Results of Treatment of Thyrotoxicosis after Postoperative Relapse

Ninety patients who had a recurrence of thyrotoxicosis after thyroidectomy have been reviewed. All 10 patients who had a second operation and 18 out of 20 patients treated with a full course of antithyroid drugs relapsed. These results differ greatly from the results of treatment of the first episode of thyrotoxicosis, whether by thyroidectomy or antithyroid drugs. Radioiodine is the treatment of choice in this group of patients, despite the high incidence of hypothyroidism.     

PRENATAL CARE—A Group Psychotherapeutic Approach

It has been well established that “normal” pregnancy gives rise to much anxiety whose source is variable. When not adequately dealt with, the anxiety may masquerade in the guise of physical symptoms such as fatigue, dizziness, nausea and vomiting, or, more often, as disquieting emotional counterparts, like irritability and depression.A study was undertaken in the outpatient obstetrical department at U.C.L.A. utilizing a group psychotherapeutic approach. The results helped the patients and offered training to staff in dealing with emotional problems of pregnancy. Patients were seen in groups of seven, twice a month for one-hour sessions. Participating in each group were an obstetrical resident, a psychiatric resident and a nurse. The subject material was not selected beforehand. Groups were similar in that the expected time of delivery of the patients was approximately the same. Results of the study suggested that the much needed emotional support may be supplied in this way with little to no additional time expenditure on the part of the physician or nurse.     

Partial purification of a legume nodulation factor present in coconut water

The nodulation of adventitious roots growing from segments of bean hypocotyl tissue was used as a bioassay for the material present in coconut water which stimulated nodulation. The active material in coconut water is acidic, but it was not possible to extract it from an acid solution with organic solvents. A purification of approximately 70-fold (on a dry wt basis) was obtained using activated charcoal, but at least 10 different compounds were present in the active fractions. A purified fraction of coconut water, which is stimulatory to the growth of carrot root explants, was active in the nodulation assay at a concentration of 2 μg/ml. This represents a 4000-fold purification of the diffusible fraction of coconut water. The charcoal fractionation procedure can be applied to the active material present in extracts of bean leaves.     

Competition between soil bacteria and fusarium

Summary The phenomenon of competition has been characterized in liquid medium and sterile soil systems using a variety of soil bacteria andFusarium oxysporum f.cubense as test organisms. For most of the bacteria, suppression of the fungus was the result of a biologically induced nitrogen deficiency, this effect being reversed by the addition of excess inorganic nitrogen. High populations of competitors were found in two soils of neutral pH, but no isolates competed in the acid San Alejo loam.Agrobacterium radiobacter was able to compete when San Alejo loam was limed to about pH 6.6. Inhibition of the fungus by a number of gram-positive, spore-forming rods could not be accounted for in terms of competition for nutrients or by antibiotic production in artificial media.The competitive ability ofA. radiobacter when tested in twelve Central American soils was found to be related to pH in acid and neutral environments but was correlated with texture, organic-matter content and total nitrogen in soils of intermediate pH. In all soils where inhibition occurred, the competitive effect was overcome by additions of inorganic nitrogen. Excluding the group ofBacillus spp., the competitive ability of soil bacteria was related to the ability to develop in the absence of amino acids and growth factors but could not be correlated with growth rates of the bacteria in soil or liquid medium.It is suggested that competition for nutrients is a significant means of ecological control among members of the soil microflora and, together with competitive interactions for space and oxygen, may be the major factors governing the biological control of soil-borne fungi.The investigation was supported in part by a grant from the United Fruit Company. Agronomy Paper No. 471.     

Detection of an unbalanced translocation (4;14) in a mildly retarded father and son by flow cytometry

Summary A child with impaired intelligence, minor dysmorphisms, obesity and genital hypoplasia was found to have an apparently balanced translocation, 46,XY,t(4;14)(q12;q13), following cytogenetic analysis. The same rearrangement was also detected in the child's father, who had similar phenotypic abnormalities to his son. Detailed study of flow karyotypes produced from lymphoblastoid cell lines established that in both patients the translocation was in fact unbalanced with approximately 11 million base pairs of DNA (corresponding to about 6.0% of chromosome 4 or 11.0% of chromosome 14) being lost.