1,512,455 results match your criteria Chemical & pharmaceutical bulletin[Journal]


Chemical Components and Antibacterial Activity of the Essential Oil of Six Pyrrosia Species.

Chem Biodivers 2020 Jul 11. Epub 2020 Jul 11.

Shandng Drug and Food Vocational College, School of Pharmacy, East Chuzhang Road, New City of Science and Technology, Weihai High-tech Industrial Development Zone, Weihai city, CHINA.

The present study was aimed at analyzing the chemical components of the essential oil from six Pyrrosia species by GC-MS and evaluate their in vitro antibacterial activities. Seventy volatile compounds were identified in the essential oil of six Pyrrosia samples. The identified volatile components were divided into the following nine categories: aldehydes, terpenoids, fatty acids, ketone, furans, hydrocarbons, alcohols, esters, and phenols. Read More

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http://dx.doi.org/10.1002/cbdv.202000526DOI Listing

Enzyme Instructed Self-assembly of Naphthalimide-dipeptide: Spontaneous Transformation from Nanosphere to Nanotubular Structures that Induces Hydrogelation.

Chem Asian J 2020 Jul 11. Epub 2020 Jul 11.

National Chiao Tung University, Materials Science and Engineering, 1001 University Rd., 30010, Hsinchu, TAIWAN.

Understanding the structure-morphology relationships of the self-assembled nanostructures is very crucial for developing the materials with the desired chemical and biological functions. Here, phosphate-based naphthalimide (NI) derivatives have been developed for the first time to study the enzyme instructed self-assembly process. Self-assembly of simple amino acid derivative NI-Y p resulted in non-specific amorphous aggregates in the presence of alkaline phosphatase enzyme. Read More

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http://dx.doi.org/10.1002/asia.202000575DOI Listing

A natural BACE1 and GSK3β dual inhibitor Notopterol effectively ameliorates the cognitive deficits in APP/PS1 Alzheimer's mice by attenuating amyloid-β and tau pathology.

Clin Transl Med 2020 Jul 11. Epub 2020 Jul 11.

Key Laboratory of Structure-Based Drug Design & Discovery, Ministry of Education, Shenyang Pharmaceutical University, Shenyang, People's Republic of China.

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http://dx.doi.org/10.1002/ctm2.50DOI Listing

Tuning Electrical- and Photo-Conductivity by Cation Exchange within a Redox-Active Tetrathiafulvalene-Based Metal-Organic Framework.

Angew Chem Int Ed Engl 2020 Jul 11. Epub 2020 Jul 11.

Nanjing University, School of Chemistry and Chemical Engineering, Han Kou Road 22, 210093, Nanjing, CHINA.

To activate electronic and optical functions of the redox-active metal-organic framework, (Me 2 NH 2 )[In III (TTFTB)]·0.7C 2 H 5 OH· DMF (Me 2 NH 2 @ 1, TTFTB = tetrathiafulvalene-tetrabenzoate, DMF = N,N -dimethylformamide), has been exchanged by tetrathiafulvalenium (TTF •+ ) and N,N ' -dimethyl- 4,4 ' -bipyridinium (MV 2+ ). These cations provide electron carriers and photosensitivity. Read More

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http://dx.doi.org/10.1002/anie.202008941DOI Listing

Induction of Allergic Contact Dermatitis and Pervasive Face Edema due to Brazilian Keratin Treatment.

J Cosmet Dermatol 2020 Jul 11. Epub 2020 Jul 11.

Department of Dermatology, Faculty of Medicine, Hatay Mustafa Kemal University, Hatay, Turkey.

Brazilian keratin treatment (BKT) is a prevalent hair straightening method widely used by women in the world. The degree of concentration of formaldehyde safe for sensitive patients is still obscure. Report claims that these products contain intolerably high levels of formaldehyde. Read More

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http://dx.doi.org/10.1111/jocd.13605DOI Listing

Tuning the adsorption selectivity of ZIF-8 by amorphization.

Chemistry 2020 Jul 11. Epub 2020 Jul 11.

Ningbo University, The School of Materials Science and Chemical Engineering, Fenghua Road 818#, 315211, Ningbo, CHINA.

Amorphous metal-organic frameworks (amMOFs) with partial collapsed structure present a new category of porous hybrid materials. Herein, a solid-state amorphization of ZIF-8 was achieved by mechanical compression at 0.75 GPa. Read More

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http://dx.doi.org/10.1002/chem.202001249DOI Listing

Control efficacy and joint toxicity of thiamethoxam mixed with spirotetramat against the Asian citrus psyllid, Diaphorina citri Kuwayama.

Pest Manag Sci 2020 Jul 11. Epub 2020 Jul 11.

Department of Entomology, Institute of Plant Protection, Hunan Academy of Agricultural Sciences, Changsha, 410125, China.

Background: The Asian citrus psyllid (ACP), Diaphorina citri Kuwayama, is one of the most devastating pests in citrus orchards, and has caused huge economic losses worldwide. Chemical control is the most effective way for psyllid control. Herein, the toxicity of nine insecticides to ACP adults and the joint action of thiamethoxam+spirotetramat were determined by a topical application method in the laboratory; field plot experiments were conducted to evaluate the control efficacy of one self-made thiamethoxam·spirotetramat 40% suspension concentrate (SC) comparing with thiamethoxam 21% SC, spirotetramat 22. Read More

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http://dx.doi.org/10.1002/ps.6004DOI Listing

Universal Access to Two-Dimensional Mesoporous Heterostructures via Micelle-Directed Interfacial Assembly.

