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Ask an Expert Topic Forum: Grades K-5: Physical Science
Entertainment Entertainment Какое можете посоветовать надёжное и проверенное онлайн казино для игры? Re: Entertainment Привіт, тепер в азартні ігри можна навіть грати з мобільного пристрою абсолютно безкоштовно і на гроші. Депозит поповнити не складає труднощів - через будь-яку карту і електронний гаманець, виведення швидке. Ваше завдання вибрати ігровий клуб з хорошою віддачею вірніше високим коефіцієнтом, як наприклад цей заклад https://mrcasinos.net/ не забувайте читати відгуки… Read more
Ask an Expert Topic Forum: Grades K-5: Physical Science
Games Games Есть ли здесь любители онлайн игр? Почему вам нравится они? И где вы вообще играете? Re: Games Начните с бесплатной игры, сначала разведайте что к чему, применяйте минимальные стратегии, они есть в интернете. Здесь https://slotscity.ua/ru вы можете получить бездепозитный бонус после регистрации, на сайте подробности, рейтинг игровых заведений, не забывайте читать отзывы участников. Read more
Ask an Expert Topic Forum: Grades 9-12: Physical Science
Time Travel, Trans Dimensional space query. Time Travel, Trans Dimensional space query. Hello, My name is Dariusz, today I have come to a concept of creating and performing time travel, albeit just a theory not yet molecule transport part yet. I just wanted to see if anyone can help me grasp to see world as a 36 Dimensional space instead of 5-6 dimensions that we are used to. You may ask why is that, how can there be so many dimension. Well it may be called something else, I am not up to… Read more
Water Quality Science Fair Project Water Quality Science Fair Project Hi! I am looking to start a science fair project that has something to do with water quality. I also want to include some elements of manure/fertilizer or animals, like Daphina. One idea I had was to test some different bodies of water around me and to ask people to guess which one was the most polluted, but that doesn't pass the science fair standards at my school. We have to have changeable variables throughout our… Read more
Measuring Bacteria against Disinfectants Measuring Bacteria against Disinfectants Good afternoon, I would like to do a science project where I measure the amount of bacteria that is left on a cutting board after cutting chicken and then I'd like to spray different disinfectants or cleaning products on the cutting board and compare which product disinfects the cutting board best. How can I measure the bacteria on the cutting board (before and after a disinfectant) and how can I tell if a… Read more
Ask an Expert Topic Forum: General Discussion
Polymer Polymer Polymer Elemental and Chemical Analysis The material, chemical structure, chemical composition and physicochemical properties can significantly impact the polymer's function. For example, polymeric functional membrane materials require the polymer to have a microporous structure or a diffusion function  to meet the selective permeation requirement of the separated material in the membrane. The reactive functional polymer needs to have a certain swelling property or a range of… Read more
Ask an Expert Topic Forum: General Discussion
CRISPR CRISPR CRISPR Cas9 Gene Editing for Target Identification and Validation CRISPR Cas9 gene editing system consists of a Cas9 protein (or other homologous protein) and a single guide RNA (gRNA). The function of the CRISPR system involves RNA-guided cleavage of the exogenous double-stranded DNA, followed by imprecise repair through either imprecise non-homologous end joining (NHEJ) or template-dependent homologous directed repair (HDR) pathways. CRISPR Cas9 works just like a pair of… Read more
Ask an Expert Topic Forum: General Discussion
Fluorescence Application Fluorescence Application Fluorescence Labeling of Peptides Fluorescent labels or probes are ideal for many imaging and diagnostic applications. Fluorescent groups can be covalently connected to the N-terminal or C-terminal, although it is recommended to bind to the N-terminal. FRET pairs composed of receptors and quenching agents can be connected internally or externally. For longer sequences, it is recommended that you connect FRET pairs internally. Fluorescent… Read more
Ask an Expert Topic Forum: General Discussion
drug delivery system drug delivery system PEGylation of Liposomes Liposome is an ideal drug delivery carrier. It has targeted properties, longer blood retention time and higher organ distribution selectivity, can improve the efficacy of drugs and reduce toxic side effects. Ordinary liposomes have the disadvantage of being easily cleared from the systemic circulation by liver and spleen macrophages. In this case, PEGylation can solve the above shortcomings, making liposomes stay in the blood… Read more
Ask an Expert Topic Forum: General Discussion
biochemistry biochemistry NHS Esters NHS esterrs are the most commonly used amine reactive reagents. Under physiological pH or even weakly alkaline conditions, NHS esters can react with primary amines to form very stable amide bonds. Both the N-terminal α-amino group and the lysine residue ε-amino group of the protein can form an amide bond with the NHS ester. The amide bond formed by NHS ester and amino group is exactly the same as the peptide bond in natural protein. NHS esters are… Read more
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Free science fair projects.