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Articoli di riviste sul tema "793.3/2"
1
Naderi, Ruhollah, Farzad Bijani, Akbar Karami, Bhagirath S. Chauhan e Todd P. Egan. "Effects of summer savory (Satureja hortensis L.) and sweet corn (Zea mays L. saccharata) intercropping on crop production and essential oil profiles of summer savory". PeerJ 11 (30 gennaio 2023): e14753. http://dx.doi.org/10.7717/peerj.14753.
Testo completoAbstract (sommario):
A 2-year field experiment evaluated the effects of sweet corn-summer savory intercropping on crop productivity and essential oil (EO) composition of summer savory. Five cropping patterns of Corn 100%:Savory 0%, C75:S25, C50:S50, C25:S75, and C0:S100 were tested. The highest corn yield (2,440 kg ha−1) was obtained in a corn monoculture, but was not significantly different from C75:S25 or C50:S50. However, in both years the highest savory yield was obtained in S100 (793.3 g m−2 and 816.6 g m−2, respectively). Savory yields decreased as the proportion of corn increased. The land equivalent ratios in C25:S75, C50:S50, and C75:S25 were 1.54 ± 0.07, 1.56 ± 0.03, and 1.35 ± 0.1, respectively. Monocropped savory had the highest EO value followed by C25:S75 and C50:C50. However, no significant differences were found among these three treatments. Gas chromatography-mass spectrometry (GC–MS) analysis showed that the major components were carvacrol (35.88%–42.96%), γ-terpinene (18.45%–20.03%), ρ-cymene (11.77%–12.24%), and α-terpinene (2.75%–3.96%). The highest amount of carvacrol was recorded in C25:S75 (42.96%). This study suggests that intercropping of corn and savory represents an effective sustainable strategy, especially for smallholders, as a way to increase their overall land productivity and to improve the quality of savory’s EO.
2
Bernat, Katarzyna, Magdalena Zielińska, Dorota Kulikowska, Agnieszka Cydzik-Kwiatkowska, Irena Wojnowska-Baryła, Beata Waszczyłko-Miłkowska e Beata Piotrowicz. "The effect of the excess sludge pretreatment on biogas productivity". Technical Sciences 1, n. 22 (11 febbraio 2019): 75–86. http://dx.doi.org/10.31648/ts.4349.
Testo completoAbstract (sommario):
To intensify biogas production during anaerobic stabilization of organic matter in sludge, pretreatment is applied. The effect of pretreatment of excess activated sludge (AS) and excess aerobic granular sludge (GS) on biogas productivity (BP) and composition was investigated. The sludge was pretreated with homogenization (6,500 rpm for 0.5 min (H0.5) and 1 min (H1.0)) or ultrasound disintegration at 20 kHz (50% amplitude for 2 min (D50%_2.0) and 4 min (D50%_4.0), and 100% amplitude for 4 min (D100%_4.0)). BP of AS of GS without pretreatment was 603.3±5 dm3/kg TS (793.4±7 dm3/kg VS); that was 200.6±4 dm3/kg TS (480.8±6 dm3/kg VS). With disintegration, the BP of AS increased by 7.8% (650.4±10 dm3/kg TS) (D50%_2.0) and 16.1% (700.6±11 dm3/kg TS) (D100%_4.0), and that of GS increased by 7.0% (214.0±5 dm3/kg TS) (D50%_2.0) and 16.0% (232.8±5 dm3/kg TS) (D100%_4.0). With homogenization, BP increased by 2.0-3.0% (AS) and 1.6-3.2% (GS).
3
Sebastian, C. Peter, Sudhindra Rayaprol, Rolf-Dieter Hoffmann, Ute Ch Rodewald, Tania Pape e Rainer Pöttgen. "Structure and Properties of α- and β-CeCuSn: A Single Crystal and Mössbauer Spectroscopic Investigation". Zeitschrift für Naturforschung B 62, n. 5 (1 maggio 2007): 647–57. http://dx.doi.org/10.1515/znb-2007-0504.
