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Lake-margin ecosystems of saline lakes of the Borzya group(Zabaikalsky Krai, Russia) during the initial filling phase

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Chinese Journal of Oceanology and Limnology 2014年第4期32卷 871-878页

作者： Evgenia P.GORLACHEVA gazhit ts.tsybekmitova Alexey V.AFONIN Natalya A.TASHLIKOVA Ekaterina Yu.AFONINA Alexey P.KUKLIN Natalia V.SALTANOVA Institute of Natural Resources Ecology and Cryology Siberian Branch of Russian Academy of Sciences16 a Nedorezov St Chita 672014Russia

This article presents the results of hydrochemical and hydrobiological studies of shallow saline lakes of the Borzya group(Zabaikalsky Krai, Russia) at the initial filling phase. The lake-margin ecosystems of the studied lakes are characterized by varying degrees of salinity from polyhaline to brine water. Cyclical variations of meteorological conditions and high salinity determined that the compositions of the aquatic organisms are specific, mostly between stenohaline and euryhaline species, the quantities are low, and the community structures are simple.

关键词： saline lakes hydrochemistry weeds zooplankton zoobenthos

The Ecosystem Condition of Basin of the Trans Border River Argun in Zabaikalsky Krai, Russia

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Journal of Resources and Ecology 2015年第2期6卷 119-122页

作者： gazhit ts. tsybekmitova 俄罗斯科学院西伯利亚分院自然资源生态与冰冻学研究所

Cyclic climatic changes, as well as the press of anthropogenic impact, affect ecosystems of the river Argun basin. Specialization of basin management is industrial and agricultural. The main impact is connected with the development of mining companies （including the mining of ore and placer gold）, energy facilities, and the formation of reservoirs in the basin of rivers： the Argun -- the Hailar. As a result of natural and anthropogenic pressure, the limiting factor for ecosystem exploitation in this basin is water resources （water deficiency and its quality）.

关键词： river basin legal and regulatory framework transformation of the ecosystems climate anthropogeniccontributions hydrochemistry biodiversity

A Mild and Practical Procedure for Tetrahydropyranylation of Alcohols and Phenols Catalysed by Anhydrous Ferrous Sulfate

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Chinese Chemical Letters 1998年第3期9卷 241-244页

作者： Li, ts Zhang, ZH Jin, ts Li, YL Hebei Univ Dept Chem Baoding 071002 Hebei Peoples R China Lanzhou Univ Natl Lab Appl Organ Chem Lanzhou 730000 Peoples R China

An easy preparation of tetrahydropyranyl (THP) ethers of alcohols and phenols with 3,4-dihydro-2H-pyran (DHP) in refluxing dichloromethane has been carried out in good to excellent yields under catalysis of anhydrous ... 详细信息

关键词： preparation tetrahydropyranyl ethers protection of hydroxy catalysis anhydrous ferrous sulfate

Studies on Retro-Michael Reaction of 1,5-Dicarbonyl Compounds

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Chinese Chemical Letters 1997年第9期8卷 765-768页

作者： Wang, JX Li, ts HEBEI UNIV DEPT CHEMBAODINGHEBEI PROVINCEPEOPLES R CHINA

The investigation of the scope and limitation of retro-Micheal reaction of 1,5-dicarbonyl compounds showed that the reaction worked well for 1,5-diketones and 1,5-ketoaldehydes but gave poor yield for 1,5-ketoesters a... 详细信息

关键词： MHz Studies on Retro-Michael Reaction of 1,5-Dicarbonyl Compounds

The　Stereochemistry　of　the　Migrating　Groups　in　the　Pyrolysis　of　Stable　Steroidal　Ozonides

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Chinese Chemical Letters 1996年第11期7卷 997-998页

作者： Yang, J Li, ts Li, YL LANZHOU UNIV STATE KEY LAB APPL ORGAN CHEMLANZHOU 730000PEOPLES R CHINA LANZHOU UNIV INST ORGAN CHEMLANZHOU 730000PEOPLES R CHINA HEBEI UNIV DEPT CHEMBAODING 071002PEOPLES R CHINA

Diacholest-13(17)-ene ozonide(1a andlb) and 4, 4-dimethyldiacholest-13 (17)-eneozonides(2a and 2b) underwent pyrolysis to afford the coressponding 17-oxo-13,14;13,17- dis14-lactones (3a and 3b)and 4.4-dimethyl-17-oxo-13,14; 13,17-disecodiacholestano-13,14-lactones(4 and 4b), respectively. The stereochemi-stry of the migratingpoups was Proven to be conserved by comparison with the Baeyer-Villiger oxidation of the corresponding 13,17-secodiacholesta-13,17-diones (5) and 4,4-dimethyl-13, 17-secodiacholesta13, 17-diones(6).

