Site Group to Factor Group Correlation Tables

2015 ◽  
pp. 515-525 ◽  
Keyword(s):  
Factor Group ◽  
Site Group ◽  
Correlation Tables

Vibrational spectra of metal-nitro complexes. II. Substituted halo complexes of platinum(IV)

1973 ◽  
Vol 26 (7) ◽  
pp. 1413 ◽  
Author(s):  
MJ Nolan ◽  
DW James
Keyword(s):  
Raman Spectra ◽  
Point Group ◽  
Factor Group ◽  
Group Symmetry ◽  
Infrared And Raman Spectra ◽  
Point Group Symmetry ◽  
Nitro Complexes ◽  
Site Group ◽  
Group Symmetries ◽  
Complex Ion

The infrared and Raman spectra of compounds forming the series given by [Pt(NO2)6-nCln]2- (n = 0-5) together with some of the analogous bromo and iodo compounds have been obtained. Most compounds were studied in the solid state, but the Raman spectra of solutions of some of the compounds were also obtained. The spectra were interpreted initially by considering the likely point group symmetry of the complex ion. Where details of the crystal structures were known, the site group and factor group symmetries were also considered.

scholarly journals IR-Spektren kristalliner, wasserfreier Permanganate, Pertechnetate und Perrhenate

1966 ◽  
Vol 21 (1) ◽  
pp. 3-7 ◽  
Author(s):  
Achim Müller ◽  
Bernt Krebs
Keyword(s):  
Ir Spectra ◽  
Crystal Field ◽  
Infrared Absorption ◽  
Group Analysis ◽  
Factor Group ◽  
Site Group ◽  
Absorption Frequencies

The infrared absorption frequencies in the region of the MeO4⊖ fundamental vibrations are reported for several crystalline permanganates, pertechnetates, and perrhenates. On the basis of the IR spectra of the crystals and of additional considerations correct frequencies are assigned to the ν2(E) vibrations of the MeO4⊖ tetrahedra. The influence of the crystal field on the fundamental vibrations of the MnO4⊖, TcO4⊖, and ReO4⊖ ions is discussed, using site group analysis and factor group considerations.

Infrared study of goethites of varying crystallinity and particle size: I. Interpretation of OH and lattice vibration frequencies

Clay Minerals ◽  
1986 ◽  
Vol 21 (2) ◽  
pp. 191-200 ◽  
Author(s):  
P. Cambier
Keyword(s):  
Particle Size ◽  
High Frequency ◽  
Lattice Vibration ◽  
Low Frequency ◽  
Factor Group ◽  
Active Components ◽  
Infrared Study ◽  
Site Group ◽  
Stretching Vibrations ◽  
Bending Modes

AbstractA detailed study of the IR spectrum of goethite is given with the aim of relating variations to crystalline order and particle size. The OH stretching vibrations are split into two active components at high frequency, plus two inactive ones at low frequency. Two different bending modes exist from site group splitting. Their active modes from factor group splitting are at lower frequencies than the uncoupled ones. The lattice bands at 630 and 400 cm−1 correspond to Fe-O or Fe-OH stretching, approximately parallel to a and c, and thus respectively sensitive and not sensitive to the particle shape, as long as it remains elongated along c.

Infrared absorption spectra of Ag3[PO4, VO4] mixed crystals

1979 ◽  
Vol 44 (3) ◽  
pp. 823-828 ◽  
Author(s):  
Bohumil Hájek ◽  
Alexander Muck ◽  
Olga Smrčková
Keyword(s):  
Mixed Crystal ◽  
Group Analysis ◽  
Factor Group ◽  
Mixed Crystals ◽  
Site Symmetry ◽  
Lattice Vibrations ◽  
Concentration Region ◽  
Site Group ◽  
Infrared Absorption Spectra ◽  
Effective Site

Ag3[PO4, VO4] mixed crystals were prepared in the whole concentration region. For 0-40 mol % vanadate, the mixed crystals are isostructural with the low-temperature modification of Ag3PO4 (Td4, Z = 2); the site group and factor group analysis was performed for this space group. Mixed crystals containing 60% vanadate and more are tetragonal with the structure of Ag3VO4. From the analysis of the infrared spectra it follows that in the cubic mixed crystal with 40 mol % Ag3VO4, the site symmetry T is additionally lowered to the effective site symmetry C3 due to the effect of the lattice vibrations of the types T(F) and R(F).

