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Influence of peptide bond on photosensitized oxidation of tryptophan, tyrosine and histidine dipeptides

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Chinese Science Bulletin 1997年第19期42卷 1624-1628页

作者： Liu, JB zhang, FS zhao, y zhao, FQ Tang, yW Song, XQ TSING HUA UNIV DEPT CHEMBEIJING 100084PEOPLES R CHINA

IN photodynamic therapy, the damage of protein results from the photooxidation of one ormore of only five amino acid residues (tryptophanyl, tyrosyl, histidyl, methionyl and cys-teinyl). These five amino acids are also readily photooxidized in their monomeric states. How-ever, the reaction kinetics and mechanisms of free amino acids and bound amino acid residuesin proteins are somewhat different. For example, Tassin found that the incorporation of tryp-tophan into a peptide linkage dramatically altered its susceptibility to photooxidation as well

关键词： amino acid dipeptide photosensitized oxidation.

Role of adipose tissue grafting and adipose-derived stem cells in peripheral nerve surgery

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Neural Regeneration Research 2022年第10期17卷 2179-2184页

作者： Tiam M.Saffari Sara Saffari Krishna S.Vyas Samir Mardini Alexander y.Shin Department of Orthopedic Surgery Division of Microvascular and Hand SurgeryMayo ClinicRochesterMNUSA Radboud University Medical Center Radboud Institute for Health SciencesDepartment of Plastic SurgeryNijmegenThe Netherlands Department of Surgery Division of Plastic and Reconstructive SurgeryMayo ClinicRochesterMNUSA

The application of autologous fat grafting in reconstructive surgery is commonly used to improve functional *** review aims to provide an overview of the scientific evidence on the biology of adipose tissue,the role of adipose-derived stem cells,and the indications of adipose tissue grafting in peripheral nerve *** tissue is easily accessible through the lower abdomen and inner ***-vascularized adipose tissue grafting does not support oxidative and ischemic stress,resulting in variable survival of adipocytes within the first 24 *** of adipose tissue with a stromal vascular fraction is purported to increase the number of adipose-derived stem cells and is postulated to augment the long-term stability of adipose tissue *** science nerve research suggests an increase in nerve regeneration and nerve revascularization,and a decrease in nerve fibrosis after the addition of adipose-derived stem cells or adipose *** clinical studies,the use of autologous lipofilling is mostly applied to secondary carpal tunnel release revisions with promising *** the use of adipose-derived stem cells in peripheral nerve reconstruction is relatively new,more studies are needed to explore safety and long-term effects on peripheral nerve *** Food and Drug Administration stipulates that adipose-derived stem cell transplantation should be minimally manipulated,enzyme-free,and used in the same surgical procedure,*** tissue grafts that contain native adipose-derived stem cells or stromal vascular *** research may be shifted towards the use of tissue-engineered adipose tissue to create a supportive microenvironment for autologous graft ***-ready alternatives could be enhanced with adipose-derived stem cells or growth factors and eliminate the need for adipose tissue harvest.

关键词： adipose tissue adipose-derived stem cells angiogenesis autologous fat grafting nerve injury nerve regeneration paracrine environment peripheral nerve reconstruction stem cell secretome tissue engineering

PHASE II EVALUATION OF AT-1727 IN ADVANCED HUMAN CANCER

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中华医学杂志(英文版) 1983年第8期96卷 603-603页

作者： z y zhang T F Liu X F zhang Department of Oncologic Radiation Cancer Hospital Shanghai First Medical College Shanghai

During a period of 2 years, 132 patients with advanced solid cancer were treated with AT-1727 alone in 8 hospitals. The objective drug response was not very marked, only 11.4%(15/132). But if the results are evaluated by the international criteria or by old Chinese criteria of new chemotherapeutic drugs, the response rate is raised to 32.6%(43/132). The therapeutic results of AT-1727 in gastric cancer and external vulva cancer are encouraging. Five of 15 cases of non-Hodgkin’s lymphoma had partial remission as did two of 7 cases of Hodgkin’s disease. The most important advantage is, AT-1727 has no myelosuppressive toxic effects, occasionally a few patients had very mild leucopenia but never below 3,000/mm3. Mild gastrointestinal tract disorders were noted but in only 1 case did serious vomiting lead to cessation of treatment.

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Synthesis gas production on glass cloth catalysts modified by Ni and Co oxides

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Journal of Energy Chemistry 2013年第5期22卷 811-818页

作者： G.B.Aldashukurova A.V.Mironenko z.A.Mansurov N.V.Shikina S.A.yashnik V.V.Kuznetsov z.R.Ismagilov Institute for Problems in Combustion Boreskov Institute of Catalysis of SB RAS Institute of Coal Chemistry and Material Science of SB RAS

The catalytic activity of nanostructured low percent (1%) Co-Ni catalysts on the basis of glass fiber (GF) prepared by a"solution combustion" (SC) method was *** catalytic activity of the prepared samples was studied in the reaction of dry reforming of methane (DRM) with *** obtained samples were characterized by a number of physico-chemical methods,including XRD,SEM,TEM,TGA and *** active component was shown to be dispersed in the near-surface layer of the support as nanoparticles of 10—20 nm in *** active component showed a Co3O4 or(Co,Ni)Co2O4 spinel structure,depending on the catalyst *** spinel structure of the active component interacted strongly with the carrier,providing resistance to carbonization,high catalytic activity toward DRM,and high activity and stability in oxidation reactions.

