Tag: M.W=300-350

Schmitz-Moormann, Paul published the artcileTissue staining by basic dyes. I. Influence of the pH of the staining solution and of the dye-affinity on the adsorption of the dye, HPLC of Formula: 10510-54-0, the publication is Histochemie (1968), 16(1), 23-35, database is CAplus and MEDLINE.

Diluted heat-coagulated egg-white, citrated defibrinated beef-serum, and minced beef muscle were washed with alc., acetone, and ether, dried at 50¡ã and ground. Dye adsorption on the protein powders and on Sephadex, G-25 fine, was determined by shaking 1 g. dry protein or Sephadex with 20 ml. buffered 10-4M dye for 1 hr., leaving at room temperature overnight, shaking again, and centrifuging. Michaelis buffers, ionic strength 0.1, 0.1 N HCl, and N HCl were used. Methylene blue, toluidine, blue, cresyl fast violet, crystal violet, alcain blue, thioflavine T, and acridine orange were tested. Except for Sephadex, which failed to stain with methylene blue, the 3 protein powders stained minimally at pH 1 and staining increased to a maximum at pH 9. Swelling of proteins was maximal at pH 1, but varied little with pH above pH 2. A chromatog. method was developed in which 10 g. protein or Sephadex was allowed to swell in water overnight, transferred to a chromatographic column, and washed with buffer. Dye (0.01 M) diluted with 1 volume buffer was applied and the column developed with buffer. The fraction (25 ml.) in which the peak dye concentration appeared varied with pH. Plots of the number of the peak fractions against pH gave a measure of the affinity of various dyes. All dyes were retarded with increasing pH. The order of affinity was crystal violet > acridine orange > toluidine blue > methylene blue ¡Ö thioflavine T. With Sephadex there was no dependence on pH and the order of dye affinity was reversed.

Histochemie published new progress about 10510-54-0. 10510-54-0 belongs to catalysis-chemistry, auxiliary class Other Aromatic Heterocyclic,Salt,Amine,Inhibitor,Inhibitor, name is 5,9-Diaminobenzo[a]phenoxazin-7-ium acetate, and the molecular formula is C18H15N3O3, HPLC of Formula: 10510-54-0.

Referemce:
https://courses.lumenlearning.com/boundless-chemistry/chapter/catalysis/,
Catalysis – Wikipedia

Runge, P. K. published the artcileMode-locking of helium-neon lasers with saturable organic dyes, Synthetic Route of 10510-54-0, the publication is Optics Communications (1971), 3(6), 434-6, database is CAplus.

Cresyl Violet, Cresyl Violet Acetate, and Nile Blue A [(0.8-3.3) ¡Á 10-4M in MeOH] acted as saturable absorbers for mode-locking 2 He-Ne lasers (10 and 1.8 m long, resp.) at ¦Ë = 6328 ?. The optical pulse width decreased linearly with increasing pulse energy. The min. pulse width was 220 psec for the 10-m laser (with 2 ¡Á 10-4M Cresyl Violet) at a peak power d. of 2.5 ¡Á 108 W/cm2. The min. power d., at which mode-locking was observed, was 2 ¡Á 105 W/cm2 for the 1.8-m laser. The dye concentration determined the pulse repetition rate of the laser.

Optics Communications published new progress about 10510-54-0. 10510-54-0 belongs to catalysis-chemistry, auxiliary class Other Aromatic Heterocyclic,Salt,Amine,Inhibitor,Inhibitor, name is 5,9-Diaminobenzo[a]phenoxazin-7-ium acetate, and the molecular formula is C18H15N3O3, Synthetic Route of 10510-54-0.

Referemce:
https://courses.lumenlearning.com/boundless-chemistry/chapter/catalysis/,
Catalysis – Wikipedia

Kugel, Roger W. published the artcileMetachromasy: the interactions between dyes and polyelectrolytes in aqueous solution, Quality Control of 10510-54-0, the publication is Advances in Chemistry Series (1993), 507-33, database is CAplus.

The literature on metachromasy (the color change in the dye absorption spectrum that occurs when certain cationic dyes interact with anionic polyelectrolytes) is overviewed and two quant. anal. methods for acrylic acid-acrylamide copolymer based on the metachromatic effect are proposed. The color-array method allows for the visual determination of polymer concentration by observing the color of Toluidine Blue O, Cresyl Violet Acetate, or Safranine O at various P/D (polymer acrylate residue to dye mol.) ratios. An abrupt color change is observed at P/D = 1. The complexation-extraction method is based on the removal of the dye Janus Green B from solution by complexation with acrylic acid-acrylamide copolymer followed by extraction with 1,1,2-trichlorotrifluoroethane (Freon) solvent. Typical concentration ranges for both tests were 0-10 ppm polymer (0-7.4 ¡Á 10^-5 M acrylate residue) and 1-6 ¡Á 10^-5 M dye.

