نتایج جستجو برای: positive bacteria concentration in natural soil

تعداد نتایج: 17187662  

Journal: :تحقیقات آب و خاک ایران 0
حسین بشارتی سیداحمد سادات نوری امیربردیا نیکنیایی حمید ایران نژاد علی اکبری علیرضا فلاح نصرت آبادی

application of sulfur as a means of lowering soil ph (even if at micro sites) is one way to increase the availability of insoluble nutrients/ effectiveness of elemental sulfur in lowering soil ph depends on the activity of sulfur oxidizing bacteria especially, thiobacillus genus/ to evaluate the possibility of partially substituting sulfur along thiobacillus inoculum for phosphorus and micronut...

حاجی علیانی, گلزاده, مستجاب الدعواتی, ، سید مجتبی , نصری نصرآبادی, مهدی,

Geographical features of each region of the world affect the activity concentration of natural radionuclides such as uranium, thorium and potassium. In this study, 26 soil samples were randomly collected from sides of the Dez River and transferred to the Laboratory for preparation. Activity concentration of natural radioactive materials was measured using p-type HPGe detector with a 38% relativ...

2016
Yuguang Zhang Jing Cong Hui Lu Ye Deng Xiao Liu Jizhong Zhou Diqiang Li

Microorganisms play key roles in ecosystem processes and biogeochemical cycling, however, the relationship between soil microbial taxa diversity and their function in natural ecosystems is largely unknown. To determine how soil bacteria community and function are linked from the local to regional scale, we studied soil bacteria community composition, potential function and environmental conditi...

2008
M. F. Ahmed I. R. Kennedy A. T. M. A. Choudhury

Seven Australian soil samples were collected from different locations (Camden, Griffith, Narrabri, Rutherglen, Wagga Wagga, Wee Waa (Ivanhoe), and Yanco) to measure their phosphorus (P) adsorption rates. Soils were collected from the top 0–15 cm, and P was added at 0, 100, 200, 300, 400, and 500 mg P g soil. Results indicated that P adsorption increased significantly with increasing levels of a...

Rahil Khoshrooei Saeid Soltani

Cladophora and Enteromorpha are the filamentous green-algal genuses that have a widespread distribution in Caspian Sea Coast. The aim of this study was to assess the antimicrobial activities of Cladophora and Enteromorpha in South of Caspian Sea. Antibacterial activities of hydroalcoholic extracts of five different gram negative and positive bacteria including Staphylococcus aureus, Bacillus su...

Journal: :Proceedings of the National Academy of Sciences of the United States of America 2016
Zachary Charlop-Powers Clara C Pregitzer Christophe Lemetre Melinda A Ternei Jeffrey Maniko Bradley M Hover Paula Y Calle Krista L McGuire Jeanne Garbarino Helen M Forgione Sarah Charlop-Powers Sean F Brady

Numerous therapeutically relevant small molecules have been identified from the screening of natural products (NPs) produced by environmental bacteria. These discovery efforts have principally focused on culturing bacteria from natural environments rich in biodiversity. We sought to assess the biosynthetic capacity of urban soil environments using a phylogenetic analysis of conserved NP biosynt...

A. Abdollahi A. Tahmourespour I. Amini

Anthracene is a widespread environmental pollutant with carcinogenic and genotoxic properties. Biodegradation is a simple, cost-effective and safe technique to clean-up contaminated environments. The aims of this study are isolation and characterization of an oligotrophic bacterium with the ability to degrade anthracene and the assessment of in vitro biodegradation process. For this purpose pet...

ژورنال: یافته 2013
بختیاری, سالار , حقانی, کریمه , رستم زاد, آرمان , سبزعلی, سمیه ,

Background : Nerium oleander is used to cure several diseases in China and the Arabs, ancient medicine. This study tried to investigate the anti-bacterial activities of the hydroalcoholic extract of Nerium oleander which is native of Ilam province. Materials and Methods: Nerium oleander was collected from the Zagros mountains, Ilam province, Iran. After naming and identification, the plant ext...

2015
Anna K. Simonsen Shery Han Phil Rekret Christine S. Rentschler Katy D. Heath John R. Stinchcombe David Day

Fertilizer application is a common anthropogenic alteration to terrestrial systems. Increased nutrient input can impact soil microbial diversity or function directly through altered soil environments, or indirectly through plant-microbe feedbacks, with potentially important effects on ecologically-important plant-associated mutualists. We investigated the impacts of plant fertilizer, containing...

Journal: :iranian journal of toxicology 0
مهدی حسن شاهیان mehdi hassanshahian department of biology, shahid bahonar university of kerman, kerman, iran.

background: organic agricultural pesticides are so stable in ecosystems and biosphere. these compounds affect soil conditions and agricultural products. the aim of this study was isolation of diazinon-degrading bacteria from kerman pistachio orchards, southeastern iran. methods: diazinon-degrading bacteria were enriched in bushnell-hass medium. identification and sequencing of prevalent degradi...

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