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Chemical design of onion-like carbon-silicon diimide polymer composites 类洋葱碳硅二亚胺聚合物复合材料的化学设计
Experimental Results Pub Date : 2021-08-20 DOI: 10.1017/exp.2021.13
Kaili Wang, Gabriela Mera
{"title":"Chemical design of onion-like carbon-silicon diimide polymer composites","authors":"Kaili Wang, Gabriela Mera","doi":"10.1017/exp.2021.13","DOIUrl":"https://doi.org/10.1017/exp.2021.13","url":null,"abstract":"Abstract Herein, we report the synthesis and characterization of a novel class of polymer composites based on onion-like carbons (OLCs)-silicon diimide by a salt-free polycondensation reaction. The pyridine-catalyzed polymerization reaction was carried out in the presence of various contents (0.1, 0.5, 1, and 2 wt%) of carboxyl-functionalized OLCs in argon atmosphere to provide composites with well-dispersed and covalently incorporated 0D nanocarbons throughout the 3D matrix of silicon diimide polymer. A strong dependency of the optical properties (UV absorbance and the photoluminescence spectra) on the content of functionalized OLCs incorporated within the polymer matrix was observed. The novel polymer composites are suitable precursors for the design of advanced and multifunctional 0D-nanocarbon–containing Si3N4-based ceramic nanocomposites.","PeriodicalId":12269,"journal":{"name":"Experimental Results","volume":"273 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2021-08-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"75782355","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Characterization of Philippine natural bentonite 菲律宾天然膨润土的表征
Experimental Results Pub Date : 2021-08-19 DOI: 10.1017/exp.2021.16
Eleanor M. Olegario, M. Gili
{"title":"Characterization of Philippine natural bentonite","authors":"Eleanor M. Olegario, M. Gili","doi":"10.1017/exp.2021.16","DOIUrl":"https://doi.org/10.1017/exp.2021.16","url":null,"abstract":"Abstract Philippine natural bentonite is characterized using X-ray diffractometer (XRD), scanning electron microscope (SEM), chemical analysis, thermogravimetric-differential scanning calorimetry (TG-DSC), and Fourier transform infrared (FTIR) analysis. The cation exchange capacity (CEC) was also measured. XRD shows that the mineral is composed primarily of mordenite, hectorite, and montmorillonite. SEM shows the flaky and porous structure of the bentonite powder. Chemical analyses show that SiO2 (47.90 wt%) and Al2O3 (14.02 wt%) are the major components of the clay. TG-DSC shows that the mineral contains 15.55% moisture. IR transmittance spectrum shows the common vibration bands present in the sample which include O–H stretching of inter-porous water, symmetric and asymmetric stretching of hydroxyl functional groups, asymmetrical stretching of internal tetrahedra (O–Si–O and O–Al–O), symmetrical stretching of external linkages, and so on. The measured CEC were found to be 91.37 and 43.01 meq/100 g according to the ammonium acetate method and barium acetate method, respectively.","PeriodicalId":12269,"journal":{"name":"Experimental Results","volume":"13 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2021-08-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"83909560","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 3
On the correction of temperatures derived from meteor wind radars due to geomagnetic activity 地磁活动对流星风雷达温度的校正
Experimental Results Pub Date : 2021-08-12 DOI: 10.1017/exp.2021.11
C. M. Hall, M. G. Johnsen
{"title":"On the correction of temperatures derived from meteor wind radars due to geomagnetic activity","authors":"C. M. Hall, M. G. Johnsen","doi":"10.1017/exp.2021.11","DOIUrl":"https://doi.org/10.1017/exp.2021.11","url":null,"abstract":"Abstract Radars used to observe meteor trails in the mesosphere deliver information on winds and temperature. Use of these radars is becoming a standard method for determining mesospheric dynamics and temperatures worldwide due to relatively low costs and ease of deployment. However, recent studies have revealed that temperatures may be overestimated in conditions such as high geomagnetic activity. The effect is thought to be most prevalent at high latitude, although this is not yet proven. Here, we demonstrate how temperatures might be