ALBERT — All Library Books, journals and Electronic Records Telegrafenberg

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Digitale Medien

Die sprengtechnisch wichtigen Eigenschaften explosibler Gasgemische und der Einfluß einer starken Vorverdichtung auf eine Erhöhung ihrer Sprengwirkung (1928)

Haid, A. ; Schmidt, A.

Weinheim : Wiley-Blackwell

Zeitschrift für die chemische Industrie 41 (1928), S. 1309-1312

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ISSN: 0044-8249

Schlagwort(e): Chemistry ; General Chemistry

Quelle: Wiley InterScience Backfile Collection 1832-2000

Thema: Chemie und Pharmazie

Zusätzliches Material: 3 Tab.

Materialart: Digitale Medien

URL: http://dx.doi.org/10.1002/ange.19280415003

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2

Digitale Medien

Brandbomben. Ein Beitrag zum Luftschutzproblem. Von Brand-Oberingenieur Rumpf, Königsberg i. Pr. verlag E. S. Mittler & Sohn, Berlin 1932. Preis RM. 12,- (1932)

Haid

Weinheim : Wiley-Blackwell

Zeitschrift für die chemische Industrie 45 (1932), S. 555-555

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ISSN: 0044-8249

Schlagwort(e): Chemistry ; General Chemistry

Quelle: Wiley InterScience Backfile Collection 1832-2000

Thema: Chemie und Pharmazie

Materialart: Digitale Medien

URL: http://dx.doi.org/10.1002/ange.19320453416

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3

Digitale Medien

Über den Isoamylnitrosoessigester und die Einwirkung von nitrosen Gasen auf den Allyl-, den Dimethyl- und den Diäthylacetessigester (1910)

Schmidt, Julius ; Haid, August

Weinheim : Wiley-Blackwell

Liebigs Annalen 377 (1910), S. 23-30

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ISSN: 0075-4617

Schlagwort(e): Chemistry ; Organic Chemistry

Quelle: Wiley InterScience Backfile Collection 1832-2000

Thema: Chemie und Pharmazie

Materialart: Digitale Medien

URL: http://dx.doi.org/10.1002/jlac.19103770103

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4

Digitale Medien

Studien in der Fluorenreihe (1912)

Schmidt, Julius ; Retzlaff, Friedrich ; Haid, August

Weinheim : Wiley-Blackwell

Liebigs Annalen 390 (1912), S. 210-234

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ISSN: 0075-4617

Schlagwort(e): Chemistry ; Organic Chemistry

Quelle: Wiley InterScience Backfile Collection 1832-2000

Thema: Chemie und Pharmazie

Materialart: Digitale Medien

URL: http://dx.doi.org/10.1002/jlac.19123900204

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5

Digitale Medien

Über die sprengtechnischen Eigenschaften der Flüssigluftsprengstoffe (1924)

Kast, H. ; Haid, A.

Weinheim : Wiley-Blackwell

Zeitschrift für die chemische Industrie 37 (1924), S. 973-981

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ISSN: 0044-8249

Schlagwort(e): Chemistry ; General Chemistry

Quelle: Wiley InterScience Backfile Collection 1832-2000

Thema: Chemie und Pharmazie

Zusätzliches Material: 4 Ill.

Materialart: Digitale Medien

URL: http://dx.doi.org/10.1002/ange.19240375002

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6

Digitale Medien

Über die sprengtechnischen Eigenschaften der wichtigsten Initialsprengstoffe (1925)

Kast, H. ; Haid, A.

Weinheim : Wiley-Blackwell

Zeitschrift für die chemische Industrie 38 (1925), S. 43-52

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ISSN: 0044-8249

Schlagwort(e): Chemistry ; General Chemistry

Quelle: Wiley InterScience Backfile Collection 1832-2000

Thema: Chemie und Pharmazie

Zusätzliches Material: 3 Ill.

Materialart: Digitale Medien

URL: http://dx.doi.org/10.1002/ange.19250380303

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7

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IJERPH, Vol. 16, Pages 3399: Leg Dominance as a Risk Factor for Lower-Limb Injuries in Downhill Skiers—A Pilot Study into Possible Mechanisms (2019)

Arunee Promsri, Alessia Longo, Thomas Haid, Aude-Clémence M. Doix, Peter Federolf

MDPI

In: International Journal of Environmental Research and Public Health

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Publikationsdatum: 2019

Beschreibung: Leg dominance has been reported as one potential risk factor for lower-limb injuries in recreational downhill skiers. The current study proposed and tested two possible mechanisms for a leg dominance effect on skiing injuries—imbalance of the knee muscle strength and bilateral asymmetry in sensorimotor control. We hypothesized that the knee muscle strength (Hypothesis 1; H1) or postural control (Hypothesis 2; H2) would be affected by leg dominance. Fifteen well-experienced recreational downhill skiers (aged 24.3 ± 3.2 years) participated in this study. Isometric knee flexor/extensor muscle strength was tested using a dynamometer. Postural control was explored by using a kinematic principal component analysis (PCA) to determine the coordination structure and control of three-dimensional unipedal balancing movements while wearing ski equipment on firm and soft standing surfaces. Only H2 was supported when balancing on the firm surface, revealing that when shifting body weight over the nondominant leg, skiers significantly changed the coordination structure (p 〈 0.006) and the control (p 〈 0.004) of the lifted-leg movements. Based on the current findings, bilateral asymmetry in sensorimotor control rather than asymmetry in strength seems a more likely mechanism for the previously reported effect of leg dominance on lower-limb injury risk in recreational downhill skiers.

