期刊文献+
共找到21,551篇文章
< 1 2 250 >
每页显示 20 50 100
Theoretical Analysis on Deflection and Bearing Capacity of Prestressed Bamboo-Steel Composite Beams
1
作者 Qifeng Shan Ming Mao Yushun Li 《Journal of Renewable Materials》 EI CAS 2024年第1期149-166,共18页
A theoretical analysis of upward deflection and midspan deflection of prestressed bamboo-steel composite beams is presented in this study.The deflection analysis considers the influences of interface slippage and shea... A theoretical analysis of upward deflection and midspan deflection of prestressed bamboo-steel composite beams is presented in this study.The deflection analysis considers the influences of interface slippage and shear deformation.Furthermore,the calculation model for flexural capacity is proposed considering the two stages of loading.The theoretical results are verified with 8 specimens considering different prestressed load levels,load schemes,and prestress schemes.The results indicate that the proposed theoretical analysis provides a feasible prediction of the deflection and bearing capacity of bamboo-steel composite beams.For deflection analysis,the method considering the slippage and shear deformation provides better accuracy.The theoretical method for bearing capacity matches well with the test results,and the relative errors in the serviceability limit state and ultimate limit state are 4.95%and 5.85%,respectively,which meet the accuracy requirements of the engineered application. 展开更多
关键词 bamboo scrimber composite beam PRESTRESS DEFLECTIon bearing capacity
下载PDF
Harnessing the Market Potential of the Bamboo Industry in Central Luzon, Philippines: An Analysis of the Internal and External Environment
2
作者 Edgelly Galvez Vitug Sarah Calma Alvarez 《Open Journal of Ecology》 2024年第5期395-418,共24页
The bamboo industry in Central Luzon holds significant promise for economic development and environmental sustainability. This study aims to analyze the internal and external factors influencing the bamboo industry in... The bamboo industry in Central Luzon holds significant promise for economic development and environmental sustainability. This study aims to analyze the internal and external factors influencing the bamboo industry in the region through SWOT and PESTLE analyses. Based on a focus group discussion involving key industry players, the study explores the industry’s strengths, weaknesses, opportunities, and threats, as well as political, economic, social, technological, legal, and environmental factors. Findings reveal the importance of comprehensive strategies that address political stability, economic growth, consumer awareness, technological advancement, legal compliance, and environmental sustainability. Recommendations include capacity-building for production and marketing, the establishment of bamboo treatment facilities, and advocacy for supportive policies. By addressing these factors, the bamboo industry in Central Luzon can realize its potential for socio-economic development and environmental stewardship. 展开更多
关键词 bamboo SWOT Analysis PESTLE Analysis Business Environment Value Addition SUSTAINABILITY Market Potential
下载PDF
Experimental Study on the Axial Compression Performance of Bamboo Scrimber Columns Embedded with Steel Reinforcing Bars
3
作者 Xueyan Lin Mingtao Wu +2 位作者 Guodong Li Nan Guo Lidan Mei 《Structural Durability & Health Monitoring》 EI 2024年第6期805-833,共29页
In this paper,a new type of bamboo scrimber column embedded with steel bars(rebars)was proposed,and the compression performance was improved by pre-embedding rebars during the preparation of the columns.The effects of... In this paper,a new type of bamboo scrimber column embedded with steel bars(rebars)was proposed,and the compression performance was improved by pre-embedding rebars during the preparation of the columns.The effects of the slenderness ratio and the reinforcement ratio on the axial compression performance of reinforced bamboo scrimber columns were studied by axial compression tests on 28 specimens.The results showed that the increase in the slenderness ratio had a significant negative effect on the axial compression performance of the columns.When the slenderness ratio increased from 19.63 to 51.96,the failure mode changed from strength failure to buckling failure,and the maximum bearing capacity decreased by 43.03%.The axial compression performance of the reinforced bamboo