检索结果-南通市图书馆

Off-flavor compounds from decaying cyanobacterial blooms of Lake Taihu

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Journal of Environmental Sciences 2013年第3期25卷 495-501页

作者： Zhimei Ma yuan niu Ping Xie Jun Chen Min Tao Xuwei Deng Freshwater Ecology and Biotechnology of China Institute of HydrobiologyChinese Academy of Sciences

The effect of cyanobacterial bloom decay on water quality and the complete degradation of cyanobacterial blooms in a short period were examined by an enclosure experiment in Gonghu Bay of Lake Taihu,*** quality parameters as well as taste and odor compounds during the breakdown of cyanobacterial blooms were *** showed that the decay of cyanobacterial blooms caused anoxic water conditions,decreased pH,and increased nutrient loading to the lake *** highest concentrations of dimethyl sulfide （DMS）,dimethyl trisulfide （DMTS）,and β-cyclocitral were observed in the anoxic water,at 62331.8,12413.3,and 1374.9 ng/L,respectively.2-Methylisoborneol was dominant during the live growth phase of cyanobacterial blooms,whereas DMS and DMTS were dominant during the decomposition *** oxygen,pH,and chlorophyll a were negatively correlated with DMS,DMTS,and β-cyclocitral,whereas total phosphorus,total nitrogen,and ammonium （NH4＋-N） were positively correlated with DMS,DMTS,β-cyclocitral,and β-*** experimental results suggested that preventing the anaerobic decomposition of cyanobacterial blooms is an important strategy against the recurrence of a malodor crisis in Lake Taihu.

关键词： cyanobacterial blooms decay taste and odor compounds Lake Taihu water crisis

Mechanical property and deformation mechanism of gold nanowire with non-uniform distribution of twinned boundaries:A molecular dynamics simulation study

在线全文

学校读者我要写书评

暂无评论

Chinese Physics B 2021年第5期30卷 520-525页

作者： Qi-Xin Xiao Zhao-Yang Hou Chang Li yuan niu School of Science Chang'an UniversityXi'an 710064China

The mechanical property and deformation mechanism of twinned gold nanowire with non-uniform distribution of twinned boundaries(TBs)are studied by the molecular dynamics(MD)*** is found that the twin boundary spacing(TBS)has a great effect on the strength and plasticity of the nanowires with uniform distribution of *** the strength enhances with the decrease of TBS,while its plasticity *** the nanowires with non-uniform distribution of TBs,the differences in distribution among different TBSs have little effect on the Young's modulus or strength,and the compromise in strength *** the differences have a remarkable effect on the plasticity of twinned gold *** twinned gold nanowire with higher local symmetry ratio has better *** initial dislocations always form in the largest TBS and the fracture always appears at or near the twin boundaries adjacent to the smallest *** simulation results are consistent with the experimental results.

关键词： twin nanowire gold non-uniform distribution mechanical property molecular dynamics simulation

Novel invagination procedure for pancreaticojejunostomy using double purse string sutures:A technical note

在线全文

学校读者我要写书评

暂无评论

World Journal of Gastrointestinal Surgery 2023年第12期15卷 2792-2798页

作者： Jun Li He-yuan niu Xing-Kai Meng Department of Hepatobiliary Pancreatic and Splenic SurgeryThe Affiliated Hospital of Inner Mongolia Medical UniversityHohhot 010010Inner Mongolia Autonomous RegionChina

