Base de dados : MEDLINE
Pesquisa : B01.650.940.800.575.912.250.822.066 [Categoria DeCS]
Referências encontradas : 345 [refinar]
Mostrando: 1 .. 10   no formato [Detalhado]

página 1 de 35 ir para página                         

  1 / 345 MEDLINE  
              next record last record
seleciona
para imprimir
Fotocópia
Texto completo
[PMID]:29216963
[Au] Autor:Hassan A; Chen QB; Jiang T; Lyu BY; Li N; Li S; Shangguan ZY; Li YT; Jun ZL; Luo Q; Chen XY; Wang YY; Zeng CC; Yang J; Tahir MS
[Ad] Endereço:College of Landscape Architecture, Sichuan Agricultural University, Chengdu 611130, Sichuan, China.
[Ti] Título:Psychophysiological Effects of Bamboo Plants on Adults.
[So] Source:Biomed Environ Sci;30(11):846-850, 2017 Nov.
[Is] ISSN:0895-3988
[Cp] País de publicação:Netherlands
[La] Idioma:eng
[Ab] Resumo:The present study was conducted to clarify the psychophysiological relaxation effects of viewing bamboo on university students. Forty healthy Chinese participants enrolled in this study to clarify the psychophysiological relaxation effects of viewing bamboo. The effects of visual stimulation using a pot both with and without a bamboo were recorded by measuring the student's blood pressure, EEG and STAI. We observed that viewing bamboo plants resulted in significantly lower systolic (female, P < 0.001; male, P < 0.001; P < 0.05) and diastolic (female, P < 0.001; male, P < 0.001; P < 0.05) blood pressures, but no changes in the pulse rate (female, P = 0.09; male, P = 0.07; P > 0.05) were observed. The results of the EEG analysis indicated brainwave variation (all P < 0.05) and lower anxiety scores (P < 0.01) after 3 min of viewing bamboo compared with the control. These findings indicate that visual stimulation with bamboo plants induced psychophysiological relaxation effects on adults.
[Mh] Termos MeSH primário: Bambusa
Pressão Sanguínea/fisiologia
Frequência Cardíaca/fisiologia
Relaxamento
[Mh] Termos MeSH secundário: Adulto
Feminino
Seres Humanos
Masculino
[Pt] Tipo de publicação:JOURNAL ARTICLE
[Em] Mês de entrada:1803
[Cu] Atualização por classe:180305
[Lr] Data última revisão:
180305
[Sb] Subgrupo de revista:IM
[Da] Data de entrada para processamento:171209
[St] Status:MEDLINE
[do] DOI:10.3967/bes2017.114


  2 / 345 MEDLINE  
              first record previous record next record last record
seleciona
para imprimir
Fotocópia
Texto completo
[PMID]:29320501
[Au] Autor:Tang Y; Winkler JA; Viña A; Liu J; Zhang Y; Zhang X; Li X; Wang F; Zhang J; Zhao Z
[Ad] Endereço:Department of Geography, Environment, and Spatial Sciences, Michigan State University, East Lansing, Michigan, United States of America.
[Ti] Título:Uncertainty of future projections of species distributions in mountainous regions.
[So] Source:PLoS One;13(1):e0189496, 2018.
[Is] ISSN:1932-6203
[Cp] País de publicação:United States
[La] Idioma:eng
[Ab] Resumo:Multiple factors introduce uncertainty into projections of species distributions under climate change. The uncertainty introduced by the choice of baseline climate information used to calibrate a species distribution model and to downscale global climate model (GCM) simulations to a finer spatial resolution is a particular concern for mountainous regions, as the spatial resolution of climate observing networks is often insufficient to detect the steep climatic gradients in these areas. Using the maximum entropy (MaxEnt) modeling framework together with occurrence data on 21 understory bamboo species distributed across the mountainous geographic range of the Giant Panda, we examined the differences in projected species distributions obtained from two contrasting sources of baseline climate information, one derived from spatial interpolation of coarse-scale station observations and the other derived from fine-spatial resolution satellite measurements. For each bamboo species, the MaxEnt model was calibrated separately for the two datasets and applied to 17 GCM simulations downscaled using the delta method. Greater differences in the projected spatial distributions of the bamboo species were observed for the models calibrated using the different baseline datasets than between the different downscaled GCM simulations for the same calibration. In terms of the projected future climatically-suitable area by species, quantification using a multi-factor analysis of variance suggested that the sum of the variance explained by the baseline climate dataset used for model calibration and the interaction between the baseline climate data and the GCM simulation via downscaling accounted for, on average, 40% of the total variation among the future projections. Our analyses illustrate that the combined use of gridded datasets developed from station observations and satellite measurements can help estimate the uncertainty introduced by the choice of baseline climate information to the projected changes in species distribution.
[Mh] Termos MeSH primário: Biodiversidade
Ecossistema
Incerteza
[Mh] Termos MeSH secundário: Animais
Bambusa
Mudança Climática
Probabilidade
[Pt] Tipo de publicação:JOURNAL ARTICLE; RESEARCH SUPPORT, NON-U.S. GOV'T
[Em] Mês de entrada:1801
[Cu] Atualização por classe:180129
[Lr] Data última revisão:
180129
[Sb] Subgrupo de revista:IM
[Da] Data de entrada para processamento:180111
[St] Status:MEDLINE
[do] DOI:10.1371/journal.pone.0189496


