Zentralblatt für Bakteriologie, Parasitenkunde, Infektionskrankheiten und Hygiene. Zweite Naturwissenschaftliche Abteilung: Allgemeine, Landwirtschaftliche und Technische Mikrobiologie最新文献

{"title":"Current Topics in Microbiology and Immunology (Ergebnisse der Mikrobiologie und Immunitätsforschung), Vol. 74, W. Arber (Ed.), et al.. Springer-Verlag, Berlin-Heidelberg-New York (1976)","authors":"St. Hermsdorf","doi":"10.1016/S0044-4057(77)80015-4","DOIUrl":"https://doi.org/10.1016/S0044-4057(77)80015-4","url":null,"abstract":"","PeriodicalId":101292,"journal":{"name":"Zentralblatt für Bakteriologie, Parasitenkunde, Infektionskrankheiten und Hygiene. Zweite Naturwissenschaftliche Abteilung: Allgemeine, Landwirtschaftliche und Technische Mikrobiologie","volume":"104 1","pages":"284-285"},"PeriodicalIF":0.0,"publicationDate":"1977-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"88036007","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Wissenschaftliche Veröffentlichungen von Prof. Dr. sc. agr. Dr. h. c. Dr. h. c. Geoeg Müller","authors":"Dr. sc. agr. Brigitte Hickisch","doi":"10.1016/S0044-4057(77)80076-2","DOIUrl":"10.1016/S0044-4057(77)80076-2","url":null,"abstract":"","PeriodicalId":101292,"journal":{"name":"Zentralblatt für Bakteriologie, Parasitenkunde, Infektionskrankheiten und Hygiene. Zweite Naturwissenschaftliche Abteilung: Allgemeine, Landwirtschaftliche und Technische Mikrobiologie","volume":"132 5","pages":"Pages 379-387"},"PeriodicalIF":0.0,"publicationDate":"1977-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1016/S0044-4057(77)80076-2","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"11552951","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Studies on the Formation of α-Amylase by Thermomonospora vulgaris","authors":"A.M. Allam ,&nbsp;A.M. Hussein,&nbsp;A.M. Ragab","doi":"10.1016/S0044-4057(77)80056-7","DOIUrl":"10.1016/S0044-4057(77)80056-7","url":null,"abstract":"<div><p>Conditions affecting the formation of α-amylase by static cultures of the thermophilic actinomycete <em>Thermomonospora vulgaris</em> were studied. The organism failed to grow under submerged culture conditions or when the culture medium was devoid of CaCO₃. α-Amylase was produced during the logarithmic phase of growth and maximum yield was obtained after 3 to 9 days of incubation. Growth and amylase formation took place only in a range from 45° to 55 °C; optimum temperature was 55 °C. Of the tested carbon sources only starch induced enzyme formation. Maximum enzyme yield was obtained when starch concentration of the medium was 2% and when ammonium citrate served as a nitrogen source. Crushed clay pots could substitute for CaCO₃ of the medium, but growth and amylase yield were less.</p></div><div><p>Der thermophile Aktinomyzet <em>Thermomonospora vulgaris</em> wuchs nicht in statischer Submerskultur oder wenn CaCO₃ fehlte. α-Amylase wurde in der logarithmischen Phase des Wachstums gebildet, mit dem Maximum am 3. oder 4. Tag der Bebrütung. Das Wachstum und die Amylasebildung verliefen zwischen 45° und 55 °C, das Maximum lag bei 55 °C. Von den untersuchten Substraten war nur Stärke in der Lage, α-Amylasebildung zu bewirken. Die höchste Enzymausbeute erfolgte bei 2%iger Stärkekonzentration und bei Anwendung von Ammoniumzitrat als Stickstoffquelle. CaCO₃ konnte durch gemahlene Tonscherben ersetzt werden, jedoch wurde die Enzymbildung dadurch herabgesetzt.