Testo completoAbstract (sommario):
Abstract Two modifications of CeCuSn were prepared from the elements: the high-temperature (β ) modification crystallizes directly from the quenched sample, while the low-temperature (α) modification is formed after annealing at 700 °C for one month. Both modifications were investigated by powder and single crystal X-ray diffraction. We find for β -CeCuSn the ZrBeSi-type structure, space group P63/mmc, a = 458.2(1), c = 793.7(2) pm, wR2 = 0.0727, 148 F2 values, 8 variable parameters. In the case of α-CeCuSn we find the NdPtSb-type structure, space group P63mc, a = 458.4(1), c = 785.8(2) pm, wR2 = 0.0764, 233 F2 values, 11 variable parameters. The copper and tin atoms build up layers of ordered [Cu3Sn3] hexagons. The layers are planar in β -CeCuSn, however, with highly anisotropic displacements of the copper and tin atoms. In α-CeCuSn a puckering effect is observed resulting in a decrease of the c lattice parameter. Both modifications of CeCuSn exhibit antiferromagnetic ordering, but there is a considerable difference in their magnetic behaviour. Anomalies in the physical properties of the α- and β -modifications of CeCuSn have been detected by Mössbauer spectroscopy and magnetic and specific heat measurements, which serve to explain the structure-property relations.
4
Mendes, Andreia, Ana Armada, Lília I. L. Cabral, Patrícia S. M. Amado, Lenea Campino, Maria L. S. Cristiano e Sofia Cortes. "1,2,4-Trioxolane and 1,2,4,5-Tetraoxane Endoperoxides against Old-World Leishmania Parasites: In Vitro Activity and Mode of Action". Pharmaceuticals 15, n. 4 (3 aprile 2022): 446. http://dx.doi.org/10.3390/ph15040446.
Testo completoAbstract (sommario):
Leishmaniasis remains one of the ten Neglected Tropical Diseases with significant morbidity and mortality in humans. Current treatment of visceral leishmaniasis is difficult due to a lack of effective, non-toxic, and non-extensive medications. This study aimed to evaluate the selectivity of 12 synthetic endoperoxides (1,2,4-trioxolanes; 1,2,4,5-tetraoxanes) and uncover their biochemical effects on Leishmania parasites responsible for visceral leishmaniasis. The compounds were screened for in vitro activity against L. infantum and L. donovani and for cytotoxicity in two monocytic cell lines (J774A.1 and THP-1) using the methyl thiazol tetrazolium assay. Reactive oxygen species formation, apoptosis, and mitochondrial impairment were measured by flow cytometry. The compounds exhibited fair to moderate anti-proliferative activity against promastigotes of the 2 Leishmania species, with IC50 values ranging from 13.0 ± 1.7 µM to 793.0 ± 37.2 µM. Tetraoxanes LC132 and LC138 demonstrated good leishmanicidal activity on L. infantum amastigotes (IC50 13.2 ± 5.2 and 23.9 ± 2.7 µM) with low cytotoxicity in mammalian cells (SIs 22.1 and 118.6), indicating selectivity towards the parasite. Furthermore, LC138 was able to induce late apoptosis and dose-dependent oxidative stress without affecting mithocondria. Compounds LC132 and LC138 can be further explored as potential antileishmanial chemotypes.
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Han, Z., Y. Shen, J. Diana Di Mavungu, D. Zhang, D. Nie, K. Jiang, S. De Saeger e Z. Zhao. "Relationship between environmental conditions, TRI5 gene expression and deoxynivalenol production in stored Lentinula edodes infected with Fusarium graminearum". World Mycotoxin Journal 11, n. 2 (25 aprile 2018): 177–86. http://dx.doi.org/10.3920/wmj2017.2245.
Testo completoAbstract (sommario):
This study made the first attempt to relate the production of deoxynivalenol (DON) to the expression of TRI5 gene in Fusarium graminearum as a function of interacting environmental factors (water activity (aw) (0.95-0.98), temperature (20-30 °C) and incubation time (7 day-28 day)), so as to investigate its production mechanisms in Lentinula edodes. Changes in temperature, water activity and incubation time could significantly (P<0.01) affect DON production and TRI5 gene expression. The highest DON concentration (793.5±27.4 μg/kg) and TRI5 gene expression (2−ΔΔCt=38.8±4.8) were observed when the cultures were incubated at 20 °C and 0.98 aw for 21 days. Multi-regression analysis was performed and nonlinear models based on polynomial equations were established to uncover the individual effects of temperature, water activity and incubation time as well as their interactions on DON production and TRI5 gene expression. The established model was further used to develop contour maps to predict the DON production and TRI5 gene expression in relation to storage conditions in L. edodes. Highly significant positive correlation between DON production and fold TRI5 gene expression (R=0.5534, P<0.0001) was observed in this commodity. The production mechanisms of DON in L. edodes revealed in the present study will be beneficial for developing more effective targeted control strategies.
