نتایج جستجو برای: kjeldahl method

تعداد نتایج: 1630451  

2013
Wangkheirakpam Radhapiyari Devi

Aeschynomene aspera L. is a wild annual legume growing in periodically waterlogged soils in Manipur, India with profuse stem nodulation. Nodules are formed on the stem at the emergence of lateral root primordia, called nodulation sites. They are distributed on vertical rows all along the stem and branches. Stem nodules are hemispherical in shaped, dark green outside and contain a red-pigmented ...

Journal: :Journal of AOAC International 1999
J K Oygard A K Lundebye K Julshamn

A simple, rapid, and reliable method was developed for determination of inorganic As in biological samples such as fish fillet. Inorganic AS was distilled from the sample as AsCl3 with HCl. The separated inorganic AS was determined by flow-injection hydride-generation atomic absorption spectrometry after prereduction with KI and HCl. The influences of various concentrations of KI, ascorbic acid...

2016
J.-L. Maubois D. Lorient

Protein content of any source is classically determined through the analysis of its nitrogen content done for more 100 years by the Kjeldahl method, and the obtained result is multiplied by a number named nitrogen conversion factor (NCF). The value of NCF is related to the amino acid composition of the protein source and to the eventual presence of side groups covalently bound to some amino aci...

Journal: :Journal of animal science 2003
M Ihnat

A wide range of minerals occurs in feedstuffs as naturally occurring and purposely added elements, as well as by adventitious contamination. These mineral elements can generally be classified as nutritionally essential major elements, nutritionally essential minor and trace elements, and those regarded as toxic or with an essential/toxic duality. A survey is presented of methods used for the de...

Journal: :The Analyst 1999
J Tsaknis S Lalas E Evmorfopoulos

The oxidation state of traditional fish products was measured by determining the malondialdehyde (MDA) level by HPLC and the results were compared to those given by a spectrophotometric method. The procedure involves oxidation of the products by incubation at 40 degrees C for 3 d. Samples were steam distilled in a Kjeldahl distillation apparatus and the MDA was determined in the aqueous distill...

Journal: :Bioresource technology 2013
Seyed Mohammad Hosseini Hamidi Abdul Aziz

The effects of thermochemical pretreatment and continuous thermophilic conditions on the composting of a mixture of rice straw residue and cattle manure were investigated using a laboratory-scale composting reactor. Results indicate that the composting period of rice straw can be shortened to less than 10 days by applying alkali pre-treatment and continuous thermophilic composting conditions. T...

2014
Wilfried VYNCKE

The determination of total volatile bases (TVB) is probably the oldest objective chemical method for assessing the spoilage of fishery pro­ ducts. It was proposed about a century ago and was already published as standard method for the inspection of fish in Germany in the first years of this century (KÖNIG, 1910). This simple method is still widely used. A European Union directive on fish hygie...

Journal: :Journal of tropical resources and sustainable science 2021

Blaptica dubia is a cockroach that used as feed for most reptiles and amphibians because of itnutritive value. Its alternative protein sources can replace the current high priced imported animalfeed such fishmeal, soybeans meat. It has potential an animal minimize highlivestock farming cost farmers. A study was conducted to determine nutritionalcomposition (moisture, ash, crude protein, chitin ...

Journal: :Jurnal Biodjati 2022

Gelodok or mudskipper fish are unique that have the ability to live in both aquatic and terrestrial areas. Some Indonesian who coastal areas use this for consumption. Types of abundant Indonesia from genera Boleophtalmus, Periophthalmodon Periophthalmus, where not all types been studied their nutritional content. The aim study was analyze content Boleophthalmus boddarti Periophthalmus variabili...

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