Newly discovered Synechococcus sp. PCC 11901 is a robust cyanobacterial strain for high biomass production.

Cyanobacteria, which use solar energy to convert carbon dioxide into biomass, are potential solar biorefineries for the sustainable production of chemicals and biofuels. However, yields obtained with current strains are still uncompetitive compared to existing heterotrophic production systems. Here we report the discovery and characterization of a new cyanobacterial strain, Synechococcus sp. PCC 11901, with promising features for green biotechnology. It is naturally transformable, has a short doubling time of ≈2 hours, grows at high light intensities and in a wide range of salinities and accumulates up to ≈33 g dry cell weight per litre when cultured in a shake-flask system using a modified growth medium - 1.7 to 3 times more than other strains tested under similar conditions. As a proof of principle, PCC 11901 engineered to produce free fatty acids yielded over 6 mM (1.5 g L-1), an amount comparable to that achieved by similarly engineered heterotrophic organisms

Biochemical Neutralization of Coke Excess Sewage Sludge During Anaerobic Digestion Process

The paper presents the results of the study concerning the production of biogas, thermal energy gain and changes of physical-chemical properties during the process of anaerobic digestion of the municipal sewage sludge amended with coke sewage sludge. The control sample (K) consisted of primary, excessive, and digested sewage sludge (municipal sewage sludge). Another sample consisted of sample (K) and coke sewage sludge (20:1 v/v). The total volume of biogas was equal to 0.62 L g–1TS and 0.56 L g–1TS during the anaerobic digestion of the municipal sewage sludge and during the digestion of the mixture of the municipal sludge and the coke sewage sludge, respectively. The gain of the thermal energy of methane was 40 % during the digestion process. The percentage of decomposition of the organic substance was similar in municipal sewage sludge and in the mixture of municipal sewage sludge amended with coke sewage sludge

Socio-Psychological Determinants of Physical Fitness and a Value System of a Reference Group Based on the Case of the Polish Handball Federation's Referees

Abstract This paper deals with determinants of physical fitness and of a value system of the Polish Handball Federation's [Polski Związek Piłki Rę -cznej] referees (N=6

Inelaticity in hadron-nucleus collisions from emulsion chamber studies

The inelasticity of hadron-carbon nucleus collisions in the energy region exceeding 100 TeV is estimated from the carbon-emulsion chamber data at Pamirs to be $= 0.65\pm 0.08$. When combined with the recently presented data on hadron-lead nucleus collisions taken at the same energy range it results in the $K\sim A^{0.086}$ mass number dependence of inelasticity. The evaluated partial inelasticity for secondary ($\nu > 1$) interactions, $K_{\nu >1} \simeq 0.2$, suggests that the second and higher interactions of the excited hadron inside the nucleus proceed with only slight energy losses.Comment: LaTeX file and 5 LaTeX files with figures, 11 pages altogether. Thoroughly rewritten and modified, one figure addded one removed. To be published in Phys. Rev.

Thin silica films on Ru(0001): monolayer, bilayer and three-dimensional networks of [SiO₄] tetrahedra

The atomic structure of thin silica films grown over a Ru(0001) substrate was studied by X-ray photoelectron spectroscopy, infrared reflection absorption spectroscopy, low energy electron diffraction, helium ion scattering spectroscopy, CO temperature programmed desorption, and scanning tunneling microscopy in combination with density functional theory calculations. The films were prepared by Si vapor deposition and subsequent oxidation at high temperatures. The silica film first grows as a monolayer of corner-sharing [SiO4] tetrahedra strongly bonded to the Ru(0001) surface through the Si–O–Ru linkages. At increasing amounts of Si, the film forms a bilayer of corner-sharing [SiO4] tetrahedra which is weakly bonded to Ru(0001). The bilayer film can be grown in either the crystalline or vitreous state, or both coexisting. Further increasing the film thickness leads to the formation of vitreous silica exhibiting a three-dimensional network of [SiO4]. The principal structure of the films can be monitored by infrared spectroscopy, as each structure shows a characteristic vibrational band, i.e., [similar]1135 cm-1 for a monolayer film, [similar]1300 cm⁻-1 for the bilayer structures, and [similar]1250 cm⁻-1 for the bulk-like vitreous silica

On stationary points of nonexpansive set-valued mappings

In this paper we deal with stationary points (also known as endpoints) of nonexpansive set-valued mappings and show that the existence of such points under certain conditions follows as a consequence of the existence of approximate stationary sequences. In particular we provide abstract extensions of well-known fixed point theorems.Dirección General de Enseñanza SuperiorJunta de Andalucí

