The identity of Yoldia micrometrica Seguenza, 1877 and three new deep-sea protobranchs from the Mediterranean (Bivalvia)

Three new species are described from the relatively well-known deep Mediterranean protobranch fauna. Yoldiella wareni n. sp. is a miniaturized species so far misidentified as Yoldiella micrometrica (Seguenza, 1877), which is a Pleistocene species (neotype here designated). Yoldiella ovulum n. sp. is similar to Y. micrometrica, of which it may represent a descendant species. Ledella marisnostri n. sp. is the second species known for the genus in the Mediterranean. These three species are thought to be endemic to the Mediterranean, where they may represent either persisting Plio-Pleistocene species which survived the changes from psychrospheric to homeothermic conditions, or newly adapted species, evolved from Plio-Pleistocene ancestors. In the second case, they seem to be the result of an ongoing differentiation of the deep Mediterranean protobranch fauna from the North-East Atlantic one, due to the physical isolation of the Mediterranean basin.     

Sillago suezensis,a new whiting from the northern Red Sea,and status of Sillago erythraea Cuvier (Teleostei: Sillaginidae)

The status of Sillago erythraea Cuvier in Cuvier and Valenciennes 1829 is re-examined. A lectotype designation by McKay in 1985 fixes it as a junior synonym of Sillago sihama (Forsskål in Niebuhr, 1775), which is restricted to the southern Red Sea. Northern Red Sea populations previously assigned to S. sihama or S. erythraea, are here described as Sillago suezensis sp. nov. Sillago suezensis is also distributed in the eastern Mediterranean Sea due to Lessepsian immigration through the Suez Canal. The new species is characterized within the Sillago sihama group, which has the swimbladder divided posteriorly into two tapering extensions projecting below the vertebral column extending into the tail musculature, by the absence of scales on the preopercle and on most of the opercle, a total number of 34 vertebrae, the swimbladder with lateral extensions each spreading a blind tubule anterolaterally, and a low position of the nostril.

http://www.zoobank.org/urn:lsid:zoobank.org:act:B289CDF4-AE82-44D3-9AE1-4A2B514AD348     

Two new species of asterocherid (Copepoda: Siphonostomatoida) associated with a sponge from the Strait of Messina,Italy: taxonomic and ecological traits

Two new species of asterocherid associated with sponges are described from the Mediterranean Sea. They are Psilomyzon laetitiae sp. nov. and Psilomyzon sarcotragusicola sp. nov. The genus Psilomyzon consists of only one known species, P. pauciseta. The two new species can be easily distinguished from the cogener species by reduction of the endopod of leg 4. In P. pauciseta the leg 4 endopod is 3-segmented, with the third segment reduced; in both new species it is 2-segmented, with the second segment carrying an inner projection, possibly homologous to the third segment of the leg 4 endopod of P. pauciseta. In the two new species, the bifid outer process on male leg 4 second endopodal segment seems to be serially homologous to the similar processes on the same segment in legs 1–3, whereas the inner projection may represent a vestigial element of the third endopodal segment of leg 4.

http://zoobank.org/urn:lsid:zoobank.org:pub:33BF0653-BBA9-426B-B365-5D8C62DFD44A     

ESP飞灰对燃煤锅炉烟气汞的吸附特性

用氮气(N2)等温吸附(77K)测量了一座600MW煤粉锅炉电厂静电除尘器(ESP)各个电场飞灰的比表面积、孔径、孔比表面积、孔容积和孔分布,采用扫描电镜(SEM)和X射线能谱分析仪(EDX)分析了飞灰颗粒表面结构和化学组分.结果表明,颗粒粒径越小,比表面积越大,飞灰的汞吸附趋于增加.飞灰含碳量与汞含量呈正相关关系,亚微米级颗粒物对汞的吸附不仅与其比表面积有关,而且与其比表面积的利用率有关.静电除尘过程中飞灰的孔隙结构在不断地变化和发展,孔分布越宽越有利于对汞的吸附,微孔越发达且可利用率越高,越有利于汞的被吸附.     

用电子显微镜和能量色散谱研究硫酸与粉煤灰的固相反应

用扫描电子显微镜/能量色散谱(SEM/EDS),超级场发射电子显微镜(Super FE-S叫)研究了H2SO4与粉煤灰的固相反应.常温反应后,单个粉煤灰表面微区有明显的溶解点,粉煤灰在一定程度上出现粘结、结块现象.反应前后粉煤灰的组成变化不大,表明固相反应仅在粉煤灰表面进行,未渗入到颗粒内部.反应后所得水溶物主要是Al2(SO4)3、Fe 2(S04),.当反应温度达到200℃时,扫描电镜可观察到粉煤灰表面产生块状Al2(SO4)3、Fe 2(SO4)3结晶.250℃下反应产生的结晶物明显多于200℃,且导电性明显提高.热力学计算和表面纳米观测技术都表明,粉煤灰表面的铝、铁氧化物转化成可溶性的硫酸盐,氧化硅未参与化学反应.     

几种保鲜方法对柿子的影响

以柿子为材料,用不同试剂处理结合不同保鲜方式对柿子保鲜效果进行了研究,对调查数据进行回归方差分析和新复极差测验得出,柿子在存放过程中的烂果率及硬度的变化曲线为逻辑斯蒂曲线,用保鲜剂18^#和石灰水同时处理或丙二醇和丙三醇同时处理,能显著降低柿子烂果率并能较好地保持其硬度,贮藏方法以地窖贮存保鲜效果最好,缸存次之,空气中自然存放效果最差。     

掺粉煤灰高性能桥用混凝土变形性能研究

结合南京长江第二大桥的工程建设，对掺粉煤灰高性能混凝土变形性能进行了试验研究，混凝土力学性能试验依据GBJ81－85进行，收缩试验依据GBJ82－85进行，徐变试验依据JTJ270－98进行，自生收缩试验方法（除不加载外）同徐变试验，试验结果表明，掺Ⅰ级粉煤灰和高效减水剂的C50高性能混凝土不但具有良好的工作性能和力学性能，还可提高混凝土抵抗弹性变形，收缩变形和徐变变形的能力，与同强度等级未掺粉煤灰的混凝土相比较，掺入质量分数为12％－24％的Ⅰ级粉煤灰，取代10％－20％的硅酸盐水泥，其后期强度和抗压弹性模量增大，干燥收缩和徐变降低，通过分析研究，还得出不同粉煤灰掺量及配比的C50高性能混凝土徐变计算公式，可为实际工程中分析掺粉煤灰混凝土徐变性能提供帮助。     

真空冷冻干燥工艺中沙棘果共晶点测定与分析

阐述了共晶点在真空冷冻干燥工艺中的重要意义,在冻干试验中采用电阻法测定不同成熟度沙棘果的共晶点温度.对试验数据进行曲线拟合,确定共晶区,并根据函数曲率的物理意义,得出成熟度为"果皮黄色"和"果皮红色"的沙棘果共晶点分别为-22 ℃和-23 ℃.     

大孔径毛细管气相色谱法测定野生果汁中的氨基酸

建立了一种以正丁醇和七氟丁酸酐为衍生化试剂的氨基酸气相色谱分析法。优选了衍生化条件，对野生果汁中的氨基酸进行了分离及定量分析，经多种样品测定，均获得满意的分析结果。