Tait and Tutte made famous conjectures stating that all members of certain graph classes contain Hamiltonian Cycles. Although the Tait and Tutte conjectures were disproved, Barnette continued this tradition by conjecturing that all planar, cubic, 3-connected, bipartite graphs are Hamiltonian, a problem that has remained open since its formulation in the late 1960s. This paper has a twofold purp...

Hair casts (HCs) are thin, elongated, firm, whitish cylindrical concretions which ensheath the hair shaft and can be easily dislodge. They are of two different types: peripilar and parakeratotic keratin cast. Due to its clinical resemblance to pediculosis capitis, the entity is also known as pseudonits. Al though not unusual, false diagnoses are common, and thus, it is very important to correct...

Sexually transmitted diseases (STD) are very frequent in the whole world. Males who do not use a condom during their sexual relations are at great risk. We report cases of STD during six months of observation, among homosexual/bisexual males who participate in the Project Horizonte. There were 16 cases of genital warts, 6 cases of human immunodeficiency virus infection, 24 cases of unspecific u...

El objetivo fue identificar la especie, prevalencia, manifestaciones clínicas y evaluar eficacia de dos tratamientos para el control piojos en búfalos agua del trópico México. Se realizó un estudio observacional descriptivo prospectivo, con visitas semanales a rancho debúfalos durante meses. inspeccionaron 300 búfalas, conocer prevalencia especie piojo, adicionalmente grupos 20 se describieron ...