One-step System Research Articles

Comparison of a two-step Tempus600 hub solution single-tube vs. container-based, one-step pneumatic transport system.

Efficient and timely transportation of clinical samples is pivotal to ensure accurate diagnoses and effective patient care. During the transportation process, preservation of sample integrity is crucial to avoid pre-analytical aberrations on laboratory results. Here, we present a comparative analysis between a two-step Tempus600 hub solution single-tube and a one-step, container-based pneumatic transport system (PTS) from Airco, for the in-house transportation of blood samples. Ten blood samples from healthy volunteers were split in 10 mL collection tubes filled at full or half capacity for transportation with the two PTS (about 250 m). To compare the impact of transportation, markers of hemolysis such as lactate dehydrogenase (LDH), potassium (K+), and the hemolysis index (HI), were determined. Additionally, differences in HI in routine samples and repeated transportation was investigated. To assess and compare the mechanistic impact profiles, we recorded the acceleration profiles of the two PTS using a shock data logger. Transportation using the Tempus600 hub solution resulted in 49 and 46 % higher HI with samples filled to total or half capacity, respectively. Routine samples transported with the Tempus600 hub solution showed a higher median HI by 23 and 33 %. Additionally, shock logger analysis showed an elevated amount of shocks (6.5 fold) and shock intensities (1.8 fold). The Tempus600 hub solution caused an increased number of unreportable LDH or K+ results based on the hemolysis index. However, it was only statistically significant for LDH (p<0.01 and p<0.08)- while the comparisons for K+ were not statistically significant (p<0.28 and p<0.56).

The power of financial literacy: paving a clear path for the influence of board diversity on intellectual capital disclosure

PurposeUtilizing a multi-theoretical framework, this study aims to investigate the impact of board gender and nationality diversity on the extent of intellectual capital disclosure. Additionally, it seeks to explore the moderating role of financial literacy among audit committee members on the aforementioned relationship.Design/methodology/approachTo empirically test the study’s framework, a panel dataset of listed firms on the Palestine Stock Exchange (PEX) spanning 12 years (2010–2022) was utilized. To address potential endogeneity issues and ensure robust findings, a battery of econometric estimators was employed, including ordinary least squares (OLS), one-step system generalized method of moments (GMM), lagged independent variables and a sub-index model.FindingsThe study findings make a significant contribution to existing intellectual capital literature. Specifically, the results reveal that the positive influence of board gender and nationality diversity on the extent of corporate intellectual capital disclosure is stronger when there is a high proportion of audit committee financial literacy. Additionally, the study distinguishes between overall index and sub-index analyses. Interestingly, the findings from the sub-index analysis, focusing on structural capital, relational capital and human capital, are somewhat similar to the results of the full index analysis.Originality/valueTo the best of the authors’ knowledge, this study represents the first empirical attempt to uncover the impact of financial literacy among audit committee members on the relationship between board diversity and intellectual capital disclosure.

Direct conversion of human umbilical cord mesenchymal stem cells into dopaminergic neurons for Parkinson's disease treatment

Parkinson's disease (PD) is a neurodegenerative disorder characterized by motor deficits due to the depletion of nigrostriatal dopamine. Stem cell differentiation therapy emerges as a promising treatment option for sustained symptom relief. In this study, we successfully developed a one-step differentiation system using the YFBP cocktail (Y27632, Forskolin, SB431542, and SP600125) to effectively convert human umbilical cord mesenchymal stem cells (hUCMSCs) into dopaminergic neurons without genetic modification. This approach addresses the challenge of rapidly and safely generating functional neurons on a large scale. After a 7-day induction period, over 80 % of the cells were double-positive for TUBB3 and NEUN. Transcriptome analysis revealed the dual roles of the cocktail in inducing fate erasure in mesenchymal stem cells and activating the neuronal program. Notably, these chemically induced cells (CiNs) did not express HLA class II genes, preserving their immune-privileged status. Further study indicated that YFBP significantly downregulated p53 signaling and accelerated the differentiation process when Pifithrin-α, a p53 signaling inhibitor, was applied. Additionally, Wnt/β-catenin signaling was transiently activated within one day, but the prolonged activation hindered the neuronal differentiation of hUCMSCs. Upon transplantation into the striatum of mice, CiNs survived well and tested positive for dopaminergic neuron markers. They exhibited typical action potentials and sodium and potassium ion channel activity, demonstrating neuronal electrophysiological activity. Furthermore, CiNs treatment significantly increased the number of tyrosine hydroxylase-positive cells and the concentration of dopamine in the striatum, effectively ameliorating movement disorders in PD mice. Overall, our study provides a secure and reliable framework for cell replacement therapy for Parkinson's disease.