  3 / 345 MEDLINE  
              first record previous record next record last record
seleciona
para imprimir
Fotocópia
Texto completo
[PMID]:28317749
[Au] Autor:Gong W; Ran Z; Ye F; Zhao G
[Ad] Endereço:College of Food Science, Southwest University, Chongqing 400715, People's Republic of China; Normal College of Jishou University, Jishou 416000, People's Republic of China.
[Ti] Título:Lignin from bamboo shoot shells as an activator and novel immobilizing support for α-amylase.
[So] Source:Food Chem;228:455-462, 2017 Aug 01.
[Is] ISSN:0308-8146
[Cp] País de publicação:England
[La] Idioma:eng
[Ab] Resumo:This study examined the feasibility of α-amylase activation and immobilization, using lignin from bamboo shoot shells (BSS). Our results demonstrated that BSS lignin is an excellent α-amylase activator and it elevated α-amylase activity more than two-fold at a concentration of 5mg/ml. For immobilization of α-amylase via adsorption, BSS lignin was incubated in an α-amylase solution (5mg/ml) for 20min, and the maximum specific activity, amount of loaded protein and activity recovery were 92.4U/mg, 19.0mg/g and 111%, respectively. In contrast to its free counterpart, immobilized α-amylase improved the catalytic efficiency and storage stability, under comparable working conditions (temperature and pH). Regarding its convenient usage, immobilized enzyme can be suspended in advance, but a suspension incubated at 60°C should be used within 30min. The residual activity after 14 re-uses remained at a reasonable level (53.2%). In conclusion, this study reveals a novel support for enzyme immobilization.
[Mh] Termos MeSH primário: Bambusa/química
Enzimas Imobilizadas/metabolismo
Lignina/química
alfa-Amilases/metabolismo
[Mh] Termos MeSH secundário: Estabilidade Enzimática
[Pt] Tipo de publicação:JOURNAL ARTICLE
[Nm] Nome de substância:
0 (Enzymes, Immobilized); 9005-53-2 (Lignin); EC 3.2.1.1 (alpha-Amylases)
[Em] Mês de entrada:1705
[Cu] Atualização por classe:170501
[Lr] Data última revisão:
170501
[Sb] Subgrupo de revista:IM
[Da] Data de entrada para processamento:170321
[St] Status:MEDLINE


