Natural & Applied Sciences

Natural & Applied Sciences Research Papers/Topics

Incidence of Staphylococcus aureus in Street Vended Food Sold in Calabar Municipality Nigeria

Street vended foods are the major source of food borne diseases in most parts of sub-Saharan Africa including Nigeria. In this study, six samples each of six different vended foods obtained in Calabar municipality were evaluated for bacteriological quality and presence of Staphylococcus aureususing standard microbiological techniques. Each food was examined macroscopically for evidence of spoilage, followed by culture isolation for Staphylococcus aureus. The organisms isolated were subjected ...

Ethanolic extract of Jatropha gossypifolia exacerbates Potassium Bromate-induced clastogenicity, hepatotoxicity, and lipid peroxidation in rats

Extracts  of  J.  gossypifolia  L.  have  been  reported  to  have  several  medicinal  values,  including potential  anti-cancer  and  anti-inflammatory  properties.  In  this  study,  we  investigated  the  anti-clastogenic and  hepatoprotective,  effects  of  the  ethanolic  leaf  extract  of  J.  gossypifolia  L.  in  potassium  bromate (KBrO3)-induced  toxicity  in  rats.  The  general  trend  of  the  results  indicates  significant  increases  (p 

Brain, lung, and heart oxidative stress assessment of an overthe-counter pyrethroid insecticide product in Nigeria

We  evaluated  the  brain,  lung,  and  heart  oxidative  stress  in  rats  exposed  to  aerosol  of  an  over-thecounter  pyrethroid  insecticide  product  in  Nigeria.  The  experimental  animals  were  randomly  divided  into  four  groups: group  I  (control)  was  not  exposed  to  the  insecticide  aerosol,  while  groups  II,  III,  and  IV  were  exposed  to  6.0  mL  m-3, 12.0  mL  m-3,  and  18  mL  m-3  of  insecticide  ae...

Potential Genotoxicity, Hematotoxicity and Clastogenicity of Three Commonly Consumed Polyherbal Formulations in Abeokuta South-West Nigeria

Background:  The  current  upsurge  in  the  use  of  polyherbal  remedies  and  coupled  with  loose  regulation  on  public access  to  these  products  underscore  research  efforts  to  evaluate  their  biochemical  effect,  noting  also  that  many  of  the polyherbal  medicines  lack  scientific  evidence  to  support  their  medicinal  claims.  Objective:  We  therefore  investigated  the potential  genotoxicity,  hematotoxicity  and  ...

Extra-pulmonary oxidative stress investigations of an over-the-counter pyrethroid insecticide product in rats

Extra-pulmonary  oxidative  stress  investigations  of  exposure  to  aerosol,  of  an  over-the-counter pyrethroid  insecticide  product  in  Nigeria  in  Wistar  rats  were  carried  out.  Four  groups  of  five  animals each  were  used  in  this  study,  and  were  exposed  to  different  concentrations  of  the  insecticide  aerosol. Malondialdehyde  (MDA)  and  reduced  glutathione  (GSH)  concentrations  were  determined  in  the  live...

Edible camphor-induced histopathological changes in hippocampus and cerebral cortex following oral administration into rats

Introduction:  Raw edible camphor (EC), and as component of herbal infusions  are widely used to treat pile, back pain, erectile dysfunction, and as  an aphrodisiac especially in preparation  for sexual intercourse by men. It has been traced in umbilical cord, blood,  fetal, adipose,  and other tissues including brain, where it bioaccumulates.  Methods:  The study, therefore, investigated the possible histopathological changes  in brain, heart, and  spleen that may result following ...

Induction of micronuclei in bone marrow cells and hepatotoxicity of one of the most common over-the-counter pyrethroid insecticide products in Nigeria

Increasing environmental pollution in the tropics is creating a breeding ground for mosquitoes, leading to increasingly frequent use of insecticides to combat home infestation of mosquitoes, the vector of malarial parasites. Household members are therefore more prone to aerosol exposure and subsequent health effects. We assessed the hepatotoxic and clastogenic effects in rats exposed to different levels of aerosols of one of the insecticides most commonly in used in Nigeria. There were signif...

