Subscribe to the gold package and get unlimited access to Shamra Academy
Register a new userDetermination of NOECs for the Most Important Toxic Substances to the Rotifer, Brachionus Calyciflorus Using Electrophoresis Method
تحديد قيم NOECs لأهم المواد الكيميائية السامة للدواري تقانة باستخدام (Brachionus calyciflorus (Rotifera الرحلان الكهربائي
1197
0 11
0
(
0
)
Created by
Shamra Editor
Ask ChatGPT about the research
أجــري هــذا البحــث بهــدف تحديــد قــيم النقــاط الحرجــة للــسمية الحــادة (NOECs) (concentrations effect observed No) لثماني مواد كيميائية سامة مختلفة لدى النوع الـدواري calyciflorus Brachionus بالاعتماد على خاصية تراجع تراكيز مكوناته البروتينيـة، حيـث حـددت باستخدام تقانة الرحلان الكهربائي (Electrophoresis PABE-SDS) الأوزان الجزيئيـة للمكونـات البروتينية التي انخفض تركيزها بتأثير المواد السامة المختلفة، و أثبتـت التجـارب أن المـواد الـسامة المستخدمة تسبب تراجعاً في تراكيز البروتينات بشكل عام، و في تراكيز البروتينات ذات الأوزان الجزيئية (43KDa ، 67KDa) بشكل خاص، كما حددت قيم النقاط الحرجة (NOECs) لكل مادة مـن المـواد السامة المستخدمة. و تكمن أهمية هذا النوع من التجارب في كونها لا تستغرق وقتاً طويلاً مقارنة بتجارب السمية التي تتم خلال مدة عمر الحيوان التكاثرية. كما تبين أن حـساسية اختبـار NOECS للبـروتين 43KDa أعلى من حساسية اختبار NOECS للبروتين 67KDa لمعظم المواد الكيميائية المستخدمة في البحث، و أعلى من حساسية تجارب السمية المطبقة علـى حيـاة الفـرد التكاثريـة (-Reproductive NOECs) لأربع مواد كيميائية فقط.
Sublethal toxicity studies were conducted with a rotifera (Brachionus calyciflorus) to determine the No observed effect concentrations (NOECs) of a different eight toxic substances based on the protein mass reduction. Protein mass (with moleculer weight 43KDa - 67KDa) was quantified using electrophoresis method. Quantitation of protein concentrations demonstrated that toxicant stress reduced protein concentrations. The NOECs-43KDa and NOECs - 67KDa were reported. Since in vivo protein cocentrations can be assessed in a short time, these results can be obtained in only a few hours, which is substantially less than traditional whole animal reproductive tests. NOECs - NOECs - 43KDa test were generally more sensitive end points than NOECs - NOECs-67KDa test and more sensitive than standard whole animal toxicity tests for only four toxicants.
References used
Arndt, H. (1993). Rotifers as predators on components of the microbial web (bacteria, heterotrophic flagellates, ciliates) – a review. Hydrobiologia, 255/256, 231-246
Blackstock, J. (1994). Biochemical regulatory responses of invertebrates to natural environmental change and pollution. Oceanogr. Mar. Biol. Ann. Rev. 21, 263-313
Burten, G. A; and Lanza, G. R. (1987). Aquatic microbial activity and macrofaunal profiles of an Oklahoma stream. Water Res. 21, 1173-1182
rate research
Read More
Study was conducted in five locations as the important areas for
pomegranate cultivation and production in Yemen, during the period (15/1–
15/8/2004). Eight accessions of local pomegranate were used in this study:
Taefi, Orkobi, Mellies–Hada, Khaz
emy, Sommaty, Kodary, Chiny and Mellies–
Raudha in addition to the wild pomegranate type (Socotria). The
morphological characters were determined for leaves, flowers,fruits and seeds.
The chemical analysis for juice was also assessed. Maximum rate for fruit
weight was 527.3 gm for Kodary accession, whereas fruit Juic varied between
49.5–63.2%, while peel / fruit was varied between15% in Taefi and 35.9 % in
Chiny, whereas the peel thickness varied between 1.5–4.2 mm. The Scotria was
found to be evergreen, and flowers around the year. Kazemy accession gave
higher fruits number/tree with rate 246.7. The greatest rate of T.S.S and
Vitamin C were 18.57% and 11.12 mg respectively for Chiny accession, and the
highest content of organic acids in these accessions was 0.54 % for Taefi.
This study was carried out using white German goat race during 2000-2001
at the Research Center of Animal Production Division, Humboldt University,
Berlin, in order to examine the validity of the Lactocorder instrument, which
has been used for det
ermination of milking curve of cows, to determine the
milking curve of goat, and to study the timing changes of this curve.
A sensitive, simple and selective spectrofluorimetric method
has been proposed for determination Captopril (CPT) in pure form
and pharmaceutical preparations. This method depends on the
formation of complex between Captopril and Copper (II) at
pH=3.5.
With the rapid growth in technology, social media activity has seen a boom across all age groups. It is humanly impossible to check all the tweets, comments and status manually whether they follow proper community guidelines. A lot of toxicity is reg
ularly posted on these social media platforms. This research aims to find toxic words in a sentence so that a healthy social community is built across the globe and the users receive censored content with specific warnings and facts. To solve this challenging problem, authors have combined concepts of Linked List for pre-processing and then used the idea of stacked embeddings like BERT Embeddings, Flair Embeddings and Word2Vec on the flairNLP framework to get the desired results. F1 metric was used to evaluate the model. The authors were able to produce a 0.74 F1 score on their test set.
The ladybird predatos (Coccinella septempunctata L.) was bred by the cross
mating method, which is followed in all international bio – control centers, to
be transformed from the natural local strain into laborators one, which enable
continous pro
duction and collection of predator groups without affecting the
numerical measurements of the most relevant morphological parameters, such
as insect's body length, and the biological traits, such as fertility, predators
efficacy multiplication, longivity, metamorphesis duration, and sex ratio.
Log in to be able to interact and post comments
comments
Fetching comments
Sign in to be able to follow your search criteria