corrected for geomagnetic effects; the demonstration is for a particular geographic location (Svalbard, 78°N, 16°E) because it is local geomagnetic disturbances that affects local temperature measurements, therefore requiring co-located instruments. We see that summer temperatures require a correction (reduction) of a few Kelvin, but winter estimates are more accurate.","PeriodicalId":12269,"journal":{"name":"Experimental Results","volume":"41 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2021-08-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"77917891","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Cloacal temperature responses of broiler chickens administered with fisetin and probiotic (Saccharomyces cerevisiae) and exposed to heat stress 饲喂非瑟酮和益生菌(酿酒酵母菌)并暴露于热应激的肉鸡肠道温度反应
Experimental Results Pub Date : 2021-08-02 DOI: 10.1017/exp.2021.15
V. O. Sumanu, T. Aluwong, J. Ayo, N. E. Ogbuagu
{"title":"Cloacal temperature responses of broiler chickens administered with fisetin and probiotic (Saccharomyces cerevisiae) and exposed to heat stress","authors":"V. O. Sumanu, T. Aluwong, J. Ayo, N. E. Ogbuagu","doi":"10.1017/exp.2021.15","DOIUrl":"https://doi.org/10.1017/exp.2021.15","url":null,"abstract":"Abstract There is dearth information on the role of fisetin as an antistress agent in ameliorating heat stress in broiler chickens. Here, we experimentally compared probiotic, an antioxidant and antistress agent, with fisetin, an antioxidant agent with little or no report on its antistress effect. Sixty-day-old broiler chickens (Arbo Acre breed) were allotted into 4 groups of 15 birds each as follows; control, fisetin, probiotic, and fisetin + probiotic groups, respectively. All administrations were performed orally through gavage for the treatment groups. The environmental and cloacal temperature (CT) parameters were measured bi-hourly at Days 21, 28, and 35 from 7:00 to 7:00 hr, during the period of study. The environmental parameters exceeded the thermoneutral zone for broiler chickens. The probiotic-supplemented group had the least overall mean CT values all through the experimental period. Based on our findings, fisetin was not a potent antistress agent in mitigating heat stress in birds.","PeriodicalId":12269,"journal":{"name":"Experimental Results","volume":"42 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2021-08-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"75796677","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 5
Dietary ascorbic acid and betaine improve stress responses, testosterone levels and some sexual traits in male Japanese quails during the dry season 在旱季，饲粮中添加抗坏血酸和甜菜碱可改善雄性日本鹌鹑的应激反应、睾酮水平和某些性特征
Experimental Results Pub Date : 2021-07-26 DOI: 10.1017/exp.2021.10
I. C. Egbuniwe, C. Uchendu, I. Obidike
{"title":"Dietary ascorbic acid and betaine improve stress responses, testosterone levels and some sexual traits in male Japanese quails during the dry season","authors":"I. C. Egbuniwe, C. Uchendu, I. Obidike","doi":"10.1017/exp.2021.10","DOIUrl":"https://doi.org/10.1017/exp.2021.10","url":null,"abstract":"Abstract The experiment investigated the effects of dietary ascorbic acid and betaine stress responses, serum testosterone levels, and some sexual traits in male Japanese quails during the dry season. A total of 240 male Japanese quails (14 days old) were used and randomly assigned to four groups, each group has three replicates (n = 20). Birds in treatment groups were fed ascorbic acid (AA); betaine (BET); and AA + BET in their diets, whereas the control birds were fed only basal diet. Environmental conditions were predominantly outside thermoneutral zone for Japanese quails. Dietary AA ± BET increased (p < .05) serum catalase, reduced glutathione and testosterone, but lowered (p < .05) cortisol levels when compared with control group. Supplemental AA, BET, or AA + BET enhanced (p < .05) cloacal gland size and sexual traits. In conclusion, dietary AA and BET improved stress responses, serum testosterone levels, and some sexual traits in male Japanese quails during the dry season.","PeriodicalId":12269,"journal":{"name":"Experimental Results","volume":"38 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2021-07-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"79659913","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 3