ANTICLASTOGENIC AND HEPATOPROTECTIVE PROPERTIES OF GINGER (ZINGIBER OFFICINALE) EXTRACT AGAINST NITROBENZENE-INDUCED TOXICITY IN RATS

Ginger  or  Zingiber  officinale  has  been  reported  to  possess  antioxidant  activities  that  can protect  against  free  radical  damage.  We  therefore  carried  out  this  study  to  investigate  the  possible ameliorative  effects  of  ginger  against  the  clastogenicity,  hepatotoxicity  and  oxidative  stress  induced by  nitrobenzene  (NB)  administration  in  wistar  rats.  Twenty  male  wistar  rats  were  divided  into  four g...

ROLE OF CIRCADIAN CLOCK GENES IN THE REGULATION OF CELL CYCLE PROCESSES

One  interesting  branch  of  biochemistry  which  scientists  are  still  trying  to completely  unravel is the  area  of  chronobiochemistry.  The  history  of  chronobiology  is  dated  400  B.C.,  when  Androsthenes observes  that  leaves  of  certain  trees  open  during  the  day  and  close  at  night.  It  was  only  recently  that the  first  human  clock  gene  was  discovered.  All  living  organisms  possess  an  internal  bio...

Effect of edible camphor administrations on levels of steroid and thyroid hormones in male wistar rats_content_1

ABSTRACT Background:  Edible  camphor  (EC)  is  one  of  the  ingredients  in  the  preparation  of  local infusion  for  the  management  and  treatment  of  pile,  back  pain,  and  erectile  dysfunction, which  are  practices  commonly  in  the  south-western  part  of  Nigeria.  Methods:  Thirty  rats  were  used  for  the  study,  and  were  divided  into  six  groups  of  five rats  each.  Group  I  animals  served  as  normal  ...

Role of mitochondria in apoptosis

In  living  cells,  especially  eukaryotes,  mitochondria  involvement  appears  to  be  important in  the  general  status  of  every  aspect  of  life.  Apoptosis  as  a  programmed  cell  death  is  mandatory to  all  life  process  thus,  mitochondria  might  be  describe  as  organelles  that  serves  as  a  gatekeeper to  trap  a  variety  of  proapototic  protein  and  prevent  the  functions  of  this  proteins  in  the  cytosol...

Use of the Biomerieux id 32c Fungal Identification System for Fungal Isolated from Mother and Child Hospital Dump Site in Akure, Ondo State Nigeria

The purpose of this research work is to isolate and identify Using ID 32C API kit and to determine the antifungal sensitivity profile of fungi isolated from the mother and child dump site Akure, Ondo state, Nigeria.   Ten isolates (Yeast, Aspergiliusflavus, Aspergiliusniger, Fusariumsolani, Candida albucan, Candida kruise, Phytoptera, Rhizopusstolonifer, Trichodermhorizianum,Fusariumvortezelium) were used for this research work.Potato Dextrose Agar was used to isolate and prepared for enume...

Bio-prospective Screening of Antibacterial and Phytochemical Activity of Caesalpinia pulcherrima.Linn (Pride of Barbados) on Selected Clinical Isolates

This work was carried out to evaluate the antibacterial and Phytochemical activities of Caesalpiniapulcherrima  leaf and stem bark on some clinical isolates. The plant parts were collected from St. Benedict Catholic Church premises, Owena Barracks, Akure, Ondo State. Crude ethyl acetate extracts of Caesalpinia pulcherrima leaves and stem bark was assayed for its antibacterial activity against Staphylococcus aureus, Klebsiella pneumonia, Pseudomonas aeruginosa, Bacillus subtilis, Escheric...

Prospects of Essential Oils in Drug Discovery

Abstract Essential oils (EO), according to the International Standard Organization (ISO)  defines essential oil as the product obtained from parts of plants by distillation with water steam and the product obtained by expression from pericarp of medicinal plant. The rapid growth and increase of the knowledge of identification, extraction, purification and characterization of essential oils in most local plant species is fast becoming an important aspect of the drug production process. ...

Evaluation of Antimicrobial Activity, Synergistic Efficacy, Qualitative and Quantitative Phytochemical Determination of Alstonia Boonei Leaf and Stem Bark on Selected Clinical Isolates

Abstract This study evaluated the antimicrobial activity, of Alstonia boonei leaf, stem bark and the synergistic efficacy of A. boonei leaf plus stem bark on seven bacteria (Gram positive and Gram negative bacteria) which are strains of Escherichia coli, Staphylococcus aureus, Bacillus subtilis, Pseudomonas aeruginosa, Proteus viridans, Salmonella typhi and Klebsiella pneumoniae, and three fungal isolates which are Candida albicans, Aspergillus flavus and Trichophyton rubrum. This study also ...


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