Assessment of Dimensional Stability, Biodegradability, and Fracture Energy of Bio-Composites Reinforced with Novel Pine Cone

In this investigation, biodegradable composites were fabricated with polycaprolactone (PCL) matrix reinforced with pine cone powder (15%, 30%, and 45% by weight) and compatibilized with graphite powder (0%, 5%, 10%, and 15% by weight) in polycaprolactone matrix by compression molding technique. The samples were prepared as per ASTM standard and tested for dimensional stability, biodegradability, and fracture energy with scanning electron micrographs. Water-absorption and thickness-swelling were performed to examine the dimensional stability and tests were performed at 23 °C and 50% humidity. Results revealed that the composites with 15 wt % of pine cone powder (PCP) have shown higher dimensional stability as compared to other composites. Bio-composites containing 15–45 wt % of PCP with low graphite content have shown higher disintegration rate than neat PCL. Fracture energy for crack initiation in bio-composites was increased by 68% with 30% PCP. Scanning electron microscopy (SEM) of the composites have shown evenly-distributed PCP particles throughout PCL-matrix at significantly high-degrees or quantities of reinforcing.

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Effects of Resin Content on the Characteristics of Bamboo Oriented Strand Board Prepared from Strands of Betung, Ampel, and Their Mixtures

Jurnal Sylva Lestari ◽

10.23960/jsl.v9i3.520 ◽

2021 ◽

Vol 9 (3) ◽

pp. 454-465

Author(s):

Tengku Muhammad Renzy Hariz ◽

Indra Agus Santosa ◽

Muhammad Iqbal Maulana ◽

Marwanto ◽

Denni Prasetia ◽

...

Keyword(s):

Mechanical Properties ◽

Water Absorption ◽

Dimensional Stability ◽

Oriented Strand Board ◽

Physical And Mechanical Properties ◽

Resin Content ◽

Thickness Swelling ◽

Higher Dimensional ◽

Bambusa Vulgaris ◽

Dendrocalamus Asper

The objectives of this research were to evaluate bamboo-oriented strand board (BOSB) characteristics made from betung (Dendrocalamus asper), ampel (Bambusa vulgaris), and their mixtures at two different contents (3% and 5%) of methylene diphenyl di-isocyanate (MDI) adhesives. The strands were steam-treated at 126°C for 1 h under the pressure of 0.14 MPa. Three-layered BOSBs with a target density of 0.7 g/cm3 were made with the size of 30 cm x 30 cm x 0.9 cm and a shelling ratio of 1:2:1 (face:core:back layers). The physical and mechanical properties of BOSB were evaluated following JIS A 5908 (2003) standard, and the results were compared with the CSA 0437.0 Grade O-1 standard. The results show that BOSB from the mixtures of betung and ampel bamboo strands has higher dimensional stability as shown by the decrease in water absorption and thickness swelling and higher mechanical properties than single BOSB. All BOSBs with 5% resin content have higher dimensional stability, MOE, and MOR than BOSB with 3% resin content. The physical and mechanical properties of all BOSB manufactured met the CSA 0437.0 Grade O-1 standard. This study proved that BOSBs from the mixture of betung and ampel strands have the potential to be developed due to having better physical and mechanical qualities than a single BOSB. Keywords: ampel (Bambusa vulgaris), bamboo oriented strand board, betung (Dendrocalamus asper), resin content, strand mixtures

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A new genus and four new species of millipedes from Tasmania, Australia (Diplopoda: Polydesmida: Dalodesmidae), with notes on male leg setae in some Tasmanian dalodesmids

Zootaxa ◽

10.11646/zootaxa.558.1.1 ◽

2004 ◽

Vol 558 (1) ◽

pp. 1 ◽

Cited By ~ 2

Author(s):

ROBERT MESIBOV

Keyword(s):

