Encapsulation of ciprofloxacin, sparfloxacin, and ofloxacin drugs with α- and β-cyclodextrins: spectral and molecular modelling studies

<div><p></p><p>Inclusion complexation of ciprofloxacin (CIP), sparfloxacin (SPA), and ofloxacin (OFL) drugs with α-CD and β-CD was studied by UV-visible, fluorescence, time-resolved fluorescence, Fourier transform infrared spectroscopy (FTIR), hydrogen nuclear magnetic resonance (¹HNMR), scanning electron microscopy (SEM), and molecular modelling techniques. Changes in the absorbance and fluorescence intensities and fluorescence lifetime of the drugs in the cyclodextrin (CD) solutions suggest the formation of inclusion complexes. Carbonyl stretching frequency moved to higher wave numbers and broadening of the N–H stretching band indicated the formation of inclusion complex. Cyclohexane ring protons of the drugs show remarkable upfield or downfield shift in the ¹HNMR spectrum, indicating that the cyclohexane part of the guest molecule is entrapped inside CD cavities. SEM images of CIP/CD, SPA/CD, and OFL/CD complexes have a crystal structure with different morphology from the isolated CIP, SPA, OFL, and CDs. Investigations of the energetic, thermodynamic, and electronic properties of parametric model number 3 computational calculations confirmed the stability of the inclusion complex.</p></div

Excimer emission of caffeine with α- and β-cyclodextrins: spectral and molecular modelling studies

<p>Excimer emission of caffeine with α-CD and β-CD were studied by UV-visible, fluorescence, time-resolved fluorescence, FTIR, ¹H NMR and molecular modelling techniques. Changes in the absorbance and fluorescence and lifetime of the caffeine with cyclodextrin (CD) solutions indicate (i) caffeine shows dual emission in the CD solutions, (ii) normal emission originates from a monomer and the longer wavelength emission is due to excimer and (iii) in both CDs caffeine forms 1:2 inclusion complex. Carbonyl stretching frequency moved to higher wave numbers and broadening of the N–H stretching band indicated the formation of inclusion complex. The resonance of the methyl protons of caffeine show remarkable upfield or downfield shift in the ¹H NMR, which indicates imidazole ring of the caffeine entrapped in the CD cavities. Investigations of energetic, thermodynamic and electronic properties of PM3 computational calculations confirmed the stability of the inclusion complex.</p

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Not AvailableIn this study, a total of 120 non purposive serum samples (Cows-68; Bullocks-32; Bulls-20) randomly collected from different breeds of bovine (Cross breed- 41; Indigenous- 61 and Non-descript-18) in six districts (Bargarh-40; Angul-15, Koraput-22, Boudh-14, Nayagarh-11, Jagatsinghpur-18) of Odisha by field veterinary officers during surveys from April to May 2013 were included. These samples were tested at 1:100 dilution in microscopic agglutination test (MAT) using live antigens of 14 reference leptospiral serovars in order to investigate the seroprevalence of bovine leptospirosis. The overall seroprevalence of 42.5% (51/120=CI: 95% 34.0 to 51.4) with 48.5% in cows, 28.1% in bullocks and 45.0% in bulls was observed. The overall analysis of chi-square test revealed that seroprevalance in bovine are associated with age (χ2 =5.78, p<0.10), whereas not associated with breed type and health status. Among the targeted districts, high prevalence was observed in Nayagarh (81.8%) followed by Bargarh (47.5%), Jagatsinghpur (44.4 %) and Boudh (42.8%). In general, the prevalence across the sample regions was significant (χ2 =12.45, p<0.05) indicating the prevalalence was associated with regions. Out of 51 reacted sera, 13 samples showed reactivity with more than one serovars representing 25.5%. The predominant leptospiral antibodies determined against frequency distribution of the serovars were: Australis (50.9%); Hardjo (23.5%); Canicola, Tarassovi and Kaup (7.8%); Pomona, Hurstbridge (5.9%); Bankinang, Javanica, Hebdomadis and Pyrogenes (3.9%); and Icterohaemorrhagiae, Grippotyphosa and Shermani (2.0%). This study supports that bovines may have a role in maintaining Australis serovar apart from being a well known reservoir for Hardjo serovar in Odisha state, IndiaNot Availabl

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Not AvailableThe study describes prevalence, clinical symptoms and risk factors for brucellosis in personnel engaged in veterinary health care in Karnataka, India. A total of 1050 sera samples were collected from animal handlers, veterinarians, veterinary students, para-veterinarians and persons engaged in artificial insemination of animals. The sera samples were tested for brucellosis by Rose Bengal plate test (RBPT), serum agglutination test (SAT), IgG and IgM indirect ELISA and PCR. Age, sex, clinical symptoms and risk factors were recorded in structured questionnaire. Of the 1050 samples tested, 6.76, 6.38, 3.90, 2.67 and 2.0% were positive by IgG ELISA, RBPT, SAT, IgM ELISA and PCR, respectively and overall prevalence recorded was 7.04%. The prominent clinical symptoms observed were intermittent fever (71.62%) followed by joint pain and body aches. A high degree of suspicion, awareness and multimodal diagnostic approach is suggested for early diagnosis, treatment and disease follow up.Not Availabl