Advances in Chemistry Series published new progress about 10510-54-0. 10510-54-0 belongs to catalysis-chemistry, auxiliary class Other Aromatic Heterocyclic,Salt,Amine,Inhibitor,Inhibitor, name is 5,9-Diaminobenzo[a]phenoxazin-7-ium acetate, and the molecular formula is C18H15N3O3, Quality Control of 10510-54-0.

Referemce:
https://courses.lumenlearning.com/boundless-chemistry/chapter/catalysis/,
Catalysis – Wikipedia

Green, Floyd J. published the artcilePolychromasia of Cresyl Violet dyes; a chemical explanation of variations in pre-World War II products, Category: catalysis-chemistry, the publication is Stain Technology (1966), 41(4), 223-8, database is CAplus and MEDLINE.

Darrow Red (9-acetylamino-5-aminobenzo[¦Á]phenoxazonium chloride) and its 10-Me derivative, precursors of Cresyl Violet acetate (5,9-diaminobenzo[¦Á]phenoxazonium acetate) and 5,9-diamino-10-methylbenzo[¦Á]phenoxazonium acetate (the compound which duplicates visible absorbance spectra of the violet component of prewar German Cresyl Fast Violet and the current foreign product Cresyl Fast Violet), yielded polychrome products when subjected to alk. hydrolyses. The hydrolyses were accomplished by refluxing 17.5 g. of each acetylated compound with 25 g. NaOH in 250 ml. H₂O. At the end of 1.5 hrs., visible spectra revealed, in each case, the presence of 3 components: the starting material, the deacetylated 9-amino compound (a Cresyl Violet) and the 5-oxo derivative Addnl. refluxing for 6.5 hrs. resulted in a product containing only the deacetylated 9-amino compound and the 5-oxo derivative in approx. equivalent amounts The latter mixture was not altered by addnl. refluxing. Absorbance maximum of compounds resulting from the hydrolysis of the 10-Me derivative of Darrow Red were bathochromic by 4-6 m¦Ì to their counterparts obtained from the hydrolysis of Darrow Red. Minor variations in manufacturing processes can readily affect the properties of these biological stains.

Stain Technology published new progress about 10510-54-0. 10510-54-0 belongs to catalysis-chemistry, auxiliary class Other Aromatic Heterocyclic,Salt,Amine,Inhibitor,Inhibitor, name is 5,9-Diaminobenzo[a]phenoxazin-7-ium acetate, and the molecular formula is C18H15N3O3, Category: catalysis-chemistry.

Referemce:
https://courses.lumenlearning.com/boundless-chemistry/chapter/catalysis/,
Catalysis – Wikipedia

Barden, Herbert published the artcileAcid fast staining of oxidized neuromelanin and lipofuscin in the human brain, Application of 5,9-Diaminobenzo[a]phenoxazin-7-ium acetate, the publication is Journal of Neuropathology and Experimental Neurology (1979), 38(5), 453-62, database is CAplus and MEDLINE.

Acid fast staining of the bleached residuum of substantia nigra neuromelanin and of oxidized inferior olive lipofuscin was demonstrated in paraffin and frozen sections stained with the HOAc-carbol fuchsin method of J. Barbeito-Lopez (1946) and the aldehyde fuchsin method of G. Gomori (1950). Acid fast staining occurred when sections were exposed to a prestain oxidation with KMnO₄ in conjunction with a poststain differentiation with dilute HCl. The acid fast staining with HOAc-carbol fuchsin was differentiable and in contrast to the acid fast staining with aldehyde fuchsin which was nondifferentiable. A possible histochem. basis for differentiable and nondifferentiable acid fast staining was discussed. The identity of the bleached residuum of neuromelanin as lipofuscin also was discussed.

Journal of Neuropathology and Experimental Neurology published new progress about 10510-54-0. 10510-54-0 belongs to catalysis-chemistry, auxiliary class Other Aromatic Heterocyclic,Salt,Amine,Inhibitor,Inhibitor, name is 5,9-Diaminobenzo[a]phenoxazin-7-ium acetate, and the molecular formula is C18H15N3O3, Application of 5,9-Diaminobenzo[a]phenoxazin-7-ium acetate.

Referemce:
https://courses.lumenlearning.com/boundless-chemistry/chapter/catalysis/,
Catalysis – Wikipedia

Zhou, Mi published the artcileBreed dependent regulatory mechanisms of beneficial and non-beneficial fatty acid profiles in subcutaneous adipose tissue in cattle with divergent feed efficiency, HPLC of Formula: 6217-54-5, the publication is Scientific Reports (2022), 12(1), 4612, database is CAplus and MEDLINE.

