Results 81 to 90 of about 4,928,457 (285)
NATURAL RESOURCES: Economics-Ecology-Management
Ekonomika Poljoprivrede (1979), 2008 Монографија ''ПРИРОДНИ РЕСУРСИ: ЕКОНОМИЈА-ЕКОЛОГИЈА-УПРАВЉАЊЕ'' Аутори: Др Милан Р. Милановић, др Драго Цвијановић, др Горица Цвијановић Издавач: Институт за економику пољопривреде, Београд, 2008.
Милутин Т. Ђоровић
doaj
Advanced Engineering Materials, EarlyView.High‐temperature interactions between low‐sulfur Al‐killed Mn–B steel and MgO–C refractories (0 and 50 wt% recyclates) are studied via finger immersion tests (1600 °C). Surface‐active elements influence infiltration. MgO/CaS layer forms, along with spinel and calcium silicate.
Matheus Roberto Bellé +5 more
wiley +1 more source
Natural Reserve System: Putting the “Nature” in “Natural Resources”
California Agriculture, 1991 California Agriculture - All ...
K Farrell
doaj
Dynamic optimization in natural resources management [PDF]
Dynamic modeling is general and recently the most interesting perspective to solve a dynamic economic problem based on Pontryagin’s maximum principle. Moreover traditional economic theory, up to the middle of twentieth century, builds up the production ...
Halkos, George
core +1 more source
Zein‐Based Adhesives: Sustainable Extraction and Application in Bioadhesive Technologies
Advanced Engineering Materials, EarlyView.Zein is extracted from corn gluten meal using a simple and scalable process with high yield (~90%). The resulting protein is applied in bioadhesives modified with Ca2+ and Fe3+ ions, exhibiting substrate‐dependent adhesion. The findings demonstrate competitive bonding performance and highlight the role of ionic interactions in tuning adhesion ...
Paula Bertolino Sanvezzo +3 more
wiley +1 more source
Application of Raman and Photoluminescence Spectroscopy to MgO‐C Refractories
Advanced Engineering Materials, EarlyView.Visible to near infrared luminescence of MgO is studied on MgO‐C bricks and nominally pure MgO powder, with focus on two similar sharp high‐intensity signals, at 699 and 871 nm, each surrounded by symmetrical sidebands. The nature of these sidebands is investigated by temperature‐dependent spectroscopic measurements, confirming phonon involvement by ...
Julia Richter +5 more
wiley +1 more source
The greenhouse gas emissions of the most remarkable Finnish fish product chains
Scientific ReportsThis study focuses on counting the greenhouse gas emissions of the most common Finnish fish products. The selected fish species were rainbow trout (Oncorhynchus mykiss), Baltic herring (Clupea harengus membras), pikeperch (Sander lucioperca), perch ...
Frans Silvenius +8 more
doaj +1 more source
Renewable Natural Resources and Endogenous Growth [PDF]
We study a two-sector endogenous growth model where a single consumption good is obtained using a renewable resource in combination with physical capital. Both inputs are essential for production and technical substitutes.
J. AZNAR-MARQUEZ, J.R. Ruiz-Tamarit
core
Natural resources of Lake Earl and Smith River Delta [PDF]
, 1975 The Lake Earl/Smith River Delta area is a key coastal wetland situated in northern California. The Lake and Delta have retained much of their value to wildlife and serve as an important link in a chain of such wetlands that extend southward along the ...
Browning, Bruce M. +6 more
core
Advanced Engineering Materials, EarlyView.The presented study focuses on the fracture behaviour of carbon‐bonded magnesia MgO–C refractories, where environmentally friendly fructose, collagen and lignin serve as temporary binding agents. The partial substitution of the source material with recycled MgO–C reduces the fracture resistance, which can be counteracted by the additional introduction ...
Marc Neumann +6 more
wiley +1 more source