  4 / 345 MEDLINE  
              first record previous record next record last record
seleciona
para imprimir
Fotocópia
Texto completo
[PMID]:28306740
[Au] Autor:Fei Y; Hou R; Spotila JR; Paladino FV; Qi D; Zhang Z
[Ad] Endereço:Department of Biodiversity, Earth and Environmental Science, Drexel University, Philadelphia, PA United States of America.
[Ti] Título:Metabolic rate of the red panda, Ailurus fulgens, a dietary bamboo specialist.
[So] Source:PLoS One;12(3):e0173274, 2017.
[Is] ISSN:1932-6203
[Cp] País de publicação:United States
[La] Idioma:eng
[Ab] Resumo:The red panda (Ailurus fulgens) has a similar diet, primarily bamboo, and shares the same habitat as the giant panda, Ailuropoda melanoleuca. There are considerable efforts underway to understand the ecology of the red panda and to increase its populations in natural reserves. Yet it is difficult to design an effective strategy for red panda reintroduction if we do not understand its basic biology. Here we report the resting metabolic rate of the red panda and find that it is higher than previously measured on animals from a zoo. The resting metabolic rate was 0.290 ml/g/h (range 0.204-0.342) in summer and 0.361 ml/g/h in winter (range 0.331-0.406), with a statistically significant difference due to season and test temperature. Temperatures in summer were probably within the thermal neutral zone for metabolism but winter temperatures were below the thermal neutral zone. There was no difference in metabolic rate between male and female red pandas and no difference due to mass. Our values for metabolic rate were much higher than those measured by McNab for 2 red pandas from a zoo. The larger sample size (17), more natural conditions at the Panda Base and improved accuracy of the metabolic instruments provided more accurate metabolism measurements. Contrary to our expectations based on their low quality bamboo diet, the metabolic rates of red pandas were similar to mammals of the same size. Based on their metabolic rates red pandas would not be limited by their food supply in natural reserves.
[Mh] Termos MeSH primário: Bambusa
Ursidae/metabolismo
[Mh] Termos MeSH secundário: Animais
[Pt] Tipo de publicação:JOURNAL ARTICLE
[Em] Mês de entrada:1709
[Cu] Atualização por classe:170907
[Lr] Data última revisão:
170907
[Sb] Subgrupo de revista:IM
[Da] Data de entrada para processamento:170318
[St] Status:MEDLINE
[do] DOI:10.1371/journal.pone.0173274


  5 / 345 MEDLINE  
              first record previous record next record last record
seleciona
para imprimir
Fotocópia
Texto completo
[PMID]:28063101
[Au] Autor:Ray SS; Ali MN; Mukherjee S; Chatterjee G; Banerjee M
[Ad] Endereço:IRDM Faculty Centre, Ramakrishna Mission Vivekananda University, Ramakrishna Mission Ashrama, Narendrapur, Kolkata, 700103, India.
[Ti] Título:Elimination and molecular identification of endophytic bacterial contaminants during in vitro propagation of Bambusa balcooa.
[So] Source:World J Microbiol Biotechnol;33(2):31, 2017 Feb.
[Is] ISSN:1573-0972
[Cp] País de publicação:Germany
[La] Idioma:eng
[Ab] Resumo:Bambusa balcooa is an economically important, multipurpose bamboo species, decidedly used in construction industry. Availability of natural bamboo is depleting very rapidly due to accelerated deforestation and its unrestrained use. The large number and timely supply of saplings are the need of the hour for the restoration of bamboo stands. Micropropagation, being the potent alternative for season independent rapid regeneration, is restricted in bamboo because of endophytic contamination. An in vitro attempt has been taken to overcome the endophytic contamination by using broad spectrum antibiotics as surface sterilant as well as a media component. Ampicillin sodium salt (5 mg/ml for 30 min) as a surface sterilant was found as the best treatment for high bud breaking (80%) coupled with high branching and low contamination (20%) but it was found ineffective to control the contamination during multiplication stage. Then, two endophytes were isolated and minimum inhibitory concentration was determined through antibiotic susceptibility test for successful eradication at multiplication stage. Finally, contamination free cultures were obtained when streptocycline (100 µg/ml) and gentamicin sulphate (75 µg/ml) were added into the medium. The two isolated endophytes, BB1 and BB2, were identified through 16S rDNA techniques and NCBI-BLAST algorithm with 99% sequence similarity with those of Janibacter sp. (KX423734) and Serratia marcescens strain (KX423735). To our knowledge, this is the first report for B. balcooa where antibiotics were used as surface sterilant as well as medium component, to control endophytic bacterial contaminants, followed by their identification.
[Mh] Termos MeSH primário: Actinobacteria/efeitos dos fármacos
Antibacterianos/farmacologia
Bambusa/microbiologia
Endófitos/efeitos dos fármacos
Serratia marcescens/efeitos dos fármacos
[Mh] Termos MeSH secundário: Actinobacteria/genética
Actinobacteria/crescimento & desenvolvimento
Actinobacteria/isolamento & purificação
Bambusa/efeitos dos fármacos
Bambusa/crescimento & desenvolvimento
DNA Bacteriano/genética
DNA Ribossômico/genética
Endófitos/genética
Endófitos/crescimento & desenvolvimento
Endófitos/isolamento & purificação
Testes de Sensibilidade Microbiana
Filogenia
Análise de Sequência de DNA
Homologia de Sequência do Ácido Nucleico
Serratia marcescens/genética
Serratia marcescens/crescimento & desenvolvimento
Serratia marcescens/isolamento & purificação
[Pt] Tipo de publicação:JOURNAL ARTICLE
[Nm] Nome de substância:
0 (Anti-Bacterial Agents); 0 (DNA, Bacterial); 0 (DNA, Ribosomal)
[Em] Mês de entrada:1703
[Cu] Atualização por classe:171102
[Lr] Data última revisão:
171102
[Sb] Subgrupo de revista:IM
[Da] Data de entrada para processamento:170108
[St] Status:MEDLINE
[do] DOI:10.1007/s11274-016-2196-z