关键词： dry reforming of methane Co-Ni-catalyst glass fiber catalyst self-propagating high temperature synthesis

MORPHOLOGIC STUDy OF CARDIAC MyXOMAS

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中华医学杂志(英文版) 1983年第1期96卷 12-12页

作者： L F Song z Q zhang W y Huang Department of Pathology Cardiovascular Institute Chinese Academy of Medical Sciences Beijing

The morphology of 48 cardiac myxomas obtained from 45 cases is studied by light and electron microscopy. Among them 41 are located in the left atria, 5 in the right atria and 1 each in the left ventricle and right ventricle. Except for 1 case having 3 myxomas and another with recurrent myxoma after excision of the first, patients had only 1 tumor. Myxomal cells are either scattered or in cord-like arrangement. Glands are seen in 3 myxomas. In 41 myxomas, many vessels are surrounded by myxomal cells. The glands and perivascular myxomal cells are directly connected to or in transit to the cord-like myxomal cells. Myxoma pedicles are separated from the heart wall by a layer of elastic fibers. The pulmonary emboli of myxomatous tissue arising from a well differentiated myxoma show evidence of local implantation.

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Determination of the Postmortem Interval Using Fiber Bragg Grating Sensors

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Fluid Dynamics & Materials Processing 2023年第3期19卷 831-844页

作者： M.Adjailia H.Derbal Habak y.Hamaizi H.Triki Radiation Physics Laboratory Department of PhysicsFaculty of SciencesBadji Mokhtar UniversityAnnabaAlgeria Univesity of Picardie Jules Verne LTI LaboratoryAimensFrance

Fiber Bragg grating(FBG)sensors are often used in monitoring activities and to ensure that environmental parameters satisfy industrial *** offer crucial safety measures in the early detection of hazards due to their greatly reduced size,low weight,flexibility,and immunity to electromagnetic *** characteristics make FBGs suitable also for use in relation to the human body for in vivo measurements and long-term *** this study,recent developments are presented with regard to the utilization of these sensors to measure the so-called post-mortem interval(PMI).Such developments rely on numerical simulations based on the Matlab software and monitoring of the rectal temperature,which is one of the main parameters for estimating the ***,the Matlab software is used to solve the Henssge equation for different ambient temperatures and for different body masses;then a Bragg grating sensors is used for post-mortem *** results and their accuracy are discussed.

关键词： Fiber bragg grating temperature sensors Henssge’s nomogram post-mortem interval biomedicine

Bidirectional Erbium Doped Fiber Amplifiers

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High Technology Letters 1995年第1期1卷 66-70页

作者： zhong, C. Peixuan, J. Ling, L. Peida, y. Beijing Univ of Posts and Telecommunications Beijing China

Bidirectional EDFAs(Bi-EDFAs)featuring bidirectional signal input are *** and noise performances of Bi-EDFAs are analysed numerically and comparedwith that of other optical *** of Bi-EDFAs in fiber networks and otherf... 详细信息

关键词： Erbium doped fiber amplifiers ASE Bidirectional optical amplifiers

Influence of precursor solution concentration on the structural, optical and humidity sensing properties of spray-deposited TiO_2 thin films

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Journal of Semiconductors 2018年第12期39卷 13-18页

作者： Dipak L Gapale Sandeep A Arote Balasaheb M Palve Ratan y Borse S.N. Arts D.J.M. Commerce and B.N.S. Science College Sangamner Thin and Thick Film Laboratory Dept.of Electronics M.S.G. College Malegaon Camp (Pin 423105)

In the present paper,the influence of precursor concentration on the structural,optical,and humidity sensing properties of spray-deposited titanium dioxide(TiO) films are investigated. The TiOthin films were successfully deposited by spraying different precursor concentrations such as 0.075 M, 0.1 M, and 0.125 M of titanium trichloride solution onto glass substrates. X-ray diffractometry(XRD) studies confirmed the polycrystalline anatase phase of TiOwith dominant(101) plane. The crystallite size was found to increase with the increase in precursor concentration. The micro-strain and dislocation density in the film was observed to decrease as the crystallite size increased. The UV-vis spectra confirmed the optical absorbance edge of the samples shifted toward lower wavelengths with increased precursor concentration. The humidity sensing properties of the synthesized material were measured by monitoring the change in resistance of the sample with the change in relative *** material synthesized with 0.1 M precursor concentration, by using the spray pyrolysis method,shows good sensitivity and has a response time of 77.5 s and fast recovery time of 3 s.

关键词： titanium dioxide spray pyrolysis structural electrical gas sensing

Advancements in non-starch polysaccharides research for frozen foods and microencapsulation of probiotics

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Frontiers of Chemical Science and Engineering 2009年第4期3卷 413-426页

作者： Pavan Kumar SOMA Patrick D.WILLIAMS y.Martin LO Department of Nutrition and Food Science University of MarylandCollege ParkMD 20742USA

Conventionally used in the food industry as stabilizing,thickening,gelling,and suspending or dispersing agents,non-starch polysaccharides such as xanthan gum are known to improve the texture of certain frozen *** polysaccharide that has received significant attention in recent years is chitosan,a natural biopolymer derived from *** the wake of growing interest in finding ideal encapsulating agents for probiotics,non-starch polysaccharides have been *** research can be found on the effect of each individual polysaccharide,but there remains a void in the literature in terms of closely comparing the characteristics of nonstarch polysaccharides for these applications,especially when more than one biopolymer is employed.A good understanding of the tools capable of elucidating the underlying mechanisms involved is essential in ushering further development of their ***,it is this review’s intention to focus on the selection criteria of non-starch polysaccharides based on their rheological properties,resistance to harsh conditions,and ability to improve sensory quality.A variety of critical tools is also carefully examined with respect to the attainable information crucial to frozen food and microencapsulation applications.

关键词： microencapsulation xanthan galactomannan chitosan curdlan