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1,370 results on '"Longwell, John"'

1. Modeling the Thermal Decomposition of Chlorinated Hydrocarbons in an Ideal Turbulent Incinerator

Author

Kraft, Markus, Fey, Harald, Procaccini, Carlo, Longwell, John P., Sarofim, Adel F., Bockhorn, Henning, Arkeryd, Leif, editor, Engl, Heinz, editor, Fasano, Antonio, editor, Mattheij, Robert M. M., editor, Neittaanmäki, Pekka, editor, Neunzert, Helmut, editor, Brøns, Morton, editor, Bendsøe, Martin Philip, editor, and Sørensen, Mads Peter, editor

Published
1997
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10. Biocarbón derivado de excretas porcinas con capacidad de disminuir la disponibilidad de Pb en suelos agrícolas contaminados

Author

Cabello Torres, R. J., Romero Longwell, John Robert, Valdiviezo Gonzales, Lorgio, Munive Cerrón, Rubén, Castañeda Olivera, Carlos Alberto, Cabello Torres, R. J., Romero Longwell, John Robert, Valdiviezo Gonzales, Lorgio, Munive Cerrón, Rubén, and Castañeda Olivera, Carlos Alberto

Abstract

The use of organic amendments improves the quality and increases the fertility of the soils due to their adsorption properties, stimulates nutrient cycling and can be used to reduce the availability of heavy metals. The main objective of the research was to evaluate the effect of biochar (BC) derived from pig manure on the availability of Pb in a contaminated and limed agricultural soil. A randomized experimental design was applied, the pig manure was dried at room temperature (23 °C) and pyrolyzed at 500 °C for 2 h. Doses of 5%, 10% and 20% of BC were applied to the Pb soils contaminated (165.7 mg/kg), that were arranged in 2 kg pots except for the control sample, and Lactuca sativa was subsequently grown cultivated to evaluate the Pb availability. The results indicated an improvement in soil quality at higher BC dose, increase of 0.34 pH units, decrease of Pb extracted by EDTA (27% to 62% of decrease), and non-significant Pb content in leachates (< 1 mg Pb/L) and no detection in plant roots (< 0.01 mg/kg), except for the control plant (0.7 mg Pb/kg) in the original soil. A logarithmic relational model between BC dose and Pb adsorbed in the soil was obtained (R2 = 0.9938, p < 0.05) showing that the decrease of Pb availability in the soil increased for higher BC doses, which represents an eco-friendly remediation alternative. It is recommended to investigate the interaction relationships between the soil quality parameters and to establish functional models of bioaccumulation and extractable metal of the amended soil., El uso de enmiendas orgánicas mejora la calidad y aumenta la fertilidad de los suelos debido a sus propiedades de adsorción, estimula el ciclo de nutrientes y puede usarse para reducir la disponibilidad de metales pesados. El principal objetivo de la investigación fue evaluar el efecto del biocarbón (BC) derivado de las excretas porcinas sobre la disponibilidad de Pb en un suelo agrícola contaminado y encalado. Se aplicó un diseño experimental aleatorizado, las excretas de cerdo se secaron a temperatura ambiente (23 °C) y se pirolizaron a 500 °C durante 2 h. Se aplicaron dosis del 5%, 10% y 20% de BC a los suelos contaminados con Pb (165,7 mg/kg), que se dispusieron en macetas de 2 kg con excepción de la muestra control, y posteriormente se cultivó Lactuca sativa para evaluar la disponibilidad de Pb. Los resultados indicaron una mejora en la calidad del suelo a dosis más altas de BC, aumento de 0,34 unidades de pH, disminución de Pb extraído por EDTA (27% a 62% de disminución) y contenido no significativo de Pb en lixiviados (< 1 mg Pb/L) y sin detección en raíces de plantas (< 0,01 mg/kg), excepto para la planta de control (0,7 mg Pb/kg) en el suelo original. Se obtuvo un modelo relacional logarítmico entre la dosis de BC y el Pb adsorbido en el suelo (R2 = 0,9938, p < 0,05) que muestra que la disminución de la disponibilidad de Pb en el suelo aumentó para dosis más altas de BC, lo que representa una alternativa de remediación ecológica. Se recomienda investigar las relaciones de interacción entre los parámetros de calidad del suelo y establecer modelos funcionales de bioacumulación y metal extraíble del suelo enmendado.