Print ISSN: 1661-7827

Digitale ISSN: 1660-4601

Thema: Energietechnik , Medizin

Publiziert von MDPI

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8

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Entropy, Vol. 21, Pages 614: Changed Temporal Structure of Neuromuscular Control, Rather Than Changed Intersegment Coordination, Explains Altered Stabilographic Regularity after a Moderate Perturbation of the Postural Control System (2019)

Felix Wachholz, Tove Kockum, Thomas Haid, Peter Federolf

MDPI

In: Entropy

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Publikationsdatum: 2019

Beschreibung: Sample entropy (SaEn) applied on center-of-pressure (COP) data provides a measure for the regularity of human postural control. Two mechanisms could contribute to altered COP regularity: first, an altered temporal structure (temporal regularity) of postural movements (H1); or second, altered coordination between segment movements (coordinative complexity; H2). The current study used rapid, voluntary head-shaking to perturb the postural control system, thus producing changes in COP regularity, to then assess the two hypotheses. Sixteen healthy participants (age 26.5 ± 3.5; seven females), whose postural movements were tracked via 39 reflective markers, performed trials in which they first stood quietly on a force plate for 30 s, then shook their head for 10 s, finally stood quietly for another 90 s. A principal component analysis (PCA) performed on the kinematic data extracted the main postural movement components. Temporal regularity was determined by calculating SaEn on the time series of these movement components. Coordinative complexity was determined by assessing the relative explained variance of the first five components. H1 was supported, but H2 was not. These results suggest that moderate perturbations of the postural control system produce altered temporal structures of the main postural movement components, but do not necessarily change the coordinative structure of intersegment movements.

Digitale ISSN: 1099-4300

Thema: Chemie und Pharmazie , Physik

Publiziert von MDPI

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9

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Agronomy, Vol. 9, Pages 214: Effect of Salinity and Water Stress on the Essential Oil Components of Rosemary (Rosmarinus officinalis L.) (2019)

Radhia Sarmoum, Soumia Haid, Mohamed Biche, Zahreddine Djazouli, Bachar Zebib, Othmane Merah

MDPI

In: Agronomy

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Publikationsdatum: 2019

Beschreibung: The effect of salinity and water stresses on the essential oil components of Rosmarinus officinalis essential oil was investigated. Rosemary plants were submitted to different water treatments: tap water (TW), salt water (SW) and without irrigation (NIR). GC/MS analysis showed that ten and eleven volatile compounds were identified in essential oil of rosemary plants irrigated with tap water (TW) and salt water (SW), respectively. However, thirteen volatile compounds were identified in essential oil of non-irrigated plants (NIR). Moreover, among these compounds, α-Pinene, Eucalyptol (1,8 Cineol), Camphene, Borneol, D-verbenone, Bornyl acetate were the major components of oil. Also, GC/MS results highlighted that non-irrigated rosemary plants showed the highest essential oil yield (Y). Obtained oil yields followed the order YNIR 〉 YTW 〉 YSW. In conclusion, qualitative and quantitative differences in rosemary essential oil components were highlighted in relation to water stress.

Digitale ISSN: 2073-4395

Thema: Land- und Forstwirtschaft, Gartenbau, Fischereiwirtschaft, Hauswirtschaft , Wirtschaftswissenschaften

Publiziert von MDPI

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Entropy, Vol. 21, Pages 70: The Effect of Cognitive Resource Competition Due to Dual-Tasking on the Irregularity and Control of Postural Movement Components (2019)

Thomas Haid, Peter Federolf

MDPI

In: Entropy

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Publikationsdatum: 2019

Beschreibung: Postural control research suggests a non-linear, n-shaped relationship between dual-tasking and postural stability. Nevertheless, the extent of this relationship remains unclear. Since kinematic principal component analysis has offered novel approaches to study the control of movement components (PM) and n-shapes have been found in measures of sway irregularity, we hypothesized (H1) that the irregularity of PMs and their respective control, and the control tightness will display the n-shape. Furthermore, according to the minimal intervention principle (H2) different PMs should be affected differently. Finally, (H3) we expected stronger dual-tasking effects in the older population, due to limited cognitive resources. We measured the kinematics of forty-one healthy volunteers (23 aged 26 ± 3; 18 aged 59 ± 4) performing 80 s tandem stances in five conditions (single-task and auditory n-back task; n = 1–4), and computed sample entropies on PM time-series and two novel measures of control tightness. In the PM most critical for stability, the control tightness decreased steadily, and in contrast to H3, decreased further for the younger group. Nevertheless, we found n-shapes in most variables with differing magnitudes, supporting H1 and H2. These results suggest that the control tightness might deteriorate steadily with increased cognitive load in critical movements despite the otherwise eminent n-shaped relationship.

Digitale ISSN: 1099-4300

Thema: Chemie und Pharmazie , Physik

Publiziert von MDPI

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