Toxic substances produced byFusarium VI. Anti-F. oxysporum f. sp.carthami effect of 2,2′,4-trihydroxybenzophenone

Summary Anti-Fusarium oxysporum f. sp.carthami activity of 2,2,4-tri-hydroxybenzophenone was evaluated. Pretreatment with the benzophenone offered complete protection to safflower seeds and seedlings, and recovery of the latter from the fungal infection.     

X.85、X.86和城域网多业务环X.msr

本文主要介绍武汉邮科院代表信息产业倍在电联SG17最近几年所提出的三个技术标准X．85（IP over SDH using LPAS)、X．86(Ethernet over LPAS)和城域网多业务环X.msr，以及芯片、设备开发和应用的情况。     

Über die Alkaloide vonAspidosperma discolor A. DC.

Summary From the root-bark ofAspidosperma discolor A.DC., reserpiline, isoreserpiline and isoreserpiline--indoxyl have been isolated as well as two new methoxyindole alkaloids (AD IV and AD VI), which have been partially characterised.     

The early years of the Lycée and the Lycée des Arts. A chapter in the lives of A. L. Lavoisier and A. F. de Fourcroy

The first professors at the newly-established London University (later University College London) were appointed in 1827, but a chair in geology was not created there until 1841. In the intervening years, teaching in geology and palaeontology was included in other natural science courses. Early in 1831, John Phillips, keeper of the Yorkshire Museum at York, was prompted to give a formal course of geological lectures and subsequently he was informally offered the professorship, which he declined.     

L'incompatibilité dansOenothera Serralata Nutt.

Zusammenfassung BeiOenothera serrulata Nutt., einer diploïden Art onhe Katenation, wird Inkompatibilität (Selbststerilität) fest-gestellt. Aufgeklärt wird der Vererbungsmechanismus — eine Serie von Oppositionsallelen in einem LocusS —, welcher mit dem in der GattungOenothera schon bekannten identisch ist.     

In Memoriam Pau Hoffmann 1. Juli 1884-9. März 1962

Ohne Zusammenfassung

---

In Memoriam Pau Hoffmann 1. Juli 1884-9. März 1962

     

Molekül-Massenspektrographie von Naturstoffen. Steroide

Summary The molecular weight of various steroids (sterols, steroidal sapogenins, and alkaloids) as well as the molecular weight distribution in complex mixtures of similar steroids, has been exactly determined by application of molecule mass spectrography. In this technique, negatively-charged (p – 1) ions are formed, usually without further fragmentation. The advantages and new possibilities of this method are discussed.

---

---

I. Mitteilung.     

La question des hétérochromosomes chez les Sauropsidés. I. Reptiles

Summary In contradiction to some Japanese authors (Oguma, Makino, Nakamura), we are unable to find any difference in the chromosome sets of the male and female ofLacerta vivipara (2N = 36). In a saurian, where the analysis is very easy (Chamaeleon bitaeniatus), there are, without the smallest doubt, 24 chromosomes in both sexes (20M + 4m). The evidence of a female heterogamety in turtles is by no means satisfying.     

Georg Agricola (1494–1555) Zum 400. Gedenktag seines Todes am 21. November 1955

Ohne Zusammenfassung     

Über die Alkaloide vonRauwolfia ligustrina R. & S. Raugustin,ein neues reserpinähnliches Alkaloid

Summary Twenty-one alkaloids have been identified from the root ofRauwolfia ligustrina R. & S. The more important ones are reserpine, pseudoreserpine and raugustine, a new base which is isomer to pseudoreserpine. The structure of the latter compound is discussed.

---

---

Mitteilung über Rauwolfia-Alkaloide

---

Mitteilung sieheC. F. Huebner undE. Schlittler, J. Amer. chem. Soc.79, 250 (1957).     

Sertoli cells of adult rats in vitro. II. Effect of different steroid precursors on estradiol 17β-synthesis

Summary The estradiol 17-synthesis by ⁴ pathway has been studied in homogenous cultures of Sertoli cells isolated from adult rat testes. The data reported clearly demonstrate that progesterone, androstenedione, testosterone and estrone induce an increase of the estradiol 17-production.This work was partially supported by grants No. 77.01322.04 and No. 77.01958.04 from the Consiglio Nazionale delle Ricerche.The excellent technical assistance of Antonio Muller and Massimo Rosati is deeply appreciated.     

Chemistry in Rozier's Journal.—VI and VII

In 1783 John Michell published a note entitled ‘On the Means of Discovering the Distance, Magnitude etc. of the Fixed Stars, in Consequence of the Diminution of the Velocity of their Light’, but it was Christian Doppler who in 1842 for the first time formulated the principle (now generally known by his name): If a source of sound or light is in motion relative to an observer, or an observer in motion relative to a source, the period of the waves received by the observer will be different from the period of the waves emitted by the source. The acoustical Doppler principle was verified in 1845 by Buys-Ballot's experiments and by Ernst Mach (in the laboratory, using a Rotationsapparat (1860)). H. Fizeau proposed to verify the optical Doppler principle by measuring the shift of lines in the spectra of stars (1848). This was carried out by William Huggins (1868 ff.), and H. C. Vogel and led to exact results in 1892. The Doppler effect with canal rays was shown by Johannes Stark in 1905.