Industrial Metabolism Analysis Combined with Value Streams to Identify Potential Economic Risk Nodes

Industrial parks, as focal points of industrial development, benefit from clustering effects such as shared public utilities and centralized waste treatment. Currently, a predominant method to assess these parks involves gauging their material network metabolism, relying solely on this approach without considering the economic aspects; this may distort the overall performance evaluation of the park, failing to address potential economic risks within the industrial network. In this study, the concept of “value stream” is introduced and integrated into the evaluation method of industrial material network metabolism. By monetizing material flows and translating them into value streams, we offer a holistic evaluation of industrial networks. Our findings indicate that from the perspective of a value stream, nodes initially deemed significant might pose considerable economic risks, such as those observed in ethylene-based polyvinyl chloride (PVC), magnesium chloride electrolysis, and acetylene-based PVC. Incorporating a value-stream perspective into the material network metabolism analysis can help in effectively identifying potential economic risks and provide policymakers with evidence-based foresight. This will aid in enhancing the sustainability of industrial parks

Industrial Metabolism Analysis Combined with Value Streams to Identify Potential Economic Risk Nodes

Industrial parks, as focal points of industrial development, benefit from clustering effects such as shared public utilities and centralized waste treatment. Currently, a predominant method to assess these parks involves gauging their material network metabolism, relying solely on this approach without considering the economic aspects; this may distort the overall performance evaluation of the park, failing to address potential economic risks within the industrial network. In this study, the concept of “value stream” is introduced and integrated into the evaluation method of industrial material network metabolism. By monetizing material flows and translating them into value streams, we offer a holistic evaluation of industrial networks. Our findings indicate that from the perspective of a value stream, nodes initially deemed significant might pose considerable economic risks, such as those observed in ethylene-based polyvinyl chloride (PVC), magnesium chloride electrolysis, and acetylene-based PVC. Incorporating a value-stream perspective into the material network metabolism analysis can help in effectively identifying potential economic risks and provide policymakers with evidence-based foresight. This will aid in enhancing the sustainability of industrial parks

Copper-Catalyzed Borylative Cyclization of in Situ Generated <i>o</i>‑Allenylaryl Nitriles with Bis(pinacolato)­diboron

A Cu-catalyzed cascade borylcupration/cyclization of in situ generated allene-nitriles with B₂pin₂ has been developed, which provides highly substituted 3-boryl-1-naphthyl­amines with excellent regioselectivity and wide functional group compatibility. It has been shown that, for the first time, the catalytically generated allylcopper species can be captured by a cyano group from a normal nitrile to furnish a carbocycle

Gold(I)-Catalyzed Cascade Hydroarylation/Cycloaromatization to Indolizines via Pyridine Ring Construction

An efficient and atom-economic method for the synthesis of multisubstituted indolizines via gold-catalyzed cascade hydroarylation/​cycloaromatization reaction of α-(<i>N</i>-pyrrolyl)­ketones with alkynes is described. The reaction is realized through the construction of the pyridine ring of indolizines, which allows the regioselective incorporation of a wide range of functionalities on the pyridine unit

Table_1_Exploring the relationships among music performance anxiety, teaching anxiety, and self-efficacy of Chinese preservice music teachers.docx

This quantitative study aimed to explore the relationships among music performance anxiety (MPA), teacher anxiety (TA), and self-efficacy (SE) through a survey study of Chinese preservice music teachers (N = 237). We also examined gender, grade, primary instrument, secondary instrument, music learning time length, and time spent in four activities: peer teaching, practicum, internship, and private teaching as potential predictors of MPA, TA, and SE. Results indicated that the higher the self-efficacy, the lower music performance anxiety and teaching anxiety; Simultaneously, the increased music performance anxiety was associated with an increased teaching anxiety. Partial correlation results indicated a significant but negative correlation between TA and SE with MPA controlled. Teaching anxiety, followed by primary piano, was the strongest predictor of MPA. MPA, followed by SE and peer teaching, was the strongest predictor of TA. TA, followed by grade level, was the strongest predictor of SE. The results from the multivariate analysis of variance revealed that the SE of male preservice music teachers were significantly higher than their female counterparts. As a study implication, music teacher educators may consider interventions and support mechanisms that address both types of anxiety simultaneously to improve overall teacher preparedness.</p

Facile Synthesis of Fully Substituted Dihydro-β-carbolines via Brønsted Acid Promoted Cascade Reactions of α‑Indolyl Propargylic Alcohols with Nitrones

A straightforward synthesis of fully substituted β-carbolines via Brønsted acid promoted cyclizations of α-indolyl propargylic alcohols with nitrones is described. The use of nitrones bearing alkenyl or electron-rich aryl groups as the R⁴ substituent dramatically switches the reaction pathway to afford tetrasubstituted alkenes and amines, which is assumed to proceed through a rearrangement reaction involving N–O bond cleavage and 1,2-migration of the R⁴ group to an adjacent nitrogen atom

Facile Synthesis of Fully Substituted Dihydro-β-carbolines via Brønsted Acid Promoted Cascade Reactions of α‑Indolyl Propargylic Alcohols with Nitrones

A straightforward synthesis of fully substituted β-carbolines via Brønsted acid promoted cyclizations of α-indolyl propargylic alcohols with nitrones is described. The use of nitrones bearing alkenyl or electron-rich aryl groups as the R⁴ substituent dramatically switches the reaction pathway to afford tetrasubstituted alkenes and amines, which is assumed to proceed through a rearrangement reaction involving N–O bond cleavage and 1,2-migration of the R⁴ group to an adjacent nitrogen atom

Nickel-Catalyzed Highly Regioselective Hydrocyanation of Terminal Alkynes with Zn(CN)₂ Using Water as the Hydrogen Source

The first efficient and general nickel-catalyzed hydrocyanation of terminal alkynes with Zn­(CN)₂ in the presence of water has been developed. The reaction provides a regioselective protocol for the synthesis of functionalized vinyl nitriles with a range of structural diversity under mild reaction conditions while obviating use of the volatile and hazardous reagent of HCN. Deuterium-labeling experiments confirmed the role of water as the hydrogen source in this hydrocyanation reaction

Nickel-Catalyzed Highly Regioselective Hydrocyanation of Terminal Alkynes with Zn(CN)₂ Using Water as the Hydrogen Source

The first efficient and general nickel-catalyzed hydrocyanation of terminal alkynes with Zn­(CN)₂ in the presence of water has been developed. The reaction provides a regioselective protocol for the synthesis of functionalized vinyl nitriles with a range of structural diversity under mild reaction conditions while obviating use of the volatile and hazardous reagent of HCN. Deuterium-labeling experiments confirmed the role of water as the hydrogen source in this hydrocyanation reaction

Copper-Catalyzed Borylative Cyclization of in Situ Generated <i>o</i>‑Allenylaryl Nitriles with Bis(pinacolato)­diboron

A Cu-catalyzed cascade borylcupration/cyclization of in situ generated allene-nitriles with B₂pin₂ has been developed, which provides highly substituted 3-boryl-1-naphthyl­amines with excellent regioselectivity and wide functional group compatibility. It has been shown that, for the first time, the catalytically generated allylcopper species can be captured by a cyano group from a normal nitrile to furnish a carbocycle