Tissue burden evaluation of elongated mineral particles in two individuals with mesothelioma and whose work history included manufacturing tile

2020 ◽  
Vol 44 (1) ◽  
pp. 17-31
Author(s):  
Ronald F. Dodson ◽  
Lee W. Poye
Author(s):  
G. M. Brown ◽  
D. F. Brown ◽  
J. H. Butler

The term “gel”, in the jargon of the plastics film industry, may refer to any inclusion that produces a visible artifact in a polymeric film. Although they can occur in any plastic product, gels are a principle concern in films where they detract from the cosmetic appearance of the product and may compromise its mechanical strength by acting as local stress concentrators. Many film gels are small spheres or ellipsoids less than one millimeter in diameter whereas other gels are fusiform-shaped and may reach several centimeters in length. The actual composition of gel inclusions may vary from miscellaneous inorganics (i.e. glass and mineral particles) and processing additives to heavily oxidized, charred or crosslinked polymer. The most commonly observed gels contain polymer differing from the bulk of the sample in its melt viscosity, density or molecular weight.Polymeric gels are a special concern in polyethylene films. Over the years and with the examination of a variety of these samples three predominant polymeric species have been observed: density gels which have different crystallinity than the film; melt-index gels in which the molecular weight is different than the film and crosslinked gels which are comprised of crosslinked polyethylene.


Author(s):  
Karen A. Katrinak ◽  
James R. Anderson ◽  
Peter R. Buseck

Aerosol samples were collected in Phoenix, Arizona on eleven dates between July 1989 and April 1990. Elemental compositions were determined for approximately 1000 particles per sample using an electron microprobe with an energy-dispersive x-ray spectrometer. Fine-fraction samples (particle cut size of 1 to 2 μm) were analyzed for each date; coarse-fraction samples were also analyzed for four of the dates.The data were reduced using multivariate statistical methods. Cluster analysis was first used to define 35 particle types. 81% of all fine-fraction particles and 84% of the coarse-fraction particles were assigned to these types, which include mineral, metal-rich, sulfur-rich, and salt categories. "Zero-count" particles, consisting entirely of elements lighter than Na, constitute an additional category and dominate the fine fraction, reflecting the importance of anthropogenic air pollutants such as those emitted by motor vehicles. Si- and Ca-rich mineral particles dominate the coarse fraction and are also numerous in the fine fraction.


2020 ◽  
Vol 2 (3) ◽  
pp. 192-197
Author(s):  
Sevinch Eshonkulova ◽  

This article is dedicated to Alisher Navoi's "History of the Prophet and the Ruler", which depicts the faith, patience and high qualities of the prophets in art. The article analyzes and interprets universal values, issues of faith, issues of good and evil, as well as the narration of the history of the prophets -the continents of the byte, rubai andfour verses at the end of these stories. The work "History of the Prophet and the Ruler" shows that the flower of literature is a masterpiece of spirituality and art


2000 ◽  
Vol 15 (2) ◽  
pp. 88-97 ◽  
Author(s):  
Lars Järnström ◽  
Magnus Wikström ◽  
Mikael Rigdahl
Keyword(s):  

2002 ◽  
Vol 65 (16) ◽  
pp. 1109-1120 ◽  
Author(s):  
Ronald F. Dodson ◽  
Marion G. Williams ◽  
Joseph D. Satterley
Keyword(s):  

2021 ◽  
Vol 773 (1) ◽  
pp. 012088
Author(s):  
IA Matveev ◽  
BV Yakovlev ◽  
NG Eremeeva ◽  
TP Kulichkina

2010 ◽  
Vol 40 (1) ◽  
pp. 41-69 ◽  
Author(s):  
TOM SEFTON ◽  
MARIA EVANDROU ◽  
JANE FALKINGHAM

AbstractThis article examines the relationship between the family and work histories of older women and their personal incomes in later life, using retrospective data from the first 15 waves of the British Household Panel Survey. The association between women's family histories and their incomes later in life are relatively weak, explaining only a small proportion of the overall variation in older women's incomes. Divorce, early widowhood and re-marriage are not associated with any significant differences in older women's incomes, while motherhood is only associated with a small reduction in incomes later in life. While there are significant differences in the work histories of older women with different family histories, this translates into relatively small differences in their personal incomes, because the types of employment career pursued by most women are not associated with significantly higher retirement incomes and because public transfers dampen work history-related differentials, especially for widows. On the one hand, this could be seen as a positive finding in that the ‘pension penalty’ associated with life-course events such as motherhood and divorce is not as severe as often anticipated. On the other hand, the main reason for this is that the pension returns to working longer are relatively low, particularly for women with few qualifications. The analysis suggests that women retiring over the next two decades are unlikely to benefit significantly from the additional years they have spent in employment, because most of this increase has been in part-time employment. The article highlights the tensions between two objectives: rewarding work, and protecting the most vulnerable, such as carers, long-term disabled and unemployed. Resolving this dilemma involves moving away from a close association between pension entitlements and work history and towards universal entitlement based on a citizen's pension.


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