Helmut Brandl

University of Zurich

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Reinhard Bachofen

University of Zurich

Gerhard Furrer

ETH Zurich

Walter Krebs

ZHAW Zurich University of Applied Sciences

Mohammad Ali Faramarzi

Biotechnology Research Center

R. Clinton Fuller

University of Massachusetts Amherst

Richard A. Gross

Rensselaer Polytechnic Institute

Robert W. Lenz

Pontifícia Universidade Católica do Rio Grande do Sul

Kurt Hanselmann

ETH Zurich

Michael Plötze

ETH Zurich

Bernhard Schmid

University of Zurich

Cooperative Institutions

University of Zurich

ETH Zurich

École Polytechnique Fédérale de Lausanne

University of Basel

Swiss Federal Institute of Aquatic Science and Technology

ZHAW Zurich University of Applied Sciences

Chinese Academy of Sciences

University of Tirana

Board of the Swiss Federal Institutes of Technology

Swiss Federal Institute for Forest, Snow and Landscape Research

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Variability in microbial populations in soil highly polluted with heavy metals on the basis of substrate utilization pattern analysis

Journal of Soils and Sediments (2001)

Roger Dobler Pascal Burri Katalin Gruiz Helmut Brandl Reinhard Bachofen

Metabolic activity

Soil test

10.1007/bf02986478

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Citations (17)

The biosynthesis and characterization of poly(β-hydroxyalkanoates) produced by Pseudomonas oleovorans

Macromolecules (1989)

Richard A. Gross Christopher DeMello Robert W. Lenz Helmut Brandl R. Clinton Fuller

ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTThe biosynthesis and characterization of poly(β-hydroxyalkanoates) produced by Pseudomonas oleovoransRichard A. Gross, Christopher DeMello, Robert W. Lenz, Helmut Brandl, and R. Clinton FullerCite this: Macromolecules 1989, 22, 3, 1106–1115Publication Date (Print):March 1, 1989Publication History Published online1 May 2002Published inissue 1 March 1989https://doi.org/10.1021/ma00193a018RIGHTS & PERMISSIONSArticle Views649Altmetric-Citations236LEARN ABOUT THESE METRICSArticle Views are the COUNTER-compliant sum of full text article downloads since November 2008 (both PDF and HTML) across all institutions and individuals. These metrics are regularly updated to reflect usage leading up to the last few days.Citations are the number of other articles citing this article, calculated by Crossref and updated daily. Find more information about Crossref citation counts.The Altmetric Attention Score is a quantitative measure of the attention that a research article has received online. Clicking on the donut icon will load a page at altmetric.com with additional details about the score and the social media presence for the given article. Find more information on the Altmetric Attention Score and how the score is calculated. Share Add toView InAdd Full Text with ReferenceAdd Description ExportRISCitationCitation and abstractCitation and referencesMore Options Share onFacebookTwitterWechatLinked InReddit PDF (2 MB) Get e-Alertsclose Get e-Alerts

Characterization

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10.1021/ma00193a018

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Citations (291)

Uptake and Distribution of Stable Strontium in 26 Cultivars of Three Crop Species: Oats, Wheat, and Barley for Their Potential Use in Phytoremediation

International Journal of Phytoremediation (2014)

Lin Qi Xiaoliang Qin Feng‐Min Li Kadambot H. M. Siddique Helmut Brandl

The main objective of this study was to investigate the accumulation and distribution of strontium (Sr) in 26 cultivars of wheat (Triticum aestivum L.), husk oat (Avena sativa L) and naked oat (Avena nuda), and barley (Hordeum vulgare L.) for their potential use in phytoremediation.Sr levels had no effect on the accumulation of shoot biomass at tillering or at maturity. Mean shoot Sr concentration of naked oat and barley at tillering was significantly (P<0.05) higher than that of wheat; Neimengkeyimai-1, a naked oat cultivar, had the highest Sr concentrations. At maturity, of four naked oat cultivars, Neimengkeyimai-1 had the highest Sr content at all measured Sr levels. Leaves had the highest Sr concentrations, followed by roots and straw, and then grain with the lowest. Mean enrichment coefficients from soil to shoots ranged from 0.521 to 1.343; the percentage of stable Sr removed from the soil to the shoots at harvest time was more than 1.4% after 120 days. Neimengkeyimai-1 could be used as a model for further research to find more effective cultivars; and naked oat plants could be selected for phytoremediation to clean up contaminated soil.

Avena

Husk

10.1080/15226514.2014.898016

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Citations (38)

Bioaerosols in Indoor Environment - A Review with Special Reference to Residential and Occupational Locations

The Open Environmental & Biological Monitoring Journal (2011)

Helmut Brandl

Bioaerosols such as bacterial and fungal cells and their spores are -along with non-biological particles -part of indoor airborne particulate matter and have been related since a long time to health issues of human beings as well as flora, and fauna.To identify the different risks and to establish exposure thresholds, microbiology of air samples from a series of indoor environments must be characterized, i.e. the different microorganisms (bacteria and fungi) must be identified and quantified.This review discusses the techniques of air sampling and sample analysis.In addition, a literature study has been performed regarding the levels of these microorganisms in various indoor occupational (e.g., schools, offices, hospitals, museums) and dwelling environments.These results will provide a significant scientific basis for indoor air quality control and help in elaborating risk prevention programs for workers and dwellers.This review shall contribute to the knowledge of identification and quantification of airborne microbial constituents in various indoor environments.Combining the indoor microbial load data with data from studies focusing on health effects caused by inhalation of specific airborne microorganisms will allow the evaluation of various risks to which inhabitants are exposed.

