9 results match your criteria inside macroaggregates

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60 years of fertilization and liming impacts on soil organic carbon stabilization in a sub-tropical Alfisol.

Environ Sci Pollut Res Int 2021 Apr 21. Epub 2021 Apr 21.

Environmental Sciences and Biomedical Metrology Division, CSIR-National Physical Laboratory, New Delhi, 110012, India.

Limited information is available on the C stabilization mechanism of tropical soils under different management practices including long-term organic manuring, mineral fertilization alone, or in combination with lime. Hence, to understand the effect of continuous application (for 60 years) of organic manure, fertilizer, and lime alone or in combination on an acidic Alfisol, stabilization of soil organic carbon (SOC) was evaluated under maize (Zea mays L.) wheat (Triticum aestivum L. Read More

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[Response of Aggregate Distribution to Input Straw and Their Linkages to Organic Carbon Mineralization in Soils Developed from Five Different Parent Materials].

Huan Jing Ke Xue 2020 Jun;41(6):2842-2851

School of Environmental and Resource Sciences, Zhejiang University, Hangzhou 310058, China.

Development and the dynamics of stable aggregates in many soils are known to be closely related to the cycling as well as accumulation of soil organic carbon (SOC). This study explored the aggregation processes and distributions of soil organic carbon in soils developed from limestone (L), quaternary red earth (Q), granite (G), basalt (B), and tertiary red sandstone (T) subtropical China related to the addition of maize residues during 7 days and 184 days of incubation. The soils were sieved to<0. Read More

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Soil aggregation and carbon stabilization in burn and no-burn sugarcane management systems.

An Acad Bras Cienc 2018 Aug 25;90(2 suppl 1):2459-2467. Epub 2018 Jun 25.

Departamento de Agronomia, Centro de Ciências Agrárias, Universidade Estadual de Londrina, Rod. Celso Garcia Cid, Km 380, 86057-970 Londrina, PR, Brazil.

Retaining sugarcane straw over the soil after harvesting can improve soil structure and increase soil carbon stabilization, mainly in macroaggregates. We evaluated the carbon content in the aggregate classes in areas under burn and no-burn (adopted for five years) sugarcane management systems, focusing on the superficial layer (0.00-0. Read More

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Effects of Agaricus lilaceps fairy rings on soil aggregation and microbial community structure in relation to growth stimulation of western wheatgrass (Pascopyrum smithii) in Eastern Montana rangeland.

Microb Ecol 2013 Jul 1;66(1):120-31. Epub 2013 Mar 1.

United States Department of Agriculture, Agricultural Research Service, Sidney, MT 59270, USA.

Stimulation of plant productivity caused by Agaricus fairy rings has been reported, but little is known about the effects of these fungi on soil aggregation and the microbial community structure, particularly the communities that can bind soil particles. We studied three concentric zones of Agaricus lilaceps fairy rings in Eastern Montana that stimulate western wheatgrass (Pascopyrum smithii): outside the ring (OUT), inside the ring (IN), and stimulated zone adjacent to the fungal fruiting bodies (SZ) to determine (1) soil aggregate proportion and stability, (2) the microbial community composition and the N-acetyl-β-D-glucosaminidase activity associated with bulk soil at 0-15 cm depth, (3) the predominant culturable bacterial communities that can bind to soil adhering to wheatgrass roots, and (4) the stimulation of wheatgrass production. In bulk soil, macroaggregates (4. Read More

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Phytoplankton size-distribution and community structure in relation to mucilage occurrence in the northern Adriatic Sea.

Sci Total Environ 2005 Dec 4;353(1-3):204-17. Epub 2005 Oct 4.

Dipartimento di Scienze del mare, Università Politecnica delle Marche, Via Brecce Bianche, 60131, Ancona, Italy.

The spatial and temporal variations of pico-, nano- and microphytoplankton abundance and composition were investigated over a 37 month period, focusing on the ecological role of different size classes of phytoplankton, and on the changes of the community structure that might occur during periods when large mucilage macroaggregates appear. Samples were collected monthly from June 1999 to July 2002 at 11 stations, along three transects covering the northern Adriatic basin. Highest abundances were observed in late-winter/spring for microphytoplankton (mainly diatoms), in spring-summer for nanophytoplankton, and in summer for picophytoplankton. Read More

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December 2005

Distribution of radiation in synovectomy of the knee with 166Ho-FHMA using image fusion.

Cancer Biother Radiopharm 2005 Jun;20(3):333-7

Department of Nuclear Medicine, Central Finland Central Hospital, Jyväskylä, Finland.

Background: Radiation synovectomy is an effective technique for the treatment of chronic synovitis in patients with rheumatoid arthritis (RA), and is an alternative for surgical synovectomy. Holmium ferric hydroxide macroaggregates (166Ho-FHMA) is suitable for radiation synovectomy, especially because it emits high-energy beta particles and a smaller proportion of low-energy photons that are suitable for gamma-camera imaging.

Objective: The aim of this study was to develop a method to fuse 166Ho-FHMA single photon emission computed tomography (SPECT) and magnetic resonance (MRI) images, to show the distribution of 166Ho-FHMA inside the joint with images that localize synovitis. Read More

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Microcarrier culture of lepidopteran cell lines: implications for growth and recombinant protein production.

Biotechnol Prog 2002 Nov-Dec;18(6):1345-55

Unit of Bioengineering, Place Croix du Sud 2/19, Cell Bioengineering Group, University of Louvain, B-1348 Louvain-la-Neuve, Belgium.

Several microcarrier systems were screened with Sf-9 and High-Five cell lines as to their ability to support cell growth and recombinant (beta-galactosidase) protein production. Growth of both cell lines on compact microcarriers, such as Cytodex-1 and glass beads, was minimal, as cells detached easily from the microcarrier surface and grew as single cells in the medium. Cell growth was also problematic on Cytopore-1 and -2 porous microcarriers. Read More

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A new scintigraphic method to characterize ultrafiltration in hollow fiber dialyzers.

Kidney Int 1992 May;41(5):1383-93

Department of Nephrology, St. Bortolo Hospital, Vicenza, Italy.

Ultrafiltration and pressure profiles in hollow fiber dialyzers with different hydraulic permeabilities have been investigated with a new scintigraphic method. Radiolabelled albumin macroaggregates, used as a nondiffusible marker molecule, were added to the blood in an in vitro circuit and circulated through cuprophan and polysulphon dialyzers. Since the marker molecule was too big to cross the dialysis membrane, its changes in concentration were assumed to occur in response to the variation of the blood water content (filtration or back-filtration). Read More

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Effect of microgravity on the respiratory system.

L A Engel

J Appl Physiol (1985) 1991 May;70(5):1907-11

Thoracic Medicine Unit, Westmead Hospital, Sydney, New South Wales, Australia.

Because the pleural pressure gradient and regional distribution of pulmonary function are gravity dependent, substantial changes may be expected during weightlessness. Although very few measurements have been made during spaceflights, a number of observations during brief periods of weightlessness inside aircraft flying with parabolic trajectories confirm these predictions. Single-breath N2 washouts suggest a marked reduction in the inequality of ventilation distribution seen at 1 G. Read More

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