다중혈관 관상동맥 환자에서 y-문합을 이용하여 양쪽 내흉동맥만을 사용한 우회술의 조기 성적

[신간의 별자리x] 우리/미술, 그리고 ‘슬픔의 박물관’

『Google Scholar』の利点

As an emerging clinical modality for cancer treatment, photodynamic therapy (PDT) takes advantage of the cytotoxic activity of reactive oxygen species (ROS) that are generated by light irradiating photosensitizers (PSs) in the presence of oxygen (O2 ). However, further advancements including tumor selectivity and ROS generation efficiency are still required. Substantial efforts are devoted to design and synthesize smart PSs with optimized properties for achieving a desirable therapeutic efficacy. This review summarizes the recent progress in developing intelligent PSs for efficient PDT, ranging from single molecules to delicate nanomaterials. The strategies to improve ROS generation through optimizing photoinduced electron transfer and energy transfer processes of PSs are highlighted. Moreover, the approaches that combine PDT with other therapeutics (e.g., chemotherapy, photothermal therapy, and radiotherapy) and the targeted delivery in cancer cells or tumor tissue are introduced. The main challenges for the clinical application of PSs are also discussed.

Photosensitizers for Photodynamic Therapy

Over the past few years, nanocellulose (NC), cellulose in the form of nanostructures, has been proved to be one of the most prominent green materials of modern times. NC materials have gained growing interests owing to their attractive and excellent characteristics such as abundance, high aspect ratio, better mechanical properties, renewability, and biocompatibility. The abundant hydroxyl functional groups allow a wide range of functionalizations via chemical reactions, leading to developing various materials with tunable features. In this review, recent advances in the preparation, modification, and emerging application of nanocellulose, especially cellulose nanocrystals (CNCs), are described and discussed based on the analysis of the latest investigations (particularly for the reports of the past 3 years). We start with a concise background of cellulose, its structural organization as well as the nomenclature of cellulose nanomaterials for beginners in this field. Then, different experimental procedures for the production of nanocelluloses, their properties, and functionalization approaches were elaborated. Furthermore, a number of recent and emerging uses of nanocellulose in nanocomposites, Pickering emulsifiers, wood adhesives, wastewater treatment, as well as in new evolving biomedical applications are presented. Finally, the challenges and opportunities of NC-based emerging materials are discussed.

/pdf/nanocellulose-from-fundamentals-to-advanced-applications-ecdehj4ngu.pdf

Nanocellulose: From Fundamentals to Advanced Applications

https://cyberleninka.org/article/n/1038964.pdf

Biological activities of curcuminoids, other biomolecules from turmeric and their derivatives – A review

Biobased polymers are considered as promising alteration for conventional synthetic plastics from fossil fuels to recompense draining petroleum based products which addresses several environmental issues. Briefly, cellulose nanofibers were isolated from pineapple leaf and the quality of prepared nanofibers were characterized using advanced instrumental technologies. Poor mechanical, barrier properties and hygroscopic nature are notable issues which drops shelf life of starch based films that can be rectified by the addition of nanoscale fillers. The impact of filler reinforcement on the films were investigated in different aspects. Morphology, UV shielding, wettability and thermal degradation were carefully analysed using Polarised optical microscopy, UV-vis spectroscopy, static water contact angle, thermal gravimetric analysis respectively. Water contact angle increases from neat TPS to nanocomposites with 3 wt.% of CNF (41.250 to 51.770) and water vapour permeability decreases from 7.32 gmm−2d−1kPa−1 to 5.68 gmm−2d−1kPa−1 for 3 wt. % CNF loading. Also, several enhanced properties were observed for final product quality with respect to the reference sample which includes, potato starch/ cellulose nanocomposite films were found to be UV resistant, higher transparency indicates the nanoscale dispersion. Further studies were anticipated to develop the materials in industrial scale.

UV resistant transparent bionanocomposite films based on potato starch/cellulose for sustainable packaging†

General scenarios of cellulose and its use in the biomedical field

Chitin nanowhiskers (ChNW) were extracted from shrimp shell and subjected to alkali, bleaching and acid hydrolysis treatment. The Fourier transform infrared (FTIR) spectra confirmed the functional group moieties present at each stage of the purification process. The X-ray diffraction (XRD) analysis determined the crystallinity of the ChNW. The scanning electron microscopic (SEM), transmission electron microscopic (TEM) and atomic force microscopic (AFM) studies were carried out to examine and compare the morphology of the products at each stage of purification. The synthesized ChNW were used for the crystal violet adsorption studies. Along with ChNW, a series of adsorbent materials like chitin-Fe 3 O 4 , cellulose, and cellulose − Fe 3 O 4 were used for comparing the results and for the better understanding of adsorption phenomena. The absorbance of the solution during a time interval was investigated using UV–vis spectrophotometry. The prepared ChNW showed higher removal efficiency (79.13%) and adsorption capacity (39.56 mg g −1 ) compared to other adsorbents. The results proved that ChNW can be a potential candidate for the removal of crystal violet from contaminated water.

Sreerag Gopi

Papers

Biological activities of curcuminoids, other biomolecules from turmeric and their derivatives – A review

UV resistant transparent bionanocomposite films based on potato starch/cellulose for sustainable packaging†

General scenarios of cellulose and its use in the biomedical field

Enhanced adsorption of crystal violet by synthesized and characterized chitin nano whiskers from shrimp shell

Chitin nanowhisker (ChNW)-functionalized electrospun PVDF membrane for enhanced removal of Indigo carmine.