Medical effects of poly-ethylene terephthalate (PET) non-woven fabrics treated with bamboo activated charcoal

In this study, bamboo activated charcoal was mixed with acrylic resin in various proportions and deposited on poly-ethylene terephthalate (PET) non-woven fabrics. A series of characterizations were carried out to estimate the performances of PET non-woven fabrics such as far infrared ray emission, heat retention, negative ions, deodorization of ammonia gas and tenacity. The results obtained indicate that the temperature difference on the surface of treated non-woven fabrics after exposure to a halogen lamp was between 4.28 to 8.26°C. The test for negative ions demonstrated that the concentration of negative ions released from treated non-woven fabrics was 420 to 630 ions/cm3. The deodorization rate of the treated non-woven fabrics was found to be between 85 to 92% and the rate was the same for 5 and 10 g/L of bamboo activated charcoal addition. An increase in resin concentration increased the abrasion strength and tensile strength; and reduced the tear strength of the treated non-woven fabrics. The bamboo activated charcoal concentration exhibited no effect on the physical properties of the treated non-woven fabrics.Key words: Poly-ethylene terephthalate (PET), non-woven fabrics, bamboo activated charcoal, far infrared ray, negative ions, deodorization

D-Instanton in AdS_5 and Instanton in SYM_4

Following the observation of Banks and Green that the D-instantons in AdS_5 correspond to the instantons in 4-dimensional supersymmetric Yang-Mills theory, we study in more detail this correspondence for individual instantons. The supergravity solution for a D-instanton in AdS_5 is found using the ansatz used previously for D-instantons in flat space. We check that the actions and supersymmetries match between the D-instanton solution and the Yang-Mills instanton. Generalizing this result, we propose that any supergravity solution satisfying the ansatz corresponds to a (anti-)self-dual Yang-Mills configuration. Using this ansatz a family of identities for correlation functions in the supersymmetric Yang-Mills theory are derived.Comment: LaTeX, 19 pages, no figure, some typos correcte

Enhancement of radiosensitivity in human glioblastoma cells by the DNA N-mustard alkylating agent BO-1051 through augmented and sustained DNA damage response

<p>Abstract</p> <p>Background</p> <p>1-{4-[Bis(2-chloroethyl)amino]phenyl}-3-[2-methyl-5-(4-methylacridin-9-ylamino)phenyl]urea (BO-1051) is an N-mustard DNA alkylating agent reported to exhibit antitumor activity. Here we further investigate the effects of this compound on radiation responses of human gliomas, which are notorious for the high resistance to radiotherapy.</p> <p>Methods</p> <p>The clonogenic assay was used to determine the IC₅₀and radiosensitivity of human glioma cell lines (U87MG, U251MG and GBM-3) following BO-1051. DNA histogram and propidium iodide-Annexin V staining were used to determine the cell cycle distribution and the apoptosis, respectively. DNA damage and repair state were determined by γ-H2AX foci, and mitotic catastrophe was measure using nuclear fragmentation. Xenograft tumors were measured with a caliper, and the survival rate was determined using Kaplan-Meier method.</p> <p>Results</p> <p>BO-1051 inhibited growth of human gliomas in a dose- and time-dependent manner. Using the dosage at IC₅₀, BO-1051 significantly enhanced radiosensitivity to different extents [The sensitizer enhancement ratio was between 1.24 and 1.50 at 10% of survival fraction]. The radiosensitive G₂/M population was raised by BO-1051, whereas apoptosis and mitotic catastrophe were not affected. γ-H2AX foci was greatly increased and sustained by combined BO-1051 and γ-rays, suggested that DNA damage or repair capacity was impaired during treatment. <it>In vivo </it>studies further demonstrated that BO-1051 enhanced the radiotherapeutic effects on GBM-3-beared xenograft tumors, by which the sensitizer enhancement ratio was 1.97. The survival rate of treated mice was also increased accordingly.</p> <p>Conclusions</p> <p>These results indicate that BO-1051 can effectively enhance glioma cell radiosensitivity <it>in vitro </it>and <it>in vivo</it>. It suggests that BO-1051 is a potent radiosensitizer for treating human glioma cells.</p