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Not AvailableBACKGROUND:Swine brucellosis is a zoonotic disease caused by Brucella suis. The study describes the occurrence of brucellosis in two organized piggeries in Southern India. METHODS:A total of 585 serum samples comprising 575 from pigs and 10 from animal handlers were collected and tested by serological tests and PCR. Tissue samples were collected for isolation of the pathogen. RESULTS:Out of 575 serum samples screened, 236 (41.04%) were positive for brucellosis by both Rose Bengal plate test (RBPT) and indirect ELISA (iELISA) and 47 (8.17) samples showed Brucella DNA amplification by genus specific PCR. The sows those aborted and 19 boars with orchitis were seropositive for brucellosis indicating association of clinical symptoms with brucellosis seropositivity. Two of 10 pig handlers were positive by RBPT and showed significant serum agglutination test (SAT) titres of >1:160 and 1:320. B. suis bvI was isolated and identified by biochemical tests and confirmed by amplification Brucella genus and Bruce ladder PCRs from vaginal and testicular samples. CONCLUSIONS:The introduction of untested breeding boars in the farms might have resulted in the disease transmission and spread. The present study highlighted the diagnosis of B. suis bvI as a cause of abortions in the pigs and occupational exposure to farm personnel.Not Availabl

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Not AvailableLateral flow assay (LFA) for brucellosis was standardized and evaluated. The test showed high diagnostic sensitivity, specificity and accuracy for diagnosis of brucellosis in bovines, small ruminants and swine. The study emphasized the importance of LFA as a useful, rapid, and easy-to-perform tool for the testing of brucellosis.Not Availabl

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Not AvailableThe study describes prevalence, clinical symptoms and risk factors for brucellosis in personnel engaged in veterinary health care in Karnataka, India. A total of 1050 sera samples were collected from animal handlers, veterinarians, veterinary students, para-veterinarians and persons engaged in artificial insemination of animals. The sera samples were tested for brucellosis by Rose Bengal plate test (RBPT), serum agglutination test (SAT), IgG and IgM indirect ELISA and PCR. Age, sex, clinical symptoms and risk factors were recorded in structured questionnaire. Of the 1050 samples tested, 6.76, 6.38, 3.90, 2.67 and 2.0% were positive by IgG ELISA, RBPT, SAT, IgM ELISA and PCR, respectively and overall prevalence recorded was 7.04%. The prominent clinical symptoms observed were intermittent fever (71.62%) followed by joint pain and body aches. A high degree of suspicion, awareness and multimodal diagnostic approach is suggested for early diagnosis, treatment and disease follow up.Not Availabl

Ti₃C₂-MXene/NiO Nanocomposites-Decorated CsPbI₃ Perovskite Active Materials under UV-Light Irradiation for the Enhancement of Crystal-Violet Dye Photodegradation

Ti3C2-MXene material, known for its strong electronic conductivity and optical properties, has emerged as a promising alternative to noble metals as a cocatalyst for the development of efficient photocatalysts used in environmental cleanup. In this study, we investigated the photodegradation of crystal-violet (CV) dye when exposed to UV light using a newly developed photocatalyst known as Ti3C2-MXene/NiO nanocomposite-decorated CsPbI3 perovskite, which was synthesized through a hydrothermal method. Our research investigation into the structural, morphological, and optical characteristics of the Ti3C2-MXene/NiO/CsPbI3 composite using techniques such as FTIR, XRD, TEM, SEM–EDS mapping, XPS, UV–Vis, and PL spectroscopy. The photocatalytic efficacy of the Ti3C2-MXene/NiO/CsPbI3 composite was assessed by evaluating its ability to degrade CV dye in an aqueous solution under UV-light irradiation. Remarkably, the Ti3C2-MXene/NiO/CsPbI3 composite displayed a significant improvement in both the degradation rate and stability of CV dye when compared to the Ti3C2-MXene/NiO nanocomposite and CsPbI3 perovskite materials. Furthermore, the UV–visible absorption spectrum of the Ti3C2-MXene/NiO/CsPbI3 composite demonstrated a reduced band gap of 2.41 eV, which is lower than that of Ti3C2-MXene/NiO (3.10 eV) and Ti3C2-MXene (1.60 eV). In practical terms, the Ti3C2-MXene/NiO/CsPbI3 composite achieved an impressive 92.8% degradation of CV dye within 90 min of UV light exposure. We also confirmed the significant role of photogenerated holes and radicals in the CV dye removal process through radical scavenger trapping experiments. Based on our findings, we proposed a plausible photocatalytic mechanism for the Ti3C2-MXene/NiO/CsPbI3 composite. This research may open up new avenues for the development of cost-effective and high-performance MXene-based perovskite photocatalysts, utilizing abundant and sustainable materials for environmental remediation

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Not AvailableLateral flow assay (LFA) for brucellosis was standardized and evaluated. The test showed high diagnostic sensitivity, specificity and accuracy for diagnosis of brucellosis in bovines, small ruminants and swine. The study emphasized the importance of LFA as a useful, rapid, and easy-to-perform tool for the testing of brucellosis.Not Availabl