LSI78Y mouse lymphoblastic leukemia cells normally require asparagine (ASN) for growth, but phenotypically stable ASN-independent cells are detectable at low fre quency by direct cloning, in ASN-free soft-agar medium, of cells from cultures that have been grown nonselectively in medium containing ASN. The rate of mutation in vitro to ASN independence was determined by the Luria-Delbruck fluctua...

Cultured hepatocytes from adult Fischer 344 rats were transformed by virion or cloned simian virus 40 (SV40) DNA using the calcium phosphate method. Transformation by SV40 occurred in either serumsupplemented medium or chemically defined medium (COM). The fre quency was greatest in serum-supplemented medium but transformants did not remain differentiated. In contrast, SV40 transformants develop...

Cultured hepatocytes from adult Fischer 344 rats were transformed by virion or cloned simian virus 40 (SV40) DNA using the calcium phosphate method. Transformation by SV40 occurred in either serumsupplemented medium or chemically defined medium (COM). The fre quency was greatest in serum-supplemented medium but transformants did not remain differentiated. In contrast, SV40 transformants develop...

MICROWAVE signal sources of high fre quency-stability and spectral purity are increasingly important to many fields. These include doppler systems, nuclear spectroscopy measurements, spectrum analyzers, as well as telemetry, radio astronomy, and other com munications-type work. All of these applica tions are characterized by the need for good shortand long-term stability as well as low residual...

We study a problem coming from the design of wireless cellular radio communication network Frequency planning constraints are modelled in terms of graph theory For each planning function f let us call sp f or the span of the fre quency planning f the di erence between the largest and the smallest frequency used Let the Order of the graph be Or G sp G and the maximal local order of the graph the...

Background: Although the new treatment methods developed in recent years are aiming to minimize need for cooperation of patients; however, latter still important factor treatment. The aim study was evaluate level Class III maloc-clusion patients with orthodontic Materials and methods: This followed a cross-sectional style; targeted population malocclusion who were treated three different types ...

In this study, postgraduate theses related to Iznik in the database of Higher Education Institution's National Thesis Center (YÖKTEZ) were evaluated within framework various parameters. context, aim study is reveal general features written about Iznik, which candidate process UNESCO World Heritage List, and determine studies. The pa-rameters determined are type thesis, year thesis was published...

When compared to the over-simplified classical skin-effect model, the accurate classical relaxation-effect modelling approach for THz structures at room temperature can be mathematically cumbersome and not insightful. This paper introduces various interrelated electrical engineering concepts as tools for characterizing the intrinsic frequency dispersive nature of normal metals at room temperatu...

Computing frequent itemsets is one of the most prominent problems in data min-ing. We study the following related problem, called FREQSAT, in depth: given someitemset-interval pairs, does there exist a database such that for every pair the fre-quency of the itemset falls into the interval? This problem is shown to be NP-complete. The problem is then further extended to inclu...