Upconversion Plasmonic Lasing from an Organolead Trihalide Perovskite Nanocrystal with Low Threshold

The understanding of nonlinear light–matter interactions at the nanoscale has fueled worldwide interest in upconversion emission for imaging, lasing, and sensing. Upconversion lasers with anti-Stokes-type emission with various designs have been reported. However, reducing the volume and lasing threshold of such lasers to the nanoscale level is a fundamental photonics challenge. Here, we demonstrate that the upconversion efficiency can be improved by exploiting single-mode upconversion lasing from a single organo-lead halide perovskite nanocrystal in a resonance-adjustable plasmonic nanocavity. This upconversion plasmonic nanolaser has a very low lasing threshold (10 μJ cm⁻²) and a calculated ultrasmall mode volume (∼0.06 λ³) at 6 K. To provide the unique feature for lasing action, a temporal coherence signature of the upconversion plasmonic nanolasing was determined by measuring the second-order correlation function. The localized-electromagnetic-field confinement can be tailored in titanium nitride resonance-adjustable nanocavities, enhancing the pump-photon absorption and upconverted photon emission rate to achieve lasing. The proof-of-concept results significantly expand the performance of upconversion nanolasers, which are useful in applications such as on-chip, coherent, nonlinear optics, information processing, data storage, and sensing

菊花花蕾培植體利用農桿菌轉殖花色基因後之再生

The lethal rate of leaf explants in Chrysanthemum ‘Pink Flame', ‘Red windmill',‘Margenta Linker'and ‘Linker'was up to 100％ when they were cultured in medium containing hygromycin at 25 mg/L. When hygromycin in medium decreased to 20 mg/L, the leathal rate was still over 87％. As well as they were cultured on 15 mg/L hygromycin medium, the lethal rate was over 80％, except ‘Margenta Linker'explants (66％). Floral expalnts with involucre were easier browning and relapsing than those without involucre. And the whole receptacle explants regenerated more shoots than parts of receptacle explants were easier browning and relapsing than those without involucre. And the whole receptacle explants regenerated more shoots than parts of receptacle explants regenerated. In addition, flower bud with 1cm ray florets had higher survival rate. After transforming pigment gene by Agrobacterium tumefacien-mediated, flower bud explants were more survival and less relapsing, and regenerated more shoots. Each receptacle explant of chrysanthemum of ‘Red windmill'and ‘Linker'regenerated 0.76 and 0.33, respectively. The regeneration efficiency of receptacle was higher than leaf and petiole explant.菊花'Red Windmill'、'Pink Flame'、'Linker'、'Margenta Linker'葉片培殖體培養在含hygromycin之培養基時，當hygromycin濃度達25mg/L時，死亡率達到l00%;濃度為20mg/L時，致死率仍達到87%以上;濃度在l0mg/L時，除。Margenta Linke，，培殖體致死率為66%外，其他品種致死率均達到80%以上。不同花蕾培殖體型式轉殖花色基因後再生情況，發現以完整總花托再生芽體情況最佳，其次分別為包括總苞之花蕾上半部組織或總花托之上半部。但包括總苞組織，轉殖花色基因後培植體褐化率、農桿菌復發程度均為最高。以花瓣尖端著色但未超過lcm的花蕾作為培殖體，存活培殖體數量較總苞未展開或花瓣伸長大於lcm者多。菊花器官培殖體經農桿菌轉殖花色基因後，發現以花蕾培殖體存活率較高，農桿菌復發率較低，再生芽體數量較多。培殖體使用莖段或小花梗經農桿菌轉殖花色基因後，均無法再生芽體。'Red Windmill'和'Linker'轉殖花色基因後，每月花蕾培殖體再生芽體數量分別為0.76與033，高於葉片及葉柄培殖體