We present a high precision Monte Carlo study of the spectrum of the Z 2 gauge theory in 2 + 1 dimensions in the strong coupling phase. Using state of the art Monte Carlo techniques we are able to accurately determine up to three masses in a single channel. We compare our results with the strong coupling expansion for the lightest mass and with results for the universal ratio σ/m 2 determined f...

We study superstrings with orientifold projections and with generalized open string boundary conditions (D-branes). We find two types of consistency condition, one related to the algebra of Chan-Paton factors and the other to cancellation of divergences. One consequence is that the Dirichlet 5-branes of the Type I theory carry a symplectic gauge group, as required by string duality. As another ...

Sphingolipid activator proteins (SAPs) are small, nonenzymic glycoproteins that stimulate lysosomal degradation of various sphingolipids. SAP-1, SAP-2, and two additional potential activator proteins are derived from a common precursor by proteolytic processing. A severe case of sphingolipid storage disease that led to death within 16 weeks was attributed to a possible total deficiency of the S...

CYSTS of Krause's glands usually occur as retention cysts in cicatricial conditions of the conjunctiva such as trachoma, or pemphigus (Stoewer, 1892; Thompson and Chatterton, 1905; Contino, 1960; Caocci, 1932) or after the scar caused by excision of chalazion (Paton, 1919). Giri (1936) and Butler (1907) reported cases wherein no conjunctival scarring was evident. The cysts occur in the upper fo...

We find the orbifold analog of the topological relation recently found by Freed and Witten which restricts the allowed D-brane configurations of Type II vacua with a topologically non-trivial flat B-field. The result relies in Douglas proposal – which we derive from worldsheet consistency conditions – of embedding projective representations on open string Chan-Paton factors when considering orb...

For the six gluon scattering process we give explicit and simple expressions for the amplitude and its square. To achieve this we use an analogy with string theories to identify a unique procedure for writing the multi-gluon scattering amplitudes in terms of a sum of gauge invariant dual sub-amplitudes multiplied by an appropriate color (Chan-Paton) factor. The sub-amplitudes defined in this wa...

Introduction. The extent and causes of variation in sporophyte production among British dioicous liverworts are assessed.Methods. Reproductive attributes species taken from Paton’s Liverwort Flora the Isles (1999 Paton JA. 1999. liverwort flora Isles. Colchester: Harley Books. [Google Scholar]). to which is potentially restricted by low levels sex expression, unbalanced phenotypic ratios, proba...

GANGLIONIC blockade was first used to produce controlled hypotension during surgery by Scurr (1951). This technique has since become generally accepted in anaesthetic practice. Ganglion blocking drugs now available include the methonium compounds and the short acting agents trimetaphan and homatropinium (Trophenium). There is no doubt that these drugs act selectively on the sympathetic ganglia,...

We examined the range and the relationships of Marbled Murrelet (Brachyramphus marmoratus) behavior with habitat and landscape characteristics in isolated old-growth and residual forest stands from 2 to 400 ha in California. In large contiguous stands of old-growth forest in parks, we examined relationships of murrelet detections with elevation and topography. In isolated stands we found higher...

Cytochalasin B, a fungal metabolite, has been shown to inhibit hexose transport in a variety of cellular types, including erythrocytes (Bloch, 1973), leucocytes (Zigmond & Hirsch, 1972), adipose-cell ‘ghosts’ (Czech et al., 1973), fibroblasts and liver cells (Kletzien et al., 1972) and HeLa cells (Mitzel & Wilson, 1972). Studies of effects of cytochalasin B on hexose transport in the nervous sy...