</p></div>","PeriodicalId":101292,"journal":{"name":"Zentralblatt für Bakteriologie, Parasitenkunde, Infektionskrankheiten und Hygiene. Zweite Naturwissenschaftliche Abteilung: Allgemeine, Landwirtschaftliche und Technische Mikrobiologie","volume":"132 2","pages":"Pages 143-147"},"PeriodicalIF":0.0,"publicationDate":"1977-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1016/S0044-4057(77)80056-7","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"12063610","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Einsatz von Bioziden zur Beeinflussung der Bodenmikroflora und deren Umsetzungen","authors":"Gisela Höflich","doi":"10.1016/S0044-4057(77)80034-8","DOIUrl":"10.1016/S0044-4057(77)80034-8","url":null,"abstract":"<div><p>The influence of 544 biocides on soil-microflora was investigated by a special plate-test and by a soil-test. Fungi were particularly sensitive to active substances. They were more inhibited by a greater number of substances, by lower concentrations and by a larger time-interval than bacteria. A differentiated sensitivity of fungi becomes apparent.</p><p>The pseudomonads, a species of <em>Agrobacter</em> (AIA), flavobacteria and some coryneforme bacteria were relatively resistant. <em>Actinomyces</em> responded similar to fungi. The plate-test is suitable as preliminary test for the selection of substances retarding the degradation of straw.</p><p>These organisms already favoured by treatments with active substance locate in higher quantities in such soils where the biological balance was disturbed in after the injection. Therefore, the effect of the active substance exceeds that of the injection.</p><p>The displacement-effect by bacteria resistant to active substances and little active against cellulose plays a minor role in opposite to bacteria active against cellulose, because bacteria don't develop any homogeneous protective coat. A priority effect is therefore excluded.</p></div><div><p>Der Einfluß von 544 Mikrobiziden auf die Bodenmikroflora wurde in einem spezifischen Platten- und z. T. in einem Bodentest geprüft.</p><p>Pilze waren gegenüber den Wirkstoffen besonders empfindlich. Sie wurden von einer größeren Anzahl Substanzen, durch geringere Konzentrationen und über einen längeren Zeitraum gehemmt als die Bacterien. Eine differenzierte Empfindlichkeit der Pilze zeichnete sich ab.</p><p>Von den Bakterien waren die Pseudomonaden, ein <em>Agrobacter</em>-Typ (AIA), die Flavobakterien und einige coryneforme Bakterien relativ widerstandsfähig. Die Bazillen waren besonders empfindlich. Die Aktinomyzeten reagierten ähnlich wie die Pilze. Der Plattentest eignet sich als Vortest für die Auswahl von strohabbauhemmenden Präparaten.</p><p>In einem Boden, bei dem durch Wirkstoffeinsatz das biologische Gleichgewicht gestört war, siedelten sich nach Impfung meist die Organismentypen verstärkt an, die durch Wirkstoff behandlung ohnehin begünstigt waren. Der Wirkstoffeffekt übertrifft somit den Impfeffekt.</p><p>Bei der Substratbesiedlung spielt der Verdrängungseffekt durch wirkstoffresistente, wenig zellulaseaktive Bakterien gegenüber zellulaseaktiven aggressiven Pilzen nur eine untergeordnete Rolle, da die Bakterien keinen gleichmäßigen Schutzfilm bilden. Ein Prioritätseffekt wird somit ausgeschlossen.</p></div>","PeriodicalId":101292,"journal":{"name":"Zentralblatt für Bakteriologie, Parasitenkunde, Infektionskrankheiten und Hygiene. Zweite Naturwissenschaftliche Abteilung: Allgemeine, Landwirtschaftliche und Technische Mikrobiologie","volume":"132 1","pages":"Pages 55-66"},"PeriodicalIF":0.0,"publicationDate":"1977-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1016/S0044-4057(77)80034-8","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"74586301","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Studies on Protein Production by Yeasts","authors":"A.M. Abdel-Hafez,&nbsp;S.A.Z. Mahmoud,&nbsp;M. El-Sawy,&nbsp;E.M. Ramadan","doi":"10.1016/S0044-4057(77)80045-2","DOIUrl":"10.1016/S0044-4057(77)80045-2","url":null,"abstract":"&lt;div&gt;&lt;p&gt;The most efficient strains that gave high yield and showed rapid rate of growth and shortest generation time were used for determining their protein, non-protein nitrogen, and amino acids content. In addition, different classical foodstuffs were analyzed for protein and amino acids content for comparison with those yeast strains. These studies aimed at elucidating the nutritional value of selected strains of yeast.