The current study aimed to determine whether breed and feed efficiency affect the mol. mechanisms regulating beneficial and non-beneficial fatty acid profiles in s.c. adipose tissue of beef steers. Fatty acid profiling and RNA-Seq based transcriptome anal. were performed on s.c. adipose tissues collected from beef steers with three divergent breeds (Angus, ANG, n = 47; Charolais, CHAR, n = 48; Kinsella Composite, KC, n = 48) and different residual feed intake (RFI, a measure of feed efficiency). The comparison of fatty acid profiles showed that KC had higher beneficial FAs compared to the other two breeds. Distinct FA profiles between H-RFIfat and L-RFIfat steers was more obvious for KC steers, where H-RFIfat steers tended to have higher proportion of healthy FAs and lower proportion of the unhealthy FAs. A higher number of differentially expressed (DE) genes were observed for KC steers, whereas ANG and CHAR steers had a lower number of DE genes between H- and L-RFIfat steers. The association analyses of the gene expressions and FA profiles showed that 10 FA metabolism-associated genes together with the one upstream regulator (SREBF1) were associated with the proportion of C18:2n-6, total n-6, PUFA and PUFA/SFA for KC steers but not the other two breeds. S.c. adipose tissue FA profiles and healthy FA index differed in cattle with divergent feed efficiency and such variation was unique for the three examined cattle breeds. Key FA metabolism-associated genes together with SREBF1 which is the upstream regulator of a set of genes involved in lipid metabolism may be of importance for genetic selection of meat with higher healthy FA index in beef cattle.

Scientific Reports published new progress about 6217-54-5. 6217-54-5 belongs to catalysis-chemistry, auxiliary class Alkenyl,Carboxylic acid,Aliphatic hydrocarbon chain,Metabolic Enzyme,RAR/RXR,Natural product, name is Docosahexaenoic Acid, and the molecular formula is C10H10CoF6P, HPLC of Formula: 6217-54-5.

Referemce:
https://courses.lumenlearning.com/boundless-chemistry/chapter/catalysis/,
Catalysis – Wikipedia

Abraham, Sharon Achamma Abraham published the artcileStructures of cation doped polyacenes and its binding energies across polyacene surface, COA of Formula: C24H12, the publication is Materials Today: Proceedings (2022), 57(Part_4), 1858-1864, database is CAplus.

The Binding energies of cation-¦Ð complexes are calculated computationally using DFT method and the B3LYP functional. The binding energies in kcal/mol using B3LYP functional and 6-31 + G(d,p) basis set in Gaussian09 has provided a source to design one-dimensional materials and to study hopping of charges in one-dimensional materials. The Mulliken charges and ¦¤E in kcal/mol with bsse corrections are confirmed using B3LYP functional and 6-31 + G(d,p) basis set in Gaussian09. Above benzene ring, a cation is located at a distance of 2.5 ? above plane of mol. and binding energy (¦¤E)is calculated using B3LYP functional and 6-31 + G(d,p) basis set, which shows difference between energy of [benzene….Metal ion complex] and sum of energy of [benzene] and [cation M⁺]. Binding energies of cation-¦Ð complexes on polyacenes are determined and studied hopping dynamics. Binding energies as well as hopping energies for cations to polyaromatic hydrocarbons follows the order Li⁺>Na⁺>K⁺. Binding energies (¦¤E) decreases with size of cation(M+) as Li⁺>Na⁺>K⁺. When binding energy (¦¤E or ¦¤G) decreases, in cation-¦Ð complexes, reaction rate k increases. This study has applications in computing rate of the reactions and in thermodn. properties of chem. reactions.

Materials Today: Proceedings published new progress about 191-07-1. 191-07-1 belongs to catalysis-chemistry, auxiliary class Electronic Materials, name is Coronene, and the molecular formula is C24H12, COA of Formula: C24H12.

Referemce:
https://courses.lumenlearning.com/boundless-chemistry/chapter/catalysis/,
Catalysis – Wikipedia

Xia, Mingjin published the artcileCatalytic upgrading of ex-situ heavy coal tar over modified activated carbon, HPLC of Formula: 191-07-1, the publication is Fuel (2022), 122912, database is CAplus.

Com. activated carbon (AC) was modified by steam activation (ST) and chem. activation (AT), and their catalytic upgrading of ex-situ heavy coal tar was investigated. The results show that both AT and ST methods could significantly increase the total surface area, promote the formation of mesopores, and further improve the catalytic upgrading performances. The light tar content was increased to 90.5% over AC-0.25ST and 85.0% over AC-2AT, resp. The specific textural properties of AC exerted an obvious effect on the resultant tar quality, and a good linear relationship between light tar content and mesoporous surface area of AC was first revealed. The removal of minerals in AC is unbeneficial to the tar upgrading, suggesting that the minerals play a catalytic role. The modified ACs could obviously increase the contents of light oil and naphthalene oil, and the pitch content was declined to 9.5% over AC-0.25ST. H₂ and CH₄ yields were also remarkably increased during tar upgrading. The resultant ACs exhibited good selectivity to benzenes and naphthalenes during tar upgrading, along with a decrease in aliphatic compounds and more than 3-ring polycyclic aromatic hydrocarbons (PAHs), and 50.3% and 47.2% naphthalenes were acquired over the AC-0.25ST and AC-2AT, resp. This study is expected to guide the preparation of upgrading catalysts and the products regulation during the catalytic upgrading of heavy coal tar.