  6 / 345 MEDLINE  
              first record previous record next record last record
seleciona
para imprimir
Fotocópia
Texto completo
[PMID]:28050737
[Au] Autor:Lin W; Wang L; Yan W; Chen L; Chen H; Yang W; Guo M; Wu Z; Yang L; Xie L
[Ad] Endereço:State Key Laboratory of Ecological Pest Control for Fujian and Taiwan Crops, Fujian Agriculture and Forestry University, Fuzhou, 350002, China.
[Ti] Título:Identification and characterization of Bamboo mosaic virus isolates from a naturally occurring coinfection in Bambusa xiashanensis.
[So] Source:Arch Virol;162(5):1335-1339, 2017 May.
[Is] ISSN:1432-8798
[Cp] País de publicação:Austria
[La] Idioma:eng
[Ab] Resumo:Bamboo mosaic virus (BaMV) is a well-characterized virus and a model of virus-host interaction in plants. Here, we identified naturally occurring BaMV isolates from Fujian Province, China and furthermore describe a naturally occurring BaMV coinfection in bamboo (Bambusa xiashanensis) plants. Two different types of BaMV were identified, represented by isolates BaMV-XSNZHA7 (X7) and BaMV-XSNZHA10 (X10). The phylogenetic relationships between X7- and X10-like isolates and published BaMV isolates were determined based on genomic RNA and amino acid sequences. Three clusters were identified, indicating that BaMV is highly diverse. The in planta viral replication kinetics were determined for X7 and X10 in single infections and in an X7/X10 coinfection. The peak viral load during coinfection was significantly greater than that during single infection with either virus and contained a slightly higher proportion of X10 virus than X7, suggesting that X10-like viruses may have a fitness advantage when compared to X7-like viruses.
[Mh] Termos MeSH primário: Bambusa/virologia
Doenças das Plantas/virologia
Potexvirus/classificação
Potexvirus/genética
RNA Viral/genética
[Mh] Termos MeSH secundário: Sequência de Aminoácidos/genética
Sequência de Bases
China
Coinfecção/virologia
Interações Hospedeiro-Patógeno
Filogenia
Potexvirus/isolamento & purificação
Análise de Sequência de RNA
Carga Viral
[Pt] Tipo de publicação:JOURNAL ARTICLE
[Nm] Nome de substância:
0 (RNA, Viral)
[Em] Mês de entrada:1704
[Cu] Atualização por classe:170428
[Lr] Data última revisão:
170428
[Sb] Subgrupo de revista:IM
[Da] Data de entrada para processamento:170105
[St] Status:MEDLINE
[do] DOI:10.1007/s00705-016-3191-2