Angew Chem Int Ed Engl 2020 Jul 11. Epub 2020 Jul 11.

The University of Queensland, School of Chemical Engineering and Australian Institute for Bioengineering and Nanotechnology (AIBN), Saint Lucia, 4072, Brisbane, AUSTRALIA.

Two-dimensional (2D) mesoporous heterostructures combining ultrathin nanosheet morphology, periodic porous surface structures and diverse hybrid compositions have recently emerged and become increasingly important for renewable energy storage and electronics. However, it remains a great challenge to develop a universal method to prepare 2D mesoporous heterostructures. Here, we report a composite micelle-directed interfacial assembly method to synthesize vertical heterostructures with ultrathin 2D material and two surrounding mesoporous monolayers assembled on both sides. Read More

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http://dx.doi.org/10.1002/anie.202007063DOI Listing

Anchoring Ba(II) to Pd/HyWO3-x Nanowires Promote the Photocatalytic Reverse Water Gas Shift Reaction.

Chemistry 2020 Jul 11. Epub 2020 Jul 11.

University of Toronto, Chemistry, CANADA.

A conformal coating of Ba(II) on the surface of Pd/HyWO3-x nanowires was developed using a solution-phase atomic layer deposition process. The proceedure involves generation of Brønsted surface OH sites by H2 spillover on Pd/WO3, which can then hydrolytically condense with Ba(OEt)2 to produce surface Ba(II). At just 0. Read More

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http://dx.doi.org/10.1002/chem.202002975DOI Listing

Fragmentation Mechanism of White Phosphorus: A Theoretical Insight into Multiple Cleavage/Formation of P-P and P-C Bonds.

Chemistry 2020 Jul 11. Epub 2020 Jul 11.

Dalian University of Technology, School of Chemical Engineering, CHINA.

Molecular-level understanding of metal-mediated white phosphorus (P 4 ) activation is meaningful but challenging because of its direct relevance to conversion of P 4 into useful organophosphorus compounds as well as the complicated and unforeseeable cleavage process of P-P bonds. The related study, however, has still rarely been achieved to date. We reported here a theoretical insight into step-by-step process of three P-P bond cleavage/four P-C bond formation for [P 3 +P 1 ]-fragmentation of P 4 mediated by lutetacyclopentadienes. Read More

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http://dx.doi.org/10.1002/chem.202002338DOI Listing

Use of olive (Olea europaea L.) leaves as beer ingredient, and their influence on beer chemical composition and antioxidant activity.

J Food Sci 2020 Jul 11. Epub 2020 Jul 11.

Department of Agricultural, Food, Environmental and Animal Sciences, University of Udine, via delle Science, Udine, 206, Italy.

Olive leaves are well known for their high polyphenol content and beneficial effects to human health. The two main phenolic compounds of olive leaves are oleuropein and 3-hydroxytyrosol. Use of olive leaves as beer ingredient was evaluated, to investigate their contribution to bitterness and antioxidant activity of beer. Read More

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http://dx.doi.org/10.1111/1750-3841.15318DOI Listing

Effects of brew strength, brew yield, and roast on the sensory quality of drip brewed coffee.

J Food Sci 2020 Jul 11. Epub 2020 Jul 11.

Department of Food Science and Technology, University of California, One Shields Avenue, Davis, CA, 95616, U.S.A.

Drip brewed coffee is traditionally quantified in terms of its strength, also known as total dissolved solids (TDS), and its brewing yield, also known as percent extraction (PE). Early work in the 1950s yielded classifications of certain regimes of TDS and PE as "underdeveloped," "bitter," or "ideal," with the modifiers "weak" or "strong" simply correlated with TDS. Although this standard is still widely used today, it omits a rich variety of sensory attributes perceptible in coffee. Read More

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http://dx.doi.org/10.1111/1750-3841.15326DOI Listing

The natural compound Cirsitakaoside enhances antiviral innate responses against vesicular stomatitis virus in vitro and in vivo.

Int Immunopharmacol 2020 Jul 8;86:106783. Epub 2020 Jul 8.

Guangdong Provincial Key Laboratory of Regional Immunity and Diseases, Department of Immunology, Shenzhen University School of Medicine, Shenzhen 518060, China. Electronic address:

Cirsitakaoside, isolated and purified from the stems and leaves of Premna szemaoensis and Macaranga denticulata, is a natural compound with potential anti-inflammatory effects. However, the role of Cirsitakaoside in antiviral activity and the underlying mechanism remains largely unknown. In this study, we aimed to identify whether Cirsitakaoside has antiviral activity and investigated the underlying mechanisms. Read More

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http://dx.doi.org/10.1016/j.intimp.2020.106783DOI Listing

Limonene, a food additive, and its active metabolite perillyl alcohol improve regeneration and attenuate neuropathic pain after peripheral nerve injury: Evidence for IL-1β, TNF-α, GAP, NGF and ERK involvement.

Int Immunopharmacol 2020 Jul 8;86:106766. Epub 2020 Jul 8.

Laboratory of Neuroscience and Pharmacological Assays (LANEF), Department of Physiology, Federal University of Sergipe, São Cristóvão, SE 49100-000, Brazil; Franco-Brazilian Network on Natural Products (FB2NP), Brazil. Electronic address:

Background: Limonene (LIM) and its main metabolite perillyl alcohol (POH) are ingredients found in food with promising chemical entities due to their pharmacological profile. In this study, we hypothesized that LIM and POH are two molecules capable of accelerating the regenerative process and alleviating neuropathic pain.