scrimber columns did not significantly improve at a slenderness ratio of 19.63,but the opposite was true at slenderness ratios of 36.95 and 51.96.When the reinforcement ratio increased from 0%to 4.52%,the bearing capacity of those with a slenderness ratio of 51.96 increased by up to 16.99%,and the stiffness and ductility were also improved.Finally,based on existing specifications,two modification parameters,the overall elastic modulus Ec and the combined strength fcc,were introduced to establish a calculation method for the bearing capacity of the reinforced bamboo scrimber columns.The calculation results were compared with the test results,and the results showed that the proposed calculation models can more accurately predict the bearing capacity. 展开更多
关键词 bamboo scrimber column steel bar axial compression performance theoretical model
下载PDF
Inhibition of Propionibacterium acnes by refined bamboo vinegar and preparation of the slow-release system with bamboo charcoal as the carrier
4
作者 Ziyi Li Yanan Wang Sheng Zhang 《Journal of Dermatologic Science and Cosmetic Technology》 2024年第2期17-25,共9页
Background:Acne vulgaris is one of the most common skin diseases that can significantly impact a considerable proportion of individuals over their lifetime.Objective:This study focuses on the exploration of the applic... Background:Acne vulgaris is one of the most common skin diseases that can significantly impact a considerable proportion of individuals over their lifetime.Objective:This study focuses on the exploration of the application potential of bamboo vinegar in cosmetics.Materials and Methods:The stock solution of bamboo vinegar is subjected to reduced-pressure distillation at different temperatures to obtain refined bamboo vinegar.Then,inhibition of Propionibacterium acnes(P.acnes)by refined bamboo vinegar is observed.Moreover,the refined bamboo vinegar is adsorbed and released with activated bamboo charcoal as the carrier.In all,this study aims to probe into the mechanism of the controlledrelease system of bamboo vinegar.Results:The results shows that the harmful substances(tar)in bamboo vinegar distilled at 70℃decreased by 94.44%,which is a more notable decrease compared with that in the stock solution.The total organic acid content in bamboo vinegar after reduced-pressure distillation is 11.840%,reaching the national standard for refined bamboo vinegar(GB/T 31734–2015).Additionally,the minimum inhibitory concentration of refined bamboo vinegar against P.acnes using the punch method is 7.90 mg/mL.This indicates that refined bamboo vinegar has the potential as a prospective raw material for formulations in anti-acne cosmetic products.Furthermore,the release rate of bamboo charcoal/bamboo vinegar in water for 15 min reaches 70.57%,which then slows down to a plateau.The slow-release behavior is agreed with the Ritger-Peppas model and is beneficial to relieve the irritation of bamboo vinegar to the skin and lengthen its bacteriostatic duration.Conclusion:The foregoing conclusions can serve as the theoretical foundation for the application of bamboo vinegar in anti-acne cosmetics. 展开更多
关键词 bamboo vinegar REFINEMENT Propionibacterium acne bamboo charcoal
下载PDF
Fabrication and Characterization of Bamboo—Epoxy Reinforced Composite for Thermal Insulation
5
作者 Nandavardhan Reddy Kopparthi Jens Schuster Yousuf Pasha Shaik 《Open Journal of Composite Materials》 2024年第1期15-32,共18页
As global warming intensifies, researchers worldwide strive to develop effective ways to reduce heat transfer. Among the natural fiber composites studied extensively in recent decades, bamboo has emerged as a prime ca... As global warming intensifies, researchers worldwide strive to develop effective ways to reduce heat transfer. Among the natural fiber composites studied extensively in recent decades, bamboo has emerged as a prime candidate for reinforcement. This woody plant offers inherent strengths, biodegradability, and abundant availability. Due to its high cellulose content, its low thermal conductivity establishes bamboo as a thermally resistant material. Its low thermal conductivity, enhanced by a NaOH solution treatment, makes it an excellent thermally resistant material. Researchers incorporated Hollow Glass Microspheres (HGM) and Kaolin fillers into the epoxy matrix to improve the insulating properties of bamboo composites. These fillers substantially enhance thermal resistance, limiting heat transfer. Various compositions, like (30% HGM + 25% Bamboo + 65% Epoxy) and (30% Kaolin + 25% Bamboo + 45% Epoxy), were compared to identify the most efficient thermal insulator. Using Vacuum Assisted Resin Transfer Molding (VARTM) ensures uniform distribution of fillers and resin, creating a structurally sound thermal barrier. These reinforced composites, evaluated using the TOPSIS method, demonstrated their potential as high-performance materials combating heat transfer, offering a promising solution in the battle against climate change. 展开更多