&lt;/p&gt;&lt;p&gt;&lt;em&gt;S. cerevisiae&lt;/em&gt; Gr. 104 contained high percentage of protein (55.19 %). Strains &lt;em&gt;S. cerevisiae&lt;/em&gt; (Gr. 104, F. 12, and D. 4), &lt;em&gt;C. utilis&lt;/em&gt; (F. 86), &lt;em&gt;C. tropicalis&lt;/em&gt; (F. 35 and F. 222), &lt;em&gt;C. mycoderma&lt;/em&gt; (Gr. 24), and &lt;em&gt;H. anomala&lt;/em&gt; (Gr. 5) gave higher amounts of protein per liter culture than other yeast cultures. The results obtained from the hydrolysis of yeast protein showed the presence of all essential amino acids. Lysine, leucine, aspartic acid, glutamic acid, and isoleucine were the major components of yeast protein.&lt;/p&gt;&lt;p&gt;Most amino acids of yeast strains were in the same range with eggs, meat muscle, and fish, but the amount of sulphur amino acids was lower than that found in animal proteins, however, higher than that of plant proteins. It was also found that the yeast strains contained an amount of lysine higher than that of cereal proteins. Thus, addition of such yeast protein to cereal foods will not only increase their nutritional value but also increase the assimilability of the original cereal proteins by compensating their deficiencies in some amino acids.&lt;/p&gt;&lt;/div&gt;&lt;div&gt;&lt;p&gt;Die wirkungsfähigsten Hefestämme, die einen hohen Ertrag ergaben, die schnellste Wachstumsrate und kürzeste Fortpflanzungszeit hatten, wurden benutzt, um ihr Eiweiß, ihren Nicht-Eiweiß-Stickstoff und ihren Aminosäuregehalt zu identifizieren. Außerdem wurden einige Lebensmittel auf ihren Eiweiß- und Aminosäuregehalt hin analysiert und mit Hefestämmen verglichen. Diese Untersuchungen wurden durchgeführt, um den Nährwert der ausgewählten Hefestämme zu ermitteln.&lt;/p&gt;&lt;p&gt;Die Ergebnisse zeigen, daß &lt;em&gt;Saccharomyces cerevisiae&lt;/em&gt; Gr. 104 einen hohen Prozentsatz an Eiweiß(55,19%) enthielt. Die Stämme &lt;em&gt;S. cerevisiae&lt;/em&gt; (Gr. 104, F. 12 und D. 4), &lt;em&gt;C. utilis&lt;/em&gt; (F. 86), &lt;em&gt;C. tropicalis&lt;/em&gt; (F. 35 und F. 222), &lt;em&gt;C. mycoderma&lt;/em&gt; (Gr. 24) und &lt;em&gt;H. anomala&lt;/em&gt; (Gr. 5) ergaben höhere Eiweißmengen pro Liter Kulturmedium als andere Hefekulturen.&lt;/p&gt;&lt;p&gt;Das Eiweiß in den Hefestämmen enthielt alle essentiellen Aminosäuren. Lysin, Leuzin, Asparaginsäure, Glutaminsäure und Isoleuzin waren die dominierenden Komponenten von Hefeeiweiß.&lt;/p&gt;&lt;p&gt;Die meisten Aminosäuren von Hefestämmen waren im gleichen Grade in Eiern, Muskelfleisch und Fisch vorhanden, aber der Anteil der schwefelhaltigen Aminosäuren war niedriger als der im Tiereiweiß, jedoch höher als im Pflanzeneiweiß. Es wurde auch gefunden, daß Hefestämme einen höheren Lysingehalt als das Korneiweiß besitzen. Die Zugabe von Hefeeiweiß zu Backwaren erhöht ni","PeriodicalId":101292,"journal":{"name":"Zentralblatt für Bakteriologie, Parasitenkunde, Infektionskrankheiten und Hygiene. Zweite Naturwissenschaftliche Abteilung: Allgemeine, Landwirtschaftliche und Technische Mikrobiologie","volume":"132 7","pages":"Pages 631-640"},"PeriodicalIF":0.0,"publicationDate":"1977-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1016/S0044-4057(77)80045-2","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"72800307","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Airborne Actinomycetes in the Atmosphere of Kuwait","authors":"A. Diab ,&nbsp;Samira A. Omar,&nbsp;H. Hertani","doi":"10.1016/S0044-4057(77)80010-5","DOIUrl":"10.1016/S0044-4057(77)80010-5","url":null,"abstract":"<div><p>The distribution of actinomycetes in the atmosphere of Kuwait was studied during 6 months, from January to June, 1973. Total viable counts of actinomycetes were higher in the atmosphere of the crowded commercial locality (Mubarakiya) than in the quieter residential one (Suliabikhat).