Methods: Animals were treated daily (LIM, POH and saline) for 28 days and during this period evaluated for mechanical hyperalgesia, astrocyte participation by immunofluorescence for GFAP, and ELISA was used to quantify IL-1β and TNF-α in the spinal cord. Read More

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http://dx.doi.org/10.1016/j.intimp.2020.106766DOI Listing

Repellent and acaricidal activity of essential oils and their components against Rhipicephalus ticks in cattle.

Vet Parasitol 2020 Jun 29;283:109178. Epub 2020 Jun 29.

Department of Parasitology, University of Agriculture Faisalabad, Pakistan.

Ticks, particularly the Rhipicephalus which are the most prevalent and invasive affect 80 % of the cattle population worldwide. Through transmission of pathogens, tick worry and physical damage to the hides, ticks cause economic loss of billions of dollars each year with 1 billion US dollars loss per annum reported only in Latin-America. These losses can be minimized only by successful management of Rhipicephalus ticks. Read More

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http://dx.doi.org/10.1016/j.vetpar.2020.109178DOI Listing

Design and optimization of bioreactor to boost carbon dioxide assimilation in RuBisCo-equipped Escherichia coli.

Authors:
Shih-I Tan I-Son Ng

Bioresour Technol 2020 Jul 6;314:123785. Epub 2020 Jul 6.

Department of Chemical Engineering, National Cheng Kung University, Tainan 70101, Taiwan. Electronic address:

Global warming is a surging issue that has provoked the demand of green process to mitigate carbon dioxide. In this context, RuBisCo-equipped Escherichia coli has first developed and evaluated the CO-assimiliable capability based on the mass balance in three devices: Flask-based in CO incubator (FIC), two-layered device (TLD) and CO bubbling device (CBD) systematically. With the forced diffusion of 5% CO in CBD, which confers an efficient attack of CO to RuBisCo, the CO assimilation increased from -5. Read More

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http://dx.doi.org/10.1016/j.biortech.2020.123785DOI Listing

Structure-based mechanistic insights into catalysis by tRNA thiolation enzymes.

Curr Opin Struct Biol 2020 Jul 8;65:69-78. Epub 2020 Jul 8.

Laboratoire de Chimie des Processus Biologiques, UMR 8229 CNRS, Collège de France, Université Paris Sciences et Lettres, 11 Place Marcelin Berthelot, 75231 Paris cedex 05, France. Electronic address:

In all domains of life, ribonucleic acid (RNA) maturation includes post-transcriptional chemical modifications of nucleosides. Many sulfur-containing nucleosides have been identified in transfer RNAs (tRNAs), such as the derivatives of 2-thiouridine (sU), 4-thiouridine (sU), 2-thiocytidine (sC), 2-methylthioadenosine (msA). These modifications are essential for accurate and efficient translation of the genetic code from messenger RNA (mRNA) for protein synthesis. Read More

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http://dx.doi.org/10.1016/j.sbi.2020.06.002DOI Listing

Suspect screening based on market data of polar halogenated micropollutants in river water affected by wastewater.

J Hazard Mater 2020 Jul 4;401:123377. Epub 2020 Jul 4.

Catalan Institute for Water Research (ICRA), Carrer Emili Grahit 101, 17003, Girona, Spain; Universitat de Girona, Girona, Spain.

Wastewater treatment plants (WWTPs) are known point sources of contaminants of emerging concern (CECs) to the aquatic environment, but current knowledge is mostly limited to well-known chemical structures. In this study, we sought to identify unknown CECs polluting the aquatic environment through a novel suspect screening approach for organohalogens, i.e. Read More

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http://dx.doi.org/10.1016/j.jhazmat.2020.123377DOI Listing

Alkyl chain length affecting uptake of imidazolium based ionic liquids by ryegrass (Lolium perenne L.).

J Hazard Mater 2020 Jul 2;401:123376. Epub 2020 Jul 2.

CAS Key Laboratory of Urban Pollutant Conversion, Department of Environmental Science and Engineering, University of Science and Technology of China, Hefei 230026, China. Electronic address:

Imidazolium based ionic liquids (ILs) have been extensively used in the various industrial fields, however, the dependence of their structure on toxicity and bioavailability by plants is not clear. Thus, in this study, uptake of imidazolium based ILs with different alkyl chain lengths (e.g. Read More

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http://dx.doi.org/10.1016/j.jhazmat.2020.123376DOI Listing

Co-immobilization of laccase and ABTS onto amino-functionalized ionic liquid-modified magnetic chitosan nanoparticles for pollutants removal.

J Hazard Mater 2020 Jun 30;401:123353. Epub 2020 Jun 30.

State Key Laboratory of Materials-Oriented Chemical Engineering, School of Pharmaceutical Sciences, Nanjing Tech University, Nanjing 210009, China. Electronic address:

This work aims to achieve the co-immobilization of laccase and 2,2-binamine-di-3-ethylbenzothiazolin-6-sulfonic acid (ABTS) to improve removal capability of the biocatalyst for pollutants while avoiding potential pollution caused by ABTS. The laccase was immobilized on magnetic chitosan nanoparticles modified with amino-functionalized ionic liquid containing ABTS (MACS-NIL) based on Cu ion chelation (MACS-NIL-Cu-lac). The carrier was characterized by Fourier transform infrared spectroscopy, thermogravimetric analysis, x-ray diffraction and etc. Read More

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http://dx.doi.org/10.1016/j.jhazmat.2020.123353DOI Listing

Novel green phosphorene as a superior chemical gas sensing material.