Indoor bioaerosol

Indoor air

10.2174/1875040001104010083

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Citations (218)

The role of sediments in the phosphorus cycle in Lake Lugano. II. Seasonal and spatial variability of microbiological processes at the sediment-water interface

Aquatic Sciences (1992)

Maja A. Lazzaretti Kurt Hanselmann Helmut Brandl Daniel Span Reinhard Bachofen

Biogeochemical Cycle

Sediment–water interface

Cycling

10.1007/bf00878142

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Citations (27)

Air as habitat for microorganisms : temporal bioaerosol dynamics and distribution in an indoor environment

Astrid von Däniken Helmut Brandl Walter Krebs Carmen Hitz

Bioaerosol

Source

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Selection in monoculture vs. mixture alters plant metabolic fingerprints

Journal of Plant Ecology (2014)

Debra Zuppinger‐Dingley Dan F. B. Flynn Helmut Brandl Bernhard Schmid

In grassland biodiversity experiments, positive biodiversity effects on primary productivity increase over time. Recent research has shown that differential selection in monoculture and mixed-species communities leads to the rapid emergence of monoculture and mixture types, adapted to their own biotic community. We used eight plant species selected for 8 years in such a biodiversity experiment to test if monoculture and mixture types differed in metabolic profiles using infrared spectroscopy. Fourier transform infrared spectroscopy (FTIR) was used to assess metabolic fingerprints of leaf samples of 10 individuals of each species from either monocultures or mixtures. The FTIR spectra were analyzed using multivariate procedures to assess (i) whether individuals within species could be correctly assigned to monoculture or mixture history based on the spectra alone and (ii) which parts of the spectra drive the group assignment, i.e. which metabolic groups were subject to differential selection in monocultures vs. mixtures. Plant individuals within each of the eight species could be classified as either from monoculture or mixture selection history based on their FTIR spectra. Different metabolic groups were differentially selected in the different species; some of them may be related to defense of pathogens accumulating more strongly in monocultures than in mixtures. The rapid selection of the monoculture and mixture types within the eight study species could have been due to a sorting-out process based on large initial genetic or epigenetic variation within the species.

Monoculture

10.1093/jpe/rtu043

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Citations (14)

Umweltwissenschaften/Ökologie an Schweizer Hochschulen

GAIA - Ecological Perspectives for Science and Society (1994)

Helmut Brandl

10.14512/gaia.3.2.12

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Bioaerosols in Indoor Environment - A Review with Special Reference to Residential and Occupational Locations

The Open Environmental & Biological Monitoring Journal (2011)

Jyotshna Mandal Helmut Brandl

Bioaerosols such as bacterial and fungal cells and their spores are - along with non-biological particles - part of indoor airborne particulate matter and have been related since a long time to health issues of human beings as well as flora, and fauna. To identify the different risks and to establish exposure thresholds, microbiology of air samples from a series of indoor environments must be characterized, i.e. the different microorganisms (bacteria and fungi) must be identified and quantified. This review discusses the techniques of air sampling and sample analysis. In addition, a literature study has been performed regarding the levels of these microorganisms in various indoor occupational (e.g., schools, offices, hospitals, museums) and dwelling environments. These results will provide a significant scientific basis for indoor air quality control and help in elaborating risk prevention programs for workers and dwellers. This review shall contribute to the knowledge of identification and quantification of airborne microbial constituents in various indoor environments. Combining the indoor microbial load data with data from studies focusing on health effects caused by inhalation of specific airborne microorganisms will allow the evaluation of various risks to which inhabitants are exposed.

Indoor bioaerosol

Indoor air

Bioaerosol

Exposure Assessment

Identification

10.5167/uzh-53633

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Citations (146)

Squeeze-water analysis for the determination of microbial metabolites in lake sediments-Comparison of methods

Limnology and Oceanography (1992)

Reinhard Bolliger Helmut Brandl Patrick Höhener Kurt Hanselmann Reinhard Bachofen

We compared methods for extracting interstitial water from stratified sediments in Lake Geneva and Lake Zurich. Microbial metabolites (NH 4 + , NO 3 ‒ , NO 2 ‒ , SO 4 2‒ , Mn 2+ , Fe 2+ , PO 4 3‒ , DOC), pH, conductivity, and VFA (volatile fatty acids such as acetate and propionate) as well as more conservative chemical species (Na + , K + , Ca 2+ , Mg 2+ , and H 4 SiO 4 ) were analyzed in pore‐water samples collected with a high‐pressure squeezing‐filtration method and an in situ equilibrium diffusion technique. Both methods are useful if the limitations of their applicability are appreciated. Among the nonvolatile compounds, squeezing leads to increased concentrations of Na + , K + , HPO 4 2‒ , H 4 SiO 4 , NO 2 ‒ , and DOC. Intracellular metabolites from only partially lysed or still living sediment organisms may be released into the aqueous extract under the influence of very high pressures. The squeezing technique needs to be optimized for pressures that yield pore‐water sample volumes large enough for the required analyses but do not disrupt cells.

Filtration (mathematics)

10.4319/lo.1992.37.2.0448

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Citations (21)