关键词 thermal Insulator Rooftiles Hollow Glass Microspheres bamboo KAOLIN EPOXY VARTM Process thermal Conductivity Mechanical Properties
下载PDF
The Study on Bamboo Microfibers Isolated by Steam Explosion and Their Comprehensive Properties 被引量:1
6
作者 Qiushi Li Ronggang Luo +9 位作者 Yu Chen Jinhui Xiong Bei Qiao Xijuan Chai Linkun Xie Juan Wang Lianpeng Zhang Siqun Wang Guanben Du Kaimeng Xu 《Journal of Renewable Materials》 SCIE EI 2023年第6期2809-2822,共14页
To overcome the shortage of wood resources as well as to develop novel natural fibers materials,the Chimonobambusa quadrangularis(CQ)and Qiongzhuea tumidinoda(QT)planted in Southwest China were effectively isolated by... To overcome the shortage of wood resources as well as to develop novel natural fibers materials,the Chimonobambusa quadrangularis(CQ)and Qiongzhuea tumidinoda(QT)planted in Southwest China were effectively isolated by the steam explosion(SE).The fine and uniform bamboo microfibers derived from CQ and QT were obtained,and their smallest average widths were 12.62μm and 16.05μm,respectively.The effects of steam explosion on the micro-morphology,chemical composition,thermal stability,crystallinity,surface wettability,and mechanical properties of bamboo microfibers were comprehensively investigated.The results showed that the relative content of cellulose in bamboo microfibers increased but the hemicellulose and lignin contents decreased after SE.The degrees of crystallinity for CQ and QT increased from 40.49%and 39.46%to 68.90%and 55.78%,respectively.The thermal stability and surface hydrophilicity were also improved.The CQ microfibers had a maximum decomposition temperature of 2.79°C,a tensile strength of 58.54 MPa,an elongation at break of 0.6%,and a water contact angle of 2.7°higher than those of the QT microfibers. 展开更多
关键词 Microfiber properties bamboo steam explosion Chimonobambusa quadrangularis Qiongzhuea tumidinoda
下载PDF
Effects of Hydrothermal Environment on the Deformation of the Thin Bamboo Bundle Veneer Laminated Composites
7
作者 Ge Wang Linbi Chen +2 位作者 Haiying Zhou Shanyu Han Fuming Chen 《Journal of Renewable Materials》 SCIE EI 2023年第3期1499-1511,共13页
To overcome warping in thin bamboo bundle veneer laminated composites(TBLC),their hydrothermal deformation characteristics were systematically investigated in this study.It was found that TBLCs accelerated the release... To overcome warping in thin bamboo bundle veneer laminated composites(TBLC),their hydrothermal deformation characteristics were systematically investigated in this study.It was found that TBLCs accelerated the release of internal stress in the thickness direction in a hydrothermal environment,which increased their warpage.TBLCs showed increased warpage in the width and diagonal directions upon increasing the temperature.The warpage of Type E increased by 155.88%and 66.67%in the width and diagonal directions,respectively,when the temperature increased from 25C to 100C.The symmetrical TBLC with cross-lay-up and odd layers displayed better hydrothermal stability.We revealed that the deformation of the TBLCs could be regulated under the synergistic effect of water and temperature.These results provide a scientific basis for improving the uniformity of bamboo bundle composite materials and for developing thin bamboo bundle fiber composite materials with designable structures and controllable performance. 展开更多
关键词 Thin bamboo bundle veneer laminated composites DEFORMATIon hydrothermal environment lay-up structure
下载PDF
Research on the Bending Impact Resistance and Transverse Fracture Characteristics of Bamboo under the Action of Falling Weight
8
作者 Hao Jia Benhua Fei +4 位作者 Changhua Fang Huanrong Liu Xiubiao Zhang Xinxin Ma Fengbo Sun 《Journal of Renewable Materials》 SCIE EI 2023年第1期473-490,共18页