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McIlvaine, Devon, Michael Stewart e Robert Anderson. "Noise Exposure Levels for Musicians During Rehearsal and Performance Times". Medical Problems of Performing Artists 27, n. 1 (1 marzo 2012): 31–36. http://dx.doi.org/10.21091/mppa.2012.1006.
Testo completoAbstract (sommario):
OBJECTIVES: The purpose of this study was to determine daily noise doses and 8-hour time weighted averages for rock band musicians, crew members, and spectators during a typical rehearsal and performance using both Occupational Safety and Health Administration (OSHA) and National Institute of Occupational Safety and Health (NIOSH) measurement criteria. DESIGN: Personal noise dosimetry was completed on five members of a rock band during one 2-hr rehearsal and one 4-hr performance. Time-weighted averages (TWA) and daily dose values were calculated using both OSHA and NIOSH criteria and compared to industry guidelines for enrollment in hearing conservation programs and the use of hearing protection devices. RESULTS: TWA values ranged from 84.3 to 90.4 dBA (OSHA) and from 90.0 to 96.4 dBA (NIOSH) during the rehearsal. The same values ranged from 91.0 to 99.7 dBA (OSHA) and 94.0 to 102.8 dBA (NIOSH) for the performance. During the rehearsal, daily noise doses ranged from 45.54% to 106.7% (OSHA) and from 317.74% to 1396.07% (NIOSH). During the performance, doses ranged from 114.66% to 382.49% (OSHA) and from 793.31% to 5970.15% (NIOSH). CONCLUSIONS: The musicians in this study were exposed to dangerously high levels of noise and should be enrolled in a hearing conservation programs. Hearing protection devices should be worn, especially during performances. The OSHA measurement criteria yielded values significantly more conservative than those produced by NIOSH criteria. Audiologists should counsel musician-patients about the hazards of excessive noise (music) exposure and how to protect their hearing.
7
Umezurike, G. M. "The effect of glycerol on the activity of β-glucosidase from Botryodiplodia theobromae Pat". Biochemical Journal 254, n. 1 (15 agosto 1988): 73–76. http://dx.doi.org/10.1042/bj2540073.
Testo completoAbstract (sommario):
1. In the activity of the high-Mr beta-glucosidase A (beta-D-glucoside glucohydrolase, EC 3.2.1.21) obtained from culture filtrates of Botryodiplodia theobromae Pat. on o-nitrophenyl beta-D-glucopyranoside as substrate, both Vmax. and Km increased non-linearly with increasing concentration of glycerol, and the Vmax./Km(app.) ratio decreased non-linearly with increasing concentration of glycerol. 2. No increase in rate was observed with phenyl beta-D-glucopyranoside as substrate in the presence of up to 250 mM-glycerol, indicating that glucosylation is rate-limiting with this substrate. 3. With o-nitrophenyl beta-D-glucopyranoside, p-nitrophenyl beta-D-glucopyranoside and phenyl beta-D-glucopyranoside as substrates, kappa cat. values of 793.7 s-1, 62.8 s-1 and 5.4 s-1 respectively were calculated. 4. With o-nitrophenyl beta-D-glucopyranoside and phenyl beta-D-glucopyranoside as substrate, alpha-deuterium kinetic isotope effects of 1.9 +/- 0.03 and 1.01 +/- 0.01 respectively were found; in the presence of 200 mM-glycerol the values were 1.21 +/- 0.03 and 1.02 +/- 0.01 respectively. 5. In the presence of a large excess of o-nitrophenyl beta-D-glucopyranoside [(S] = 35.7 Km), the amount of o-nitrophenol and also of the transglucosylation product formed by beta-glucosidase action increased non-linearly, whereas that of glucose formed decreased non-linearly with increasing glycerol concentration. 6. All these results were found to fit the data calculated from rate equations derived on the basis of the proposed mechanism of enzyme action involving two ion-pair intermediates and a covalent alpha-D-glucosyl-enzyme in the reaction sequence [Umezurike (1987) Biochem. J. 241, 455-462].
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Novik, Y., S. Kunnakkat, B. Donahue, S. Rush, J. Golfinos, E. Parker e A. Narayana. "Role of HER2 status in the treatment of brain metastases arising from breast cancer by stereotactic radiosurgery." Journal of Clinical Oncology 29, n. 27_suppl (20 settembre 2011): 117. http://dx.doi.org/10.1200/jco.2011.29.27_suppl.117.
