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1852. An updated view of leptin on implantation and pregnancy: a review
- Creator:
- Herrid, M., Palanisamy, S. K. A., Ciller, U. A., Fan, R., Moens, P., Smart, N. A., and McFarlane, J. R.
- Format:
- print, bez média, and svazek
- Type:
- article, články, model:article, and TEXT
- Subject:
- Fyziologie člověka a srovnávací fyziologie, leptin, těhotenství, pregnancy, 14, and 612
- Language:
- English
- Description:
- The hormone leptin, which is thought to be primarily produced by adipose tissue, is a polypeptide that was initially characterized by its ability to regulate food intake and energy metabolism. Leptin appears to signal the status of body energy stores to the brain, resulting in the regulation of food intake and whole-body energy expenditure. Subsequently, it was recognized as a cytokine with a wide range of peripheral actions and is involved in the regulation of a number of physiological systems including reproduction. In the fed state, leptin circulates in the plasma in proportion to body adiposity in all species studied to date. However other factors such as sex, age, body mass index (BMI), sex steroids and pregnancy may also affect leptin levels in plasma. In pregnant mice and humans, the placenta is also a major site of leptin expression. Leptin circulates in biological fluids both as free protein and in a form that is bound to the soluble isoform of its receptor or other binding proteins such as one of the immunoglobulin superfamily members Siglec-6 (OBBP1). Although the actions of leptin in the control of reproductive function are thought to be exerted mainly via the hypothalamicpituitary-gonadal axis, there have also been reports of local direct effects of leptin at the peripheral level, however, these data appear contradictory. Therefore, there is a need to summarize the current status of research outcomes and analyze the possible reasons for differing results and thus provide researchers with new insight in designing experiments to investigate leptin effect on reproduction. Most importantly, our recent experimental data suggesting that reproductive performance is improved by decreasing concentrations of peripheral leptin was unexpected and cannot be explained by hypotheses drawn from the experiments of excessive exogenous leptin administration to normal animals or ob/ob mice., M. Herrid, S. K. A. Palanisamy, U. A. Ciller, R. Fan, P. Moens, N. A. Smart, J. R. McFarlane., and Obsahuje bibliografii
- Rights:
- http://creativecommons.org/licenses/by-nc-sa/4.0/ and policy:public
1853. An upper bound for domination number of 5-regular graphs
- Creator:
- Xing, Hua-Ming, Sun, Liang, and Chen, Xue-Gang
- Format:
- bez média and svazek
- Type:
- model:article and TEXT
- Subject:
- domination number, 5-regular graph, and upper bounds
- Language:
- English
- Description:
- Let $G=(V, E)$ be a simple graph. A subset $S\subseteq V$ is a dominating set of $G$, if for any vertex $u\in V-S$, there exists a vertex $v\in S$ such that $uv\in E$. The domination number, denoted by $\gamma (G)$, is the minimum cardinality of a dominating set. In this paper we will prove that if $G$ is a 5-regular graph, then $\gamma (G)\le {5\over 14}n$.
- Rights:
- http://creativecommons.org/publicdomain/mark/1.0/ and policy:public
1854. An upper bound on the basis number of the powers of the complete graphs
- Creator:
- Alsardary, Salar Y.
- Format:
- bez média and svazek
- Type:
- model:article and TEXT
- Subject:
- math and complete graphs
- Language:
- English
- Description:
- The basis number of a graph $G$ is defined by Schmeichel to be the least integer $h$ such that $G$ has an $h$-fold basis for its cycle space. MacLane showed that a graph is planar if and only if its basis number is $\le 2$. Schmeichel proved that the basis number of the complete graph $K_n$ is at most $3$. We generalize the result of Schmeichel by showing that the basis number of the $d$-th power of $K_n$ is at most $2d+1$.
- Rights:
- http://creativecommons.org/publicdomain/mark/1.0/ and policy:public
1855. AN: AB: Antonio Abondio
- Creator:
- Dušková , Kateřina
- Format:
- bez média and svazek
- Type:
- model:article and TEXT
- Language:
- Czech
- Rights:
- http://creativecommons.org/publicdomain/mark/1.0/ and policy:public
1856. Anachronistic attributes in temporal data: a case study
- Creator:
- Nováková, Lenka, Kléma, Jiří, and Štěpánková, Olga
- Format:
- bez média and svazek
- Type:
- model:article and TEXT
- Subject:
- anachronistic variahle, windowing, temporal pattem, and trend analysis
- Language:
- English
- Description:
- The paper concerns mining data lacking the uniform structure. The data are collected from a riumber of objects during repeated measurenients, all of which are tagged by a corresponding time. No attribute-valued machine learning algorithm can be applied directly on such data since the number of measurements is not fixed but it varies. The available data háve to be transformed and preprocessed in such a way that a uniform type of Information is obtained about all the considered objects. This can be achieved, e.g., by aggregation. But this process can introduce anachronistic variables, i.e., variables containing Information which cannot be available at the moment when a prediction is needed. The paper suggests and tests a method how to preprocess the considered type of data without falling into a trap of introducing anachronistic attributes. The method is illustrated on a čase study baaed on STULONG data.