J Hazard Mater 2020 Jun 30;401:123340. Epub 2020 Jun 30.

School of Molecular Sciences, The University of Western Australia, Perth, WA 6009, Australia.

Green phosphorus and its monolayer variant, green phosphorene (GreenP), are the recent members of two-dimensional (2D) phosphorus polymorphs. The new polymorph possesses the high stability, tunable direct bandgap, exceptional electronic transport, and directionally anisotropic properties. All these unique features could reinforce it the new contender in a variety of electronic, optical, and sensing devices. Read More

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http://dx.doi.org/10.1016/j.jhazmat.2020.123340DOI Listing

Synergistic effects, gaseous products, and evolutions of NO precursors during (co-)pyrolysis of textile dyeing sludge and bamboo residues.

J Hazard Mater 2020 Jun 29;401:123331. Epub 2020 Jun 29.

Guangdong Key Laboratory of Environmental Catalysis and Health Risk Control, School of Environmental Science and Engineering, Guangdong University of Technology, Guangzhou, 510006, China.

This study aimed to investigate the synergistic influences of the textile dyeing sludge (TDS) and bamboo residues (BR) co-pyrolysis, and its effects on the formation mechanisms of NH and HCN. The mass loss rate was lower for TDS than BR, with the co-pyrolysis with 50% BR exerting the strongest synergistic effect. The pyrolysis stages 1 (< 400 °C) and 2 (400-800 °C) were best described using the diffusion and third-order reaction mechanisms, respectively. Read More

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http://dx.doi.org/10.1016/j.jhazmat.2020.123331DOI Listing

Highly efficient removal of thallium in wastewater by MnFeO-biochar composite.

J Hazard Mater 2020 Jun 25;401:123311. Epub 2020 Jun 25.

Key Laboratory of Water Quality and Conservation in the Pearl River Delta, Ministry of Education, Institute of Environmental Research at Greater Bay, School of Environmental Science and Engineering, Guangzhou University, Guangzhou 510006, China; Guangdong Provincial Key Laboratory of Radionuclides Pollution Control and Resources, Guangzhou 510006, China. Electronic address:

Thallium (Tl), is a highly toxic trace metal in the natural environment. Emerging Tl pollution in waters has gradually become a global concern. However, limited removal technologies are available for Tl-containing wastewater. Read More

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http://dx.doi.org/10.1016/j.jhazmat.2020.123311DOI Listing

An efficient broad spectrum-driven carbon and oxygen co-doped g-CN for the photodegradation of endocrine disrupting: Mechanism, degradation pathway, DFT calculation and toluene selective oxidation.

J Hazard Mater 2020 Jun 27;401:123309. Epub 2020 Jun 27.

Institute for Energy Research, Jiangsu University, Zhenjiang 212013, PR China. Electronic address:

In this study, a new type of carbon and oxygen co-doped g-CN (PACN) was successfully synthesized by a one-step thermal polymerization method for the photodegradation of Bisphenol A (BPA) and selective oxidation of toluene to benzaldehyde. The degradation rate of BPA was 23.58 times higher than that of pristine g-CN and the efficiency benzaldehyde formation rate without the need of any solvent increased to 5. Read More

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http://dx.doi.org/10.1016/j.jhazmat.2020.123309DOI Listing

Recyclable aqueous metal adsorbent: Synthesis and Cu(II) sorption characteristics of ternary nanocomposites of FeO nanoparticles@graphene-poly-N-phenylglycine nanofibers.

J Hazard Mater 2020 Jun 22;401:123283. Epub 2020 Jun 22.

Department of Nanotechnology and Advanced Materials Engineering, Sejong University, Gwangjin-gu, Seoul, 05006, Republic of Korea; Graphene Research Institute (GRI) & GRI-TPC International Research Center, Sejong University, Gwangjin-gu, Seoul, 05006, Republic of Korea. Electronic address:

Metal pollutant adsorbents are an essential material platform for sustainable environmental remediation, but the adsorbents are typically disposable after sorption, which secondarily contaminates the environment. We report on recyclable Cu(II) adsorbent of deprotonated poly-N-phenylglycine nanofibers (d-PPG NFs)-grafted reduced graphene oxide (rGO) sheets intercalated with FeO nanoparticles (NPs), which are synthesized via wet chemical process. The adsorption performances of ternary FeO NPs@rGO-d-PPG NFs and binary FeO NPs@rGO composites are compared, and the ternary ones exhibit much higher Cu-adsorption capacity than binary ones under diverse pH conditions due to both high specific surface area and high cationic affinity of d-PPG NFs that follow the Freundlich adsorption model. Read More

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http://dx.doi.org/10.1016/j.jhazmat.2020.123283DOI Listing

Negative effects on the leaves of submerged macrophyte and associated biofilms growth at high nitrate induced-stress.

Aquat Toxicol 2020 Jul 3;226:105559. Epub 2020 Jul 3.

Ministry of Education Key Laboratory of Integrated Regulation and Resource Development on Shallow Lakes, College of Environment, Hohai University, Nanjing, 210098, China.

High nitrate (NO-N) concentration is a growing aquatic risk concern worldwide. However, adverse effects of high NO-N concentration on submerged macrophytes-epiphytic biofilms are unclear. In this study, the alterations in physiological changes, biofilms formation and chemical compositions were investigated on leaves of Vallisneria asiatica exposed to different NO-N concentrations. Read More

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http://dx.doi.org/10.1016/j.aquatox.2020.105559DOI Listing

Effects of calcium chelation on the neutralization of milk protein isolate and casein micelle reassembling.

