Transition of Ultrathick Polyamide Tubes into Vesicles with Great Stability

2020 ◽  
pp. 2000481
Author(s):  
Lipeng Wang ◽  
Qing Zhu ◽  
Yongping Bai
Keyword(s):  
Res Publica ◽  
1970 ◽  
Vol 19 (3) ◽  
pp. 495-513
Author(s):  
William Fraeys

The Parliamentary Elections of 17 April 1977 revealed a great stability of the body of electors and largely confirmed the result of the communal elections of 1976. On the 393 seats in Parliament (House of Representatives and Senate), only 38 went to another political family.Nevertheless, this stability does not exclude movements; in this context should be noted the severe set-back of the «Rassemblement Wallon» which looses nearly half of its voters. lts defeat principally benefits the Liberals and the Christian Democrats and, to a lesser extent, the Socialists.  In the Flemish region, the Socialists strengthen their position, whereas the Christian Democrats gain ground. Unexpected is the Liberals's setback.  The «Volksunie» slightly recedes.In Brussels, PDF is undeniably successful and even exceeds its 1971 result. Communists are losing ground all over the country.In these elections which have been characterized by rather limited vote variations, the «communal tickets» (i.e. those based upon a single cultural group) recede, on the whole, to the benefit of the traditional parties which received a serious blow in 1971, but showed signs of a recovery as soon as 1974.


Res Publica ◽  
1988 ◽  
Vol 30 (1) ◽  
pp. 3-24
Author(s):  
William Fraeys

Organized only two years after the previous genera! elections, the 1987 poll, characterized by a great stability of the electorale, wilt probably have a deep political impact on the country's future.If the rate of external mobility suitably gauges the extent of the citizens' shifts in votes, the 1987 elections will have ranged among the four most stable general elections out of the twenty-two that have taken place since universal suffrage has been introduced. And yet, because of the decline of the outgoing coalition, on the one hand, which is mainly due to the loss suffered by the CVP, and because of the change of majority within the Walloon Regional Council and the French-speaking Community Council, on the other, the political situation appears very different after the 13th December 1987 elections. The observer can only be struck by the asymmetrical behaviour of the voters in the northern and southern parts of the country. In Flanders, the main party is on the decline white all other parties are winning votes.However, everything seems to show that the motivation of the voters who did not vote twice for the same party in 1985 and 1987, but who, as we said, are not very numerous, was an economic and social motivationrather than a language or community-related one. The gains of Agalev, the PVV and the SP in the face of the Volksunie's status quo cannot be explained otherwise. The gains of the Vlaams Blok, notably in Antwerp, are probably due to social (attitude towards immigrants) rather than community-linked motivations too. In the W alloon Region, on the contrary, the main party is registering an obvious gain, white the other parties are declining or stagnating. In this case, the motivations seem to be numerous : they have a social and economic background on the part of voters who trusted the main opposition party, but they are also community linked and inspired by considerations that have to do with the relationships between the Walloon and Flemish people in the Belgian State under transformation.The political prospects then appear uncertain. This is even more true that two other elections are to take place in the next eighteen months.These concern the opposite levels of the elected Assemblies: the municipal Council and the European Parliament.


Polymers ◽  
2019 ◽  
Vol 11 (12) ◽  
pp. 2108
Author(s):  
Robert Texidó ◽  
Salvador Borrós

In this paper, we report a one-step method to obtain conductive polypyrrole thin films on flexible substrates. To do this, substrates were modified through allylamine plasma grafting to create a high amount of reactive amine groups on PDMS surface. These groups are used during polypyrrole particle synthesis as anchoring points to immobilize the polymeric chains on the substrate during polymerization. Surface morphology of polypyrrole thin films are modified, tailoring the polyelectrolyte used in the polypyrrole synthesis obtaining different shapes of nanoparticles that conform to the film. Depending on the polyelectrolyte molecular weight, the shape of polypyrrole particles go from globular (500 nm diameter) to a more constructed and elongated shape. The films obtained with this methodology reflected great stability under simple bending as well as good conductivity values (between 2.2 ± 0.7 S/m to 5.6 ± 0.2 S/cm).


2019 ◽  
Vol 55 (5) ◽  
pp. 1872-1880 ◽  
Author(s):  
Simin Feng ◽  
Yuxin Sun ◽  
Pei Wang ◽  
Peilong Sun ◽  
Christos Ritzoulis ◽  
...  

1971 ◽  
Vol 29 (3_suppl) ◽  
pp. 1313-1314 ◽  
Author(s):  
Michael Dinoff ◽  
G. E. Taylor ◽  
Robert Lyman ◽  
Richard Reynolds

12 chronic schizophrenics and 12 chronic organic patients were tested twice on a standardized video-tape interview, with a 1-wk. interval between tests. Each of the resulting group means, except latency, indicated great stability over time for both groups but because of high across S variability, nosological trends seem reduced.