Published
2021

13. Presence of chlorine radicals and formation of molecular chlorine in the post-flame region of chlorocarbon combustion

Author

Procaccini, Carlo, Bozzelli, Joseph W., Longwell, John P., Smith, Kenneth A., and Sarofim, Adel F.

Subjects
Flue gases -- Research, Pollution control industry -- Research, Refuse disposal industry -- Research, Environmental issues, Science and technology
Abstract

This study examines the presence of clorine (Cl) radicals and the formation of Cl (sub 2) in the late stages of chlorocarbon combustion and postcombustion cooling stages. The pathways that make the presence of chlorine radicals and Cl (sub 2) possible in flue gas from combustion systems are identified.

Published
2000

14. Bacterial mutagenicity of urban organic aerosol sources in comparison to atmospheric samples

Author

Hannigan, Michael P., Cass, Glen R., Lafleur, Arthur L., Longwell, John P., and Thilly, William G.

Subjects
Mutagenicity testing -- Research, Aerosols -- Research, Air pollution -- Environmental aspects, Environmental issues, Science and technology
Abstract

The bacterial mutagenicity of 15 contributors to organic aerosol emissions in the Los Angeles, CA, area is investigated. To determine the mutant fraction per microgram of organic carbon, the Salmonella typhimurium forward mutation assay is employed. The results, which show all combustion source samples to be mutagenic, are then compared to the mutagenicity of ambient aerosol samples collected in southern California.

Published
1994

15. Biocarbón derivado de excretas porcinas con capacidad de disminuir la disponibilidad de Pb en suelos agrícolas contaminados.

Author

Jaqueline Cabello-Torres, Rita, Romero-Longwell, John Robert, Valdiviezo-Gonzales, Lorgio, Munive-Cerrón, Rubén, and Alberto Castañeda-Olivera, Carlos

Subjects
*SOIL absorption & adsorption, *LETTUCE, *SOIL quality, *NUTRIENT cycles, *SOIL fertility, *LIMING of soils
Abstract

The use of organic amendments improves the quality and increases the fertility of the soils due to their adsorption properties, stimulates nutrient cycling and can be used to reduce the availability of heavy metals. The main objective of the research was to evaluate the effect of biochar (BC) derived from pig manure on the availability of Pb in a contaminated and limed agricultural soil. A randomized experimental design was applied, the pig manure was dried at room temperature (23 °C) and pyrolyzed at 500 °C for 2 h. Doses of 5%, 10% and 20% of BC were applied to the Pb soils contaminated (165.7 mg/kg), that were arranged in 2 kg pots except for the control sample, and Lactuca sativa was subsequently grown cultivated to evaluate the Pb availability. The results indicated an improvement in soil quality at higher BC dose, increase of 0.34 pH units, decrease of Pb extracted by EDTA (27% to 62% of decrease), and non-significant Pb content in leachates (< 1 mg Pb/L) and no detection in plant roots (< 0.01 mg/kg), except for the control plant (0.7 mg Pb/kg) in the original soil. A logarithmic relational model between BC dose and Pb adsorbed in the soil was obtained (R² = 0.9938, p < 0.05) showing that the decrease of Pb availability in the soil increased for higher BC doses, which represents an eco-friendly remediation alternative. It is recommended to investigate the interaction relationships between the soil quality parameters and to establish functional models of bioaccumulation and extractable metal of the amended soil. [ABSTRACT FROM AUTHOR]

Published
2021
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17. Editorial -- Distribution Still On Growth Track -- As prices decline and supply chain re-engineering accelerates, two-tier distribution is gaining share

Author

Longwell, John

Subjects
Industry trend, Retail/reseller channel, Wholesale dealer/distributor, Distribution channels -- Surveys, Distributors (Commerce) -- Market share
Abstract

As the Distributor Census data came pouring in over our fax machines, we were struck with one recurring question: Where were all these distributors coming from? Given the 40 percent […]

Published
1998

18. The supply lines are open

Author

Longwell, John

Subjects
Technology Information, Technology application, VAR, System design, Value-added resellers -- Services, System design -- Services, Computer engineering
Abstract

Smaller custom system builders now have more options than ever when it comes to obtaining reliable components. The pendulum is definitely swinging in favor of VARs building their own high-end […]

Published
1995

19. OC executives offer ideas on healthcare reform

Author

Longwell, John

Subjects
Health care industry -- Management, Health services administrators -- Management, Business, Business, regional
Abstract

Not surprisingly, most say marketplace is the solution When it comes to the U.S. healthcare system, there is widespread consensus on the issue: The system needs fixing. But after that, [...]

