The research investigates the impact of the lockdown period caused by the COVID-19 to the stock market of India. The study examines the extent of the influence of the lockdown on the Indian stock ...market and whether the market reaction would be the same in pre- and post-lockdown period caused by COVID-19. Market Model Event study methodology is used. A sample of 31 companies listed on Bombay Stock Exchange (BSE) are selected at random for the purpose of the study. The sample period taken for the study is 35 days (24 February-17 April, 2020). An event window of 35 days was taken with 20 days prior to the event and 15 days during the event. The event (t1) being the official announcement of the lockdown. The results indicate that the market reacted positively with significantly positive Average Abnormal Returns during the present lockdown period, and investors anticipated the lockdown and reacted positively, whereas in the pre-lockdown period investors panicked and it was reflected in negative AAR. The study finds evidence of a positive AR around the present lockdown period and confirms that lockdown had a positive impact on the stock market performance of stocks till the situation improves in the Indian context.
In this work, we have reported two coordination polymers (CP1 and CP2) and their zinc-oxide nanoparticle doped composite materials (ZnO@CP1 and 2) under solvothermal and mechanochemical solid ...grinding methods. Both the CPs and their composite materials were employed for wastewater remediation. Interestingly, composite materials have shown superior photocatalytic activity than the parent materials.
Display omitted
•Two new coordination polymers (CP1 and CP2) have been synthesized.•CP1 and CP2 exploited as adsorbent and photocatalyst for adsorption and degradation of different dyes.•ZnO@CP1 and 2 composites were also synthesized using solvothermal and mechanochemical solid grinding methods.•CPs were characterized by various spectral, diffractions, thermal and microscopic methods.•The dye adsorption mechanism is also validated by DFT method.
Two Cd(II) and Cu(II) coordination polymers (CPs) with the compositions of Cd(HIPA)(HIZ)(H2O)2n·3H2O (CP1) and Cu(HIPA)(HIZ)2n·2H2O∙MeOH (CP2), where, (H3IPA = 5-hydroxy isophthalic acid, and HIZ = imidazole), were successfully obtained by the reaction of the mixed ligand of H3IPA and HIZ under solvothermal conditions. The prepared CPs were characterized by X-ray diffractions (XRD), Fourier transform infrared (FTIR) spectroscopy, UV–visible spectroscopy, thermogravimetric analysis (TGA), Brunauer-Emmett-Teller (BET) analysis, and microscopic (TEM and SEM) techniques. The complexes 1 and 2 shows dual behavior as adsorbent and photocatalyst for the adsorption and photocatalytic degradation of methyl blue (MB), methyl orange (MO), and crystal violet (CV) dyes. Additionally, zinc-oxide doped composite materials (ZnO@CP1 and 2) were also synthesized using solvothermal and mechanochemical solid grinding methods. Compared with the parent coordination frameworks (CP1 and CP2), the composites (ZnO@CP1 and 2) exhibited slightly improved surface area with reduced photogenerated electron-hole ratio, hence displayed good photo degradation activity. Moreover, the density functional theory (DFT/B3LYP) with the counterpoise and dispersion corrections was employed to validate dyes adsorption mechanism with the reported CPs.
Display omitted
•PES scan was carried out for o-, m-, p-iodonitrobenzene.•Anharmonic frequencies are found in excellent agreement with IR experiments.•Vibrational and electronic spectra were ...analyzed.
In the present work, molecular geometry and anharmonic vibrational spectra of o-, m-, p-iodonitrobenzene have been studied. The anharmonic frequencies were calculated using second order perturbative (PT2) approach with basis set 3-21G∗ on iodine and 6-311G(d,p) on other atoms at DFT(B3LYP) level of theory and were compared to experimental values. The assignments of vibrational modes of isomeric iodonitrobenzenes were done by using potential energy distribution (PED) and vibrational assignments of benzene, nitrobenzene and iodobenzene. The combination and overtone bands are also assigned. The electronic spectra were recorded as well as simulated using polarizable continuum model (PCM) at TD-B3LYP/6-311G(d,p)/3-21G∗ level of theory. The vibrational and electronic spectra are interpreted. Moreover, atomic charges, MEP mapping, HOMO–LUMO, NBO analysis and various thermodynamics and molecular properties are reported.
The density functional theory calculations and spectroscopic characterization (FTIR, FT-Raman, 1H NMR and ultraviolet–visible) of the pharmaceutically active compound Cholesteno ...4,6-b,c-2′,5′-dihydro-1′,5′-benzothiazepine (CHBT) have been carried out. The recorded Vibrational, proton NMR and electronic spectra have been compared with the simulated one and they are found in well agreement. The bands appearing in FTIR and FT-Raman spectra are assigned with great accuracy using animated modes. The ultraviolet–visible (UV–Vis) absorption bands are assigned using molecular orbitals data obtained by TD-B3LYP/PCM calculations with 6-311G(d,p) basis set. Proton NMR signal peaks have been assigned using GIAO-B3LYP/6-311G(d,p)/PCM method. The hyperconjugative interactions and charge delocalization within the molecule have been studied using natural bond orbital (NBO) analysis. The non-linear optical (NLO) behavior of the present compound has been investigated using theoretical dipole moment, polarizability and first static hyperpolarizability values. The thermodynamic functions (entropy, heat capacity and enthalpy) obtained from harmonic force field calculations for the range of temperature 100–1000 K are reported. Moreover, highest occupied molecular orbital – lowest unoccupied molecular orbital (HOMO-LUMO) analysis, molecular electrostatic potential (MEP) diagram, global reactivity descriptors and condensed or atomic Fukui Functions have been also presented.
