Features of gas chromatographic analysis of thermally unstable compounds.

Confirming the stability of analytes during gas chromatographic (GC) analysis is an important criterion, especially for previously uncharacterized compounds. However, the variations of absolute peak areas at different injector temperatures usually do not allow us to reveal the thermal instability of analytes during GC analysis. Such variations may be caused by peak area known discrimination typical for using capillary columns, especially at low split injection.

A new pseudopolymorph of berberine chloride: crystal structure and Hirshfeld surface analysis.

A new pseudopolymorph of berberine, 9,10-dimeth-oxy-5,6-di-hydro-2-7λ-[1,3]dioxolo[4,5-]iso-quinolino-[3,2-]isoquinolin-7-ylium chloride methanol monosolvate, CHNO ·Cl·CHOH, was obtained during co-crystallization of berberine chloride with malonic acid from methanol. The berberine cations form dimers, which are further packed in stacks. The title structure was compared with other reported solvates of berberine chloride: its dihydrate, tetra-hydrate, and ethanol solvate hemihydrate.

Cross-Cultural Comparison of Relationships between Empathy and Implicit Theories of Emotions (in Chinese and Russians).

The current manuscript presents the results of a cross-cultural comparison of the relationships between empathy and implicit theories of emotion in individuals from China and Russia. We hypothesized that the members of the Chinese culture would differ from the more Western Russian participants in terms of relationships between the various components of the emotional domain. Thus, we aimed to identify latent personality profiles while hypothesizing that the Chinese sample would demonstrate more prominent links between empathy and implicit theories regarding the possibility of controlling emotions.

Personality regulation of decisions on physical distancing: Cross-cultural comparison (Russia, Azerbaijan, China).

The present study investigated cross-cultural comparison of the personality variables (rationality, risk readiness, empathy, Dark Triad traits, implicit theories of emotions) in predicting decisions on physical distancing during the COVID-19 pandemic. The sample included 1077 participants from Russia, Azerbaijan, and China. After reporting if they trust the media, participants chose from different reasons why they wear or don't wear a mask: care for self vs others, risk for oneself vs others, autonomy for oneself vs others, risk estimation, law-abidingness; then participants completed questionnaires.

Structural (at 100 K) and DFT studies of 2'-nitro-flavone.

The geometry of the title mol-ecule [systematic name: 2-(2-nitro-phen-yl)-4-chromen-4-one], CHNO, is determined by two dihedral angles formed by the mean plane of phenyl ring with the mean planes of chromone moiety and nitro group, being 50.73 (5) and 30.89 (7)°, respectively.

Relationships Between Medical Doctors' Personality Traits and Their Professional Risk Perception.

Medical decision-making is often related to risk and uncertainty, but existing research does not offer a comprehensive approach to this matter. We discuss the necessity to study cognitive representations of risks (CRRs), which we define as the subject's images of risky situations, possible outcomes, and alternative decisions. The psychometric approach towards risk assessment often involves the evaluation of different risks, but we aim to create such a list from medical professionals' expert knowledge.

The Cross-Cultural Invariance of Creative Cognition: A Case Study of Creative Writing in U.S. and Russian College Students.

Unlike intelligence, creativity has rarely been investigated from the standpoint of cross-cultural invariance of the structure of the instruments used to measure it. In the study reported in this article, we investigated the cross-cultural invariance of expert ratings of creative stories written by undergraduate students from the Russian Federation and the United States. Analyses of differential rater and item functioning using Many-Facet Rasch Measurement and multiple levels of invariance using confirmatory factor analyses suggested partial measurement invariance of creative ability estimates obtained using this method in two cultures.

Syntactic Complexity Effects of Russian Relative Clause Sentences in Children with and without Developmental Language Disorder.

We investigated relative clause (RC) comprehension in 44 Russian-speaking children with typical language (TD) and developmental language disorder (DLD); age = 10.67, = 2.84, and 22 adults.

A simple criterion for gas chromatography/mass spectrometric analysis of thermally unstable compounds, and reassessment of the by-products of alkyl diazoacetate synthesis.

Rationale: A principal limitation of gas chromatography (GC) and gas chromatography/mass spectrometry (GC/MS) is the thermal instability of analytes. We propose that the injector and column temperatures should not exceed the atmospheric pressure boiling point, without decomposition, of the highest homologue of the series being analyzed, instead of the time-consuming procedure of obtaining chromatograms using different temperatures.

Methods: A series of thermally unstable diazocarbonyl compounds, alkyl diazoacetates (predicted limit of stability approx.