Interaction of arbuscular mycorrhizal fungus (Glomus intraradices and Glomus etunicatum) with tomato plants grown under copper toxicity

In this research, the effect of two arbuscular mycorrhizal fungal (AMF) inoculation (Glomus intraradices and Glomus etunicatum) on tomato plants growing in nutrient solution with high concentrations of copper were studied. Copper (Cu) is an essential micronutrient for plant growth. In the present study, the effect of copper toxicity on growth, chlorophyll, sugar, protein content and antioxidant enzymes activity in both mycorrhizal and non-mycorrhizal tomato plants were studied. The experiment was performed by using two treatments (mycorrhizal and non-mycorrhizal) and five concentrations of CuSO4 solution (0, 1.5, 3.5, 5.5, 7.5 Mm CuSO4) added to Hogland nutrient solution (with half P concentration). Copper toxicity caused reduction in growth in all treatments (non-AM). This may be due to the accumulation of Cu in leaves. Fresh and dry weights of shoot and roots, total sugar content in both shoots and roots, the total chlorophyll content in leaves, protein content in shoots and roots, antioxidant enzyme activity and root colonization were determined.Keywords: Arbuscular mycorrhiza, tomato plants, copper toxicity, Glomus intraradices, Glomus etunicatum, oxidative stres

Video Capsule Retention in a Zenker Diverticulum

We report the case of a video capsule endoscope lodged within a Zenker diverticulum. The system that was equipped with a real-time viewer showed an unchanging image unlike esophageal or gastric mucosa, suggesting that the capsule was elsewhere. The presence of cervical discomfort suggested video capsule retention in a Zenker diverticulum. The capsule was removed endoscopically and reinserted using a hood-assisted endoscope and the procedure was completed

Communications Biophysics

Contains research objectives and summary of research on nine research projects split into four sections.National Institutes of Health (Grant 5 ROI NS11000-03)National Institutes of Health (Grant 1 P01 NS13126-01)National Institutes of Health (Grant 1 RO1 NS11153-01)National Institutes of Health (Grant 2 R01 NS10916-02)Harvard-M.I.T. Rehabilitation Engineering CenterU. S. Department of Health, Education, and Welfare (Grant 23-P-55854)National Institutes of Health (Grant 1 ROl NS11680-01)National Institutes of Health (Grant 5 ROI NS11080-03)M.I.T. Health Sciences Fund (Grant 76-07)National Institutes of Health (Grant 5 T32 GM07301-02)National Institutes of Health (Grant 5 TO1 GM01555-10

Component and fault identification in a machine structure using an acoustic signal

Thesis (Sc.D.)--Massachusetts Institute of Technology, Dept. of Mechanical Engineering, 1980.MICROFICHE COPY AVAILABLE IN ARCHIVES AND ENGINEERING.Includes bibliographical references.by Afarin Ordubadi.Sc.D

Identification du chemin de propagation dominant dans une situation acoustique comportant des trajets multiples

Dans beaucoup de situations pratiques, l'énergie d'une source acoustique se propage suivant de nombreux trajets de caractéristiques différentes. Souvent, on désire identifier les trajets les plus dominants. L'identification est souvent difficile, en particulier en présence d'échos multiples sur certains trajets (champ réverbérant). Dans cet article, on présente une méthode d'identification des trajets dominants. Elle utilise la technique de décomposition en valeurs singulières pour analyser le signal en provenance d'une source connue. Des résultats de simulation numérique pour plusieurs configurations sont présentés

Adaptive control of the milling process

Cutting forces in the milling process vary depending on the work-piece geometry and cutting parameters. When the cutting forces exceed a certain limit, the tool may break and cause damage to the work-piece and eventually to the machine tool. Adaptive cutting force control systems can be used to manipulate cutting operation parameters in order to keep the cutting forces at a safe level. Successful application of the method leads to increased metal removal rate and productivity in machining processes. In this thesis, a second order transfer function is used to represent the time invariant dynamics of a research milling machine's feed drive servo system. The command feed velocity is the input and the actual feed is the output of the servo system. The actual feed manipulates the cutting forces which are modelled by a first order time varying dynamic system. Three existing adaptive control methods have been designed to control the milling process. Adaptive Proportional Integral Derivative (PID), Pole-Placement and Model Reference Adaptive Control (MRAC) algorithms have been simulated and experimentally verified. It has been shown that when the dynamics of both the time invariant servo and the time variant cutting process are modelled correctly, the adaptive control algorithms can perform well. Simulations and experiments, which have been carried out with identical cutting conditions, show that PID and Pole-Placement controllers can be successfully applied to milling force control.Applied Science, Faculty ofMechanical Engineering, Department ofGraduat

Evaluierung der Dienstleistungen des AMS Jugendliche für Personen mit Migrationshintergrund

Das AMS Jugendliche versucht, die Leistungen und Beratungen auf die speziellen Bedürfnisse für Personen mit Migrationshintergrund anzupassen sowie allgemein laufend zu optimieren. Daher wurde die KMU FORSCHUNG AUSTRIA wie schon im Jahr 2007 neuerlich beauftragt, das Beratungsangebot und den Beratungsprozess im AMS Jugendliche zu analysieren, die Charakteristika und arbeitsmarktrelevanten Parameter der Zielgruppe zu untersuchen sowie die Wirkungen der organisatorischen Neuerungen zu überprüfen. Dabei erfolgte eine Analyse der Unterschiede zwischen Jugendlichen mit und ohne Migrationshintergrund sowie der Veränderungen im Vergleich zur Ersterhebung im Jahr 2007. Operativ wurde ein Mix aus qualitativen (teilnehmende Beobachtung, Workshops mit AMS-MitarbeiterInnen, Fokusgruppen mit jugendlichen AMS-KundInnen) und quantitativen Methoden (Primärerhebung) gewählt