Silver nanoparticles as a new generation of antimicrobials.

http://users.encs.concordia.ca/~mojtaba/elec6271/silver%20nanoparticles.pdf

Silver nanoparticles: green synthesis and their antimicrobial activities.

Here, we present a review of the antibacterial effects of silver nanomaterials, including proposed antibacterial mechanisms and possible toxicity to higher organisms. For purpose of this review, silver nanomaterials include silver nanoparticles, stabilized silver salts, silver–dendrimer, polymer and metal oxide composites, and silver-impregnated zeolite and activated carbon materials. While there is some evidence that silver nanoparticles can directly damage bacteria cell membranes, silver nanomaterials appear to exert bacteriocidal activity predominantly through release of silver ions followed (individually or in combination) by increased membrane permeability, loss of the proton motive force, inducing de-energization of the cells and efflux of phosphate, leakage of cellular content, and disruption DNA replication. Eukaryotic cells could be similarly impacted by most of these mechanisms and, indeed, a small but growing body of literature supports this concern. Most antimicrobial studies are performed in simple aquatic media or cell culture media without proper characterization of silver nanomaterial stability (aggregation, dissolution, and re-precipitation). Silver nanoparticle stability is governed by particle size, shape, and capping agents as well as solution pH, ionic strength, specific ions and ligands, and organic macromolecules—all of which influence silver nanoparticle stability and bioavailability. Although none of the studies reviewed definitively proved any immediate impacts to human health or the environment by a silver nanomaterial containing product, the entirety of the science reviewed suggests some caution and further research are warranted given the already widespread and rapidly growing use of silver nanomaterials.

https://link.springer.com/content/pdf/10.1007%2Fs11051-010-9900-y.pdf

A review of the antibacterial effects of silver nanomaterials and potential implications for human health and the environment

The purpose of this critical review is to give a representative and comprehensive overview of the arising developments in the field of magnetic metal–organic frameworks, in particular those containing cobalt(II). We examine the diversity of magnetic exchange interactions between nearest-neighbour moment carriers, covering from dimers to oligomers and discuss their implications in infinite chains, layers and networks, having a variety of topologies. We progress to the different forms of short-range magnetic ordering, giving rise to single-molecule-magnets and single-chain-magnets, to long-range ordering of two- and three-dimensional networks (323 references).

Magnetic metal-organic frameworks.

Although known since the late 19th century, organic–inorganic perovskites have recently received extraordinary research community attention because of their unique physical properties, which make them promising candidates for application in photovoltaic (PV) and related optoelectronic devices. This review will explore beyond the current focus on three-dimensional (3-D) lead(II) halide perovskites, to highlight the great chemical flexibility and outstanding potential of the broader class of 3-D and lower dimensional organic-based perovskite family for electronic, optical, and energy-based applications as well as fundamental research. The concept of a multifunctional organic–inorganic hybrid, in which the organic and inorganic structural components provide intentional, unique, and hopefully synergistic features to the compound, represents an important contemporary target.

Organic–Inorganic Perovskites: Structural Versatility for Functional Materials Design

Objective: Breastfeeding (BF) has been accepted as the most vital intervention for reducing infant mortality and ensuring optimal growth and development of a child. A major barrier to successful BF is inconsistency in information and improper cultural practices. To assess the knowledge, attitude, and practices toward BF among nursing mothers following up in a tertiary care center in Navi Mumbai, Maharashtra. Methods: A community-based cross-sectional study was conducted among 512 mothers in Navi Mumbai in the state of Maharashtra, India, between January 2016 and June 2016 using a pre-set questionnaire. The mothers with children under the age of 2 years were interviewed following which descriptive statistics were obtained. Results: Our study highlights the growing awareness of the advantages of BF. Of the 512 mothers enrolled in our study, 78.9% believed in exclusive BF (EBF) till 6 months while 51% actually practiced EBF. Nearly 78% mothers felt shy to feed in public places. BF was initiated <1 h of delivery in 35.9% mothers while insufficient milk was the predominant reason (41.4%) in mothers to stop BF before 2 years. Conclusion: The majority of our participants had adequate knowledge and a positive attitude toward EBF, with right posture practiced while feeding.

