Studies on pigment donation in tissue culture (1-5) indicate that melanosome transfer is a cytophagic process during which a portion of a melanocyte dendrite is pinched off by the epidermal cell so that melanosomes and melanocyte cytoplasm are incorporated into the keratinocyte. At the ultrastructural level, one would ex-rect to see, at this stage, a cluster of melanosomes embedded in a cytopla...

Many people who suffer from seasonal inhal ant allergy in other sections of the United States, come to Florida to escape from offensive pollens at home, inasmuch as airborne pollen grains are commonly declared to be the princi pal exciting cause of such respiratory afflictions, and change of regional residence has in many cases brought relief (7). However, some vic tims who migrate to South Flo...

Some 3D computer graphics algorithms are using front-to-back scene traversal (for example hidden-line removal algorithms or fast form-factor computation). In such methods each pixel has to be processed at most once. For this purpose various raster set representations can be used. This paper gives a survey of selected data structures for raster set representation. Some new non-symmetrical method...

dis or der af fect ing ap prox i mately 1 in 10,000 male. The dis ease is caused by a de fi ciency of co ag u la tion fac tor VIII (FVIII) re sult ing from mu ta tions in the FVIII gene. Nu cle o tide sub sti tu tions/in ser tions of var i ous sizes have been iden ti fied through out the FVIII gene. This ge netic di ver sity ac counts for the ob served het er o ge ne ity in clin i cal se ver it...

A path-based inheritance logic is proposed for handling nonmonotonic inheritance structures. The formalism is called exceptional inheritance logic (EIL). Exceptional information which is nevertheless inheritable is encapsulated in a class, called an exceptional class. EIL also takes into account a difference between acquired and inheritable properties. The paper describes ways in which exceptio...

A large number of studies on a lkaline phosphatase (AP) of chicken plasma have been made during the past forty years. Most of those studies are on the enzymic activity and the polymorphic studies are relatively few . In most of the polymorphic studies of chicken plasma AP, a starch gel electrophoresis has been employed. Major results by other investigators'"' may be summarized as follows. AP co...

—A new intergeneric hybrid manakin (Dtxiphia pipra x pipra fiiicauda) is described from the Andean foothills of eastern Ecuador. The adult male specimen represents ihe first record of hybridization among species belonging to different clades of the traditional but polyphyletic genus Pipra (Prum 1990, 1992). The collecting locality, Sarayacu (l°44'S. 77°29"W). apparently lies in a narrow zone of...

The current UNIX® text processing tools are weakened by the built-in concept of a line. There is a simple notation that can describe the ‘shape’ of files when the typical array-of-lines picture is inadequate. That notation is regular expressions. Using regular expressions to describe the structure in addition to the contents of files has interesting applications, and yields elegant methods for ...

fibers • In 1907, Keith and Flack 1 desc; rect muscular bundle connecting the and atrio-ventricular nodes a it was "therefore possible ular rhythm to occur in t' Two years later Thorel 2 publish^ communication in which he a direct path between the n the cells constituting this thought to be specialized Purkinje type. Since then, although many studies have been devoted to the subject, the result...

Two-dimensional spatially selective excitation is used to excite a volume such as pencil beam or cylinder-like shape (1). It can also be used to obtain reduced FOV in slice selective excitation, which corresponds to a rectangular stick in the object domain (2). This study is to explore how to design RF and gradient pulses in order to excite a desired volume given gradient limitations, and to se...