Physical-chemical environment of microbes

2011 ◽  
pp. 35-54
Author(s):  
David L. Kirchman
Keyword(s):  
Chemical Environment ◽  
Physical Chemical

scholarly journals KAJIAN STRUKTUR KOMUNITAS EPIFAUNA TANAH DI KAWASAN HUTAN KONSERVASI GUNUNG SIBELA HALMAHERA SELATAN MALUKU UTARA

2011 ◽  
Vol 2 (1) ◽  
Author(s):  
Abdu Mas'ud ◽  
Sundari Sundari
Keyword(s):  
Animal Ecology ◽  
Diversity Index ◽  
Pitfall Trap ◽  
Chemical Environment ◽  
Research Focus ◽  
Physical Chemical ◽  
Genus 2 ◽  
Environment Factor ◽  
Relationship Of

This research to know: (1) Biodiversity  land epifauna; (2) Relationship of environment factor physical-chemical  with land epifauna biodiversity in conservation  at area Forest Mount of Sibela. This method is Descriptif research with Pitfall trap Technique to collect land epifauna. The result of this research were : 1) Land epifauna at this research counted 74 species of epifauna which consist of 4 class, 18 ordo, 36 family and 63 genus; 2) Biodiversity of land epifauna at conservation forest shall be as follows: a) diversity index equal to 1,46475 category, b) eveness index equal to 0,35089 category of balanced, c) dominate index equal to 0,06280 category of to lower, d) important value of highest at species of Formica sanguine equal to 11,9817; 3) There are relationship is  significant between of physical-chemical environment factor with diversity index. Found of this research can be exploited for the development of study of ecology concept and practical contribution about procedure research of simple desain of  technique making of trap of land epifauna in the form of Pitfall trap at research focus of animal ecology (land arthropod) and also Entomological in Khairun of Ternate University.

The physical-chemical environment of microbes

2018 ◽  
Author(s):  
David L. Kirchman
Keyword(s):  
Reynolds Number ◽  
Low Reynolds Number ◽  
Chemical Properties ◽  
Physical World ◽  
Chemical Environment ◽  
Viscous Forces ◽  
Physical Chemical ◽  
Terrestrial Habitats ◽  
Low Reynolds ◽  
Living Organisms

Many physical-chemical properties affecting microbes are familiar to ecologists examining large organisms in our visible world. This chapter starts by reviewing the basics of these properties, such as the importance of water for microbes in soils and temperature in all environments. Another important property, pH, has direct effects on organisms and indirect effects via how hydrogen ions determine the chemical form of key molecules and compounds in nature. Oxygen content is also critical, as it is essential to the survival of all but a few eukaryotes. Light is used as an energy source by phototrophs, but it can have deleterious effects on microbes. In addition to these familiar factors, the small size of microbes sets limits on their physical world. Microbes are said to live in a “low Reynolds number environment”. When the Reynolds number is smaller than about one, viscous forces dominate over inertial forces. For a macroscopic organism like us, moving in a low Reynolds number environment would seem like swimming in molasses. Microbes in both aquatic and terrestrial habitats live in a low Reynolds number world, one of many similarities between the two environments at the microbial scale. Most notably, even soil microbes live in an aqueous world, albeit a thin film of water on soil particles. But the soil environment is much more heterogeneous than water, with profound consequences for biogeochemical processes and interactions among microbes. The chapter ends with a discussion of how the physical-chemical environment of microbes in biofilms is quite different from that of free-living organisms.

scholarly journals The Application of Novel Research Technologies by the Deep Pelagic Nekton Dynamics of the Gulf of Mexico (DEEPEND) Consortium

2018 ◽  
Vol 52 (6) ◽  
pp. 81-86 ◽  
Author(s):  
Rosanna J. Milligan ◽  
Andrea M. Bernard ◽  
Kevin M. Boswell ◽  
Heather D. Bracken-Grissom ◽  
Marta A. D'Elia ◽  
...  
Keyword(s):  
Gulf Of Mexico ◽  
Deep Ocean ◽  
Scientific Understanding ◽  
Open Ocean ◽  
Cutting Edge ◽  
Chemical Environment ◽  
Computational Tools ◽  
Deep Waters ◽  
Physical Chemical ◽  
Pelagic Nekton

AbstractThe deep waters of the open ocean represent a major frontier in exploration and scientific understanding. However, modern technological and computational tools are making the deep ocean more accessible than ever before by facilitating increasingly sophisticated studies of deep ocean ecosystems. Here, we describe some of the cutting-edge technologies that have been employed by the Deep Pelagic Nekton Dynamics of the Gulf of Mexico (DEEPEND; <ext-link ext-link-type="uri" href="http://www.deependconsortium.org">www.deependconsortium.org</ext-link>) Consortium to study the biodiverse fauna and dynamic physical-chemical environment of the offshore Gulf of Mexico (GoM) from 0 to 1,500 m.