Drop weight impact tester was used to accurately measure the bending impact resistance of various parts of Phyllostachys edulis,commonly known as moso bamboo,with a growth cycle of 3–8 years.Cellulose crystallinity i... Drop weight impact tester was used to accurately measure the bending impact resistance of various parts of Phyllostachys edulis,commonly known as moso bamboo,with a growth cycle of 3–8 years.Cellulose crystallinity in the bottom(B),middle(M)and top(T)of bamboo at different ages was calculated using peak height analysis in X-ray diffraction.Heatmap of Spearman correlation analysis was used to represent the correlation between chemical composition and impact mechanics.The breaking load(BL),fracture energy(FE)and impact deflection(ID)of 3–8-year-old bamboo were found to be in the range of~670–2120 N,~5.17–15.55 J,and~3.60–~17.76 mm,respectively.As the growth period of bamboo rises,the cellulose crystallinity at the B and T decreases first and then increases,while that for the M increases first and then remains stable.Similarly,the bending impact performance of bamboo was found to become stable with its growth and age.The flexural impact and toughness of the 4-year-old bamboo base material were better than other specimens.The enhancement in the bending impact properties of bamboo at different growth periods was influenced by the lignin content,while the value of FE was mainly positively correlated with ash,cold and hot water extracts and benzyl alcohol content.However the content of holocellulose and pentosan,air-dry density and,base density negatively influenced the FE.With the change in the height of the bamboo,the correlation between its impact mechanical properties and chemical composition gradually decreased.This study provides data support and theoretical basis for the age-appropriate thinning and application of moso bamboo. 展开更多
关键词 Moso bamboo LIFESPAN bending impact breaking load fracture energy impact deflection chemical composition correlation
下载PDF
On the Translation Strategies of Characters’Nicknames-Taking The Iconography of the Decorated Writing-Paper of the Ten Bamboo Studio as an Example
9
作者 BAO De-wang GAO Yi-meng 《Journal of Literature and Art Studies》 2023年第11期813-818,共6页
Up to now,The Iconography of the Decorated Writing-Paper of the Ten Bamboo Studio(shortened as Iconography)is the first large-scale book to systematically study and interpret the notes and pictures of The Decorated Wr... Up to now,The Iconography of the Decorated Writing-Paper of the Ten Bamboo Studio(shortened as Iconography)is the first large-scale book to systematically study and interpret the notes and pictures of The Decorated Writing-Paper of the Ten Bamboo Studio(shortened as Ten Bamboo).The Iconography explains the sources and interpretations of 123 paintings in 15 groups.The content covers the celebrities and historical allusions of Tessa in the past dynasties,in which there are many nicknames that are full of Chinese characteristics.This paper takes the English translation of characters’nicknames in Iconography as the research object.Through the research,it is found that the translation of these characters’nicknames mainly adopts the methods of transliteration,explanation,literal translation with annotations and free translation.Through the analysis of specific cases,this paper tries to make the translation meet the reading expectation of the target readers to the maximum extent,and provide reference for the English translation of related classical works. 展开更多
关键词 the Iconography of the Decorated Writing-Paper of the Ten bamboo Studio translation method NICKNAME
下载PDF
度普利尤单抗治疗Netherton综合征一例并文献复习
10
作者 臧莹 任伟琦 +1 位作者 王梓赫 王君 《中国麻风皮肤病杂志》 2024年第1期9-14,共6页
患者,男,5岁。全身皮肤干燥、脱屑,痒4年。患者出生20天后自前额、手、小腿开始出现干燥、脱屑,逐渐蔓延至股部、腹部。2岁后全身皮肤开始弥漫潮红、脱屑加重并伴剧烈瘙痒。躯干、四肢覆大量鳞屑,局部浸润、肥厚,关节伸侧皮肤显著苔藓... 患者,男,5岁。全身皮肤干燥、脱屑,痒4年。患者出生20天后自前额、手、小腿开始出现干燥、脱屑,逐渐蔓延至股部、腹部。2岁后全身皮肤开始弥漫潮红、脱屑加重并伴剧烈瘙痒。躯干、四肢覆大量鳞屑,局部浸润、肥厚,关节伸侧皮肤显著苔藓化。皮肤镜下眉毛呈竹节状改变。血常规示嗜酸性粒细胞1.05×109/L。免疫球蛋白E>1130.00 IU/mL。诊断:Netherton综合征。目前有15篇文献报道应用度普利尤单抗治疗NS的临床效果,本例患者应用度普利尤单抗治疗4个月,患者瘙痒情况明显改善,全身脱屑短暂缓解,本文对既往文献及本例患者治疗进行了回顾性分析。 展开更多
关键词 Netherton综合征 竹节状发 度普利尤单抗
下载PDF
A Review of Basic Mechanical Properties of Bamboo Scrimber Based on Small-Scale Specimens
11
作者 Xin Xue Haitao Li Rodolfo Lorenzo 《Journal of Renewable Materials》 EI CAS 2024年第4期869-894,共26页