Food Chem 2020 Jul 4;332:127440. Epub 2020 Jul 4.

Teagasc Food Research Centre, Moorepark, Fermoy, Co. Cork, Ireland. Electronic address:

Rehydration in an alkaline solution has been shown to improve the rehydration behaviour of milk protein isolate (MPI). In this study, the focus is on citric acid neutralization of MPI powder dissolved in alkaline solution. The results showed that alkalization induced more negative zeta-potential compared to MPI control, reducing it from -22. Read More

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http://dx.doi.org/10.1016/j.foodchem.2020.127440DOI Listing

Natural and nature-inspired stilbenoids as antiviral agents.

Eur J Med Chem 2020 Jul 4;202:112541. Epub 2020 Jul 4.

Department of Food, Environmental and Nutritional Sciences, Università Degli Studi di Milano, Via Celoria 2, 20133, Milano, Italy. Electronic address:

Viruses continue to be a major threat to human health. In the last century, pandemics occurred and resulted in significant mortality and morbidity. Natural products have been largely screened as source of inspiration for new antiviral agents. Read More

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http://dx.doi.org/10.1016/j.ejmech.2020.112541DOI Listing

Fabrication of electrochemical biosensor composed of multi-functional DNA/rhodium nanoplate heterolayer for thyroxine detection in clinical sample.

Colloids Surf B Biointerfaces 2020 Jul 2;195:111240. Epub 2020 Jul 2.

Department of Chemical Engineering, Kwangwoon University, Wolgye-dong, Nowon-gu, Seoul, 01899, Republic of Korea. Electronic address:

Thyroxine (T4) contains four iodine atoms and is a major thyroid hormone synthesized in the thyroid gland. Abnormal levels of T4 in the body cause various endocrine diseases. The present study describes the fabrication of an electrochemical biosensor composed of a multi-functional DNA structure/rhodium nanoplates heterolayer for precise detection of T4 concentration. Read More

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http://dx.doi.org/10.1016/j.colsurfb.2020.111240DOI Listing

Predicting the rate constants of semivolatile organic compounds with hydroxyl radicals and ozone in indoor air.

Environ Pollut 2020 Jun 27;266(Pt 2):115050. Epub 2020 Jun 27.

University of Paris-Est, Scientific and Technical Center for Building (CSTB), Health and Comfort Department, French Indoor Air Quality Observatory (OQAI), 84 Avenue Jean Jaurès, Champs sur Marne, 77447, Marne La Vallée Cedex 2, France.

Semivolatile organic compounds (SVOCs) in air can react with hydroxyl radicals (OH), nitrate radicals (NO) and ozone (O). Two questions regarding SVOC reactivity with OH, NO and O in the gas and particle phases remain to be addressed: according to the existing measurements in the literature, which are the most reactive SVOCs in air, and how can the SVOC reactivity in the gas and particle phases be predicted? In the present study, a literature review of the second-order rate constant (k) was carried out to determine the SVOC reactivity with OH, NO and O in the gas and particle phases in ambient and indoor air at room temperature. Measured k values were available in the literature for 90 polycyclic aromatic hydrocarbons (PAHs), polychlorinated biphenyls (PCBs), organophosphates, dioxins, di(2-ethylhexyl)phthalate (DEHP) and pesticides including pyrifenox, carbamates and terbuthylazine. Read More

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http://dx.doi.org/10.1016/j.envpol.2020.115050DOI Listing

Synthesis of bioactive glass-based coating by plasma electrolytic oxidation: Untangling a new deposition pathway toward titanium implant surfaces.

J Colloid Interface Sci 2020 Jun 29;579:680-698. Epub 2020 Jun 29.

Department of Prosthodontics and Periodontology, Piracicaba Dental School, University of Campinas (UNICAMP), Av. Limeira, 901, Piracicaba, São Paulo 13414-903, Brazil. Electronic address:

Hypothesis: Although bioactive glass (BG) particle coatings were previously developed by different methods, poor particle adhesion to surfaces and reduced biological effects because of glass crystallization have limited their biomedical applications. To overcome this problem, we have untangled, for the first time, plasma electrolytic oxidation (PEO) as a new pathway for the synthesis of bioactive glass-based coating (PEO-BG) on titanium (Ti) materials.

Experiments: Electrolyte solution with bioactive elements (NaSiO-5HO, CHOCa, NaNO, and CHNaOP) was used as a precursor source to obtain a 45S5 bioglass-like composition on a Ti surface by PEO. Read More

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http://dx.doi.org/10.1016/j.jcis.2020.06.102DOI Listing

Sealed pre-carbonization to regulate the porosity and heteroatom sites of biomass derived carbons for lithium-sulfur batteries.

J Colloid Interface Sci 2020 Jul 1;579:667-679. Epub 2020 Jul 1.

School of Environment, Henan Normal University, Xinxiang, Henan 453007, PR China. Electronic address:

Ultrathin carbon sheets with high surface area, abundant mesoporous structure and rich N, O heteroatom doping sites were prepared from puffed rice through unique sealed pre-carbonization. By utilizing them as cathode materials for lithium-sulfur batteries, the in-operando Raman spectra and electrochemical tests indicated that the polysulfides shuttling effect could be substantially suppressed by the physical confinement and chemical adsorption due to these structural advantages. In addition, the well-developed hierarchical porous structure and ultrathin thickness were found to enhance the mass diffusion in the electrode, which increased the ion conductivity within the carbon framework. Read More

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http://dx.doi.org/10.1016/j.jcis.2020.06.068DOI Listing

Design and evaluation a kind of functional biomaterial for bone tissue engineering: Selenium/mesoporous bioactive glass nanospheres.

