Study on Improving the Fixation Rate of Impregnated Poplar Wood with Maltodextrin and 1,3-Dimethylol-4,5-Dihydroxyethyleneurea

The impregnation of poplar wood (Populus adenopoda Maxim) with 1,3-dimethylol-4,5-dihydroxyethyleneurea and maltodextrin and the effects of ZnCl2 and curing at 103 °C and 120 °C on the fixation rate and the leaching resistance of modified samples were investigated (103 °C curing, ZnCl2 + 103 °C curing, 120 °C curing, and ZnCl2 + 120 °C curing are denoted as 103, ZC-103, 120, and ZC-120, respectively), with the aim of improving the modification effect. The results showed that ZC-103 had the highest fixation rate, and its weight leaching ratio was higher than that of 120. Fourier-transform infrared spectroscopy showed that ZnCl2 did not affect the functional groups of the modified chemicals. The flexural strength and modulus and the compressive strength perpendicular to the grain were highest for ZC-103. In summary, ZC-103 exhibited the highest fixation rate, indicating that the hardener ZnCl2 bridged and increased the interfacial properties between the chemicals and cell walls and therefore increased the potential for macromolecule polycondensation between the chemicals and cell wall materials. This research paves the way for improving the fixation rate of impregnated wood and provides new insights into practical applications.

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Retention of Water by Plant Cell Walls and Implications for Drought Resistance

Australian Journal of Biological Sciences ◽

10.1071/bi9670041 ◽

1967 ◽

Vol 20 (1) ◽

pp. 41 ◽

Cited By ~ 13

Author(s):

TS Teoh ◽

LAG Aylmore ◽

JP Quirk

Keyword(s):

Cell Wall ◽

Vicia Faba ◽

Plant Cell ◽

Drought Resistance ◽

Cell Walls ◽

Plant Cell Walls ◽

Triticum Vulgare ◽

Vicia Faba L ◽

Wall Materials ◽

Cell Wall Materials

The water�retaining properties of cell wall materials from the roots of two monocotyledons (Ehrharta calycina Sm. and Triticum vulgare Vill. cv. Gabo) and two dicotyledons (Salicornia australis Banks & Soland and Vicia faba L.) have been studied.

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Time of Harvest and Method of Storage Affect Granulation in Grapefruit

HortScience ◽

10.21273/hortsci.33.4.728 ◽

1998 ◽

Vol 33 (4) ◽

pp. 728-730 ◽

Cited By ~ 14

Author(s):

Jacqueline K. Burns ◽

L. Gene Albrigo

Keyword(s):

Cell Wall ◽

Fruit Size ◽

Tree Age ◽

Citrus Paradisi ◽

Marked Accumulation ◽

Wall Materials ◽

Time Of Harvest ◽

Cell Wall Materials

Temporal studies were conducted from mid- to late-harvest season of `Ruby Red' grapefruit (Citrus paradisi Macf.) to evaluate the effect of on- and off-tree storage, fruit size, and juice vesicle position on the development of granulation. Juice vesicle fresh and dry masses were highest at the stem and stylar positions of the fruit section and were not affected significantly by time of harvest or by storage. Juice vesicles isolated from each position were subjectively evaluated for the presence of granulation. Granulation was highest in stylar juice vesicles obtained from large fruit (≈600 g) that were harvested late in the season (March and May) and stored in air at 21 °C for 60 days. Large fruit harvested in March and May and examined immediately, and fruit harvested in January and stored for 60 days had low granulation scores. Thus, fruit remaining on the tree until May are less susceptible to the disorder than those harvested in March and held in storage until May. Levels of alcohol-insoluble solids (AIS), largely composed of pectins and other cell wall materials, were significantly higher in juice vesicles that were granulated. The results suggest that storage itself was not responsible for the marked accumulation of AIS in granulated juice vesicles. Rather, some interaction of fruit size with maturation, as well as other factors such as tree age and rootstock, likely contributed to the development of granulation.