  7 / 345 MEDLINE  
              first record previous record next record last record
seleciona
para imprimir
Fotocópia
Texto completo
[PMID]:27883953
[Au] Autor:Chen C; Miao W; Zhou C; Wu H
[Ad] Endereço:School of Environmental Science & Engineering, Huazhong University of Science and Technology, 1037 Luoyu Road, Wuhan, Hubei 430074, China.
[Ti] Título:Thermogravimetric pyrolysis kinetics of bamboo waste via Asymmetric Double Sigmoidal (Asym2sig) function deconvolution.
[So] Source:Bioresour Technol;225:48-57, 2017 Feb.
[Is] ISSN:1873-2976
[Cp] País de publicação:England
[La] Idioma:eng
[Ab] Resumo:Thermogravimetric kinetic of bamboo waste (BW) pyrolysis has been studied using Asymmetric Double Sigmoidal (Asym2sig) function deconvolution. Through deconvolution, BW pyrolytic profiles could be separated into three reactions well, each of which corresponded to pseudo hemicelluloses (P-HC), pseudo cellulose (P-CL), and pseudo lignin (P-LG) decomposition. Based on Friedman method, apparent activation energy of P-HC, P-CL, P-LG was found to be 175.6kJ/mol, 199.7kJ/mol, and 158.4kJ/mol, respectively. Energy compensation effects (lnk vs. E ) of pseudo components were in well linearity, from which pre-exponential factors (k ) were determined as 6.22E+11s (P-HC), 4.50E+14s (P-CL) and 1.3E+10s (P-LG). Integral master-plots results showed pyrolytic mechanism of P-HC, P-CL, and P-LG was reaction order of f(α)=(1-α) , f(α)=1-α and f(α)=(1-α) (n=6-8), respectively. Mechanism of P-HC and P-CL could be further reconstructed to n-th order Avrami-Erofeyev model of f(α)=0.62(1-α)[-ln(1-α)] (n=0.62) and f(α)=1.08(1-α)[-ln(1-α)] (n=1.08). Two-steps reaction was more suitable for P-LG pyrolysis.
[Mh] Termos MeSH primário: Bambusa/química
Modelos Teóricos
Temperatura Ambiente
Termogravimetria/métodos
Resíduos/análise
[Mh] Termos MeSH secundário: Simulação por Computador
Cinética
[Pt] Tipo de publicação:JOURNAL ARTICLE
[Nm] Nome de substância:
0 (Waste Products)
[Em] Mês de entrada:1702
[Cu] Atualização por classe:170206
[Lr] Data última revisão:
170206
[Sb] Subgrupo de revista:IM
[Da] Data de entrada para processamento:161125
[St] Status:MEDLINE


  8 / 345 MEDLINE  
              first record previous record next record last record
seleciona
para imprimir
Fotocópia
Texto completo
[PMID]:27743256
[Au] Autor:Lin W; Yan W; Yang W; Yu C; Chen H; Zhang W; Wu Z; Yang L; Xie L
[Ad] Endereço:Fujian Key Lab of Plant Virology, Institute of Plant Virology, Fujian Agriculture and Forestry University, Fuzhou, 350002, China.
[Ti] Título:Characterisation of siRNAs derived from new isolates of bamboo mosaic virus and their associated satellites in infected ma bamboo (Dendrocalamus latiflorus).
[So] Source:Arch Virol;162(2):505-510, 2017 Feb.
[Is] ISSN:1432-8798
[Cp] País de publicação:Austria
[La] Idioma:eng
[Ab] Resumo:We characterised the virus-derived small interfering RNAs (vsiRNA) of bamboo mosaic virus (Ba-vsiRNAs) and its associated satellite RNA (satRNA)-derived siRNAs (satsiRNAs) in a bamboo plant (Dendrocalamus latiflorus) by deep sequencing. Ba-vsiRNAs and satsiRNAs of 21-22 nt in length, with both (+) and (-) polarity, predominated. The 5'-terminal base of Ba-vsiRNA was biased towards A, whereas a bias towards C/U was observed in sense satsiRNAs, and towards A in antisense satsiRNAs. A large set of bamboo genes were identified as potential targets of Ba-vsiRNAs and satsiRNAs, revealing RNA silencing-based virus-host interactions in plants. Moreover, we isolated and characterised new isolates of bamboo mosaic virus (BaMV; 6,350 nt) and BaMV-associated satRNA (satBaMV; 834 nt), designated BaMV-MAZSL1 and satBaMV-MAZSL1, respectively.
[Mh] Termos MeSH primário: Bambusa/virologia
Genes de Plantas
Potexvirus/genética
RNA Satélite/genética
RNA Interferente Pequeno/genética
RNA Viral/genética
[Mh] Termos MeSH secundário: Sequenciamento de Nucleotídeos em Larga Escala
Interações Hospedeiro-Patógeno
Fases de Leitura Aberta
Doenças das Plantas/virologia
Potexvirus/classificação
Potexvirus/isolamento & purificação
Interferência de RNA
[Pt] Tipo de publicação:JOURNAL ARTICLE
[Nm] Nome de substância:
0 (RNA, Satellite); 0 (RNA, Small Interfering); 0 (RNA, Viral)
[Em] Mês de entrada:1702
[Cu] Atualização por classe:170214
[Lr] Data última revisão:
170214
[Sb] Subgrupo de revista:IM
[Da] Data de entrada para processamento:161016
[St] Status:MEDLINE
[do] DOI:10.1007/s00705-016-3092-4


