scholarly journals Influence of Ethylene on Indole-3-acetic Acid Concentration in Etiolated Pea Epicotyl Tissue

1977 ◽  
Vol 60 (4) ◽  
pp. 475-477 ◽  
Author(s):  
Morris Lieberman ◽  
Erik Knegt
Keyword(s):  
Acetic Acid ◽  
Acid Concentration ◽  
Acetic Acid Concentration ◽  
Pea Epicotyl ◽  
Indole 3 Acetic Acid

Reduced Indole-3-acetic Acid Decomposition Causes Enhanced Growth of Plums Affected by the Fungus Taphrina pruni

1997 ◽  
Vol 52 (7-8) ◽  
pp. 504-507 ◽  
Author(s):  
Claus T. Fuchs ◽  
Gerhard Spiteller
Keyword(s):  
Acetic Acid ◽  
Acid Concentration ◽  
Acetic Acid Concentration ◽  
Acid Decomposition ◽  
Indole 3 Acetic Acid

Abstract Plums attacked by the fungus Taphrina pruni produce great amounts of catechins and caffeoyl-ᴅ-quinic acids. This reduces - as we show in this paper - the degradation of indole-3-acetic acid. The increased indole-3-acetic acid concentration causes enhanced growth of infected plums in comparison to not infected ones.

scholarly journals The Combined Effects of Magnesium Oxide and Inulin on Intestinal Microbiota and Cecal Short-Chain Fatty Acids

Nutrients ◽  
2021 ◽  
Vol 13 (1) ◽  
pp. 152
Author(s):  
Kanako Omori ◽  
Hiroki Miyakawa ◽  
Aya Watanabe ◽  
Yuki Nakayama ◽  
Yijin Lyu ◽  
...  
Keyword(s):  
Fatty Acids ◽  
Acetic Acid ◽  
Dietary Fiber ◽  
Magnesium Oxide ◽  
Acid Concentration ◽  
Short Chain Fatty Acids ◽  
Water Soluble ◽  
Short Chain ◽  
Acetic Acid Concentration ◽  
Chain Fatty Acids

Constipation is a common condition that occurs in many people worldwide. While magnesium oxide (MgO) is often used as the first-line drug for chronic constipation in Japan, dietary fiber intake is also recommended. Dietary fiber is fermented by microbiota to produce short-chain fatty acids (SCFAs). SCFAs are involved in regulating systemic physiological functions and circadian rhythm. We examined the effect of combining MgO and the water-soluble dietary fiber, inulin, on cecal SCFA concentration and microbiota in mice. We also examined the MgO administration timing effect on cecal SCFAs. The cecal SCFA concentrations were measured by gas chromatography, and the microbiota was determined using next-generation sequencing. Inulin intake decreased cecal pH and increased cecal SCFA concentrations while combining MgO increased the cecal pH lowered by inulin and decreased the cecal SCFA concentrations elevated by inulin. When inulin and MgO were combined, significant changes in the microbiota composition were observed compared with inulin alone. The MgO effect on the cecal acetic acid concentration was less when administered at ZT12 than at ZT0. In conclusion, this study suggests that MgO affects cecal SCFA and microbiota during inulin feeding, and the effect on acetic acid concentration is time-dependent.

Optimization of pH and acetic acid concentration for bioconversion of hemicellulose from corncobs to xylitol by Candida tropicalis

2009 ◽  
Vol 43 (2) ◽  
pp. 203-207 ◽  
Author(s):  
Ke-Ke Cheng ◽  
Jian-An Zhang ◽  
Hong-Zhi Ling ◽  
Wen-Xiang Ping ◽  
Wei Huang ◽  
...  
Keyword(s):  
Acetic Acid ◽  
Acid Concentration ◽  
Candida Tropicalis ◽  
Acetic Acid Concentration

scholarly journals THE EFFECT OF CHLORO ACETIC ACID CONCENTRATION AND TEMPERATURE REACTION OF CARBOXYMETHYL CHITOSAN FORMATION ON CATION EXCHANGE CAPACITY AND THERMAL STABILITY

2018 ◽  
Vol 10 (1) ◽  
pp. 31
Author(s):  
Candra Purnawan ◽  
Edi Pramono ◽  
Purwanto Purwanto
Keyword(s):  
Thermal Stability ◽  
Acetic Acid ◽  
Cation Exchange ◽  
Acid Concentration ◽  
Cation Exchange Capacity ◽  
Exchange Capacity ◽  
Carboxymethyl Chitosan ◽  
Temperature Reaction ◽  
Acetic Acid Concentration ◽  
Thermal Stability Of

