Allelopathic potential of 73 weed species in Pakistan

Introduction: Use of allelochemicals as inexpensive, biodegradable and eco-friendly substitutes for the management of weeds in crops is a central topic nowadays. Objective: The current study represented the comprehensive screening of allelopathic activity of 73 weeds in Pakistan by the Sandwich method and dish pack method. To investigate the allelochemical compound in top most allelopathic weed. Methods: Allelopathic effects of selected weeds leaves leachate were determined through sandwich technique, while volatile allelopathic effects through dish pack techniques. Qualitative and quantitative phytochemical techniques were applied to investigate allelochemical potential of Melilotus indicus. The statistical analysis of the data described the allelopathic effect of 73 weed plants on lettuce seedling growth in terms of radicle and hypocotyl elongation. Results: Elongation percentage of radicle and hypocotyl ranged 0-74 % to 0-148 % and 0-75 % to 0-84 % respectively at 10 mg concentration of dry plant powder in sandwich method while it was 2-234 % and 7-150 % at in Dish Pack method. Among the plants screened for phytotoxic activity, M. indicus contained the strongest allelochemicals. Qualitative and quantitative analysis of M. indicus showed the presence of flavonoids and phenolic compound along with other allelochemical. Conclusions: Selected weeds may have strong allelochemical potential that can help in the development of bioactive compounds from plant species to be used as natural herbicides and pesticides for sustainable management of weeds and pest.

Introducción: El uso de aleloquímicos como sustitutos baratos y amigables con el ambiente para el manejo de hierbas en plantaciones es un tema central actualmente. Objetivo: En el presente estudio se midió la actividad alelopática de 73 hierbas en Pakistán a través de los métodos "sandwich" y "dish pack", con el fin de investigar los compuestos aleloquímicos más importantes en las hierbas analizadas. Métodos: A través del método "sandwich" se determinaron los efectos alelopáticos de los lixiviados de hojas en las hierbas analizadas, mientras que el efecto alelopático volátil a través de la técnica "dish pack". Para investigar el potencial aleloquímico de Melilotus indicus se aplicaron técnicas fitoquímicas tanto cualitativas como cuantitativas. El análisis estadístico de los datos describió el efecto alelopático de 73 especies de hierbas sobre el crecimiento radicular y del hipocótilo en plántulas de lechuga. Resultados: El porcentaje de elongación radicular y del hipocotilo varió entre 0-74 % hasta 0-148 % y 0-75 % hasta 0-84 % respectivamente, con una concentración de 10 mg de polvo de planta seca con el método "sandwich". Además, fue entre 2-234 % y 7-150 % con el método "dish pack". Entre las plantas analizadas para actividad fitotóxica, M. indicus presentó los aleloquímicos más fuertes. Los análisis cualitativos y cuantitativos de M. indicus mostraron la presencia de flavonoides y compuestos fenólicos, junto con otros aleloquímicos. Conclusiones: Las hierbas seleccionadas pueden tener un potencial aleloquímico fuerte que ayude al desarrollo de compuestos bioactivos de plantas, para usar como hierbicidas y pesticidas naturales en el manejo sostenible de plagas y malas hierbas.

Synthesis of silver and gold nanoparticles from leaf of Litchi chinensis and its biological activities

Objective: To synthesize and isolate silver and gold nanoparticles from Litchi chinensis leaf methanolic extract, and to evaluate its comparative biological activities including muscles relaxant, analgesic, anti-inflammatory and antidiarrheal. Methods: The gold and silver nanoparticles were synthesized by dissolving methanolic extract in gold chloride and silver nitrate solution separately which were confirmed by colour change and UV-Vis spectroscopy, and pellets were collected through centrifugation. Biological activities of the extract were conducted on BALB/c mice through various standard methods and the data were subjected to One-way ANOVA. Results: The colorless gold chloride solution changed to purple soon after the addition of plant extract, demonstrating that the reaction took place and gold ions were reduced to gold nanoparticles, while colorless silver nitrate solution changed to light and dark brown that was indicative of silver nanoparticles. The muscles relaxant activity showed that silver nanoparticles were more effective than gold nanoparticles and methanolic extract in traction test. The analgesic activity showed that silver and gold nanoparticles showed highest percentage decrease in acetic acid induced writhing at the doses of 50, 100 and 150 mg/kg b.w. The highest anti-inflammatory activity was produced by gold nanoparticles followed by silver nanoparticles, while low activity was observed in methanolic leaf extract. Only the crude methanolic extract showed significant antidiarrheal activity as compared to the standard drug atropine sulphate, while antidiarrheal activities of gold and silver nanoparticles were non-significant. Conclusions: The present work concludes that isolated silver and gold nanoparticles from leaf methanolic extract shows strong muscles relaxant, analgesic and anti-inflammatory activities while crude methanolic extract possesses good antidiarrheal activity.

