The Experts below are selected from a list of 2091 Experts worldwide ranked by ideXlab platform
Gabriel Villalobos - One of the best experts on this subject based on the ideXlab platform.
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acoustic emission signals resulting from the drying induced fractures of Phyllostachys pubescens bamboo evidence of scale free phenomena
Wood Science and Technology, 2016Co-Authors: Gabriel VillalobosAbstract:Acoustic Emission (AE) is a noninvasive tool for evaluation of damage and fracture. In this paper, results of AE study of the drying process of Phyllostachys pubescens bamboo are reported. The histogram of experimental squared voltage distributions follows a power law with an exponent of \(-1.16\). The histogram of maximum amplitudes \(V_\mathrm{max}\) usually studied in the AE literature also shows a power law with a slope of \(-2.4\) (b-value of 2.4). This is reminiscent of scale free phenomena. Another novel aspect for bamboo literature is the calculation of the average signal shape for different time spans of the system. The shape has an asymmetrical shape for both long- and short-span signals, but shows a symmetrical shape for middle-span signals. This is an indication of a reinforcing feedback process, known in the statistical mechanics of fracture as an avalanche.
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acoustic emission signals resulting from the drying induced fractures of Phyllostachys pubescens bamboo evidence of scale free phenomena
arXiv: Soft Condensed Matter, 2015Co-Authors: Gabriel VillalobosAbstract:I have performed experimental measurements of acoustic emission signals resulting from the drying process of Phyllostachys Pubescens bamboo. The emphasis was on identifying individual events, and characterize them according to their time span and energy release. My results show a histogram of experimental squared voltage distributions nicely fit into a power law with exponent of $-1.16$, reminiscent of scale free phenomena. I have also calculated the average signal shape, for different time spans of the system, and found an asymmetrical form. The experimental evidence points to the system having an isolated large crack at the beginning of the simulation.
Geoff G Wang - One of the best experts on this subject based on the ideXlab platform.
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moso bamboo Phyllostachys edulis carriere j houzeau invasion affects soil phosphorus dynamics in adjacent coniferous forests in subtropical china
Annals of Forest Science, 2018Co-Authors: Hankun Wang, Zhijian Zhang, Guoxian Huang, Qin Zou, Fanqian Kong, Yuanqiu Liu, Geoff G WangAbstract:Key message The invasion of moso bamboo ( Phyllostachys edulis (Carriere) J. Houzeau) into neighboring Cryptomeria japonica (L. f.) D. Don plantations significantly altered soil P status and dynamics. This alteration in phosphorus dynamics must be considered when assessing the ecological consequence of moso bamboo invasion in subtropical China.
Zhenhua Peng - One of the best experts on this subject based on the ideXlab platform.
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developing genome wide microsatellite markers of bamboo and their applications on molecular marker assisted taxonomy for accessions in the genus Phyllostachys
Scientific Reports, 2015Co-Authors: Hansheng Zhao, Li Yang, Zhenhua Peng, Huayu Sun, Xianghua Yue, Yongfeng Lou, Lili Dong, Lili Wang, Zhimin GaoAbstract:Developing genome-wide microsatellite markers of bamboo and their applications on molecular marker assisted taxonomy for accessions in the genus Phyllostachys
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characterization of the floral transcriptome of moso bamboo Phyllostachys edulis at different flowering developmental stages by transcriptome sequencing and rna seq analysis
PLOS ONE, 2014Co-Authors: Jian Gao, Ying Zhang, Chunling Zhang, Zhenhua PengAbstract:Background As an arborescent and perennial plant, Moso bamboo (Phyllostachys edulis (Carriere) J. Houzeau, synonym Phyllostachys heterocycla Carriere) is characterized by its infrequent sexual reproduction with flowering intervals ranging from several to more than a hundred years. However, little bamboo genomic research has been conducted on this due to a variety of reasons. Here, for the first time, we investigated the transcriptome of developing flowers in Moso bamboo by using high-throughput Illumina GAII sequencing and mapping short reads to the Moso bamboo genome and reference genes. We performed RNA-seq analysis on four important stages of flower development, and obtained extensive gene and transcript abundance data for the floral transcriptome of this key bamboo species. Results We constructed a cDNA library using equal amounts of RNA from Moso bamboo leaf samples from non-flowering plants (CK) and mixed flower samples (F) of four flower development stages. We generated more than 67 million reads from each of the CK and F samples. About 70% of the reads could be uniquely mapped to the Moso bamboo genome and the reference genes. Genes detected at each stage were categorized to putative functional categories based on their expression patterns. The analysis of RNA-seq data of bamboo flowering tissues at different developmental stages reveals key gene expression properties during the flower development of bamboo. Conclusion We showed that a combination of transcriptome sequencing and RNA-seq analysis was a powerful approach to identifying candidate genes related to floral transition and flower development in bamboo species. The results give a better insight into the mechanisms of Moso bamboo flowering and ageing. This transcriptomic data also provides an important gene resource for improving breeding for Moso bamboo.
