Given an abstract of a paper, generate a title for this paper such that conveys the key focus of the paper.

Abstract: A series of monoclonal antibodies (mAb) was raised in mice against Schistosoma mansoni, which recognized a carbohydrate determinant on a major Mr greater than 200,000 schistosomulum surface antigen. These mAb cross-reacted with the surface of cercariae and miracidia and with schistosomula of S. haematobium and S. bovis. Other mAb were generated that only recognized a Mr 20,000 schistosomulum surface antigen; they did not cross-react with eggs or miracidia and were species specific. The anti-Mr 20,000 mAb of the IgG1 isotype exhibited high levels of complement-dependent cytotoxicity to schistosomula in vitro. IgM mAb that recognized carbohydrate epitopes of the Mr greater than 200,000 surface antigen blocked the lethal activity of the anti-Mr 20,000 mAb. The IgM anti-Mr greater than 200,000 mAb also reduced complement-dependent cytotoxicity of serum from mice vaccinated with irradiated cercariae.
IgM antibodies recognizing carbohydrate epitopes shared between schistosomula and miracidia of Schistosoma mansoni that block in vitro killing.

Abstract: We have studied the hematology, hemoglobin composition, and globin gene arrangements in one young Turkish boy with a beta zero-thalassemia homozygosity and in 11 of his relatives. Evidence is presented that the chromosome with the beta zero-thalassemia determinant carries a gamma-globin gene quadruplication, perhaps in a -G gamma-G gamma-G gamma-A gamma-gene arrangement. The eight gamma-globin genes in this patient produced G gamma and A gamma chains in a 95 to 5 ratio, and nearly 99% of the patient's hemoglobin was of the fetal type. The clinical condition resembled that of a thalassemia intermedia. HbF levels in eight beta-thalassemia heterozygotes varied between 0.5 and 4.2% and the percentages of G gamma in this HbF averaged at 87% or 95%; this level is to some extent related to the haplotype of the normal chromosome. All subjects carried four alpha-globin genes; a new BglII polymorphism was observed within the psi alpha-globin gene.
Beta zero-thalassemia in association with a gamma-globin gene quadruplication.

Abstract: The current exercise literature lacks physiological evidence for a stress reduction induced by high intensity aerobic work. The purpose of this study was to investigate the effectiveness of high intensity aerobic work on stress reduction and to evaluate the currently tenable hypotheses in view of the data on the response to high intensity work. The subjects participated in a control trial and two 20-min treadmill exercise trials at low and high (40% and 75% VO2max) intensity. The H- and M-wave responses to artificial stimulation of the tibial nerve (Angel and Hofmann, 1963) were used to assess spinal cord activation level which constituted the major dependent variable in the study. Low intensity exercise showed a 12.8% reduction in the H max/M max ratio (P less than 0.05) while high intensity exercise reduced the H max/M max ratio by 21.5% (P less than 0.0002). The two exercise treatment levels were also significantly different from each other (P less than 0.02). These data provide objective evidence for the efficacy of high intensity exercise in stress reduction as measured by the Hoffmann reflex and provide indirect evidence for a possible thermal hypothesis for exercise-induced stress reduction.
Motor neuron excitability: the Hoffmann reflex following exercise of low and high intensity.