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ผลงานตีพิมพ์ในวารสารวิชาการVessel feature changes as a tool for detecting annual rings in tropical treesผู้แต่ง: Ohashi, S, Okada, N, Azim, AAA, Siripatanadilok, S,  Dr.Teera Veenin, Associate Professor , Yahya, AZ, Nobuchi, T, วารสาร: 
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ผลงานตีพิมพ์ในวารสารวิชาการDetecting invisible growth rings of trees in seasonally dry forests in Thailand: isotopic and wood anatomical approachesผู้แต่ง:Ohashi, S, Okada, N, Nobuchi, T, Dr.Somkid Siripatanadilox, Associate Professor , Dr.Teera Veenin, Associate Professor, วารสาร:  |
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 หัวเรื่อง:ไม่มีชื่อไทย (ชื่ออังกฤษ : Seasonal Changes of Wood Formation and some Characteristics of Heartwood Formation in Teak (Tectona grandis L.) Plantation) ผู้เขียน:Tadashi Nobuchi, Sirirat Janmahasatien, Masaharu Sakai สื่อสิ่งพิมพ์:pdf AbstractSome fundamental investigations of wood and heartwood in plantation grown teak (Tectona grandis L.) were carried out. In order to verify the relationship between wood formation and growing conditions, moisture content of soil and the development of leaves were also studied. It was found that moisture content of soil was higher in the rainy season. Since trees started budding in May which was the beginning of the rainy season, those trees grown at the foot of the hill showed earlier development of leaves. As for the time sequence of wood formation using the pining method, it was revealed that wood formation started after the budding and continued to do so until the end of rainy season. Parenchyma cells of the outer sapwood had great amount of starch grains as reserve substances and this amount abruptly decreased in the middle and inner part of sapwood. Parallel with the decrease of starch grain, lipid droplets increased. However, in the heartwood, both parenchyma cell and wood fibers contained lipid droplets. Elemental analysis of the black substance in the outer heartwood was tried by SEM-EDXA method and it was revealed that no special element was contributed to the black streak of heartwood. |
หัวเรื่อง:ไม่มีชื่อไทย (ชื่ออังกฤษ : Seasonal Characteristics of Wood Formation in the Elite Genetic – Based Eucalyptus camaldulensis Dehnh.) ผู้เขียน:ดร.ธีระ วีณิน, รองศาสตราจารย์, Tadashi Nobuchi, Minoru Fujita, สมคิด สิริพัฒนดิลก สื่อสิ่งพิมพ์:pdf AbstractSeasonal characteristics of wood formation were investigated using the knife-cutting method in five superior clones of six years old Eucalyptus camaldulensis in the plantation of eastern Thailand. In the observation of wound tissue formed through knife insertion, cambial initials at the time of knife – cutting could be estimated. Based on these positions, pursuit of time course of wood formation or radial growth was carried out. In rainy season all clones showed active radial growth. The radial growth rate decreased in dry season. In the comparison of radial growth among five clones, clones 3 and 4 maintained better growth rate than other clones even in dry season. |
หัวเรื่อง:ไม่มีชื่อไทย (ชื่ออังกฤษ : Histochemical Study of Vascular Blockage in Flower Stems of Orchids in Relation to Vase Life) ผู้เขียน:ดร.สายชล เกตุษา, ศาสตราจารย์เกียรติคุณ , Tadashi Nobuchi สื่อสิ่งพิมพ์:pdf AbstractSections were cut from the basal and upper portions above the water level of aged flower stems of Dendrobium ‘Pompadour’ and from freshly cut flower stem. Observation of cross sections by light microscope showed the presence of vascular occlusion in aged flower stems. Occlusions at the basal portion were much more than at the upper portion. Occluding material at both the basal and upper portions above the water level contained both pectin and carbohydrate, while only at the upper portion contained phenol, Lignins were not found in the occluding material. |