/pdf/knowledge-attitude-and-practices-of-nursing-mothers-toward-18qzawd3aa.pdf

Knowledge, attitude, and practices of nursing mothers toward breastfeeding in a tertiary care center in Navi Mumbai

Systems and methods for reducing leakage power in a L2 cache within a SoC. The L2 cache is partitioned into multiple banks, and each bank has its own separate power supply. An idle counter is maintained for each bank to count a number of cycles during which the bank has been inactive. The temperature and leaky factor of the SoC are used to select an operating point of the SoC. Based on the operating point, an idle counter threshold is set, with a high temperature and high leaky factor corresponding to a relatively low idle counter threshold, and with a low temperature and low leaky factor corresponding to a relatively high idle counter threshold. When a given idle counter exceeds the idle counter threshold, the voltage supplied to the corresponding bank is reduced to a voltage sufficient for retention of data but not for access.

L2 cache retention mode

An apparatus for processing cache requests in a computing system is disclosed. The apparatus may include a pending request buffer and a control circuit. The pending request buffer may include a plurality of buffer entries. The control circuit may be coupled to the pending request buffer and may be configured to receive a request for a first cache line from a pre-fetch engine, and store the received request in an entry of the pending request buffer. The control circuit may be further configured to receive a request for a second cache line from a processor, and store the request received from the processor in the entry of the pending request buffer in response to a determination that the second cache line is the same as the first cache line.

Cache pre-fetch merge in pending request buffer

Schizophrenia mental disorder is the combination of psychotic and neurotic disorder where the clinical symptoms and signs, duration and cognitive adjectives are well defined. In this, pharmacological treatments are existing successfully, even though they are likely relieving pain without dealing with the cause of the condition. The most risky constituents for schizophrenia are genetics and formational and operative abnormalities of brain. These factors are precautionable by the scientists by innovating new genetic information in the human genome and brain imaging techniques which direct inquiries the structural functionality of neurochemistry. Dopamine role does not ignore in current assumption of pathophysiology but it emphasizes the integration of neural systems in the expression of illness and symptoms generating in limbic system. Advanced observations for futuristic discovery are arising from the combination of molecular genetics and brain imaging techniques.

Schizophrenia: unraveling the labyrinth of etiology and epidemiology

The proposed work is to study a standardized and ob jective technique to assess the progress of wound h ealing in foot by means of texture analysis. The methods of i mage pre-processing, segmentation and texture analy sis together with visual expert’s evaluation were used to assess the wound healing process. The images were intensi ty normalized, and wounds were automatic segmented usi ng a snake’s segmentation system. We found texture characteristics that may indicate the progression o f wound healing process. More specifically, some te xture features increase (mean, contrast), while some other texture features decrease (entropy, sum of squares varianc e, sum average, sum variance) with the progression of the wound healing process. Some of these features were found to be significantly different in a specific time point and this could be used to indicate the rate of wound healing. No significant differences were found for all geometri cal measures. The results of this study suggest tha t some texture features might be used to monitor the wound healing process, thus reducing the workload of experts, pr ovide standardization, reduce costs, and improve the qual ity for patients. The simplicity of the method also suggests that it may be a valuable tool in clinical wound evaluation .

/pdf/evaluation-of-wound-healing-process-based-on-texture-2eja7pafiw.pdf

Prashant Jain

Papers

Knowledge, attitude, and practices of nursing mothers toward breastfeeding in a tertiary care center in Navi Mumbai

L2 cache retention mode

Cache pre-fetch merge in pending request buffer

Schizophrenia: unraveling the labyrinth of etiology and epidemiology

Evaluation of wound healing process based on texture analysis