1891 ◽  
Vol 17 ◽  
pp. 382-384
Author(s):  
E. A. Letts ◽  
R. F. Blake

In the phosphines and their derivatives, which we have investigated from, time to time, considerable uncertainty has always attended the determinations of phosphorus by the ordinary methods recommended for the purpose. In fact, we never felt any confidence in the result, for no matter how carefully the determinations were made, duplicate analyses led to different numbers.The uncertainty depends partly upon the difficulty of oxidising the phosphorus in such compounds to phosphoric acid. For, as a rule, in any dry combustion process which may be employed, volatile oxidation products, containing phosphorus, are formed of great stability, which frequently pass over the red-hot oxidising mixture almost unchanged. Moreover, the glass of the tube is attacked by the oxidising mixture, and this undoubtedly leads to inaccuracies, probably of considerable magnitude.


Author(s):  
Andrew Bogdan ◽  
D Tyler McQuade

We demonstrate the preparation and characterization of a simplified packed-bed microreactor using an immobilized TEMPO catalyst shown to oxidize primary and secondary alcohols via the biphasic Anelli-Montanari protocol. Oxidations occurred in high yields with great stability over time. We observed that plugs of aqueous oxidant and organic alcohol entered the reactor as plugs but merged into an emulsion on the packed-bed. The emulsion coalesced into larger plugs upon exiting the reactor, leaving the organic product separate from the aqueous by-products. Furthermore, the microreactor oxidized a wide range of alcohols and remained active in excess of 100 trials without showing any loss of catalytic activity.


1994 ◽  
Vol 19 (2) ◽  
pp. 131-147 ◽  
Author(s):  
Jitka Rychtaříková

During the past two decades most of the developed countries of Europe have witnessed changes in such family-related demographic phenomena as nuptiality, divorce, and fertility. For the time being, the Czech and Slovak Republics continue to exhibit patterns established earlier in history. Marriage is universal and is contracted at young ages. Children are born to young parents and at short childbirth intervals. The proportion of childless women is below ten percent, which is comparatively low. The eight percent of children born out of wedlock is comparatively low by European standards. Longitudinal indicators are characterized by great stability. As a result of recent profound political, social, and economic changes, it is reasonable to expect changes in demographic behavior as well. The first of these may be a marked decline in fertility along the lines already experienced by southern European countries.


2015 ◽  
Vol 89 (2) ◽  
pp. 195-221 ◽  
Author(s):  
Andrea Jiménez-Sánchez ◽  
Enmanuelle Vennin ◽  
Enrique Villas

AbstractA study of the Upper Ordovician trepostomate bryozoans belonging to the families Amplexoporidae and Monticuliporidae, from the eastern Anti-Atlas of Morocco, is presented here. They occur in the marly to fine-grained limestone, intermediate unit of the Khabt-el-Hajar Formation, late Katian in age, representing outer-ramp depositional environments. They inhabited the highest paleolatitude known for a bryozoan fauna during the Ordovician, estimated at more than 65–70ºS. A total of 11 species of the generaAnaphragma,Atactoporella,Homotrypa,Monotrypa,Monticulipora, andPrasoporaare described. Three species are already known from the equatorial-tropical paleocontinents of Baltica, Laurentia, and Siberia:Anaphragma mirabile,Monotrypa jewensis, andPrasopora falesi. Four new taxa are described:Anaphragma undulata,Atactoporella moroccoensis,Monticulipora globulata, andMonticulipora irregularis.The two species ofAnaphragmaand the one ofAtactoporelladisplay significantly larger zoarial sizes than congeneric species, representing gigantism among bryozoans. Polar gigantism is rejected for the two species ofAnaphragmaas is gigantism related to photosynthetic endosymbionts. An alternative proposal for their giant size is their long zoarial life span due to their well-balanced, robust branching form, with a relatively wide basal supporting surface, adapted to unconsolidated substrates in environments below wave base. Their great stability in outer-ramp environments, with infrequent storms, would allow the zoaria to grow for an extended time and reach large sizes before being overturned and buried.Atactoporella moroccoensis, has both zoaria and zooecia gigantic, suggesting a hypothesis of polar gigantism.


2017 ◽  
Vol 2017 ◽  
pp. 1-8 ◽  
Author(s):  
Li Yumei ◽  
Li Yamei ◽  
Li Qiang ◽  
Bao Jie

Silver nanoparticles (AgNPs) were rapidly synthesized using an exopolysaccharide from Arthrobacter sp. B4 (B4-EPS). The optimum condition for AgNPs synthesis was under the concentration of 5 g/L B4-EPS and 1 mM AgNO3 at 80°C between pH 7.0 and 8.0. The resulting AgNPs displayed a face-centred-cubic structure with the size range from 9 nm to 72 nm. Further analysis showed that flocculation and reduction of B4-EPS played a pivotal role in the formation of AgNPs. Furthermore, these nanoparticles exhibited great stability, excellent antimicrobial activity, and low phytotoxicity. The aforementioned data provide a feasible and efficient approach for green synthesis of AgNPs using microbial polysaccharides with flocculation and reduction activity, which will be promising in medical filed.


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