One-step cascade amplification system based on entropy-driven catalysis and DNAzyme triggered DNA walker for label-free detection of acetamiprid

Herein, an electrochemical aptasensor for highly sensitive detection of acetamiprid (ACE) was constructed based on a one-step cascade amplification strategy. This innovative strategy integrated DNA walker containing DNAzyme sequence into entropy-driven catalysis (EDC) system. The trigger strand was released by aptamer-specific binding to ACE, initiating the EDC amplification circuit and delivering DNA walker strands. The dangling DNA walker continuously bound and cleaved hairpin substrate to form G-quadruplex fragments with the assistance of Mg2+. The G-quadruplex fragments folded and captured hemin to form multitudinous G-quadruplex/hemin complexes in the presence of K+, generating significantly enhanced current, enabling enzyme-free, label-free and highly sensitive detection of ACE, with a linear detection range of 100 fM to 50 nM and a detection limit of 68.36 fM (S/N = 3). The constructed aptasensor achieved the reliable detection of ACE in vegetable soil and cucumber samples, demonstrating its potential application prospects in environmental protection and food supervision.

Monocentric evaluation of the Novaplex dermatophyte multiplex qPCR assay in the diagnosis of dermatophytoses.

Superficial fungal infections caused by dermatophytes are a prevalent global health concern. Rapid and accurate diagnosis of these pathogens through molecular tools would offer a substantial advantage for early detection and effective treatment. The conventional fungal culture presents inherent limitations, including extended result delivery delay and variable sensitivity. This study aimed to evaluate the performance of the multiplex real-time PCR Novaplex dermatophyte assay (Seegene) in comparison to traditional mycological methods including direct examination and culture. A total of 312 nail, skin, and scalp samples collected from patients with suspected superficial fungal infections for mycological diagnosis were retrospectively subjected to the Novaplex dermatophyte assay. Overall, 170 (54.6%) and 186 (59.6%) samples tested positive for dermatophyte culture and dermatophyte PCR, respectively. The concordance between PCR and culture for dermatophyte detection was 87.2%. There were 158 culture-positive/PCR-positive samples, 12 culture-positive/PCR-negative samples, and 28 culture-negative/PCR-positive samples. The sensitivity of PCR against culture varied according to the dermatophyte target, ranging from 90.5% (Trichophyton mentagrophytes/interdigitale/benhamiae), 91.2% (Trichophyton rubrum), to 100% (Microsporum spp. and Trichophyton tonsurans). When considering the final diagnosis using composite criteria, the sensitivity and specificity for the diagnosis of dermatophytosis were 92.9% and 96.6% for PCR, 86.7% and 100% for culture, and 95.4% and 92.2% for direct examination and culture combined, respectively. The Seegene Novaplex dermatophyte assay is an easy-to-use automated one-step extraction-PCR system that offers satisfactory performance for routine diagnosis of dermatophytoses in clinical laboratories, particularly in non-specialized centers. However, it cannot fully replace conventional mycology due to its inability to detect mold infections and to identify dermatophytes at the species level.

