Biologically Active Compounds. II. The Synthesis of β-CarboxY-γ-butyrolactone Derivatives

Amide derivatives of γ-substituted paraconic and aconic　acids have been　synthesized. Ultraviolet spectra of the aconic acid derivatives showed characteristic　fine structure in the region of 245 to 280 mμ

STUDIES ON THE SENESCENCE OF THE COCK SPERMATOZOA DURING STRAGE.

ArticleJOURNAL OF THE FACULTY OF TEXTILE SCIENCE AND TECHNOLOGY, SHINSHU UNIVERSITY. SERIES. E, AGRICULTURE AND SERICULTURE 6: 1-55(1962)departmental bulletin pape

Behaviour and Phytoavailability of Radiocaesium in Surface Soil

Symposium Pape

Mineralogical study of some Antarctic monomict eucrites including Yamato-74356: A unique rock containing recrystallized clastic matrix

We studied the thermal and impact history of four Yamato Antarctic monomict eucrites, Yamato (Y)-74356,Y-791186,Y-792510,and Y-82037,by mineralogical techniques. Although the mineral chemistry of Y-74356 is typical of monomict eucrites, it contains a recrystallized clastic matrix similar to that of some lunar granulitic breccias. Y-74356 experienced shock brecciation during a major thermal event. In contrast, Y-791186 and Y-792510 have pyroxenes of the highest metamorphic degree but the clastic matrices are weakly recrystallized, i. e., these two rocks were not extensively metamorphosed after breccia assembly. This indicates that the process that caused brecciation is distinct from the major thermal event. Y-82037 is a coarse-grained, unbrecciated ordinary eucrite, indicating that it was not affected by the brecciation event, except for the presence of a granoblastic portion in part of the pyroxene crystals. We deduce that the thermal metamorphism that formed ordinary eucrites took place on a longer time scale and at a lower temperature than that which formed some lunar granulitic breccias. The precursors of these ordinary eucrites have suffered from smaller scale brecciation events than those of the lunar granulitic breccias (metamorphic polymict breccias). It is unlikely that there were comparably large cratering events on the small HED parent body to cause the strong thermal metamorphism. The thermal events may have taken place at a very early stage of the evolution of the primary crust of the HED parent body

Mineralogical study of some brecciated Antarctic eucrites

In order to obtain better understanding of the entire range of Antarctic brecciated eucrites and impact and thermal history of the HED-parent body, we studied brecciated Antarctic eucrites : Y-82202,Y-82210,Y-793548,and Y-793570 mineralogically and petrographically. Y-793548,Y-82210,and Y-793570 are nearly monomict breccias with clasts components of rapidly cooled materials and minor slowly cooled pyroxenes (e. g., Juvinastype). Y-82202 is a monomict breccia penetrated by glassy shock melt veins. We suggest that the polished thin sections of the five eucrites presently available belong to a single suite which contains mostly quickly cooled varieties of eucrites similar to those in Pasamonte or in the Y-74159-type polymict eucrites, but more slowly cooled varieties such as ordinary eucrites or cumulate eucrites are scarce in these sections. On the basis of geological setting of HED parent body, we envision that these eucrites may have been located in the shallow ejecta blanket of the HED-parent body, judging from the high mixing ratio of unequilibrated clasts and low degree of equilibration of pyroxene