Fuel published new progress about 191-07-1. 191-07-1 belongs to catalysis-chemistry, auxiliary class Electronic Materials, name is Coronene, and the molecular formula is C3H12Cl2N2, HPLC of Formula: 191-07-1.

Referemce:
https://courses.lumenlearning.com/boundless-chemistry/chapter/catalysis/,
Catalysis – Wikipedia

Yan, Fei-fei published the artcileTriorganotin coordination polymers based on three dicarboxylate ligands containing flexible S-S bonds: synthesis, structures and in vitro antitumor activity, Safety of 2,2′-Dithiodibenzoic acid, the publication is Journal of Organometallic Chemistry (2019), 156-162, database is CAplus.

Six new triorganotin complexes, [(R₃Sn)₂(O₂CC₅H₃NS)₂]_n (R = Me: 1; n-Bu: 2), [(R₃Sn)₂(O₂CC₆H₄S)₂]_n (R = Me: 3; n-Bu: 4), [(R₃Sn)₂(O₂CCH₂S)₂]_n (R = Me: 5; n-Bu: 6) have been obtained by the reaction of R₃SnCl (R = Me, n-Bu) with the corresponding dicarboxylate ligands (H₂L¹ = 6,6′-dithiodinicotinic acid, H₂L² = 2,2′-dithiodibenzoic acid, H₂L³ = dithiodiglycolic acid). All the compounds were characterized by elemental anal., IR, NMR, and X-ray crystallog. The structural anal. reveals that complexes 1–6 display various 2D metal-organic framework structures including wave-like, corrugated and double-layer, which is attributed to the twisting of the ligands around flexible S-S bonds. Addnl., in vitro cytotoxic investigation of complexes 1–6 were also conducted by employing human cervix cell lines (HeLa) and human lung cancer cells (A549).

Journal of Organometallic Chemistry published new progress about 119-80-2. 119-80-2 belongs to catalysis-chemistry, auxiliary class sulfides,Carboxylic acid,Benzene, name is 2,2′-Dithiodibenzoic acid, and the molecular formula is C20H28B2O4S2, Safety of 2,2′-Dithiodibenzoic acid.

Referemce:
https://courses.lumenlearning.com/boundless-chemistry/chapter/catalysis/,
Catalysis – Wikipedia

Wang, Qiuju published the artcileComparative study of female Chinese mitten crabs based on their sizes and weights, Related Products of catalysis-chemistry, the publication is Journal of Food Science and Technology (New Delhi, India) (2022), 59(7), 2572-2583, database is CAplus and MEDLINE.

The Chinese mitten crab (Eriocheir sinensis) is an important aquaculture species in China. While the price of a large crab will generally be 2-5 times higher than that of smaller crabs, it remains unknown whether nutritional quality is affected by market price. To investigate the effect of size on nutritional composition, adult female crabs were collected and assigned to grades I-IV according to decreasing size. The results showed that meat yield and conditional factors were significantly (P < 0.05) reduced with the decreasing size. The different sizes did not significantly (P > 0.05) affect levels of moisture, crude protein (except for hepatopancreatic crude protein), and total lipid. Grade III crabs had the largest hepatopancreatic crude protein level, which was significantly (P < 0.05) increased compared with grade I crabs. A balanced amino acid composition was found in grade IV crabs, while crabs from grades II and IV had the highest essential amino acids score. Levels of highly unsaturated fatty acids, including C22:6n3, and the ratios of n-3 polyunsaturated fatty acids (PUFA)/n-6 PUFA and C22:6n3 (DHA)/C20:5n3 (EPA) in the hepatopancreas were significantly (P < 0.05) increased in grade III crabs compared with the other grades. In conclusion, among the four grades smaller female crabs (average weight: 93-112 g, grades III-IV) displayed an optimal nutritional quality.

Journal of Food Science and Technology (New Delhi, India) published new progress about 6217-54-5. 6217-54-5 belongs to catalysis-chemistry, auxiliary class Alkenyl,Carboxylic acid,Aliphatic hydrocarbon chain,Metabolic Enzyme,RAR/RXR,Natural product, name is Docosahexaenoic Acid, and the molecular formula is C7H6Cl2, Related Products of catalysis-chemistry.

Referemce:
https://courses.lumenlearning.com/boundless-chemistry/chapter/catalysis/,
Catalysis – Wikipedia