Results 51 to 60 of about 4,443,421 (294)

Assessment of tillage systems in organic farming: influence of soil structure on microbial biomass. First results [PDF]

, 2007
Soil tillage modifies environmental conditions of soil microorganisms and their ability to release nitrogen. We compare the influence of reduced tillage (RT) and mouldboard ploughing (MP) on the soil microbial functioning in organic farming.
Chaussod, Rémi, Peigné, Joséphine, Roger-Estrade, Jean, Vian, Jean François   +3 more
core  

Evolutionarily divergent DUF4465 domains have a common vitamin B12‐binding function

FEBS Open Bio, EarlyView.
We show that DUF4465 family proteins, widespread across bacteria from gut microbiomes, hydrothermal vents, and soil, share a common vitamin B12‐binding function. These augmented β‐jellyroll proteins bind vitamin B12 via extended loops. Our findings establish sequence‐diverse DUF4465 proteins as a widespread class of B12‐binding proteins, highlighting ...
Charlea Clarke, Michal Banasik, Rokas Juodeikis, Martin J. Warren, Richard W. Pickersgill   +4 more
wiley   +1 more source

ECONOMIC EVALUATION OF AGRICULTURAL LAND IN THE TOWN COVACI, TIMIS COUNTY [PDF]

Scientific Papers Series : Management, Economic Engineering in Agriculture and Rural Development, 2013
The goal of the present paper is to get information concerning the technical and fertility features of agricultural lands to be able to determine their present general production capacity in different crops and, implicitly, the uses that underlies ...
Anişoara DUMA COPCEA, Nicoleta MATEOC - SIRB, Teodor MATEOC – SIRB, Casiana MIHUT   +3 more
doaj  

Superposition Effects of Zinc Smelting Atmospheric Deposition on Soil Heavy Metal Pollution Under Geochemical Anomaly

Frontiers in Environmental Science, 2022
Guizhou Province is covered by a large area of carbonate rocks where, with a higher background of heavy metals under the geochemical anomaly, more than 3.6 × 105 ha of heavy metal–contaminated soil in the northwest area is related to historical ...
Enjiang Yu, Hongyan Liu, Hongyan Liu, Yu Tu, Xiaofeng Gu, Xiaozhui Ran, Zhi Yu, Zhi Yu, Pan Wu, Pan Wu   +9 more
doaj   +1 more source

Current Tracking Adaptive Control of Brushless DC Motors

International Journal of Adaptive Control and Signal Processing, EarlyView.
In this paper, the current tracking for Brushless Direct Current motors is approached considering uncertainty in the parameters of the motor's model. An adaptive control scheme to compensate electrical parameters uncertainty is proposed without requiring any knowledge of the mechanical parameters.
Fernanda Ramos‐García, Axel Coronado‐Andrade, Gerardo Espinosa‐Pérez, Luis Alvarez‐Icaza   +3 more
wiley   +1 more source

Searching the critical soil organic carbon threshold for satisfactory tilth conditions – test of the Dexter clay:carbon hypothesis [PDF]

, 2010
The concern for deteriorating soil structure at low soil organic matter (SOM) contents calls for better knowledge of SOM interaction with soil minerals as well as guidelines for soil conservation.
Christensen, B.T., de Jonge, L.W., Moldrup, P., Olesen, J.E., Schjønning, P.   +4 more
core  

Impact of Biofield Energy Treatment on Soil Fertility [PDF]

, 2015
Measurement of soil components such as microbial population, minerals and obviously the content of organic carbon play the important roles for the productivity of crops and plants. The present study was attempted to evaluate the impact of Mr.
Alice, Branton, Dahryn, Trivedi, Gopal, Nayak, Mahendra Kumar, Trivedi   +3 more
core   +1 more source

Advancing Research on Biomaterials and Biological Materials with Scanning Electron Microscopy under Environmental and Low Vacuum Conditions

Advanced Engineering Materials, EarlyView.
Herein, environmental scanning electron microscopy (ESEM) is discussed as a powerful extension of conventional SEM for life sciences. By combining high‐resolution imaging with variable pressure and humidity, ESEM allows the analysis of untreated biological materials, supports in situ monitoring of hydration‐driven changes, and advances the functional ...
Jendrian Riedel, Lea Dierker, Antoine Eyram Kwame, Kim Nora Wagner, Jonas J. Unterholzner, Jan‐Henning Dirks, Dorothea Brüggemann   +6 more
wiley   +1 more source

Proximate controls on semiarid soil greenhouse gas fluxes across 3 million years of soil development [PDF]

, 2015
Soils are important sources and sinks of three greenhouse gases (GHGs): carbon dioxide (CO2), methane (CH4), and nitrous oxide (N2O). However, it is unknown whether semiarid landscapes are important contributors to global fluxes of these gases, partly ...
Hart, SC, Hungate, BA, Nasto, MK, Sullivan, BW   +3 more
core   +1 more source

Electrical Conductivities of Conductors, Semiconductors, and Their Mixtures at Elevated Temperatures

Advanced Engineering Materials, EarlyView.
This article presents a comprehensive review of temperature‐dependent electrical conductivity data for multiple material classes at elevated temperatures, highlighting a persistent conductivity gap between metals and semiconductors in the range of 102$\left(10\right)^{2}$– 107$\left(10\right)^{7}$ S/m. Metal–ceramic irregular metamaterials are proposed
Valentina Torres Nieto, Marcia A. Cooper
wiley   +1 more source