Does corporate green innovation unlock financial doors? The mediating role of environmental performance

Purpose This study aims to respond to the latest research calls to precisely revisit the nexus between corporate green innovation (CGI) and financial decisions through deeply investigating the mediating effect of corporate environmental performance measured by the effectiveness of emission reduction. Design/methodology/approach This study analyzes nonfinancial-listed firms on the Australian Securities Exchange from 2002 to 2019 using multiple regression analysis on a panel data set. Initially, different static panel data approaches were used. To account for the potential endogeneity issue and generate robust outcomes, the authors apply the one-step system generalized method of moment, two-stage least squares and lagged model approaches. Findings The results provide a clear indication that the practices of green innovation can favorably contribute to the level of environmental performance, which in turn affect the firm’s ability in opening the new financial doors and shape solid capital structure. In this context, the effective environmental performance fully mediates the nexus between CGI and capital structure of a firm. More importantly, the outcomes are robust and coherent across different estimation techniques. Originality/value The originality of this study lies in its utilization of mediation analysis to explore the relationship between CGI and a firm's financial structure. This approach distinguishes it from previous research by offering a thorough and nuanced understanding of how green innovation practices influence the financing decisions of a firm.

Does official development assistance (ODA) cause the Dutch disease in developing countries

PurposeThis paper aims to investigate whether official development assistance (ODA) inflows to developing countries (lower-middle and low income) can cause the symptoms of Dutch disease or not.Design/methodology/approachThis study applies the methodology of dynamic panel data estimation with a one-step system generalized methods of moment (GMM) for the sample of 59 developing countries from 2001 to 2019.FindingsThe results indicate that ODA (as a percentage of gross domestic product (GDP)) rises by 1%, the real effective exchange rate (REER) appreciates by 0.252%. This finding reveals that these selected developing countries have faced the symptoms of Dutch disease. The countries with the higher ODA ratio have a higher effect of the Dutch disease, and the managed floating exchange rate regime is the lowest impacted, when compared to the fixed and flexible exchange rate.Practical implicationsThe selected countries are recommended to use ODA inflows right and efficiently. These ODA inflows should be invested in productive sectors or support for production rather than in consumption. The managed float exchange rate regime is applied to reduce the symptom of Dutch disease for the selected countries. The good cooperation of monetary and fiscal policies is important to absorb the huge ODA inflow and sterilize the adverse effects of the disease.Originality/valueThe paper contributes to the literature and empirical of the Dutch disease. An adverse effect of the huge ODA inflow to the developing countries appreciated of the real exchange rate and caused the symptom of the dutch disease.Peer reviewThe peer review history for this article is available at: https://publons.com/publon/10.1108/IJSE-12-2022-0777

Coaxial Bioprinting of Enzymatically Crosslinkable Hyaluronic Acid-Tyramine Bioinks for Tissue Regeneration.

Three-dimensional (3D) bioprinting has emerged as an important technique for fabricating tissue constructs with precise structural and compositional control. However, developing suitable bioinks with biocompatible crosslinking mechanisms remains a significant challenge. This study investigates extrusion-based bioprinting (EBB) using uniaxial or coaxial nozzles with enzymatic crosslinking (EC) to produce 3D tissue constructs in vitro. Initially, low-molecular-weight dextran-tyramine and hyaluronic acid-tyramine (LMW Dex-TA/HA-TA) bioink prepolymers were evaluated. Enzymatically pre-crosslinking these prepolymers, achieved by the addition of horseradish peroxidase and hydrogen peroxide, produced viscous polymer solutions. However, this approach resulted in inconsistent bioprinting outcomes (uniaxial) due to inhomogeneous crosslinking, leading to irreproducible properties and suboptimal shear recovery behavior of the hydrogel inks. To address these challenges, we explored a one-step coaxial bioprinting system consisting of enzymatically crosslinkable high-molecular-weight hyaluronic acid-tyramine conjugates (HMW HA-TA) mixed with horseradish peroxidase (HRP) in the inner core and a mixture of Pluronic F127 and hydrogen peroxide in the outer shell. This configuration resulted in nearly instantaneous gelation by diffusion of the hydrogen peroxide into the core. Stable hydrogel fibers with desirable properties, including appropriate swelling ratios and controlled degradation rates, were obtained. The optimized bioink and printing parameters included 1.3% w/v HMW HA-TA and 5.5 U/mL HRP (bioink, inner core), and 27.5% w/v Pluronic F127 and 0.1% H2O2 (sacrificial ink, outer shell). Additionally, optimal pressures for the inner core and outer shell were 45 and 80 kPa, combined with a printing speed of 300 mm/min and a bed temperature of 30 °C. The extruded HMW HA-TA core filaments, containing bovine primary chondrocytes (BPCs) or 3T3 fibroblasts (3T3 Fs), exhibited good cell viabilities and were successfully cultured for up to seven days. This study serves as a proof-of-concept for the one-step generation of core filaments using a rapidly gelling bioink with an enzymatic crosslinking mechanism, and a coaxial bioprinter nozzle system. The results demonstrate significant potential for developing designed, printed, and organized 3D tissue fiber constructs.

