Position Of Chain Research Articles

More ESG Practices, Higher Financial Performance? The U‐Shaped Pattern in China's Agricultural and Food Firms

ABSTRACTESG (environmental, social, and governance) practices, an internationally recognized concept of a firm's sustainability, can serve as a bridge to enhance effective communication between firms and various stakeholders. It is also a new tool for measuring firms' value. This study employs a balanced panel data set of 114 publicly traded agricultural and food firms in China from 2016 to 2022. It empirically investigates the relationship between ESG and financial performance based on shareholder primacy theory and stakeholder theory. Employing a two‐way fixed effects (FE) model, our findings reveal a U‐shaped nonlinear pattern in how ESG impacts financial performance. It differs from previous studies that found predominantly positive relationships: Specifically, the average ESG score for firms is 0.396, the median is 0.390, and the inflection point of the U‐shape occurs at 0.53. When firms' ESG investments are less than 0.53, the high initial ESG cost makes it difficult to transform ESG into financial improvement. However, once this threshold is surpassed, good ESG can convey an excellent reputation to the public and increase anti‐risk ability—which, in turn, significantly improves firms' financial performance and facilitates long‐term development. Also, our study demonstrates that firms' ownership and different positions in the supply chain differentially affect the relationship between ESG and financial performance. This paper also offers insights into promoting the sustainable development of Chinese agri‐food firms.

Black powder and mineral deposits in the LPG production and processing line: Analytical study and formation mechanisms

The accumulation of mineral deposits such as black powder causes severe impacts throughout the gas production and transport process. The phenomenon takes place from gas wells to LNG/LPG treatment plants and terminals. The complexity lies in understanding the mechanisms by which these materials are formed in random quantities, as well as their varied nature. The aim of this study is to monitor black powder and other mineral deposits formation in a chain of gas production and processing situated in the south of Algeria and unravel their root causes. To that extent, an analytical study was carried out on four samples of both mineral deposits and black powder taken from an LPG processing and production unit. The adopted analytical approach included an exploration of the textural and structural properties. It also involves a composition characterizations related to the content of metallic elements, moisture, organic and mineral matter. The particle distribution is also determined. The analytical study was conducted using gravimetric determination, XRD, XRF, SEM/EDX and Raman spectroscopy. Particle distribution was given by Laser granulometry technique. The results of the DRX/FRX and EDX characterization primarily revealed that the samples contain a variety of mineral components such as iron oxides; magnetite Fe3O4 and hematite Fe2O3, iron oxy-hydroxide FeO(OH), iron sulphide FeS2, calcite CaCO3, SiO2 and halite NaCl. The presence distribution of these components depends on the location of the sample in gas line. Granulometry study shows that black powder contamination can be spread over a wide spectrum of particle sizes ranging from 1.51 µm to 678.50 µm. This study has allowed to elucidate the nature and distribution of particles deposited at different positions in the LPG production chain and to propose probable mechanisms for their formation.

Reemergence of Hemoglobin Yukuhashi

Abstract The abnormal hemoglobin, Hb Yukuhashi, identified in Japan in 1963, exhibits slower migration compared to Hb A and is associated with target cells on peripheral smear. A similar hemoglobin, Hb Dhofar, is found in an Omani tribesman and is defined as a substitution of arginine for proline at the 58th amino acid position of the beta-globin chain. Despite both Yukuhashi and Dhofar seemingly arising from the same exonic point mutation, variations in expression were clarified through beta-globin gene amplification. Hb Dhofar, unlike Yukuhashi, was linked to a splice-site mutation at codon 29, explaining its reduced expression. Despite these hemoglobins’ structural alterations, their functional properties on a molecular level, including oxygen affinity and heme-heme interaction, remained largely unaffected. While mutations at codon 58 have been observed alongside other mutations in Hb Dhofar and Hb C-Ziguinchor, this case represents the first sequencing and report of a beta-globin gene mutation solely at codon 58, as only Yukuhashi’s protein coding region had been sequenced, not the whole gene. “Hemoglobin D” was detected on newborn screening of a male child with no other significant medical history or physical abnormalities. Capillary Electrophoresis and Cation-Exchange HPLC showed abnormal hemoglobin fractions, with 20.1% in the S Zone and 25.7% in the D-window, respectively. This led to a presumptive diagnosis of Hemoglobin Dhofar trait; however, discrepancies in hematologic parameters and relative hemoglobin levels were noted. Genetic testing of the Beta Globin gene confirmed a C to G substitution at codon 58 but lacked the characteristic codon 29 mutations associated with Hemoglobin Dhofar. The patient, was discovered to possess a mutation at codon 58 on the beta globin gene, a mutation not previously reported in isolation. In contrast to previous studies on Hb Dhofar, where variant Hb levels were lower and accompanied by abnormal RBC indices indicative of beta thalassemia trait, this case exhibited higher variant Hb levels with normal RBC indices, suggestive of a typical beta globin variant. The mutation at codon 58 did not significantly alter intermolecular interactions of the globin which may mean the variant is clinically asymptomatic in nature. Continued follow-up is necessary to confirm this suspicion, although initial assessments at 3 and 6 months of age showed normal RBC parameters. This case represents the first instance of an isolated mutation at codon 58 of the beta globin gene, emphasizing the need to consider this mutation in interpreting hemoglobinopathy screening results.

