This study aimed to investigate whether there is any significant relationship between the readability and vocabulary profile including the most frequent words (K1 words) and academic word list (AWL) of reading passages of Four Corners series which were EFL textbooks. To determine the readability of the texts, the Flesch–Kincaid (1975) readability test was used, while the texts' academic word li...

This study aimed to investigate whether there is any significant relationship between the readability and vocabulary profile including the most frequent words (K1 words) and academic word list (AWL) of reading passages of Four Corners series which were EFL textbooks. To determine the readability of the texts, the Flesch–Kincaid (1975) readability test was used, while the texts' academic word li...

One of the most basic questions in knot theory remains unresolved: is crossing number additive under connected sum? In other words, does the equality c(K1♯K2) = c(K1) + c(K2) always hold, where c(K) denotes the crossing number of a knot K and K1♯K2 is the connected sum of two (oriented) knots K1 and K2? The inequality c(K1♯K2) ≤ c(K1) + c(K2) is trivial, but very little more is known in general...

In the crude extracts of bark and leaves Sclerocarya birrea, have been characterized sterols, triterpenes, saponosides, tannins, anthocyanosides, coumarins, reducing compounds, alkaloids carotenoids. Tests were carried out in vitro with from each part plant to assess their efficacy against strains Plasmodium falciparum sensitive chloroquine K1 that resistant 3D7. The alkaloidal gave IC50 = 2.54...

We give a direct generating function construction for cycles of combinatorial structures. Let A be a class of combinatorial structures, with A(z) its corresponding ordinary generating function: A(z) = P 2A z jj. We use corresponding letters for classes and generating functions. Consider the class C whose elements are cycles of elements of A. The following result is classical 6], 1]: C(z) = X k1...

N. V. Efimov [Efi64] proved that there is no complete, smooth surface in R with uniformly negative curvature. We extend this to isometric immersions in a 3-manifold with pinched curvature: if M has sectional curvature between two constants K2 and K3, then there exists K1 < min(K2, 0) such that M contains no smooth, complete immersed surface with curvature below K1. Optimal values of K1 are dete...

background: radio-adaptive response and bystander effects are known phenomena occurring in cells following exposure to ionizing radiation (ir). in this study we examined possible radio-adaptation of lymphocytes following bystander effects induced by cho-k1 cells. materials and methods: whole blood and cho-k1 cells were cultured in rpmi-1640 complete medium. cells were separately irradiated with...

Let G and E stand for one of the following pairs of groups: • Either G is the general quadratic group U(2n, R,Λ), n ≥ 3, and E its elementary subgroup EU(2n, R,Λ), for an almost commutative form ring (R,Λ), • or G is the Chevalley group G(Φ, R) of type Φ, and E its elementary subgroup E(Φ, R), where Φ is a reduced irreducible root system of rank ≥ 2 and R is commutative. Using Bak’s localizatio...

By the works of Levine [2] and Rolfsen [5], [6], it is known that a local move called a crossing-change is strongly related to the Alexander invariant. In this note, we will consider to what degree the relationship is strong. Let K be a knot, and K the set of knots obtained from a knot K by a single crossing-change. Let MK be the Alexander invariant of a knot K, and MK the set of the Alexander ...

Vitamin K is required for the hepatic production of blood coagulation factors II, VII, IX and X. The term vitamin K refers to a variety of fat-soluble 2-methyl-1, 4-naphthoquinone derivatives. Vitamin K1 (phylloquinone) occurs in green plants, while vitamin K2 (menaquinone) is synthesized by microbial in the gut. The recommended dose of vitamin K in neonates is 1 mg intramuscularly. For infants...