</p><p>Maximum counts were obtained during February in the two localities. Lower counts during the hot dry season (May and June) may be attributed to high temperature and low relative humidity in this season.</p><p>The genus <em>Streptomyces</em> was dominant in the atmosphere and in the soil of the two studied localities. The genus <em>Nocardia</em> was found to be of higher incidence in the soil than in the atmosphere. <em>Micropolyspora</em> sp. were more frequent in the atmosphere and in the soil of the crowded locality than in the quieter residential one.</p><p>Classification of the genus <em>Streptomyces</em> to sections and series was tried. The Rectus (R) and the Spira (S) sections were dominant in the atmosphere of the two localities, while in their soil the Spira (S) section was highly dominant. The gray series was found to be the dominant one in all the sections recorded. The blue series among the (S) section was recorded only in the soil of the two localities.</p></div><div><p>In der Atmosphäre von Kuwait wurde die Verteilung von Aktinomyzeten an zwei verschiedenen Standorten (Hauptverkehrsgebiet und Wohnlage) untersucht. In der heißen Jahreszeit (Mai und Juni) waren die Gehalte auf Grund hoher Temperatur und geringer Luftfeuchtigkeit niedriger als im Februar, dem Monat mit den höchsten Werten.</p><p>Die Gattung <em>Streptomyces</em> war am häufigsten vertreten, <em>Nocardia</em> im Boden häufiger als in der Luft. <em>Micropolyspora</em> war sowohl im Boden als auch in der Luft des Hauptverkehrsgebietes häufiger als im Wohngebiet.</p><p>Eine weitere Klassifizierung der Gattung <em>Streptomyces</em> wurde versucht.</p></div>","PeriodicalId":101292,"journal":{"name":"Zentralblatt für Bakteriologie, Parasitenkunde, Infektionskrankheiten und Hygiene. Zweite Naturwissenschaftliche Abteilung: Allgemeine, Landwirtschaftliche und Technische Mikrobiologie","volume":"132 3","pages":"Pages 273-282"},"PeriodicalIF":0.0,"publicationDate":"1977-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1016/S0044-4057(77)80010-5","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"12114754","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Sensitivity of Cellulolytic Bacteria to Antibiotics","authors":"J. Szegi ,&nbsp;H. Gamal El-Din","doi":"10.1016/S0044-4057(77)80077-4","DOIUrl":"10.1016/S0044-4057(77)80077-4","url":null,"abstract":"<div><p>The sensitivity of eight cellulolytic bacterial strains to eight antibiotics was tested. The results showed that, in general, the strains belonging to <em>Cytophaga, Cellvibrio</em>, and <em>Cellfalcicula</em> are more sensitive to antibiotics than those strains that belong to <em>Sporocytophaga</em> and <em>Cellulomonas</em>. The inhibitory activity of the tested antibiotics, though differing with different strains, showed the following categories: tetracycline, erythromycin, and chloromycetin were most active, kanamycin, streptomycin, and neomyein were intermediate, while novobiocin and penicillin showed low activity.