Eiichi Shibata - One of the best experts on this subject based on the ideXlab platform.
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biology and life history of the bamboo gall maker aiolomorphus rhopaloides walker hymenoptera eurytomidae
2006Co-Authors: Eiichi ShibataAbstract:Aiolomorphus rhopaloides (Hymenoptera: Eurytomidae) induces galls on two species of bamboo, Phyllostachys heterocycla and Phyllostachys bambusoides (Monocotyledoneae: Gramineae) in Japan. Our work showed eight hymenopteran species, including A. rhopaloides, emerge from bamboo galls. Larvae of A. rhopaloides appear in galls in July, with the percentage of larvae decreasing in September, before over-wintering as pupae. The percentage of parasitoids in galls is low in July, but increases until winter. The percentages of inquiline Diomorus aiolomorphi emerging from the overwintering galls are relatively high, suggesting that inquilines might be a key mortality factor of bamboo galls. Females of A. rhopaloides with ca. 80 mature eggs in their ovaries start emerging from galls from mid-April to early May just after the bud burst of P. heterocycla and emergence continues during bud elongation. Phenological asynchrony between adult emergence and bud burst may have a large influence on the population dynamics of the gall maker A. rhopaloides; a slight advance or delay in emergence may reduce suitable oviposition sites, causing population fluctuations. Although more bamboo galls are found on longer branches, selection of longer branches for oviposition does not result in higher offspring survival.
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sampling procedure for density estimation of bamboo galls induced by aiolomorphus rhopaloides hymenoptera eurytomidae in a bamboo stand
Journal of Forest Research, 2003Co-Authors: Eiichi ShibataAbstract:To establish a sampling procedure for estimating the density of bamboo galls induced by Aiolomorphus rhopaloides Walker (Hymenoptera: Eurytomidae) in a stand of bamboo Phyllostachys heterocycla (Ca...
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synchronization of shoot elongation in the bamboo Phyllostachys heterocycla monocotyledoneae gramineae and emergence of the gall maker aiolomorphus rhopaloides hymenoptera eurytomidae and its inquiline diomorus aiolomorphi hymenoptera torymidae
Environmental Entomology, 2001Co-Authors: Eiichi ShibataAbstract:Adult emergence of the gall maker Aiolomorphus rhopaloides Walker and its inquiline, Diomorus aiolomorphi Kamijo, was examined in three stands of the bamboo, Phyllostachys heterocycla Matsumura. A. rhopaloides emerged from the galls from mid-April to early May, coinciding with the bamboo bud elongation period. This synchronization suggests that eggs laid in the new shoots have a nutritional advantage for resulting larvae, and that a slight advance or delay in emergence may reduce suitable oviposition sites, causing population fluctuations. D. aiolomorphi emerged from late April to early June during the bamboo shoot elongation period and females could lay eggs in elongated shoots providing relatively higher nutrition for larvae. The difference in the gall density on P. heterocycla and P. bambusoides Siebold and Zuccarini is explained on the basis of synchronization with host plant phenology.
Roger Ruan - One of the best experts on this subject based on the ideXlab platform.
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physicochemical characterization of hemicelluloses from bamboo Phyllostachys pubescens mazel stem
Industrial Crops and Products, 2012Co-Authors: Hong Peng, Na Wang, Zhengrong Hu, Ziping Yu, Jinsheng Zhang, Roger RuanAbstract:Abstract In this paper, hemicelluloses from bamboo (Phyllostachys pubescens Mazel) stem aged six months were sequentially extracted with hot water, 2% KOH, and 5% NaOH. The water-soluble hemicelluloses H1, and four alkali-soluble hemicellulosic fractions H2, H3, H4 and H5 were obtained, achieving a total yield of 59.60% based on the original hemicelluloses. Sugar composition analysis showed that the hemicelluloses were mainly composed of xylose (44.39–72.71%), arabinose (26.36–51.87%), ribose (0.93–2.72%), and uronic acid (0.29–5.27%). The structures of the hemicelluloses were determined to be mainly arabinoxylan, using the FT-IR and NMR techniques. The AFM images of fraction H3 revealed a distribution of spherical nanoparticles with different sizes, while the fraction H2 had helix rod and random coil feature. The SEM characterizations indicated that the fraction H1 displayed spherical particles while the fraction H3 had mainly flat particles at high magnification. Thermal stability was also analyzed using TG–DTG method and first-order kinetics model.