A reactor designed for the ultrasonic stimulation of enzymatic esterification.

A laboratory scale ultrasonic flow reactor capable of enhancing enzymatic reactions has been built and characterized using as a model reaction the enzymatic synthesis of isoamyl acetate using Lipozyme 435 immobilized on a macroporous anion exchange resin. The efficiency of the reactor was determined in relation to ultrasonic power density (measured by 4-nitrophenol dosimetry), position of ultrasonic horn and temperature. The results show that ultrasound can enhance the process efficiency and also reduce the reaction time.

[The aerobic air microflora in airplanes on various international routes]. / Aeromicroflora aeroba în aeronavele de pe diferite rute internationale.

Aerobic microflora (bacteria, fungi), in the cock pits of the TAROM company (Boeing 707 and Il 62 M) airships flying on various international routes and airports was studied during November 1988-January 1989. 157-8,800 bacteria and 78-1,336 fungi per m3 air were recorded. Except for Staphylococcus aureus (hemolytic and non hemolytic) the greatest part of the isolated microorganisms was nonpathogenic for man: Bacillus, Corynebacterium, Neisseria, Staphylococcus epidermidis, Sarcina, Aspergillus, Penicillium etc. Several airships on the Asian airports contained a higher amount of bacteria and fungi but not higher than in the living rooms. Likewise, in high altitude flights, the microorganism amount was less than on the ground. The taxonomic spectrum of the bacteria and fungi isolated was almost identical on all the 9 international airports, thus suggesting the homogeneous and international character of saprophyte and pathogenic air microflora by means of the passenger and goods air flights.

[Current aspects of infectious mononucleosis]. / Aspecte actuale în mononucleoza infectioasa

The authors discuss present aspects in infectious mononucleosis, with reference to the cases admitted to the Clinic of communicable Diseases of Cluj-Napoca, i.e. 115 cases during the 1954--1973 period (3 to 13 cases a year). In most cases the clinical symptomatology was mild and the laboratory tests typical not giving rise to any diagnostic difficulties. However, 28 cases (25%) presented jaundice, with positive hepatic tests, so that a differential diagnosis was established with viral hepatitis. In 9 cases nervous manifestations were reported: 4 encephalitis, 1 neuritis of the hypoglossal nerve, 2 facial paralysis, 2 benign serous meningitis cases, all of which fully recovered. The Paul Bunnel-Hanganutiu test was positive in titers of 1 : 40 -- 1 : 1280, in all the cases. Corticotherapy was applied with good results in 24 cases. All the cases ran a favourable course. On admission, 45% of the patients came with a diagnosis of infectious mononucleosis; the others were admitted with a diagnosis of : diphteric angina, viral hepatitis, influenza, German measles, mups, typhoid fever, prolonged febrile syndrome.

[Staphylococcal infections in the Cluj-Napoca Clinic of Infectious Diseases during the years 1967-1972]. / Infectiile stafilococice in Clinica de boli infectioase, Cluj-Napoca, pe anii 1967--72.

Over a six year period, in the Clinic of Communicable Diseases of Cluj Napoca, 2301 patients with staphylococcal infections were admitted to the Clinic, representing 8% of the total number of patients admitted, and 3513 staphylococcal strains were isolated. A number of 43 of the 2301 patients died (1.8%), but staphylococcal infection was actually the cause of death in only 35 cases (1.5%) (septicemia, staphylococcal meningitis and pulmonary infections). Eight of the patients died from the basic disease (hepatitis, tetanus, paratyphoid C fever etc.). A number of 2246 Staphylococcus hemolyticus aureus, 80 non-hemolytic Staphylococcus aureus and 162 Staphylococcus albus strains were isolated; most of the strains were resistant to antibiotics in different proportions.