Understanding the aftermath of banks merger: analyzing price effects on public sector banks since the COVID-19 pandemic

PurposeThe current study immerses in the realm of bank mergers among prominent PSBs in India, focusing on the financial performance of six recently merged PSBs entities. Amidst the global impact of the COVID-19 pandemic on economies, the study aims to uncover the efficiency of these PSBs in navigating this unprecedented crisis.Design/methodology/approachThe evaluation encompasses panel data on an annual basis spanning from 2020 to 2023. To assess the overall efficiency of merged PSBs, the advanced statistical technique like one-step system generalized method of moments has been applied to estimate its efficiency.FindingsThe study findings affirm that PSB mergers have bolstered financial metrics and efficiency. Enhanced return on equity (ROA) and net profit margin (NPM) signify improved profitability and efficiency. The consolidation also facilitates better asset management and utilization. Moreover, merged entities benefit from economies of scale, cost efficiencies, risk diversification, technological investments, and overall performance improvements.Practical implicationsThe study's policy suggestions stress ongoing consolidation efforts to boost banking sector resilience, advocating for improved efficiency, governance, and asset quality management. These steps are crucial for successful bank mergers and fostering a robust, competitive banking landscape in India.Originality/valueThis study is a novel attempt to analyze Indian bank profitability and efficiency post PSB mergers amid COVID-19 pandemic. In a developing country like India, especially in PSBs has experienced significant structural changes over the previous 7 years just before pandemic, such a study necessitates a prompt empirical investigation.

Strong absorption of silica over full solar spectrum boosted by interfacial junctions and light–heat–storage of Mg(OH)2–(CrOx–SiO2)

Strong absorption of near-infrared (NIR) light is essential for efficient solar energy applications. NIR absorption primarily depends on the surface plasmon resonance of incident light with free charge carriers (FCCs). We demonstrated that S-scheme interfacial junctions (IJs) can substantially enhance FCC density, light-harvesting, photocurrent intensity, long lifetime of the charge carriers and photothermal effects, paving a way for novel light-material design. Abundant S–scheme IJs are constructed in CrOx–SiO2 nanoparticles, which increase the FCCs outstandingly and enhance light absorption exceptionally over the entire solar spectrum. IJs’ construction enables silica to harvest solar energy strongly. Doped with multifunctional CrOx–SiO2 nanoparticles, the photothermal-dehydration conversion and the stored heat of Mg(OH)2 can be improved by 7.0- and 5.1-times upon 30-min irradiation, respectively. The reversibility of the photothermal charge–discharge cycles of Mg(OH)2 improves 19.3 times. The thermal-storage kinetics is substantially improved owing to the reduction of the dehydration activation energy (−15.2 %). Mg(OH)2–CrOx–SiO2 composite is an excellent one-step system of light–heat–storage.

Estrutura de propriedade, divulgação social, ambiental e de governança, e assimetria de informação: o caso brasileiro

This research aimed to analyze the moderating effects of ownership structure on the relationship between environmental, social, and governance (ESG) disclosure and information asymmetry in Brazilian companies. A quantitative, descriptive, and documentary study was conducted with data from 68 companies listed on the Bolsa Brasil Balcão (B3) between 2015 and 2022, tested using the one-step GMM dynamic panel system. The main findings indicate that ESG disclosure can reduce information asymmetry, while ownership concentration and institutional ownership have a positive moderating effect on this relationship. The study emphasizes the need for regulatory actions to address potential issues faced by less informed investors and improve the disclosure of ESG practices.