Transmission Electron Microscopy of Protein Macromolecules

1971 ◽  
Vol 29 ◽  
pp. 424-425
Author(s):  
Henry S. Slayter
Keyword(s):  
Biological Systems ◽  
Metal Vapor ◽  
Resolving Power ◽  
Electron Microscopic ◽  
Chemical Methods ◽  
Molecular Weights ◽  
The Past ◽  
Physical Chemical ◽  
Transmission Electron

Electron microscopic methods have been applied increasingly during the past fifteen years, to problems in structural molecular biology. Used in conjunction with physical chemical methods and/or Fourier methods of analysis, they constitute powerful tools for determining sizes, shapes and modes of aggregation of biopolymers with molecular weights greater than 50, 000. However, the application of the e.m. to the determination of very fine structure approaching the limit of instrumental resolving power in biological systems has not been productive, due to various difficulties such as the destructive effects of dehydration, damage to the specimen by the electron beam, and lack of adequate and specific contrast. One of the most satisfactory methods for contrasting individual macromolecules involves the deposition of heavy metal vapor upon the specimen. We have investigated this process, and present here what we believe to be the more important considerations for optimizing it. Results of the application of these methods to several biological systems including muscle proteins, fibrinogen, ribosomes and chromatin will be discussed.

Seeking to uncover biology's chemical roots

2019 ◽  
Vol 3 (5) ◽  
pp. 435-443 ◽  
Author(s):  
Addy Pross
Keyword(s):  
Environmental Changes ◽  
Biological Systems ◽  
Significant Development ◽  
The Road ◽  
Physical Chemical ◽  
Systems Chemistry ◽  
Biological World ◽  
Inanimate Matter ◽  
The Origin Of Life ◽  
Opening Up

Despite the considerable advances in molecular biology over the past several decades, the nature of the physical–chemical process by which inanimate matter become transformed into simplest life remains elusive. In this review, we describe recent advances in a relatively new area of chemistry, systems chemistry, which attempts to uncover the physical–chemical principles underlying that remarkable transformation. A significant development has been the discovery that within the space of chemical potentiality there exists a largely unexplored kinetic domain which could be termed dynamic kinetic chemistry. Our analysis suggests that all biological systems and associated sub-systems belong to this distinct domain, thereby facilitating the placement of biological systems within a coherent physical/chemical framework. That discovery offers new insights into the origin of life process, as well as opening the door toward the preparation of active materials able to self-heal, adapt to environmental changes, even communicate, mimicking what transpires routinely in the biological world. The road to simplest proto-life appears to be opening up.

ANALISIS FISIKA KIMIA DARI KERANG DARA (Anadara granosa) YANG BERASAL DARI KAYUTANYO KAB. BANGGAI The Analysis of physical chemical from dara shells (Anadara granosa) origin from Kayutanyo, Kab.Banggai

2018 ◽  
Vol 2 (2) ◽  
Author(s):  
SULASMI ANGGO
Keyword(s):  
Protein Content ◽  
Water Content ◽  
Water Solubility ◽  
Gravimetric Method ◽  
Fat Content ◽  
Carbohydrate Content ◽  
Dust Content ◽  
Total Dust ◽  
Physical Chemical ◽  
Anadara Granosa

The Analysis of physical chemical from dara shells (Anadara granosa) origin from Kayutanyo, kab. Banggai, has been conducted.Dara shell meat is sleaned and dried and after that powered with blender. Determine % rendement, water bonding capacity and index water solubility with Anderson method, coarse fat content with gravimetric method and carbohydrate method with “bye difference” decrease method.The result of analysis showed rendement value is 24,35%, water bonding capacity is 1,6248 gram/ml, index water solubility is 0,202 gram/ml, water content is 79,0045%, total dust content is 1,072%, coarse protein content is 2,25%, coarse fat content is 8,47%, carbohydrate content is 9,2035%. Keyword : Dara shells, (Anadara granosa), analysis physical chemical

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