Acid hydrolysis products of DDD and DDT precursors

1973 ◽  
Vol 38 (4) ◽  
pp. 835-838 ◽  
Author(s):  
Bruce L. Jensen ◽  
Raymond E. Counsell
Keyword(s):  
Acid Hydrolysis ◽  
Hydrolysis Products

scholarly journals HPTLC determination of diosgenin in fenugreek seeds

2018 ◽  
Vol 68 (1) ◽  
pp. 97-107 ◽  
Author(s):  
Barbara Król-Kogus ◽  
Khenifi Mohammed Lamine ◽  
Piotr Migas ◽  
Messaoud Boudjeniba ◽  
Mirosława Krauze-Baranowska
Keyword(s):  
Ethyl Acetate ◽  
Acid Hydrolysis ◽  
Methanolic Extract ◽  
Soxhlet Extraction ◽  
African Origin ◽  
Fenugreek Seeds ◽  
Hydrolysis Products ◽  
Hydrolysis Of

Abstract A new HPTLC-densitometric method for diosgenin determination in fenugreek seeds was established after optimization of the conditions for efficient saponin extraction and acid hydrolysis. Several procedures were tested, the best of which was a three-step Soxhlet extraction, followed by hydrolysis of the obtained methanolic extract with 2 mol L-1 H2SO4. Best diosgenin separation from other hydrolysis products was obtained on HPTLC Si60F254 plates u sing a mixture of n-heptane/ethyl acetate (7:3, V/V) and modified anisaldehyde as a spraying reagent. The method was preliminarily validated and the determined amounts of diosgenin in fenugreek seeds of Polish and African origin were found to be similar and ranged from 0.12-0.18 %.

scholarly journals Teicoplanin, antibiotics from Actinoplanes teichomyceticus nov. sp. VI. Chemical degradation: physico-chemical and biological properties of acid hydrolysis products.

1984 ◽  
Vol 37 (9) ◽  
pp. 988-999 ◽  
Author(s):  
ADRIANO MALABARBA ◽  
PAOLO STRAZZOLINI ◽  
ADELE DEPAOLI ◽  
MAURO LANDI ◽  
MARISA BERTI ◽  
...  
Keyword(s):  
Acid Hydrolysis ◽  
Biological Properties ◽  
Chemical Degradation ◽  
Actinoplanes Teichomyceticus ◽  
Hydrolysis Products ◽  
Physico Chemical

Acid Hydrolysis Products of Sulfomycin I

1977 ◽  
Vol 18 (9) ◽  
pp. 735-736 ◽  
Author(s):  
Hiroshi Abe ◽  
Masaharu Ikeda ◽  
Tetsuo Takaishi ◽  
Yukio Ito ◽  
Tcmoharu Okuda
Keyword(s):  
Acid Hydrolysis ◽  
Hydrolysis Products

scholarly journals Two New Triterpenoid Saponins from the Structural Modification of Pseudoginsenoside-F11 and their Cytotoxic Activities

2016 ◽  
Vol 11 (5) ◽  
pp. 1934578X1601100
Author(s):  
Manman Li ◽  
Zhicai Wang ◽  
Pengfei Zhang ◽  
Yan Xu ◽  
Hongda Ding ◽  
...  
Keyword(s):  
Acid Hydrolysis ◽  
Tumor Cells ◽  
Structural Modification ◽  
Human Tumor ◽  
2D Nmr ◽  
Cytotoxic Activities ◽  
Human Tumor Cells ◽  
Triterpenoid Saponins ◽  
Spectroscopic Analyses ◽  
Hydrolysis Products

Two ginsenoside derivatives (1, 2) along with 2 known ginsenosides (3, 4) were isolated from the acid hydrolysis products of pseudoginsenoside-F11. Their structures were elucidated on the basis of spectroscopic analyses, including 1D, 2D NMR and HR-ESI-MS. Among them, (12 R, 20 S, 24 S)-20, 24; 12, 24-diepoxy-dammarane-3β, 6α-diol (1) and (20 R, 24 R)-dammar-20, 24-epoxy-3β, 6α, 12β, 25-tetraol (2) were identified as new triterpenoid saponins. They were subjected to assay for cytotoxic activities against six human tumor cells lines.

Positive and negative ion mass spectrometry of benzophenones, the acid-hydrolysis products of benzodiazepines

1987 ◽  
Vol 98 (1) ◽  
Author(s):  
O. Suzuki ◽  
H. Hattori ◽  
M. Asano ◽  
T. Takahashi ◽  
H. Brandenberger
Keyword(s):  
Mass Spectrometry ◽  
Acid Hydrolysis ◽  
Negative Ion ◽  
Negative Ion Mass Spectrometry ◽  
Hydrolysis Products ◽  
Ion Mass Spectrometry

On the structure of the hot acid hydrolysis products of 3.ALPHA.,20.ALPHA.-disulpho-oxy-5.ALPHA.-pregnane.

1978 ◽  
Vol 26 (7) ◽  
pp. 2262-2265 ◽  
Author(s):  
RYOKO OHUCHI ◽  
NORIO KAWAHARA ◽  
ITSUO YOSHIZAWA
Keyword(s):  
Acid Hydrolysis ◽  
Hydrolysis Products

Protective effect of phytic acid hydrolysis products on iron-induced lipid peroxidation of liposomal membranes

Lipids ◽  
2000 ◽  
Vol 35 (12) ◽  
pp. 1411-1414 ◽  
Author(s):  
Sayuri Miyamoto ◽  
Goro Kuwata ◽  
Masatake Imai ◽  
Akihiko Nagao ◽  
Junji Terao
Keyword(s):  
Lipid Peroxidation ◽  
Protective Effect ◽  
Acid Hydrolysis ◽  
Phytic Acid ◽  
Hydrolysis Products ◽  
Liposomal Membranes
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