In this study the ability of Acidithiobacillus ferrooxidans, with regard to the biorecovery of heavy metals inshake flask has been investigated. Adaptation experiments with the single metal ions Ni, Co, V, Mo, W anda mixture of the first four metal ions in the medium was developed through serial sub-culturing. Adaptationshowed that A. ferrooxidans could tolerate up to 2.3 g/l ...

Given a string S = a1a2a3 · · · an, the longest increasing subsequence (LIS) problem is to find a subsequence of S such that the subsequence is increasing and its length is maximal. In this paper, we propose and solve two variants of the LIS problem. The first one is the minimal height LIS where the height means the difference between the greatest and smallest elements. We propose an algorithm ...

A rollercoaster is a sequence of real numbers for which every maximal contiguous subsequence, that is increasing or decreasing, has length at least three. By translating this sequence to a set of points in the plane, a rollercoaster can be defined as a polygonal path for which every maximal sub-path, with positiveor negative-slope edges, has at least three points. Given a sequence of distinct r...

The over-all reaction yielding tbymidine diphospho (TDP)6-deoxy-L-talose was first established using crude enzyme preparations catalyzing Reactions 1,2, and 3. Unambiguous proof for the formation of the L isomer of 6-deoxytalose was provided by radioisotope dilution experiments. Purification of sonic extracts of E. coli 045 into fractions catalyzing individual steps of the above scheme revealed...

This paper is concerned with certain connections between the ensemble of n × n unitary matrices—specifically the characteristic function of the random variable tr(U)—and combinatorics—specifically Ulam’s problem concerning the distribution of the length of the longest increasing subsequence in permutation groups—and the appearance of Painlevé functions in the answers to apparently unrelated que...

The interplay between two-dimensional percolation growth models and one-dimensional particle processes has been a fruitful source of interesting mathematical phenomena. In this paper we develop a connection between the construction of Busemann functions in the Hammersley last-passage percolation model with i.i.d. random weights, and the existence, ergodicity and uniqueness of equilibrium (or ti...

Enzymatic reactions involved in the O-34 antigen formation of group E3 Salmonella carrying phages cl3 and ea4 was studied in vitro by the use of cells defective in UDP-glucose4-epimerase activity. Incorporation of glucose from UDPglucose into O-34 antigen required polymerization of mannosylrhamnosylgalactose repeating units. A single trisaccharide unit was not an acceptor for O-34 glucose. A pr...

Nucleosomes and oligonucleosomes were prepared by digestion of human placental nuclei with staphlococccal nuclease and fractionated by gel filtration chromatography. The effect of increasing salt on the structure of nucleosomes was examined in the presence and absence of 10 mM MgCl-. Nucleosomes and oligonucleosomes are insoluble over a broad range of salt concentration. Nucleosomes are soluble...

the new device made in this study could calculate the proper position of tillage tools relative to the land surface at each point, and hydraulic operator set its optimum position. the optimum position of tools is calculated by depth control software developed for this device, and its input data were depth for root development. the performance of device was tested on subsoiler for precision till...