Graphs without induced subgraphs of minimum degree at least 3 have been considered in matroid theory (see, e.g., Welsh 1976, ch. 14 or Aigner 1979, ch. 7) and in some domains of applications (Todd 1989, Gu enoche and Leclerc 1999). Maximal such graphs were characterized in Todd's paper. They are called here 2d-trees. A subclass of 2d-trees consists of the classical 2-trees (Pippert and Beineke ...

We introduce an abstract concept for decomposing spaces with respect to a substructuring of a bounded domain. In this setting we define weakly conforming finite element approximations of quadratic minimization problems. Within a saddle point approach the reduction to symmetric positive Schur complement systems on the skeleton is analyzed. Applications include weakly conforming variants of least...

CO L L E G E L I B R A R I A N S c a n n o t d e p e n d u p o n p r o f e s s i o n a l l i b r a r y l i t e r a t u r e a l o n e f o r b u i l d i n g u p t h e i r b o o k c o l l e c t i o n s . T h e f a c u l t i e s o f c o l l e g e s a n d u n i v e r s i t i e s p l a y a n i m p o r t a n t r o l e i n t h e s e l e c t i o n o f b o o k s f o r t h e c o l l e g e l i b r a r y a ...

Freeze dried powdered leaves of Cymbopogum citratus (DC) Stapf, Cinnamomum camphor a (L.) Nee & Eberm Ipomoea mauritiana Jacq. famarandus indicus L., Lantana camara L., Myroxylon balsumum (L.) Harm, Citrus aurantium L. and vitex altisima L. were tested against Callosobruchus maculatus under nochoice and choice situations. Under no-choice situation, V. altisima at the rate of 5.0% w/w was highly...

accurate and nondestructive methods to determine individual leaf areas of plants are useful tools in physiological and agronomic research. a determination of the individual leaf area (la) of such species in brassicaceae family as red cabbage (brassica oleracea var. cappitata l. f. rabra), cabbage (brassica oleracea var. cappitata l. f. alba) and broccoli (brassica oleracea var. italica l.) ...

Records from a colubrid host are reported for Hepatozoon horridus, described originally from a viperid snake. Hepatozoon horridus in Pantherophis guttatus (Colubridae) has gamonts 14-18.0 by 4.0-5.5 microm, with length by width (LW) 60-99 microm2, and L/W ratio 2.5-3.9. Spherical to elongate, usually ovoid oocysts with L/W ratio 1.0-3.7 contain 16-160 spherical to usually ovoid sporocysts 15-31...

L-asparaginase (L-asparagine amido hydrolase, E.C.3.5.1.1) is a promising chemotherapeutic agent which plays a vital role in treatment of a variety of lymphoproliferative disorders, lymphosarcoma and acute lymphoblastic leukemia in particular. An attempt is made in the present study to optimize the production of L-asparaginase by Fusarium equiseti using soya bean meal under solid state fermenta...

3 W. L. Russell, L. B. Russell, and E. F. Oakberg, in Radiation Biology and Medicine, ed. W. D. Claus (Reading, Mass.: Addison-Wesley Publishing Co., Inc., 1958), chap. viii. 4 W. L. Russell, L. B. Russell, and E. M. Kelly, Science (in press). 5 E. F. Oakberg, Proc. Tenth Intern. Congr. Genetics, 2, 207, 1958. 6 W. L. Russell, L. B. Russell, J. S. Gower, and S. C. Maddux, these PROCEEDINGS, 44,...

(Py,w;i ∈ N, u is an indeterminate) were defined and computed in terms of an algorithm for any y ≤ w in W . These polynomials are of interest for the representation theory of complex reductive groups, see [6]. Let I = {w ∈ W ;w2 = 1} be the set of involutions in W . In this paper we introduce some new polynomials P σ y,w = ∑ i≥0 P σ y,w;iu i (P σ y,w;i ∈ Z) for any pair y ≤ w of elements of I. ...