Routine or selective histopathology of gallbladder specimen after cholecystectomy for gallstone diseases

Objectives: To determine the incidence of incidental gallbladder cancer [IGBC] and to assess the need of routine histopathological examination of all gallbladder specimens after cholecystectomy for benign gallstone diseases Design: Retrospective study Setting: Department of Surgery, College of Medicine, King Saud University, KSA

Subjects: This study included all the patients who underwent elective or emergency cholecystectomy for gallstone disease at King Saud Medical City, Riyadh, Saudi Arabia between January 2012 and September 2015. Patients with preoperative suspicion of gallbladder cancer on imaging, or underwent cholecystectomy for gallbladder polyps or porcelain gallbladder were excluded from the study. Medical record of all the selected patients was reviewed and the data were collected. Interventions: Histopathological examination of gallbladder Main outcome measures: IGBC, routine histopathological examination of all gallbladder

Results: A total of 2396 patients underwent cholecystectomy for gallstones disease. All gallbladder specimens were sent for histopathological examination. IGBC was detected in nine gallbladder specimens [0.4%]. Out of 2396 patients, morphologic abnormalities were observed in 518 specimens [22.6%]. There was no reported case of IGBC with normal appearance of gallbladder specimen. Five patients underwent simple cholecystectomy for stage T1b, three patients of stage T2 tumor had further liver resection and one patient received only palliative care

Conclusions: The incidence of IGBC was 0.38%. All cases of IGBC were detected in abnormal looking thick wall gall bladder. Therefore, selective histopathology of abnormally looking specimen is recommended to reduce the cost and work load of pathologists

Pharmacognostic and phytochemical studies of Zanthoxylum armatum DC

The pharmacognostic and phytochemical investigations on the leaf, stem bark, and fruit of Zanthoxylum armatum were carried out. Macroscopic study of leaf, stem bark, and fruit of Z. armatum revealed some of the characteristic features like size, shape, color, odor and taste of the crude drug. Distinguishing fragments were identified from the powder drug. Leaf, bark, and fruit powder of this plant have higher values of total, acid insoluble, and water soluble ash as compared to the powder of this plant exhausted with ethanol and n- hexane. Extraction values in methanol were highest for leaves [20.10%] and fruit [11%], while bark showed highest value in chloroform [8.5%]. The extractive values varied among other parts with different solvents. Fluorescence analysis of the Z. Armatum leaf, stem bark, and fruit powder with various reagents showed characteristic coloration at day and under UV light. Quantitative phytochemical screening revealed the presence of many bioactive constituents in leaves, such as alkaloids [15.60+/-0.10 mg/g], sterols [71.60+/-0.10mg/g], saponins [21.57+/-0.12mg/g], tannins [34.43+/-0.21mg/g], phenols [11.66+/-0.33mg/g] and flavonoids [13.68+/-0.66mg/g]. Alkaloids [19.60+/-0.10mg/g], sterols [33.83+/-0.29mg/g], saponins [14.78+/-0.10mg/g], tannins [28.62+/-0.13mg/g], phenols [16.48+/-1.33mg/g] and flavonoids [18.33+/-1.22mg/g] were reported form the bark, while fruits were reported to have alkaloids [25.07+/-0.21mg/g], sterols [164.92+/-0.14mg/g], saponins [28.60+/-0.10mg/g], tannins [35.5+/-0.5mg/g], phenols [21.68+/-0.44mg/g] and flavonoids [22.8+/-1.33mg/g]. Z. armatum is an important medicinal plant, traditionally used for various ailments. This study will be helpful in the future pharmacognostic standardization of this important plant

In vivo antinociceptive and muscle relaxant activity of leaf and bark of Buddleja asiatica L.

The current study was designed to assess the antinociceptive and skeleton muscle relaxant effect of leaves and barks of Buddleja asiatica in animal models. In acetic acid induced writhing test, pretreatment of ethanolic extract of leaves and barks evoked marked dose dependent antinociceptive effect with maximum of 70% and 67% pain relief at 300mg/kg i.p. respectively. In chimney test, the ethanolic extract of leaves and barks evoked maximum of 66.66% and 53.33% muscle relaxant effect after 90min of treatment at 300mg/kg i.p respectively. In traction test, the ethanolic extract of leaves and barks caused maximum of 60% and 73.33% muscle relaxant effect after 90min of treatment at 300mg/kg i.p respectively. In short, both leaves and barks demonstrated profound antinociceptive and skeleton muscle relaxant effects and thus the study provided natural healing agents for the treatment of said disorders

Pharmacognostic and pharmacological evaluation of ruellia tuberosa L.