J Colloid Interface Sci 2020 Jul 1;579:654-666. Epub 2020 Jul 1.

College of Chemistry, Chemical Engineering and Materials Science, Soochow University, Suzhou 215123, People's Republic of China. Electronic address:

Conventional treatments of bone tumor involve removal followed by radiation and chemotherapeutic drugs that may have limitations and cause secondary damage. The development of functional filling biomaterial has led to a new strategy for tumor therapy. In this study, a novel therapeutic ion selenium doped mesoporous bioactive glasses (Se/MBG) nanospheres were successfully synthesized by a facile sol-gel technique using cetyl trimethyl ammonium bromide (CTAB) as the template, which had uniform spherical morphology (≈ 400 nm), high surface area (>400 m/g) and mesopore volume (≈0. Read More

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http://dx.doi.org/10.1016/j.jcis.2020.06.122DOI Listing

Stretching force constants as descriptors of energy and geometry of F···HF hydrogen bonds.

Spectrochim Acta A Mol Biomol Spectrosc 2020 Jul 3;241:118677. Epub 2020 Jul 3.

Institute of Chemistry, St. Petersburg State University, 26 Universitetskii pr., Petergof, St. Petersburg 198504, Russia. Electronic address:

In this work applicability of proton donor group stretching vibration force constants k and intermolecular stretching force constants k for evaluations of hydrogen bond strength and geometry are discussed. For a set of 30 complexes with F···HF hydrogen bonds in a wide range 0.5-48 kcal/mol by means of quantum chemical calculations equilibrium geometries, complexation energies, vibrational frequencies and corresponding force constants were calculated (MP2/aug-cc-pVTZ). Read More

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http://dx.doi.org/10.1016/j.saa.2020.118677DOI Listing

Synthesis, characterization, photoluminescence, antiproliferative activity, and DNA interaction of cadmium(II) substituted 4'-phenyl-terpyridine compounds.

J Inorg Biochem 2020 Jun 25;210:111165. Epub 2020 Jun 25.

School of Chemistry and Chemical Engineering, Guangxi University, 530004 Nanning, Guangxi, People's Republic of China; Centro de Química Estrutural, Instituto Superior Técnico, Universidade de Lisboa, Av. Rovisco Pais, 1049-001 Lisbon, Portugal. Electronic address:

A series of CdCl complexes (1a-1f and 2a-2c) with 4'-(substituted-phenyl)-2,2':6',2″-terpyridine compounds bearing hydrogen (L), p-methyl (L), p-phenyl (L), p-tolyl (L), p-carboxyl (L), p-fluoro (L), p-hydroxyl (L), m-hydroxyl (L) or o-hydroxyl (L), were prepared and characterized by H NMR, IR, elemental analysis and single crystal X-ray diffraction. All the compounds display interesting photoluminescent properties and different maximal emission peaks due to the difference of the substituent groups. The in vitro antiproliferative activities against four human carcinoma cell lines, A549, Bel-7402, Eca-109 and MCF-7, were investigated and cell viability studies indicate that the compounds have excellent results with the lowest IC values of 0. Read More

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http://dx.doi.org/10.1016/j.jinorgbio.2020.111165DOI Listing

Synthesis and enhanced antioxidant and membrane-protective activity of curcumin@AlOOH nanoparticles.

J Inorg Biochem 2020 Jul 2;210:111168. Epub 2020 Jul 2.

Institute of Biology, Komi Science Centre, Ural Branch of Russian Academy of Sciences, 167982, 28 Kommunisticheskaya St., Syktyvkar, Russia.

The ever increasing demand for nanoantioxidants with minimized toxicity dictates the necessity to develop new biocompatible materials. One promising approach is the immobilization of polyphenols on metal (oxy)hydroxide nanoparticles (NPs) that possess the desired chemical and colloidal stability while also allowing to dispose of the antioxidants more safely and effectively. In this paper we modify sol-gel synthesized γ-AlOOH NPs with curcumin molecules. Read More

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http://dx.doi.org/10.1016/j.jinorgbio.2020.111168DOI Listing

Development, evaluation and effect of anionic co-ligand on the biological activity of benzothiazole derived copper(II) complexes.

J Inorg Biochem 2020 Jul 3;210:111174. Epub 2020 Jul 3.

Department of Chemistry, School of Chemical Sciences and Pharmacy, Central University of Rajasthan, Bandarsindri, District Ajmer, Rajasthan 305817, India. Electronic address:

Research on development of novel metal based anti-cancer agents continues with its popularity among bioinorganic community. Benzothiazole, an important heterocyclic pharmacophore, was chosen as a valuable and useful scaffold for the synthesis of novel copper(II) complexes. Three new copper(II) complexes obtained from the synthesis of newly synthesized benzothiazole based N-(benzo[d]thiazol-2-ylmethyl)-N-methyl-2-(pyridin-2-yl)ethan-1-amine (btzpy) ligand with CuCl [Cu(btzpy)Cl] (1), Cu(NCS) [Cu(btzpy)(NCS)] (2), and Cu(NO) [Cu(btzpy)(NO)(HO)]NO (3) were isolated and characterized by physical and spectroscopic measurements, including single-crystal X-ray structures. Read More

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http://dx.doi.org/10.1016/j.jinorgbio.2020.111174DOI Listing

Decontamination and reuse of N95 filtering facemask respirators: a systematic review of the literature.