Radiation dose to the heart with hypofractionation in patients with left breast cancer 左乳腺癌患者低分割对心脏的辐射剂量
Experimental Results Pub Date : 2021-07-14 DOI: 10.1017/exp.2021.8
B. Yadav, D. Das, Narendra Kumar, M. Singhal, N. Robert
{"title":"Radiation dose to the heart with hypofractionation in patients with left breast cancer","authors":"B. Yadav, D. Das, Narendra Kumar, M. Singhal, N. Robert","doi":"10.1017/exp.2021.8","DOIUrl":"https://doi.org/10.1017/exp.2021.8","url":null,"abstract":"Abstract Introduction In this study we compared radiation dose received by organs at risk (OARs) after breast conservation surgery(BCS) and mastectomy in patients with left breast cancer. Materials and methods Total 30 patients, 15 each of BCS and mastectomy were included in this study. Planning Computerised Tomography (CT) was done for each patient. Chest wall, whole breast, heart, lungs, LAD, proximal and distal LAD, and contra lateral breast was contoured for each patient. Radiotherapy plans were made by standard tangent field. Dose prescribed was 40Gy/16#/3 weeks. Mean heart dose, LAD, proximal and distal LAD, mean and V5 of right lung, and mean, V5, V10 and V20 of left lung, mean dose and V2 of contra lateral breast were calculated for each patient and compared between BCS and mastectomy patients using student’s T test. Results Mean doses to the heart, LAD, proximal LAD and distal LAD were 3.364Gy, 16.06Gy, 2.7Gy, 27.5Gy; and 4.219Gy, 14.653Gy, 4.306Gy, 24.6Gy, respectively for mastectomy and BCS patients. Left lung mean dose, V5, V10 and V20 were 5.96Gy, 16%, 14%, 12.4%; and 7.69Gy, 21%, 18% and 16% in mastectomy and BCS patients, respectively. There was no statistical significant difference in the doses to the heart and left lung between mastectomy and BCS. Mean dose to the right lung was significantly less in mastectomy as compared to BCS, 0.29Gy vs. 0.51Gy, respectively (p = 0.007). Mean dose to the opposite breast was significantly lower in patients with mastectomy than BCS (0.54Gy Vs 0.37Gy, p = 0.007). The dose to the distal LAD was significantly higher than proximal LAD both in BCS (24.6Gy Vs 4.3Gy, p = <0.0001) and mastectomy (27.5Gy Vs 2.7Gy, p = <0.0001) patients. Conclusion There was no difference in doses received by heart and left lung between BCS and mastectomy patients. Mean doses to the right lung and breast were significantly less in mastectomy patients.","PeriodicalId":12269,"journal":{"name":"Experimental Results","volume":"2 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2021-07-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"88901051","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 1
Xanthene-stained nanoparticles for phosphorescence anisotropy measurements 用于磷光各向异性测量的杂蒽染色纳米颗粒
Experimental Results Pub Date : 2021-07-07 DOI: 10.1017/exp.2021.12
Markus J Schmidt, T. Rösgen
{"title":"Xanthene-stained nanoparticles for phosphorescence anisotropy measurements","authors":"Markus J Schmidt, T. Rösgen","doi":"10.1017/exp.2021.12","DOIUrl":"https://doi.org/10.1017/exp.2021.12","url":null,"abstract":"Abstract For the measurement of flow-induced microrotations in flows utilizing the depolarization of phosphorescence anisotropy, suitable luminophores are crucial. The present work examines dyes of the xanthene family, namely Rhodamine B, Eosin Y and Erythrosine B. Both in solution and incorporated in particles, the dyes are examined regarding their luminescent lifetimes and their quantum yield. In an oxygen-rich environment at room temperature, all dyes exhibit lifetimes in the sub-microsecond range and a low intensity signal, making them suitable for sensing fast rotations with sensitive acquisition systems.","PeriodicalId":12269,"journal":{"name":"Experimental Results","volume":"100 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2021-07-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"87005993","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Productive efficiency of traditional multiple cropping systems compared to monocultures of seven crop species: a benchmark study 传统复种制度与7种作物单一栽培的生产效率比较:一项基准研究
Experimental Results Pub Date : 2021-06-04 DOI: 10.1017/exp.2021.7
Debal Deb