A multiplex RT-qPCR assay for simultaneous detection of cucurbit viruses from individual whitefly and plant samples.

Whiteflies (Bemisia tabaci) are a significant pest of cucurbits and vectors many viruses leading to substantial economic losses. Modern diagnostic tools offer the potential for early detection of viruses in the whiteflies before crop production. One such tool is the multiplex reverse transcriptase quantitative PCR (RT-qPCR) probe-based technique, which can detect multiple targets in a single reaction and simultaneously quantify the levels of each target, with a detection limit of 100 copies per target. In this study, a multiplex RT-qPCR-based detection system capable of identifying one DNA virus and three RNA viruses in whiteflies: cucurbit leaf crumple virus (CuLCrV), cucurbit chlorotic yellows virus (CCYV), cucurbit yellow stunting disorder virus (CYSDV), and squash vein yellowing virus (SqVYV) was developed. To ensure the reliability of the assay, an internal gene control as the fifth target to monitor false-negative results was incorporated. This newly developed molecular diagnostic tool possesses several advantages. It can detect up to five desired targets from a single whitefly RNA sample, even at concentrations as low as 1 ng/µl. To evaluate its sensitivity, we conducted experiments using serially diluted cloned plasmids and in vitro transcribed RNA transcripts of the target viruses. We also assessed the specificity of the assay by including aphid-transmitted viruses and other viruses known to infect cucurbits. The diagnostic method successfully detected all five targets simultaneously and allowed for the quantification of up to 100 copies using a mixture of healthy? RNA and in vitro transcribed RNA. Our aim with this study was to develop a highly specific and sensitive one-step multiplex RT-qPCR system for the simultaneous detection of viruses transmitted by whiteflies in cucurbits. This system offers significant advantages for early detection, enabling prompt control measures to mitigate the further spread of viral infections and reduce yield losses. Additionally, we demonstrated the ability to simultaneously detect mixed viruses (CCYV, CYSDV, CuLCrV, and SqVYV) in individual whiteflies and quantify the number of viral copies carried by each whitefly. The multiplex RT-qPCR assay outperforms currently available techniques for detecting many samples at a given time and can be effectively utilized for early monitoring of plant viruses in individual whiteflies and symptomless plants.

Are natural resources, sustainable growth and entrepreneurship matter endogenous growth theory? The strategic role of technical progress

The increasing environmental degradation is a major obstacle, despite the fact that the world has done a good job of dealing with sustainable development recently. This research sets out to fill that gap by examining 38 Asian economies from 2000 to 2021 in an effort to identify the novel factors that will determine sustainable growth. Progress in technology, availability of raw materials, technological advancement, and entrepreneurship are some of the factors that determine this. Similar to previous empirical research, this study's aims are investigated using the following tests: system GMM, quantile GMM, GMM, two-stage system, and one-step system GMM. Nonetheless, the results of the study show that technological innovation, gross capital creation, and the domestic labor force all contribute positively to economic development. In a similar vein, the endogenous growth hypothesis predicts that when economies develop rapidly, their use of natural resources would decrease. Additionally, some economies see a rise in growth when they engage in entrepreneurial activity and use renewable energy sources. This report also recommends some viable approaches for Asian countries to achieve fast development through the management of natural resources.

