Show Advanced Search

REFINE YOUR SEARCH:

Containing Text
- - -
+
Filter by author or institution
GO
Filter by publication date
From:
October, 2006
Until:
Today
Filter by section

 
 

Development of Sulfidogenic Sludge from Marine Sediments and Trichloroethylene Reduction in an Upflow Anaerobic Sludge Blanket Reactor

1Bioprocesses Department, Laboratory of Environmental Biotechnology, Unidad Profesional Interdisciplinaria de Biotecnología, Instituto Politécnico Nacional, 2Laboratory of Molecular Biology, Escuela Superior de Medicina, Instituto Politécnico Nacional

JoVE 52956


 Environment

Generation of a Gene-Disrupted Streptococcus Mutans Strain Without Gene Cloning

1Department of Translational Research, Tsurumi University School of Dental Medicine, 2Endowed Department of International Oral Health Science (affiliated with Department of Translational Research), Tsurumi University School of Dental Medicine, 3Cariology and Operative Dentistry, Graduate School of Medical and Dental Sciences, Tokyo Medical and Dental University

Video Coming Soon

JoVE 56319


 JoVE In-Press

Preparation of Authigenic Pyrite from Methane-bearing Sediments for In Situ Sulfur Isotope Analysis Using SIMS

1School of Earth Sciences and Engineering, Sun Yat-sen University, 2School of Marine Sciences, Sun Yat-sen University, 3Guangdong Provincial Key Laboratory of Marine Resources and Coastal Engineering, 4South China Sea Bio-Resource Exploitation and Utilization Collaborative Innovation Center, 5Institut für Geologie, Universität Hamburg, 6Institut für Geologie und Paläontologie, Westfälische Wilhelms-Universität Münster, 7Guangzhou Marine Geological Survey

Video Coming Soon

JoVE 55970


 JoVE In-Press

Determining the Contribution of the Energy Systems During Exercise

1Laboratory of Applied Nutrition, School of Physical Education and Sport, University of Sao Paulo, 2Aerobic Performance Research Group, School of Physical Education and Sport, University of Sao Paulo, 3Laboratory of Neuromuscular Adaptations to Strength Training, School of Physical Education and Sport, University of Sao Paulo, 4Martial Arts and Combat Sports Research Group, School of Physical Education and Sport, University of Sao Paulo

JoVE 3413


 Biology

Co-culture of Living Microbiome with Microengineered Human Intestinal Villi in a Gut-on-a-Chip Microfluidic Device

1Department of Biomedical Engineering, The University of Texas at Austin, 2Wyss Institute for Biologically Inspired Engineering at Harvard University, 3Vascular Biology Program, Boston Children's Hospital, Harvard Medical School, 4John A. Paulson School of Engineering and Applied Sciences, Harvard University

JoVE 54344


 Bioengineering

Rapid Identification of Gram Negative Bacteria from Blood Culture Broth Using MALDI-TOF Mass Spectrometry

1Centre for Infectious Diseases and Microbiology Laboratory Services, Institute of Clinical Pathology and Medical Research, Westmead Hospital, 2Centre for Research Excellence in Critical Infection, Westmead Millennium Institute, Westmead Hospital, 3Sydney Emerging Infectious Diseases Institute, University of Sydney, Westmead Hospital

JoVE 51663


 Immunology and Infection

A Method to Assess Bacteriocin Effects on the Gut Microbiota of Mice

1Departamento de Biotecnología, Instituto de Agroquímica y Tecnología de Alimentos (IATA), Consejo Superior de Investigaciones Científicas (CSIC), 2Department of Food Safety and Infection Biology, Norwegian University of Life Sciences (NMBU), 3Departamento de Nutrición, Bromatología y Tecnología de los Alimentos, Facultad de Veterinaria, Universidad Complutense de Madrid (UCM), 4Faculty of Chemistry, Biotechnology and Food Science, Norwegian University of Life Sciences (NMBU)

JoVE 56053


 Biology

Determination of Moisture Content in Soil

JoVE 10011

Source: Laboratories of Dr. Ian Pepper and Dr. Charles Gerba - Arizona University
Demonstrating Author: Bradley Schmitz

Soils normally contain a finite amount of water, which can be expressed as the “soil moisture content.” This moisture exists within the pore spaces in between soil aggregates (inter-aggregate pore space) and within soil aggregates (intra-aggregate pore space) (Figure 1). Normally this pore space is occupied by air and/or water. If all the pores are occupied by air, the soil is completely dry. If all the pores are filled with water, the soil is said to be saturated. Figure 1. Pore space in soil.