Ruellia tuberosa Linn. of family Acanthaceae was studied to investigate the microscopical, vein islet and vein termination numbers, palisade ratio, stomatal index and different chemical parameters. The antibacterial, antifungal and phytotoxic activities of the crude extract of the plant were also determined. Five bacterial species were used, of which, Salmonella typhi, Escherichia coli, and Pseudomonas aeruginosa were the most susceptible bacterial species to crude extract with MICs 10, 4.0 and 14mg/ml, respectively. Among the tested fungal species Fusarium solani and Aspergillus niger were more susceptible to crude extracts with MICs 1.34, 2.78 and 1.45 micro g/ml, respectively. At the concentration of 1000 micro g/ml the methnolic extract exhibited significant activity, at 100 micro g/ml the activity was good and at 10 micro g/ml the activity was moderate against Lemna minor. The above selected plants were shown by in vitro assays to be a potential source for natural antifungal, antibacterial and phytotoxic agents

Impact of weekend admission on the outcome of patients with acute gastro-esophageal variceal hemorrhage

Objectives: To evaluate the impact of weekend admission on the outcome of patients with acute variceal hemorrhage [AVH] Design: Retrospective study Setting: Department of Surgery, College of Medicine, King Saud University, KSA Main Outcome Measures: AVH, weekend admission and clinical outcome

Subjects: Nine hundred and thirty-seven admitted during the period 1[st] January 2005 to 31[st] July 2013 and documented to have AVH. The selected patients were divided into two groups based on the admission day [weekday or weekend admission]. The data regarding patients characteristics and outcome in both the groups were retrieved from medical records and compared by using c2 test / Fisher's exact and student T- test

Results: Weekday admissions included 685 patients, while the weekend group comprised of 252 patients. The demographic, clinical and laboratory characteristics of patients admitted with AVH in both the groups were comparable. Statistically, there was no significant difference in the need for blood transfusion [46% versus 48%, p = 0.5868], and surgical intervention [5.4% versus 4.7%; p = 0.6595] between the groups. There was a little, but statistically significant delay in endoscopic intervention in the weekend group [7.56 +/- 7.8 hours versus 9 +/- 2.32; p = < 0.0001]. However, this delay did not lead to adverse outcome for patients [mortality rate 6.8% versus 5.25%; p = 0.389]

Conclusions: The weekend admissions were not associated with increased mortality in patients with AVH. Moreover, the length of hospital stay, need for blood transfusion, and rate of surgical intervention were similar in weekdays and weekend admissions

In vivo screening of essential oils of Skimmia laureola leaves for antinociceptive and antipyretic activity

<p><b>OBJECTIVE</b>To study the screening of essential oils of Skimmia laureola leaves (SLO) for acute toxicity, antinociceptive, antipyretic and anticonvulsant activities in various animal models.</p><p><b>METHODS</b>SLO were extracted using modified Clevenger type apparatus. Acute toxicity test was used in mice to observe its safety level. Antinociceptive activity of SLO was evaluated in acetic acid induced writhing and hot plate tests. Yeast induced hyperthermic mice and pentylenetetrazole induced convulsive mice were used for the assessment of its antipyretic and anticonvulsant profile respectively.</p><p><b>RESULTS</b>Substantial safety was observed for SLO in acute toxicity test. SLO showed a high significant activity in acetic acid induced writhing test in a dose dependent manner with maximum pain attenuation of 68.48% at 200 mg/kg i.p. However, it did not produce any relief in thermal induced pain at test doses. When challenged against pyrexia evoked by yeast, SLO manifested marked amelioration in hyperthermic mice, dose dependently. Maximum anti-hyperthermic activity (75%) was observed at 200 mg/kg i.p. after 4 h of drug administration. Nevertheless, SLO had no effect on seizures control and mortality caused by pentylenetetrazole.</p><p><b>CONCLUSIONS</b>In vivo studies of SLO showed prominent antinociceptive and antipyretic activities with ample safety profile and thus provided pharmacological base for the traditional uses of the plant in various painful conditions and pyrexia. Additional detail studies are required to ascertain its clinical application.</p>

Comprehensive nutrients analysis of rhizomes of Polygonatum verticillatum

The current study was undertaken to estimate the concentration of micronutrients [Zn, Fe, Pb, Cu, Ni, Cd, Cr, Co, Sb and Mn], macronutrients [Na, Ca and K] and essential life nutrients [proteins, fats, carbohydrates and ascorbic acid] along with ash, fiber and moisture contents. Atomic absorption spectrophotometer was employed for the analysis of micronutrients while flame photometry for macronutrients. For proximate analysis [proteins, fats, carbohydrates, ash, fibers and moisture], Association of Official Analytical Chemists methods [AOAC] were used and titration method for ascorbic acid determination. It is evident from the results that the crude extract and its fractions accumulate significant concentrations of both micro and macro nutrients. The significant quantities of essential life nutrients like proteins, fats, carbohydrates and ascorbic acid along with ash, fiber and moisture contents were also found in extracts. It is concluded that the extracts of rhizomes accumulated significant quantities of life indispensible nutrients and validated the ethnobotanical uses of the plant as tonic and energizer

Elemental analysis of Echornia crassipes [Merit.] Schlecht.