Published
1992

20. Technology roundtable

Author

Cook, Dan and Longwell, John

Subjects
High technology industry -- Economic aspects, Recessions -- Economic aspects -- California, Business, Business, regional
Abstract

A Q&A with 3 executives Editor's note: Three issues are high on the minds of most local business people: the recession, Japan and the business climate in Orange County. Following [...]

Published
1992

27. Channel Reengineering Approaches Critical Mass

Author

Longwell, John

Subjects
Channel assembly, Wholesale dealer/distributor, Industry trend, Reengineering, Computer industry -- Distribution
Abstract

This could be a watershed year in the reengineering of the channel as key elements of a better, faster, cheaper delivery of computer products start falling into place. Over the […]

Published
1998

28. Channel excecs place bets

Author

Longwell, John

Subjects
Industry trend, Internet, Retail/reseller channel, Wholesale dealer/distributor, Internet -- Forecasts and trends, Computer services industry -- Forecasts and trends
Abstract

It usually is not easy to get executives from the major distributors to agree on anything. However, there is quick unanimity when they are asked to identify the top emerging […]

Published
1996

29. Motherboard metamorphoses

Author

Longwell, John

Subjects
Motherboard, VAR, Industry trend, Market Entry, Intel Corp. -- Marketing -- 00304597, Value-added resellers, Motherboards
Abstract

While top-tier systems vendors may be nervous about Intel Corp.'s domination of PC system architecture, VARs in the private-label business have no such reservation. For VARs, the rise of Intel […]

Published
1996

30. Distributors open fire in Internet battle: information wars

Author

Longwell, John

Subjects
Market Trend/Market Analysis, Computer industry, Wholesale Dealer/Distributor, Computer industry -- Analysis, Distributors (Commerce) -- Marketing
Abstract

Master distributors are locked in an intense Internet-driven battle to give away one of their most precious assets: information. The winners of the battle could come to dominate the industry […]

Published
1996

31. Compaq earns crown; laptop victor beats Toshiba in major reseller support areas

Author

Longwell, John

Subjects
Laptop/portable computer, Notebook computer, Market trend/market analysis, Compaq Computer Corp. -- Achievements and awards -- 00301971, Laptop computers -- Achievements and awards, Notebook computers -- Achievements and awards, Computer industry -- Achievements and awards
Abstract

Judging from what resellers are saying, Compaq Computer Corp. is well positioned to pick up momentum in the notebook computer market, thanks to strategic investments made in the channel last […]

Published
1996

32. The art of finding the right pieces and parts

Author

Longwell, John

Subjects
Market Trend/Market Analysis, System design, VAR, System design -- Marketing, Value-added resellers -- Services, Computer systems integration -- Methods
Abstract

When memory, disk-drive and processor prices plunged during the first quarter, VARs building their own PCs were making hay-capitalizing on build-to-order and flexible sourcing capabilities. Small systems builders such as […]

Published
1996

33. Distribution pipe primed for flood

Author

Longwell, John

Subjects
Operating system, Product Information, Product distribution, Market Entry, Microsoft Corp. -- Marketing -- 00068489, Microsoft Windows 95 (Operating system) -- Distribution, Operating systems -- Distribution, Computer software industry -- Marketing
Abstract

Microsoft foots tab for extra arehouse spaces, extends credit terms While industry pundits debate how quickly the market will migrate to Microsoft Corp.'s new operating system, Microsoft distributors have already […]

Published
1995

34. The quest for software share

Author

Longwell, John

Subjects
Computer software industry, Wholesale Dealer Distributor, Industry trend, Market Trend Market Analysis, Ingram Micro Inc. -- Forecasts and trends, Tech Data Corp. (Clearwater, Florida) -- Forecasts and trends, Merisel Inc. -- Forecasts and trends, Computer software industry -- Forecasts and trends
Abstract

The pending release of Windows 95 sets the stage for an escalation of a distribution software sales battle that has seen the dominance of the two leading national wholesalers challenged […]

Published
1995

35. Finding the right source: buyer beware

Author

Longwell, John

Subjects
VAR, Technology Information, Technology application, Microcomputer industry, Value-added resellers -- Production management, Microcomputers -- Production management
Abstract

Quality products, not price, should be VARs' major concern when purchasing components from vendors and distributors. When it comes to building your own systems, purchasing components from reliable suppliers can […]