EEG Correlates of Attention Concentration in Successful Amateur Boxers

Parameters of EEG activities that could be related to a better attention concentration were compared in two groups of young men, one of which included adequately coached amateur boxers and another consisted of students that were not involved in boxing. The EEG signals were registered from the Cz point in accordance with the 10-20 system; the theta/beta and theta/sensorimotor rhythm (SMR) ratios proved to be especially important for purposes of analysis. Research media included a FlexComp Infinity coder and an EEG-Z sensor with an automatic impedance function. The results were evaluated by means of BioGraph Infinity. The obtained results allow us to conclude that adequately coached amateur boxers who are successful achieve lower theta/beta ratio and theta/SMR ratios than control group students not involved in boxing. One can suggest this is due to the better attention concentration in the boxers (despite posible head injuries) compared to the control group.Ми порівнювали показники ЕЕГ-активності, які могли мати відношення до кращої концентрації уваги, в двох групах молодих чоловіків. Одна з груп складалася з боксерівлюбителів із високими спортивними показниками, а друга – із студентів-спортсменів, які не займалися боксом. ЕЕГсигнали відводилися від локусу Cz (відповідно системі 10–20); особливу увагу при аналізі приділяли відношенням потужностей тета/бета та тета/сенсомоторного (СМР) ритмів. До комплексу апаратури входили кодер FlexComp Infinity та сенсор EEG-Z із функцією автоматичного контролю імпедансу. Результати оцінювали за допомогою програми „BioGrapf Infinity”. Отримані результати дозволяють дійти висновку, що в адекватно тренованих боксерів-любителів (котрі досягали високих результатів на змаганнях) значення відношень тета/бета та тета/СМР у середньому є вищими, ніж такі у студентів з іншою спортивною спеціалізацією (група контролю). Незважаючи на можливі наслідки неминучих травм голови, для студентів-боксерів, вірогідно, є характерною краща концентрація сенсомоторної уваги, ніж для суб’єктів групи контролю

New generalized fuzzy metrics and fixed point theorem in fuzzy metric space

In this paper, in fuzzy metric spaces (in the sense of Kramosil and Michalek (Kibernetika 11:336-344, 1957)) we introduce the concept of a generalized fuzzy metric which is the extension of a fuzzy metric. First, inspired by the ideas of Grabiec (Fuzzy Sets Syst. 125:385-389, 1989), we define a new G-contraction of Banach type with respect to this generalized fuzzy metric, which is a generalization of the contraction of Banach type (introduced by M Grabiec). Next, inspired by the ideas of Gregori and Sapena (Fuzzy Sets Syst. 125:245-252, 2002), we define a new GV-contraction of Banach type with respect to this generalized fuzzy metric, which is a generalization of the contraction of Banach type (introduced by V Gregori and A Sapena). Moreover, we provide the condition guaranteeing the existence of a fixed point for these single-valued contractions. Next, we show that the generalized pseudodistance J:X×X→[0,∞) (introduced by Włodarczyk and Plebaniak (Appl. Math. Lett. 24:325-328, 2011)) may generate some generalized fuzzy metric NJ on X. The paper includes also the comparison of our results with those existing in the literature

Hamiltonian Cycle Parameterized by Treedepth in Single Exponential Time and Polynomial Space

For many algorithmic problems on graphs of treewidth $t$, a standard dynamic programming approach gives an algorithm with time and space complexity $2^{\mathcal{O}(t)}\cdot n^{\mathcal{O}(1)}$. It turns out that when one considers the more restrictive parameter treedepth, it is often the case that a variation of this technique can be used to reduce the space complexity to polynomial, while retaining time complexity of the form $2^{\mathcal{O}(d)}\cdot n^{\mathcal{O}(1)}$, where $d$ is the treedepth. This transfer of methodology is, however, far from automatic. For instance, for problems with connectivity constraints, standard dynamic programming techniques give algorithms with time and space complexity $2^{\mathcal{O}(t\log t)}\cdot n^{\mathcal{O}(1)}$ on graphs of treewidth $t$, but it is not clear how to convert them into time-efficient polynomial space algorithms for graphs of low treedepth. Cygan et al. (FOCS'11) introduced the Cut&Count technique and showed that a certain class of problems with connectivity constraints can be solved in time and space complexity $2^{\mathcal{O}(t)}\cdot n^{\mathcal{O}(1)}$. Recently, Hegerfeld and Kratsch (STACS'20) showed that, for some of those problems, the Cut&Count technique can be also applied in the setting of treedepth, and it gives algorithms with running time $2^{\mathcal{O}(d)}\cdot n^{\mathcal{O}(1)}$ and polynomial space usage. However, a number of important problems eluded such a treatment, with the most prominent examples being Hamiltonian Cycle and Longest Path. In this paper we clarify the situation by showing that Hamiltonian Cycle, Hamiltonian Path, Long Cycle, Long Path, and Min Cycle Cover all admit $5^d\cdot n^{\mathcal{O}(1)}$-time and polynomial space algorithms on graphs of treedepth $d$. The algorithms are randomized Monte Carlo with only false negatives.Comment: Presented at WG2020. 20 pages, 2 figure

On the possible space-time fractality of the emitting source

Using simple space-time implementation of the random cascade model we investigate numerically a conjecture made some time ago which was joining the intermittent behaviour of spectra of emitted particles with the possible fractal structure of the emitting source. We demonstrate that such details are seen, as expected, in the Bose-Einstein correlations between identical particles. \\Comment: Thoroughly rewritten and modify version, to be published in Phys. Rev.