This review summarizes the existing knowledge about the mechanical properties of bamboo scrimber(BS)in literature.According to literature reviews,the strength of BS under different load modes is affected by a series o... This review summarizes the existing knowledge about the mechanical properties of bamboo scrimber(BS)in literature.According to literature reviews,the strength of BS under different load modes is affected by a series of factors,such as the type of original bamboo,growth position,resin content,treatment method and density.Therefore,different production processes can be adopted according to different requirements,and bamboo scrimbers can also be classified accordingly.In addition,this review summarizes the changes in different factors considered by scholars in the research on the mechanical properties of BS,so that readers can have an overall understanding of the existing research and make more innovative and valuable research on this basis.This review provides and discusses the conclusive observations,the current research gaps and future research directions on the mechanical properties of BS. 展开更多
关键词 bamboo scrimber manufacturing process mechanical properties failure modes constitutive model
下载PDF
Free vibration and buckling analysis of polymeric composite beams reinforced by functionally graded bamboo fbers
12
作者 H.M.FEIZABAD M.H.YAS 《Applied Mathematics and Mechanics(English Edition)》 SCIE EI CSCD 2024年第3期543-562,共20页
Natural fibers have been extensively researched as reinforcement materials in polymers on account of their environmental and economic advantages in comparison with synthetic fibers in the recent years.Bamboo fibers ar... Natural fibers have been extensively researched as reinforcement materials in polymers on account of their environmental and economic advantages in comparison with synthetic fibers in the recent years.Bamboo fibers are renowned for their good mechanical properties,abundance,and short cycle growth.As beams are one of the fundamental structural components and are susceptible to mechanical loads in engineering applications,this paper performs a study on the free vibration and buckling responses of bamboo fiber reinforced composite(BFRC)beams on the elastic foundation.Three different functionally graded(FG)layouts and a uniform one are the considered distributions for unidirectional long bamboo fibers across the thickness.The elastic properties of the composite are determined with the law of mixture.Employing Hamilton’s principle,the governing equations of motion are obtained.The generalized differential quadrature method(GDQM)is then applied to the equations to obtain the results.The achieved outcomes exhibit that the natural frequency and buckling load values vary as the fiber volume fractions and distributions,elastic foundation stiffness values,and boundary conditions(BCs)and slenderness ratio of the beam change.Furthermore,a comparative study is conducted between the derived analysis outcomes for BFRC and homogenous polymer beams to examine the effectiveness of bamboo fibers as reinforcement materials,demonstrating the significant enhancements in both vibration and buckling responses,with the exception of natural frequencies for cantilever beams on the Pasternak foundation with the FG-◇fiber distribution.Eventually,the obtained analysis results of BFRC beams are also compared with those for carbon nanotube reinforced composite(CNTRC)beams found in the literature,indicating that the buckling loads and natural frequencies of BFRC beams are lower than those of CNTRC beams. 展开更多
关键词 bamboo fiber free vibration buckling analysis functionally graded(FG)beam elastic foundation generalized differential quadrature method(GDQM)
下载PDF
Development of Kaolin and Glass Fiber Reinforced Composites for Thermal Insulating Panels
13
作者 Jagadiswar Reddy Tippi Reddy Jens Schuster Yousuf Pasha Shaik 《Open Journal of Composite Materials》 2024年第1期44-59,共16页
