scholarly journals Polyphenoloxidase Silencing Affects Latex Coagulation in Taraxacum Species

2009 ◽  
Vol 151 (1) ◽  
pp. 334-346 ◽  
Author(s):  
Daniela Wahler ◽  
Christian Schulze Gronover ◽  
Carolin Richter ◽  
Florence Foucu ◽  
Richard M. Twyman ◽  
...  
Keyword(s):  
Latex Coagulation

A role for a Hevea latex lectin-like protein in mediating rubber particle aggregation and latex coagulation

2008 ◽  
Vol 69 (2) ◽  
pp. 339-347 ◽  
Author(s):  
Rapepun Wititsuwannakul ◽  
Piyaporn Pasitkul ◽  
Kamonwan Kanokwiroon ◽  
Dhirayos Wititsuwannakul
Keyword(s):  
Rubber Particle ◽  
Particle Aggregation ◽  
Latex Coagulation

The Coagulation Mechanism of Butadiene—Styrene Latex

1959 ◽  
Vol 32 (2) ◽  
pp. 531-535 ◽  
Author(s):  
S. A. Glikman ◽  
E. P. Korchagina
Keyword(s):  
Experimental Data ◽  
Sodium Chloride ◽  
Nephelometric Method ◽  
Coagulation Mechanism ◽  
Aggregation Processes ◽  
Primary Particles ◽  
Two Stages ◽  
Latex Coagulation ◽  
Lyophobic Sols ◽  
Butadiene Styrene

Abstract 1. It is shown that the absolute values of the coagulation thresholds of SKS-30A latexes diluted down to 0.01% correspond to the usual values for lyophobic sols. The values for NaCl are 200 times those for CaCl2, and increase with the latex concentration. The complete coagulation concentration for NaCl is 30 times that for CaCl2, and does not depend on the dilution of the latex. 2. It was shown by a nephelometric method that the volume of the primary particles formed in coagulation of the latex by sodium chloride is about 10 times the volume of the uncoagulated latex globules, irrespective of the latex concentration. 3. Consideration of the experimental data, in conjunction with facts reported in the literature, leads to the concept of two stages in the coagulation of latex by electrolytes: the first is the consequence of a decrease of the zeta potential, leading to the formation of primary particles, and the second leads to coalescence of these particles. The secondary aggregation processes can be prevented or modified by introduction of certain additives (nonelectrolytes) into the latex. 4. In additon to an explanation of the mechanism of latex coagulation by electrolytes, and a demonstration that this process can be controlled, indications are given of means of an approach to development of conditions for the production of a good blanket by coagulation of latex by sodium chloride, with a much decreased consumption of the latter.

scholarly journals Comparative Study on Plant Latex Particles and Latex Coagulation in Ficus benjamina, Campanula glomerata and Three Euphorbia species

PLoS ONE ◽  
2014 ◽  
Vol 9 (11) ◽  
pp. e113336 ◽  
Author(s):  
Georg Bauer ◽  
Stanislav N. Gorb ◽  
Marie-Christin Klein ◽  
Anke Nellesen ◽  
Max von Tapavicza ◽  
...  
Keyword(s):  
Comparative Study ◽  
Latex Particles ◽  
Ficus Benjamina ◽  
Latex Coagulation ◽  
Plant Latex

scholarly journals FWHM Dimentional Analysis From Scattered Light Intensity Profile for Dry Rubber Content Determination in Natural Rubber

2018 ◽  
Vol 9 (1) ◽  
pp. 9-14 ◽  
Author(s):  
Ikha Rasti Julia Sari ◽  
Januar Arif Fatkhurrahman ◽  
Farida Crisnaningtyas ◽  
Moch. Syarif Romadhon
Keyword(s):  
Natural Rubber ◽  
Scattered Light ◽  
Rubber Particle ◽  
Natural Rubber Latex ◽  
Correlation Factor ◽  
Rubber Content ◽  
Rubber Latex ◽  
Content Determination ◽  
Latex Coagulation ◽  
High Linear Correlation

Dry Rubber Content (DRC) describes a rubber particle percentage in natural rubber latex. In this paper, the relation between forward light scattering profiles of natural latex and rubber contents is reported for dry rubber content latex. The profile, characterized by Full Width at Half Maximum (FWHM), is increasing linearly with respect to rubber content. The measurement was performed immediately after latex being tapped with necessary addition of acetic acid. This addition was meant to prevent latex coagulation. There is a high linear correlation between DRC and FWHM of both domain: one and two dimension. This is indicated by correlation factor which are higher than 0.9 for both of domains and sufficient in DRC determination.

scholarly journals Chemical Differentiation of Plant Latexes and Their Anti-herbivory Activity against Thrips Frankliniella occidentalis

Planta Medica ◽  
2021 ◽  
Author(s):  
Luis Francisco Salomé-Abarca ◽  
Thomas van der Toorn ◽  
Rogier van Vugt ◽  
Peter G. L. Klinkhamer ◽  
Young Hae Choi
Keyword(s):  
Data Analysis ◽  
Multivariate Data Analysis ◽  
Frankliniella Occidentalis ◽  
Clear Separation ◽  
Complementary Effect ◽  
Factors Influencing ◽  
Diverse Species ◽  
Mortality Index ◽  
Chemical Profiles ◽  
Latex Coagulation

AbstractDespite the extensive studies on latex, some fundamental questions on their chemical specialization and the factors influencing this specialization have yet to be investigated. To address this issue, latexes and their bearing tissues from diverse species were profiled by 1HNMR and GC-MS. Additionally, the antiherbivory activity of these materials was tested against thrips (Frankliniella occidentalis Pergande, 1895). The multivariate data analysis showed a clear separation between latexes and leaves from the same species. Conversely, the chemical profiles of latexes from different species were highly similar, that is, they displayed much less metabolic species-specificity. These shared chemical profiles of latexes were reflected in their overall higher mortality index (80.4% ± 7.5) against thrips compared with their bearing tissues (55.5% ± 14.9). The metabolites correlated to the antiherbivory activity of latexes were triterpenoids and steroids. However, the activity could not be attributed to any single terpenoid. This discrepancy and the reduction of the latex activity after fractionation suggested a complementary effect of the compounds when in a mixture as represented by the latex. Additionally, aqueous fractions of several latexes were found to possess simple spectra, even with only 1 metabolite. These metabolites were determined to be organic acids that might be involved in the modulation of the rate of latex coagulation, potentially increasing the sealing and trapping effects of the latex.

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