</p></div><div><p>Die Empfindlichkeit von acht zellulolytischen Bakterienstämmen gegenüber acht Antibiotika wurde geprüft. Die Ergebnisse zeigten, daß Stämme, die zu <em>Cytophaga, Cellvibrio</em> und <em>Cellfalcicula</em> gehören, im allgemeinen gegen Antibiotika empfindlicher sind als Stämme, die <em>Sporocytophaga</em> und <em>Cellulomonas</em> zuzuordnen sind. Die geprüften Antibiotika lassen sich, auch wenn es bei den verschiedenen Stämmen Unterschiede gibt, hinsichtlich ihrer hemmenden Aktivität wie folgt reihen: Tetracyclin, Erythromycin und Chloromycin waren am aktivsten, Kanamycin, Streptomycin und Neomycin waren weniger aktiv, während Novobiocin und Penicillin eine niedrige Aktivität zeigten.</p></div>","PeriodicalId":101292,"journal":{"name":"Zentralblatt für Bakteriologie, Parasitenkunde, Infektionskrankheiten und Hygiene. Zweite Naturwissenschaftliche Abteilung: Allgemeine, Landwirtschaftliche und Technische Mikrobiologie","volume":"132 5","pages":"Pages 388-391"},"PeriodicalIF":0.0,"publicationDate":"1977-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1016/S0044-4057(77)80077-4","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"11621219","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Effect of Three Nematicides on the Growth of Some Phytopathogenic Bacteria and Fungi","authors":"M. El-Khadem ,&nbsp;F. Mehiar ,&nbsp;M.S. Embabi","doi":"10.1016/S0044-4057(77)80028-2","DOIUrl":"10.1016/S0044-4057(77)80028-2","url":null,"abstract":"<div><p>The effect of three nematicides, aldicarb, fensulfothion, and phenamiphos at four concentrations (1, 5, 25, and 125 ppm) was tested on the growth of five bacteria, <em>Agrobacterium tumefaciens, Corynebacterium fascians, Erwinia carotovora, Pseudomonas solanacearum</em>, and <em>Streptomyces scabies</em> and four fungi, <em>Fusarium oxysporum</em> f. sp. <em>vasinfectum, Fusarium solani, Rhizoctonia solani, and Sclerotium bataticola</em>. Of the bacteria, <em>P. solanacearum</em> was most affected by the chemicals at all concentrations, while <em>E. carotovora</em> was least affected. Fensulfothion was generally the most effective nematicide on the bacteria tested, while phenamiphos was the least effective.</p><p>Similarly, the effect of the chemicals on the fungi tested varied greatly. <em>F. solani</em> and <em>R. solani</em> were generally most affected, followed by <em>F. oxysporum</em>, while <em>S. bataticola</em> was least affected. Of the chemicals tested, phenamiphos was generally the most effective, followed by fonsulfothion, while aldicarb was the least effective.</p></div><div><p>Untersucht wurden die Einwirkungen drei verschiedener Nematozide (Aldicarb, Fensulfothion und Phenamiphos) bei vier Konzentrationen auf das Wachstum fünf verschiedener Bakterien (<em>Agrobacterium tumefaciens, Corynebacterium fascians, Erwinia carotovora, Pseudomonas solanacearum</em> und <em>Streptomyces scabies</em>) und vier Pilze (<em>Fusarium oxysporum</em> f. sp. <em>vasinfectum, Fusarium solani, Rhizoctonia solani</em> und <em>Sclerotium bataticola</em>).</p><p>Die Empfindlichkeit der untersuchten Bakterien bzw. Pilze war verschieden. Das Wachstum von <em>P. solanacearum</em> bzw. <em>F. solani</em> und <em>R. solani</em> wurde am stärksten gehemmt, während <em>E. carotovora</em> bzw. <em>S. bataticola</em> am schwächsten beeinflußt waren. Auf das Wachstum der untersuchten Bakterien zeigte Fensulfothion die stärkste Hemmwirkung, Phenamiphos die schwächste. Phenamiphos hemmte das Wachstum der untersuchten Pilze am stärksten, Aldicarb dagegen am schwächsten.