نتایج جستجو برای: ptf
تعداد نتایج: 342 فیلتر نتایج به سال:
A moderately thermophilic (45 to 50 degrees C), highly acidophilic (pH 1.5 to 2.5), chemolithotrophic Acidithiobacillus caldus strain, f, was isolated from a biooxidation process used to treat nickel ore. Trans-alternating field electrophoresis analysis of total DNA from the A. caldus cells revealed two plasmids of approximately 14 and 45 kb. The 14-kb plasmid, designated pTC-F14, was cloned an...
The soil sorption coefficient (Kd) of glyphosate mainly controls its transport and fate in the environment. Laboratory-based analysis Kd is laborious expensive. This study aimed to test feasibility visible near-infrared spectroscopy (vis–NIRS) as an alternative method for estimation at a country scale compare accuracy against pedotransfer function (PTF). A total 439 soils with wide range values...
Hertzian line contact stresses between a rotat ing metal cy l inder and a reciprocating f lat str ip of the bearing material are used in an accelerated wear test described in this paper. The test readi ly demonstrates differences in the wear behaviour between d i f ferent PTF E-based dry bearing materials. For one widely-used woven PTFE f ibre composite, the relat ionships between wear and stre...
Type IIn supernovae potentially constitute a large fraction of the gravitationally lensed predicted to be found with upcoming facilities. However, local rate is used for these estimates, which assumed independent properties such as host galaxy mass. Some studies hint that mass bias may exist supernovae. This paper aims provide an updated supernova-to-core-collapse ratio based on data from Palom...
Antik çağdan beri varlığı bilinen statik elektrik 1880’de New York’ta üretilen ile farklı bir anlam kazanarak insan hayatının vazgeçilmez unsuru olmuştur. Günümüzde, temel ihtiyaç alanına girmiş olan elektriğin üretiminden dağıtımına kadar önceleri devlet tekeliyle gerçekleştirilse de özellikle 1980’lı yıllardan itibaren piyasası serbestleştirilmeye başlanarak rekabetçi yapıya dönüşmesi amaçlan...
Application. The Palomar Transient Factory (PTF) project aims to identify and automatically classify transient astrophysical objects such as variable stars and supernovae in real-time. A list of candidates is extracted from the images taken by the telescope during a night. They are stored as a table in one or more FITS files. The initial stage in the identification process is to execute a serie...
The aim of this case report was to evaluate the potential of preformed titanium foil (PTF) as membrane, used together with a mouldable allograft paste, for guided bone regeneration in a case of severe mandibular posterior atrophy involving the alveolar nerve. In order to create a rigid barrier to the competitive growth of soft tissues and a stable volume for the colonization of the osteoprogeni...
There is a consensus that type Ia supernovae (SNe Ia) arise from the thermonuclear explosion of white dwarf stars that accrete matter from a binary companion. However, direct observation of SN Ia progenitors is lacking, and the precise nature of the binary companion remains uncertain. A temporal series of high-resolution optical spectra of the SN Ia PTF 11kx reveals a complex circumstellar envi...
The pasABC genes of the proteic plasmid addiction system of broad-host-range plasmid pTF-FC2 were autoregulated. The PasA antidote was able to repress the operon 25-fold on its own, and repression was increased to 100-fold when the PasB toxin was also present. Autoregulation appears to be an essential requirement for pas-mediated plasmid stabilization because when the pas genes were placed behi...
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