Online English Summarizer tool, free and accurate!
Studies involving the analysis of materials including food, water, milk, and, in some cases, air require quantitative enumeration of microorganisms in the substances.Many methods have been devised to accomplish this, including direct microscopic counts, the use of an electronic cell counter such as the Coulter Counter, chemical methods for estimating cell mass or cellular constituents, and turbidometric measurements for increases in cell mass, and the serial dilution-agar plate method.Direct microscopic counts require the use of a specialized slide called the Petroff-Hausser counting chamber, in which an aliquot of a eukaryotic cell suspension is counted and the total number of cells is determined mathematically.The chamber contains an etched grid and has improved Neubauer rulings (1/400 square mm).The center square millimeter is ruled into groups of 16 small squares, and each group is separated by triple lines, the middle one of which is the boundary.The boundary lines (Neubauer rulings) are the center lines of the groups of three.The ruled surface is 0.02 mm below the cover glass, which makes the volume over a square millimeter 0.02 mm3 (cubic mm).The number of cells counted is calculated as follows:
Number of cells per mm = number of cells counted * dilution * 50,000The Petroff-Hausser counting chamber is a thick glass microscope slide with a chamber 0.02 mm (1/50 mm) deep in the center.
Studies involving the analysis of materials including food, water, milk, and, in some cases, air require quantitative enumeration of microorganisms in the substances.
Many methods have been devised to accomplish this, including direct microscopic counts, the use of an electronic cell counter such as the Coulter Counter, chemical methods for estimating cell mass or cellular constituents, and turbidometric measurements for increases in cell mass, and the serial dilution–agar plate method.
Direct microscopic counts require the use of a specialized slide called the Petroff-Hausser counting chamber, in which an aliquot of a eukaryotic cell suspension is counted and the total number of cells is determined mathematically.
The Petroff-Hausser counting chamber is a thick glass microscope slide with a chamber 0.02 mm (1/50 mm) deep in the center.
The chamber contains an etched grid and has improved Neubauer rulings (1/400 square mm).
The rulings cover 9 mm2. The boundary lines (Neubauer rulings) are the center lines of the groups of three.
The center square millimeter is ruled into groups of 16 small squares, and each group is separated by triple lines, the middle one of which is the boundary.
The ruled surface is 0.02 mm below the cover glass, which makes the volume over a square millimeter 0.02 mm3 (cubic mm). All cells are counted in this square millimeter.
The number of cells counted is calculated as follows:
Number of cells per mm = number of cells counted * dilution * 50,000
Summarize English and Arabic text using the statistical algorithm and sorting sentences based on its importance
You can download the summary result with one of any available formats such as PDF,DOCX and TXT
ٌYou can share the summary link easily, we keep the summary on the website for future reference,except for private summaries.
We are working on adding new features to make summarization more easy and accurate
ستخدام الروبوتات يعزز التعاون والعمل الجماعي بين الأطفال حيث يتعاونون معا لبرمجة وتشغيل الروبوتات وح...
إذا تسبب عامل في فقد أو إتلاف أو تدمير آلات أو منتجات يملكها صاحب العمل أو هي في عهدته وكان ذلك ناشئ...
Functions in programming are blocks of code designed to perform specific tasks. There are two types ...
الهندسة هي مجال يلعب دورًا أساسيًا في تطوير وتحويل المجتمع الحديث. يكرس المهندسون جهودهم لتصميم وبنا...
في الختام، يمكن القول بأن الوطن ليس مجرد ضرورة ملحة بل هو الركيزة الأساسية التي يستند إليها الإنسان ...
Developmental states should not be confused with social democratic states which have a broader socia...
في هذا الوقت الذي كان الطقس فيه غير مستقر، حيث جمع ليبل ثلاثاً و سبعين نقطة، و اكتشف المخبأ الموجود ...
دار الحكمة في الأندلس كانت مظهرًا حضاريًا اشتهر في المجتمع الأندلسي، وهي تعبر عن المراكز الثقافية وا...
فِي قَدِيم الزَّمَان، كانَتِ الْعائِلَةُ تَقْضي الصّيفَ قُرب الْبُحيرَةِ، حَيْثُ يَسْبَحُونَ . وَلَك...
تأتي أهمية الدراسة كونها تعد موضوعا ذو حيوية واهمية في موضوعات التدقيق المالي، وهو البحث في تأثير اس...
Its made up of a number of stamping which are slotted to receive the windings. the stator carries a ...
قصة سيدنا موسى والخضر تحكي عن لقاء موسى عليه السلام برجل صالح اسمه الخضر، الذي كان يمتلك علماً خاصاً...