Vertical Integration versus Open Innovation? From Winner Takes it All to Winners Make it All

This study explores the dynamics between the extremes of open innovation (OI)—from inclusive co-creation to exclusive vertical integration (VI). This analysis addresses the management issues of how Tesla and Porsche manage value capture and value distribution in the e-mobility industry through their contrasting approaches and strategic shifts between OI and VI. It develops a novel theoretical model juxtaposing the OI mode from open to closed with the value chain position from horizontal to vertical. Analyzing Tesla and Porsche’s strategic moves offers a paradigm shift for OI practitioners. Our model can enable enhanced value capture through greater openness and more inclusive value distribution through proactive inside-out strategies in core technology areas. Instead of positioning VI and OI as static polar extremes, a novel combination of VI and OI can realize untapped potential.

Export Spells and the Position of Global Value Chain: Evidence from China’s Industrial Firms

The international division of labor has entered the era of the global value chain (GVC) due to the continuous influence of the scientific and technological revolution. At the same time, sustainable development has taken center stage in the evolution of international trade, and the export spell is an important indicator to measure the sustainable development of export trade. Based on the China customs data, the Chinese industrial enterprises database and the Chinese input-output table from 2000 to 2012, this paper uses the survival analysis method to estimate the enterprises’ export spells and calculate their positions in the GVC through upstreamness. It then investigates the impact of export spells on the position changes of the GVC enterprises. According to the paper, export enterprises near the bottom of the GVC are more vulnerable to extinction. And the duration of enterprises’ export spells has a U-shaped relationship with their positions in the GVC, which means that enterprises will continue to move downstream of the GVC as duration increases, but positions will shift upstream if duration reaches the inflection point. The mechanism test shows that the quality of export products is an important channel through which the duration of enterprises’ export spells influences their GVC positions.

Exploring the impacts of producer services agglomeration on manufacturing carbon emissions: Empirical evidence from China.

This study employs panel data from 30 provinces and cities in China from 2004 to 2019 to empirically estimate the relationship between producer services agglomeration (PSA) and manufacturing carbon emissions. The findings suggest that such agglomeration is beneficial for lowering carbon emissions in manufacturing, and this conclusion passes multiple robustness tests. Heterogeneity analysis results show that PSA in the east and west regions significantly lowers manufacturing carbon emissions, while its impact in the central region is not significant. High-end PSA is beneficial for cutting carbon emissions in manufacturing, but the inhibitory effect of middle- and low-end PSA is not significant. PSA significantly suppresses carbon emissions from capital- and technology-intensive manufacturing, while it has little impact on carbon emissions from labor-intensive manufacturing. Further analysis reveals that PSA has a dual-threshold impact based on absorptive capacity and a single-threshold effect based on infrastructure level on manufacturing carbon emissions. As the absorption capacity crosses the second threshold or the infrastructure level crosses the first threshold, the inhibition effect of PSA on manufacturing carbon emissions begins to become prominent and shows a trend of enhancement. Our research findings provide theoretical and empirical bases for lowering carbon emissions in the manufacturing sector and fostering its ascent to the highest position of the value chain.

Does global value chain participation and position lead to innovation in an emerging economy? Industry-level evidence from Indian manufacturing industries

This study examines the relationship between global value chain (GVC) embeddedness (participation and position) and innovation performance in India using data from the TiVA database for 14 manufacturing industries over the period 2009–2018. To account for the endogeneity issue arising due to reverse causality, the study employs a two-step system GMM. Empirical results show that GVC participation and position both significantly positively affect innovation performance, measured by the number of patent applications filed. However, participation has an inverted U-shaped impact. We contribute to the existing literature by further splitting GVC participation into forward and backward participations and finding that only forward GVC participation significantly impacts an emerging country’s innovation performance. These findings suggest that policymakers in emerging countries should prioritize improving GVC position through increased R&D expenditures rather than relying solely on excessive GVC participation for enhancing innovation.