BACKGROUND Postoperative pancreatic fistula(POPF)is one of the most serious complications after pancreaticoduodenectomy(PD),and the choice of pancreaticojejunostomy(PJ)is considered a key factor affecting the occurrence of *** anastomotic methods and their modifications have been proposed,and there is no method that can completely avoid the occurrence of *** on our team’s experience in pancreatic surgery and a review of relevant literature,we describe a novel invagination procedure for PJ using double purse string sutures,which has resulted in favourable *** To describe the precise procedural steps,technical details and clinical efficacy of the novel invagination procedure for *** This study adopted a single-arm retrospective cohort study methodology,involving a total of 65 consecutive patients who underwent PD with the novel invagination procedure for PJ,including the placement of a pancreatic stent,closure of the residual pancreatic end,and two layers of purse-string *** data included age,sex,body mass index(BMI),pancreatic texture,pancreatic duct diameter,operation time,and blood *** outcomes included the operation time,blood loss,and incidence of POPF,postoperative haemorrhage,delayed gastric emptying,postoperative pulmonary infection,postoperative abdominal infection,and postoperative pulmonary *** The mean age of the patients was 59.12(±8.08)*** males and 25 females were included,and the mean BMI was 21.61 kg/m^(2)(±2.74).A total of 41.53% of patients had a pancreatic duct diameter of 3 mm or *** mean operation time was 263.83 min(±59.46),and the mean blood loss volume was 318.4 mL(±163.50).Following the surgical intervention,only three patients showed grade B POPF(4.62%),while no patients showed grade C *** patients(5/65,7.69%)were diagnosed with postoperative *** patients(6/65,9.23%)experienced delayed gastric *** patients(4/65,6.15%)developed post

关键词： Pancreatic anastomosis Pancreatojejunostomy Pancreatic fistula

One-pot/three-step synthesis of zinc-blende CdSe/CdS core/shell nanocrystals with thick shells

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Nano Research 2017年第4期10卷 1149-1162页

作者： yuan niu Chaodan Pu Runchen Lai Renyang Meng Wanzhen Lin Haiyan Qin Xiaogang Peng Center for Chemistry of Novel and High-Performance Materials and Department of Chemistry Zhejiang University Hangzhou 310027 China

A one-pot/three-step synthetic scheme was developed for phase-pure epitaxy of CdS shells on zinc-blende CdSe nanocrystals to yield shells with up to sixteen monolayers. The key parameters for the epitaxy were identified, including the core nanocrystal concentration, solvent type/composition, quality of the core nanocrystals, epitaxial growth temperature, type/concentration of ligands, and composition of the precursors. Most of these key parameters were not influential when the synthetic goal was thin-shell CdSe/CdS core/shell nanocrystals. The finalized synthetic scheme was reproducible at an almost quantitative level in terms of the crystal structure, shell thickness, and optical properties.

关键词： zinc-blende core/shell quantum dots thick shells

Highly reactive, flexible yet green Se precursor for metal selenide nanocrystals： Se-octadecene suspension （Se-SUS）

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Nano Research 2013年第9期6卷 652-670页

作者： Chaodan Pu Jianhai Zhou Runchen Lai yuan niu Wennuan Nan Xiaogang Peng Center for Chemistry of Novel & High-Performance Materials and Department of Chemistry Zhejiang University Hangzhou 310027 China

A suspension of fine selenium （Se） powder （100 or 200 mesh） in octadecene （Se-SUS） has proven to be a high-performance, versatile, convenient, reproducible, yet green Se precursor. The advantages of Se-SUS arise from its highly reactive chemical nature and flexibility. These two features made it possible to carry out the synthesis of high quality metal selenide nanocrystals with diverse compositions and structures, including binary, core/shelL transition metal doped, and complex composition nanocrystals. These successes further demonstrated that Se-SUS is a powerful Se precursor for solving a few long- standing challenges in the synthesis of high quality selenide nanocrystals. For instance, Se-SUS was successfully employed as a Se precursor for shell growth in high quality core/shell nanocrystals to replace expensive and highly toxic precursors, such as Se-phosphine and bis-trimethylsilyl selenide, with greatly lowered epitaxial temperatures （as low as 150℃） to avoid alloying. As another example, Se-SUS enabled ＂co-nucleation doping＂ as a means of preparing high quality Mn doped ZnSe nanocrystals with pure, stable, and highly efficient dopant fluorescence.