Testo completoAbstract (sommario):
117 Background: Overexpression of human epidermal growth factor receptor-2 (HER2) in breast cancer has been shown to be an independent risk factor of development of brain metastases (BM). However, the role of HER2 on the radiosensitivity of BM remains controversial. We investigated the efficacy of single fraction stereotactic radiosurgery (SRS) in the treatment of limited BM from breast cancer, based on the HER2 status. Methods: From 2004 to 2010, 57 patients with limited BM were treated with SRS using Leksell Gamma-Knife to a median dose of 20 Gy (range 12-20 Gy) prescribed to the 50% isodose line. The median number of lesions treated were 2 (range 1-7) and the median tumor volume was 92.8 mm3 (range 3.4 -793.7 mm3). There were 27 HER2 positive patients, with 32 ER positive and 22 PR positive patients. Six patients were triple negative. ER/PR information was not available for 4 patients. Overexpression of HER2 was defined as HER2 +++ by immunohistochemistry using the DAKO HercepTest or fluorescent in situ hybridization (FISH) analysis. Time to local recurrence, time to development of new brain metastases, progression-free survival (PFS), and overall survival (OS) were assessed from the date of SRS. Results: With a median follow-up of 11 months (range 1-66 months), 12 patients developed recurrence at the previously treated site (9 HER2 positive patients) and 30 developed new brain metastases (16 HER2 positive patients) The median PFS and OS for all patients were 8 and 16 months respectively. The median PFS for HER2 positive patients compared to HER2 negative patients were 7 and 11 months, respectively (p=0.352). HER2 positive patients had a median OS of 20 months, compared to 14 months in HER2 negative patients (p=0.086). Five patients went on to develop leptomeningeal disease, all of whom were HER2 positive. Conclusions: HER2 overexpression does not increase the risk of recurrence at the site of treatment or appearance of new BM. It does not affect PFS or OS following SRS. However, it remains a risk factor for the development of leptomeningeal disease.
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Senge, Mathias O., Maria da Graça H. Vicente, Sean R. Parkin, Håkon Hope e Kevin M. Smith. "Structural Investigations on Mono- and Di-Acrolein Substituted Ni(II) Porphyrins and a Ni(II) Benzochlorin. Model Compounds for Photosensitizers in Photodynamic Therapy". Zeitschrift für Naturforschung B 47, n. 8 (1 agosto 1992): 1189–202. http://dx.doi.org/10.1515/znb-1992-0822.
Testo completoAbstract (sommario):
The structures of four Ni complexes and a free base related to tetrapentanoporphyrin (TC7P) and octaethylporphyrin (OEP) have been determined by X-ray crystallograpic methods. The Ni(II) complexes exhibit considerable S4-ruffling induced by coordination hole contraction due to the low spin Ni(II). The degree of conformational distortion is enhanced by one or two additional acrolein substituents at the meso positions. The steric strain imposed by interaction of the meso substituent with the neighboring β-pyrrole substituents leads to a significant displacement from the mean plane of the molecule of the meso carbon(s) involved. Increasing non-planarity of the macrocycles is correlated with shifts to longer wavelenghts in the absorption spectra. Ring closures of the acrolein group to afford benzochlorin type pigments results in further bathochromic shifts and a very non-planar molecular conformation. Long wavelength absorbing pigments such as benzochlorins are useful photosensitizers for photodynamic therapy and thus one criterion for a good photosensitizer might be its conformational distortion. Crystal data – 3. C40H46N4 · CH2Cl2, Mr = 667.7, triclinic, P1̄, a = 7.776(5)Å, b = 8.556(4)Â, c = 14.509(8)Å, α = 73.96(1)°, β = 82.04(2)°, γ = 82.58(2)°, V = 914.5(9)Å3, Ζ = 1, Dx = 1.212 Mg/m3, (ΜοΚα) λ = 0.71069Å, μ = 0.209 mm-1, F(000) = 356, 130 Κ, R = 0.082 for 2217 