- Rights:
- http://creativecommons.org/publicdomain/mark/1.0/ and policy:public
1857. Anaforický reťazec
- Creator:
- Kosterec, Miloš
- Format:
- bez média and svazek
- Type:
- model:article and TEXT
- Subject:
- anaphora, antecedent, constituent, SUB function, Tr function, anafora, předchůdce, složka, funkce SUB, and funkce Tr
- Language:
- Slovak
- Description:
- This paper deals with the problem of semantic analysis of contexts involving so-called anaphoric chain. The notion of anaphoric chain is explained by way of an example. Afterwards, a semantic analysis of sentences containing anaphora established in Transparent Intensional Logic (TIL) is examined. It is demonstrated that it is not adequate for texts including anaphoric chains. An alternative method using TIL that is capable to deal with all kinds of anaphora is proposed. Anyway, one may raise doubts as to whether both approaches are really analyses of anaphorically used expressions., Článek se zabývá problematikou sémantické analýzy kontextů zahrnujících tzv. Anaforický řetězec . Pojem anaforický řetězec je vysvětlen na příkladu. Následně je zkoumána sémantická analýza vět obsahujících anaforu vytvořených v transparentní intenzivní logice (TIL). Je prokázáno, že není vhodný pro texty obsahující anaforické řetězce. Navrhuje se alternativní metoda používající TIL, která je schopna se vypořádat se všemi druhy anafor. V každém případě lze pochybovat, zda jsou oba přístupy skutečně analýzou anaforicky používaných výrazů., and Miloš Kosterec
- Rights:
- http://creativecommons.org/publicdomain/mark/1.0/ and policy:public
1858. Analitical simulation of application of FFT based spectral method of fatigue cycle counting for multiaxial stress on example of pulse excited beam
- Creator:
- Kozien, Marek Stanisław and Smolarski, Dariusz
- Format:
- bez média and svazek
- Type:
- model:article and TEXT
- Subject:
- fatigue, FFT analysis, vibration, and cycle counting
- Language:
- English
- Description:
- Vibration of engineering structures results in time variable displacements functions. For realistic structures modes of vibration are determined by exciting frequency and the natural frequencies of the structure. Hence, the components of stress tensor are time function too. In the presented paper the general idea of method of cycle-counting based on the FFT analysis for engineering structures is discussed and analytically verified for the case vibrating beam excited by series pulse-type force with no damping. and V názvu článku je jazyková chyba/překlep - analitical - správně = analytical
- Rights:
- http://creativecommons.org/licenses/by-nc-sa/4.0/ and policy:public
1859. Analiz točnosti opredelenija lunno-sol'nečnych vozmuščenij v analitičeskoj teorii dviženija ISZ
- Creator:
- Nasonova, L. P.
- Format:
- bez média and svazek
- Type:
- model:article and TEXT
- Subject:
- analytical theory, luni-solar perturbations, and accuracy
- Language:
- Czech
- Description:
- An analytical method od determination of luni-solat perturbations of the satellite motion is described here. The motion of perturbing body is described by trigonometrical series with the necessary accuracy. The determination of perturbations is made by numerous analytical transformations of the series by means of computer. As a result of these transformations the original accuracy is lost because of the limitation of the number of terms in series. The loss of accuracy is subjected to analysis by means of numerical tests and intotal accuracy of original series is estimated for fixed required accuracy of the calcualtion of satellite coordinates.
- Rights:
- http://creativecommons.org/publicdomain/mark/1.0/ and policy:public
1860. Analiz vlijanij negravitacionnogo charaktera na dviženije ISZ
- Creator:
- Georgiev, N. and Koceva, V.
- Format:
- bez média and svazek
- Type:
- model:article and TEXT
- Subject:
- satellite motion and non-gravitational effects
- Language:
- Czech
- Description:
- The effects of some non-gravitational perturbations on the intermediate coordinates *, *, * of the artificial earth´s satellites were investigated. The analytical theory used is based on the asymmetrical method of two fixed centres and powers of regularized time *. and Použity 4x * na místě nesrozumitelných (ručně psaných) znaků
- Rights:
- http://creativecommons.org/publicdomain/mark/1.0/ and policy:public