0 → Ker f1 → Ker f2 → Ker f3 → Coker f1 → Coker f2 → Coker f3 → 0, where f = (f1, f2, f3) is a suitable homomorphism between short exact sequences in A? This question is an instance of a more general problem. Let D(A) be the derived bounded category of A. We ignore the possible set-theoretic difficulties mentioned in [5, §2.2], because in what we intend to do with D(A) here they do not play any...

Catherine Coker, Wyoma vanDuinkerken, and Stephen Bales are Assistant Professors at Texas A & M University Libraries; e-mail: [email protected], [email protected], [email protected]. edu. © Catherine Coker, Wyoma vanDuinkerken, and Stephen Bales Tenure status for library faculty in the academic environment is coming under increasing attack from administration, faculty members in ot...

Biotechnology has almost unlimited potential to change our lives in very exciting ways. Many of the chemical reactions that produce these products can be fully optimized by performing them at extremes of temperature, pressure, salinity, and pH for efficient and cost-effective outcomes. Fortunately, there are many organisms (extremophiles) that thrive in extreme environments found in nature and ...

Sensitivity and host efficiency of susceptible ('Lee 68', 'Coker 156') and resistant ('Bragg', 'Centennial', 'Forrest', 'Lee 74') soybean (Glycine max (L.) Merr.) cultivars for races of Meloidogyne incognita (Mi) were determined in greenhouse experiments. Eight Mi populations collected from the southeastern United States were utilized. All Mi races reproduced readily on Lee 68 and Lee 74 and mo...

Twenty-six susceptible and resistant soybean, Glycine max, cultivars in Maturity Groups V, VI, VII, and VIII were compared with Coker 156, Wright, and PI97100 for tolerance to Heterodera glycines races 3 and 14. Seed yields were compared in nematicide-treated (EDB, fenamiphos) and untreated plots at two H. glycines-infested locations over 3 years. Coker 488, DP 417, and NK S72-60 had the highes...

Field studies were performed during 2005 and 2006 to determine bollworm, Helicoverpa zea (Boddie), and tobacco budworm, Heliothis virescens (F.), larval behavior on conventional non-transgenic cotton plants (Coker 312), and on transgenic Bacillus thuringiensis Berliner (Bt) plants expressing the Vip3A protein or a combination of Vip3A + Cry 1Ab proteins (VipCot). Plants representing each of the...

Based on a weighted version of the bijection between Dyck paths and 2-Motzkin paths, we find combinatorial interpretations of two identities related to the Narayana polynomials and the Catalan numbers. These interpretations answer two problems posed recently by Coker. AMS Classification: 05A15, 05A19