In our modern world, where conserving energy is highly valued, thermal insulation panels play a crucial role in reducing heat transfer between two spaces, surfaces, or materials. They are used to enhance the energy ef... In our modern world, where conserving energy is highly valued, thermal insulation panels play a crucial role in reducing heat transfer between two spaces, surfaces, or materials. They are used to enhance the energy efficiency of various industrial applications by minimizing heat loss and temperature control. These panels function as silent protectors, aiding in reducing energy consumption and making things more sustainable and better for the environment. This is where composite materials come in;they are known for their lightweight nature, high strength-to-weight ratio, and excellent thermal insulation properties and have gained significant attention. Researchers are actively engaged in various studies aimed at enhancing these materials further. This research project focuses on the development of kaolin and glass fiber-reinforced composites for thermally insulating panels, to which natural strengthening materials like corn husk and bamboo fibers are added. The aim is to create cost-effective and efficient composite materials for thermal insulation applications by incorporating these components with a binder consisting of potassium silicate, hydroxide, and distilled water. This project involves conducting compression tests, bending tests, impact tests, thermal conductivity measurements, and microscopic analysis to evaluate the mechanical and thermal properties of the developed composites. The profound impact of these engineered composites on thermal insulation panels stands to revolutionize energy conservation efforts, offering a potent avenue to minimize heat loss and enhance overall energy efficiency across an array of industrial sectors. 展开更多
关键词 KAOLIN Glass Fiber Corn Husk bamboo Potassium Silicate Potassium Hydroxide
下载PDF
The Tallest Grass-Bamboo
14
作者 吴世龙 陈传光(指导) 《中学生英语》 2024年第26期7-7,共1页
Although bamboo is really a kind of grass,it looks more like tree-a beautiful tree.Chinese poets write poems and songs about bamboo,the artists paint it in pictures.
关键词 bamboo GRASS BEAUTIFUL
下载PDF
Acetylation of Chinese bamboo flour and thermoplasticity 被引量:6
15
作者 李雪芳 陈钦慧 +2 位作者 林金火 卓东贤 吴秀玲 《Journal of Forestry Research》 SCIE CAS CSCD 2008年第1期69-71,共3页
Chinese bamboo flour was chemically modified by acetylation with acetic anhydride by using trichloroacetic acid as an activation agent and the optimized condition for acetylation of bamboo flour was determined as the ... Chinese bamboo flour was chemically modified by acetylation with acetic anhydride by using trichloroacetic acid as an activation agent and the optimized condition for acetylation of bamboo flour was determined as the trichloroacetic acid amount 6.0 g per 1.5-g bamboo flour, ultrasosonication duration 40 min and the reaction time 1 h at 65℃. The composition, microstructure and thermal behavior of acetylated bamboo flour were preliminarily characterized by FT-IR, DSC and SEM etc. The acetylated bamboo flour can be molded into sheets at 130℃ and 10 MPa, indicating the modified bamboo flour possesses thermalplastic performance. 展开更多
关键词 ACETYLATIon theRMOPLASTICITY bamboo flour modification trichloroacetic acid
下载PDF
The Directional Breeding and Feasibility of Functional Bamboos 被引量:1
16
作者 史军义 周德群 +2 位作者 马丽莎 姚俊 蒲正宇 《Agricultural Science & Technology》 CAS 2016年第3期711-716,共6页
The functional bamboos are defined as the ones artificially selected, cultivated and produced in the special functions. Based on the principles to broaden market and maximize benefits, the directional cultivation of t... The functional bamboos are defined as the ones artificially selected, cultivated and produced in the special functions. Based on the principles to broaden market and maximize benefits, the directional cultivation of the functional bamboos has effectively been used bio-techniques and directionally to breed and cultivate bamboo cultivars to meet human's needs. The functional bamboos should feature stability, excellent quality and convenient production as well as easy duplication. The functional bamboo cultivars should also enhance the scientization, standardization industrialization and mass production. Given no negative environmental impact, ou purpose is to select, cultivate and develop one or more functional bamboos cultivars to meet the consumers' material and spiritual needs and bring more economic ben efits for the producers. The authors believe that directionally breeding functiona bamboo cultivars is not only feasible in techniques, resources and policies, but also in economy and market development. This implicates great significance for the green economic development given the features of China's natural resources. 展开更多
关键词 Functional bamboos bamboo cultivars Directinal Cultivation Feasibility
