明,大鼠血液学指标,即白细胞计数（ＷＢＣ）和血红蛋白（Ｈｂ）方差分析结果显示,ＣＩＯ２混合液对其均未产生影响（ｐ＞０．０５）;对谷－丙转氨酶（ＡＬＴ）、总蛋白（ＴＰ）、白蛋白（ＡＬＢ）和球蛋白（ＧＬＯ）的方差分析表明,其对照组和高剂量组雌雄相比无显著性差异（ｐ＞０．０５）。     

Experiments and reaction characteristics of liquid phase simultaneous removal of SO<Subscript>2</Subscript> and NO

Experiments of simultaneous removal of SO₂ and NO from simulated flue gas, using NaClO₂ solution as the absorbent, were carried out in a self-designed bubble reactor, and high simultaneous removal efficiencies of SO₂ and NO were obtained under the optimal experimental conditions. The mechanism of simultaneous removal based on NaClO₂ acid solutions was proposed by analyzing the removal products. Possibility and limitation of the desulfurization and denitrification using NaClO₂ acid solutions were calculated by thermodynamic methods. Experimental results of reaction kinetics for simultaneous desulfurization and denitrification indicated that the oxidation-absorption processes of SO₂ and NO were divided into two zones, namely the fast and slow reaction zones. In the slow reaction zones both were zero order reactions, and in the fast reaction zones, the reaction order, rate constant and activation energy of SO₂ reaction with absorbent were 1.4, 1.22 (mol·L⁻¹)^−0.4·s⁻¹ and 66.25 kJ·mol⁻¹, respectively, and 2, 3.15×10³ (mol·L⁻¹) ⁻¹·s⁻¹, and 42.50 kJ·mol⁻¹ for NO reaction, respectively. Supported by the National High-Tech Research and Development Program of China (“863” Project) (Grant No. 2007AA061803)