Display omitted
•FTIR, FT-Raman, proton NMR and ultraviolet–visible spectroscopic measurements have been performed.•DFT and TD-DFT calculations have been done in gaseous as well as solution phase.•Vibrational, electronic and 1H NMR spectra have been assigned.•Various theoretical molecular parameters have been reported.
Infectious diseases a curse for humanity can be curbed through immunization. Vaccination can make people more resilient toward infectious diseases and the safety of the vaccine is of prime importance ...for public health. A smart vaccine management system can address the issue of vaccine expiration and counterfeiting. The study was conducted in twofolds: Stage I, a quantitative cross‐sectional survey design was deployed to understand stakeholder adoption intention (ADI) toward blockchain‐enabled vaccine supply chain through extended technology adoption model using partial least square structural equation modeling. Findings entail stakeholders' trust and perceived ease of use for blockchain‐enabled vaccine supply chain directly affect perceived usefulness (PUS) and individual subjective norm. PUS significantly influences the ADI of stakeholders toward blockchain in the vaccine supply chain. Stage II, a blockchain integrated vaccine supply chain architecture with Internet of things devices was proposed to bring transparency and flexibility to the vaccine supply chain. Architecture would benefit the beneficiary to approve or disapprove the vaccines through the self‐generated report and medical health centers can see the efficacy of vaccines before clinical delivery to patients.
Water deficit stress is a critical abiotic constraint to mung bean production that affects plant growth and development and finally reduces crop yield. Therefore, a field experiment was conducted at ...five diverse environments using four water stress-tolerant genotypes, namely BARI Mung-8, BMX-08010-2, BMX-010015, and BMX-08009-7, along with two popular cultivated varieties (check) of BARI Mung-6 and BARI Mung-7 to evaluate more stable tolerant genotypes across the country. Stability analysis was performed based on the grain yield. The combined analysis of variance showed significant variations among genotypes, environments, and their interactions. The AMMI analysis of variance indicated that genotype accounted for 91% of the total sum of squares for grain yield, followed by genotype × environment interaction (5%), and environment (4%). Partitioning of interaction indicated that the first three interaction principal components (IPCA1–IPCA3) were highly significant (p ≤ 0.01). Using these significant IPCAs, AMMI stability parameters and non-parameter indices BMX-010015 was found stable across the environment based on yield traits and grain yield. The BMX-08010-2 genotype also showed significant regression coefficient (bi) more than unity, and non-significant deviation from regression (S2di) values, indicating suitable for a favorable environment considering grain yield. So, based on the stability analysis (Eberhart and Russell), additive main effects, and multiplicative interactions (AMMI) analysis, the BMX-010015 and BMX-08010-2 could be suitable for having tolerance to water deficit stress.
Display omitted
•A synthesis of novel steroidal pyrimidines has been performed.•The interaction of compounds with HSA was also carried out with multispectroscopic techniques and docking studies.•MTT ...assay was carried out to check the toxicity of new compounds.•Antioxidant activity of the synthesized compounds by various methods have also been investigated.
As a part of our continuing program on the synthesis of steroidal heterocycles, it has been prepared a series of novel steroidal pyrimidine derivatives 4–6via TMSCl, steroidal ketones (1c–3c), urea and benzaldehyde. The systems presented here, are novel scaffolds and have not been described before at 6th position of steroidal-6-one (1c–3c). Structural assignment of newly synthesized compounds was performed by DFT/B3LYP calculations as well as spectral and analytical data. The interactions of compounds (4–6) with HSA were studied by fluorescence spectroscopy, DLS, CD and molecular docking, under imitated physiological conditions. The antitumor activity has been tested in vitro against three cancer cell lines MDA-MB231 (breast carcinoma), HeLa (human cervical carcinoma), HepG2 (hepatic carcinoma) and one non-cancer normal cell lines, PBMCs (peripheral blood mononuclear cell) by MTT assay. In addition, in vitro antioxidant activity and apoptosis assay of the synthesized compounds (4–6) have also been investigated.
An emotionally recognised area of research has already been quite prominent. EEG brain signals have recently been used to recognise an individual's mental condition. Attention often plays a key role ...in human development, but needs more study. This article offers a noble method of acknowledgment of human attention by sophisticated machine learning algorithms. Scalp-EEG signalling is a cost-effective, single-swinged mechanism dependent on time. Many trials have shown possible support for emotional identification through brain EEG waves. This paper examines and suggests a modern technology for the identification of emotions through the application of new computer learning principles. Ablations experiments also demonstrate the clear and important benefit to the efficiency of our RGNN model from the adjacent matrix and two regularizers. Finally, neuronal researches reveal key brain regions and inter-channel relationships for EEG related emotional awareness.
PDF