关键词： selenium precursor selenium suspension metal selenide nanocrystals

What is the next generation therapeutic strategy for castration-resistant prostate cancer

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Asian Journal of Andrology 2015年第2期17卷 223-224页

作者： Si-Meng Wen Chang-Yi Quan Ning Jiang Zhi-Qun Shang yuan-Jie niu Department of Urology Second Hospital of Tianjin Medical University Tianjin China qanjin Institute of Urology Tianjin Medical University Tianjin China.

Prostate cancer （PCa） is one of the most common cancers in the world. Since androgen receptor （AR） signal plays key roles in the PCa progression, targeting androgens via the current androgen deprivation therapy （ADT） is the main therapeutic strategy for advanced PCa. However, most patients who receive ADT, including the second generation anti-androgens enzalutamide （also known as MDV3100） may finally develop the castration （or anti-androgen） resistance after 12-24 months treatment. In the manuscript by Asangani et aL, the authors demonstrated that targeting the amino-terminal bromodomains of BRD4 could preferentially suppress human castration-resistant prostate cancer （CRPC） cell lines. While further studies are required to understand the full impact of their findings, the innovative approach provides a potential novel epigenetic approach for the concerted blockade of oncogenic drivers in CRPC.

关键词： @@

Clinicopathological characteristics and typing of multilocular cystic renal neoplasm of low malignant potential

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

World Journal of Clinical Cases 2024年第14期12卷 2332-2341页

作者： Wen-Long Gao Gang Li Dong-Sheng Zhu yuan-Jie niu Department of Urology The Second Hospital of Tianjin Medical UniversityTianjin 300211China Department of Pediatric Surgery The First People’s Hospital of LianyungangLianyungang 222000Jiangsu ProvinceChina

BACKGROUND Up until now,no research has been reported on the association between the cli-nical growth rate of multilocular cystic renal neoplasm of low malignant potential(MCRNLMP)and computed tomography(CT)imaging *** study sought to examine the correlation between them,with the objective of distin-guishing unique features of MCRNLMP from renal cysts and exploring effective management *** To investigate optimal management strategies of *** We retrospectively collected and analyzed data from 1520 patients,comprising 1444 with renal cysts and 76 with MCRNLMP,who underwent renal cyst decom-pression,radical nephrectomy,or nephron-sparing surgery for renal cystic disease between January 2013 and December 2021 at our *** of MC-RNLMP utilized the Bosniak classification for imaging and the 2016 World Health Organization criteria for clinical *** Our meticulous exploration has revealed compelling findings on the occurrence of ***,it comprises 1.48%of all cases involving simple renal cysts,5.26%of those with complex renal cysts,and a noteworthy 12.11%of renal tumors coexisting with renal cysts,indicating a statistically significant difference(P=0.001).Moreover,MCRNLMP constituted a significant 22.37%of the patient po-pulation whose cysts demonstrated a rapid growth rate of≥2.0 cm/year,whereas it only represented 0.66%among those with a growth rate below 2.0 cm/*** the 76 MCRNLMP cases studied,none of the nine patients who underwent subsequent nephron-sparing surgery or radical nephrectomy following renal cyst decompression experienced recurrence or *** the remaining 67 patients,who were actively monitored over a 3-year postoperative period,only one showed suspicious recurrence on CT *** MCRNLMP can be tentatively identified and categorized into three types based on CT scanning and growth rate *** treating MCRNLMP,partial nephrectomy is preferred,while rad

关键词： Renal cysts Multilocular cystic renal neoplasm of low malignant potential Computed tomography Diagnosis Treatment

Microcystis aeruginosa/Pseudomonas pseudoalcaligenes interaction effects on off-flavors in algae/bacteria co-culture system under different temperatures

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Journal of Environmental Sciences 2015年第5期27卷 38-43页

作者： Xi Yang Ping Xie Yunzhen Yu Hong Shen Xuwei Deng Zhimei Ma Peili Wang Min Tao yuan niu Donghu Experimental Station of Lake Ecosystems State Key Laboratory of Freshwater Ecology and Biotechnology of ChinaInstitute of Hydrobiology Chinese Academy of Sciences Wuhan Fisheries Science Research Institute The University of Chinese Academy of Sciences

