(-)-Jasmonic Acid, a Phytotoxic Substance from Botryodiplodia theobromae: Characterization by NMR Spectroscopic Methods

1993 ◽  
Vol 56 (11) ◽  
pp. 2008-2011 ◽  
Author(s):  
Akhtar Husain ◽  
Absar Ahmad ◽  
Pawan K. Agrawal
Keyword(s):  
Jasmonic Acid ◽  
Spectroscopic Methods ◽  
Botryodiplodia Theobromae ◽  
Phytotoxic Substance

Hydroxylated jasmonic acid and related compounds from Botryodiplodia theobromae

1991 ◽  
Vol 30 (12) ◽  
pp. 4049-4051 ◽  
Author(s):  
Otto Miersch ◽  
Gernot Schneider ◽  
Günther Sembdner
Keyword(s):  
Jasmonic Acid ◽  
Botryodiplodia Theobromae ◽  
Related Compounds

Jasmonic acid-like substances from the culture filtrate of Botryodiplodia theobromae

1989 ◽  
Vol 28 (5) ◽  
pp. 1303-1305 ◽  
Author(s):  
Otto Miersch ◽  
Jürgen Schmidt ◽  
Günther Sembdner ◽  
Klaus Schreiber
Keyword(s):  
Jasmonic Acid ◽  
Culture Filtrate ◽  
Botryodiplodia Theobromae

(+)-7-Iso-jasmonic acid and related compounds from botryodiplodia theobromae

1987 ◽  
Vol 26 (4) ◽  
pp. 1037-1039 ◽  
Author(s):  
Otto Miersch ◽  
Alfred Preiss ◽  
Günther Sembdner ◽  
Klaus Schreiber
Keyword(s):  
Jasmonic Acid ◽  
Botryodiplodia Theobromae ◽  
Related Compounds

Induction of Hydroxycinnamic Acid Amides and Tryptophan by Jasmonic Acid, Abscisic Acid and Osmotic Stress in Barley Leaves

2001 ◽  
Vol 56 (3-4) ◽  
pp. 193-202 ◽  
Author(s):  
Yuki Ogura ◽  
Atsushi Ishihara ◽  
Hajime Iwamura
Keyword(s):  
Abscisic Acid ◽  
Hordeum Vulgare ◽  
Osmotic Stress ◽  
Jasmonic Acid ◽  
Secondary Metabolism ◽  
Hydroxycinnamic Acid ◽  
Spectroscopic Methods ◽  
Hordeum Vulgare L ◽  
Hydroxycinnamic Acid Amides ◽  
Barley Leaves

AbstractThe effects of jasmonic acid (JA) and abscisic aid (ABA) on secondary metabolism in barley (Hordeum vulgare L.) were investigated. Treatment with JA at 100 μᴍ for 48 h induced accumulation of four compounds in barley primary leaves. The accumulation of these com­pounds was also observed after treatment with ABA at 100 μᴍ. The induced compounds were identified as p-coumaroylputrescine, p-coumaroylagmatine, p-coumaroyl-3-hydroxyagmatine and tryptophan by spectroscopic methods. The profiles of compounds induced by application of JA and ABA were different. JA exhibited stronger inducing activity for hydroxycinnamic acid amides than ABA, while ABA was more active in tryptophan accumulation. The major hydroxycinnamic acid amides in JA-and ABA-treated leaves were p-coumaroylagmatine and p-coumaroyl-3-hydroxyagmatine, respectively. These differences suggested that JA and ABA act in distinct modes. The induction of these compounds was also observed in leaf segments treated with 1 ᴍ sorbitol and glucose. These findings suggested that JA and ABA are involved in accumulation of hydroxycinnamic acid amides and tryptophan in response to osmotic stress in barley.

Temperature Dependence of the Self-Assembled Styrene Based Random Ionomers in Aqueous Solution

2003 ◽  
Vol 775 ◽  
Author(s):  
Sung-Hwa Oh ◽  
Ju-Myung Song ◽  
Joon-Seop Kim ◽  
Hyang-Rim Oh ◽  
Jeong-A Yu
Keyword(s):  
Partition Coefficients ◽  
Room Temperature ◽  
Aqueous Media ◽  
The Self ◽  
Spectroscopic Methods ◽  
Ion Content ◽  
Repeat Units ◽  
Notable Effect ◽  
Order Of Magnitude ◽  
Experimental Errors

AbstractSolution behaviors of poly(styrene-co-sodium methacrylate) were studied by fluorescence spectroscopic methods using pyrene as a probe. The mol% of methacrylate was in the range 3.6–9.4. Water and N,N-dimethylforamide(DMF) mixture was used as a solvent (DMF/water = 0.2 mol %). The critical micelle (or aggregation) concentrations of ionomers and the partition coefficients of pyrene were obtained the temperature range 10–80°C. At room temperature, the values of CMCs (or CACs) were in the range 4.7 ×10-6 5.3 ×10-6 g/mL and we could not find any notable effect of the content of ionic repeat units within the experimental errors. Unlike CMCs, as the ion content increased, partitioning of pyrene between the hydrophobic aggregates and an aqueous media decreased from 1.5 ×105 to 9.4 ×104. As the temperature increased from 10 to 80 °C, the values of CMCs increased less than one order of magnitude. While, the partition coefficients of pyrene decreased one order of magnitude and the effect of the ion content became negligible.

Investigation of Some Characterizations of Black TiO\(_2\) Nanotubes Via Spectroscopic Methods

2019 ◽  
Vol 29 (2) ◽  
pp. 189 ◽  
Author(s):  
Tho Truong Nguyen ◽  
Thi Minh Cao ◽  
Hieu Van Le ◽  
Viet Van Pham
Keyword(s):  
Water Splitting ◽  
Oxygen Vacancies ◽  
Light Response ◽  
Nanotube Arrays ◽  
Spectroscopic Methods ◽  
Visible Light Response ◽  
Uv Visible ◽  
Visible Reflectance ◽  
Splitting Effect ◽  
Anodization Method

The black TiO\(_2\) with substantial Ti\(^3+\) and oxygen vacancies exhibit an excellent photoelectrochemical water-splitting performance due to the improved charge transport the extended visible light response. In this study, black TiO\(_2\) nanotube arrays synthesized by the anodization method, and then, they have been investigated some characterizations by spectroscopic methods such as UV-visible reflectance (UV-vis DRS), Fourier-transform infrared spectroscopy (FTIR), Raman spectroscopy, and photoluminescence spectrum. The results showed that some highlighted properties of the black TiO2 nanotube arrays and they could apply for water-splitting effect.

Measurement of a static polyacrylamide adsorbtion by optical and spectroscopic methods

2019 ◽  
pp. 94-96
Author(s):  
L.A. Magadova ◽  
◽  
K.A. Poteshkina ◽  
M.M. Muchin ◽  
M.A. Silin ◽  
...  
Keyword(s):  
Spectroscopic Methods
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