<p>The research on the effect of chloro acetic concentration and temperature reaction of carboxymethyl chitosan formation on cation exchange capacity and thermal stability of polymer have been done. Carboxymethyl chitosan was synthesized by reaction of chitosan and chloro acetic acid with NaOH as catalyst. Polymer was characterized by Fourier Transform Infrared Spectrofotometer, cation exchange capacity test, and thermal analysis with thermogravimetric method. Carboxymethyl chitosan has strong FTIR adsorption of carboxyl group (-COO-) in 1606,70 cm<sup>-1</sup> and 1444,68 cm<sup>-1</sup>. The increasing of chloro acetic acid concentration and reaction temperature decreased cation exchage capacity and changed thermal stability of polymer.</p>

scholarly journals Processing variables of direct-write, near-field electrospinning impact size and morphology of gelatin fibers

2020 ◽  
Author(s):  
Zachary G. Davis ◽  
Aasim F. Hussain ◽  
Matthew B. Fisher
Keyword(s):  
Acetic Acid ◽  
Acid Concentration ◽  
Near Field ◽  
Fiber Formation ◽  
Direct Write ◽  
Acetic Acid Concentration ◽  
Direct Writing ◽  
Fiber Morphology ◽  
Gelatin Concentration ◽  
The Impact

AbstractSeveral biofabrication methods are being investigated to produce scaffolds that can replicate the structure of the extracellular matrix. Direct-write, near-field electrospinning of polymer solutions and melts is one such method which combines fine fiber formation with computer-guided control. Research with such systems has focused primarily on synthetic polymers. To better understand the behavior of biopolymers used for direct-writing, this project investigated changes in fiber morphology, size, and variability caused by varying gelatin and acetic acid concentration, as well as, process parameters such as needle gauge and height, stage speed, and interfiber spacing. Increasing gelatin concentration at a constant acetic acid concentration improved fiber morphology from large, planar structures to small, linear fibers with a median of 2.3 µm. Further varying the acetic acid concentration at a constant gelatin concentration did not alter fiber morphology and diameter throughout the range tested. Varying needle gauge and height further improved the median fiber diameter to below 2 µm and variability of the first and third quartiles to within +/-1 µm of the median for the optimal solution combination of gelatin and acetic acid concentrations. Additional adjustment of stage speed did not impact the fiber morphology or diameter. Repeatable interfiber spacings down to 250 µm were shown to be capable with the system. In summary, this study illustrates the optimization of processing parameters for direct-writing of gelatin to produce fibers on the scale of collagen fibers. This system is thus capable of replicating the fibrous structure of musculoskeletal tissues with biologically relevant materials which will provide a durable platform for the analysis of single cell-fiber interactions to help better understand the impact scaffold materials and dimensions have on cell behavior.

Study of pH Effect on the Anaerobic-Aerobic Fermentation of Siwalan (Borassus flabellifer L.) Sap to Produce Acetic Acid

2019 ◽  
Vol 964 ◽  
pp. 209-214
Author(s):  
Elly Agustiani ◽  
Atiqa Rahmawati ◽  
Fibrillian Zata Lini ◽  
Dimas Luthfi Ramadhani
Keyword(s):  
Acetic Acid ◽  
Acid Concentration ◽  
Ethanol Fermentation ◽  
Anaerobic Fermentation ◽  
Sugar Content ◽  
Alcoholic Beverages ◽  
Acetic Acid Concentration ◽  
Acetobacter Aceti ◽  
Aerobic Fermentation ◽  
Acid Product

Siwalan (Borassus flabellifer L.) is a palm family that is widely planted in the Tuban area of ​​East Java. Siwalan sap has a relatively high sugar content of about 10-15 g / 100 ml. The sap is obtained by tapping the inflorescences. In general, siwalan sap is used for fresh drinks or alcoholic beverages with maximum storage in 3 days. Based on the sugar content in the sap of siwalan, acetic acid products can be made through fermentation of glucose to ethanol, then the ethanol is fermented into acetic acid. Acetic acid is widely used as a preservative of food and health drinks. The purpose of this research is to study the effect of ethanol fermentation aerobic pH on acetic acid product. Anaerobic fermentation uses saccharomyces cereviceae to produce ethanol, and aerobic fermentation uses acetobacter aceti for acetic acid production. In aerobic ethanol fermentation using pH 3; 3.5; 4 and 5. The concentration of ethanol was analyzed using GC ULTRA Scientific Gas Chromatography, DSQ II detector, and MS 220 column. Acetic acid produced from the aerobic fermentation process was analyzed using an alkalimetric method. Anaerobic fermentation uses Saccharomyces cereviceae with 1-day log phase, while aerobic fermentation uses acetobacter aceti with a 5 day log phase. Aerobic fermentation to produce acetic acid was observed in 5 days to obtained maximum acetic acid concentration, the highest acetic acid concetration is about 2.595 g/l and yield of acetic acid is obtained 0.519% (b/v) at pH 5. Low acetic acid concentration due to low intitial sugar content in siwalan sap.

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