The alkaloids of Senecio jacobaea L: The structures of the Alkaloids and the Necic Acids

1959 ◽  
Vol 12 (2) ◽  
pp. 247 ◽  
Author(s):  
TA Geissman
Keyword(s):  
Degradation Products ◽  
Senecio Jacobaea ◽  
Recorded Data ◽  
New Evidence

Based on a reinterpretation of previously recorded data together with some new evidence, structures VII, IX, XIX, X, and XI have been derived for jacobine, jaconine, jacoline, jaconecic acid, and isojaconecic acid, respectively. The structures of some degradation products of the alkaloids have been clarified.

Threshold silt content dependency on particle morphology (shape and size) of granular materials: review with new evidence

2021 ◽  
Vol 18 (1) ◽  
pp. 28-40
Author(s):  
Abdellah Cherif Taiba ◽  
Youcef Mahmoudi ◽  
Wiebke Baille ◽  
Torsten Wichtmann ◽  
Mostefa Belkhatir
Keyword(s):  
Packing Density ◽  
Mechanical Response ◽  
Particle Morphology ◽  
Silt Content ◽  
Granular Assemblies ◽  
Theoretical Approaches ◽  
Particle Characteristics ◽  
Recorded Data ◽  
New Evidence ◽  
Shape And Size

The threshold silt content is well known as a key parameter affecting the mechanical response of binary granular assemblies considering particle characteristics (size and shape). In this context, the threshold silt content (TSC) is determined from different laboratory tests based on packing density response (emax and emin versus silt content «Sc») and theoretical approaches proposed by several researchers in the specialized published literature using the characteristics of host sand and silt [emax(sand), emin(sand) , emax(silt) , emin(silt) , Gs , Gf and x]. The analysis of the recorded data indicates that the TSC derived from the (emax) curve appears more reliable than that obtained from the (emin) one. Moreover, it is found that the proposed analytical methods are suitable to quantify the threshold silt content (TSC) than that determined experimentally using the packing density (emax and emin). In addition, the test results show that the new introduced ratios [(D50s×As)/(D50f×Af)] and [(Cus×As)/(Cuf×Af)] determined based on particle characteristics (shape and size) appear as appropriate parameters for predicting the threshold silt content (TSC) of sand-silt mixture of the compiled data from the published literature as well as that of the present research related to Chlef sand, Fontainebleau sand and Hostun sand mixed with Chlef silt.

Effect of PE Film Degradation Products on the Carbon Dioxide Content of Soil: A Mathematical Study

2012 ◽  
Vol 724 ◽  
pp. 85-88
Author(s):  
Ji Liang Wu ◽  
Xue Gang Luo ◽  
Hong Ping Zhang ◽  
Xiao Yan Lin
Keyword(s):  
Carbon Dioxide ◽  
Molecular Weight ◽  
Clay Soil ◽  
Degradation Products ◽  
Control Group ◽  
Carbon Dioxide Content ◽  
Small Molecular Weight ◽  
Plastic Films ◽  
Loam Soil ◽  
Recorded Data

The increasing use of the PE plastic film means increasing problems of the soil environmental destroy. In order to investigate the effect of PE film degradation products on the carbon dioxide content of soil, degradation products of the PE film with different molecular weight were added in three kinds of soil respectively, and corns were cultivated in the soil. FTIR gas checkout equipment was utilized to monitor changes of the carbon dioxide content of the different soil. A Mathematical model was built with the recorded data to depict variation of the carbon dioxide content. The results showed that the CO2 content is high in the sandy soil with degradation products of PE plastic films (molecular weight of 5000 Da) . It is also high in the clay soil and loam soil with degradation products of PE (molecular weight of 2000 Da). Compared to the control group (LLDPE), it can be found that small molecular weight PE plastic films have a greater effect on the CO2 content. Thus, it is deduced that small molecular weight PE plastic films are degradable in the soil.

Systematic effects in observed parallaxes

1978 ◽  
Vol 48 ◽  
pp. 31-35
Author(s):  
R. B. Hanson
Keyword(s):  
Error Estimates ◽  
Zero Point ◽  
Absolute Zero ◽  
Apparent Magnitude ◽  
Coherent System ◽  
Preliminary Results ◽  
General Catalogue ◽  
Systematic Effects ◽  
New Evidence ◽  
Right Ascension

Several outstanding problems affecting the existing parallaxes should be resolved to form a coherent system for the new General Catalogue proposed by van Altena, as well as to improve luminosity calibrations and other parallax applications. Lutz has reviewed several of these problems, such as: (A) systematic differences between observatories, (B) external error estimates, (C) the absolute zero point, and (D) systematic observational effects (in right ascension, declination, apparent magnitude, etc.). Here we explore the use of cluster and spectroscopic parallaxes, and the distributions of observed parallaxes, to bring new evidence to bear on these classic problems. Several preliminary results have been obtained.

MERLIN Finds New Evidence of Ranolazine Safety

2007 ◽  
Vol 40 (9) ◽  
pp. 36
Author(s):  
BRUCE JANCIN
Keyword(s):  
New Evidence

Collagen degradation products modulate matrix metalloproteinase expression in cultured articular chondrocytes

2005 ◽  
Vol 24 (1) ◽  
pp. 63-70 ◽  
Author(s):  
M. Fichter ◽  
U. Körner ◽  
J. Schömburg ◽  
L. Jennings ◽  
A. A. Cole ◽  
...  
Keyword(s):  
Matrix Metalloproteinase ◽  
Articular Chondrocytes ◽  
Degradation Products ◽  
Collagen Degradation ◽  
Collagen Degradation Products

Vaccination for travellers – new evidence and recommendations

2001 ◽  
Vol 58 (6) ◽  
pp. 362-366 ◽  
Author(s):  
Matius P. Stürchler ◽  
R. P. Steffen
Keyword(s):  
Hepatitis B ◽  
Hepatitis A ◽  
New Evidence

Impfungen sind einfache und effektive Maßnahmen zur Verhinderung von Reisekrankheiten. Compliance-Probleme sind gering, da alle Impfungen noch vor Abreise verabreicht werden und bei manchen Impfungen nur eine Dosis für den zuverlässigen Schutz nötig ist. Für jeden Reisenden sind die Hepatitis A- und die Diphtherie-Tetanus-Impfung empfohlen, für Asien und Afrika auch die Polioimpfung. Bei Reisen >30 Tagen, jüngeren Personen und Reisenden mit Risikoverhalten sollte immer auch eine Hepatitis B-Impfung, eventuell als Kombination mit Hepatitis A in Betracht gezogen werden. Je nach Reisestil, -destination und -dauer können auch weitere Impfungen wie z.B. die Typhus-, Tollwut-, Zeckenenzephalitis-, Grippe-, Masern-Mumps-Röteln-, Gelbfieber-, Meningokokkenmeningitis- und die Japanische Enzephalitis-Impfung in Frage kommen. Mehrere Impfungen können gleichzeitig verabreicht werden – eine Staffelung ist nicht nötig. i BAG Supplementum VI, Stand Juli 2000 «Impfungen für Auslandreisende»; http://www.admin.ch/bag/infekt/prev/reisemed/index.htm; Safetravel http://www.safetravel.ch; Tropimed

Strategic control of a time criterion in naming: New evidence and effects

1997 ◽  
Author(s):  
Stephen J. Lupker ◽  
Tamsen E. Taylor ◽  
Penny M. Pexman
Keyword(s):  
Strategic Control ◽  
Time Criterion ◽  
New Evidence
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