Human blood platelets contain two proteins very similar in structure and function to the contractile proteins of muscle: actin and myosin. Platelet actin has a similar molecular weight (43 000 daltons) and amino acid composition to muscle actin. It polymerizes into long filaments which can form ‘arrowheads’ with skeletal muscle and platelet myosin subfragment-1 (S-1) as viewed in the electron m...

Experiments from the periodic and aperiodic traditions were used to guide the development of a quantitatively valid model of light adaptation dynamics. Temporal contrast sensitivity data were collected over a range of 3 log units of mean luminance for sinusoids of 2 to 50 Hz. Probe thresholds on flashed backgrounds were collected over a range of stimulus-onset asynchronies and background intens...

Deduction chains represent a syntactic and in a certain sense constructive method for proving completeness of a formal system. Given a formula φ, the deduction chains of φ are built up by systematically decomposing φ into its subformulae. In the case where φ is a valid formula, the decomposition yields a (usually cut-free) proof of φ. If φ is not valid, the decomposition produces a countermodel...

Oh, Deborah M., Joshua M. Kim, Raymond E. Garcia, and Beverly L. Krilowicz. Valid and reliable authentic assessment of culminating student performance in the biomedical sciences. Adv Physiol Educ 29: 83–93, 2005; doi:10.1152/advan.00039.2004.—There is increasing pressure, both from institutions central to the national scientific mission and from regional and national accrediting agencies, on na...

surah al-`adiyat is one of the controversial surahs as to whether it is a meccan or a medinan surah. if we determine the place of revelation, it can help us in better interpreting and understanding of surah. because of the oaths in the opening lines of this surah, some commentators believe that it concerns jihad which became obligatory in medina. there are also narratives that date the revelati...

In this paper we introduce unconditionally secure distributed delegation systems that allow groups of participants to collectively authorize a delegate to sign a message (construct an authentic message) on their behalf. We propose a model and investigate its properties when delegation is valid for one transmission. The model is extended to multiple delegation and constructions with more economi...

Human hexosaminidases A and B were purified from placentae, using two stages of affinity chromatography, to a high degree of purity. Each enzyme was purified 5000-6000-fold, and isolated in 25-40% yield. Enzyme preparations appeared homogeneous in the analytical ultracentrifuge and by acrylamide gel electrophoresis. Hexosaminidase A contained 1.65 residues of sialic acid per molecule, whereas n...


 The purpose of this research is to find out the difference between kutubusittah and kutubutis'ah. Kutubusittah six books hadith which are master hadith, namely Sahih Bukhari, Muslim, Sunan Abu Dawud, At-Tarmizi, An-Nasa'I Ibn Mazah, while kutubutis'ah in plus Al-Muwatha' by Imam Malik, These a form rapid development science third century hijriyah, with existence kutubutis'ah, traditions ...