Results 51 to 60 of about 251,567 (156)

Porous Ruthenium–Tungsten–Zinc Nanocages for Efficient Electrocatalytic Hydrogen Oxidation Reaction in Alkali

Nanomaterials
With the rapid development of anion exchange membrane technology and the availability of high-performance non-noble metal cathode catalysts in alkaline media, the commercialization of anion exchange membrane fuel cells has become feasible.
Xiandi Sun, Zhiyuan Cheng, Hang Liu, Siyu Chen, Ya-Rong Zheng   +4 more
doaj   +1 more source

Recent Advances in Improving the Alkaline Oxygen Reduction Performance of Atomically Dispersed Metal–Nitrogen–Carbon Catalysts

Nanomaterials
Atomically dispersed metal–nitrogen–carbon (M-N-C) catalysts are regarded as ideal catalytic materials for the oxygen reduction reaction (ORR) under alkaline conditions.
Jian Chen, Zheng Li, Xiong Du, Mengran Wang, Simin Li, Qiyu Wang, Yangen Zhou, Yanqing Lai   +7 more
doaj   +1 more source

Is the Value Added Tax Naturally Progressive? [PDF]

A broad based consumption tax, such as a value added tax, is generally considered to be a regressive tax. This conclusion, however, has not taken into account the fact that in developing countries the commodities on which poor households spend most of ...
Hatice Jenkins, Glenn P. Jenkins, Chun-Yan Kuo   +2 more
core  

Optimization of biosurfactant production by Pseudomonas aeruginosa strain Pa using rubber tree seed oil as sole carbon source

Discover Applied Sciences
Biosurfactants (BS) are highly emulsifying, biodegradable, non- or low-toxic, stable and multifunctional molecules. However, high production costs and low yields limit their large-scale production and use.
Yapi Joel Angba, Alpha Ousmane Touré, Koutouan Désiré Martial Abro, Mahamane Nassirou Amadou Kiari, Allali Patrick Drogui, Kouassi Benjamin Yao   +5 more
doaj   +1 more source

The Added Value of Value Added Tax: People are more willing to pay tax

, 2015
Raising domestic tax revenues is a priority for most sub-Saharan African countries. But the tax bases in most African countries are undermined by widespread tax avoidance and evasion.
Iversen, Thor Olav, Fjeldstad, Odd-Helge
core  

ANALISIS NILAI TAMBAH (VALUE ADDED) PENGOLAHAN SIRUP KAYUMANIS DI KABUPATEN KERINCI PROPINSI JAMBI

, 2018
The purpose of this study were: (1) to determine how much value added  and profit of cinnamon syrup procsesing in Siulak Deras Mudik Village Gunung Kerinci District Kerinci Regency Jambi Province, (2) to determine the background factors of agroindustry ...
Iskandar, Sutarmo, Nurvalentini, Nurvalentini, Mulyana, Andi, Yamin, M., Marwa, Taufik   +4 more
core   +1 more source

Student Sorting and Bias in Value Added Estimation: Selection on Observables and Unobservables [PDF]

Non-random assignment of students to teachers can bias value added estimates of teachers’ causal effects. Rothstein (2008) shows that typical value added models indicate large counter-factual effects of 5th grade teachers on students’ 4th grade learning,
Jesse Rothstein
core  

The added value of FM : comparisons and lessons learned

, 2012
Purpose: To create an overview and evaluation of the achievements of the contributions in this book by identifying, summarising and discussing cross-cutting themes and essential learning points across the former chapters.
Coenen, Christian, Sarasoja, Anna-Liisa, van der Voordt, Theo, Jensen, Per Anker   +3 more
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PATRIMONIAL RESOURCES’ MANAGEMENT AND EFFECTS ON THE ECONOMIC VALUE ADDED [PDF]

. The core elements of one firm’s existence as the patrimonial situation andperformance, are related in a great measure by the business strategy adopted, the economicenvironment in which it is operating and the way of resources’ management.
Vasile Burja“1 Decembrie 1918†University of Alba Iulia, Camelia Burja“1 Decembrie 1918†University of Alba Iulia   +1 more
core  

Self-modulated hydrogen electrocatalysis on sub-2-nm platinum nanoparticles by in situ generated surface hydrides

Nature Communications
Revealing the surface structure evolution under working conditions is crucial for understanding the activity and stability of electrocatalysts. Platinum, the state-of-the-art electrocatalyst for hydrogen oxidation in fuel cells or hydrogen evolution in ...
Liang Chang, Yangfan Shao, Linqing Miao, Yuyuan Jiang, Qingqing Lu, Sijie Wang, Feiyu Kang, Jia Li, Lin Gan   +8 more
doaj   +1 more source