A study of mixed crystals in the InPO4-InVO4 system and their infrared spectra

1985 ◽  
Vol 50 (7) ◽  
pp. 1465-1469 ◽  
Author(s):  
Bohumil Hájek ◽  
Alexander Muck ◽  
Eva Šantavá
Keyword(s):  
Infrared Spectra ◽  
Factor Group ◽  
Mixed Crystals ◽  
Crystal Symmetry ◽  
Group Approach ◽  
Orthorhombic System ◽  
Site Group

The crystal symmetry was studied for mixed crystals in the InPO4-InVO4 orthorhombic system. The infrared spectra were examined using the site group and factor group approach, and the Td → Cs → C2v correlation was found more appropriate than the Td → C2v → D2h correlation.

A contribution to the identification in fuzzy-logic control

1990 ◽  
Vol 55 (4) ◽  
pp. 951-963 ◽  
Author(s):  
Josef Vrba ◽  
Ywetta Purová
Keyword(s):  
Time Series ◽  
Fuzzy Logic ◽  
Fuzzy Logic Control ◽  
Fuzzy Logic Controller ◽  
Automatic Generation ◽  
Linguistic Variable ◽  
Fuzzy Subset ◽  
Input Output ◽  
Logic Control ◽  
Correlation Tables

A linguistic identification of a system controlled by a fuzzy-logic controller is presented. The information about the behaviour of the system, concentrated in time-series, is analyzed from the point of its description by linguistic variable and fuzzy subset as its quantifier. The partial input/output relation and its strength is expressed by a sort of correlation tables and coefficients. The principles of automatic generation of model statements are presented as well.

scholarly journals Antidepressant effect of repetitive transcranial magnetic stimulation is not impaired by intake of lithium or antiepileptic drugs

2021 ◽  
Author(s):  
T. Hebel ◽  
M. A. Abdelnaim ◽  
M. Deppe ◽  
P. M. Kreuzer ◽  
A. Mohonko ◽  
...  
Keyword(s):  
Valproic Acid ◽  
Transcranial Magnetic Stimulation ◽  
Antiepileptic Drugs ◽  
Magnetic Stimulation ◽  
Repetitive Transcranial Magnetic Stimulation ◽  
Factor Group ◽  
Mood Stabilizers ◽  
Motor Threshold ◽  
Chi Square ◽  
Resting Motor Threshold

Abstract Introduction The effect of concomitant medication on repetitive transcranial magnetic stimulation (rTMS) outcomes in depression remains understudied. Recent analyses show attenuation of rTMS effects by antipsychotic medication and benzodiazepines, but data on the effects of antiepileptic drugs and lithium used as mood stabilizers or augmenting agents are sparse despite clinical relevance. Preclinical electrophysiological studies suggest relevant impact of the medication on treatment, but this might not translate into clinical practice. We aimed to investigate the role of lithium (Li), lamotrigine (LTG) and valproic acid (VPA) by analyzing rTMS treatment outcomes in depressed patients. Methods 299 patients with uni- and bipolar depression treated with rTMS were selected for analysis in respect to intake of lithium, lamotrigine and valproic acid. The majority (n = 251) were treated with high-frequency (10–20 Hz) rTMS of the lDLPFC for an average of 17 treatment sessions with a figure-of-8 coil with a MagVenture system aiming for 110% resting motor threshold, and smaller groups of patients were being treated with other protocols including intermittent theta-burst stimulation and bilateral prefrontal and medial prefrontal protocols. For group comparisons, we used analysis of variance with the between-subjects factor group or Chi-Square Test of Independence depending on the scales of measurement. For post-hoc tests, we used least significant difference (LSD). For differences in treatment effects between groups, we used an ANOVA with the between-subjects factor group (groups: no mood stabilizer, Li, LTG, VPA, Li + LTG) the within-subjects factor treatment (pre vs. post treatment with rTMS) and also Chi-Square Tests of independence for response and remission. Results Overall, patients showed an amelioration of symptoms with no significant differences for the main effect of group and for the interaction effect treatment by group. Based on direct comparisons between the single groups taking mood stabilizers against the group taking no mood stabilizers, we see a superior effect of lamotrigine, valproic acid and combination of lithium and lamotrigine for the response and remission rates. Motor threshold was significantly and markedly higher for patients taking valproic acid. Conclusion Being treated with lithium, lamotrigine and valproic acid had no relevant influence on rTMS treatment outcome. The results suggest there is no reason for clinicians to withhold or withdraw these types of medication from patients who are about to undergo a course of rTMS. Prospective controlled work on the subject is encouraged.

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