Am J Infect Control 2020 Jul 8. Epub 2020 Jul 8.

Scientific Direction, Clínica de Marly Jorge Cavelier Gaviria. Avenida Paseo los Zipas, Cl. 29, Chía, Colombia. Electronic address:

Introduction: As has happened in other emerging respiratory pandemics, demand for N95 filtering facemask respirators (FFRs) has far exceeded their manufacturing production and availability in the context of the SARS-CoV-2 pandemic. One of the proposed strategies for mitigating the massive demand for N95 FFRs is their reuse after a process of decontamination that allows the inactivation of any potentially infectious material on their surfaces. This article aims to summarize all of the available evidence on the different decontamination methods that might allow disposable N95 FFRs to be reused, with emphasis on decontamination from SARS-CoV-2. Read More

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http://dx.doi.org/10.1016/j.ajic.2020.07.004DOI Listing

Lack of sensitivity of an IVD/CE-labeled kit targeting the S gene for detection of SARS-CoV-2.

Clin Microbiol Infect 2020 Jul 8. Epub 2020 Jul 8.

Diagnostic & Research Institute of Hygiene, Microbiology and Environmental Medicine, Medical University of Graz, Graz, Austria.

Objectives: New molecular tests for SARS-CoV-2 are rapidly launched in response to the COVID-19 pandemic. The aim of this study was to evaluate the analytical and the clinical performance of the VIASURE SARS-CoV-2 S gene RT-PCR Kit on the BD Max™ system and to compare results with those obtained with the cobas® SARS-CoV-2 test on the cobas® 6800 system.

Methods: For testing the analytical performance, reference material was used. Read More

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http://dx.doi.org/10.1016/j.cmi.2020.06.036DOI Listing

Caudicles in Vandoid Orchids: A Carotenoid-Based Soft Material with Unique Properties.

Acta Biomater 2020 Jul 8. Epub 2020 Jul 8.

State Key Laboratory of Turbulence and Complex Systems, Department of Mechanics and Engineering Science, BIC-ESAT, College of Engineering, Peking University, Beijing, 100871, People's Republic of China; CAPT, HEDPS and IFSA Collaborative Innovation Center of MoE, Peking University, Beijing, 100871, People's Republic of China. Electronic address:

130 years ago, Darwin observed that caudicles in vandoid orchids possess considerable elasticity and further hypothesized that their elasticity serves to improve pollination efficiency. However, there has been no study that seeks to either quantitatively backup Darwin's hypothesis or characterize this natural material for practical use. Here we show that vandoid caudicles are a novel kind of soft material with extremely high extensibility (1190%), low modulus (160 kPa) and density lower than that of water. Read More

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http://dx.doi.org/10.1016/j.actbio.2020.07.005DOI Listing

Dimerization-Induced Self-Assembly of a Redox-Responsive Prodrug into Nanoparticles for Improved Therapeutic Index.

Acta Biomater 2020 Jul 8. Epub 2020 Jul 8.

The First Affiliated Hospital; Key Laboratory of Combined Multi-Organ Transplantation, Ministry of Public Health; School of Medicine, Zhejiang University, Hangzhou, 310003, PR China. Electronic address:

Although some formats of nanomedicines are now available for clinical use, the translation of new nanoparticles to the clinic remains a considerable challenge. Here, we describe a simple yet cost-effective strategy that converts a toxic drug, cabazitaxel, into a safe and effective nanomedicine. The strategy involves the ligation of drug molecules via a self-immolating spacer, followed by dimerization-induced self-assembly to assemble stable nanoparticles. Read More

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http://dx.doi.org/10.1016/j.actbio.2020.07.007DOI Listing

Dry heat and microwave generated steam protocols for the rapid decontamination of respiratory personal protective equipment in response to COVID-19-related shortages.

J Hosp Infect 2020 Jul 8. Epub 2020 Jul 8.

Cardiff School of Pharmacy and Pharmaceutical Sciences, Cardiff University, Cardiff, Wales, UK. Electronic address:

Background: In the wake of SARS-CoV-2 pandemic and unprecedented global demand, clinicians are struggling to source adequate access to personal protective equipment. Respirators can be in short supply, though are necessary to protect workers from SARS-CoV-2 exposure. Rapid decontamination and reuse of respirators may provide relief for the strained procurement situation. Read More

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http://dx.doi.org/10.1016/j.jhin.2020.07.008DOI Listing

Brief stress impairs recognition memory through amygdalar activation in animals with medial prefrontal cortex lesions.

Neurosci Lett 2020 Jul 8:135245. Epub 2020 Jul 8.

Department of Biological Sciences, Konkuk University, Seoul, 05029, Republic of Korea. Electronic address:

The medial prefrontal cortex (mPFC) is thought to exert inhibitory control over stress-induced activation of the amygdala and neurocognitive effects. As evidence to support this, we examined how exposure to either a brief or prolonged stress affected on amygdalar c-Fos levels and recognition memory of animals with mPFC chemical lesions. mPFC-lesioned and sham-operated animals were subjected to either a brief 20-min restraint+20 tailshocks or a prolonged 60-min restraint+60 tailshocks. Read More

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http://dx.doi.org/10.1016/j.neulet.2020.135245DOI Listing

Development of Low Dose Micro-tablets by High Shear Wet Granulation Process.

Int J Pharm 2020 Jul 8:119571. Epub 2020 Jul 8.

