全文获取类型
收费全文 | 49篇 |
免费 | 1篇 |
专业分类
化学 | 39篇 |
数学 | 1篇 |
物理学 | 10篇 |
出版年
2023年 | 2篇 |
2021年 | 1篇 |
2016年 | 4篇 |
2015年 | 1篇 |
2014年 | 1篇 |
2013年 | 1篇 |
2012年 | 1篇 |
2011年 | 1篇 |
2010年 | 1篇 |
2009年 | 4篇 |
2008年 | 5篇 |
2007年 | 2篇 |
2006年 | 4篇 |
2005年 | 1篇 |
2004年 | 3篇 |
2002年 | 1篇 |
2001年 | 1篇 |
1998年 | 3篇 |
1992年 | 1篇 |
1991年 | 1篇 |
1990年 | 1篇 |
1987年 | 1篇 |
1982年 | 1篇 |
1980年 | 1篇 |
1978年 | 2篇 |
1976年 | 1篇 |
1974年 | 2篇 |
1967年 | 2篇 |
排序方式: 共有50条查询结果,搜索用时 0 毫秒
1.
Preparation of ultradispersed transition metals (20–100 nm) by reduction of metal complexes in molecular microreactors (cavities of immobilized calixarenes, polyelectrolytes) was studied.Translated from Zhurnal Prikladnoi Khimii, Vol. 77, No. 11, 2004, pp. 1914–1916.Original Russian Text Copyright © 2004 by Altshuler, Sapozhnikova. 相似文献
2.
A. F. Prokof'eva Zh. Z. Sapozhnikova V. N. Volkova V. V. Negrebetskii L. A. Pokrovskaya N. N. Mel'nikov 《Chemistry of Heterocyclic Compounds》1991,27(7):772-778
A study was carried out of alkylation, acylation and aminomethylation reactions were studied in the 5-alkyl-4,5-dihydro-1,2,4-triazin-4-one series. Alkylation by alkyl halides proceeds in the presence of sodium methylate at the N
(1)
and N
(4)
atoms with the formation of a mixture of alkylated compounds of three types: derivatives of 4,5-dihydrotriazine, unsaturated triazine, and their dimers. Acylation with isocyanates leads to the formation of heterocyclic ureas — derivatives at the N
(4)
atom. Mono- and bisaminals were obtained by the reaction of triazines with ethoxymethyldiethylamine.Translated from Khimiya Geterotsiklicheskikh Soedinenii, No. 7, pp. 963–970, July, 1991. 相似文献
3.
O. G. Al’tshuler L. A. Sapozhnikova G. N. Al’tshuler 《Russian Journal of Applied Chemistry》2006,79(8):1301-1305
New sulfonic cation exchangers based on immobilized calix[4]resorcinolarenes were prepared. Their ion-exchange properties toward Na+, Cu2+, [Pd(NH3)4]2+, In3+, and Sn4+ ions were studied in a wide pH range, and their chemical stability was examined. 相似文献
4.
Viktor A. Ilin Elena V. Pyzhik Anton B. Balakhonov Maksim A. Kiryushin Evgeniya V. Shcherbatova Andrey A. Kuznetsov Pavel A. Kostin Andrey V. Golovin Vladimir A. Korshun Vladimir A. Brylev Kseniya A. Sapozhnikova Alexey M. Kopylov Galina V. Pavlova Igor N. Pronin 《Molecules (Basel, Switzerland)》2023,28(1)
Central nervous system tumors related to gliomas are of neuroectodermal origin and cover about 30% of all primary brain tumors. Glioma is not susceptible to any therapy and surgical attack remains one of the main approaches to its treatment. Preoperative tumor imaging methods, such as positron emission tomography (PET), are currently used to distinguish malignant tissue to increase the accuracy of glioma removal. However, PET is lacking a specific visualization of cells possessing certain molecular markers. Here, we report an application of aptamers to enhancing specificity in imaging tumor cells bearing the epidermal growth factor receptor (EGFR). Glioblastoma is characterized by increased EGFR expression, as well as mutations of this receptor associated with active division, migration, and adhesion of tumor cells. Since 2021, EGFR has been included into the WHO classification of gliomas as a molecular genetic marker. To obtain conjugates of aptamers GR20 and GOL1-specific to EGFR, a 4-[18F]fluorobenzylazide radiotracer was used as a synthon. For the production of the synthon, a method of automatic synthesis on an Eckert & Ziegler research module was adapted and modified using spirocyclic iodonium ylide as a precursor. Conjugation of 4-[18F]fluorobenzylazide and alkyne-modified aptamers was carried out using Cu(I)-catalyzed azide-alkyne cycloaddition (CuAAC) with/without the TBTA ligand. As a result, it was possible to obtain 18F-labelled conjugates with 97% radiochemical purity for [18F]FB-GR20 and 98% for [18F]FB-GOL1. The obtained conjugates can be used for further studies in PET analysis on model animals with grafted glioblastoma. 相似文献
5.
Sapozhnikova Irina M. Ulomsky Evgeny N. Rusinov Vladimir L. Chupakhin Oleg N. Stepanov Alexander V. Savateeva-Lyubimova Tatiana N. Sivak Konstantin V. 《Chemistry of Heterocyclic Compounds》2021,57(4):467-472
Chemistry of Heterocyclic Compounds - A series of azolo[5,1-c][1,2,4]triazines containing a cyano group were prepared as analogs of the drug Triazavirin (riamilovir). Sodium... 相似文献
6.
O. G. Al’tshuler L. P. Abramova L. A. Sapozhnikova G. N. Al’tshuler 《Russian Journal of Applied Chemistry》2009,82(3):391-395
New phosphoric acid cation exchanger was synthesized on the basis of immobilized calix[4] resorcinolarene and its service characteristics were determined. 相似文献
7.
8.
9.
10.
O. G. Al’tshuler L. A. Sapozhnikova G. N. Al’tshuler 《Russian Journal of Applied Chemistry》2008,81(5):850-853
The ion-exchange equilibrium of protons in SO3H groups of a sulfonic cation exchanger based on immobilized cis-tetraphenylcalix[4]resorcinolarene with cations of Li+, Na+, Ag+, Cu2+, In3+, and protonated 1,3,5,7-tetraazaadamantane in aqueous solutions of electrolytes at 293 K was studied. The corrected coefficients of the cation exchange selectivity were calculated. 相似文献