The Swelling of Latex

1934 ◽  
Vol 7 (3) ◽  
pp. 477-481
Author(s):  
F. Evers
Keyword(s):  
Solid Phase ◽  
Boundary Surface ◽  
The Other ◽  
Complex Composition ◽  
The Past ◽  
Adsorbed Protein ◽  
Other Hand ◽  
Long Time ◽  
Mutual Action

Abstract The swelling of solid substances is a phenomenon which has been known for a long time, and extended investigations have been made on its nature. On the other hand the title of the present work may appear to be incongruous, for there has been in the past no evidence that liquids have any tendency to swell. At least the mutual action of two liquids has been spoken of, not as a swelling, but only as a partial mixing, i. e., as an equilibrated dispersion. Nevertheless, under certain conditions latex undergoes actual swelling. A reference to the works of Hauser and of earlier investigators on the morphology and composition of latex will show that the colloidal condition of the solid phase of latex is responsible for its remarkable behavior with hydrocarbons. Latex represents a dispersion of rubber in a serum. The rubber, in the form of latex globules, is surrounded by a layer of adsorbed protein. Besides salts and sugars, the serum contains protein. This complex composition causes the remarkable phenomenon of swelling of latex with hydrocarbons. A few years ago the author dealt with this phenomenon in a brief way. In the present work a few observations on experiments on the swelling of latex are described. The results of the investigation show that swelling in ammoniacal latex depends upon the swelling of a layer of rubber in the boundary surface.

Exploring exploration: the role of affective states as forces that hinder change

2019 ◽  
Vol 29 (1) ◽  
pp. 207-223
Author(s):  
Stefano Brusoni ◽  
Daniella Laureiro-Martínez ◽  
Nicola Canessa ◽  
Maurizio Zollo
Keyword(s):  
Environmental Change ◽  
The Other ◽  
Affective States ◽  
Cognitive Sciences ◽  
The Past ◽  
Other Hand ◽  
Long Time ◽  
Tentative Evidence ◽  
Negative Affective States

Abstract In this article we argue that in order to understand failure or success in adapting to environmental change, we should better understand why people hesitate to pursue novel choices. This article asks: what forces hinder individuals’ exploration choices of different alternatives, and hence their ability to learn from them? To answer this question, this article looks to the cognitive sciences to identify a set of plausible mechanisms that hinder people’s tendency to explore. So far, “exploration” has been studied as a relatively monolithic behavior. Instead, we propose that exploration can be characterized in terms of some distinctive forces behind it. On one hand, agents experience “attachment” to choices that proved successful in the past, and hence comfort when sticking with them. On the other hand, they also experience concerns about less familiar options, as they lack knowledge about “distant” choices that have not been tried for a long time, or ever. We propose that high attachment is related to anxiety, and high distance to fear. Both these negative affective states hinder exploration. We find and discuss preliminary and tentative evidence of this effect.

‘Newness which never perishes’? Schoenberg’s ambivalent reception of Haydn

2010 ◽  
Vol 51 (1-2) ◽  
pp. 215-224
Author(s):  
Alexander Carpenter
Keyword(s):  
The Other ◽  
Major Influence ◽  
Musical Style ◽  
The Past ◽  
Other Hand ◽  
The Future ◽  
Music Tradition

This paper explores Arnold Schoenberg’s curious ambivalence towards Haydn. Schoenberg recognized Haydn as an important figure in the German serious music tradition, but never closely examined or clearly articulated Haydn’s influence and import on his own musical style and ethos, as he did with many other major composers. This paper argues that Schoenberg failed to explicitly recognize Haydn as a major influence because he saw Haydn as he saw himself, namely as a somewhat ungainly, paradoxical figure, with one foot in the past and one in the future. In his voluminous writings on music, Haydn is mentioned by Schoenberg far less frequently than Bach, Mozart, or Beethoven, and his music appears rarely as examples in Schoenberg’s theoretical texts. When Schoenberg does talk about Haydn’s music, he invokes — with tacit negativity — its accessibility, counterpoising it with more recondite music, such as Beethoven’s, or his own. On the other hand, Schoenberg also praises Haydn for his complex, irregular phrasing and harmonic exploration. Haydn thus appears in Schoenberg’s writings as a figure invested with ambivalence: a key member of the First Viennese triumvirate, but at the same time he is curiously phantasmal, and is accorded a peripheral place in Schoenberg’s version of the canon and his own musical genealogy.