One-step reverse transcriptase-free miRNA detection system and its application for detection of gastrointestinal cancers

MicroRNAs (miRNAs) play pivotal roles in gene regulation and their dysregulation is implicated in various diseases, including cancer. Current methods for miRNA analysis often involve complex procedures and high costs, limiting their clinical utility. Therefore, there is a critical need for the development of simpler and more cost-effective miRNA detection techniques to enable early disease diagnosis. In this study, we introduce a novel one-enzyme for miRNA one-step detection method using Taq DNA polymerase, termed OSMOS-qPCR. We optimized the PCR buffer, PCR program, Taq DNA Polymerase concentrations and reverse PCR primer concentrations, resulted in a wide linear range from 100 fM to 0.001 fM (R2 > 0.98 for each miRNA), the detection limit for OSMOS-qPCR was 0.0025 fM. Furthermore, OSMOS-qPCR demonstrates excellent specificity to differentiation of less than 0.1 % nonspecific signal. Finally, we demonstrated the robust amplification efficiency, enabling the detection of trace amounts of cell-free miRNA in serum samples, and the excellent discrimination ability between gastrointestinal cancers and control subjects (AUC value = 1.0) if combined two miRNAs. The development of OSMOS-qPCR offering a simpler, cost-effective, and efficient detection method, has the potential to be non-invasive strategy for early detection of gastrointestinal cancers.

Liquidity Risk Exposure and Earnings Management—Results on an Unexplored Relation in the European Banking Sector

ABSTRACT This study investigates the relation between liquidity risk exposure and earnings management in banks. We use a dynamic panel-data one-step system generalized method of moments estimation and measure exposure to liquidity risk from balance sheet positions. We detect earnings management through income-increasing and -decreasing strategies. We find that the higher the exposure to liquidity risk due to higher liquidity creation, the greater is upward earnings management. Our findings suggest that banks use earnings management to opportunistically conceal high liquidity risk exposure. These findings should be useful for investors and users of financial statements interested in analyzing earnings quality and financial statement reliability. Data Availability: Data are available from specific sources cited in the text. JEL Classification: G21; G30; G32; M41.

Does Institutional Setting Contribute to the Public Debt — Income Inequality Relationship in Developing Economies?

In the context of increasing globalization, income inequality is one severe problem in several countries because it widens the income gap between the rich and the poor, which leads to social instability. Narrowing this gap has become one of the main agendas in many developing countries to satisfy the millennium goals proposed by the United Nations. Meanwhile, government expenditure is one crucial fiscal instrument as it contributes significantly to running the economy and overcoming economic cyclicality. In particular, governance/institutional can positively adjust the public debt — income inequality relationship in developing economies. The purpose of the study to identify the impact of institutional quality, public debt and their interaction on income inequality on a balanced data panel of 34 developing economies for the period 2002–2020. For monitoring endogenous problems and serial autocorrelation in empirical equations, two-step and one-step system GMM (Generalized Method of Moments) assessments are used. The results from the study show that public debt and the quality of institutions increase income inequality, but their interaction narrows it. These results seem to be counter-intuitive. Besides, education enhances income inequality in these economies. The results of the study provide some policy recommendations for reducing the inequalities in society through public debt and the quality of institutions in developing economies. Accordingly, governments in developing economies should use spending financed by public debt to support low-income individuals through social transfers throughout economic development. Importantly, they should spend more on education and health to help the poor improve their skills and knowledge, narrowing the income difference between the rich and the poor. In particular, they should be prudent in controlling and managing public debt to avoid a public debt crisis and social instability.

Sharia Board Characteristics, Macroeconomic Factors, and Non-performing Financing of Indonesian Islamic banks

This study examines the impact of Islamic board characteristics (SB) and macroeconomic factors on the Non-performing financing (NPF) of Islamic commercial banks (ICB). The sample of this study consisted of 14 ICBs in Indonesia from 2010 to 2021. In this study, data estimation used a one-step GMM System model. SB features such as SB Size and SB Woman were found to have a detrimental impact on NPF. GDP per capita, for example, negatively affects NPF, while inflation has a positive impact. However, this study could not show the impact of SB characteristics such as expertise and proximity of SB to NPF. The study also found that macroeconomic factors such as annual open unemployment and interest rates showed an insignificant negative influence on NFP. The findings of this study help regulators, investors, and management of Islamic banks better understand the impact of SB characteristics and macroeconomic factors on Non-performing financing (NPF) of Islamic banks, especially in the context of ICB in Indonesia. In addition, it is expected to inspire similar research in the future.