  9 / 345 MEDLINE  
              first record previous record next record last record
seleciona
para imprimir
Fotocópia
[PMID]:27590499
[Au] Autor:Lim D; Cho Y; Kim W; Jeong S; Jang YP; Kim J
[Ad] Endereço:Department of Korean Physiology, College of Pharmacy, Kyung Hee University, Seoul 02447, Republic of Korea.
[Ti] Título:Original Research: Extract of Bambusae Caulis in Taeniam inhibits cigarette smoke-induced pulmonary and intestinal inflammation.
[So] Source:Exp Biol Med (Maywood);242(1):102-112, 2017 Jan.
[Is] ISSN:1535-3699
[Cp] País de publicação:England
[La] Idioma:eng
[Ab] Resumo:The pulmonary and intestinal systems have several characteristics in common. It is believed that these similarities somehow function to cause pulmonary-intestinal crosstalk during inflammation. Many studies have shown that pulmonary disease occurs in association with inflammatory bowel disease more often than is commonly recognized. Bambusae Caulis in Taeniam, a medicinal herb originated from the inner bark of Phyllostachys nigra var. henosis (Milford) Rendle (Poaceae), has been used to cure fever, diarrhea, and chest inflammation in Korea as well as in China. Cigarette smoke is a well-known risk factor for several inflammatory disorders. In this study, we induced pulmonary and bowel inflammation in mice using cigarette smoke and investigated whether Bambusae Caulis in Taeniam extract modulates the inflammatory response in both the lung and the bowel. C57BL/6 mice were exposed to cigarette smoke for 90 min per day for three weeks, and Bambusae Caulis in Taeniam extract was administered via oral injection 2 h before cigarette smoke exposure. The bronchoalveolar lavage cells were counted and hematoxylin and eosin staining were performed. Levels of inflammatory mediators in lung and large intestine were determined by enzyme-linked immunosorbent assay, real-time polymerase chain reaction, and Western blotting. Our results showed that Bambusae Caulis in Taeniam attenuated cigarette smoke-induced inflammatory response in both the lung and the bowel of mice by inhibiting the production of pro-inflammatory cytokines, chemokines, and protease as well as NF-κB signaling factor. Therefore, we suggest that Bambusae Caulis in Taeniam extract might be a candidate therapeutic agent for inhibiting pulmonary and intestinal inflammation.
[Mh] Termos MeSH primário: Bambusa/química
Gastroenterite/tratamento farmacológico
Extratos Vegetais/farmacologia
Pneumonia/tratamento farmacológico
Fumar/efeitos adversos
[Mh] Termos MeSH secundário: Animais
Peso Corporal/efeitos dos fármacos
Líquido da Lavagem Broncoalveolar/química
Quimiocinas/metabolismo
Cromatografia Líquida de Alta Pressão
Colo/efeitos dos fármacos
Colo/patologia
Citocinas/genética
Citocinas/metabolismo
Modelos Animais de Doenças
Feminino
Gastroenterite/induzido quimicamente
Gastroenterite/patologia
Pulmão/efeitos dos fármacos
Pulmão/patologia
Camundongos Endogâmicos C57BL
Extratos Vegetais/análise
Pneumonia/induzido quimicamente
Pneumonia/patologia
[Pt] Tipo de publicação:JOURNAL ARTICLE
[Nm] Nome de substância:
0 (Chemokines); 0 (Cytokines); 0 (Plant Extracts)
[Em] Mês de entrada:1706
[Cu] Atualização por classe:170714
[Lr] Data última revisão:
170714
[Sb] Subgrupo de revista:IM
[Da] Data de entrada para processamento:160904
[St] Status:MEDLINE


