نتایج جستجو برای: جهش chatham

تعداد نتایج: 3463  

Journal: :international journal of environmental research 2015
s. deepa t. sathish n. v. vinithkumar v. p limna mol r. kirubagaran

flora and fauna of rocky coastal habitats are versatile in adapting to the prevalent tidal fluctuations. the current study was undertaken to evaluate the diversity of fouling and associated species around the port blair coastal areas of andaman and nicobar islands. except tss, the hydrographical parameters (temperature, salinity, ph and dissolved oxygen) did not significantly vary among the 5 s...

ایمانی, ویدا, شمس, کریم, صناعت, زهره, مقدس زاده, مجید, موثق پور, علی اکبر, نجاتی, بابک,

زمینه و هدف : لوسمی حاد میلوییدی یک بیماری بدخیم بافت خونساز است که با تجمع سلول‌های غیرطبیعی و تمایزنیافته به‌نام سلول‌های بلاستیک میلوئیدی در مغز استخوان و اختلال تولید سلول‌های طبیعی خونی مشخص می‌شود. این مطالعه به منظور تعیین جهش ژنی FLT3 و NPM1 و یافته‌های آزمایشگاهی در بیماران مبتلا به لوسمی حاد میلوییدی در شمال غرب ایران انجام شد. روش بررسی : این مطالعه توصیفی - تحلیلی روی 40 بیمار (24 ...

2016
Jessie Hughes Brian Meyer Daniel Deocampo Katie Price Sarah Ross

A detailed record of the Late Holocene sea level rise and landscape evolution that has taken place on the Georgia coast is contained within the sedimentary stratigraphy of its salt marsh depositional basins. Global relative sea level (RSL) has risen during the Late Holocene, and the rate of rise has accelerated during the Anthropocene. Jones Narrows marsh stratigraphy and radiocarbon analysis i...

2017
Chris Mays David J. Cantrill Joseph J. Bevitt

Several highly effective fire-adaptive traits first evolved among modern plants during the mid-Cretaceous, in response to the widespread wildfires promoted by anomalously high atmospheric oxygen (O2) and extreme temperatures. Serotiny, or long-term canopy seed storage, is a fire-adaptive strategy common among plants living in fire-prone areas today, but evidence of this strategy has been lackin...

2017
Charles Clift David M. Salisbury

Interest in addressing antimicrobial resistance (AMR) has grown recently but little effort has been made to consider how existing and new vaccines could impact on AMR. A 2017 Chatham House meeting considered the role of vaccines and how to demonstrate their value through their impact on AMR. Ways existing vaccines have reduced antibiotic prescribing and the prevalence of some resistant organism...

2006
John M. Kean Brian McArdle

The Kean–Barlow model predicts how the equilibrium distribution and abundance of a population may be affected by local rates of increase, dispersal, colonisation, and extinction. Here, the model is parameterised for three insects: the Glanville fritillary Melitaea cinxia in Åland, Finland, the ribbonwood aphid Paradoxaphis plagianthi in Christchurch, New Zealand, and the coxella weevil Hadramph...

2007
Curtis Eberwein John C. Ham Donghoon Lee Holger Sieg

This paper shows how to recursively calculate analytic first and second derivatives of the likelihood function generated by a popular version of a discrete-choice, dynamic programming model, allowing for a dramatic decrease in computing time used by derivative-based estimation algorithms. The derivatives also are very useful for finding the exact maximum of the likelihood function, for de-buggi...

2013
Rodney J. Lewington Peter Beveridge Matt A. M. Renner

Lejeunea hodgsoniana Grolle ex R.J.Lewington, P.Beveridge & M.A.M.Renner sp. nov., A taxon originally recognised by Riclef Grolle in 1980, but not described, known from a number of coastal sites in the North Island, the northern extremity of the South Island, the Kermadec Islands, and the Chatham Islands of New Zealand, is described and illustrated. The species is distinctive amongst species of...

Journal: :New Zealand Journal of Marine and Freshwater Research 2023

The Subtropical Front (STF) and associated biological productivity are topographically locked to the Chatham Rise. Year-to-year differences of upper ocean dynamics responses phytoplankton valuable for understanding variability in fisheries biomass as well providing new knowledge environmental condition potential seabed mining this keystone ecosystem. In-situ observations collected over three co...

اصغر حیدری, لاله نراقی نادر حسن زاده هانیه جهانی فر

در این تحقیق با استفاده از پدیده جهش خود به خودی(Spontaneous mutation) سه جهش یافته مقاوم به دو آنتی بیوتیک (Nalidixic acid (Nal  و Rifampicin (Rif)  از شش جدایه باکتری Pseudomonas fluorescens ،تهیه گردید و در مقایسه با انواع وحشی آنها در شرایط آزمایشگاه بر علیه قارچ بیماریزایRhizoctonia solaniعامل بیماری مرگ گیاهچه پنبه از طریق روش آزمون کشت متقابل (Dual culture)مورد بررسی قرار گرفت. نتایج نشا...

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