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The corresponding thiochromanones were synthesized from β-arylthioethers of propionic acid under microwave irradiation in the presence of polyphosphoric acid. Their structures were confirmed by IR, 1H NMR, MS spectra and elemental analysis.

关于这些化合物合成曾有一些报道：以硫酚及卤代羧酸为原料在回流或超声作用下合成β-芳硫丙酸，芳硫丙酸在浓硫酸或磷酸作用下环化制备硫色满酮[1，2]。

It was proved by IR spectroscopy that Zn2+ and hydrolyzed ion were chelated with polysilicic acid to produce the polymer of zinc-silicon. The reaction was not the simple physical blending,but the chemical reaction forming the inorganic polymer with special structure.

红外光谱证实了PZSS中Zn2+及水解Zn2+离子可与共存的聚硅酸起螯合反应生成锌硅聚合物，聚硅酸与Zn2+反应并不是单纯的物理混合加成作用，而是形成了具有特殊结构的无机高分子的化学反应，这种新型絮凝剂所具有的优良絮凝特性是由各物质间以化学作用为主的物理化学因素共同作用的结果。

It was proved by IR spectroscopy that Zn(superscript 2+) and hydrolyzed ion were chelated with polysilicic acid to produce the polymer of zinc-silicon. The reaction was not the simple physical blending, but the chemical reaction forming the inorganic polymer with special structure. The better flocculating efficiency was resulted mainly from the chemical and physico-chemical factors among the components.

红外光谱证实了PZSS中Zn(上标 2+)及水解Zn(上标 2+)离子可与共存的聚硅酸起螯合反应生成锌硅聚合物，聚硅酸与Zn(上标 2+)反应并不是单纯的物理混合加成作用，而是形成了具有特殊结构的无机高分子的化学反应，这种新型絮凝剂所具有的优良絮凝特性是由各物质间以化学作用为主的物理化学因素共同作用的结果。

WO3, an interlayer compound prepared by J. W. Johnson (1981) using yellow tungstic oxide hydrate. Suspension of white powdery tungstic acid in anhydrous pyridine yields on standing for 2 wk whiteHW4O13.3H2O. IR and DTA studies revealed the connection between that pyridine polytungstate and white powdery tungstic acid (microcryst.), whose composition may thereby be assigned as H2W4O13.nH2O.

WO3。粉状白钨酸在无水吡啶中放置两周后可得到另一种化学式为(C5H5NH)HW4O13.3H2O的吡啶化合物，经IR和DTA研究可初步说明该化合物与粉状白钨酸之间的联系，并因此推测白钨酸的组成可能为H2W4O13.nH2O。

Two compounds have been isolated from hard coral Porites Compressa Dana,their structures were determined by IR,MS, HNMR, 13CNMR analysis.The two compounds are: batyl alcohol,(2) N-[l--2-hydroxyl--3,7-heptadecadienal]- h exadecanamide.

从采自西沙群岛的扁缩滨珊瑚中的石油醚部分分离出两个化合物，经IR、MS、~1HNMR、~(13)CNMR等波谱方法鉴定，其结构分别为(1)鲨肝醇，(2)N-1-羟基甲基-2-羟基--3，7-十七碳二烯基十六酸酰胺。

The effects of ethanol washing and water washing on structure, morphology and texture properties of pseudoboehmite-calcined γ-Al2O3 were comparatively studied with XRD, FT-IR,TG-DSC,TEM,BET and mercury porosimeter.

采用H2O2沉淀铝酸钠溶液和乙醇分散并洗涤沉淀相结合的方式成功地制备出了大孔容纳米γ-Al2O3纤维。

Our data were mainly generated from potentiometric titration, batch adsorption and FT-IR experiments.

研究中应用的主要实验方法有电位滴定法、分批吸附实验以及FT-IR测定等。

The rheological property of a bisphenol A cyanate resin was investigated by means of parallel plate method, it was modified by isothermal precure process. The effects of precure process on the chemical structure of resin were studied by IR, DSC and GPC methods.

本文采用平板法研究了一种双酚A型氰酸酯树脂的流变特性，通过恒温预固化的方法对其进行改性，并借助红外光谱、差示扫描量热法和凝胶渗透色谱法等手段分析了预固化对氰酸酯树脂化学结构的影响。

PACAP-immunoreactivity was demonstrated in preganglionic fibers, whereas only occasional PACAP-IR cell bodies could be observed.

有证明存在PACAP-免疫反应性的神经节前纤维，也可观察到PACAP-IL细胞体的存在。

GnRH-ir fibers distribute in the various brain region from the olfactory bulb to the cerebellum. They are especially abundant in the hypothalamus, the preoptic area and the ventral telecephalon. The immunopositive reaction in precocious fish is evidently stronger than that in unprecocious fish, and there is only very weak reaction in the gonadal undeveloped fish. The differences are most obvious in the hypothalamus, but not in other areas.

性早熟大黄鱼的神经内分泌细胞对GnRH抗血清的免疫阳性反应明显，无论在细胞的数量和免疫强度都比未早熟鱼多和强，在性腺尚未发育的幼鱼脑中仅有弱的免疫阳性，这种差异在下丘脑外侧结节核及视前核处最为明显，在其它GnRH阳性部位则差异不显著。

Nowadays, most of research are to build a transmutative Petri Nets through adding controlling place sets, controlling arc sets and controlling policy to the basic Petri Nets, while the Controlled Petri Nets could be used to argue many controlling theory problems conveniently and to induce many logically and physically supervisory and solve the Event Feedback Controlling Problems and State Feedback Controlling Problem in DEDS supervisory theory.

目前大多数的研究表现为在变形后的受控Petri网基础上，利用各种方法求得各种逻辑型、结构型控制器，解决DEDS监控理论中的事件反馈控制问题与状态反馈控制问题。

On one hand, there are discussions with the works council and union about extension of short time working up to the end of September.

一方面，有讨论，工程理事会和联盟关于延长工作时间短至9月底。