Economic Performance and Public Finance in Kenya, 1960-2010

2018 ◽  
Vol 47 (2) ◽  
Author(s):  
Kempe Ronald Hope
Keyword(s):  
Public Finance ◽  
Economic Performance ◽  
Emerging Economy ◽  
The Other ◽  
Government Investment ◽  
The Past ◽  
Other Hand ◽  
Private Savings ◽  
Per Capita ◽  
Real Growth

Countries with positive per capita real growth are characterised by positive national savings—including government savings, increases in government investment, and strong increases in private savings and investment. On the other hand, countries with negative per capita real growth tend to be characterised by declines in savings and investment. During the past several decades, Kenya’s emerging economy has undergone many changes and economic performance has been epitomised by periods of stability, decline, or unevenness. This article discusses and analyses the record of economic performance and public finance in Kenya during the period 1960‒2010, as well as policies and other factors that have influenced that record in this emerging economy. 

Oxytocin analogues with non-coded amino acid residues in position 8: [8-Neopentylglycine]oxytocin and [8-cycloleucine]oxytocin

1987 ◽  
Vol 52 (9) ◽  
pp. 2317-2325 ◽  
Author(s):  
Jan Hlaváček ◽  
Jan Pospíšek ◽  
Jiřina Slaninová ◽  
Walter Y. Chan ◽  
Victor J. Hruby
Keyword(s):  
Amino Acid ◽  
Solid Phase Synthesis ◽  
Solid Phase ◽  
The Other ◽  
Amino Acid Residues ◽  
Phase Synthesis ◽  
Other Hand ◽  
Fragment Condensation

[8-Neopentylglycine]oxytocin (II) and [8-cycloleucine]oxytocin (III) were prepared by a combination of solid-phase synthesis and fragment condensation. Both analogues exhibited decreased uterotonic potency in vitro, each being about 15-30% that of oxytocin. Analogue II also displayed similarly decreased uterotonic potency in vivo and galactogogic potency. On the other hand, analogue III exhibited almost the same potency as oxytocin in the uterotonic assay in vivo and in the galactogogic assay.

Comparison of the Potency of 8-L-Arginine, 8-D-Arginine and 8-D-Homoarginine Vasopressin Analogs with Substituted Phenylalanine in Position 2

1994 ◽  
Vol 59 (6) ◽  
pp. 1439-1450 ◽  
Author(s):  
Miroslava Žertová ◽  
Jiřina Slaninová ◽  
Zdenko Procházka
Keyword(s):  
Amino Acid ◽  
Solid Phase Synthesis ◽  
Solid Phase ◽  
Basic Amino Acid ◽  
The Other ◽  
Side Chain ◽  
Inhibitory Potency ◽  
Phase Synthesis ◽  
Other Hand ◽  
Order Of Magnitude

An analysis of the uterotonic potencies of all analogs having substituted L- or D-tyrosine or -phenylalanine in position 2 and L-arginine, D-arginine or D-homoarginine in position 8 was made. The series of analogs already published was completed by the solid phase synthesis of ten new analogs having L- or D-Phe, L- or D-Phe(2-Et), L- or D-Phe(2,4,6-triMe) or D-Tyr(Me) in position 2 and either L- or D-arginine in position 8. All newly synthesized analogs were found to be uterotonic inhibitors. Deamination increases both the agonistic and antagonistic potency. In the case of phenylalanine analogs the change of configuration from L to D in position 2 enhances the uterotonic inhibition for more than 1 order of magnitude. The L to D change in position 8 enhances the inhibitory potency negligibly. Prolongation of the side chain of the D-basic amino acid in position 8 seems to decrease slightly the inhibitory potency if there is L-substituted amino acid in position 2. On the other hand there is a tendency to the increase of the inhibitory potency if there is D-substituted amino acid in position 2.

Did Ground Cover Change Over Geologic Time?

2000 ◽  
Vol 6 ◽  
pp. 171-182 ◽  
Author(s):  
Ben A. LePage ◽  
Hermann W. Pfefferkorn
Keyword(s):  
Fossil Record ◽  
Ground Cover ◽  
The Other ◽  
Detailed Account ◽  
Geologic Time ◽  
The Past ◽  
Other Hand ◽  
Plant Fossil

When one hears the term “ground cover,” one immediately thinks of “grasses.” This perception is so deep-seated that paleobotanists even have been overheard to proclaim that “there was no ground cover before grasses.” Today grasses are so predominant in many environments that this perception is perpetuated easily. On the other hand, it is difficult to imagine the absence or lack of ground cover prior to the mid-Tertiary. We tested the hypothesis that different forms of ground cover existed in the past against examples from the Recent and the fossil record (Table 1). The Recent data were obtained from a large number of sources including those in the ecological, horticultural, and microbiological literature. Other data were derived from our knowledge of Precambrian life, sedimentology and paleosols, and the plant fossil record, especially in situ floras and fossil “monocultures.” Some of the data are original observations, but many others are from the literature. A detailed account of these results will be presented elsewhere (Pfefferkorn and LePage, in preparation).