关键词： Stereochemistry the Groups

An interpolation characterization of domains of holomorphy

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Chinese Science Bulletin 1997年第23期42卷 1954-1956页

作者： Liu, ts Liu, CW Zhang, WJ Univ Sci & Technol China Dept Math Hefei 230026 Peoples R China

1 Main resultA connected open set Ω Cn is called a domain of holomorphy, if there do not exist nonemptyopen sets Ω1, Ω2 with Ω2 connected, Ω1 Ω2∩Ω, Ω2 Ω, so that for every u that is holo-morphic on Ω there is a u2 holomorphic on Ω2 with u=u2 on Ω1. This definition is compli-cated. Generally speaking, a domain of holomorphy is a domain of definition of holomorphicfunctions in the sense that there exists a holomorphic function on Ω that cannot be holomor-phically continued to any slightly large open set. Domains of holomorphy play a very importantrole in the theory of several complex variables. There are many different characterizations fordomains of holomorphy--geometrical, analytical or algebraical, each takes its different effi-cient functions in treating various concrete problems of several complex variables （see ref.[1], for example）. In this note, we use the skills of sheaf theory to give a characterization ofdomains of holomorphy by mealls of some interpolation property.

关键词： domains of holomorphy interpolation coherent analytic sheaf cohomology.

Mutational effect of the “-35” element of sorghum psbA gene promoter

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Chinese Science Bulletin 1999年第16期44卷 1474-1480页

作者： Wu, NH Fan, ts Ren, DL Chinese Acad Sci Inst Dev Biol Beijing 100080 Peoples R China

Mutations of the first position T and the third position G in TTGACA, the ' - 35' element of sorghum psbA gene promoter, were induced using chemically synthesized 20 nt oligonucleotide primer. Three mutants were produced: ATTACA, GTGACA, and ATGACA. Then the protein binding affinity of the mutants and the wild type sorghum psbA gene promoter was tested in a spinach chloroplast protein extract system. Gel retardation assay of the

关键词： sorghum ( Sorghum valgare P.) psbA gene 5’-noncodlng region site-specific mutagenesis expression control.

Morphology and biology of Cyclops scutifer Sars, 1863 in high mountain lakes of East Siberia (including Lake Amut)

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Chinese Journal of Oceanology and Limnology 2017年第2期35卷 258-264页

作者： Natalya G. SHEVELEVA Mydygma ts. ITIGILOVA Ayushcuren CHANANBAATOR Institute of Limnology Siberian Branch of Russian Academy Science Ulan-Batorskaya 3 lrkutsk 664033 Russian Federation Institute of Natural Resources Ecology and Cryology Siberian Branch of Russian Academy Science Nedorezova 16a Chita 672014 Russian Federation Institute of Biology Mongolian Academy of Science Pr. Zhukova Ulan-Bator 210351 Mongolia

Data on zooplankton from 13 high-mountain lakes of East Siberia have shown that the Holarctic copepod Cyclops scutifer Sars,1863 dominates among *** July,its abundance comprised 64%-98%of the total plankton fauna in the pelagial of these lakes,approximately 30%in the littoral zone and10%in small northern thermokarst *** measurements and morphological descriptions based on scanning microscope images are supplemented by the data on its geographic distribution and phenology.

关键词： high mountain lakes Cyclops scutifer morphology biology distribution

Nasopharyngeal carcinoma treatment paradigm after HK0501–a potential way forward

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Cancer Communications 2022年第9期42卷 801-803页

作者： Sharon S Poh Joseph ts Wee Department of Radiation Oncology National Cancer Centre SingaporeSingapore 169610Singapore Oncology Academic Clinical Program Duke-NUS Medical SchoolSingapore 169857Singapore

The Hong Kong Nasopharyngeal Carcinoma(NPC)Study Group 0501 trial(HK0501)is the first trial that directly compares induction(IC)versus adjuvant chemotherapy(AC)both given together with concurrent chemoradiation(CCRT)treatment,which long has been a contentious issue[1].Its most salient finding is that when adjusted for platinum doses and other significant factors,the timing of the chemotherapy sequence is not *** the era where chemotherapy is administered at maximum tolerated doses(MTD),the induction strategy has the advantage because of better *** the other hand,with the realization that there may be more ways to skin a cat,adjuvant metronomic chemotherapy has gained traction at the 2021 American Society of Clinical Oncology(ASCO)meeting[2]and provides an alternative to the decades’old dogma of *** chemotherapy works by exerting an anti-angiogenic effect[3-6]and also has immune effects like removing regulatory T cells(Tregs)[7]and myeloid-derived suppressor cells(MDSCs)from the tumour microenvironment[8]and causing dendritic cell maturation,which upregulates and primes the anti-tumor T cell immune response[9,10].Pediatricians are probably the first to successfully incorporate 2 years of maintenance metronomic chemotherapy in their childhood acute lymphoblastic leukaemia protocols[11]which now boast cure rates of over 90%[12].

关键词： doses Nasopharyngeal Carcinoma