Environmental and social performance relationships to firm efficiency: Evidence from the semiconductor industry

Escalating global demand for high-performance computing and smart devices has driven rapid expansion in the semiconductor industry. This expansion raises environmental and societal sustainability concerns among stakeholders. Although there is a growing commitment to environmental and social responsibilities by semiconductor companies, the impact of these responsibilities and initiatives on corporate performance remains unclear—especially with respect to general firm operational efficiency. Thus, this study employs a sample of 129 listed Chinese semiconductor companies and a slack-based data envelopment analysis (SBM-DEA) methodology to examine the relationship between corporate environmental and social performance and firm efficiency. We also investigate how supply chain position—an important industrial characteristic—moderates these relationships. The findings reveal that: (1) China's semiconductor industry efficiency is relatively low, particularly in the chip design sub-sector; (2) there is a positive relationship between corporate environmental performance and firm efficiency; and (3) supply chain position moderates the relationship between both corporate environmental and social performance and firm efficiency. These findings offer important implications for managers and researchers aiming to foster greater semiconductor industry sustainable development.

The Impact of Trade Credit on Global Value Chain Position: Evidence from Chinese Manufacturing Firms

ABSTRACT Conventional wisdom argues that a well functioning financial system is essential to foster economic growth and development. While its financial market is still underdeveloped, China has not only achieved great economic growth and speedy export growth, but also elevated its position as an exporter in the global value chain (GVC). This paper examines the impact of trade credit on the GVC positions of Chinese manufacturing enterprises. The empirical study finds that trade credit has a significant promotional effect on enterprises’ GVC positions, and the effect is more pronounced for private firms, firms with high market position, and firms in high-technology industries. The mechanism analysis shows that trade credit heightens the export quality of products and alleviates the financing constraints of enterprises, thus promoting their GVC positions. The findings have implications for Chinese manufacturing firms to exploit the role of trade credit in promoting their GVC positions and fostering new advantages in international competition.

The hemostatic molecular mechanism of Sanguisorbae Radix's pharmacological active components based on HSA: Spectroscopic investigations, molecular docking and dynamics simulation

The interactions between human serum albumin (HSA) and the hemostatic components of the Chinese medicine Sanguisorbae Radix (SR), specifically phenolic acid compounds such as caffeic acid (CA), ferulic acid (FA) and their 1:1 mixture (1:1) were studied to investigate the molecular mechanism underlying the hemostatic effect of SR. Network pharmacology combined with the experimental and computational data revealed that HSA is one of the hemostatic targets to SR phenolic acids. SDS-PAGE and multi-spectroscopy demonstrated that the phenolic acids bind to the Sudlow site I on HSA, altering its structure and influencing its migration velocity. There is an observed synergistic effect upon the mixture of CA and FA. Quantum chemistry, molecular docking, and molecular dynamics simulations indicate that the binding of phenolic acids to HSA is stable, and variations in binding efficiency are associated with the hydrophobicity of the substituent at the C3 position of the side chain, and also, the key amino acids and functional groups for hemostasis of SR were identified, along with the active sites that contribute to the synergistic enhancement by phenolic acids.

Bilateral tax treaties network and global value chain position

This study investigates the effect of bilateral tax treaty (BTT) network centrality on countries’ global value chain (GVC) positions using a panel dataset of 62 economies from 2007 to 2021. Employing an instrumental variable approach, we find that higher BTT network centrality reduces a country's overall GVC position, with heterogeneous effects across sectors and participation types (forward and backward). The results suggest that increased BTT network centrality may facilitate production fragmentation and enable tax planning strategies (treaty shopping), leading to a distortion in the distribution of value-added across countries in GVCs.