We conducted an experiment to study the interaction effects of Microcystis aeruginosa and Pseudomonas pseudoalcaligenes on off-flavors in an algae/bacteria co-culture system at three temperatures（24, 28 and 32℃）. Gas chromatography-mass spectrometry was applied to measure off-flavor compounds dimethyl sulfide（DMS）, dimethyl trisulfide（DMTS）,2-methylisoborneol, geosmin（GEO） and β-cyclocitral. During the lag phase of co-cultured M. aeruginosa（first 15 days）, P. pseudoalcaligenes significantly increased the production of DMS, DMTS and β-cyclocitral at all three temperatures. In the exponential phase of co-cultured M. aeruginosa（after 15 days）, M. aeruginosa became the main factor on off-flavors in the co-culture system, and β-cyclocitral turned to the highest off-flavor compound. These results also indicated that DMS, DMTS and β-cyclocitral were the main off-flavor compounds in our M. aeruginosa/P. pseudoalcaligenes co-culture system. Univariate analysis was applied to investigate the effects of M. aeruginosa and P. pseudoalcaligenes on the production of off-flavors. The results demonstrated that both M. aeruginosa and P. pseudoalcaligenes could increase the production of DMS and DMTS, while β-cyclocitral was mainly determined by M. aeruginosa. Our results also provide some insights into understanding the relationship between cyanobacteria and heterotrophic bacteria.

关键词： Co-culture system Microcystis aeruginosa Off-flavors Pseudomonas pseudoalcaligenes

Photosynthetic characteristics of cotton are enhaneed by altering the timing of mulch film removal

在线全文

学校读者我要写书评

暂无评论

Journal of Cotton Research 2021年第3期4卷 189-210页

作者： ZHANG Zhanqin ZHANG Li TIAN Haiyan niu yuan YANG Xiangkun Xinjiang Academy of Agricultural and Reclamation Science ShiheziXinjiangChina 832000 Key Laboratory of Xinjiang Production and Construction Corps for Cereal Quality Research and Gen etic Im prove me nt ShiheziXinjia ngChina 832000 不详

Background:The photosynthetic parameters of cotton plants may be modified by the timing of film removal during their growing *** study was undertaken during 2015-2017 in Xinjiang,China,to determine to what extent the film mulching removal time,1 and 10 days before the first irrigation and 1 day before the second irrigation after seedling emergence,influenced cotton's photosynthetic *** control group(CK)was film-mulched throughout the growth ***:The results suggested the following:(1)Removing mulching-film within 50 days since seedling emergence had adverse effects on soil temperature and moisture.(2)Film-removal before the first or second irrigation after emergence improved the net photosynthetic rate in cotton's later flowering stage and its transpiration rate in mid and later flowed ng stages while enhancing the actual electron transport rate(ETR)and maximum electron transfer rate(ETRmax)between cotton photosystems I and II.(3)Film-removal treatment also increased cotton plants'toleranee to high irradiation after emergence,the trend was more pronounced in the early flowering stage in wetter years.(4)Leaf area index(LAI)of cotton was reduced in the film-removal treatment for which the least accumulation of dry matter occurred in a drought year(i.e.,2015).(5)Film removal caused a yield decrease in the dry year(2015),and the earlier the film was removed,the more seriously the yield *** mulching film before the second irrigation could increase the yield of XLZ42 in the rainy year(2016)and the normal rainfall year(2017).Early film removal can in crease the yield of XLZ45 in the rainy year(2016).Conclusions:Collectively,our stud/s experimental results indicate that applying mulch film removal at an appropriate,targeted time after seedling emerge nee had no adverse effects on soil moisture and temperature,and improved the photosy nthetic performance of cotton,thus in creased cotton yield and fiber quality,but no significa

关键词： Chlorophyll fluorescence Gas exchange parameters Lint yield Removing mulch film Soil temperature and moisture content