下载PDF
Measuring Carbon Dioxide Sink of Betung Bamboo (Dendrocallamus asper (Schult f.) Backer ex Heyne) by Sinusoidal Curves Fitting on Its Daily Photosynthesis Light Response 被引量:1
17
作者 Effendi Tri Bahtiar Naresworo Nugroho Anne Carolina Aditya Chandra Maulana 《Journal of Agricultural Science and Technology(B)》 2012年第7期780-788,共9页
Planting plant such as Betung bamboo (Dendrocalamus asper (Schult f.) Backer ex Heyne) is one of the best ways for reducing global warming effect. Betung bamboo is giant grass (Poaceae) which has been traditiona... Planting plant such as Betung bamboo (Dendrocalamus asper (Schult f.) Backer ex Heyne) is one of the best ways for reducing global warming effect. Betung bamboo is giant grass (Poaceae) which has been traditionally used by Indonesian people for construction material since a long time ago. Poaceae family commonly has better carbon sink ability than trees because of its Ca photosynthesis mechanisms, but bamboo sub-family (Bambusoideae) lacks the Ca photosynthetic pathway and anatomy. In the absence of this feature the maximum possible productivity of bamboos is unlikely to greatly exceed that of other bioenergy crops with C3 photosynthesis such as fast growing tree species. This research proposed a sinusoidal equation as a basic equation for plant's daily photosynthesis light response curve fitting. The sinusoidal equation was success for Betung bamboo's daily photosynthesis light response curve fitting (R2 〉 60%). It had similar result in estimating carbon sink (82.35 kg/clump/year) compared to those which calculated by annual increment (69.01-107.82 kg/clump/year). It is better to choose sinusoidal equation than quadratic or cubic Betung bamboo is a good choice to be planted in order to resist the global warming effect because it has superior carbon sink capability (82.35 kg/clump/year) than slow growing tree, and equal to fast growing tree species, besides many other advantages. 展开更多
关键词 Carbon sink Betung bamboo daily photosynthesis light response sinusoidal curve fitting.
下载PDF
Single-cell transcriptome atlas reveals spatiotemporal developmental trajectories in the basal roots of moso bamboo (Phyllostachys edulis) 被引量:1
18
作者 Zhanchao Cheng Changhong Mu +14 位作者 Xiangyu Li Wenlong Cheng Miaomiao Cai Chongyang Wu Jutang Jiang Hui Fang Yucong Bai Huifang Zheng Ruiman Geng Junlei Xu Yali Xie Yuping Dou Juan Li Shaohua Mu Jian Gao 《Horticulture Research》 SCIE CSCD 2023年第8期59-71,共13页
Roots are essential for plant growth and development.Bamboo is a large Poaceae perennial with 1642 species worldwide.However,little is known about the transcriptional atlas that underpins root cell-type differentiatio... Roots are essential for plant growth and development.Bamboo is a large Poaceae perennial with 1642 species worldwide.However,little is known about the transcriptional atlas that underpins root cell-type differentiation.Here,we set up a modified protocol for protoplast preparation and report single-cell transcriptomes of 14279 filtered single cells derived from the basal root tips of moso bamboo.We identified four cell types and defined new cell-type-specific marker genes for the basal root.We reconstructed the developmental trajectories of the root cap,epidermis,and ground tissues and elucidated critical factors regulating cell fate determination.According to in situ hybridization and pseudotime trajectory analysis,the root cap and epidermis originated from a common initial cell lineage,revealing the particularity of bamboo basal root development.We further identified key regulatory factors for the differentiation of these cells and indicated divergent root developmental pathways between moso bamboo and rice.Additionally,PheWOX13a and PheWOX13b ectopically expressed in Arabidopsis inhibited primary root and lateral root growth and regulated the growth and development of the root cap,which was different from WOX13 orthologs in Arabidopsis.Taken together,our results offer an important resource for investigating the mechanism of root cell differentiation and root system architecture in perennial woody species of Bambusoideae. 展开更多
关键词 inhibited ROOTS bamboo
下载PDF
Identifying priority protection areas of key food resources of the giant panda
19
作者 Ying-Jie Ma Meng Wang +4 位作者 Xiao-Yu Hu Xiao-Dong Gu Yu-Mei Li Fu-Wen Wei Yong-Gang Nie 《Zoological Research》 SCIE CSCD 2023年第5期860-866,共7页