 Essentials of Environmental Microbiology

Removal of Exogenous Materials from the Outer Portion of Frozen Cores to Investigate the Ancient Biological Communities Harbored Inside

1Biogeochemical Sciences Branch, Cold Regions Research and Engineering Laboratory, US Army Engineer Research & Development Center, Hanover, NH, 2Environmental Processes Branch, Environmental Laboratory, US Army Engineer Research & Development Center, Vicksburg, MS, 3Terrestrial and Cryospheric Scienes Branch, Cold Regions Research and Engineering Laboratory, US Army Engineer Research & Development Center, Hanover, NH, 4Biogeochemical Sciences Branch, Cold Regions Research and Engineering Laboratory, US Army Engineer Research & Development Center, Fairbanks, AK

JoVE 54091


 Biology

Mesenchymal Stromal Cell Culture and Delivery in Autologous Conditions: A Smart Approach for Orthopedic Applications

1Dept. of Clinical and Experimental Medicine, University of Pisa, 2OtoLab, Azienda Ospedaliero-Universitaria Pisana (AOUP), 3Dept. of Civil and Industrial Engineering, University of Pisa, 4Immunohematology Operative Unit, Azienda Ospedaliero-Universitaria Pisana (AOUP), 5Dept. Of Surgical, Medical, Molecular Pathology and Emergency Medicine, University of Pisa, 6II Orthopedic and Traumatologic Clinic, Azienda Ospedaliero-Universitaria Pisana (AOUP)

JoVE 54845


 Bioengineering

Culturing and Enumerating Bacteria from Soil Samples

JoVE 10099

Source: Laboratories of Dr. Ian Pepper and Dr. Charles Gerba - Arizona University
Demonstrating Authors: Bradley Schmitz and Luisa Ikner

Surface soils are a heterogeneous mixture of inorganic and organic particles that combine together to form secondary aggregates. Within and between the aggregates are voids or pores that visually contain both air and water. These conditions create an ideal ecosystem for bacteria, so all soils contain vast populations of bacteria, usually over 1 million per gram of soil. Bacteria are the simplest of microorganisms, known as prokaryotes. Within this prokaryotic group, there are the filamentous microbes known as actinomycetes. Actinomycetes are actually bacteria, but they are frequently considered to be a unique group within the classification of bacteria because of their filamentous structure, which consists of multiple cells strung together to form hyphae. This experiment uses glycerol case media that select for actinomycete colonies, during dilution and plating. Typically, actinomycetes are approximately 10% of the total bacterial population. Bacteria and actinomycetes are found in every environment on Earth, but the abundance and diversity of these microbes in soil is unparalleled. These microbes are also essential for human life and affect what people eat


 Essentials of Environmental Microbiology

An Overview of bGDGT Biomarker Analysis for Paleoclimatology

JoVE 10256

Source: Laboratory of Jeff Salacup - University of Massachusetts Amherst

Throughout this series of videos, natural samples were extracted and purified in search of organic compounds, called biomarkers, that can relate information on climates and environments of the past. One of the samples analyzed was sediment. Sediments accumulate over geologic time in basins, depressions in the Earth into which sediment flows through the action of fluid (water or air), movement, and gravity. Two main types of basins exist, marine (oceans and seas) and lacustrine (lakes). As one might guess, very different types of life live in these settings, driven in large part by the difference in salinity between them. Over the last few decades, organic geochemists discovered a toolbox of biomarker proxies, or compounds that can be used to describe climate or environment, some of which work in marine environments and some of which work in lacustrine. We turn our attention here to the lacustrine realm and branched glycerol dialkyl glycerol tetraethers (Figure 1). In this section we focus on analysis of terrestrial paleotemperature using branched glycerol dialkyl glycerol tetrathers (Figure 1; brGDGTs) and the MBT/CBT proxy. This proxy was initially described by Weijers et


 Essentials of Earth Science

Production of Chemicals by Klebsiella pneumoniae Using Bamboo Hydrolysate as Feedstock

1Lab of Biorefinery, Shanghai Advanced Research Institute, Chinese Academy of Sciences, 2University of Chinese Academy of Sciences, 3Biorefinery Research Center, Jeonbuk Branch Institute, Korea Research Institute of Bioscience & Biotechnology (KRIBB), 4School of Life Science and Technology, ShanghaiTech University

JoVE 55828


 Bioengineering

Techniques for the Evolution of Robust Pentose-fermenting Yeast for Bioconversion of Lignocellulose to Ethanol

1Bioenergy Research Unit, National Center for Agricultural Utilization Research, 2Mycotoxin Prevention and Applied Microbiology Research Unit, National Center for Agricultural Utilization Research, 3Chemical Engineering and Material Science, Great Lakes Bioenergy Center, Michigan State University

JoVE 54227


 Bioengineering

12
More Results...