reflections with I > 1.5σ(Ι). Ni4. C44H40N4NiO · CH2Cl2, Mr = 770.4, triclinic, P1̄, a = 11.283(3)Å, b = 11.800(4)Å, c = 15.871(7)Å, α = 79.28(3)°, β = 88.95(2)°, γ = 62.41(1)°, V = 1838.8(11)Å3, Ζ = 2, Dx = 1.391 Mg/m3, (ΜοΚα), μ = 0.715 mm-1, F(000) = 804, 130 Κ, R = 0.072 for 5309 reflections with I > 2.0σ(Ι). Ni5. C46H28N4NiO2 • CH2CH2, Mr = 812.4, triclinic, P1̄, a = 8.959(4)Å, b = 14.420(7)A, c = 15.471(5)Å, α = 102.73(4)°, β = 101.83(4)°, γ = 92.01(5)°, V = 1901.3(14)Å3, Z = 2, Dx = 1.419 Mg/m3, (ΜοΚα), μ = 0.679 mm-1, F(000) = 836, 130 Κ, R = 0.059 for 4197 reflections with I > 1.75σ(Ι). Ni7. C43H45N4NiO2·CH2Cl2, Mr = 793.5, triclinic, P1̄, a = 8.948(3)Å, b = 13.855(3)Å, c = 15.451(3)Å, α = 82.43(2)°, β = 78.79(2)°, γ = 81.24(2)°, V = 1846.7(8)Å3, Z = 2, Dx = 1.427 Mg/m3, (CuKa) λ = 1.54178 Å, μ = 2.448 mm-1, F(000) = 834, 126 K, R = 0.09 for 4039 reflections with I > 2.0σ(Ι). Ni8. C42H48N4NiO, Mr = 683.6, monoclinic, Ρ21/n, a = 15.168(6)Å, b = 14.796(3)Å, c = 15.983(4)Å, β= 97.17(3)°, V = 3552(2)Å3, Z = 4, Dxx = 1.278 Mg/m3, (ΜοΚα), μ = 0.584 mm-1, F(000) = 1456, 130 Κ, R = 0.042 for 5904 reflections with I > 2.5 σ(I).
10
Straková, E., P. Suchý, V. Večerek e L. Máchal. "The variation in amino acid levels in the blood plasma of breeding roosters during sexual maturation*". Archives Animal Breeding 45, n. 3 (10 ottobre 2002): 279–85. http://dx.doi.org/10.5194/aab-45-279-2002.
Testo completoAbstract (sommario):
Abstract. The paper provides an overview of results obtained in the study of variation in free amino acid levels in the blood plasma of breeding roosters (RIR 05 line) during sexual maturation (in the 10th, 15th, 20th and 25th weeks of age). The results prove that dynamic changes in free amino acid concentrations in blood plasma are connected with the sexual maturation of breeding roosters. During this period the concentrations of each particular free amino acid varied at a significance level of P ≤ 0.05 and P ≤ 0.01. Furthermore, in most cases the plasma concentrations of free amino acids in the 10th and 15th week were higher in comparison with those in the 20th and 25th week. Interestingly, the concentrations of individual free amino acids ranged over a wide interval (units, tens and hundreds of μmol/l). In this respect the free amino acids in plasma can be divided into three groups. The first group consisted of amino acids that occurred at low molar concentration (up to 100 μmol/l): cysteic acid, aspartic acid, α-aminoadipic acid, methionine, isoleucine, γ-aminobutyric acid, 3-methylhistidine, tryptophan and ornitine. The second group included amino acids occurring at medium to high molar concentration (100–300 μmol/l): taurine, glutamine, 1/2 cystine, valine, leucine, tyrosine, phenylalanine, histidine, lysine and arginine. Finally, the third group contained threonine, serine, glutamic acid, proline, glycine and alanine that were present at high molar concentrations (above 300 μmol/l). Analyses of plasma in the period from the 10th to 25th week detected dynamic changes in levels of individual free amino acids and showed that the total content of these amino acids gradually decreased to the following mean values: 5 685.00 μmol/l in the 10th week, 5 076.21 μmol/l in the 15th week, 4 384.78 μmol/l in the 20th week and 4 793.30 μmol/l in the 25th week.
Libri sul tema "793.3/2"
1
Tarin, Chaplin L., a cura di. The moment of movement: Dance improvisation. Pittsburgh, Pa: University of Pittsburgh Press, 1988.
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2
Moment of Movement: Dance Improvisation. University of Pittsburgh Press, 2014.
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3
Dance and the Lived Body: A Descriptive Aesthetics. University of Pittsburgh Press, 1996.
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4
Dance and the lived body: A descriptive aesthetics. Pittsburgh, Pa: University of Pittsburgh Press, 1987.
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