Alkyl effects on charge recombination in copper electrolyte-based dye-sensitized solar cells: Insights for targeted molecular design towards high performance

Two quinoxaline dyes utilized in copper-electrolyte-based dye-sensitized solar cells (Cu-DSSCs) are theoretically investigated to analyze the impact of alkyl chains on dye performance. The investigation shows that ZS4, known for its record efficiency of up to 13.2 %, exhibits higher electron coupling and fewer binding sites for dye-[Cu(tmby)2]2+ interaction compared to ZS5. Contrary to common belief, alkyl chains are found to not only provide shielding but also hinder the interaction between dye and [Cu(tmby)2]2+ by influencing the optimal conformation of dyes, thereby impeding the charge recombination process. It is crucial to consider the influence of alkyl chains on dye conformation when discussing the relationship between dye structure and performance, rather than oversimplifying it as often done traditionally. Building on these findings, eight dyes are strategically designed by adjusting the position of the alkyl chain to further decrease charge recombination compared to ZS4. Theoretical evaluation of these dyes reveals that changing the alkyl chain on the nitrogen atom from 2-ethylhexyl (ZS4) to 1-hexylheptyl (D3-2) not only reduces the charge recombination rate but also enhances light harvesting ability. Therefore, D3-2 shows potential as a candidate for experimental synthesis of high-performance Cu-DSSCs with improved efficiency.

The digital trade advantage: investigating the impact on global value chain positions in manufacturing and service industries

ABSTRACT This study investigates the impact of digital trade on global value chain (GVC) positions across industries and countries from 2007–2018. A newly developed digital trade level index measures various dimensions including digital infrastructure, industrial digital trade, e-commerce industrialization, and trade potential. Results show that digital trade significantly enhances GVC positioning, with trade potential having the strongest effect. The study also finds that digital trade drives GVC upgrading by optimizing industrial structures. Developed countries experience greater impacts of digital trade on GVC positions compared to developing nations, highlighting country heterogeneity. Industry differences are also observed, with medium-low tech manufacturing and transportation and warehousing services being most influenced by digital trade. The study uncovers industrial structure upgrading as a key mechanism through which digital trade improves GVC positions, though the industrial digital trade dimension somewhat impedes this effect. Based on these findings, the study provides policy insights for developing countries to harness digital trade for GVC upgrading, such as increasing investments in susceptible industries, fostering domestic and global digital ecosystems, promoting efficient resource allocation, and supporting digital integration in medium-low tech manufacturing.

Export Diversification, Quality and Global Value Chain: A Cross-country Analysis

This paper critically examines the impact of countries’ participation and positions in Global Value Chains (GVCs) on their export diversification and quality for 43 G20 and OECD countries over the period 1990–2015. GMM dynamic panel estimation reveals that deeper GVC integration significantly influences export structures, with countries positioned downstream in the value chain exhibiting more diversified exports (overall and at the intensive margin) but have concentrated exports at the extensive margin and geographically. Conversely, upstream, more factor-based GVC activities tend to result in less diversified export portfolios. Greater GVC participation leads to a more diversified export product basket but more concentrated export destinations in terms of the Hirschman index. However, the association between export diversification and GVC participation varies across measures of diversification and country’s level of economic development. We further find that countries and sectors having larger export share in downstream of the supply chain and have a lower extent of GVC participation, export quality differentiated product. These outcomes suggest that GVC participation and position play crucial roles in shaping national export strategies and economic resilience, with downstream activities offering pathways to enhanced export diversification and quality improvement. The study contributes to the understanding of how global production fragmentation impacts the complexity and sophistication of countries’ export baskets. The outcomes provide guidance for policymakers to strategically leverage GVC engagement to foster export diversification, quality improvement and economic resilience.

Hydrodeuteroalkylation of Unactivated Olefins Using Thianthrenium Salts

AbstractIsotopically labeled alkanes play a crucial role in organic and pharmaceutical chemistry. While some deuterated methylating agents are readily available, the limited accessibility of other deuteroalkyl reagents has hindered the synthesis of corresponding products. In this study, we introduce a nickel‐catalyzed system that facilitates the synthesis of various deuterium‐labeled alkanes through the hydrodeuteroalkylation of d2‐labeled alkyl TT salts with unactivated alkenes. Diverging from traditional deuterated alkyl reagents, alkyl thianthrenium (TT) salts can effectively and selectively introduce deuterium at α position of alkyl chains using D2O as the deuterium source via a single‐step pH‐dependent hydrogen isotope exchange (HIE). Our method allows for high deuterium incorporation, and offers precise control over the site of deuterium insertion within an alkyl chain. This technique proves to be invaluable for the synthesis of various deuterium‐labeled compounds, especially those of pharmaceutical relevance.

Hydrodeuteroalkylation of Unactivated Olefins Using Thianthrenium Salts.