</p></div>","PeriodicalId":101292,"journal":{"name":"Zentralblatt für Bakteriologie, Parasitenkunde, Infektionskrankheiten und Hygiene. Zweite Naturwissenschaftliche Abteilung: Allgemeine, Landwirtschaftliche und Technische Mikrobiologie","volume":"132 4","pages":"Pages 369-376"},"PeriodicalIF":0.0,"publicationDate":"1977-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1016/S0044-4057(77)80028-2","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"11362253","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Stepwise Selection of Efficient Rhizobial Cultures Through Cultural Characteristics","authors":"V.R. Balasundaram ,&nbsp;Abhiswar Sen","doi":"10.1016/S0044-4057(77)80043-9","DOIUrl":"10.1016/S0044-4057(77)80043-9","url":null,"abstract":"<div><p>Nodulation and shoot nitrogen of two varieties of soybean <em>(Glycine max)</em> were studied with twenty strains of <em>Rhizobium japonicum</em>. A number of cultural characteristics of the strains in isolation to the symbiotic system were also studied. A stepwise selection method was employed for detecting efficient cultures through the cultural characteristics which showed association with the steps in the symbiotic system.</p><p>Nodulation of one variety was found to be associated with the dehydrogenase activity and the growth of microbes in the medium containing soil extract, whereas the nodulation of another variety showed association with the growth in the media containing asparagine and tryptophane. The shoot nitrogen of one nodulated cultivar correlated with the microbial growth in Elkan's medium in the medium containing serine and glucose, whereas the shoot nitrogen of the other nodulating variety correlated with the growth of the cultures in the medium containing aspartic acid.</p><p>The validity of this approach to the problem for detecting efficient strains through cultural characteristics was discussed.</p></div><div><p>Knöllchenbildung und Stickstoffgehalt zweier Sojabohnensorten nach Beimpfung mit 20 verschiedenen Stämmen von <em>Rhizobium japonicum</em> wurden untersucht. Verschiedene Kulturcharakteristika und symbiontische Beziehungen wurden erforscht. Es gelangte eine Stufen-Selektionsmethode zur Anwendung. Sie wird für die Züchtung aktiver Kulturen vorgeschlagen.</p></div>","PeriodicalId":101292,"journal":{"name":"Zentralblatt für Bakteriologie, Parasitenkunde, Infektionskrankheiten und Hygiene. Zweite Naturwissenschaftliche Abteilung: Allgemeine, Landwirtschaftliche und Technische Mikrobiologie","volume":"132 7","pages":"Pages 623-627"},"PeriodicalIF":0.0,"publicationDate":"1977-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1016/S0044-4057(77)80043-9","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"11768261","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Mutagene Behandlung von Acetobacter suboxydans mit Äthylmethansulfonat (EMS)","authors":"Ruth Kölblin","doi":"10.1016/S0044-4057(77)80003-8","DOIUrl":"10.1016/S0044-4057(77)80003-8","url":null,"abstract":"<div><p><em>Acetobacter suboxydans</em> (4) was trated with 0,35 m EMS. The aim was to get a mutant with the ability to produce 2-Keto-L-gulonic acid (Provitamin C). 106 colonies were tested. One of these colonies showed the searched metabolic performance. The test war made with paper-chromatography.</p></div><div><p><em>Acetobacter suboxydans</em> (4) wurde einer mutagenen Behandlung mit 0,35 m EMS unterworfen mit dem Ziel, eine Mutante mit der Fähigkeit zur Bildung von 2-Keto-L-gulonsäure (Provitamin C) zu erhalten. Von 106 geprüften Kolonien zeigte eine Kolonie die gewünschte Stoffwechselleistung. Der Nachweis erfolgte papierchromatographisch.</p></div>","PeriodicalId":101292,"journal":{"name":"Zentralblatt für Bakteriologie, Parasitenkunde, Infektionskrankheiten und Hygiene. Zweite Naturwissenschaftliche Abteilung: Allgemeine, Landwirtschaftliche und Technische Mikrobiologie","volume":"132 3","pages":"Pages 204-208"},"PeriodicalIF":0.0,"publicationDate":"1977-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1016/S0044-4057(77)80003-8","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"79393709","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}