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Copolymerization of Bacterial Cell Wall Materials to Enhance Stability of Polyhydroxyalkanoate

Macromolecular Chemistry and Physics ◽

10.1002/macp.201200503 ◽

2012 ◽

Vol 213 (24) ◽

pp. 2647-2652 ◽

Cited By ~ 1

Author(s):

Ning Chen ◽

Xu Xiang ◽

Ratul Saha ◽

Susan T. Bagley ◽

Patricia A. Heiden

Keyword(s):

Cell Wall ◽

Bacterial Cell ◽

Bacterial Cell Wall ◽

Wall Materials ◽

Cell Wall Materials

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Physicochemical properties of cell wall materials from apple, kiwifruit and tomato

European Food Research and Technology ◽

10.1007/s00217-007-0762-1 ◽

2007 ◽

Vol 227 (2) ◽

pp. 607-618 ◽

Cited By ~ 41

Author(s):

Robert J. Redgwell ◽

Delphine Curti ◽

Cécile Gehin-Delval

Keyword(s):

Cell Wall ◽

Physicochemical Properties ◽

Wall Materials ◽

Cell Wall Materials

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Solubilisation of Ferulic Acid from Plant Cell Wall Materials in a Model Human Gut System

Biochemical Society Transactions ◽

10.1042/bst024384s ◽

1996 ◽

Vol 24 (3) ◽

pp. 384S-384S ◽

Cited By ~ 6

Author(s):

PAUL A KROON ◽

CRAIG B FAULDS ◽

PETER RYDEN ◽

GARY WILLIAMSON

Keyword(s):

Cell Wall ◽

Ferulic Acid ◽

Plant Cell ◽

Plant Cell Wall ◽

Human Gut ◽

Wall Materials ◽

Cell Wall Materials

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Numerical Analysis and Mechanical Properties of Nomex™ Honeycomb Core

Volume 14: Emerging Technologies; Materials: Genetics to Structures; Safety Engineering and Risk Analysis ◽

10.1115/imece2017-72654 ◽

2017 ◽

Author(s):

Yue Liu ◽

Weicheng Gao ◽

Wei Liu ◽

Zhou Hua

Keyword(s):

Compressive Strength ◽

Cell Walls ◽

Mechanical Response ◽

Compressive Loading ◽

Fe Model ◽

Honeycomb Core ◽

Practical Applications ◽

Honeycomb Sandwich ◽

Nomex Honeycomb ◽

Strength And Stiffness

This paper presents an investigation on the mechanical response of the Nomex honeycomb core subjected to flatwise compressive loading. Thin plate elastic in-plane compressive buckling theory is used to analyze the Nomex honeycomb core cell wall. A mesoscopic finite element (FE) model of honeycomb sandwich structure with the Nomex honeycomb cell walls is established by employing ABAQUS/Explicit shell elements. The compressive strength and compressive stiffness of Nomex honeycomb core with different heights and thickness of cell walls, i.e. double cell walls and single cell walls, are analyzed numerically using the FE model. Flatwise compressive tests are also carried out on bare honeycomb cores to validate the numerical method. The results suggest that the compressive strength and compression stiffness are related to the geometric dimensions of the honeycomb core. The Nomex honeycomb core with a height of 6 mm has a higher strength than that of 8 mm. In addition, the honeycomb core with lower height possesses stronger anti-instability ability, including the compressive strength and stiffness. The proposed mesoscopic model can effectively simulate the crushing process of Nomex honeycomb core and accurately predict the strength and stiffness of honeycomb sandwich panels. Our work is instructive to the practical applications in engineering.

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Pharmacognostic Studies of the Stem Bark of Enantia chlorantha Oliver (Annonaceae)

Nigerian Journal of Natural Products and Medicine ◽

10.4314/njnpm.v19i0.14 ◽

2015 ◽

Vol 19 ◽

pp. 122-125

Author(s):

TL Ohemu ◽

A Agunu ◽

DG Dafam ◽

PN Olotu

Keyword(s):

Cell Wall ◽

Calcium Oxalate ◽

Stem Bark ◽

Standard Methods ◽

Antiulcer Agents ◽

Physiochemical Parameters ◽

Microscopic Studies ◽

Wall Materials ◽

Cell Wall Materials

Enantia chlorantha Oliver (Annonaceae) is commonly known as African yellow wood used as hepatoprotective, antiviral, antimalarial, antibacterial and antiulcer agents. The study was aimed to investigate the pharmacognostic and physiochemical parameters of E. chlorantha stem bark. The macroscopy, microscopy and chemomicroscopy of E. chlorantha were carried out using standard methods. Cell wall materials, cell inclusions and other diagnostic characters, which can aid in the easy and proper identification of the plant, were identified. The microscopic studies revealed the presence of sclereids, fibres, medullary ray, and calcium oxalate prisms. The physiochemical evaluation of was done, in order to ascertain quality and purity. This study provides additional useful information needed for determination of its identity and quality that can be added as enrichment of the pharmacopoeia of the plant.Keywords: Pharmacognostic, Stem Bark, Enantia chlorantha

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