Some New Photographic Chemicals

A new gastroscope with biopsy and photographic facilities some suggestions on how to pass it.

Clear, comprehensive, and unequivocal intragastric viewing, especially with accurate biopsy facilities, has been the aim of surgeons since successful cystoscopy was established. Cystoscopy revolutionized and rationalized diagnosis and treatment in genito-urinary surgery. None the less it was slow to develop and to be brought into regular use largely because, in the male urethra, the passage was...

Regulation of New Chemicals

Conversion Yields of Some Photographic Emulsions and Related Factors

A method is presented for the determination of the effective average projected grain diameter (d^) using visual analysis of enlargements of Kodak Tri-X Pan and Kodak Royal-X Pan emulsions. Each was exposed to three light sources of color temperatures 6100°K, 2850°K, and 2040°K, and was developed in Kodak developers HC-110, DK-50, and D-19 for 5, 8, 12, and 20 minutes at 68°F. For 5to 20-minute ...

synthesis and characterization of some new cyclometalated organoplatinum(ii) complexes containing phosphite ligand

در این تحقیق روشی جهت سنتز یک سری از کمپلکس های پلاتین (ii) حاوی لیگاند های دهنده ی فسفری شامل فسفیت و فسفین ارائه شده است. واکنش پیش ماده ی پلاتین (ii)،trans/cis- [ptcl2(sme2)2] ، با 2 اکی مولار از لیگاند p(oph)3در حلال بنزن کمپلکس1، cis-[ptcl2(p(oph)3)2] را تولید می نماید. جهت سنتز کمپلکس سایکلو متال فسفیتی، کمپلکس 1 با 1 اکی والان واکنشگر ptcl2 در حلال زایلن در شرایط رفلاکس زیر گاز آرگون م...

Endocrine-Disrupting Chemicals: Some Actions of POPs on Female Reproduction

Persistent organic pollutants (POPs), such as polychlorinated dibenzo-p-dioxins (PCDDs) and dibenzofurans (PCDFs), polychlorinated biphenyls (PCBs), and polybrominated ethers (PBDEs), chloronaftalens (PCNs), and bisphenol A (BPA), are stable, lipophilic pollutants that affect fertility and cause serious reproductive problems, including ovotoxic action, lack of ovulation, premature ovarian failu...