{"title":"Productive efficiency of traditional multiple cropping systems compared to monocultures of seven crop species: a benchmark study","authors":"Debal Deb","doi":"10.1017/exp.2021.7","DOIUrl":"https://doi.org/10.1017/exp.2021.7","url":null,"abstract":"","PeriodicalId":12269,"journal":{"name":"Experimental Results","volume":"152 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2021-06-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"81656344","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 2
On the temporal evolution of turbopause altitude, 1996–2021, 70°N, 19°E 湍流顶高度1996-2021年，70°N, 19°E的时间演变
Experimental Results Pub Date : 2021-06-04 DOI: 10.1017/exp.2021.6
C. M. Hall, S. Nozawa
{"title":"On the temporal evolution of turbopause altitude, 1996–2021, 70°N, 19°E","authors":"C. M. Hall, S. Nozawa","doi":"10.1017/exp.2021.6","DOIUrl":"https://doi.org/10.1017/exp.2021.6","url":null,"abstract":"Abstract Medium frequency radars with multiple receivers are able to track the movement of the interference pattern on the ground from echoes from irregularities in refractive index. In particular, refractive index in the mesosphere is determined by electron density – commonly known as the ionospheric D-region. Thus using this technique it is possible to determine winds in the height regime 70-90 km, depending on the degree of ionization throughout the year. In addition, by examining the fading times of the passage of these structures, it is possible to deduce metrics pertaining to neutral air turbulence. Here, we employ a well-established method to this effect. Thereafter, comparing the turbulent intensity to the kinematic viscosity of the neutral atmosphere, we determine the turbopause altitude. Above this height, atmospheric constituents behave independently, whereas below, all components are mixed. Contrary to earlier analyses, we present evidence the turbopause altitude has been constant since approximately 2004.","PeriodicalId":12269,"journal":{"name":"Experimental Results","volume":"47 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2021-06-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"89416763","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
The effect of ultrafiltration transmembrane permeation on the flow field in a surrogate system of an artificial kidney 超滤跨膜渗透对人工肾脏替代系统流场的影响
Experimental Results Pub Date : 2021-03-30 DOI: 10.1017/exp.2021.5
Matilde De Pascale, Mónica Faria, C. Boi, V. Semião, M. N. de Pinho
{"title":"The effect of ultrafiltration transmembrane permeation on the flow field in a surrogate system of an artificial kidney","authors":"Matilde De Pascale, Mónica Faria, C. Boi, V. Semião, M. N. de Pinho","doi":"10.1017/exp.2021.5","DOIUrl":"https://doi.org/10.1017/exp.2021.5","url":null,"abstract":"Abstract Renal Replacement Therapies generally associated to the Artificial Kidney (AK) are membrane-based treatments that assure the separation functions of the failing kidney in extracorporeal blood circulation. Their progress from conventional hemodialysis towards high-flux hemodialysis (HFHD) through the introduction of ultrafiltration membranes characterized by high convective permeation fluxes intensified the need of elucidating the effect of the membrane fluid removal rates on the increase of the potentially blood-traumatizing shear stresses developed adjacently to the membrane. The AK surrogate consisting of two-compartments separated by an ultrafiltration membrane is set to have water circulation in the upper chamber mimicking the blood flow rates and the membrane fluid removal rates typical of HFHD. Pressure drop mirrors the shear stresses quantification and the modification of the velocities profiles. The increase on pressure drop when comparing flows in slits with a permeable membrane and an impermeable wall is ca. 512% and 576% for $ mathrm{CA}22/5%{mathrm{SiO}}_2 $ and $ mathrm{CA}30/5%{mathrm{SiO}}_2 $ membranes, respectively.","PeriodicalId":12269,"journal":{"name":"Experimental Results","volume":"74 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2021-03-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"84986889","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 5
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