• Journal of the Korean Wood Science and Technology
• /
• v.26 no.2
• /
• pp.24-28
• /
• 1998

Ray cells with perforations are recorded for the first time in the Korean Celastraceae species of Euonymus sieboldiana and Tripterygium regelii and the Oleaceae species of Abeliophyllum distichum, Forsythia ovata, Ligustrum japonicum, and Osmanthus heterophylla, All these anomalous ray cells have simple perforations, and the vessel elements of all these species have simple perforation plates, Thus, in the Korean Celastraceae and Oleaceae, the perforations of ray cells appear to be identical with the types of perforation plates in the vessel elements of the same wood, The diagnostic value of the perforated ray cells is also discussed.

• Journal of Korean Society of Forest Science
• /
• v.84 no.4
• /
• pp.432-436
• /
• 1995

Perforated ray cells are recorded for the first time in the Korean hardwoods of Rosa multiflora, Rosa multiflora var. platyphylla, Rosa rugosa, Spiraea cantoniensis, and Stephanandra incisa belonging to the family Rosaceae. The perforated ray cells have simple perforations, which are identical with the types of perforation plates in the vessel elements of same wood.

• Journal of Korean Society of Forest Science
• /
• v.88 no.3
• /
• pp.374-378
• /
• 1999

In present study, perforated ray cells were recorded for the first time in the species of Berberis amurensis and Berberis poiretii (Berberidaceae) and Mallotus japonicus and Sapium japonicum (Euphorbiaceae) that grow in Korea. These ray cells had simply perforations in the above species which had vessel elements with simple perforations, In Korean Berberidaceae and Euphorbiaceae, thus, the perforation types of perforated ray cells appeared to be identical with the types of perforation plates in the vessel elements is the same wood.

• Journal of Korean Society of Forest Science
• /
• v.86 no.3
• /
• pp.319-323
• /
• 1997

Perforated ray cells are identified for the first time in the Korean species of Deutzia glabrata, Deutzia sieboldiana, Hydrangea paniculata, and Philadelphus schrenckii that belong to Hydrangeaceae but not observed in Deutzia gracilis. These ray cells have simple to scalarifrom perforations in Deutzia glabrata which have vessel elements with scalariform perforations, and have scalariform to reticulate perforations in Deutzia sieboldiana, Hydrangea paniculata, and Philadelphus schrenckii which have vessel elements with scalariform perforations. Thus, the perforations of ray cells in Korean Hydrangeaceae appeared not to be exactly the same as the types of scalariform perforation plates in the vessel elements of same wood.

• Journal of the Korean Wood Science and Technology
• /
• v.22 no.1
• /
• pp.40-43
• /
• 1994

본(本) 논문(論文)은 버즘나무과(科)의 버즘나무 (Platanus orientalis L.)에 있어서 목부(木部) 방사조직(放射組織)내에 천공(穿孔)을 지니는 방사조직(放射組織) 세포(細胞)가 존재(存在)함을 처음으로 보고(報告)하는 것으로 이들 방사조직(放射組織) 세포(細胞)의 천공판(穿孔板)은 도관요소(導管要素) 상호간(相互間)에 발달(發達)하는 천공판(穿孔板)과 동일(同一)하게 단일천공판(單一穿孔板)과 계단상천공판(階段狀穿孔板)을 지니는 것으로 밝혀졌다.

• Journal of Powder Materials
• /
• v.22 no.5
• /
• pp.350-355
• /
• 2015

Perforated polygonal cobalt oxide ($Co_3O_4$) is synthesized using electrospinning and a hydrothermal method followed by the removal of a carbon nanofiber (CNF) template. To investigate their formation mechanism, thermogravimetric analysis, field-emission scanning electron microscopy, transmission electron microscopy, X-ray diffraction, and X-ray photoelectron spectroscopy are examined. To obtain the optimum condition of perforated polygonal $Co_3O_4$, we prepare three different weight ratios of the Co precursor and the CNF template: sample A (Co precursor:CNF template- 10:1), sample B (Co precursor:CNF template-3.2:1), and sample C (Co precursor:CNF template-2:1). Among them, sample A exhibits the perforated polygonal $Co_3O_4$ with a thin carbon layer (5.7-6.2 nm) owing to the removal of CNF template. However, sample B and sample C synthesized perforated round $Co_3O_4$ and destroyed $Co_3O_4$ powders, respectively, due to a decreased amount of Co precursor. The increased amount of the CNF template prevents the formation of polygonal $Co_3O_4$. For sample A, the optimized weight ratio of the Co precursor and CNF template may be related to the successful formation of perforated polygonal $Co_3O_4$. Thus, perforated polygonal $Co_3O_4$ can be applied to electrode materials of energy storage devices such as lithium ion batteries, supercapacitors, and fuel cells.