A novel one-step eco-friendly dipping system for PA66 fiber/rubber composites with excellent interfacial adhesion and its adhesion mechanism

Fiber-reinforced rubber composites (FRRC) are widely used in tires, hoses, conveyor belts and other fields. Currently, the industry heavily relies on the resorcinol-formaldehyde-latex (RFL) system to enhance interfacial adhesion performance of FRRC; however, both resorcinol (R) and formaldehyde (F) pose significant risks to human health and the environment. Thus, some two-step RF-free dipping systems have been developed to replace RFL system. Nevertheless, these complex two-step systems face challenges during industrialization. In this study, we proposed a novel one-step eco-friendly dipping system (PCGL) for polyamide66 (PA66)fibers. By using the new system, a solid transition bridge between PA66 fiber and rubber matrix can be formed, due to the bonding between PA66 and isocyanate, the interaction among polyacrylic acid resin, isocyanate and epoxy, the catalytic effect of triethanolamine, as well as the co-crosslinking of styrene-butadiene-vinyl-pyridine latex and rubber. The interfacial adhesion performance of PA66 fiber/rubber composites treated by PCGL with optimized ratio of epoxy groups/isocyanate groups can reach more than 90% of RFL level, meeting industry requirements for high interfacial bonding performance, while maintaining strength and safety of composites. The mechanism of largely enhanced interfacial adhesion was revealed through the analysis of modulus transition and co-crosslinking at the composite interface.

Average decayed dynamics of one-step transformation process with randomly varying return transition rate

The problem of stochastic averaging of the decayed dynamics of the output state population of a one-step transformation process with constant deterministic forward transition rate and randomly varying return transition rate is solved in approximation where random variation is modeled as a dichotomous stochastic process. The form of the obtained solution represented as a product between bimodal sigmoid rise of average population and its unimodal exponential decay is shown to largely be dependent on the stochastic frequency and amplitude parameters. For example, at high stochastic frequency, the behavior of population is reduced to that of a decayed one-step deterministic system. However, for resonance stochastic amplitude at low stochastic frequency, such behavior coincides with that of three-exponential rise-decay kinetics typical rather of a three-step deterministic slowly decaying process. Thus, there is an equivalence between using a more complex deterministic kinetic model and a less complex stochastic kinetic model for describing the decayed dynamics of different irreversible systems.

An empirical analysis of SDG disclosure (SDGD) and board gender diversity: insights from the banking sector in an emerging economy

AbstractThere has been a recent surge in interest in academic research and public discourse surrounding the Sustainable Development Goals (SDGs). This study examines the level of SDG disclosure (SDGD) in Bangladeshi banking companies and explores its relationship with board gender diversity. An automated keyword search is applied to measure SDGD in the annual reports of publicly traded commercial banks. Based on agency, resource dependence, and stakeholder theories, this study hypothesises that a higher presence of female directors on the board is associated with greater commitment and contribution to SDGs, as evident in SDGD. The findings reveal a consistent increase in SDGD from 2015 to 2020 and confirm a significant positive relationship between board gender diversity and SDGD. The results remain consistent following robustness tests, including one-step and two-step system (dynamic) GMM estimations. Also, the study provides evidence that a critical mass of at least three female directors is necessary to establish a significant positive relationship between board gender diversity and SDGD. The implications of this study are twofold: firstly, it provides preliminary insights into the state of SDGD in the banking industry, which can inform regulators in assessing corporate engagement to SDGs and issuing disclosure guidance for the interest of the stakeholders. Secondly, the study highlights the importance of gender diversity on boards, as more female representation is associated with increasing SDGD. Such empirical findings imply that banking companies should consider appointing more female directors to their boards to advance SDG initiatives. Policymakers can utilise these findings to formulate regulations, particularly regarding the minimum number of female directors on corporate boards. This research contributes to the limited SDGD literature in the emerging economy context, offering insights into how board gender diversity is associated with SDGD.