Animals that live in seasonal environments adjust their reproduction cycle to optimize seasonal forage quality.Giant pandas(Ailuropoda melanoleuca)are seasonal altitudinal migrants that feed on bamboo shoots and leave... Animals that live in seasonal environments adjust their reproduction cycle to optimize seasonal forage quality.Giant pandas(Ailuropoda melanoleuca)are seasonal altitudinal migrants that feed on bamboo shoots and leaves with different nutritional quality.However,the importance of bamboo shoots to giant pandas,especially small and isolated populations,is not fully appreciated.Here,we explored whether mating time of giant pandas is shaped by bamboo shoot phenology.We also assessed the intensity of ongoing bamboo shoot harvesting by local communities in 42 giant panda reserves based on questionnaire surveys.Varying intensity and protection levels of bamboo shoot harvesting were found.From these data,we developed a priority ranking scheme of protection areas for this key food resource.Our study showed that pandas time their mating behavior to coincide with bamboo shoot phenology due to the high nutritional demands associated with mating and pregnancy.We also found that bamboo shoots were not well protected in many places.Liangshan,Daxiangling,and Xiaoxiangling,containing the most isolated panda populations,were identified as the areas with the most urgent need of protection.Furthermore,equal attention should be paid to the Qiong L-B population,as this region holds considerable potential to serve as a corridor between the Minshan and Qionglai populations.To address the challenges posed by bamboo shoot harvesting,we recommend establishing more practical bamboo shoot management policies,increasing public awareness of bamboo shoot protection,and providing alternative sources of income for local communities. 展开更多
关键词 Giant panda Forage quality bamboo shoot harvesting Reproduction timing Conservation management
下载PDF
Dramatical hydro-sedimentary changes induced by bamboo fences over mangrove tidal flat of the largest delta in Beibu Gulf, southwestern China
20
作者 Zuming Huang Zhijun Dai +5 位作者 Riming Wang Xiaoyan Zhou Wenhong Pang Jiejun Luo Bingbin Feng Baoqing Hu 《Acta Oceanologica Sinica》 SCIE CAS CSCD 2023年第7期103-115,共13页
Mangrove forest is one of the most important ecological and environmental resources by effectively promoting tidal flat deposition and preventing the coastal region from typhoon.However,there have been mass loss of ma... Mangrove forest is one of the most important ecological and environmental resources by effectively promoting tidal flat deposition and preventing the coastal region from typhoon.However,there have been mass loss of mangrove forests due to anthropogenic activities.It is an urgent need to explore an effective way for mangrove restoration.Here,three rows of bamboo fences with hydro-sedimentary observation set over Aegiceras corniculatum mangrove tidal flat of the Nanliu Delta,the largest delta of Beibu Gulf,China,were conducted to analyze the hydro-sedimentary variations induced by bamboo fences.Results identified that the mean horizontal velocity Um per burst(20 min)decreased by as much as 71%and 40%in comparison with those without bamboo fences in March and November,respectively,when the tidal current entering the bamboo area during flood.The maximum of mean horizontal flow velocity Um-max at bamboo area was 50%–75%of that without bamboo fences during ebb tide.The suspended sediment concentration of bamboo area suggested a maximum reduction of 57%relative to bare flat during flood,and was 80%lower than bare flat at ebb peak.Moreover,the turbulent kinetic dissipationεat flood tide was significantly higher than that at ebb tide,while the bamboo fences greatly increased the turbulent kinetic dissipationεby 2 to 5 times relative to bare flat,resulting in an increase of the bed elevation by inhibiting the sediment incipient motion and intercepting suspended sediment.The siltation rate at the bamboo area was 140%and 29.3%higher than that at the bare flat and the region covered with A.corniculatum,respectively.These results highlight that bamboo fences can effectively attenuate tidal current and thus promote siltation over mangrove flat,which contribute great benefit to mangrove survival. 展开更多
关键词 mangrove tidal flat bamboo fences hydro-sedimentary process bed siltation
下载PDF
上一页 1 2 250 下一页 到第
使用帮助 返回顶部