  10 / 345 MEDLINE  
              first record previous record
seleciona
para imprimir
Fotocópia
PubMed Central Texto completo
Texto completo
[PMID]:27583451
[Au] Autor:Wang HC; Chou CY; Chiou CR; Tian G; Chiu CY
[Ad] Endereço:Biodiversity Research Center, Academia Sinica, Nankang, Taipei 11529, Taiwan.
[Ti] Título:Humic Acid Composition and Characteristics of Soil Organic Matter in Relation to the Elevation Gradient of Moso Bamboo Plantations.
[So] Source:PLoS One;11(9):e0162193, 2016.
[Is] ISSN:1932-6203
[Cp] País de publicação:United States
[La] Idioma:eng
[Ab] Resumo:Studying the influence of climatic and/or site-specific factors on soil organic matter (SOM) along an elevation gradient is important for understanding the response of SOM to global warming. We evaluated the composition of SOM and structure of humic acids along an altitudinal gradient from 600 to 1400 m in moso bamboo (Phyllostachys edulis) plantations in central Taiwan using NMR spectroscopy and photometric analysis. Total organic C and total nitrogen (N) content increased with increasing elevation. Aromaticity decreased and ΔlogK (the logarithm of the absorbance ratio of humic acids at 400 and 600 nm) increased with increasing elevation, which suggests that SOM humification decreased with increasing elevation. High temperature at low elevations seemed to enhance the decomposition (less accumulation of total organic C and N) and humification (high aromaticity and low ΔlogK). The alkyl-C/O-alkyl-C (A/O-A) ratio of humic acids increased with increasing elevation, which suggests that SOM humification increased with increasing elevation; this finding was contrary to the trend observed for ΔlogK and aromaticity. Such a discrepancy might be due to the relatively greater remaining of SOM derived from high alkyl-C broadleaf litter of previous forest at high elevations. The ratio of recalcitrant C to total organic C was low at low elevations, possibly because of enhanced decomposition of recalcitrant SOM from the previous broadleaf forest during long-term intensive cultivation and high temperature. Overall, the change in SOM pools and in the rate of humification with elevation was primarily affected by changes in climatic conditions along the elevation gradient in these bamboo plantations. However, when the composition of SOM, as assessed by NMR spectroscopy and photometric analysis was considered, site-specific factors such as residual SOM from previous forest and intensive cultivation history could also have an important effect on the humic acid composition and humification of SOM.
[Mh] Termos MeSH primário: Bambusa
Substâncias Húmicas
Solo/química
[Mh] Termos MeSH secundário: Espectroscopia de Ressonância Magnética
Taiwan
[Pt] Tipo de publicação:JOURNAL ARTICLE
[Nm] Nome de substância:
0 (Humic Substances); 0 (Soil)
[Em] Mês de entrada:1708
[Cu] Atualização por classe:171116
[Lr] Data última revisão:
171116
[Sb] Subgrupo de revista:IM
[Da] Data de entrada para processamento:160902
[St] Status:MEDLINE
[do] DOI:10.1371/journal.pone.0162193



página 1 de 35 ir para página                         
   


Refinar a pesquisa
  Base de dados : MEDLINE Formulário avançado   

    Pesquisar no campo  
1  
2
3
 
           



Search engine: iAH v2.6 powered by WWWISIS

BIREME/OPAS/OMS - Centro Latino-Americano e do Caribe de Informação em Ciências da Saúde