نتایج جستجو برای: gravel mixture

تعداد نتایج: 97190  

2013
Richard Chahwan Serge Gravel Takahiro Matsusaka Stephen P. Jackson

RNF8 links nucleosomal and cytoskeletal ubiquitylation of higher order protein structures Comment on: Chahwan R, et al. Cell Cycle 2013; 12:1000–8; PMID:23442799; http://dx.doi.org/10.4161/cc.23947 Richard Chahwan,* Serge Gravel, Takahiro Matsusaka and Stephen P. Jackson*; The Gurdon Institute; University of Cambridge; Cambridge, UK; Department of Zoology; University of Cambridge; Cambridge, UK...

Journal: :Waste management 2016
A Keulen A van Zomeren P Harpe W Aarnink H A E Simons H J H Brouwers

Municipal solid waste incineration bottom ash was treated with specially designed dry and wet treatment processes, obtaining high quality bottom ash granulate fractions (BGF) suitable for up to 100% replacement of natural gravel in concrete. The wet treatment (using only water for separating and washing) significantly lowers the leaching of e.g. chloride and sulfate, heavy metals (antimony, mol...

2015
A. A. Zidan A. A. Rashed A. Y. Hatata M. A. Abd El-Hady

Artificial neural networks, ANNs were developed to model the biological oxygen demand (BOD), biochemical oxygen demand (COD), and total suspended solids (TSS) treatment in 3 horizontal subsurface flow (HSSF) constructed wetlands (CWs) located in Samaha village, Nile Delta, Egypt. Gravel, hollow plastic bits and shredded tires pieces were used as different wetland treatment media. Three hundred ...

Journal: :American journal of audiology 2005
Judith S Gravel Karl R White Jean L Johnson Judith E Widen Betty R Vohr Michele James Teresa Kennalley Antonia B Maxon Lynn Spivak Maureen Sullivan-Mahoney Yusnita Weirather Sally Meyer

PURPOSE This article examines whether changes in hearing screening practices are warranted based on the results of the recent series of studies by J. L. Johnson, K. R. White, J. E. Widen, J. S. Gravel, B. R. Vohr, M. James, T. Kennalley, A. B. Maxon, L. Spivak, M. Sullivan-Mahoney, Y. Weirather, and S. Meyer (Johnson, White, Widen, Gravel, James, et al., 2005; Johnson, White, Widen, Gravel, Voh...

Journal: :Journal of Japan Society of Civil Engineers, Ser. B2 (Coastal Engineering) 2009

پایان نامه :وزارت علوم، تحقیقات و فناوری - دانشگاه سیستان و بلوچستان - دانشکده مهندسی عمران 1392

abstract in aggregate, active forms of reactive silica with mineral names are sometimes associated with sand and gravel in concrete mixture. alkali hydroxides originated from alkalis in the cement or other resources form an alkaline silica gel with this reactive silica which becomes swallowed and expanded during time causing damage to concrete. there have been growing researches on alkaline r...

2008
Arvind Singh Stefano Lanzoni Efi Foufoula-Georgiou

The dynamics of river bed evolution are known to be notoriously complex affected by near-bed turbulence, the collective motion of clusters of particles of different sizes, and the formation of bedforms and other large-scale features. In this paper, we present the results of a study aiming to quantify the inherent nonlinearity and complexity in gravel bed dynamics. The data analyzed are bed elev...

2017
E. N. Bray T. Dunne

Geomorphic and hydraulic processes, which form gravel bars in large lowland rivers, have distinctive characteristics that control the magnitude and spatial patterns of infiltration and exfiltration between rivers and their immediate subsurface environments. We present a bedform-infiltration relation together with a set of field measurements along two reaches of the San Joaquin River, CA to illu...

Journal: :Ground water 2010
James T Ferreira Robert W Ritzi David F Dominic

Open-framework gravel has permeability, k, above the measurement range of most laboratory constant-head permeameters because the head difference across the length of conventional permeameters is too small to be measured. Here we addressed the challenge of measuring the high k by using a 3 m long permeameter. The head difference over this length was of the order of 10(-2) to 10(-3) m, which we c...

2017
Sara Mechtensimer Gurpal S Toor

Septic systems can be a potential source of phosphorus (P) in groundwater and contribute to eutrophication in aquatic systems. Our objective was to investigate P transport from two conventional septic systems (drip dispersal and gravel trench) to shallow groundwater. Two new in-situ drainfields (6.1 m long by 0.61 m wide) with a 3.72 m2 infiltrative surface were constructed. The drip dispersal ...

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