Published
1995

37. Access signs Novell, forges into networking

Author

Longwell, John

Subjects
Marketing Agreements, Distribution Agreements, Marketing Strategy, UNIX, Value-added resellers, Computer Systems Integrator, Network Operating System, Novell Inc. -- Distribution, Access Graphics Technology Inc. -- Contracts, Value-added resellers -- Contracts, Computer systems integrators -- Contracts, Network operating systems -- Distribution
Published
1994

38. Industrial players plod ahead: showdown in '93?

Author

Longwell, John

Subjects
Industry Analysts, Distributors, Market Share, Value-added resellers, Preview of Coming Year, Computer industry -- Distribution, Value-added resellers -- Distribution, Distributors (Commerce) -- Planning
Published
1993

41. UCI's fledgling bid for biotech glory

Author

Longwell, John

Subjects
Biotechnology laboratories -- Research, Biotechnology industry -- Management, Industrial districts -- Planning, Business, Business, regional, University of California, Irvine -- Research
Abstract

A hopeful sign: Licensing revenue rises to $10.6M UC Irvine has often been viewed as a self-absorbed ivory tower, with too many institutional impediments to act as an engine for [...]

Published
1992

42. The new order at AST: coup nothing new for Santoro; he says Safi is boss

Author

Longwell, John

Subjects
AST Research Inc. -- Management, Computer industry -- Management, Business, Business, regional
Abstract

Among those who know him, Carmelo Santoro's emergence as chairman of AST Research Inc. after the stunning ouster of co-founder and COO Thomas Yuen contains a sense of deja vu. [...]

Published
1992

43. He bleeds Big Blue but wears tan suit

Author

Longwell, John

Subjects
Western Digital Corp. -- Management, Computer storage device industry -- Management, Business, Business, regional
Abstract

Chuck Haggerty, polished and personable but notably minus a blue suit, is settling into his corner office at Western Digital Corp., ready to take charge of operations at the beleaguered [...]

Published
1992

45. Anderson trying to spark recovery at battered MAI

Author

Longwell, John

Subjects
MAI Systems Inc. -- Management, Computer industry -- Management, Corporate reorganizations -- Management, Business, Business, regional
Abstract

Peter S. Anderson is going by the book at MAI Systems Inc., killing the dogs, milking the cows and looking for new stars to try and revive the company's ailing [...]

Published
1992

46. With help from biggies, inventor eyes more deals

Author

Longwell, John

Subjects
Mahr Leonard Management Associates -- Services, Microprocessors -- Intellectual property, Electronics industry -- Licensing agreements, Patent licenses -- Management, Business consultants -- Services, Business, Business, regional
Abstract

Gilbert Hyatt may still face a battle to gain recognition as the inventor of the microprocessor, but there's no longer much doubt the Orange County computer engineer will end up [...]

Published
1992

47. Inside DDL's Northern Ireland electronics plant

Author

Longwell, John

Subjects
Data-Design Laboratories Inc. -- Foreign operations, Semiconductor industry -- Foreign operations, Business, Business, regional
Abstract

Anaheim-based Data-Design Laboratories recently announced plans to mothball its Anaheim circuit board plant, putting 180 out of work. Simultaneous with that announcement, Northern Ireland officials were showing off a new [...]

Published
1991

48. Taylor-Dunn acquired: new owners hope to double annual sales, up market share

Author

Longwell, John

Subjects
Taylor-Dunn Manufacturing Co. -- Mergers, acquisitions and divestments, Truck industry -- Mergers, acquisitions and divestments, Business, Business, regional
Abstract

Taylor-Dunn acquired ANAHEM - For 41 years, the privately held Taylor-Dunn Manufacturing Co. has been knocking out its rugged, little electric utility vehicles from a factory in Anaheim. The company [...]

Published
1990

49. Capp Care targets OC Medicare fraud

Author

Longwell, John

Subjects
CAPP CARE Inc. -- Management -- Finance, Medicare -- Finance, Preferred provider organizations (Medical care) -- Management, Company business management, Company financing, Business, Business, regional
Abstract

Capp Care targets OC Medicare fraud FOUNTAIN VALLEY -- Within the next two weeks, the 188,000 Medicare enrollees in Orange County will be mailed a directory of physicians as part [...]

Published
1990

50. Maverick Computers

Author

Longwell, John

Subjects
Computer industry, Microcomputer industry, Company growth, Computer industry -- Growth, Computer industry -- Market size, Computer industry -- Rankings
Published
2005

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