Isotopically labeled alkanes play a crucial role in organic and pharmaceutical chemistry. While some deuterated methylating agents are readily available, the limited accessibility of other deuteroalkyl reagents has hindered the synthesis of corresponding products. In this study, we introduce a nickel-catalyzed system that facilitates the synthesis of various deuterium-labeled alkanes through the hydrodeuteroalkylation of d2-labeled alkyl TT salts with unactivated alkenes. Diverging from traditional deuterated alkyl reagents, alkyl thianthrenium (TT) salts can effectively and selectively introduce deuterium at α position of alkyl chains using D2O as the deuterium source via a single-step pH-dependent hydrogen isotope exchange (HIE). Our method allows for high deuterium incorporation, and offers precise control over the site of deuterium insertion within an alkyl chain. This technique proves to be invaluable for the synthesis of various deuterium-labeled compounds, especially those of pharmaceutical relevance.

Input Subsidies and Women Entrepreneurship: Evidence from Tanzania

ABSTRACT In many parts of the world, women face barriers to accessing improved agricultural inputs. In Tanzania, a program called the National Agricultural Input Voucher Scheme (NAIVS) was implemented from 2008 to 2014 to provide smallholder farmers with vouchers to purchase inputs at a subsidized price, with the goal of improving productivity and increasing income and food security. Using data from the Tanzania Living Standards Measurement Study panel, we analyzed the effects of NAIVS on female-headed households’ market participation, sales, and profitability. The analysis showed that NAIVS increased market participation of female-headed households by 11%, particularly in downstream positions in domestic value chains. However, there were no discernible effects on sales and profitability, indicating that although the program reduced input costs, production costs remained high enough to offset the efficiency gains from the subsidized inputs.

The Impact of Digital Technology Innovation on the Supply Chain Position: Micro Evidence from the Chinese New Energy Vehicle Companies

The Impact of Digital Technology Innovation on the Supply Chain Position: Micro Evidence from the Chinese New Energy Vehicle Companies

Effects of branched-chain amino acids on surfactin structure and antibacterial activity in Bacillus velezensis YA215.

Antibiotics are essential for combating pathogens; however, their misuse has led to increased resistance, necessitating the search for effective, low-toxicity alternatives. Surfactin, a cyclic lipopeptide with a C12-C17 β-hydroxy fatty acid chain, exhibits significant antibacterial activity and resists resistance, making it a research focus. Nonetheless, the effects of branched-chain amino acids (BCAAs) on surfactin's structure and activity are not well understood. This study examines the influence of BCAAs (L-valine, L-leucine, and L-isoleucine) on the lipopeptide (surfactin) produced by Bacillus velezensis YA215. Process optimization shows that adding 1g/L of L-Leu and L-Ile, and 0.5g/L of L-Val, maximized surfactin production to 18.59%, 19.23%, and 20.64%, respectively. Surfactin content peaked at 36h with L-Val and L-Ile, yielding 19.72% and 11.37%. In contrast, L-Leu addition peaked at 24h, yielding 11.33%. Notably, L-Val supplementation resulted in the highest relative surfactin content. Antimicrobial testing demonstrated that BCAAs significantly enhance the antibacterial effects of lipopeptides against Escherichia coli and Staphylococcus aureus, with Val showing the most pronounced effect. The addition of BCAAs notably altered the composition of surfactin fatty acid chains. Specifically, Val increased the proportions of iso C14 and iso C16 β-hydroxy fatty acids from 13.3% and 4.216-23.803% and 8.31%, respectively. Additionally, the amino acid composition at the 7th position of the peptide chain changed significantly, especially with Val addition, which increased the proportion of C14 [Val 7] surfactin by 3.29 times. These structural changes are likely associated with the enhanced antibacterial activity of surfactin. These findings provide valuable insights into the roles of BCAAs in microbial fermentation, underscoring their importance in metabolic engineering to enhance the production of bioactive compounds.

Effects of structural changes of PPO and PEO of nonionic surfactants on oil–water interface properties: A molecular dynamics simulation study

The rapid progress of chemical flooding in recent years has imposed increasingly higher demands on the interface properties of surfactants. In this study, through analysis of interface properties, we investigated the influence of chain length and position of PO and EO chains on the surface activity of surfactants. It was observed that when the chain length was 10, both PO and EO chains exhibited the lowest interfacial tension. Principal component analysis was employed to reduce dimensionality for Rg (radius of gyration), tilt angle, and hydrogen bond parameters. Ultimately, it was found that Rg-PO, Rg-EO, and H-bond exerted significant influence on interfacial tension with decreasing weights successively. The correlation between tilt angle and its impact on interfacial tension was lower compared to these three factors mentioned above. Therefore, when designing surfactant structures, it is crucial to reasonably match the lengths of PO and EO chains.