Elemental analysis of Echornia crassipes [Merit.] Schlecht showed the presence of Al, Cr, Fe, K, Mg, Mn, Na, Ni, Pb, Sn, Sr and Zn in the leaves and rhizomes. K was in maximum and Pb in minimum quantity in the leaves while in rhizomes Ca was maximum and Pb was minimum

Role of postoperative antibiotics after appendectomy in non-perforated appendicitis

To determine the role of postoperative antibiotics in reducing the surgical site infections [SSIs] after open appendectomy in patients with non-perforated appendicitis [NPA]. Randomized controlled trial. The Department of Surgery, King Saud Medical City, Riyadh, Kingdom of Saudi Arabia, from January 2010 to July 2011. Three hundred and seventy seven patients, who underwent appendectomy for NPA and fulfilled the selection criteria, were randomized into two groups. The patients in group A received a single dose of pre-operative antibiotics [cefuroxime sodium and metronidazole], while the group B patients received one more dose of the same antibiotics postoperatively. Patients of both the groups were followed-up for 30 days to assess the postoperative infective complications. Group A had 195, while group B comprised of 182 patients. The groups were comparable in the baseline characteristics. Statistically there was no significant difference in rates of SSIs between both the groups [p = 0.9182]. Mean hospital stay was 2.29 +/- 0.81 and 2.35 +/- 0.48 days for group A and B respectively [p = 0.4403]. None of the patients developed intraabdominal collection. Single dose of pre-operative antibiotics [cefuroxime and metronidazole] was sufficient in reducing the SSIs after appendectomy for NPA. Postoperative antibiotics did not add an appreciable clinical benefit in these patients

Abdominal wall abscess following laparoscopic cholecystectomy: an unusual late complication of lost Gallstones

Laparoscopic Cholecystectomy [LC] is associated with a significant risk of gallbladder perforation with spillage of bile and stones into the peritoneal cavity. The retrieval of the spilled stones is not always possible by laparoscopic technique. Majority of these cases do not have any problem in future but sometimes the lost stones lead to serious complications. The authors present a case of lost gallstones, which resulted into an abdominal wall abscess and discharging sinus 9 years after LC. This late presentation is among the very few reports after LC. Risk factors for gallbladder perforation, various techniques to avoid spillage of stones, possible complications and their management is discussed

Bibliography of the genus Rosa l.

Rosa is a very important and complicated genus of the family Rosaceae. The species of this genus are very variable and hybridize easily. In this paper Rosa is reviewed on account of its classification, floristic literature, palynology, cytology, evolution and phytochemistry

Outcome of primary repair in penentrating colonic injuries

To assess the outcome of primary repair in penetrating colonic injuries in terms of regional/local morbidity [suture line breakdown, intra-abdominal abscess] and mortality. Design: Prospective, interventional study. Place and Duration of Study: Surgical Unit II at Lahore General Hospital, Lahore, over a period of 3 1/2 years from June 1999 to December 2002. Patients and Out of 38 consecutive patients with penetrating colon injuries, a selective group of 25 patients [65.7%] undergoing primary repair [simple suture, resection and anastomosis without covering colostomy and right hemicolectomy] were included in this study. The morbidity and mortality variables were recorded and statistically analyzed. Majority of our patients were of younger age group [mean 25 years]. Twenty patients [80%] were male. The commonest mode of injury was firearm injury [72%]. The time interval between injury and repair was 3-11 hours [mean 7 hours]. Simple repair of colon with interrupted stitches was the commonest procedure performed [44%], followed by right hemicolectomy [32%]. Colon related complications developed in 3 patients [12%], which included two fecal fistulae and one intra-abdominal collection. One patient died of septicemia [4%]. Hospital stay ranged between 6-16 days [mean 8 days]. Primary repair is a safe method of managing penetrating colon injuries in carefully selected patients

challenges of medicinal plants of Pakistan in the new millennium

This article reviews the current status of medicinal plants in Pakistan, identifies major issues, and focuses on priority areas for research and development. The conservation and development activities in medicinal plants are currently facing a number of constraints such as lack of information database and exchange, co-ordination, collaboration and funds. It suggests a holistic approach of the study with emphasis on research and development in order to meet the challenges of medicinal plants of the. motherland in the new millennium