Скринінг діазотрофів, що здатні утворювати ефективні асоціації з рослинами пшениці

Проведено скринінг діазотрофів, виділених з ризосфери та ризоплани рослин пшениці 13 сортів. Показано, що найвищою нітрогеназною активністю характеризувався штам Azospirillum � � sp. 77, виділений з ризоплани ярої пшениці сорту Варяг. Інокуляція зазначеним штамом насіння пшениці сприяла підвищенню його схожості на 22,3 % та сухої маси паростків на 18,2 % у порівнянні з контролем, що свідчить про здатність Azospirillum sp. 77 виділяти біологічно активні речовини. Досліджуваний штам індукує деформації кореневих волосків, що підтверджує властивість Azospirillum sp. 77 викликати реакцію рослин пшениці сорту Варяг на інокуляцію. За даними попереднього скринінгу відібрано штам, здатний утворювати ефективні асоціації з рослинами пшениці.Проведен скрининг диазотрофов, выделенных из ризосферы и ризопланы растений пшеницы 13 сортов. Показано, что наибольшей нитрогеназной активностью характеризовался штамм Azospirillum sp. 77, выделенный из ризопланы яровой пшеницы сорта Варяг. Инокуляция указанным штаммом семян пшеницы способствовала увеличению всхожести на 22,3 % и сухой массы проростков на 18,2 %. в сравнении с контролем, что свидетельствует о способности Azospirillum sp. 77 выделять биологически активные вещества. Исследуемый штамм индуцирует деформации корневых волосков, что подтверждает способность Azospirillum sp. 77 вызывать реакцию растений пшеницы сорта Варяг на инокуляцию. По данным предварительного скрининга отобран штамм, способный образовывать эффективные ассоциации с растениями пшеницы.It is carried out a screening of diazotrophs, allocated from rhizosphere and rhizoplane of wheat plants of 13 sorts. It is shown, that strain Azospirillum sp. 77, allocated from rhizoplane of a spring wheat of sort Varyag, was characterized by the greatest nitrogenase activity. Inoculation of wheat seeds by specified strain promoted the increase of its germination on 22,3 % and dry weight of sprouts increase on 18,2 % in comparison with the control, that testifies the ability of Azospirillum sp. 77 to produce biologically active substances. The researched strain causes deformations of root fuzz that confirms the ability of Azospirillum sp. 77 to cause reaction on inoculation of wheat plants sorts Varyag. According to preliminary screening it is selected the strain, which capable to form effective associations with wheat plants

Mestscheiding: relaties tussen techniek, kosten, milieu en landbouwkundige waarde

Op de meeste veehouderijbedrijven in Nederland worden urine, feces en spoelwater gemengd bewaard. De samenstelling van deze mengmest (‘drijfmest’) sluit landbouwkundig en milieukundig niet altijd goed aan bij de behoefte van specifieke gewassen, sectoren en regio’s. In verband daarmee wordt drijfmest over grote afstanden getransporteerd. Scheiding van drijfmest in een dikke en een dunne fractie kan hierin verbetering brengen. Het onderhavige rapport geeft een overzicht van de effectiviteit, de kosten en het energiegebruik van een aantal relatief eenvoudige (‘low tech’) scheidingtechnieken

Study protocol to investigate the effect of a lifestyle intervention on body weight, psychological health status and risk factors associated with disease recurrence in women recovering from breast cancer treatment

Background Breast cancer survivors often encounter physiological and psychological problems related to their diagnosis and treatment that can influence long-term prognosis. The aim of this research is to investigate the effects of a lifestyle intervention on body weight and psychological well-being in women recovering from breast cancer treatment, and to determine the relationship between changes in these variables and biomarkers associated with disease recurrence and survival. Methods/design Following ethical approval, a total of 100 patients will be randomly assigned to a lifestyle intervention (incorporating dietary energy restriction in conjunction with aerobic exercise training) or normal care control group. Patients randomised to the dietary and exercise intervention will be given individualised healthy eating dietary advice and written information and attend moderate intensity aerobic exercise sessions on three to five days per week for a period of 24 weeks. The aim of this strategy is to induce a steady weight loss of up to 0.5 Kg each week. In addition, the overall quality of the diet will be examined with a view to (i) reducing the dietary intake of fat to ~25% of the total calories, (ii) eating at least 5 portions of fruit and vegetables a day, (iii) increasing the intake of fibre and reducing refined carbohydrates, and (iv) taking moderate amounts of alcohol. Outcome measures will include body weight and body composition, psychological health status (stress and depression), cardiorespiratory fitness and quality of life. In addition, biomarkers associated with disease recurrence, including stress hormones, estrogen status, inflammatory markers and indices of innate and adaptive immune function will be monitored. Discussion This research will provide valuable information on the effectiveness of a practical, easily implemented lifestyle intervention for evoking positive effects on body weight and psychological well-being, two important factors that can influence long-term prognosis in breast cancer survivors. However, the added value of the study is that it will also evaluate the effects of the lifestyle intervention on a range of biomarkers associated with disease recurrence and survival. Considered together, the results should improve our understanding of the potential role that lifestyle-modifiable factors could play in saving or prolonging lives

Do teachers need instructional analogies to teach mother-tongue (L1)? – Teachers’ perceptions and representations of difficult topics in mother-tongue education. L1

Wetensch. publicatieICLO

The intercultural identities of nonnative English teachers: An overview of research worldwide

Nonnative-English-speaking teachers who teach English as a second or foreign language (ESL/EFL) can play an important role in the promotion of intercultural competence and often have an advantage over native-English-speaking ESL/EFL teachers because they once were language learners and more aware of the difficulties that students can encounter. Therefore, a better understanding is needed of nonnative ESL/EFL teachers in language-and-culture teaching contexts. Research on how these teachers view themselves in relation to two or more cultural groups, i.e., teachers’ intercultural identities is useful in this respect, but has been scarce. In the present study, we systematically reviewed 21 studies on the intercultural identities of nonnative ESL/EFL teachers. Our study provides insight in key characteristics of these teachers’ intercultural identities, factors in the formation of these teachers’ intercultural identities, inconsistencies in studies to date, and directions for further research.Teaching and Teacher Learning (ICLON

Reconsidering research on teachers' professional identity

Wetensch. publicatieICLO

How can student teachers elicit experienced teachers' practical knowledge? Tools, suggestions and significance

Wetensch. publicatieICLO

Multi-method triangulation in a qualitative study on teachers' practical knowledge: An attempt to increase internal validity

Wetensch. publicatieICLO

The Intercultural Identities of Nonnative English Teachers: An Overview of Research Worldwide

Nonnative-English-speaking teachers who teach English as a second or foreign language (ESL/EFL) can play an important role in the promotion of intercultural competence and often have an advantage over native-English-speaking ESL/EFL teachers because they once were language learners and more aware of the difficulties that students can encounter. Therefore, a better understanding is needed of nonnative ESL/EFL teachers in language-and-culture teaching contexts. Research on how these teachers view themselves in relation to two or more cultural groups, i.e., teachers’ intercultural identities is useful in this respect, but has been scarce. In the present study, we systematically reviewed 21 studies on the intercultural identities of nonnative ESL/EFL teachers. Our study provides insight in key characteristics of these teachers’ intercultural identities, factors in the formation of these teachers’ intercultural identities, inconsistencies in studies to date, and directions for further research.Teaching and Teacher Learning (ICLON