New Species ◽

Electron Micrographs ◽

Type Species ◽

New Genus ◽

Scanning Electron Micrographs ◽

Scanning Electron

Bromodesmus catrionae n. gen., n. sp. (type species), B. militaris n. sp., B. riparius n. sp. and B. rufus n. sp. are described. The new genus is characterized by greatly reduced paranota and a gonopod telopodite expanded at the distal end into a posteriorly concave hood fringed with teeth; the hood partly protects a long, curved, acutely pointed solenomerite. Male leg setation in the type species of six Tasmanian dalodesmid genera is briefly discussed and illustrated with scanning electron micrographs. The sphaerotrichome shaft is sharply pointed in Atrophotergum; gently tapered in Dasystigma, Lissodesmus and Tasmanodesmus; expanded at the tip in Bromodesmus; and entirely absent in Gasterogramma. Tips of the setae forming the dense ventral brush on male podomeres are gently tapered in Dasystigma and Lissodesmus, truncated in Gasterogramma, expanded in Bromodesmus and forked in Tasmanodesmus.

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The ultrastructure of the epidermis of the redia and cercaria of Parorchis acanthus, Nicoll. A study by scanning and transmission electron-microscopy

Parasitology ◽

10.1017/s0031182000077623 ◽

1971 ◽

Vol 62 (3) ◽

pp. 479-488 ◽

Cited By ~ 17

Author(s):

Gwendolen Rees

Keyword(s):

Electron Micrographs ◽

Technical Assistance ◽

Ventral Surface ◽

The Body ◽

Muscle Fibres ◽

Scanning Electron Micrographs ◽

Large Area ◽

Transmission Electron ◽

Parorchis Acanthus ◽

Scanning Electron

Scanning electron-micrographs have shown the covering of microvilli on the surface of the redia of Parorchis acanthus. In the contracted state the elongated microvilli with bulbous extremities seen in the surface grooves may be the result of compression. The surface of the epidermis of the cercaria is smooth on a large area of the ventral surface and lattice-like with microvilli, laterally, anteriorly, dorsally and on the tail. The spines on the body can be withdrawn into sheaths by the contraction of muscle fibres inserted into the basement lamina below each spine.I would like to express my sincere gratitude to Dr I. ap Gwynn of this department for preparing the scanning electron-micrographs and the School of Engineering Science, University of North Wales, Bangor for the use of their stereoscan. I should also like to thank Mr M. C. Bibby for technical assistance and Professor E. G. Gray and Dr W. Sinclair for assistance with the transmission electron-micrographs.

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Aphid parasitoids infesting cotton, citrus, tobacco, and cereal crops in southeastern Europe: aphid-plant associations and keys

The Canadian Entomologist ◽

10.4039/n05-020 ◽

2005 ◽

Vol 137 (5) ◽

pp. 516-531 ◽

Cited By ~ 18

Author(s):

Nickolas G. Kavallieratos ◽

Željko Tomanović ◽

Christos G. Athanassiou ◽

Petr Starý ◽

Vladimir Žikić ◽

...

Keyword(s):

Electron Micrographs ◽

Separate Group ◽

Cereal Crops ◽

Scanning Electron Micrographs ◽

Southeastern Europe ◽

Line Drawings ◽

Plant Associations ◽

New Information ◽

Aphid Parasitoids ◽

Scanning Electron

AbstractWe present new information on the parasitoids (Hymenoptera: Braconidae: Aphidiinae) of aphids infesting cotton, tobacco, citrus, and cereal agroecosystems in southeastern Europe. Nineteen species are keyed and illustrated with scanning electron micrographs and line drawings. The aphidiines presented in this work have been identified from 18 aphid taxa. Furthermore, 96 original parasitoid–aphid–plant associations are presented. Cotton, tobacco, and citrus agroecosystems are connected through aphids and their parasitoids, whereas cereal agroecosystems represent a separate group of associations.