Drug Product Development, Bristol Myers Squibb, 181 Passaic Avenue, Summit, NJ-07901, USA. Electronic address:

Low dose micro-tablets with acceptable quality attributes, specifically content uniformity (CU), would not only enhance the dose flexibility in the clinic, but also decrease excipient burden in pediatric population. Considering the CU challenges associated with directly compressed low dose micro-tablets, in this study, high shear wet granulation (HSWG) process was evaluated to manufacture micro-tablets with reduced CU variability. The impact of active pharmaceutical ingredient (API) particle size (D - 18-180 µm) and loading (0. Read More

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http://dx.doi.org/10.1016/j.ijpharm.2020.119571DOI Listing

In vivo assessment of cell death and nigrostriatal pathway integrity following continuous expression of C3 transferase.

Neuroscience 2020 Jul 8. Epub 2020 Jul 8.

Department of Neurosurgery, United States. Electronic address:

The bacterial exoenzyme C3 transferase (C3) irreversibly inhibits RhoA GTPase leading to stimulation of axonal outgrowth in injured neurons. C3 has been used successfully in models of neurotrauma and shows promise as an option to support cell survival and axonal growth of dopaminergic neurons in Parkinson's disease cell therapy. Whether the continuous expression of C3 in dopaminergic neurons is well-tolerated is unknown. Read More

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http://dx.doi.org/10.1016/j.neuroscience.2020.07.006DOI Listing

SAFETY AND EFFICACY OF ANTI-IL6-RECEPTOR TOCILIZUMAB USE IN SEVERE AND CRITICAL PATIENTS AFFECTED BY CORONAVIRUS DISEASE 2019: A COMPARATIVE ANALYSIS.

J Infect 2020 Jul 8. Epub 2020 Jul 8.

Infectious Diseases Unit, ASST Grande Ospedale Metropolitano Niguarda, Milan, Italy.

Background: As the novel SARS-CoV-2 pandemic occurred, no specific treatment was yet available. Inflammatory response secondary to viral infection might be the driver of severe diseases. We report the safety and efficacy (in terms of overall survival and hospital discharge) of the anti-IL6 tocilizumab (TCZ) in subjects with COVID-19. Read More

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http://dx.doi.org/10.1016/j.jinf.2020.07.008DOI Listing

The unique structure of bacterial polysaccharides - Immunochemical studies on the O-antigen of Proteus penneri 4034-85 clinical strain classified into a new O83 Proteus serogroup.

Int J Biol Macromol 2020 Jul 8. Epub 2020 Jul 8.

N. D. Zelinsky Institute of Organic Chemistry, Russian Academy of Sciences, Leninsky Prospekt 47, 119991 Moscow, Russia.

The serological classification scheme of the opportunistic Proteus bacilli includes a number of Proteus penneri strains. The tested P. penneri 4034-85 strain turned out to be serologically distinguished in ELISA and Western blotting. Read More

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http://dx.doi.org/10.1016/j.ijbiomac.2020.07.012DOI Listing

Mesoporous biohybrid epichlorohydrin crosslinked chitosan/carbon-clay adsorbent for effective cationic and anionic dyes adsorption.

Int J Biol Macromol 2020 Jul 8. Epub 2020 Jul 8.

Department of Biotechnology, College of Science, University of Diyala, Baqubah, Iraq.

Epichlorohydrin crosslinked chitosan/carbon-clay (CSCC) biohybrid adsorbent was prepared for the adsorption of cationic methylene blue (MB) and anionic azo acid blue 29 (AB 29). The 40:60 wt% of chitosan (CS) and carbon-clay (CC) was selected as the best biohybrid adsorbent (CS40CC60) for the adsorption of both dyes. The adsorption of MB and AB 29 on CS40CC60 was carried out in a batch process to investigate the effects of initial dye concentration (25-400 mg/L), initial pH (3-11), contact time and adsorption temperature (30, 40 and 50 °C). Read More

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http://dx.doi.org/10.1016/j.ijbiomac.2020.07.032DOI Listing

Antibacterial and cytotoxic properties from esterified Sterculia gum.

Int J Biol Macromol 2020 Jul 8. Epub 2020 Jul 8.

Biotechnology and Biodiversity Center Research, Federal University of the Parnaíba Delta, Parnaíba, PI 64202-020, Brazil. Electronic address:

Sterculia gums, as karaya and chicha gum, are complex branched and polydisperse heteropolysaccharides which can have their applications extended by improving their characteristics through chemical modifications. The objective of this work was to increase the antimicrobial activity of karaya and chicha gum through chemical modification with maleic anhydride. The incorporation of anhydride in the gum structure was confirmed by the characterization techniques. Read More

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http://dx.doi.org/10.1016/j.ijbiomac.2020.07.031DOI Listing

Galantamine improves enhanced impulsivity, impairments of attention and long-term potentiation induced by prenatal nicotine exposure to mice.

Biochem Pharmacol 2020 Jul 8:114139. Epub 2020 Jul 8.

Advanced Diagnostic System Research Laboratory, Graduate School of Health Sciences, Fujita Health University, Toyoake, Japan; Japanese Drug Organization of Appropriate Use and Research, Nagoya, Japan.

Prenatal nicotine exposure (PNE) causes behavioral abnormalities in offspring, such as an enhancement of impulsivity and decrease in attention at adolescence. Here we examined the effects of galantamine (GAL) on the behavioral and electrophysiological changes induced by PNE in mice. Pregnant C57BL/6J mice were exposed to nicotine (0. Read More

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http://dx.doi.org/10.1016/j.bcp.2020.114139DOI Listing
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