The Christian Church in the Last Seventy Years

1943 ◽  
Vol 12 (1) ◽  
pp. 28-34
Author(s):  
Kenneth Scott Latourette
Keyword(s):  
Large Volume ◽  
The Other ◽  
Recent History ◽  
Christian Church ◽  
The Past ◽  
Other Hand ◽  
The Status ◽  
The One ◽  
The Church

A strange contrast exists in the status of the Christian Church in the past seventy years. On the one hand the Church has clearly lost some of the ground which once appeared to be safely within its possession. On the other hand it has become more widely spread geographically and, when all mankind is taken into consideration, more influential in shaping human affairs than ever before in its history. In a paper as brief as this must of necessity be, space can be had only for the sketching of the broad outlines of this paradox and for suggesting a reason for it. If details were to be given, a large volume would be required. Perhaps, however, we can hope to do enough to point out one of the most provocative and important set of movements in recent history.

The dialectic between global and local perspectives in archaeological theory, heritage and publications

2008 ◽  
Vol 15 (1) ◽  
pp. 56-69 ◽  
Author(s):  
Kristian Kristiansen
Keyword(s):  
Annual Meeting ◽  
The Other ◽  
Archaeological Theory ◽  
Common Trends ◽  
Archaeological Practice ◽  
The Past ◽  
Other Hand ◽  
Legislative Framework ◽  
Global And Local ◽  
Local Perspectives

When I agreed to present the article as a vehicle for discussion at a session at the EAA's annual meeting in Zadar, Croatia, I decided to approach the question of a European archaeology from what I considered to be the three organizing pillars of archaeological practice: heritage, theory and publications. Heritage is the dominant organizational/legislative framework for archaeological practice, and it is where most of the money is spent. Theory, on the other hand, organizes most of our interpretations of the past, while publications are still the most common way of presenting the results of both heritage work (mostly excavations) and interpretations of that work. In this way I hoped to have encircled the dominant parameters for a diagnosis of the archaeological landscapes in Europe. I assumed that there might be some correlation between the three, and that such observed common trends within two or more variables would strengthen the argument, to paraphrase processual jargon.

Comparing the Meaningfulness of Finite and Infinite Lives: Can We Reap What We Sow if We Are Immortal?

2021 ◽  
Vol 90 ◽  
pp. 105-123
Author(s):  
Thaddeus Metz
Keyword(s):  
Natural World ◽  
The Other ◽  
Meaningful Life ◽  
The Past ◽  
William Lane Craig ◽  
Other Hand ◽  
Important Argument ◽  
Moral Choices ◽  
The One

AbstractOn the rise over the past 20 years has been ‘moderate supernaturalism’, the view that while a meaningful life is possible in a world without God or a soul, a much greater meaning would be possible only in a world with them. William Lane Craig can be read as providing an important argument for a version of this view, according to which only with God and a soul could our lives have an eternal, as opposed to temporally limited, significance since we would then be held accountable for our decisions affecting others’ lives. I present two major objections to this position. On the one hand, I contend that if God existed and we had souls that lived forever, then, in fact, all our lives would turn out the same. On the other hand, I maintain that, if this objection is wrong, so that our moral choices would indeed make an ultimate difference and thereby confer an eternal significance on our lives (only) in a supernatural realm, then Craig could not capture the view, aptly held by moderate supernaturalists, that a meaningful life is possible in a purely natural world.

Баллада в калмыцкой поэзии ХХ в. (Ц. Леджинов, С. Байдыев)

2020 ◽  
Vol 15 (3) ◽  
pp. 264-277
Author(s):  
Rimma M. Khaninova ◽  
Keyword(s):  
Russian Translation ◽  
Semantic Context ◽  
The Other ◽  
Past Century ◽  
Original Text ◽  
The Past ◽  
Other Hand

The article discusses ballads of the Kalmyk poets Tseren Ledzhinov “Бальчгин туск баллад” (“A Ballad about the Mud”, 1941) and Sanzhar Baidyev «Башмгудин туск баллад» (“A Ballad about Boots”, 1967). The analysis of the two ballads in the original showed that neither the content nor the form of Ledzhinov’s poem fits the announced genre. The poem by Baidyev, on the other hand, is one of the interesting ballads of the Kalmyk poetry of the past century, it is experimental in terms of the plot and the characters. The original text of S. Badyev’s work is compared to its Russian translation “Boots” translated by D. Dolinsky and V. Strelkov. The comparison revealed that the author’s conception and manifestation were altered by the translators in the aspect of semantic context and genre identity.

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