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Use of electron microscopy to characterize the surfaces of flocculent and nonflocculent yeast cells

Canadian Journal of Microbiology ◽

10.1139/m89-181 ◽

1989 ◽

Vol 35 (12) ◽

pp. 1081-1086 ◽

Cited By ~ 14

Author(s):

Byron F. Johnson ◽

L. C. Sowden ◽

Teena Walker ◽

Bong Y. Yoo ◽

Gode B. Calleja

Keyword(s):

Electron Microscopy ◽

Fission Yeast ◽

Budding Yeast ◽

The Other ◽

Yeast Cells ◽

Scanning Electron Micrographs ◽

Soft Or ◽

Transmission Electron ◽

Scanning Transmission ◽

Scanning Electron

The surfaces of flocculent and nonflocculent yeast cells have been examined by electron microscopy. Nonextractive preparative procedures for scanning electron microscopy allow comparison in which sharp or softened images of surface details (scars, etc.) are the criteria for relative abundance of flocculum material. Asexually flocculent budding-yeast cells cannot be distinguished from nonflocculent budding-yeast cells in scanning electron micrographs because the scar details of both are well resolved, being hard and sharp. On the other hand, flocculent fission-yeast cells are readily distinguished from nonflocculent cells because fission scars are mostly soft or obscured on flocculent cells, but sharp on nonflocculent cells. Sexually and asexually flocculent fission-yeast cells cannot be distinguished from one another as both are heavily clad in "mucilaginous" or "hairy" coverings. Examination of lightly extracted and heavily extracted flocculent fission-yeast cells by transmission electron microscopy provides micrographs consistent with the scanning electron micrographs.Key words: flocculation, budding yeast, fission yeast, scanning, transmission.

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Key for identification of the parasitoids (Hymenoptera: Braconidae: Aphidiinae) of aphids infesting alfalfa in Europe

Zootaxa ◽

10.11646/zootaxa.4378.1.6 ◽

2018 ◽

Vol 4378 (1) ◽

pp. 98 ◽

Cited By ~ 2

Author(s):

MUSTAFA E. GHALIOW ◽

ANDJELJKO PETROVIĆ ◽

KORANA KOCIĆ ◽

JELISAVETA ČKRKIĆ ◽

ANA MITROVSKI BOGDANOVIĆ ◽

...

Keyword(s):

Electron Micrographs ◽

Scanning Electron Micrographs ◽

Line Drawings ◽

The Subject ◽

Scanning Electron

Although Aphidiinae parasitoids have been used as agents for biocontrol of alfalfa aphids for more than half a century and have been the subject of numerous ecological investigations, there is an evident lack of systematic studies on the parasitoids of aphids infesting alfalfa in Europe. Here we present an original and up-dated key for identification of both native and invasive Aphidiinae parasitoids attacking aphids that feed on alfalfa in Europe. In total, 20 species are keyed and illustrated with scanning electron micrographs and line drawings.

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Study on Mechanical Properties of AA6351 Alloy Reinforced with Titanium Di-Boride (TiB2) Composite by In Situ Casting Method

Applied Mechanics and Materials ◽

10.4028/www.scientific.net/amm.787.583 ◽

2015 ◽

Vol 787 ◽

pp. 583-587 ◽

Cited By ~ 14

Author(s):

V. Mohanavel ◽

K. Rajan ◽

K.R. Senthil Kumar

Keyword(s):

Tensile Strength ◽

Aluminum Matrix ◽

Aluminum Matrix Composites ◽

Scanning Electron Micrographs ◽

Matrix Composites ◽

X Ray Diffraction ◽

In Situ Reaction ◽

Halide Salts ◽

Scanning Electron

In the present study, an aluminum alloy AA6351 was reinforced with different percentages (1, 3 and 5 wt %) of TiB2 particles and they were successfully fabricated by in situ reaction of halide salts, potassium hexafluoro-titanate and potassium tetrafluoro-borate, with aluminium melt. Tensile strength, yield strength and hardness of the composite were investigated. In situ reaction between the inorganic salts K2TiF6 and KBF4 to molten aluminum leads to the formation of TiB2 particles. The prepared aluminum matrix composites were characterized using X-ray diffraction and scanning electron microscope. Scanning electron micrographs revealed a uniform dispersal of TiB2 particles in the aluminum matrix. The results obtained indicate that the hardness and tensile strength were increased with an increase in weight percentages of TiB2 contents.

