نتایج جستجو برای: rubber

تعداد نتایج: 17462  

2015
Jeremy R. Shearman Duangjai Sangsrakru Nukoon Jomchai Panthita Ruang-areerate Chutima Sonthirod Chaiwat Naktang Kanikar Theerawattanasuk Somvong Tragoonrung Sithichoke Tangphatsornruang

Hevea brasiliensis, or rubber tree, is an important crop species that accounts for the majority of natural latex production. The rubber tree nuclear genome consists of 18 chromosomes and is roughly 2.15 Gb. The current rubber tree reference genome assembly consists of 1,150,326 scaffolds ranging from 200 to 531,465 bp and totalling 1.1 Gb. Only 143 scaffolds, totalling 7.6 Mb, have been placed ...

2016
Wen-Jun Zhou Hong-li Ji Jing Zhu Yi-Ping Zhang Li-Qing Sha Yun-Tong Liu Xiang Zhang Wei Zhao Yu-xin Dong Xiao-Long Bai You-Xin Lin Jun-Hui Zhang Xun-Hua Zheng

To gain the effects of N fertilizer applications on N2O emissions and local climate change in fertilized rubber (Hevea brasiliensis) plantations in the tropics, we measured N2O fluxes from fertilized (75 kg N ha(-1) yr(-1)) and unfertilized rubber plantations at Xishuangbanna in southwest China over a 2-year period. The N2O emissions from the fertilized and unfertilized plots were 4.0 and 2.5 k...

2014
Nuha Salim Mashaan Asim Hassan Ali Mohamed Rehan Karim Mahrez Abdelaziz

An immense problem affecting environmental pollution is the increase of waste tyre vehicles. In an attempt to decrease the magnitude of this issue, crumb rubber modifier (CRM) obtained from waste tyre rubber has gained interest in asphalt reinforcement. The use of crumb rubber in the reinforcement of asphalt is considered as a smart solution for sustainable development by reusing waste material...

Journal: :Marine environmental research 2006
Zhijian Tang Michael A Butkus Yuefeng F Xie

The removal of turbidity, particles, phytoplankton and zooplankton in water by crumb rubber filtration was investigated. A substantial reduction was achieved. Of the three variables, filter depth, media size and filtration rate, media size had the most significant influence. Smaller media size favored higher removal efficiency of all targeted matter. There was no apparent relationship between r...

2004
D. LI

The fracture toughness and uniaxial tensile yield strengths of unmodified and CTBN-rubbermodified epoxies were measured under hydrostatic pressure. The purpose of these experiments was to learn how suppressing cavitation in rubber particles affects the deformation mechanisms and the fracture toughness of rubber-modified epoxy. It was found that the cavitation of CTBN-rubber could be suppressed ...

2007
J. Edirisinghe D. Perera

Rubber is one of the major plantation crops cultivated in Sri Lanka. It gives an environmental service apart from its economic potential. To have a continuous supply of rubber, it is vital that the balance between mature and immature rubber stands be maintained in the long run. In order to do this, at least 3% of the total area under rubber needs to be re-planted annually. However, in the recen...

2016
Huiru Zou Yanni Li Xiaoli Lian Yan Yan Xiaohua Dai Guanhua Wang

Objective. To investigate the frequency and influencing factors of rubber dam usage for endodontic procedures among general dentistry practitioners and specialized practitioners (endodontist) in Tianjin. Methods. Three hundred questionnaires were distributed among practitioners from 3 different types of medical institutions in Tianjin. Data were collected and analysed using Chi-square tests. Re...

1998
W. J. CHANG J. PAN

Spherical void expansion in plastics and rubber-modified plastics is investigated under radial traction conditions. The plastics are modeled as elastic-plastic pressure-sensitive materials and the rubbers are modeled as nonlinearly elastic materials. First, the growth of a spherical void in an infinite plastic matrix is investigated under remote radial traction conditions. The results show that...

2018
Kapila K. Liyanage Sehroon Khan Siraprapa Brooks Peter E. Mortimer Samantha C. Karunarathna Jianchu Xu Kevin D. Hyde

Powdery mildew disease of rubber affects immature green leaves, buds, inflorescences, and other immature tissues of rubber trees, resulting in up to 45% losses in rubber latex yield worldwide. The disease is often controlled by dusting the diseased plants with powdered sulfur, which can have long-term negative effects on the environment. Therefore, it is necessary to search for alternative and ...

2014
Suzana Samaržija-Jovanović Vojislav Jovanović Gordana Marković Ivana Zeković Milena Marinović-Cincović

Opalized white tuff (OWT) with 40 μm average particle size and 39.3 m(2)/g specific surface area has been introduced into polyisoprene rubber (NR). Their reinforcing effects were evaluated by comparisons with those from precipitated silica (PSi). The cure characteristic, apparent activation energy of cross-link (E(ac)) and reversion (E(ar)), and mechanical properties of a variety of composites ...

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