Extraction of Chlorophyll-a from Eutrophic Water by Repeated Freezing and Thawing-Extraction Method
نویسندگان
چکیده
منابع مشابه
extraction and acetylation of purified trypsin from bovin pancreas and study of some its physico-chemical properties
آنزیم تریپسین در شرایط قلیایی ناپایدار می باشد .و فعالیت پروتئولیتیکی تریپسین منجربه خود هضمی آن در جایگاههای خاصی می گردد. بنابر این آنزیمی با ناپایداری بالا محسوب میگردد. در سالهای اخیر موفق شدند که با ایجاد تغیرات شیمیایی با اضافه کردن فلزات خاص ، کلسیم و یا عمل استیلاسیون منجر به افزایش پایداری آنزیم تریپسین گردند. مطالعات در حال حاضر نشان می دهد که تریپسین استیله شده فعالیت آنزیمی خود را ...
15 صفحه اولThe Effect of Freezing-thawing on Dna Extraction from Cryptosporidium Oocysts in Fecal Samples
The DNA of Cryptosporidium Oocysts was extracted from fecal samples by using Commercial Wizard Genomic DNA purification general kit, tow freezingthawing protocols have been compared in this study: deep freezer for three cycles and liquid nitrogen for fifteen cycles, the results indicate that the second protocol was more influential in obtaining a sufficient amount of DNA from Oocysts of Cryptos...
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Sperm storage via freezing has been useful for men who have difficulty masturbating during assisted reproductive technology (ART) programs and before impotency caused by chemotherapy, vasectomy, and other procedures. Studies were undertaken to evaluate the extent of cryoinjury to sperm after repeated freezing and thawing. The results showed that normozoospermic and oligozoospermic sperm survive...
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The following bacteria were employed as test organisms: Lactobacillus fermenti strain 69L-3, Escherichia coli strain 69L-15, and Serratia marcescens strain ATCC 274. They were cultivated as outlined previously (Major et al., 1955). Broth cultures of the organisms were centrifuged, the spent broth pipetted off, the cells resuspended in a minimal amount of fresh broth, and then the suspension dil...
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Production of vanillin from natural green vanilla pods was carried out by enzyme-assisted extraction combined with pre-freezing and thawing. In the first step the green vanilla pods were pre-frozen and then thawed to destroy cellular compartmentation. In the second step pectinase from Aspergillus niger was used to hydrolyze the pectin between the glucovanillin substrate and β-glucosidase. Four ...
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ژورنال
عنوان ژورنال: Asian Journal of Chemistry
سال: 2014
ISSN: 0970-7077,0975-427X
DOI: 10.14233/ajchem.2014.15700