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Photoluminescence, photocatalysis and Judd–Ofelt analysis of Eu3+-activated layered BiOCl phosphors

RSC Advances ◽

10.1039/c4ra10163d ◽

2015 ◽

Vol 5 (6) ◽

pp. 4109-4120 ◽

Cited By ~ 59

Author(s):

Rohit Saraf ◽

C. Shivakumara ◽

Sukanti Behera ◽

H. Nagabhushana ◽

N. Dhananjaya

Keyword(s):

Crystal Structure ◽

Field Emission ◽

Electron Micrographs ◽

Dye Degradation ◽

Scanning Electron Micrographs ◽

Chromaticity Diagram ◽

Cie Chromaticity ◽

Scanning Electron

Crystal structure of tetragonal BiOCl, field emission scanning electron micrographs, CIE chromaticity diagram and percentage of RhB dye degradation of Bi1−xEuxOCl.

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The Dynamics for Aqueous Sodium Adsorption and Characterization of Natural Pyrophyllite

Applied Mechanics and Materials ◽

10.4028/www.scientific.net/amm.117-119.1129 ◽

2011 ◽

Vol 117-119 ◽

pp. 1129-1132

Author(s):

Bo Liu ◽

Hai Feng Chen ◽

Pei Song Tang

Keyword(s):

Qualitative Analysis ◽

Internal Structure ◽

Electron Micrographs ◽

Scanning Electron Micrographs ◽

Adsorption Dynamics ◽

Natural Mineral ◽

Aqueous Sodium ◽

Materials Used ◽

Scanning Electron

In this experiment, pyrophyllite as the main materials used the flame photometer to measure adsorption. Using the qualitative analysis of the samples of XRD with internal structure and found that pyrophyllite used in the experiment as a natural mineral, the presence with other minerals. Meanwhile, scanning electron micrographs (SEM) from the display showed that the effect of pyrophyllite adsorption for cations should be more significant. Therefore, this experiment focused on the time, Na+ concentration, on the pyrophyllite and different pyrophyllite concentrations (adsorbent dosage) effect on the adsorption, in addition to the adsorption dynamics. The results showed that pyrophyllite adsorption sodium in the best time of equilibrium was 20 minutes, the concentration of NaCl was 50 mg/L, pH = 7, temperature was 313 K, the concentration of pyrophyllite was 5 mg/L.

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Characterization and Utilization of Coconut Fibers of the Caribbean

MRS Proceedings ◽

10.1557/opl.2014.764 ◽

2014 ◽

Vol 1611 ◽

pp. 95-104 ◽

Cited By ~ 2

Author(s):

Nadira Mathura ◽

Duncan Cree ◽

Ryan P. Mulligan

Keyword(s):

Mechanical Properties ◽

Tensile Strength ◽

Electron Micrographs ◽

Saline Water ◽

Gauge Length ◽

Scanning Electron Micrographs ◽

Coir Fiber ◽

Coir Fibers ◽

The Caribbean ◽

Scanning Electron

ABSTRACTIn many tropical countries coconut (coir) fiber production is a major source of income for rural communities. The Caribbean has an abundance of coconuts but research into utilizing its by-products is limited. Environmentally friendly coir fibers are natural polymers generally discarded as waste material in this region. Research has shown that coir fiber from other parts of the world has successfully been recycled. This paper therefore investigates the mechanical properties of Caribbean coir fiber for potential applications in civil engineering.Approximately four hundred fibers were randomly taken from a coir fiber stack and subjected to retting in both distilled and saline water media. The mechanical properties of both the retted and unretted coir fibers were evaluated at weekly increments for a period of 3 months. Tensile strength test, x-ray diffraction analysis and scanning electron micrographs were used to assess trends and relationships between fiber gauge lengths, diameter, tensile strength and Young’s modulus. Diameters ranged between 0.11 mm-0.46 mm, while fiber samples were no longer than 250 mm in length. The tensile strength and strain at break decreased as the gauge length increased for both unretted and retted fibers. The opposite occurred for the relationship between the gauge length and Young’s modulus. Additionally, the tensile strength and modulus decreased as the fiber diameter increased. Neither distilled nor saline water improved the coir fiber’s crystalline index. Scanning electron micrographs qualitatively assessed fiber surfaces and captured necking and microfibril degradation at the fractured ends.The analysis revealed that the tensile strength, modulus, strain at break and crystallinity properties of the Caribbean coir fibers were comparable to commercially available coir fiber which are currently being used in many building applications.

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