Results 11 to 20 of about 918,514 (285)

Effect of different wire materials on WEDM performance of Bio-compatible material

Production Engineering Archives, 2022
The present experimental investigation aims to analyse the effect of various machining parameters, such as pulse peak current (Ion), pulse on time (Ton), pulse off time (Toff) and spark voltage (SV) on the surface roughness (SR) and material removal rate(
Pandey Gaurav Kumar, Patel Praveen Bhai, Kumar Abhishek, Niranjan Ramendra Singh, Katiyar Vikas, Chandra A K   +5 more
doaj   +1 more source

Changes in Storage and the Stratification Ratio of Soil Organic Carbon under Different Vegetation Types in Northeastern China

Agronomy, 2020
The depth distribution of soil organic carbon (SOC) in a soil profile is important to examine the effects of different treatments on SOC sequestration. This study was conducted to determine the effects of different vegetation types on the concentration ...
Pujia Yu, Shiwei Liu, Zhi Ding, Aichun Zhang, Xuguang Tang   +4 more
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Separation of Sr, Nd, and U from Geological Samples Using Tandem Resin Column

Yankuang ceshi, 2023
BACKGROUND Uranium-series nuclides are one of the three major radioactive decay systems, which are suitable for studying various geological processes at different time scales. In addition, 87Sr/86Sr and 143Nd/144Nd isotopes (Sr-Nd isotopes for short) are
LUO Zhenghua, LI Chao, LAI Zheng, WANG Chenyu, GUO Yulong, DUAN Zhifei, XU Juan, YANG Shouye   +7 more
doaj   +1 more source

Methodical approaches to identification of effective wheat genes providing broad-spectrum resistance against fungal diseases

Вавиловский журнал генетики и селекции, 2017
Among the pathogenic complex of the common wheat there is a causal agent of leaf and stem diseases: (rusts and powdery mildew), which has economic importan ce for most of the Russian regions. We propose a methodological approach for confirmation of effec
E. S. Skolotneva, I. N. Leonova, E. Yu. Bukatich, E. A.  Salina   +3 more
doaj   +1 more source

Development of Surface Roughness and Mechanical Properties of PMMA Nanocomposites by Blending with Polymeric Materials [PDF]

Engineering and Technology Journal, 2019
This work aims to a development of mechanical properties of PMMA that is utilized in denture material, by using two types of polymers; blends (PMMA:2%NR) and (PMMA:2%SR) as a matrix materials strengthen with natural nanoparticles from the pomegranate ...
Hussein Sadeq, Sihama Salih, Auda Braihi
doaj   +1 more source

The Introduction of Spending Review into the Budget Process in Germany [PDF]

Научно-аналитический вестник Института Европы РАН, 2019
The article describes Germany’s experience of the new budget technology, i.e. the spending review (SR) procedure. By 2019, it became a permanent and mandatory part of the budget preparation.
Maria Gracheva
doaj   +1 more source

⁸⁷Sr/⁸⁶Sr chemostratigraphy of Neoproterozoic Dalradian limestones of Scotland and Ireland: constraints on depositional ages and time scales [PDF]

, 2004
New calcite ⁸⁷Sr/⁸⁶Sr data for 47 limestones from the metamorphosed and deformed Neoproterozoic-Cambrian Dalradian Supergroup of Scotland and Ireland are used to identify secular trends in seawater <sup>
Fallick, A.E., Robert M. Ellam, Anthony E. Fallick, Graham, C.M., Ellam, R.M., Christopher W. Thomas, Thomas, C.W., Colin M. Graham   +7 more
core   +1 more source

Study on the modified NaAlCl4/ZSM-5 catalysts —catalytic performance of the disproportionation of chlorotrimethyl and trichloromethyl silanes(NaAlCl4/ ZSM-5分子筛催化剂的改性研究)

Zhejiang Daxue xuebao. Lixue ban, 2010
前期工作表明NaAlCl4/ZSM-5分子筛有较好的催化一甲基硅烷和三甲基硅烷制备二甲基硅烷活性.本文通过浸渍法制备了一系列的用La(NO3)3改性及Sr(NO3)2改性的NaAlCl4/ZSM-5分子筛催化剂.结果表明La(NO3)3的加入对反应活性有一定程度的提高,当加入La(NO3)3的量为5%时,二甲产率最高,为68.24%.当加入Sr(NO3)2的量为3%时的效果最好,二甲含量为77.63%.采用IR表征的结果与实验结果比较吻合.用量子化学计算对所得结果进行了理论解释.
XUWen-yuan(徐文媛), HAOWei(郝伟), ZHONGYun(钟昀), HEZhong-yi(何忠义), LIUJian-ping(刘建平), ZHENGLong-zhen(郑龙珍), HULin(胡林)   +6 more
doaj   +1 more source

Determinación de Sr y Ba en celestinas por fluorescencia de rayos X empleando patrones sintéticos

Estudios Geologicos, 1988
Se ha estudiado un método rápido para análisis cuantitativo de estroncio y bario en celestinas por fluorescencia de rayos X. Las características químicas de las celestinas de la zona estudiada de las cordilleras Béticas se han simulado con patrones ...
V. López Fenoy, R. Arana Castillo, C. Pérez Sirvent, R. J. Ortiz González   +3 more
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THE MEAN LIGHT CURVES OF THE MIRA-TYPE STARS IN THE H- AND K-BANDS

Odessa Astronomical Publications, 2016
. For nine Mira-type stars (o Cet, R Leo, S Car, U Her, X Oph, R Aql, RR Aql, S Ori, S Scl,) and one semi-regular star (L2 Pup), the mean light curves have been obtained.
L. S. Kudashkina
doaj   +1 more source